中文摘要：

针对桌锌冶炼厂高酸浸出渣含银高的特点，采用硫酸化焙烧-水浸脱锌铁-氯化浸银-冷却结晶PbCl2-铅片置换沉银工艺，对高酸浸出锌渣进行了回收银研究。结果表明，锌和铁的浸出率分别达到92．66％和94．67％，浸出液返回炼锌主流程生产电锌；银和铅的浸出率分别达到94．17％和97．89％；用铅片置换得到粗银粉，银置换率达到99％以上。

英文摘要：

Zinc acid-leaching residue contains silver of high grade, so the process of sulphation roasting-remove zinc and iron by water leaching-chlorination leaching silver - cooling - crystallization PbCl2 - cementation silver with lead is used to extracting silver from it. The results indicate that leaching rate of zinc and iron is 92.66% and 94. 67% separately, leach liquor retain to main process. Leaching rate of silver and lead is 94. 17% and 97.89% separately. Coarse silver powder is prepared by lead-cementation-and cementation rate is higher than 99%.