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Saturday, August 19, 2023

Peaceful Revolution

From Wikipedia, the free encyclopedia
Berlin Wall falls at the Brandenburg Gate, 10 November 1989

The Peaceful Revolution (German: Friedliche Revolution), as a part of the Revolutions of 1989, was the process of sociopolitical change that led to the opening of East Germany's borders with the West, the end of the ruling of the Socialist Unity Party of Germany (SED) in the German Democratic Republic (GDR or "East Germany") in 1989 and the transition to a parliamentary democracy, which later enabled the reunification of Germany in October 1990. This happened through non-violent initiatives and demonstrations. This period of change is referred to in German as Die Wende (German pronunciation: [diː ˈvɛndə], "the turning point").

These events were closely linked to Soviet leader Mikhail Gorbachev's decision to abandon Soviet hegemony in Eastern Europe as well as the reformist movements that spread through Eastern Bloc countries. In addition to the Soviet Union's shift in foreign policy, the GDR's lack of competitiveness in the global market, as well as its sharply rising national debt, hastened the destabilization of the SED's one-party state.

Those driving the reform process within the GDR included intellectuals and church figures who had been in underground opposition for several years, people attempting to flee the country, and peaceful demonstrators who were no longer willing to yield to the threat of violence and repression.

Because of its hostile response to the reforms implemented within its "socialist brother lands", the SED leadership was already increasingly isolated within the Eastern Bloc when it permitted the opening of the border at the Berlin Wall on 9 November 1989. Through a change in leadership and a willingness to negotiate, the SED attempted to win back the political initiative, but control of the situation increasingly lay with the West German government under Chancellor Helmut Kohl.

From December 1989, the GDR government of Prime Minister Hans Modrow was influenced by the Central Round Table, which put into action the dissolution of the Stasi and prepared free elections. After an election win for a coalition of parties that supported German reunification, the political path within the GDR was clear.

Timeline

Monday demonstration in Leipzig, 16 October 1989

Significant events:

Queue outside a bank in Gera, on 1 July 1990, the day that the GDR adopted the West German currency

Soviet policy toward the Eastern Bloc

A fundamental shift in Soviet policy toward the Eastern Bloc nations under Mikhail Gorbachev in the late 1980s was the prelude to widespread demonstrations against the Socialist Unity Party, which had ruled East Germany since the country was founded on 7 October 1949. Previous uprisings – East Germany (1953), Czechoslovakia (1953), Poland (1956), Hungary (1956) and the Prague Spring (1968) – were harshly put down by Soviet troops. The Soviet reaction to the Polish crisis of 1980–1981 was already one of non-intervention.

Having initiated a policy of glasnost (openness) and emphasized the need for perestroika (economic restructuring), in July 1989, Gorbachev permitted the Warsaw Pact nations to initiate their own political and economic reforms within the terms of the treaty.

The policy of non-interference in Soviet Bloc countries' internal affairs was made official with Gorbachev's statement on 26 October 1989 that the "Soviet Union has no moral or political right to interfere in the affairs of its East European neighbors". This was dubbed the Sinatra Doctrine, by Gorbachev's spokesman Gennadi Gerasimov who joked "You know the Frank Sinatra song, 'I Did It My Way'? Hungary and Poland are doing it their way."

East German reaction to Soviet reforms

Following the reforms, by 1988 relations had soured between Gorbachev and Honecker, although the relationship of KGB and the Stasi was still close.

In November 1988, the distribution of the Soviet monthly magazine Sputnik, was prohibited in East Germany because its new open political criticisms annoyed upper circles of the GDR leadership. This caused a lot of resentment and helped to activate the opposition movement. After a year, the sale of the magazine was reinstated, and censored editions of the issues from the preceding year were made available in a special edition for East Germans.

Catalysts for the crisis of 1989

Economic situation

East Germany's economy was stronger than other Eastern Bloc countries and it was the most successful of the CMEA countries. It was the Soviet Union's most important trading partner, although it was very much subordinate. It was a net exporter of technology. Its shared language, cultural and personal connections with West Germany helped to boost its economy. Its trade with West Germany was 50 to 60 percent of its total trade with Western nations.

Although it was hailed as a communist success story, by the late 1980s its economic growth had slowed to less than 1% per annum and the government's economic goals were not reached. It had to deal with increasing global competition with run-down industrial infrastructure, and shortages of labour and raw materials. From 1986, its products were often seen as inferior and orders delivered to the Soviet Union were increasingly rejected due to poor quality control standards. Other communist countries were pursuing market-led reforms, but the government of Erich Honecker rejected such changes, claiming they contradicted Marxist ideology. More than one-fifth of the government's income was spent on subsidising the costs of housing, food and basic goods.

Poor sewerage and industrial infrastructure led to major environmental problems. Half the country's domestic sewage was untreated, as was most industrial waste. Over a third of all East Germany's rivers, and almost a third of its reservoirs and half of its lakes were severely polluted. Its forests were damaged by sulphur dioxide and air pollution in cities was a problem. Protests about these environmental problems played a large part in the Peaceful Revolution.

Workers in East Germany earned more than those in other communist countries and they had better housing than most of them. But East German workers compared themselves with West Germans, who were much better off, which was another cause of dissatisfaction.

Electoral fraud

In practice, there was no real choice in GDR elections, which consisted of citizens voting to approve a pre-selected list of National Front candidates. The National Front was, in theory, an alliance of political parties, but they were all controlled by the SED party, which controlled the Volkskammer, the East German parliament. The results of elections were generally about 99% "Yes" in favour of the list. However, before the 7 May 1989 election there were open signs of citizens' dissatisfaction with the government and the SED was concerned that there could be a significant number of "No" votes. The number of applications for an Ausreiseantrag (permission to leave the country) had increased and there was discontent about housing conditions and shortages of basic products.

In the weeks before the election, opposition activists called for it to be boycotted, and distributed a leaflet criticising Erich Honecker's regime. Nevertheless, the result of the election was proclaimed as 98.5% "Yes". Clear evidence of electoral fraud was smuggled to the West German media. When this information was broadcast, it was picked up in East Germany, instigating protests.

Citizens demanded their legal right to observe the vote count. Election monitors from churches and other groups showed the figures had been falsified. About 10% of voters had put a line through every name on the list, indicating a "No" vote, and about 10% of the electorate had not voted at all. After the initial protests on 7 May, there were demonstrations on the seventh of every month in Alexanderplatz in Berlin.

Gaps in the Iron Curtain

Background

The Soviet Union and the Eastern bloc states had strongly isolationist policies and they developed complex systems and infrastructure to restrict their citizens travel beyond the Iron Curtain. About 3.5 million people left the GDR for West Germany before the building of the Berlin Wall and the Inner German border in August 1961. After that it was still possible to leave legally, by applying for and receiving an Ausreiseantrag [de] (permission to leave). Between 1961 and 1988 about 383,000 people left this way.

The government also forcibly exiled people, and political prisoners and their families could be ransomed to the West German government, although those involved had no choice in the matter. Between 1964 and 1989 a recorded 33,755 political prisoners and about 250,000 of their relatives and others were "sold" to West Germany.

Most of those who tried to escape illegally after 1961 travelled to other Eastern Bloc countries, as they believed their western borders were easier to breach than East Germany's. Around 7,000–8,000 East Germans escaped through Bulgaria, Hungary and Czechoslovakia between 1961 and 1988. However, the majority of attempts were thwarted and those caught were arrested and sent back to face the East German legal system. Some were also shot and killed by border guards. 

