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.

介绍了制备复杂 Fe-Si-Mn-Al 中间合金的研究结果。使用西卡梅斯矿床的高硅贫锰矿石（18-30% Mn 和 35-45% SiO ₂ ）和萨里亚德尔矿床（哈萨克斯坦）的灰分含量为 45-55% 的高灰分煤作为原料。充电材料。技术研究是在容量为250 kVA的矿热电炉上进行的。得到实验批次中间合金的平均化学成分，％：Mn—20；硅——42；阿尔——16；P——0.03；铁平衡。最终合金中铝、硅和锰含量对比率 Mn _ox + Fe _ox + SiO ₂ + Al ₂ O ₃ )/C _so和 Mn _ox /(Mn _ox + Fe _ox + SiO ₂ + Al ₂ O ₃ )的依赖性初步指控被揭露。论证了综合利用贫锰矿和高灰分煤各有用成分，采用无渣法获得新成分铝硅锰中间合金的根本可能性和便利性。原型的 X 射线衍射图表明，合金相成分以金属间化合物的形式存在 - MnSi、Mn ₁₅ Si ₂₆、Al ₂ Fe ₃ Si ₄、Al ₅ Fe ₂、FeSi 和结构游离硅。所得的选定成分的母合金不会发生自分散反应。