工程科学学报2017，Vol.39Issue(3)：377-382,6.DOI:10.13374/j.issn2095-9389.2017.03.009
硫氧混合铅锌矿中锌的氧化氨浸动力学
Oxidative ammonia leaching kinetics of zinc extracted from mixed sulfide-oxide lead and zinc ore
摘要
Abstract
The leaching experiments of zinc from mixed sulfide-oxide lead and zinc ore were performed in NH3-( NH4 ) 2 SO4 solu-tion with ammonium persulfate as an oxidant under atmospheric pressure and relatively low temperature. The effects of stirring speed, lixiviants, oxidant concentration and reaction temperature on the leaching rate of zinc were studied. The results show that under the op-timal conditions, the leaching rate of zinc can reach 93. 2%, and nearly no other metal ions enter into lixivium during the leaching process, which shows that this ammoniacal leaching system has a high efficiency and selectivity. This is significant to simplify the fol-lowing purification process and product preparation process. Leaching kinetics indicates that the oxidative leaching of zinc could be re-presented by a shrinking core model with product layer diffusion and the activation energy for the dissolution reaction is calculated as 17. 89 kJ·mol-1 .关键词
铅锌矿处理/过硫酸铵/浸出动力学/选择性Key words
lead zinc ore treatment/ammonium persulfate/leaching kinetics/selectivity分类
矿业与冶金引用本文复制引用
贾楠楠,王会刚,郭敏,张梅..硫氧混合铅锌矿中锌的氧化氨浸动力学[J].工程科学学报,2017,39(3):377-382,6.基金项目
国家重点基础研究发展规划资助项目(2014CB643401, 2013AA032003) （2014CB643401, 2013AA032003）
国家自然科学基金资助项目(51372019) （51372019）