Opening of the Hungarian and Czechoslovak borders

The Hungarian leader, János Kádár, retired on 22 May 1988 and other political parties were formed which challenged the old socialist order in Hungary, leading to a period of liberalisation. Almost a year later, on 2 May 1989, the Hungarian government began dismantling its border fence with Austria. This encouraged East German citizens to start travelling to Hungary in the hope of being able to get to the west more easily, not only over the border, but also by going to the West German embassy in Budapest and seeking asylum. On 27 June 1989 the Hungarian foreign minister Gyula Horn and his Austrian counterpart Alois Mock symbolically cut the border fence just outside Sopron. After the demolition of the border facilities, the patrols of the heavily armed Hungarian border guards were tightened and there was still a shooting order.

On 10 August 1989, Hungary announced it would be further relaxing its handling of first-time East German border offenders, which had already become lenient. It stamped the passports of people caught trying to illegally cross the border, rather than arresting them or reporting them to the East German authorities; first-time offenders would just get a warning, and no stamp. It also announced a proposal to downgrade illegal border crossing from a crime to a misdemeanour.

Otto von Habsburg, who played a leading role in opening the Iron Curtain

The Pan-European Picnic at the Austro-Hungarian border followed on 19 August 1989. This was a celebration of more open relationships between east and west, near Sopron, but on the Austrian side of the border. The opening of the border gate then set in motion a peaceful chain reaction, at the end of which there was no longer a GDR or an Iron Curtain, and the Eastern Bloc had disintegrated. The idea of opening the border at a ceremony came from Otto von Habsburg and was brought up by him to Miklós Németh, the then Hungarian Prime Minister, who promoted the idea. The border was temporarily opened at 3 pm, and 700–900 East Germans, who had travelled there after being tipped off, rushed across, without intervention from Hungarian border guards. It was the largest escape movement from East Germany since the Berlin Wall was built in 1961. The local organization in Sopron took over the Hungarian Democratic Forum, the other contacts were made via Habsburg and the Hungarian Minister of State Imre Pozsgay. Extensive advertising for the planned picnic was made by posters and flyers among the GDR holidaymakers in Hungary. The Austrian branch of the Paneuropean Union, which was then headed by Karl von Habsburg, distributed thousands of brochures inviting them to a picnic near the border at Sopron. Habsburg and Imre Pozsgay saw the event also as an opportunity to test Mikhail Gorbachev’s reaction to an opening of the border on the Iron Curtain. In particular, it was examined whether Moscow would give the Soviet troops stationed in Hungary the command to intervene. The West German government was already prepared for the mass escape, and trains and coaches were ready to take the escapees from Vienna to Giessen, near Frankfurt, where a refugee reception centre was waiting for the new arrivals. After the Pan-European Picnic, Erich Honecker dictated to the Daily Mirror of August 19, 1989: “Habsburg distributed leaflets far into Poland, on which the East German holidaymakers were invited to a picnic. When they came to the picnic, they were given gifts, food and Deutsche Mark, and then they were persuaded to come to the West.” But with the mass exodus at the Pan-European Picnic, the subsequent hesitant behavior of the Socialist Unity Party of East Germany and the non-intervention of the Soviet Union broke the dams.

Erich Honecker

About 100,000 East Germans then travelled to Hungary, hoping to also get across the border. Many people camped in the garden of the West German embassy in Budapest, in parks and around the border areas. Although the East German government asked for these people to be deported back to the GDR, Hungary, which had signed the 1951 Convention Relating to the Status of Refugees on 14 March 1989, refused.

From 10 September 1989, the Hungarian government allowed all East Germans to cross the Austro-Hungarian border without hindrance. Tens of thousands left and many also travelled to Czechoslovakia, whose government also gave in to demands to open its western border.

The East German government gave in to pressure to allow special trains carrying East German refugees from Prague to West Germany, to travel via East Germany. Between the first and eighth of October 1989, 14 so-called "Freedom Trains" (German: Flüchtlingszüge aus Prag [de]) carried a total of 12,000 people to Hof, in Bavaria. Large crowds gathered to cheer the trains as they passed.

Newly formed opposition

Demonstrators in Schwerin, holding banners supporting the New Forum, 23 October 1989

As a result of new hopes inspired by the mass exodus of East Germans via Hungary, several opposition groups formed in Autumn 1989, with the aim of bringing about the same sorts of reforms in the GDR that had been instituted in Poland and Hungary.

The largest of these was the New Forum (German:Neues Forum). It was founded by the artist Bärbel Bohley along with Jens Reich and Jutta Seidel. It had over 200,000 members within a few weeks of being set up. On 20 September 1989 it applied to field candidates in the March 1990 general election. New Forum acted as an umbrella organisation for activist groups across the country. Other new political organisations including Democratic Awakening, United Left, and the Socialist Democratic Party formed. They all had similar aims, wanting greater democracy and environmental reforms.

Decisive events of 1989

Tiananmen Square protests

East Germans could see news about the Tiananmen Square democracy demonstration between April and June 1989 on West German television broadcasts. When the Chinese regime brutally crushed the demonstration on 3–4 June, several hundred and possibly several thousand protesters were killed. This caused concern for the nascent East German protest movement, that had demonstrated against electoral fraud in May. "We too feared the possibility of a 'Chinese solution,'" said Pastor Christian Fuehrer of the Nikolaikirche in Leipzig.

The Neues Deutschland, the official newspaper of the SED, supported the crackdown by the Chinese authorities. The German People's Congress proclaimed it was "a defeat for counter-revolutionary forces." Sixteen civil rights activists in East Berlin were arrested for protesting against the actions of the Chinese government.

However, growing political agitation in East Germany was part of wider liberalisation within the Soviet bloc resulting from Gorbachev's reforms – the country was not as isolated as China. Although Gorbachev visited Beijing in May 1989 to normalize Sino-Soviet relations, and the Chinese people were enthusiastic about his ideas, he had no influence with the Chinese government. Rather than stifle the East Germans' protests, the Tiananmen Square demonstration was further inspiration for their desire to instigate change.

40th anniversary of GDR

Erich Honecker, Mikhail Gorbachev and other guests of honour at the 40th East German Republic Day celebrations, 7 October 1989
Confrontation between security forces and demonstrators at the Gethsemane Church protest in Schönhauser Allee, Berlin, 7 October 1989

Celebrations for Republic Day on 7 October 1989, the 40th anniversary of the founding of the GDR, were marred by demonstrations. There had been protests in the preceding weeks, and Hungary and Czechoslovakia now allowed East Germans to travel freely across their borders to the west. From 1 to 8 October, 14 "Freedom Trains" took 12,000 East German refugees from Prague across GDR territory to West Germany, with cheers from East Germans as they passed. All were signs that the anniversary, which Mikhail Gorbachev attended, would not run smoothly.

Although there were almost 500,000 Soviet troops stationed in the GDR, they were not going to help suppress any demonstrations. It later emerged that Gorbachev had ordered that the troops were to stay in their barracks during the commemorations. As the reformist Gorbachev was paraded along Unter den Linden, cheering crowds lining the street called out "Gorbi, Gorbi," and "Gorbi, help us." However, there were still fears of a Tiananmen Square-style crackdown, as on 2 October, the SED party official Egon Krenz was in Beijing, at the anniversary of the founding of People's Republic of China. There, he said, "In the struggles of our time, the GDR and China stand side by side."

