顶底复吹转炉出钢面炉衬维护技术的试验研究  

Experimental Study on Lining Maintenance Technology for Tapping Surface of Top and Bottom Combined Blowing Converter

作　　者：潘军[1] 赵滨 张文英 刘威 Pan Jun;Zhao Bin;Zhang Wenying;Liu Wei(Long Product Division of Maanshan Iron&Steel Co.,Ltd)

机构地区：[1]马鞍山钢铁股份有限公司长材事业部

出　　处：《宽厚板》2023年第4期31-35,共5页Wide and Heavy Plate

基　　金：国家重点研发计划(2021YFB3401003)。

摘　　要：为控制转炉合理炉型和提高出钢面炉衬使用寿命,分别研究了终渣碱度、渣中w(MgO)以及渣中w(FeO)对终渣熔点的影响。通过对固渣护炉炉次终渣成分的调整和固渣护炉过程操作的优化,有效提高固渣护炉后转炉出钢面炉衬的使用寿命,降低护炉耐材成本。实践表明:转炉终点w(C)控制在0.08%~0.12%,终渣碱度控制在3.0~3.5,渣中w(MgO)控制在6%~8%,渣中w(FeO)控制在10%~15%,转炉固渣护炉炉次出钢面炉衬耐侵蚀性达到最佳,转炉出钢面炉衬每月维护频次均值由28次下降至16次,吨钢耐材用量降低20.27%,综合效益显著。In order to control rational furnace type and improve the service lifetime of tapping surface lining for the converter,the effects of endpoint basicity,w(MgO)and w(FeO)in the slag on the melting point of the endpoint slag are studied.The service lifetime of tapping surface lining after converter slag fixing and protecting operation is effectively improved and the cost of protected refractory is reduced by trimming the endpoint slag composition of heats with slag fixing and protecting operation and optimizing slag fixing and protecting operation.The practice shows that the w(C)at converter endpoint is controlled to the values ranging from 0.08%to 0.12%,the basicity of endpoint slag is controlled to the values between 3.0 and 3.5,the w(MgO)in the slag is controlled to the values between 6%and 8%,the w(FeO)in the slag is controlled to the values between 10%and 15%,the corrosion resistance of tapping surface lining for the converter heats with slag fixing and protecting operation is optimized,the average fixing frequency per month of tapping surface lining is reduced from 28 to 16,the refractory consumption per ton of molten steel is reduced by 20.27%with sinificant comprehensive benefits.

关 键 词：顶底复吹转炉 炉渣熔点 出钢面炉衬 炉渣成分 维护操作 

分 类 号：TF713[冶金工程—钢铁冶金]