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锌精矿中的银在浸取锌的过程中几乎全部富集在浸出渣中,并以硫化银和金属的形态存在,且其粒度很小,故可用浮选法回收。小型试验和工业试验结果表明,以国产2号油为起泡剂,黑药为捕收剂,产出的银精矿含银品位可达6000-20000g/t,若浸出渣的银含量300-440g/t,银的选矿回收率为65～70％,尾矿含银80～120g/t,浮选过程中,铜亦可得到相应的回收;可以实现无外排尾水的浮选工艺。 产出的浮选精矿含Zn40-45％,Cu4-5％,Ag0.6-2.0％,S30％±,采用硫酸化焙烧-浸出-二氧化硫还原银-锌粉沉铜的工艺予以处理,银、铜的回收率可分别达97.4％和96.06％。
Zinc concentrate in the leaching of zinc in the process of leaching almost all of the silver in the leaching residue and silver sulfide and metal form, and its small size, it can be recovered by flotation. The results of small-scale tests and industrial tests show that with the domestic 2 # oil as a foaming agent and the black drug as a collector, the silver grade of the produced silver concentrate can reach 6000-20000 g / t. If the silver content of the leached residue is 300- 440g / t, silver beneficiation recovery rate of 65 to 70%, tailings silver 80 ~ 120g / t, flotation process, copper can be recovered accordingly; can be achieved without tail water tailing flotation process. The flotation concentrate produced contains Zn 40-45%, Cu 4-5%, Ag 0.6-2.0%, and S30% ±, and is treated by the process of sulfated roasting-leaching-sulfur dioxide reduction silver- , The recoveries of copper can reach 97.4% and 96.06% respectively.