铝酸钙系RH精炼脱硫的动力学分析与实践  

Dynamic analysis and practice for the RH desulphurization with calcium aluminate flux

作　　者：陈玉鑫 孙亮[2] 陈峰 曹仁峰 CHEN Yuxin;SUN Liang;CHEN Feng;CAO Renfeng(IMERYS(China)Co.Ltd.,Beijing 100028,China;Steel Dept.,Beijing Shougang Holdings Co.Ltd.,Tangshan 064404,China)

机构地区：[1]益瑞石(中国)有限公司,北京100028 [2]北京首钢股份有限公司炼钢部,河北唐山064404

出　　处：《电工钢》2021年第2期32-39,共8页ELECTRICAL STEEL

摘　　要：基于某厂现用的CaO-CaF_(2)体系脱硫剂目前存在的侵蚀和保存不良问题,采用了铝酸钙脱硫工艺,并进行了工业试验,利用试验数据对深脱硫的可能性进行了进一步的探讨。根据对脱硫剂的渣-钢间硫分配比、熔化速度和RH炉真空室残渣的影响分析,铝酸钙脱硫剂的Al_(2)O_(3)设计为33%~37%;铝酸钙体系RH炉脱硫剂的最佳粒度范围为3~5mm。工业试验表明,脱硫效果与脱硫剂加入量和初始硫含量呈线性关系。通过回归分析,当钢液中初始硫质量分数低于30×10^(-6)时,深脱硫的成功率是比较高的,但当初始硫质量分数高于30×10^(-6)时,深脱硫的成功率很低,即便大幅度增加脱硫剂加入量也效果不佳。铝酸钙体系脱硫剂相对于CaO-CaF_(2)体系脱硫剂,合金收得率有所提高。Calcium aluminate desulphurization flux for RH process was designed to avoid the corrosion and storage problem of CaO-CaF_(2) flux.The Al_(2)O_(3) content was set a range of 33%-37%in accordance with slag-steel sulphur ratio and melting time,the residual slag inside chamber was also taken into consideration.The optimized range of particle size was between 3-5 mm.The flux was put into production trials and the result was evaluated.It was concluded that the desulphurizing effect had a strong correlation with initial sulphur content and volume of flux addition.The regression analysis showed that deep desulphurization is easier to be achieved if the initial sulphur content is lower than 30×10^(-6),or it will be much harder on the contrary.Compared to CaO-CaF_(2) flux,the alloy yield has been improved when using calcium aluminate desulphurization flux.

关 键 词：铝酸钙 RH精炼 脱硫 脱硫动力学分析 

分 类 号：TF777.1[冶金工程—钢铁冶金]