用稀硫酸-有机酸体系浸出锌粉置换渣中的锗试验研究

Leaching of Germanium from Zinc Refinery Residues in the Dilute Sulfuric Acid-Organic Acid System

研究了用稀硫酸-有机酸体系从锌粉置换渣中回收锗。采用单因素试验探讨了锌粉置换渣中锗的浸出行为规律。考察了硫酸初始质量浓度、温度、浸出时间、液固体积质量比和有机酸种类及添加量对锗浸出率的影响。结果表明:在硫酸初始质量浓度70 g/L、温度55℃、浸出时间1 h、液固体积质量比10 mL/1 g、酒石酸加入量10 g/L和搅拌速度300 r/min条件下,锗、铜、锌浸出率分别为95.6%、96.8%和95.1%。该法为锌粉置换渣中锗的回收利用提供了一种新途径。

The recovery of germanium from zinc refinery residues by dilute sulfuric acid-organic acid system was studied.The leaching behavior of germanium from zinc refinery residues was discussed by single factor test.The effects of initial sulfuric acid mass concentration,temperature,leaching time,liquid volume solid mass ratio,organic acid type and addition amount on germanium leaching rate were investigated.The results show that the leaching rates of germanium,copper and zinc are 95.6%,96.8%and 95.1%,respectively,under the conditions of initial sulfuric acid mass concentration of 70 g/L,temperature of 55℃,leaching time of 1 h,liquid volume/solid mass ratio of 10 mL/1 g,tartric acid addition of 10 g/L and stirring speed of 300 r/min.This method provides a new way for the recovery and utilization of germanium from zinc refinery residues.