从脆硫铅锑精矿中生产1~#电银的实践

Production of 1~# Silver from Jamesonite in Nanning Smelter

介绍南宁市冶炼厂从脆硫铅锑矿生产 1#电银的生产实践。脆硫铅锑矿经烧结 -鼓风炉熔炼 -铅电解精炼工艺回收锑和铅 ,从铅电解阳极泥中以贵铅熔炼和银电解方法生产 1#电银。一年多的生产实践表明 ,当阳极板含银大于 98%以上时 ,阳极板中铜、铅、铋杂质含量对电银质量影响不大。控制电解液成分在CPb2 + <4g/L ,CCu2 + <2 0 g/L ,CAg+ 80～ 12 0 g/L ,CHNO34～8g/L范围 ,采用浓度 5～ 10 g/L、温度 80～ 90℃的稀硝酸洗涤银粉 ,1#电银产出率可达 10 0 %。

The production practice of 1 # cathode silver from the jamesonite concentrate is introduced 1 # cathode silver is produced from the jamesonite concentrate by precious lead smelting and silver electrolysis after sintering and blast furnace smelting It is indicated by more than one year production that the quality of the silver product is almost not affected by the contents of copper, lead and bismuth in anode while the silver content in anode is more than 98% The yield of 1 # cathode silver is up to 100% if the composition of electrolyte is controlled at range of C Pb 2+ <4g/L, C Cu 2+ <20g/L, C Ag +80～120g/L, C HNO 3 4～8g/L, and the cathode silver powder is washed with the dilute nitric acid with 5～10g/L concentration and 80～90℃ temperature