铁水钙铝复合脱硫的机理分析及研究  

Study on the Desulfurization of Hot Metal with Composite Reagent of Calcium Oxide and Aluminum

作　　者：魏国[1] 孙瑜[1] 何奕波[1] 沈峰满[1] 

机构地区：[1]东北大学材料与冶金学院,辽宁沈阳110819

出　　处：《东北大学学报（自然科学版）》2012年第12期1737-1740,共4页Journal of Northeastern University(Natural Science)

基　　金：国家自然科学基金钢铁联合研究基金资助项目(51074206)

摘　　要：向铁水中加入Al可降低铁水中氧而促进脱硫反应,同时改善脱硫动力学条件.为降低脱硫成本,对钙铝复合脱硫的机理和效果进行了研究.试验结果证实:在CaO基脱硫剂中加入适量铝粉,通过钙铝复合脱硫可以提高CaO的脱硫率;Al添加量为5.0 g/kg时,脱硫率比单独使用CaO提高31.4%.Al添加量为0.6 g/kg时,20 min内可将铁水中硫含量降低到0.02%以下.通过计算,得到了不同Al添加量下的脱硫速率常数.Al addition can not only promote the desulfurization by deoxidation in the hot metal,but also improve the kinetic conditions of desulfurization with lime.To reduce the cost of desulfurization treatment,theoretical and experimental studies have been conducted for hot metal desulfurization with composite reagent of calcium oxide and aluminum.The experiment results show that,with the addition of a certain amount Al in CaO-based desulfurizer,the desulfurization rate can be improved.With 5 g/kgFe Al addition,the desulfurization ratio can be increased by 31.4%.With 0.6 g/kgFe Al addition,the sulfur content in hot metal can be reduced to below 0.02% within 20 min.The rate constant of desulfurization reaction was also calculated for different amounts of Al addition.

关 键 词：铁水预处理 脱硫剂 复合脱硫 脱硫率 脱硫速率 

分 类 号：TF535.2[冶金工程—钢铁冶金]