黄铜矿的浸出及其动力学研究

为揭示黄铜矿的浸出规律,进行了黄铜矿矿物粒度、矿浆pH、矿浆浓度和NaCl浓度对铜浸出过程的影响,并对黄铜矿浸出动力学进行了研究。结果表明:1黄铜矿适宜的浸出粒度为38~75μm,矿浆pH=1,矿浆浓度为10 g/L,NaCl浓度为1 mol/L。2矿浆中NaCl的存在可以有效提高黄铜矿的浸出速度和浸出率,NaCl浓度不超过1mol/L的条件下,随着NaCl浓度的增大,这种促进效果越来越好。3在试验确定条件下,黄铜矿的浸出数据契合表面反应模型,即黄铜矿的浸出速率主要由矿物表面的反应速率决定。

Study on the Chalcopyrite Leaching and Its Kinetics

In order to reveal the regularity of chalcopyrite leaching,the effect of particle size,pulp pH,pulp density and NaCI concentration on chalcopyrite leaching was investigated,and its kinetics is researched.The result shows that:①the best leaching conditions were particle size at 38 ～ 75 μm,pH value 1 with a pulp density of 10 g/L,and NaCl concentration 1 mol/L.②The presence of NaCl in pulp effectively promoted the leaching speed and leaching rate.Under the concentration of NaCI concentration lower than 1 mol/L,the higher the NaCl concentration,the better the effect of promotion.③Under given conditions,the leaching data of chalcopyrite matched with the surface reaction model,that is,the leaching rate of chalcopyrite was mainly determined by the surface reaction speed of the minerals.