Smelting of Fe–Si–Mn–Al Complex Alloy Using High-Ash Coal

Nurumgaliyev A. Zayakin O. Zhuniskaliyev T. Kelamanov B. Mukhambetgaliyev Y.
November 2023 Springer

Metallurgist
2023 #67 Issue 7-8 1178 - 1186 pp.

Results of studies for preparing complex Fe–Si–Mn–Al master alloy are presented. High-silicon lean manganese ores of the West Kamys ore deposit (18–30% Mn and 35–45% SiO₂) and high-ash coal of the Saryadyr deposit (Kazakhstan) with an ash content of 45–55% are used as charge materials. Technological studies are conducted in an ore-thermal electric furnace with a capacity of 250 kVA. An experimental batch of master alloy with an average chemical composition is obtained, %: Mn — 20; Si — 42; Al — 16; P — 0.03; Fe balance. Dependences of aluminum, silicon and manganese content in final alloy on ratios Mn_ox + Fe_ox + SiO₂ + Al₂O₃)/C_so and Mn_ox/(Mn_ox + Fe_ox + SiO₂ + Al₂O₃) in an initial charge are revealed. The fundamental possibility and expediency of obtaining an aluminum silicon manganese master alloy of a new composition by a slag-free method with integrated use of all useful components of lean manganese ore and high-ash coal is demonstrated. An X-ray diffraction pattern of prototypes indicates that alloy phase composition is presented in the form of intermetallics — MnSi, Mn₁₅Si₂₆, Al₂Fe₃Si₄, Al₅Fe₂, FeSi, and structurally free silicon. The resulting master alloys of selected composition are not subject to self-dispersal reactions.

arc furnace , carbothermy , complex master alloy , high-ash coal , manganese ore , metallurgy

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Karaganda Industrial University, Temirtau, Kazakhstan
Institute of Metallurgy, Ural Branch of the Russian Academy of Science, Yekaterinburg, Russian Federation
Zh. Abishev Chemical and Metallurgical Institute, Karaganda, Kazakhstan

Karaganda Industrial University
Institute of Metallurgy
Zh. Abishev Chemical and Metallurgical Institute

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