以碱性焙烧—水浸工艺从白银炉电收尘中选择性除砷及浸出动力学研究  

Selective Removal and Leaching Kinetics of Arsenic From Electric Dust Collection of Silver Furnace by Alkaline Roasting—Water Leaching

作　　者：王晓阳 王文祥 方红生 马承荣 吴克富[4] WANG Xiaoyang;WANG Wenxiang;FANG Hongsheng;MA Chengrong;WU Kefu(Department of Environmental Engineering,Guangdong Polytechnic of Environmental Protection Engineering,Foshan 528216,China;Material Analysis and Testing Center,Jihua Laboratory,Foshan 528200,China;Foshan Engineering Technology Research Center for Safe Disposal and Comprehensive Utilization of Hazardous Wastes,Foshan 528216,China;Copper Company,Baiyin Nonferrous Metals Group Co.,Ltd.,Baiyin 730900,China)

机构地区：[1]广东环境保护工程职业学院环境工程学院,广东佛山528216 [2]季华实验室材料分析测试中心,广东佛山528200 [3]佛山市危险废物安全处置与综合利用工程技术研究中心,广东佛山528216 [4]白银有色集团股份有限公司铜业公司,甘肃白银730900

出　　处：《湿法冶金》2022年第3期267-273,共7页Hydrometallurgy of China

基　　金：广东省基础与应用基础研究基金面上项目(2020A1515011007);广西壮族自治区重点研发计划项目(桂科AB19259004);2017广东普通高校创新团队项目(2017GKCXTD004);广东省季华实验室自主立项项目(X200191TL200)。

摘　　要：研究了采用碱性焙烧—水浸工艺从白银炉电收尘中选择性分离砷及回收有价金属,考察了碱性焙烧、浸出过程中各因素对金属浸出率的影响,并分析了碱性焙烧渣中砷的浸出动力学。结果表明:电收尘在碱料质量比1.2/1、温度600℃下焙烧2 h,再在液固体积质量比4 mL/1 g、温度60℃、搅拌速度250 r/min条件下用水浸出1.0 h,砷浸出率达91.55%,实现了与铅、锌等有价金属的选择性分离;浸出渣中的有价金属总质量分数高达59.60%,砷质量分数低于0.81%,可直接返回熔炼系统综合回收。砷浸出过程符合JMA模型,受扩散控制,浸出反应表观活化能为10.98 kJ/mol。Selective separate arsenic and valuable metals from a electric dust collection of silver furnace alkaline roasting—water leaching process was studied.The influence of various factors in the process of alkaline roasting—water leaching on metal leaching rate were examined,and the leaching kinetics of the alkaline roasting slag was analyzed.The results show that the arsenic leaching rate reaches 91.55%under the conditions of alkali mass/material mass of 1.2/1,roasting at 600℃for 2 h;water volume/roasting slag mass of 4 mL/1 g,stirring rate of 250 r/min at 60℃for 1.0 h,and the arsenic is selective separated from lead,zinc and other valuable metals.The total mass fraction of valuable metals in the leaching residue is up to 59.60%and arsenic fraction is less than 0.81%.The leaching residue can be directly returned to smelting system for comprehensive recovery.The leaching process conforms JMA model and is mainly controlled by diffusion.The apparent activation energy is 10.98 kJ/mol.

关 键 词：白银炉电收尘 碱性焙烧 水浸 砷 浸出 动力学 

分 类 号：TF803.21[冶金工程—有色金属冶金] TF803.25