Possibility of Obtaining Low- and Medium-Carbon Ferromanganese from Ferrosilicomanganese Production Slags
Shevko V.M. Sinelnikov I.P. Aitkulov D.K. Udalov Y.P.
April 2025Springer
JOM
2025#77Issue 42473 - 2488 pp.
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.
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M. Auezov South Kazakhstan University, Shymkent, 160012, Kazakhstan
Department of Scientific Research, Republican State Enterprise “National Center on Complex Processing of Mineral Raw Materials of the Republic of Kazakhstan”, Almaty, 050036, Kazakhstan
St. Petersburg Technological Institute (Technical University), Saint Petersburg, 190013, Russian Federation
M. Auezov South Kazakhstan University
Department of Scientific Research
St. Petersburg Technological Institute (Technical University)
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