Abstract: According to the process model of AOD furnace smelting stainless steel,the process of desulfurizing molten iron in AOD furnace was developed to meet the supply of desulfurizing molten iron after the failure of desulfurizing equipment.The practice shows that the sulfur mass fraction can be removed to below 0.002 0 % by desulfurization of molten iron in AOD furnace.In order to improve desulfurization efficiency,the end temperature of molten iron desulfurization was controlled at 1 350-1 400 ℃,and the shortage of temperature was made up by ferrosilicon.The slag quantity was 20-30 kg/t,the mass fraction of silicon after reduction was controlled at 0.2 %-0.4 %,and the side blowing agitation intensity was controlled at 0.4-0.6 m3/(t·min) in the reduction stage,and the stirring time was 5 min.

Key words: AOD furnace;desulfurization of molten iron, reduction, slag basicity