缓冲体系中辉钼矿电氧化浸出研究  

Investigation on electric-oxidation of molybdenite concentrate in buffer system

作　　者：曹占芳[1] 钟宏[1] 邱朝辉[1] 符剑刚[1] 刘广义[1] 王帅[1] 

机构地区：[1]中南大学化学化工学院,湖南长沙410083

出　　处：《现代化工》2009年第S1期16-18,共3页Modern Chemical Industry

基　　金：国家"十一五"科技支撑项目"德兴铜矿资源高效利用技术研究"(2007BAB22B01);国家自然科学基金(50704036)资助项目

摘　　要：主要对缓冲体系中辉钼矿电氧化浸出行为进行了考察,最优的浸出工艺参数为液固比25∶1,搅拌速度400r/min,NaCl浓度4mol/L,Na2CO3浓度10g/L,pH=9,室温,Mo浸出率可达到99.5%,且电流效率达到61%,而非缓冲体系电流效率仅为39%;浸出动力学表明,浸出过程表观活化能为8.56kJ/mol,反应界面有固体产物生成,过程受固膜扩散控制。The dissolution of molybdenite concentrate in buffer system has been investigated.When the liquid-solid ratio is 25,mixing rate,400 r/min,pH=9(initialization),room-temperature,concentration of NaCl,4 mol/L,concentration of Na2CO3,10 g/L,then the leaching rate of Mo can achieve 99.5% and the current efficiency at 61%,correspondingly current efficiency at 39% in non-buffer system.The test results prove that the dissolution of molybdenite concentrate is represented by shrinking core model with diffusion through a porous product layer of sulphur under alkaline conditions,the apparent activation energy (Ea) for the dissolution reaction is calculated as 8.56 kJ/mol.

关 键 词：辉钼矿 电氧化 湿法浸出 动力学 电解 

分 类 号：TF841.2[冶金工程—有色金属冶金]