从复杂多金属硫化矿中提取铋的浸出动力学研究  

Leaching kinetics study on bismuth extraction from complex polymetallic sulfide ore

作　　者：陈锋[1] 

机构地区：[1]昆明有色冶金设计研究院股份公司,云南昆明650051

出　　处：《中国有色冶金》2017年第5期81-84,9,共5页China Nonferrous Metallurgy

摘　　要：研究了采用盐酸和氯化铁从低品位复杂多金属硫化矿中提取铋的浸出动力学。分析了反应时间、粒度及盐酸浓度对铋浸出率的影响,依据试验数据计算出浸出反应的表观活化能为31.32 kJ/mol。研究表明,收缩核模型可以描述盐酸浓度超过1 mol/L时的浸出过程,无论在产物层或边界流体膜,浸出率由一个扩散过程(抛物线浸出)控制,得出了相关的动力学方程。The leaching kinetics study on bismuth extraction from low-grade complex polymetallic sulfide ore with hydrochloric acid and ferric chloride is carried out. The impact of reaction time, particle size and HCl concentration on the leaching rate is determined. The apparent activation energy is 31.32 kJ/mol as calculated from the test data. The results show that the shrinking core model can describe the leaching process as HCl concentration is over 1.0 mol/L and the leaching rate is controlled by a diffusion process （parabolic leaching） whether in the product layer or boundary fluid film. Relevant leaching kinetics equation is obtained.

关 键 词：复杂多金属硫化矿 铋 浸出动力学 氯化铁 收缩核模型 

分 类 号：TF817[冶金工程—有色金属冶金]