钢渣用作燃煤固硫剂的性能研究  

Study on the properties of steel slag used as sulfur fixation agent in coal burning

作　　者：赵建兵[1] 杨巧文[1] 温馨 田利斌 Zhao Jianbing;Yang Qiaowen;Wen Xin;Tian Libin(School of Chemical and Environmental Engineering,China University of Mining and Technology-Beijing,Beijing 100083,China)

机构地区：[1]中国矿业大学(北京)化学与环境工程学院,北京100083

出　　处：《矿业科学学报》2022年第5期624-631,共8页Journal of Mining Science and Technology

基　　金：北京市科技计划资助项目(Z161100002616038);中央高校基本科研业务费专项资金(2020YJSHH24)。

摘　　要：为研究燃煤固硫过程中钢渣的固硫性能,分析了固硫过程的工艺参数钙硫比、空气流量、炉温、炉内停留时间等单因素对固硫率的影响,并设计正交实验分析各因素对固硫率主次顺序的影响,确定了最优实验参数。使用X射线荧光光谱仪(XRF)分析了灰渣的结渣性和钢渣的固硫效果;应用X射线衍射光谱仪(XRD)表征了钢渣与固硫灰渣的衍射峰,进一步反映了钢渣的固硫性能;采用扫描电镜(SEM)表征了固硫灰渣的显微形貌,比较了钢渣固硫前后的表面结构和微观形貌,验证了其他表征结果的合理性。结果表明,钢渣在900℃高温下具有较好的固硫性能,固硫率达到63.17%,加入2%碳酸钠助剂后钢渣的固硫率可以达到70.08%。In order to research the sulfur fixation performance of steel slag in the coal-fired sulfur fixation process,the effect of single parameters such as calcium-sulfur ratio,air flow rate,furnace temperature,and furnace residence time on the sulfur fixation efficiency was studied.In addition,orthogonal experiments were constructed to assess the effect of each variable on the main and secondary order of sulfur fixation efficiency,and the ideal experiment design was identified.Utilizing XRF,the slagging features of the ash and the sulfur-fixing effect of the steel slag were analyzed.XRD was utilized to characterize the diffraction peaks of steel slag and sulfur fixation slag,which indicated the steel slag􀆳s capacity to fixate sulfur.SEM was used to describe the microscopic morphology of sulfur fixing ash,and the surface structure and microscopic morphology of steel slag before and after sulfur fixing were compared to evaluate the validity of other characterisation results.The results suggest that the slag has a good sulfur fixation capacity at 900℃,with a sulfur fixation efficiency of 63.17%,and that the sulfur fixation efficiency of the slag may reach 70.08%when 2%Na_(2)CO_(3) is added.

关 键 词：钢渣 固硫剂 固硫率 实验参数 正交实验 

分 类 号：TQ534[化学工程—煤化学工程]