降低锌湿法冶炼过程浸出渣含锌的处理工艺

Treatment technology of reducing zinc content in leaching slag in Zinc Hydrometallurgy

在锌湿法冶炼过程中,降低浸出渣的含锌量,对提高锌的回收率与生产成本意义重大。本文针对某厂在锌冶炼过程中现行处理工艺存在的主要问题,并对本次改进前锌冶炼的浸出渣含锌量进行介绍说明。经试验进行处理工艺改进研究,发现在锌冶炼过程中的浸出温度、浸出时间以及酸度都会对含锌量造成影响,结果表明在75℃、pH为1.5情况下连续浸出4h,达到3.12%浸出渣含锌量,其中包括1.03%可溶含锌量,与改进工艺前相较降低可溶锌含量达1.02%。证实了本次提出降低锌湿法冶炼过程中,浸出渣含锌量改进处理工艺的可行性。

In the process of zinc hydrometallurgy,reducing the zinc content of the leaching slag is of great significance to improve the recovery rate and production cost of zinc.This paper aims at the main problems existing in the current treatment process of zinc smelting in a factory,and introduces the zinc content of the leach residue before the improvement.The results show that the leaching temperature,leaching time and acidity in zinc smelting process will affect the zinc content.The results show that the zinc content of 3.12%of the leach residue is reached for 4 hours at 75℃and pH 1.5,including 1.03%of the soluble zinc content,which is 1.02%lower than before the improvement.It is proved that the feasibility of improving the treatment technology of reducing zinc content in the leaching slag is proved.