铜熔炼烟灰中Cu、Zn元素浸出试验研究

在原材料化学成分和物相组成分析的基础上，对微波辅助浸出某铜含量为12.67%、锌含量为9.85%的铜熔炼烟灰中Cu、Zn元素的可行性进行了研究。考察了硫酸浓度、液固比、浸出温度和浸出时间对Cu、Zn浸出率的影响，结果显示，在硫酸浓度为5 mol/L、液固比为10 mL/g、浸出温度80 ℃、浸出时间2 h条件下，铜、锌浸出率分别为95.11%、95.92%。对浸渣分析表明，浸渣主要为残余的碳及铁硅酸盐，铁酸铜、铁酸锌经硫酸浸出后生成磁铁矿，浸渣中部分大颗粒碎裂成较小颗粒，且颗粒表面有裂缝和孔产生，浸渣疏松多孔。

Research on Leaching of Copper and Zinc from Copper-Smelting Dust

Based on the analysis of chemical composition and phase composition of raw materials， the feasibility of microwave-assisted leaching of Cu and Zn in copper smelting dust with copper content 12.67% and zinc content 9.85% was studied. The effects of sulfuric acid concentration， liquid-solid ratio， leaching temperature and leaching time on the leaching rates of Cu and Zn were investigated. The results showed that the leaching rates of copper and zinc were 95.11% and 95.92% respectively under the conditions of sulfuric acid concentration of 5 mol/L， liquid-solid ratio of 10 mL/g， leaching temperature of 80 ℃， and leaching time of 2 h.The analysis of leaching slag shows that the leaching slag mainly consists of residual carbon and iron silicate， after leaching by sulfuric acid， copper ferrite and zinc ferrite and magnetite istranslated into magnetite. Some of the large particles in the leaching slag break into smaller particles， and there are cracks and holes on the surface of the particles， and the leaching slag is loose and porous.