On 7 October, a candelight demonstration with 1,500 protesters around Gethsemane Church in Prenzlauer Berg, Berlin was crushed by security forces, who beat people up and made around 500 arrests. Other protests outside the Palace of the Republic were also brutally repressed.

There were protests throughout the country, the most organised being three consecutive demonstrations in Saxony on 7, 8 and 9 October in Plauen, Dresden and Leipzig respectively. In Leipzig, there was no violence, as the 70,000 participants were too many for the 8,000 armed security forces present to tackle. "The message from Leipzig soared over the entire country: The masses had the power to topple the regime peacefully".

When numerous East Germans were arrested for protesting the 40th-anniversary celebrations, many of them sang "The Internationale" in police custody to imply that they, rather than their captors, were the real revolutionaries.

On 18 October, only eleven days after these events, Honecker was removed as head of the party and the state and was replaced by Egon Krenz.

Weekly demonstrations

A demonstration on 30 October 1989 in front of the town hall in Plauen

In addition to the GDR 40th anniversary demonstrations and the protests against electoral fraud, from September 1989 there were regular weekly pro-democracy demonstrations in towns and cities across the country. They are referred to as "Monday demonstrations" as that was the day they occurred in Leipzig, where they started, but they were staged on several days of the week. In Erfurt, for example, they happened on Thursdays. The first wave of these was from 4 September 1989 to March 1990. They continued sporadically until 1991.

The protesters called for an open border with West Germany, genuine democracy, and greater human rights and environmental protections. The most noted slogan protesters shouted was "Wir sind das Volk" ("We are the people"), meaning that in a real democracy, the people determine how the country is governed. After the fall of the Berlin Wall, in demonstrations calling for German reunification, this morphed into "Wir sind ein Volk" ("We are one people").

Churches were often pivotal in the demonstrations. The Leipzig "Monday demonstrations" stemmed from Monday prayer meetings at the Nikolaikirche (Church of St Nicholas). Prayers were said for people who had been mistreated by the state authorities, so the meetings took on a political character. The numbers attending grew and on 4 September 1989, it became a demonstration of over 1000 people in front of the church. The Stasi arrived to break it up, taking some demonstrators away in trucks.

Alexanderplatz demonstration in East Berlin, 4 November 1989

The demonstrations became a regular weekly event in Leipzig and around the country, with tens of thousands joining in. There were mass arrests and beatings at the Leipzig demonstrations on 11 September and going through until 2 October. After the demonstration on 9 October, in which the security forces were completely outnumbered by the 70,000 protesters and unable to hinder them, the demonstrations in Leipzig and elsewhere remained relatively peaceful. The largest gatherings were the Alexanderplatz demonstration in Berlin on 4 November 1989, and 11 November in Leipzig, each with an estimated 500,000 protesters, although there are claims that up to 750,000 were at the Berlin demonstration.

On the 28 October 1989, to try to calm the protests, an amnesty was issued for political prisoners being held for border crimes or for participation in the weekly demonstrations.

The first wave of demonstrations ended in March 1990 due to the forthcoming free parliamentary elections on 18 March.

Plan X

Ranis Castle in Thuringia was among the locations selected for an internment camp under Plan X. In Stasi documents, it was referred to as "Rosebush" (German: Rosenstock).

On 8 October 1989, Erich Mielke and Erich Honecker ordered the Stasi to implement "Plan X"—the SED's plan to arrest and indefinitely detain 85,939 East Germans during a state of emergency. According to John Koehler, Plan X had been in preparation since 1979 and was, "a carbon copy of how the Nazi concentration camps got their start after Hitler came to power in 1933."

By 1984, 23 sites had been selected for "isolation and internment camps." Those who were to be imprisoned in them ran into six categories; including anyone who had ever been under surveillance for anti-state activities, including all members of peace movements which were not under Stasi control.

According to Anna Funder:

The plans contained exact provisions for the use of all available prisons and camps, and when those were full for the conversion of other buildings: Nazi detention centers, schools, hospitals, and factory holiday hostels. Every detail was foreseen, from where the doorbell was located on the house of each person to be arrested to the adequate supply of barbed wire and the rules of dress and etiquette in the camps...

However, when Mielke sent the orders, codenamed "Shield" (German: Schild), to each local Stasi precinct to begin the planned arrests, he was ignored. Terrified of an East German version of the mass lynchings of Hungarian secret police agents during the 1956 Revolution, Stasi agents throughout the GDR fortified their office-buildings and barricaded themselves inside.

Ruling party starts to lose power

On 18 October 1989, the 77-year-old Erich Honecker was replaced as the General Secretary of the Socialist Unity Party by Egon Krenz. After the vote to oust Honecker passed, Stasi chief Erich Mielke "got nasty," and accused Honecker of political corruption. Honecker responded that Mielke should not open his mouth so much. Mielke responded by putting the last nail in Honecker's coffin. He announced that the Stasi had a file on the now-ousted leader. It contained proof of Honecker's corrupt business practices, sexual activities, and how, as a member of the underground Communist Party of Germany during the Nazi years, he had been arrested by the Gestapo and had named names.

Officially Honecker resigned due to ill health, but he had been sharply criticized by the party. Although Krenz, 52, was the youngest member of the Politburo, he was a hardliner who had congratulated the Chinese regime on its brutal crushing of the Tiananmen Square demonstration. The New Forum were doubtful about his ability to bring about reform, saying that "he would have to undertake 'tremendous efforts' to dispel the mistrust of a great part of the population."

Günter Mittag, who was responsible for managing the economy, and Joachim Hermann [de], editor of the Neues Deutschland and head of propaganda, were also removed from office.

On 7 November 1989, the entire Cabinet of the East German government, the 44-member Council of Ministers, led by Prime Minister Willi Stoph, resigned as a consequence of the political upheaval caused by the mass exodus of citizens via the Hungarian and Czechoslovakian borders and the ongoing protests. The Politburo of the SED remained the real holders of political power. Over 200,000 members of the SED had left the party during the previous two months. Hans Modrow became the prime minister and 17 November he formed a 28-member Council of Minister which included 11 non-SED ministers.

Krenz, the last SED leader of the GDR, was only in office for 46 days, resigning on 3 December, along with the rest of the SED Politburo and the Central Committee of the party. The country was then in practice run by Prime Minister Modrow. Krenz was succeeded as head of state by Manfred Gerlach.

Fall of the Berlin Wall and border opening

Queue at Wartha border crossing in Thuringia, 10 November 1989, as East Germans visit West Germany

After Hungary and Czechoslovakia allowed East Germans to cross to the west via their borders, there was nothing the GDR government could to do to prevent people leaving. Between 4–5 November, the weekend before the Berlin Wall was opened, over 50,000 people left. Party official Günter Schabowski announced at a press conference on the evening of Thursday 9 November 1989 that East Germans were free to travel through the checkpoints of the Berlin Wall and the inner German border.

After some initial confusion, with 20,000 people arriving at the Bornholmer Straße border crossing by 11.30 pm, chanting "Open the gate", Harald Jäger, a border official, allowed people to pass through into West Berlin. Over the next few days streams of cars queued at the checkpoints along the Berlin Wall and the inner German border to travel through to West Germany.

