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<p>We present the results of studies of the possibility of obtaining low-carbon ferromanganese by silicothermic reduction of ferrosilicomanganese production slags using ferrosilicomanganese. The studies were conducted by thermodynamic modeling using the HSC-6.0 software package based on the principle of minimum Gibbs energy. Thermodynamic modeling was carried out using ferrosilicomanganese production slag containing, %: MnO 12.85; SiO<sub>2</sub> 43.16; CaO 17.75; BaO 5.23; MgO 2.05; Al<sub>2</sub>O<sub>3</sub> 12.91; Na<sub>2</sub>O 0.86; K<sub>2</sub>O 3.50; and TiO<sub>2</sub> 0.57. It was found that, under equilibrium conditions, the formation of ferromanganese grades from slags occurs in the presence of MnC22, MnC17, and MnC12 grades ferrosilicon manganese at a temperature of more than 1300&#xa0;°C. When using MnC22 grade ferrosilicon manganese in the temperature range of 1300–1900&#xa0;°C, the formation of ferromanganese depends on the amount of ferrosilicon manganese: at 12–13.7% MnC22, FMn90 grade ferromanganese is formed, at 13.1–14.7%, FMn88 grade, and at 14.4–16%, FMn78 grade. Using MnC17 grade ferrosilicon manganese, ferromanganese of the three grades is formed: FMn90 (1300–1820&#xa0;°C and 16–18.7% ferrosilicon manganese); FMn88 (1300–1900&#xa0;°C and 16–20% ferrosilicon manganese), and FMn78 (1360–1900&#xa0;°C and 18.2–20% ferrosilicon manganese). In the presence of 22–28% MnC12 grade ferrosilicon manganese, FMn90 grade ferromanganese is formed at 1300–1625&#xa0;°C, FMn88 grade at 1303–1900&#xa0;°C, and FMn78 grade at 1580–1900&#xa0;°C. By electric smelting of slags from the Taraz Metallurgical Plant together with MnC12, a ferroalloy was obtained that corresponds in manganese content (75.2%) to low-carbon FMn78 grade ferromanganese.</p>

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Possibility of Obtaining Low- and Medium-Carbon Ferromanganese from Ferrosilicomanganese Production Slags

  • 期刊论文

  • 发表日期：

    2025年2月12日

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  • Viktor M. Shevko,
  • Ivan P. Sinelnikov,
  • Dosmurat K. Aitkulov,
  • Yuriy P. Udalov

摘要

We present the results of studies of the possibility of obtaining low-carbon ferromanganese by silicothermic reduction of ferrosilicomanganese production slags using ferrosilicomanganese. The studies were conducted by thermodynamic modeling using the HSC-6.0 software package based on the principle of minimum Gibbs energy. Thermodynamic modeling was carried out using ferrosilicomanganese production slag containing, %: MnO 12.85; SiO2 43.16; CaO 17.75; BaO 5.23; MgO 2.05; Al2O3 12.91; Na2O 0.86; K2O 3.50; and TiO2 0.57. It was found that, under equilibrium conditions, the formation of ferromanganese grades from slags occurs in the presence of MnC22, MnC17, and MnC12 grades ferrosilicon manganese at a temperature of more than 1300 °C. When using MnC22 grade ferrosilicon manganese in the temperature range of 1300–1900 °C, the formation of ferromanganese depends on the amount of ferrosilicon manganese: at 12–13.7% MnC22, FMn90 grade ferromanganese is formed, at 13.1–14.7%, FMn88 grade, and at 14.4–16%, FMn78 grade. Using MnC17 grade ferrosilicon manganese, ferromanganese of the three grades is formed: FMn90 (1300–1820 °C and 16–18.7% ferrosilicon manganese); FMn88 (1300–1900 °C and 16–20% ferrosilicon manganese), and FMn78 (1360–1900 °C and 18.2–20% ferrosilicon manganese). In the presence of 22–28% MnC12 grade ferrosilicon manganese, FMn90 grade ferromanganese is formed at 1300–1625 °C, FMn88 grade at 1303–1900 °C, and FMn78 grade at 1580–1900 °C. By electric smelting of slags from the Taraz Metallurgical Plant together with MnC12, a ferroalloy was obtained that corresponds in manganese content (75.2%) to low-carbon FMn78 grade ferromanganese.