石煤钠化焙烧料酸浸动力学  

Kinetics of leaching vanadium with acid from sodium roasting calcine of stone coal

作　　者：何东升[1] 冯其明[1] 张国范[1] 欧乐明[1] 卢毅屏[1] 

机构地区：[1]中南大学资源加工与生物工程学院,长沙410083

出　　处：《北京科技大学学报》2008年第9期977-980,共4页Journal of University of Science and Technology Beijing

摘　　要：研究了石煤钠化焙烧料硫酸浸出过程中,浸出剂初始浓度、搅拌速度和浸出温度对浸出率的影响,并对浸出过程动力学进行了分析.结果表明:浸出剂初始浓度和浸出温度对钒浸出率有显著影响,搅拌速度对钒浸出率影响不大;该浸出过程符合核收缩模型,与化学反应控制动力学方程式相吻合,浸出反应的表观活化能为50.88 kJ.mol-1,浸出过程控制步骤为化学反应控制.The effects of initial sulfuric acid concentration, stirring speed, and leaching temperature on leaching rate in the process of leaching vanadium with sulfuric acid from sodium roasting calcine of stone coal were investigated. The results show that initial sulfuric acid concentration and leaching temperature affect vanadium leaching rate apparently, and stirring speed nearly have rio effect on the leaching rate. The leaching process can be modeled with the shrinking core model, and the kinetics of the reaction is successfully described by the kinetics equation of chemical reaction control. The kinetic apparent activation energy E has been calculated as about 50.88 kJ·mol^-1, which indicates that the leaching process is controlled by surface chemical reaction.

关 键 词：石煤 焙烧 浸出 动力学 表观活化能 

分 类 号：TF803.2[冶金工程—有色金属冶金] TF841.3