CSP生产低碳铝镇静钢的钙处理  

Calcium treatment of low carbon aluminum killed steel produced by CSP process

作　　者：罗磊[1] 田志红[1] 赵长亮[1] 袁天祥[1] 

机构地区：[1]首钢京唐钢铁联合有限责任公司,河北唐山063200

出　　处：《钢铁研究学报》2015年第4期29-34,共6页Journal of Iron and Steel Research

摘　　要：通过对国内某钢厂CSP工艺生产的低碳铝镇静钢钙处理前后钢中夹杂物类型的变化研究,从热力学上分析了钢中Al2O3夹杂物的变性机理及夹杂物中wCaS较高的原因。同时,重点描述了钢中夹杂物不同类型的发展过程和夹杂物中CaS的存在形式。研究结果表明,钙处理后钢中镁铝尖晶石和钢中Ca、S元素会结合并相互扩散;且在现有工艺条件下,钢中wS过高使钢液钙处理后钢中原有的高熔点镁铝尖晶石夹杂物没有转变为低熔点夹杂物,同时也是钢中生成了大量CaS的主要原因;在现有工艺水平下,钢中wT[Ca]应控制在0.001 4%~0.002 8%较为合适。The variations of inclusion types in low carbon aluminum killed steel before and after calcium treatment were investigated. The modification mechanisms of Al2O3 and high levels of CaS were analyzed by thermodynam- ics. Meanwhile, the development process of inclusions in steel and existence forms of CaS in inclusions were also described. The results show that： magnesium aluminate spinels combine with Ca, S elements and mutual diffuse after calcium treatment; Al2O3 can not be modified into low melting point inclusions because of high sulfur in liq- uid steel, while majority of CaS are generated. Under the condition of the existing technological level, the calcium in steel should be controlled in 0. 0014%-0. 0028%.

关 键 词：夹杂物 钙处理 镁铝尖晶石 变性 

分 类 号：TF704.7[冶金工程—钢铁冶金]