某大型铅锌冶炼厂含重金属酸性废水处理实例  

Treatment of acid wastewater containing heavy metals in a large lead-zinc smelter

作　　者：李星[1] 李绪忠[1] 王杰 王水云[1] 胡尧 LI Xing;LI Xuzhong;WANG Jie;WANG Shuiyun;HU Yao(CINF Engineering Co.,Ltd.,Changsha,Hunan,410019,China;Guangxi Nandan South Metal Co.,Ltd.,Hechi,Guangxi,547200,China)

机构地区：[1]长沙有色冶金设计研究院有限公司,湖南长沙410019 [2]广西南丹南方金属有限公司,广西河池547200

出　　处：《硫酸工业》2022年第7期41-44,共4页Sulphuric Acid Industry

摘　　要：以某大型铅锌冶炼厂含重金属酸性废水为例,介绍了一种“石灰铁盐除砷+硫化除重金属+CO_(2)除硬度”的组合处理工艺。含重金属酸性废水经过该工艺处理后,出水水质满足并优于GB25466—2010的要求,全部得到回用,可为企业节省工业水费用72.72万元/a。该项目建设投资753.45万元,废水处理成本5.45元/t,年减排总砷8.76 t、总锌35.05 t、总铅3.50 t、总铜2.63 t、总镉0.53 t,消耗CO122.17 t/a,经济效益和环境效益显著。Taking the acid wastewater containing heavy metals from a large lead-zinc smelter as an example,a combined treatment process of“arsenic removal by lime iron salt+heavy metal removal by sulfurization+hardness removal by CO_(2)”is introduced.After the acid wastewater containing heavy metals is treated by this process,the effluent quality meets and exceeds the requirements of GB 25466-2010,all of which are recycled,saving 727.2 thousand yuan/a of industrial water cost for the enterprise.The construction investment of the project is 7.5345 million yuan,the cost of wastewater treatment is 5.45 yuan/t,the annual emission reduction is 8.76 t of total arsenic,35.05 t of total zinc,3.50 t of total lead,2.63 t of total copper,0.53 t of total cadmium,and the consumption of CO2 is 122.17 t/a.The economic and environmental benefits are significant.

关 键 词：酸性废水 重金属 硫化法 二氧化碳 除硬度 废水回用 

分 类 号：X703.1[环境科学与工程—环境工程]