Abstract
The purpose of the work is the substantiation and development of technological solutions for smelting metallic manganese and its alloys based on the duplex technology "arc electric steel-smelting furnace-converter of gas-oxygen refining." Methods: thermodynamic analysis by stage reactions and phase transformations of starting substances involved in chemical reactions; laboratory and industrial research; chemical analysis. Scientific innovation: when converting low-phosphorous manganese slag and involving recycled silicomanganese, the possibility of obtaining metallic manganese is shown when pulverized lime is introduced during blowing. The possibility of smelting low-carbon ferromanganese and metallic manganese in the converter of gas-oxygen refining by the silicothermal method is substantiated. Practical value: In semi-industrial and industrial gas-oxygen refining converters, technologies for obtaining low- and medium-carbon ferromanganese and metallic manganese by the silicothermal method and blowing high-carbon ferromanganese with gaseous oxygen have been tested. The silicothermal method provided high productivity, ease of metallurgical redistribution, high manganese extraction, minimal manganese "hits" with evaporation and transition of manganese to slag.
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