From 10 November, East Germans who had crossed the border queued outside West German banks to collect their Begrüßungsgeld ("Welcome Money"). This was a payment that the West German government had given to visiting East Germans since 1970. In 1989 the amount was 100 Deutsche Marks once per annum. Because East Germans' travel to the west had been very restricted, until the middle of the 1980s only about 60,000 visitors had received "Welcome Money". However, between 9 and 22 November alone, over 11 million East Germans had crossed into West Berlin or West Germany. In November and December about 4 billion DM was paid out, and the system was stopped on 29 December 1989.

Political situation during the transition

The fall of the Berlin Wall and opening of the inner German border set new challenges for both the government and the opposition in the GDR as well as those in power in the Federal Republic of Germany (FRG). General opinion was that the fate of the GDR rested with the attitude of the Soviet Union. In his memoirs, West German chancellor Helmut Kohl wrote that he had confronted Gorbachev in June 1989 with the view that German unity would arrive as surely as the Rhine would arrive at the sea; Gorbachev did not dispute this.

After 9 November there was not only a wave of demonstrations across the GDR but also a strong shift in the prevailing attitude to solutions. Instead of the chant "we are the people", the new refrain was "we are one people!" A problem for both the East and the West remained the continually high numbers moving from the GDR to the FRG, which created a destabilizing effect in the GDR while also placing a larger burden on the FRG to handle and integrate such large numbers.

Kohl's reunification plan

On the day the Berlin Wall fell, West German chancellor Kohl and his foreign minister Hans-Dietrich Genscher were on a state visit to Poland, which was cut short for the new situation. Only a day earlier, Kohl had set out new conditions for closer collaboration with the GDR leadership: the SED's abandonment of its monopoly on power, the allowing of independent parties, free elections, and the building up of a market economy. During a telephone conversation on 11 November 1989 with SED General Secretary Egon Krenz, who insisted that reunification was not on the agenda, Kohl conceded that the creation of "reasonable relations" was currently most pressing.

At first Kohl refrained from pushing for reunification to avoid raising annoyance abroad. His closest foreign adviser, Horst Teltschik, took heart though from opinion polls on 20 November 1989, which showed 70% of West Germans in favor of reunification and 48% considered it possible within ten years. More than 75% approved of financial aid for the GDR, though without tax increases. From Nikolai Portugalow, an emissary of Gorbachev's, Teilschik learned that Hans Modrow's suggestion of a treaty between the German states had prompted the Soviets to plan for "the unthinkable".

With Kohl's blessing, Teltschik developed a path for German unification. To his "Ten Point Program for Overcoming the Division of Germany and Europe", Kohl made some additions and read it aloud in parliament on 28 November 1989. Starting with immediate measures, the path included a contractual arrangement and the development of confederative structures to conclude with one federation.

The plan was broadly accepted in parliament with the exception of the Green Party, which endorsed the independence of the GDR in "a third way". The Social Democratic Party (SPD) was skeptical and divided. Former chancellor Willy Brandt coined the expression "Now grows together, what belongs together" on 10 November 1989. Oskar Lafontaine, soon to be the SPD's chancellor candidate, emphasised the incalculable financial risks and the curtailment of the number of those leaving.

International reactions to developments

The sudden announcement of Kohl's plan irritated European heads of states and Soviet chief Gorbachev. British Prime Minister Margaret Thatcher saw international stability becoming endangered and raised doubts about the peacefulness of a united and restrengthened Germany. French President François Mitterrand was concerned that the German government could give up its commitment to the European integration process and instead focus on its national interests and ambitions for power. In early December 1989, he and Gorbachev sought to ensure "that the whole European process develops faster than the German question and that it overtakes the German development. We must form pan-European structures." Gorbachev informed West German foreign minister Genscher that Kohl was behaving "like a bull in a china shop".

In light of these frosty reactions, the West German government viewed a meeting of the four Allied powers on 11 December 1989 as a demonstrative affront. Only the United States government, under George H. W. Bush, offered the West German chancellor support by setting out its own interests in any potential German reunification the day after Kohl's plan.

Kohl stressed that the driving factor behind the developments was the GDR populace and not the FRG government, which was itself surprised by the events and had to react. He aimed to preempt a state visit by Mitterrand on 20–22 December 1989 and planned talks with Minister President Modrow. In Dresden on 19 December, Kohl spoke before a crowd of 100,000, who broke out into cheers when he stated: "My goal remains—if the historical hour allows—the uniting of our nation".

When Mitterrand realized that controlling development from outside was not possible, he sought to commit the West German government to a foreseeable united Germany on two matters: on the recognition of Poland's western border and on hastened European integration through the establishment of a currency union. In January 1990, the Soviet Union sent understanding signals by appealing to West Germany for food deliveries. On 10 February 1990, Kohl and his advisers had positive talks with Gorbachev in Moscow.

Situation in the GDR

After his election as Minister President in the People's Chamber on 13 November 1989, Hans Modrow affirmed on 16 November that, from the GDR viewpoint, reunification was not on the agenda.

Since the end of October, opposition groups had called for the creation of a round table. They released a communal statement: "In light of the critical situation in our country, which can no longer be controlled by the previous power and responsibility structures, we demand that representatives of the GDR population come together to negotiate at a round table, to established conditions for constitutional reform and for free elections."

East German author Christa Wolf, who on the night before the opening of the border had called for people to remain in the GDR, read an appeal titled "For Our Country" on 28 November 1989; it was supported by GDR artists and civil liberties campaigners as well as critical SED members. During a press conference the same day, the author Stefan Heym also read the appeal, and within a few days it had received 1.17 million signatures. It called for "a separate identity for the GDR" to be established and warned against a "sell-out of our material and moral values" through reunification, stating there was still "the chance to develop a socialist alternative to the FRG as an equal partner amongst the states of Europe".

At the first meeting of the Central Round Table on 7 December 1989, the participants defined the new body as an advisory and decision-making institution. Unlike the Polish example, where the Solidarity delegates confronted the government, the Central Round Table was formed from representatives of numerous new opposition groups and delegates in equal number from the SED, bloc parties, and the SED-linked mass organizations. Church representatives acted as moderators.

The socialist reform program of Modrow's government lacked support both domestically and internationally. On a visit to Moscow in January 1990, Modrow admitted to Gorbachev: "The growing majority of the GDR population no longer supports the idea of the existence of two German states; it no longer seems possible to sustain this idea. … If we don't grasp the initiative now, then the process already set in motion will spontaneously and eruptively continue onward without us being able to have any influence upon it".

To expand the trust in his own government for the transitional phase until free elections, on 22 January 1990 Modrow offered the opposition groups the chance to participate in government. The majority of these groups agreed to a counteroffer of placing candidates from the Central Round Table in a non-party transitional government. Modrow considered this an attempt to dismantle his government and rejected it on 28 January. After lengthy negotiations and Modrow's threatening to resign, the opposition relented and accepted a place in the government as "ministers without portfolio". However, when Modrow committed to a one-nation Germany a few days later, the United Left withdrew its acceptance due to "a breach of trust" and rejected being involving in the government.

After the entry into the cabinet on 5 February 1990, all nine new "ministers" traveled with Modrow to Bonn for talks with the West German government on 13 February. As with Kohl's visit to Dresden two months earlier, Modrow was denied immediate financial support to avoid the threat of insolvency (although a prospective currency union had been on offer for several days). The talks were largely unproductive, with Kohl unwilling to make any decisive appointments with the pivotal election only weeks away.

