铜冶炼过程制酸废酸原液中硫酸回收利用  

Recovery and Utilization of Sulfuric Acid from Waste Acid Solution in Copper Smelting Process

作　　者：张涛[1] 张玲玲[1] ZHANG Tao;ZHANG Ling-ling(Guixi Smelter,Jiangxi Copper Corporation,Guixi 335424,Jiangxi,China)

机构地区：[1]江西铜业集团公司贵溪冶炼厂,江西贵溪335424

出　　处：《铜业工程》2018年第6期44-45,62,共3页Copper Engineering

摘　　要：铜冶炼烟气制酸过程产出大量废酸原液,现国内采用硫化-中和工艺,产出大量石膏废渣,造成较大二次危废处置难题。为减轻石膏二次危废产出量,采用均相阴膜扩散渗析技术处理工艺,选择性优先回收其中硫酸,结果,硫酸回收率大于90%,硫酸主品位91.6%。处理后废酸可返回主工艺循环利用。A large amount of waste acid was produced in the process of producing acid from copper smelting flue gas,which was treated with sulfur-neutralization process at present.However,a large amount of gypsum waste residue will be produced in this process,which will cause serious secondary waste disposal problems.In order to reduce the secondary hazardous waste output of gypsum,the process of homogeneous anion diffusion dialysis technology is adopted to selectively recycle sulfuric acid.As a result,the recovery rate of sulfuric acid is more than 90%,and the main grade of sulfuric acid is 91.6%.After treatment,the spent acid can be recycled back to the main process.

关 键 词：废酸原液 均相膜技术 扩散渗析 回收硫酸 循环利用 

分 类 号：X75[环境科学与工程—环境工程]