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

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Metallurgist Aims and scope

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 Mnox + Feox + SiO2 + Al2O3)/Cso and Mnox/(Mnox + Feox + 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.

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Authors and Affiliations

  1. Karaganda Industrial University, Temirtau, Kazakhstan

    A. Nurumgaliyev, T. Zhuniskaliyev & B. Kelamanov

  2. Institute of Metallurgy, Ural Branch of the Russian Academy of Science, Yekaterinburg, Russia

    O. Zayakin

  3. Zh. Abishev Chemical and Metallurgical Institute, Karaganda, Kazakhstan

    Y. Mukhambetgaliyev

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  1. A. Nurumgaliyev
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  2. O. Zayakin
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  3. T. Zhuniskaliyev
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  4. B. Kelamanov
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  5. Y. Mukhambetgaliyev
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Correspondence to A. Nurumgaliyev.

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Translated from Metallurg, Vol. 67, No. 8, pp. 84–89, August, 2023.

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Nurumgaliyev, A., Zayakin, O., Zhuniskaliyev, T. et al. Smelting of Fe–Si–Mn–Al Complex Alloy Using High-Ash Coal. Metallurgist 67, 1178–1186 (2023). https://doi.org/10.1007/s11015-023-01609-x

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