微波碳热还原转炉渣气化脱磷反应的宏观动力学  

Macrokinetics of gasification dephosphorization of converter slag by microwave carbon thermal reduction

作　　者：王艺慈[1] 李海洋[1] 罗果萍[1] 李双威 WANG Yi-ci LI Hai-yang LUO Guo-ping LI Shuang-wei(School of Material and Metallurgy, Inner Mongolia University of Science and Technology, Baotou 014010, Nei Mongol, China)

机构地区：[1]内蒙古科技大学材料与冶金学院,内蒙古包头014010

出　　处：《钢铁研究学报》2017年第2期93-97,共5页Journal of Iron and Steel Research

基　　金：国家自然科学基金资助项目(51364030);内蒙古高校重点研究资助项目(NJZZ16153);内蒙古自然科学基金资助项目(2014MS0533)

摘　　要：在1 100~1 350℃,1 000Pa,3倍碳当量条件下,采用微波加热方法对碳还原转炉钢渣的气化脱磷反应进行了宏观动力学分析。结果表明,微波加热条件下,气化脱磷率为31.0%~35.7%,该气化脱磷反应为二级反应,活化能为55.52kJ/mol,并得到了气化脱磷反应速率常数与温度的关系式,同时界面化学反应为可能的限制性环节。通过提高反应温度、减小钢渣及焦炭粒度、增大反应物料接触面积,可提高气化脱磷反应的速率。研究结果为探明微波碳热还原脱磷反应的机理及速率问题,实现转炉钢渣在钢铁企业内部的循环利用提供了理论依据。Under the condition of 1 100-1 350 ℃,1 000 Pa,and carbon equivalence of 3times,the macrokinetics of gasification dephosphorization for converter slag was studied by microwave heating.The results show that the gasification dephosphorization rate is 31.0%-35.7%,the reaction order of gasification dephosphorization is 2,and the reaction activation energy is 55.52kJ/mol.So the interfacial chemical reaction is the possible restrictive step for gasification dephosphorization,and the relationship between chemical reaction rate constant and temperature is obtained by dynamic analysis method.The gasification dephosphorization rate can be improved by increasing the temprature,reducing particle size of slag or coke,and increasing contacting area of the reaction materials.The results make mechanism and rate of gasification dephosphorization clear and provide theoretical basis for recycling of converter slag in iron and steel enterprises.

关 键 词：钢渣 微波加热 气化脱磷 宏观动力学 

分 类 号：X757[环境科学与工程—环境工程]