摘要:
采用工业实践验证和统计方法对硅钢KR-BOF-RH-CC流程脱硫工艺进行分析。结果表明:提高KR脱硫渣扒渣率至98%以上,可显著降低铁水的回硫量;BOF全部采用优质自产废钢,禁加生铁块,吨钢冷固球团的加入量控制在15 kg,能够保证转炉终点[S]含量小于0.006%;RH脱硫能力较弱,RH脱硫率和脱硫剂消耗与合金化前[O]含量有关,钢液中[O]质量分数应小于450×10-6。通过采取提高KR脱硫率、控制硫来源和钢水中[O]含量等措施,使硅钢的[S]不合格炉数下降75%,RH脱硫剂消耗下降17.72%,取得了较好的冶金效果和市场效益。
Abstract:
The desulfurization of silicon steel in the course of KR-BOF-RH-CC process were analyzed by industrial practice verification and statistics. The results show that the resulfurization quantity of hot metal is lower when the rate of slag skimming increases above 98%. The combing measure of using high quality scrap steel,and free of iron piece addition,and 15 kg/t of cold-bound pellets ratio can guarantee the end [S] content of BOF less than 0.006%. The ability of desulfurization is weak in RH,the rate of RH desulfurization depends on the desulfurizer consumption and the [O] content before alloying. The [O] content should be controlled at less than 450 × 10-6 in the liquid steel. By increasing the rate of slag skimming,controlling sulfur source and the [O] content of molten steel,the unqualified rate of silicon steel due to [S] dropps by 75% and the desulfurizer consumption will decrease by 17.72%.
点击查看大图
下载:
