锌电解阳极泥氧化亚铁离子的工艺研究

Study on ferrous ions oxidation by zinc electrolytic anode slime

文中采用主要成分为MnO2的锌电解阳极泥氧化锌焙砂浸出液中的亚铁离子,达到除铁的目的。研究了锌电解阳极泥氧化亚铁离子过程中的反应温度、反应时间、搅拌速度、阳极泥粒径、液固比等工艺条件对亚铁离子氧化率的影响。实验结果表明,在反应温度为85℃、反应时间为60 min、搅拌速度为500 r/min、阳极泥粒径为0.154 mm、液固比为14∶1(单位:mL/g)的较优工艺条件下,亚铁离子的氧化率高达99.80%。此工艺使锌冶炼企业产生的电解阳极泥得到了高效利用,不仅充分利用了资源、降低了生产成本,同时解决了固废堆存引起的环境问题。

In this study,the zinc electrolysis anode slime with MnO2 obtained as the main component at the zinc electrowinning process was used to oxidize the ferrous ions in the leaching solution of zinc calcine.The effects of reaction temperature,reaction time,stirring speed,particle size of anode slime and liquid-solid ratio on the oxidation ratio of ferrous ions were studied.The experimental results show that the oxidation ratio of ferrous ions reaches as high as 99.80%under the optimal conditions of reaction temperature of 85℃,reaction time of 60 min,stirring speed of 500 r/min,anode mud particle size of 0.154 mm and liquid-solid ratio of 14∶1.This process not only makes full use of resources and reduces production costs but also solves the environmental problems caused by solid waste storage,achieving the efficient utilization of the electrolytic anode slime produced by zinc smelting enterprises.