镉熔炼含氯烧碱渣在黄钾铁矾法炼锌中的再利用  

Recycling of Chlorine-Containing Caustic Soda Slag during Zinc-Smelting with Jarosite Process

作　　者：石启英[1] 赵效如 何学斌 任有良[1] 

机构地区：[1]商洛学院化学与化学工程系,陕西商洛726000 [2]陕西锌业有限公司,陕西商洛726000

出　　处：《有色金属（冶炼部分）》2011年第4期3-5,9,共4页Nonferrous Metals（Extractive Metallurgy)

基　　金：陕西省教育厅专项科研基金资助项目(09JK419)

摘　　要：通过热水溶解、液固分离工艺从炼锌回收镉所产生的含氯烧碱渣中回收镉。含氯碱液在沉矾前进入锌湿法系统,沉矾时用Cl-替代OH-,铜镉渣的热酸浸出及铜渣的低酸洗涤生产CuCl等以消除Cl-的危害;沉矾时用Na+代替NH4+,锌、镉回收率达到99.90%。试生产证明经济效益、环保效益良好。The cadmium,contained in the chlorine-containing caustic soda slag from the process of cadmium-recycling during the zinc metallurgy,can be recycled by using hot water dissolving and liquid-solid separation process.The alkali liquor with chlorine entered into the zinc hydrometallurgy flowsheet before vitriol-sinking.When vitriol sinking,the replacement of OH-with Cl-and the hot acid leaching from the copper cadmium slag,as well as the production of CuCl from the copper slag with low-acid washing process can eliminate the harm from Cl-;and still the replacement of NH4＋ with Na＋ can be fully used.Thus the recovery rate of zinc and cadmium reached up to 99.90%.The trial production proved an ideal economic efficiency and environmental protection benefit.

关 键 词：黄钾铁矾法 烧碱渣 再利用 锌 氯 镉 

分 类 号：TF819.2[冶金工程—有色金属冶金]