一、前言从湿法炼锌浸出渣中回收银的工艺过程是分两个阶段进行的。第一阶段是选矿过程,目的是将浸出渣中的银采用浮选工艺以产出银精矿;第二阶段是冶炼过程,即从银精矿中提炼金属银并回收其锌、铜等。前者已在《湖南冶金》1982年第二期中报道过。本文是叙述后者的试验情况。锌浸出渣浮选产出的银精矿,实际上是一种富银的硫化锌精矿。对于这种原料,我们采用“硫酸化焙烧-稀硫酸浸出-二氧化硫还原沉银-锌粉置换铜”的工艺流程,从中 I. Introduction The process of recovering silver from the leaching residue of hydrometallurgy is carried out in two stages. The first stage is the beneficiation process, the purpose is to leach the silver in the flotation process to produce silver concentrate; the second stage is the smelting process, that is, from the refining of silver concentrate and recovery of zinc, copper and so on. The former has been reported in “Hunan Metallurgy” in 1982 second period. This article describes the experimental conditions of the latter. Silver leaching residue flotation of silver concentrate, in fact, is a silver-rich zinc sulfide concentrate. For this raw material, we use “sulfuric acid roasting - dilute sulfuric acid leaching - sulfur dioxide reduction Shen silver - zinc replacement copper,” the process, from which