难选氧化锌矿氨浸动力学  

Kinetics of Leaching Poorly-floated Zinc-oxide-ore with Ammonia

作　　者：朱云[1] 胡汉[1] 苏云生[1] 杨保民[1] 

机构地区：[1]昆明理工大学材料与冶金工程学院,云南昆明650093

出　　处：《过程工程学报》2002年第1期81-85,共5页The Chinese Journal of Process Engineering

基　　金：云南省科学基金资助项目(编号:2000E0027M)

摘　　要：兰坪氧化锌矿氨浸的动力学实验表明,氧化锌矿的氨浸动力学遵从不生成固体产物层的未反应核缩减模型,即符合1(1a)1/3=[MkCn/(brd0)]t方程. 通过研究氨水的浓度、温度以及矿石粒度对难选氧化锌矿浸出速率的影响,发现氧化锌矿氨浸反应为一级反应,得到反应的活化能为11.1 kJ/mol,为边界层扩散控制.Tests indicate that the kinetics of leaching poorly-floated zincoxideore with ammonia comply with the shrinking un-reacted core model without solid product. By investigating the effects of ammonia concentration, temperature and size of ore on the leaching rate, it was suggested that the leaching of poorly-floated zinc-oxide-ore with ammonia is one of the first order reaction. Its activation energy is 11.1 kJ/mol, indicating that the external mass transfer was the rate controlling step.

关 键 词：氧化锌矿 氨浸 动力学 一级反应 活化能 

分 类 号：TF813[冶金工程—有色金属冶金]