含锌废渣及贫杂锌矿的碱浸动力学研究  

Kinetic Study on Alkaline Leaching of Waste and Lean Ores Bearing Zinc

作　　者：张承龙[1] 赵由才[2] 

机构地区：[1]上海第二工业大学城市建设与环境工程学院,上海201209 [2]同济大学污染控制与资源化研究国家重点实验室,上海200092

出　　处：《有色金属（冶炼部分）》2010年第3期10-12,共3页Nonferrous Metals（Extractive Metallurgy)

基　　金：上海高校选拔培养优秀青年教师科研专项基金资助(egd08009);上海第二工业大学科技发展基金项目资助

摘　　要：研究了含锌废渣及贫杂锌矿在碱浸过程中的动力学。结果表明,含锌废渣(ZnO)在碱溶液中的浸出过程符合关系式1-(1-η)13=kt,表观活化能为49.22 kJ/mol,说明浸出过程受化学控制;贫杂锌矿(ZnCO3)在碱溶液中的浸出过程可分为两段,在开始段时间内,1-(2/3)η-(1-η)2/3与浸出时间呈直线关系,活化能为19.95 kJ/mol;而在6 min以后则是1-(1-η)13与浸出时间呈直线关系,活化能为46.54 kJ/mol。说明在开始时间段内是受内扩散控制,而随后的浸出过程是受化学反应控制。The leaching reaction kinetics of waste bearing zinc and smithsonite in alkaline solution were studied.For waste bearing zinc,plot of 1-（1-η）13 versus leaching time giving linear relationship indicated that the velocity of leaching was controlled by the chemical reaction step,the apparent activation energy was obtained to be 49.22 kJ/mol from an Arrhenius plot.For smithsonite,during the early stage of leaching reaction,1-（2/3）η-（1-η）2/3 was linear with leaching time,with the apparent activation energy of 19.95 kJ/mol;while in the later stage,1-（1-η）13 was linear with leaching time,with the apparent activation energy of 46.54 kJ/mol.Thus,it indicated that the leaching mechanism of smithsonite changes from inner diffusion control to chemical reaction control.

关 键 词：含锌废渣 贫杂氧化锌矿 碱浸 动力学 

分 类 号：TF813[冶金工程—有色金属冶金]