Die Wende

Die Wende means "the turn" or "the turning point". It was first used in reference to the Peaceful Revolution on 16 October 1989 in Der Spiegel. The term was first used publicly in East Germany on 18 October by the last communist leader, Egon Krenz, in a speech to the Volkskammer upon his election as General Secretary.

Friday, August 18, 2023

Iron ore


From Wikipedia, the free encyclopedia
Hematite, the main iron ore found in Brazilian mines
Stockpiles of iron ore pellets like this one are used in steel production
An illustration of iron ore being unloaded at docks in Toledo, Ohio

Iron ores are rocks and minerals from which metallic iron can be economically extracted. The ores are usually rich in iron oxides and vary in color from dark grey, bright yellow, or deep purple to rusty red. The iron is usually found in the form of magnetite (Fe
3
O
4
, 72.4% Fe), hematite (Fe
2
O
3
, 69.9% Fe), goethite (FeO(OH), 62.9% Fe), limonite (FeO(OH)·n(H2O), 55% Fe) or siderite (FeCO3, 48.2% Fe).

Ores containing very high quantities of hematite or magnetite, typically greater than about 60% iron, are known as natural ore or direct shipping ore, and can be fed directly into iron-making blast furnaces. Iron ore is the raw material used to make pig iron, which is one of the main raw materials to make steel—98% of the mined iron ore is used to make steel. In 2011 the Financial Times quoted Christopher LaFemina, mining analyst at Barclays Capital, saying that iron ore is "more integral to the global economy than any other commodity, except perhaps oil".

Sources

Metallic iron is virtually unknown on the surface of the Earth except as iron-nickel alloys from meteorites and very rare forms of deep mantle xenoliths. Some iron meteorites are thought to have originated from accreted bodies 1,000 km in diameter or larger The origin of iron can be ultimately traced to the formation through nuclear fusion in stars, and most of the iron is thought to have originated in dying stars that are large enough to collapse or explode as supernovae. Although iron is the fourth-most abundant element in the Earth's crust, composing about 5%, the vast majority is bound in silicate or, more rarely, carbonate minerals (for more information, see iron cycle). The thermodynamic barriers to separating pure iron from these minerals are formidable and energy-intensive; therefore, all sources of iron used by human industry exploit comparatively rarer iron oxide minerals, primarily hematite.

Prior to the industrial revolution, most iron was obtained from widely available goethite or bog ore, for example, during the American Revolution and the Napoleonic Wars. Prehistoric societies used laterite as a source of iron ore. Historically, much of the iron ore utilized by industrialized societies has been mined from predominantly hematite deposits with grades of around 70% Fe. These deposits are commonly referred to as "direct shipping ores" or "natural ores". Increasing iron ore demand, coupled with the depletion of high-grade hematite ores in the United States, led after World War II to the development of lower-grade iron ore sources, principally the utilization of magnetite and taconite.

Iron ore mining methods vary by the type of ore being mined. There are four main types of iron ore deposits worked currently, depending on the mineralogy and geology of the ore deposits. These are magnetite, titanomagnetite, massive hematite and pisolitic ironstone deposits.

Banded iron formations

Rock, estimated as being 2.1-billion years old, used in banding iron
Processed taconite pellets with reddish surface oxidation used in steelmaking with a U.S. quarter (diameter: 24 mm [0.94 in]) shown for scale

Banded iron formations (BIFs) are sedimentary rocks containing more than 15% iron composed predominantly of thinly bedded iron minerals and silica (as quartz). Banded iron formations occur exclusively in Precambrian rocks, and are commonly weakly to intensely metamorphosed. Banded iron formations may contain iron in carbonates (siderite or ankerite) or silicates (minnesotaite, greenalite, or grunerite), but in those mined as iron ores, oxides (magnetite or hematite) are the principal iron mineral. Banded iron formations are known as taconite within North America.

The mining involves moving tremendous amounts of ore and waste. The waste comes in two forms: non-ore bedrock in the mine (overburden or interburden locally known as mullock), and unwanted minerals, which are an intrinsic part of the ore rock itself (gangue). The mullock is mined and piled in waste dumps, and the gangue is separated during the beneficiation process and is removed as tailings. Taconite tailings are mostly the mineral quartz, which is chemically inert. This material is stored in large, regulated water settling ponds.

Magnetite ores

The key parameters for magnetite ore being economic are the crystallinity of the magnetite, the grade of the iron within the banded iron formation host rock, and the contaminant elements which exist within the magnetite concentrate. The size and strip ratio of most magnetite resources is irrelevant as a banded iron formation can be hundreds of meters thick, extend hundreds of kilometers along strike, and can easily come to more than three billion or more tonnes of contained ore.

The typical grade of iron at which a magnetite-bearing banded iron formation becomes economic is roughly 25% iron, which can generally yield a 33% to 40% recovery of magnetite by weight, to produce a concentrate grading in excess of 64% iron by weight. The typical magnetite iron ore concentrate has less than 0.1% phosphorus, 3–7% silica and less than 3% aluminium.

Currently magnetite iron ore is mined in Minnesota and Michigan in the U.S., Eastern Canada and Northern Sweden. Magnetite-bearing banded iron formation is currently mined extensively in Brazil, which exports significant quantities to Asia, and there is a nascent and large magnetite iron ore industry in Australia.

Direct-shipping (hematite) ores

Direct-shipping iron ore (DSO) deposits (typically composed of hematite) are currently exploited on all continents except Antarctica, with the largest intensity in South America, Australia and Asia. Most large hematite iron ore deposits are sourced from altered banded iron formations and rarely igneous accumulations.

DSO deposits are typically rarer than the magnetite-bearing BIF or other rocks which form its main source or protolith rock, but are considerably cheaper to mine and process as they require less beneficiation due to the higher iron content. However, DSO ores can contain significantly higher concentrations of penalty elements, typically being higher in phosphorus, water content (especially pisolite sedimentary accumulations) and aluminium (clays within pisolites). Export-grade DSO ores are generally in the 62–64% Fe range.

Magmatic magnetite ore deposits

Granite and ultrapotassic igneous rocks were sometimes used to segregate magnetite crystals and form masses of magnetite suitable for economic concentration. A few iron ore deposits, notably in Chile, are formed from volcanic flows containing significant accumulations of magnetite phenocrysts. Chilean magnetite iron ore deposits within the Atacama Desert have also formed alluvial accumulations of magnetite in streams leading from these volcanic formations.

Some magnetite skarn and hydrothermal deposits have been worked in the past as high-grade iron ore deposits requiring little beneficiation. There are several granite-associated deposits of this nature in Malaysia and Indonesia.

Other sources of magnetite iron ore include metamorphic accumulations of massive magnetite ore such as at Savage River, Tasmania, formed by shearing of ophiolite ultramafics.

Another, minor, source of iron ores are magmatic accumulations in layered intrusions which contain a typically titanium-bearing magnetite often with vanadium. These ores form a niche market, with specialty smelters used to recover the iron, titanium and vanadium. These ores are beneficiated essentially similar to banded iron formation ores, but usually are more easily upgraded via crushing and screening. The typical titanomagnetite concentrate grades 57% Fe, 12% Ti and 0.5% V
2
O
5
.

