steelmaking method recycling of SiMn slag

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PURPOSE : A steel making method for recycling slag produced during manufacture of silicon-manganese alloy steel is provided to make steel using rare metal and valuable metal recovered from the slag.CONSTITUTION : According to a steel making method for recycling slag produced during manufacture of silicon-manganese alloy steel, slag(50) and MnO reductant produced during manufacture of silicon-manganese alloy steel is inserted into molten steel in a tapping process of an electric furnace(20) so that alloy elements containing Mn and Si included in the slag are reduced and recovered into the molten steel. The slag comprises MnO of 5-30weight%, SiO2 of 30-60weight%, Al2O3 of 10-30weight%, CaO of 10-30 weight%, MgO of 5-20weight%, and Fe and inevitable impurities of the remaining amount.[Reference numerals] (10) Iron scrap; (20) Electric furnace; (30) Ladle furnace; (40) Continuous casting; (50) Slag produced during making of Si-Mn alloy steel; (AA) Injection; (BB) TappingCOPYRIGHT KIPO 2013