用铁粉置换回收氰化金泥精炼废水中的金和银  

Replacement and recovery of gold and silver in cyanide gold slime refining wastewater with iron powder

作　　者：王明双 WANG Ming-shuang(Shandong Gold Smetling Co.Ltd.,Laizhou 261441,Shandong,China)

机构地区：[1]山东黄金冶炼有限公司,山东莱州261441

出　　处：《贵金属》2021年第1期7-10,共4页Precious Metals

摘　　要：采用铁粉置换处理山东黄金冶炼有限公司氰化金泥精炼废水,考察了铁粉用量、pH值、反应温度和置换时间等因素对金、银置换率的影响。条件实验确定的最佳工艺技术条件为:保持原液pH=0.5,铁粉用量2.5 kg/m^(3)、反应温度60℃、置换时间30 min,金和银的置换率在95%和97%以上;在工业应用中银的置换率进一步提高到98%以上。与锌粉置换法相比,铁粉对金和银的置换回收率更高,生产环境得到改善,具有物料消耗小、成本低等优点,经济效益明显。The cyanide gold slime refining wastewater of Shandong Gold Smelting Co.Ltd was treated by iron powder replacement method.The effects of iron powder dosage,replacement time,reaction temperature and pH value on the replacement rate of gold and silver were investigated.The obtained optimum replacement conditions are:maintaining iron powder dosage of 2.5 kg/m^(3),reaction temperature of 60℃,pH value of 0.5,and reaction time of 30 min.The replacement rates under the optimum conditions are above 95%and 97%for gold and silver,respectively.The sliver replacement rate can reach over 98%in the industrial application.Compared with zinc powder replacement method,the iron powder replacement method has high replacement rate,low cost and good production environment advantages,and its economic benefits are obvious.

关 键 词：氰化金泥 废水 铁粉 置换率 工业应用 

分 类 号：TF83[冶金工程—有色金属冶金]