冶炼烟气制酸酸性废水铜砷分离及反应装置选型  

Copper-Arsenic Separation and Reaction Device Selection for Acid Wastewater from Smelting Flue Gas

作　　者：赵宇涵 李山东 陈虎 朱昊天 张雪峰 王吉杰 ZHAO Yuhan;LI Shandong;CHEN Hu;ZHU Haotian;ZHANG Xuefeng;WANG Jijie(Jinchuan Group Copper Co.,Ltd.,Jinchang 737100,Gansu,China)

机构地区：[1]金川集团铜贵公司,甘肃金昌737100

出　　处：《有色金属(冶炼部分)》2025年第3期160-164,共5页Nonferrous Metals(Extractive Metallurgy)

摘　　要：铜冶炼烟气制酸过程中会产生大量酸性废水,这些酸性废水最大的特点是铜、砷含量高且成分复杂。这类废水目前通常采用硫化钠-石灰-铁盐法处理,通过投加硫化钠或硫氢化钠使重金属以硫化物的形式沉淀析出,产生大量含铜、砷、锌、铅等的混合危废。针对现有工艺创新研究了铜砷分段硫化资源回收技术。创新除铜、除砷分段治理工艺流程,根据铜、砷氧化还原反应电极电位不同,控制两级硫化反应不同的ORP值,使硫化铜、硫化砷分段沉淀,减少了危废渣产生量,硫化铜渣返回冶炼系统配料,实现废水中铜资源回收。A large amount of acidic wastewater is produced in the process of acid production from copper smelting flue gas,which is characterized by high copper and arsenic content and complex composition.At present,the treatment of this kind of wastewater usually adopts the method of sodium sulfide-lime-iron salt,by adding sodium sulfide or sodium hydrogen sulfide to precipitate the heavy metals in the form of sulfide,resulting in a large number of mixed hazardous wastes containing copper,arsenic,zinc,lead,etc.Based on the existing process innovation,the resource recovery technology of copper and arsenic stage vulcanization was studied.The innovative stage treatment process for copper and arsenic removal controls the different ORP values of the two stage vulcanization reactions according to the different electrode potentials of the copper and arsenic REDOX reactions,so that the copper sulfide and arsenic sulfide stage precipitation reduces the production of hazardous waste slag,and the copper sulfide slag is returned to the smelting system for mixing,realizing the recovery of copper resources in the wastewater.

关 键 词：冶炼烟气 酸性废水 硫化法 铜砷分离 反应装置选型 

分 类 号：TF811[冶金工程—有色金属冶金] TQ111.16[化学工程—无机化工]