Mine tailings

For every one ton of iron ore concentrate produced approximately 2.5–3.0 tons of iron ore tailings will be discharged. Statistics show that there are 130 million tons of iron ore discharged every year. If, for example, the mine tailings contain an average of approximately 11% iron there would be approximately 1.41 million tons of iron wasted annually. These tailings are also high in other useful metals such as copper, nickel, and cobalt, and they can be used for road-building materials like pavement and filler and building materials such as cement, low-grade glass, and wall materials. While tailings are a relatively low-grade ore, they are also inexpensive to collect as they do not have to be mined. Because of this companies such as Magnetation have started reclamation projects where they use iron ore tailings as a source of metallic iron.

The two main methods of recycling iron from iron ore tailings are magnetizing roasting and direct reduction. Magnetizing roasting uses temperatures between 700 and 900 °C for a time of under 1 hour to produce an iron concentrate (Fe3O4) to be used for iron smelting. For magnetizing roasting it is important to have a reducing atmosphere to prevent oxidization and the formation of Fe2O3 because it is harder to separate as it is less magnetic. Direct reduction uses hotter temperatures of over 1000 °C and longer times of 2–5 hours. Direct reduction is used to produce sponge iron (Fe) to be used for steel making. Direct reduction requires more energy as the temperatures are higher and the time is longer and it requires more reducing agent than magnetizing roasting.

Extraction

Lower-grade sources of iron ore generally require beneficiation, using techniques like crushing, milling, gravity or heavy media separation, screening, and silica froth flotation to improve the concentration of the ore and remove impurities. The results, high-quality fine ore powders, are known as fines.

Magnetite

Magnetite is magnetic, and hence easily separated from the gangue minerals and capable of producing a high-grade concentrate with very low levels of impurities.

The grain size of the magnetite and its degree of commingling with the silica groundmass determine the grind size to which the rock must be comminuted to enable efficient magnetic separation to provide a high purity magnetite concentrate. This determines the energy inputs required to run a milling operation.

Mining of banded iron formations involves coarse crushing and screening, followed by rough crushing and fine grinding to comminute the ore to the point where the crystallized magnetite and quartz are fine enough that the quartz is left behind when the resultant powder is passed under a magnetic separator.

Generally most magnetite banded iron formation deposits must be ground to between 32 and 45 micrometers in order to produce a low-silica magnetite concentrate. Magnetite concentrate grades are generally in excess of 70% iron by weight and usually are low phosphorus, low aluminium, low titanium and low silica and demand a premium price.

Hematite

Due to the high density of hematite relative to associated silicate gangue, hematite beneficiation usually involves a combination of beneficiation techniques.

One method relies on passing the finely crushed ore over a slurry containing magnetite or other agent such as ferrosilicon which increases its density. When the density of the slurry is properly calibrated, the hematite will sink and the silicate mineral fragments will float and can be removed.

Production and consumption

Evolution of the extracted iron ore grade in Canada, China, Australia, Brazil, United States, Sweden, the Soviet Union and Russia, and the worldworld. The recent drop in world ore grade is due to significant consumption of low-grade Chinese ores. American ore, on the other hand, is typically upgraded between 61% and 64% before being sold.
The mine production estimates for China are estimated from the National Bureau of Statistics China's crude ore statistics, rather than usable ore as reported for the other countries.
Country Production
Australia 817
Brazil 397
China 375*
India 156
Russia 101
South Africa 73
Ukraine 67
United States 46
Canada 46
Iran 27
Sweden 25
Kazakhstan 21
Other countries 132
Total world 2,280

Iron is the world's most commonly used metal—steel, of which iron ore is the key ingredient, representing almost 95% of all metal used per year. It is used primarily in structures, ships, automobiles, and machinery.

Iron-rich rocks are common worldwide, but ore-grade commercial mining operations are dominated by the countries listed in the table aside. The major constraint to economics for iron ore deposits is not necessarily the grade or size of the deposits, because it is not particularly hard to geologically prove enough tonnage of the rocks exist. The main constraint is the position of the iron ore relative to market, the cost of rail infrastructure to get it to market and the energy cost required to do so.

Mining iron ore is a high-volume, low-margin business, as the value of iron is significantly lower than base metals. It is highly capital intensive, and requires significant investment in infrastructure such as rail in order to transport the ore from the mine to a freight ship. For these reasons, iron ore production is concentrated in the hands of a few major players.

World production averages two billion metric tons of raw ore annually. The world's largest producer of iron ore is the Brazilian mining corporation Vale, followed by Australian companies Rio Tinto Group and BHP. A further Australian supplier, Fortescue Metals Group Ltd, has helped bring Australia's production to first in the world.

The seaborne trade in iron ore—that is, iron ore to be shipped to other countries—was 849 million tonnes in 2004. Australia and Brazil dominate the seaborne trade, with 72% of the market. BHP, Rio and Vale control 66% of this market between them.

In Australia, iron ore is won from three main sources: pisolite "channel iron deposit" ore derived by mechanical erosion of primary banded-iron formations and accumulated in alluvial channels such as at Pannawonica, Western Australia; and the dominant metasomatically-altered banded iron formation-related ores such as at Newman, the Chichester Range, the Hamersley Range and Koolyanobbing, Western Australia. Other types of ore are coming to the fore recently, such as oxidised ferruginous hardcaps, for instance laterite iron ore deposits near Lake Argyle in Western Australia.

The total recoverable reserves of iron ore in India are about 9,602 million tonnes of hematite and 3,408 million tonnes of magnetite. Chhattisgarh, Madhya Pradesh, Karnataka, Jharkhand, Odisha, Goa, Maharashtra, Andhra Pradesh, Kerala, Rajasthan and Tamil Nadu are the principal Indian producers of iron ore. World consumption of iron ore grows 10% per annum on average with the main consumers being China, Japan, Korea, the United States and the European Union.

China is currently the largest consumer of iron ore, which translates to be the world's largest steel producing country. It is also the largest importer, buying 52% of the seaborne trade in iron ore in 2004. China is followed by Japan and Korea, which consume a significant amount of raw iron ore and metallurgical coal. In 2006, China produced 588 million tons of iron ore, with an annual growth of 38%.

Iron ore market

Iron ore prices (monthly)
  China import/inbound iron ore spot price
  Global iron ore price
Iron ore prices (daily)
25th October 2010 - 4th August 2022

Over the last 40 years, iron ore prices have been decided in closed-door negotiations between the small handful of miners and steelmakers which dominate both spot and contract markets. Traditionally, the first deal reached between these two groups sets a benchmark to be followed by the rest of the industry.

In recent years, however, this benchmark system has begun to break down, with participants along both demand and supply chains calling for a shift to short term pricing. Given that most other commodities already have a mature market-based pricing system, it is natural for iron ore to follow suit. To answer increasing market demands for more transparent pricing, a number of financial exchanges and/or clearing houses around the world have offered iron ore swaps clearing. The CME group, SGX (Singapore Exchange), London Clearing House (LCH.Clearnet), NOS Group and ICEX (Indian Commodities Exchange) all offer cleared swaps based on The Steel Index's (TSI) iron ore transaction data. The CME also offers a Platts-based swap, in addition to their TSI swap clearing. The ICE (Intercontinental Exchange) offers a Platts-based swap clearing service also. The swaps market has grown quickly, with liquidity clustering around TSI's pricing. By April 2011, over US$5.5 billion worth of iron ore swaps have been cleared basis TSI prices. By August 2012, in excess of one million tonnes of swaps trading per day was taking place regularly, basis TSI.

