Optimization of technological parameters of manganese metal aluminothermic smelting

Abstract

In the paper using the mathematical model, the technology parameters of manganese metal smelting by aluminothermic method from manganese concentrate of chemical enrichment with the use of synthesized monophase material CaMnO3 are predicted. Based on thermal analysis and mathematical modeling data, the technology of manganese metal smelting was developed, including the preliminary preparation of charge materials to produce a synthetic material that contains the highest manganese oxide MnO2 and at the same time is an effective flux. With optimum proportions in the charge of monophasic material CaMnO3 and concentrate of chemical enrichment, it is possible to completely eliminate the use of fluorspar. The developed optimal technological regimes for out-of-furnace aluminothermic smelting of metallic manganese using monophase material CaMnO3 and concentrate of chemical enrichment made it possible to obtain a through-rate manganese recovery factor at the level 75-80%, which is almost twice as high as the through-extraction coefficient of manganese by the known technologies of manganese metal smelting.