石灰微观结构对铁水预处理脱硫的影响  

Effect of Microscopic Structure of Lime on Desulphurization of Pretreated Hot Metal

作　　者：郝华强[1] 任倩倩[1,3] 张玉柱[1,2] 郝素菊[2] 蒋武锋[2] 张卫攀 

机构地区：[1]东北大学材料与冶金学院,沈阳110004 [2]华北理工大学冶金与能源学院,现代冶金技术教育部重点实验室,唐山063009 [3]钢铁研究总院先进钢铁流程及材料国家重点实验室,北京100081

出　　处：《特殊钢》2016年第2期16-18,共3页Special Steel

基　　金：国家自然科学基金项目(51174075);河北省自然科学基金项目(E2012209024)

摘　　要：采用比表面积1.891~2.664 m^2/g和平均孔径575.5~814.9 nm四种不同结构的活性石灰在高真空电弧熔炼旋淬一体机中进行铁水预处理脱硫实验。用扫描电子显微镜分析不同石灰样品表面形貌,并用全自动压汞仪测量石灰的比表面积和平均孔径。实验结果表明铁水脱硫率随着石灰平均孔径的增大而减小,随着比表面积增大而提高;最佳脱硫剂配比为1:50。可将铁水中硫含量从0.014%脱至0.001%。The desulphurization test of pretreated hot metal using four different structure active limes with specific sur- face area 1. 891 - 2. 664 m^2/g and average pore diameter 575.5 - 814. 9 um is carried out in a high vacuum arc melting spinning quenching machine. The surface morphology of different lime sample is analyzed by scanning electron microscope and the specific surface area and the average pore diameter of lime are measured by a fully automatic mercury injection ap- paratus. Experimental results show that with increasing the average hole diameter, the desulphurization rate of hot metal de- creases and with increasing the specific surface area the desulphurization rate increases ; the optimum ratio of desulphuriza- tion agent is 1 ： 50, in this case the sulphur content in hot metal decreases to 0. 001% from 0. 014%.

关 键 词：铁水预处理 石灰 微观结构 脱硫率 脱硫剂配比 

分 类 号：TF704.3[冶金工程—钢铁冶金]