A relatively new development has also been the introduction of iron ore options, in addition to swaps. The CME group has been the venue most utilised for clearing of options written against TSI, with open interest at over 12,000 lots in August 2012.

Singapore Mercantile Exchange (SMX) has launched the world first global iron ore futures contract, based on the Metal Bulletin Iron Ore Index (MBIOI) which utilizes daily price data from a broad spectrum of industry participants and independent Chinese steel consultancy and data provider Shanghai Steelhome's widespread contact base of steel producers and iron ore traders across China. The futures contract has seen monthly volumes over 1.5 million tonnes after eight months of trading.

This move follows a switch to index-based quarterly pricing by the world's three largest iron ore miners—Vale, Rio Tinto and BHP—in early 2010, breaking a 40-year tradition of benchmark annual pricing.

Abundance by country

Available world iron ore resources

Iron is the most abundant element on earth but not in the crust. The extent of the accessible iron ore reserves is not known, though Lester Brown of the Worldwatch Institute suggested in 2006 that iron ore could run out within 64 years (that is, by 2070), based on 2% growth in demand per year.

Australia

Geoscience Australia calculates that the country's "economic demonstrated resources" of iron currently amount to 24 gigatonnes, or 24 billion tonnes. Another estimate places Australia's reserves of iron ore at 52 billion tonnes, or 30 per cent of the world’s estimated 170 billion tonnes, of which Western Australia accounts for 28 billion tonnes. The current production rate from the Pilbara region of Western Australia is approximately 430 million tonnes a year and rising. Gavin Mudd (RMIT University) and Jonathon Law (CSIRO) expect it to be gone within 30–50 years and 56 years, respectively. These 2010 estimates require on-going review to take into account shifting demand for lower-grade iron ore and improving mining and recovery techniques (allowing deeper mining below the groundwater table).

United States

In 2014, mines in the United States produced 57.5 million metric tons of iron ore with an estimated value of $5.1 billion. Iron mining in the United States is estimated to have accounted for 2% of the world's iron ore output. In the United States there are twelve iron ore mines with nine being open pit mines and three being reclamation operations. There were also ten pelletizing plants, nine concentration plants, two direct-reduced iron (DRI) plants and one iron nugget plant that were operating in 2014. In the United States the majority of iron ore mining is in the iron ranges around Lake Superior. These iron ranges occur in Minnesota and Michigan which combined accounted for 93% of the usable iron ore produced in the United States in 2014. Seven of the nine operational open pit mines in the United States are located in Minnesota as well as two of the three tailings reclamation operations. The other two active open pit mines were located in Michigan, in 2016 one of the two mines shut down. There have also been iron ore mines in Utah and Alabama; however, the last iron ore mine in Utah shut down in 2014 and the last iron ore mine in Alabama shut down in 1975.

Canada

In 2017, Canadian iron ore mines produced 49 million tons of iron ore in concentrate pellets and 13.6 million tons of crude steel. Of the 13.6 million tons of steel 7 million was exported, and 43.1 million tons of iron ore was exported at a value of $4.6 billion. Of the iron ore exported 38.5% of the volume was iron ore pellets with a value of $2.3 billion and 61.5% was iron ore concentrates with a value of $2.3 billion. Forty-six per cent of Canada's iron ore comes from the Iron Ore Company of Canada mine, in Labrador City, Newfoundland, with secondary sources including, the Mary River Mine, Nunavut.

Brazil

Brazil is the second-largest producer of iron ore with Australia being the largest. In 2015 Brazil exported 397 million tons of usable iron ore. In December 2017 Brazil exported 346,497 metric tons of iron ore and from December 2007 to May 2018 they exported a monthly average of 139,299 metric tons.

Ukraine

According to the U.S. Geological Survey's 2021 Report on iron ore, Ukraine is estimated to have produced 62 million tons of iron ore in 2020 (2019: 63 million tons), placing it as the seventh largest global centre of iron ore production, behind Australia, Brazil, China, India, Russia and South Africa. Producers of iron ore in Ukraine include: Ferrexpo, Metinvest and ArcelorMittal Kryvyi Rih.

India

According to the U.S. Geological Survey's 2021 Report on iron ore, India is estimated to produce 59 million tons of iron ore in 2020 (2019: 52 million tons), placing it as the seventh largest global centre of iron ore production, behind Australia, Brazil, China, Russia and South Africa and Ukraine.

Smelting

Iron ores consist of oxygen and iron atoms bonded together into molecules. To convert it to metallic iron it must be smelted or sent through a direct reduction process to remove the oxygen. Oxygen-iron bonds are strong, and to remove the iron from the oxygen, a stronger elemental bond must be presented to attach to the oxygen. Carbon is used because the strength of a carbon-oxygen bond is greater than that of the iron-oxygen bond, at high temperatures. Thus, the iron ore must be powdered and mixed with coke, to be burnt in the smelting process.

Carbon monoxide is the primary ingredient of chemically stripping oxygen from iron. Thus, the iron and carbon smelting must be kept at an oxygen-deficient (reducing) state to promote burning of carbon to produce CO not CO
2
.

  • Air blast and charcoal (coke): 2 C + O2 → 2 CO
  • Carbon monoxide (CO) is the principal reduction agent.
    • Stage One: 3 Fe2O3 + CO → 2 Fe3O4 + CO2
    • Stage Two: Fe3O4 + CO → 3 FeO + CO2
    • Stage Three: FeO + CO → Fe + CO2
  • Limestone calcining: CaCO3 → CaO + CO2
  • Lime acting as flux: CaO + SiO2CaSiO3

Trace elements

The inclusion of even small amounts of some elements can have profound effects on the behavioral characteristics of a batch of iron or the operation of a smelter. These effects can be both good and bad, some catastrophically bad. Some chemicals are deliberately added such as flux which makes a blast furnace more efficient. Others are added because they make the iron more fluid, harder, or give it some other desirable quality. The choice of ore, fuel, and flux determine how the slag behaves and the operational characteristics of the iron produced. Ideally iron ore contains only iron and oxygen. In reality this is rarely the case. Typically, iron ore contains a host of elements which are often unwanted in modern steel.

Silicon

Silica (SiO
2
) is almost always present in iron ore. Most of it is slagged off during the smelting process. At temperatures above 1,300 °C (2,370 °F) some will be reduced and form an alloy with the iron. The hotter the furnace, the more silicon will be present in the iron. It is not uncommon to find up to 1.5% Si in European cast iron from the 16th to 18th centuries.

The major effect of silicon is to promote the formation of grey iron. Grey iron is less brittle and easier to finish than white iron. It is preferred for casting purposes for this reason.Turner (1900, pp. 192–197) reported that silicon also reduces shrinkage and the formation of blowholes, lowering the number of bad castings.

Phosphorus

Phosphorus (P) has four major effects on iron: increased hardness and strength, lower solidus temperature, increased fluidity, and cold shortness. Depending on the use intended for the iron, these effects are either good or bad. Bog ore often has a high phosphorus content.

The strength and hardness of iron increases with the concentration of phosphorus. 0.05% phosphorus in wrought iron makes it as hard as medium carbon steel. High phosphorus iron can also be hardened by cold hammering. The hardening effect is true for any concentration of phosphorus. The more phosphorus, the harder the iron becomes and the more it can be hardened by hammering. Modern steel makers can increase hardness by as much as 30%, without sacrificing shock resistance by maintaining phosphorus levels between 0.07 and 0.12%. It also increases the depth of hardening due to quenching, but at the same time also decreases the solubility of carbon in iron at high temperatures. This would decrease its usefulness in making blister steel (cementation), where the speed and amount of carbon absorption is the overriding consideration.

