CSP生产低碳高铝钢钙处理与可浇性的控制  

Calcium Treatment and Control of Castability in Low Carbon Aluminum Killed Steel Produced by CSP Process

作　　者：马志飞[1] 孙彦辉[1] 孙赛阳[1] 殷雪[1] 蔡开科[1] 

机构地区：[1]北京科技大学冶金与生态工程学院,北京100083

出　　处：《钢铁研究学报》2014年第6期17-22,共6页Journal of Iron and Steel Research

基　　金：国家自然科学基金资助项目(51274032)

摘　　要：系统研究了国内某钢厂CSP生产的低碳铝镇静钢钙处理前,钙处理后成分、尺寸和类型的变化,从热力学上分析铝脱氧钢中Al2O3夹杂物变性机制及夹杂物中CaS合理控制的条件,并对钙处理后钢水可浇性进行了研究,研究发现,现有工艺条件下钢中[Ca]的质量分数为0.002 6%~0.003 5%较合适,最佳喂钙线长度在284~386m,此时夹杂物中CaS的质量分数在7%以下,且无单独CaS析出,SEN连浇15炉以上。A investigation was carried on the variations of inclusion size,types and composition in low carbon aluminum killed steel before and after calcium treatment.The modification mechanism of alumina and the condition of precipitation calcium sulfide was analyzed by thermodynamics.Additionally,the control of castbility was studied.The study reveals that the optimum calcium content should be 26×10-6-35×10-6,the optimum CaSi wires should be 284-386m,the percentage of CaS should be below 7%,but without precipitation of CaS.

关 键 词：钙处理 钙铝酸盐 硫化钙 可浇性 变性 

分 类 号：TF703[冶金工程—钢铁冶金]