关键词: 铝镇静钢, 还原渣, 浇余渣, AOD炉

Abstract: The characteristics of AOD furnace smelting stainless steel process were introduced in the present paper, and the reasons of large consumption of smelting slag and reductant were expounded. In order to reduce the material consumption of AOD furnace，combining with high melting point and low alkalinity of aluminum killed steel casting residue, casting residue was used to AOD furnace smelting process of stainless steel through adiusting the smelting technology and industrial test. The results showed that the aluminum killed steel casting residue could replace part of lime in AOD furnace reduction period, which could effectively solve the problom of chromium oxidization caused by heat insufficient in AOD furnace smelting process. The best usage of casting residue was 20~30 kg/t through data analysis and contrast, which could reduce the lime 10~15 kg/t, ferrosilicon 4~6 kg/t, fluorite 3~5 kg/t, and cost of per ton steel about 35 Yuan. The process energy consumption has fallen dramatically.

Key words: Al-killed steel, Reducing slag, Casting residue, Argon Oxygen Decarburization