含铁铜钴硫酸渣浸出液水解沉淀法除铁试验研究  

Test Study on Iron Removal from Leaching Solution of Sulfuric Acid Slag Containing Iron,Copper andCobalt by Hydrolysis Precipitation Method

作　　者：程彦玲 宋文强 陈官华 张汉泉[1] 余洪[1] CHENG Yanling;SONG Wenqiang;CHEN Guanhua;ZHANG Hanquan;YU Hong(School of Resources and Safety Engineering,Wuhan Institute of Technology,Wuhan 430073,China)

机构地区：[1]武汉工程大学资源与安全工程学院,湖北武汉430073

出　　处：《金属矿山》2023年第7期232-236,共5页Metal Mine

基　　金：湖北省教育厅科学技术研究项目(编号:B2017055)。

摘　　要：为了从含铁及铜钴等有价金属的硫酸渣浸出液中回收铜钴,针对高浓度铁离子浸出液,提出水解沉淀法除铁,系统研究了氧化剂H2O2用量、氧化时间、滴定温度、滴定终点p H值、搅拌时间等对铁去除率以及铜钴损失率的影响。结果表明,最佳沉铁条件为H2O2用量5 m L、氧化时间2 h、滴定温度70℃、滴定终点p H=3.0、搅拌时间1.0h,此时浸出液中铁的去除率为91.97%,铜和钴的损失率分别为12.20%和12.04%。SEM-EDS和XRD分析结果表明,碳酸钙沉铁渣渣相单一,产物表面光滑,呈棒状和不规则的片状;产物主要物质为二水硫酸钙和针铁矿。在除铁过程中,少量的Cu和Co被沉淀物吸附,从而导致了Cu和Co的损失。In order to recover copper and cobalt from the leaching solution of sulfuric acid slag containing valuable metals such as iron and copper and cobalt,a hydrolysis precipitation method was proposed to remove iron from the leaching solution with high concentration of iron ions.The effects of the amount of oxidizing agent H2O2,oxidation time,titration temperature,pH value of titration end point and stirring time on the iron removal rate and the loss rate of copper and cobalt were systematically studied.The results showed that the optimal conditions for iron precipitation are H2O2 dosage of 5 mL,oxidation time of 2 h,titration temperature of 70℃,titration end pH value of 3.0,stirring time of 1.0 h.At this time,the removal rate of iron in the leaching solution is 91.97%,and the loss rate of copper and cobalt are 12.20%and 12.04%,respectively.SEM-EDS and XRD analysis results showed that the calcium carbonate iron precipitation residue has a single phase,and the surface of the product is smooth with rod shape and irregular sheet.The main substances of the product are calcium sulfate dihydrate and goethite.In the process of iron removal,a small amount of Cu and Co are adsorbed by the precipitate,resulting in the loss of Cu and Co.

关 键 词：铜钴浸出液 水解沉淀法 除铁 铜钴损失率 

分 类 号：TF811[冶金工程—有色金属冶金]