载体浮选回收某锌浸出渣中的银

Recovering Silver from Zinc Leaching Residue with Carrier Flotation

为使内蒙古某湿法炼锌厂锌浸出渣中的银得到回收,对该锌浸出渣进行了浮选试验。试验结果表明,由于银矿物主要以微细粒分布在锌浸出渣中,导致常规浮选回收率低下,而采用载体浮选工艺可显著改善浮银效果:以粒度为-0.037 mm的有机物AC-0为载体、石灰为pH调整剂、硫化钠为活化剂、丁铵黑药和乙硫氨酯为捕收剂,通过1粗1精1扫闭路载体浮选流程,可获得银品位为8 670 g/t、银回收率为61.67%的银精矿。

In order to recover silver from zinc leaching residue which produced by a zinc hydrometallurgy factory in Inner Mongolia,did some tests with flotation method.The results show that,because of the fine disseminated silver mineral in zinc leaching residue,the recovery rate is low with conventional flotation but can be remarkably better by carrier flotation.Taking-0.037 mm organic matter AC-0 as carrier,lime for pH adjustment agent,odium sulfide as activating agent,ammonium dibuyldithiophosphate and isopropyl ethylthionocarbamate as collectors,finally get the grade of 8 670 g/t silver concentrate with the recovery rate of 61.67% through the closed circuit test of one roughing,one cleaning,and one scavenging system.