CSP流程低碳铝镇静钢钙处理优化试验研究  

Experimental study on calcium treatment optimization of low carbon Al-killed steel in CSP process

作　　者：朱万军[1,2] 王春锋[3] 吴维轩[3] 区铁[2] 

机构地区：[1]武汉科技大学钢铁冶金及资源利用省部共建教育部重点实验室,湖北武汉430081 [2]武汉钢铁(集团)公司研究院,湖北武汉430080 [3]武汉钢铁(集团)公司条材总厂CSP分厂,湖北武汉430083

出　　处：《炼钢》2015年第5期21-26,共6页Steelmaking

摘　　要：为改善武钢CSP生产低碳铝镇静钢时钢水的可浇性,提高钢水洁净度,通过工业试验考察了不同钙处理条件下钢液成分及夹杂物变化情况,并结合热力学对钙处理效果进行了分析。试验结果表明,钙处理后,夹杂物主要为CaS含量较高的球状CaS-Al2O3-CaO复合夹杂,随着时间的延长,中包钢水中夹杂物转变为液态Al2O3-CaO夹杂和CaS含量较少的CaS-Al2O3-CaO复合夹杂。热力学分析表明,Al2O3夹杂物变性所需的Ca含量较低,钢中Al、S含量对液态夹杂生成有着重要影响;为较好的实现钙处理对夹杂物变性,应同时对钢中Ca、Al、S含量进行控制;且钙处理应保证中包钢水夹杂物为液态夹杂。In order to improve the cleanliness and castability of low carbon Al-killed steel for CSP production line of WISCO, the changes of composition and inclusions of molten steel with different calcium treatment were studied by industry trial. And the effects of calcium treatment were analyzed by thermodynamics. The results show that most inclusions are CaS-Al2O3-CaO with high mass fraction of CaS after calcium treatment. Then the inclusions become liquid Al2O3-CaO and CaS-Al2O3-CaO with low mass fraction of CaS in subsequent process. Thermodynamic study reveals that inclusions modification can be realized by low mass fraction of Ca, and the mass fraction of Al and S are the major factors influencing calcium treatment effects. So the mass fraction of Ca, Al and S should be considered together to realize inclusions modification during calcium treatment. And the inclusions in tundish should be liquid after calcium treatment.

关 键 词：低碳铝镇静钢 钙处理 夹杂物变性 CSP 热力学 

分 类 号：TF704.7[冶金工程—钢铁冶金]