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结合冶炼无取向硅钢的生产实际,对钢中硫的来源,以及炉渣性质、钢水温度、底吹强度对脱硫的影响进行了分析。研究表明,转炉钢中硫的主要来源为铁水、废钢、铁水渣及石灰带入;冶炼硅钢时,终渣碱度为3.0~3.5,w((FeO))≤20%,终点钢水温度大于等于1 680℃,加大底吹搅拌强度能提高转炉脱硫效果。硅钢平均出钢硫的质量分数为0.004 8%,能满足无取向硅钢对硫含量的要求。
Combined with the actual production of non-oriented silicon steel smelting, the source of sulfur in steel, as well as the nature of the slag, the temperature of molten steel, the bottom blowing strength of the desulfurization were analyzed. The results show that the main sources of sulfur in the converter steel are hot metal, scrap steel, molten iron slag and lime. When smelting silicon steel, the final slag basicity is 3.0-3.5, w ((FeO)) ≤20%, the final molten steel temperature is greater than or equal to 1 680 ℃, increase the mixing strength at the end of blowing can improve the converter desulfurization effect. The average mass fraction of silicon steel output of 0.004 8%, to meet the non-oriented silicon steel sulfur content requirements.