含锌粉尘团块脱锌行为研究  

Research on dezincification of zinc-bearing dusts composite briquettes

作　　者：陈子罗 张建良[1] 刘征建[1] 袁骧[1] 王飞[1] 刘依然[1] 高斌[1] 

机构地区：[1]北京科技大学冶金与生态工程学院,北京100083

出　　处：《中南大学学报（自然科学版）》2017年第7期1704-1711,共8页Journal of Central South University:Science and Technology

基　　金：国家自然科学基金资助项目(U1260202)~~

摘　　要：通过正交实验分析焙烧温度、碳氧物质的量比、水分质量分数、碱度和CO_2体积分数5个关键因素对含锌粉尘的脱锌过程的影响,利用热力学软件Factsage计算分析实验温度范围内锌、铁的还原优势,并且通过扫描电镜(SEM)和X线衍射分析(XRD)Zn和Fe元素在焙烧过程中的还原行为。研究结果表明:温度是影响脱锌率最主要的因素,脱锌率随着温度的升高而显著增加。达到1 200℃时Zn单质几乎能和Fe单质同时被还原出来。脱锌的最佳工艺参数如下:温度为1 200℃,碳氧物质的量为1.0,水分质量分数为10%,碱度为2.0,CO_2体积分数为65%,在此最佳工艺条件下团块脱锌率达到82.66%。Based on the orthogonal experiment, the effects of roasting temperature, molar ratio of carbon to oxygen, mass fraction of water, binary basicity and CO_2 volume fraction on the dezincification of zinc-bearing dusts briquettes were studied. The predominancearea of Zn and Fe were calculated by Factsage. The reduction behavior of Zn and Fe was analyzed by scanning electron microscope（SEM） and X-Ray Diffraction（XRD）. The results show that roasting temperature is the most important factor of the dezincification, and the higher temperature, the higher dezincification rate. At 1 200 ℃, Zn and Fe can be reduced at the same time. The optimal parameters are roasting temperature of 1 200 ℃, molar ratio of C to O of 1.0, mass fraction of water of 10%, binary basicity of 2.0 and CO_2 volume fraction of 65%, and under this condition the dezincification ratio reaches 82.66%.

关 键 词：含锌粉尘 脱锌 正交实验 还原 热力学 

分 类 号：TF556[冶金工程—钢铁冶金]