The addition of phosphorus has a down side. At concentrations higher than 0.2% iron becomes increasingly cold short, or brittle at low temperatures. Cold short is especially important for bar iron. Although bar iron is usually worked hot, its uses often require it to be tough, bendable, and resistant to shock at room temperature. A nail that shattered when hit with a hammer or a carriage wheel that broke when it hit a rock would not sell well. High enough concentrations of phosphorus render any iron unusable. The effects of cold shortness are magnified by temperature. Thus, a piece of iron that is perfectly serviceable in summer, might become extremely brittle in winter. There is some evidence that during the Middle Ages the very wealthy may have had a high-phosphorus sword for summer and a low-phosphorus sword for winter.

Careful control of phosphorus can be of great benefit in casting operations. Phosphorus depresses the liquidus temperature, allowing the iron to remain molten for longer and increases fluidity. The addition of 1% can double the distance molten iron will flow. The maximum effect, about 500 °C, is achieved at a concentration of 10.2%. For foundry work Turner felt the ideal iron had 0.2–0.55% phosphorus. The resulting iron filled molds with fewer voids and also shrank less. In the 19th century some producers of decorative cast iron used iron with up to 5% phosphorus. The extreme fluidity allowed them to make very complex and delicate castings. But, they could not be weight bearing, as they had no strength.

There are two remedies for high phosphorus iron. The oldest, easiest and cheapest, is avoidance. If the iron that the ore produced was cold short, one would search for a new source of iron ore. The second method involves oxidizing the phosphorus during the fining process by adding iron oxide. This technique is usually associated with puddling in the 19th century, and may not have been understood earlier. For instance, Isaac Zane, owner of Marlboro Iron Works, did not appear to know about it in 1772. Given Zane's reputation for keeping abreast of the latest developments, the technique was probably unknown to the ironmasters of Virginia and Pennsylvania.

Phosphorus is generally considered to be a deleterious contaminant because it makes steel brittle, even at concentrations of as little as 0.6%. When the Gilchrist–Thomas process allowed to remove bulk amounts of the element from cast iron in the 1870s, it was a major development because most of the iron ores mined in continental Europe at the time were phosphorous. However, removing all the contaminant by fluxing or smelting is complicated, and so desirable iron ores must generally be low in phosphorus to begin with.

Aluminium

Small amounts of aluminium (Al) are present in many ores including iron ore, sand and some limestones. The former can be removed by washing the ore prior to smelting. Until the introduction of brick lined furnaces, the amount of aluminium contamination was small enough that it did not have an effect on either the iron or slag. However, when brick began to be used for hearths and the interior of blast furnaces, the amount of aluminium contamination increased dramatically. This was due to the erosion of the furnace lining by the liquid slag.

Aluminium is difficult to reduce. As a result, aluminium contamination of the iron is not a problem. However, it does increase the viscosity of the slag. This will have a number of adverse effects on furnace operation. The thicker slag will slow the descent of the charge, prolonging the process. High aluminium will also make it more difficult to tap off the liquid slag. At the extreme this could lead to a frozen furnace.

There are a number of solutions to a high aluminium slag. The first is avoidance; do not use ore or a lime source with a high aluminium content. Increasing the ratio of lime flux will decrease the viscosity.

Sulfur

Sulfur (S) is a frequent contaminant in coal. It is also present in small quantities in many ores, but can be removed by calcining. Sulfur dissolves readily in both liquid and solid iron at the temperatures present in iron smelting. The effects of even small amounts of sulfur are immediate and serious. They were one of the first worked out by iron makers. Sulfur causes iron to be red or hot short.

Hot short iron is brittle when hot. This was a serious problem as most iron used during the 17th and 18th centuries was bar or wrought iron. Wrought iron is shaped by repeated blows with a hammer while hot. A piece of hot short iron will crack if worked with a hammer. When a piece of hot iron or steel cracks the exposed surface immediately oxidizes. This layer of oxide prevents the mending of the crack by welding. Large cracks cause the iron or steel to break up. Smaller cracks can cause the object to fail during use. The degree of hot shortness is in direct proportion to the amount of sulfur present. Today iron with over 0.03% sulfur is avoided.

Hot short iron can be worked, but it has to be worked at low temperatures. Working at lower temperatures requires more physical effort from the smith or forgeman. The metal must be struck more often and harder to achieve the same result. A mildly sulfur contaminated bar can be worked, but it requires a great deal more time and effort.

In cast iron sulfur promotes the formation of white iron. As little as 0.5% can counteract the effects of slow cooling and a high silicon content. White cast iron is more brittle, but also harder. It is generally avoided, because it is difficult to work, except in China where high sulfur cast iron, some as high as 0.57%, made with coal and coke, was used to make bells and chimes. According to Turner (1900, pp. 200), good foundry iron should have less than 0.15% sulfur. In the rest of the world a high sulfur cast iron can be used for making castings, but will make poor wrought iron.

There are a number of remedies for sulfur contamination. The first, and the one most used in historic and prehistoric operations, is avoidance. Coal was not used in Europe (unlike China) as a fuel for smelting because it contains sulfur and therefore causes hot short iron. If an ore resulted in hot short metal, ironmasters looked for another ore. When mineral coal was first used in European blast furnaces in 1709 (or perhaps earlier), it was coked. Only with the introduction of hot blast from 1829 was raw coal used.

Ore roasting

Sulfur can be removed from ores by roasting and washing. Roasting oxidizes sulfur to form sulfur dioxide (SO2) which either escapes into the atmosphere or can be washed out. In warm climates it is possible to leave pyritic ore out in the rain. The combined action of rain, bacteria, and heat oxidize the sulfides to sulfuric acid and sulfates, which are water-soluble and leached out. However, historically (at least), iron sulfide (iron pyrite FeS
2
), though a common iron mineral, has not been used as an ore for the production of iron metal. Natural weathering was also used in Sweden. The same process, at geological speed, results in the gossan limonite ores.

The importance attached to low sulfur iron is demonstrated by the consistently higher prices paid for the iron of Sweden, Russia, and Spain from the 16th to 18th centuries. Today sulfur is no longer a problem. The modern remedy is the addition of manganese. But, the operator must know how much sulfur is in the iron because at least five times as much manganese must be added to neutralize it. Some historic irons display manganese levels, but most are well below the level needed to neutralize sulfur.

Sulfide inclusion as manganese sulfide (MnS) can also be the cause of severe pitting corrosion problems in low-grade stainless steel such as AISI 304 steel. Under oxidizing conditions and in the presence of moisture, when sulfide oxidizes it produces thiosulfate anions as intermediate species and because thiosulfate anion has a higher equivalent electromobility than chloride anion due to its double negative electrical charge, it promotes the pit growth. Indeed, the positive electrical charges born by Fe2+ cations released in solution by Fe oxidation on the anodic zone inside the pit must be quickly compensated / neutralised by negative charges brought by the electrokinetic migration of anions in the capillary pit. Some of the electrochemical processes occurring in a capillary pit are the same than these encountered in capillary electrophoresis. Higher the anion electrokinetic migration rate, higher the rate of pitting corrosion. Electrokinetic transport of ions inside the pit can be the rate-limiting step in the pit growth rate.

Anti-psychiatry

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