用氧化还原法脱除硫酸钴溶液中的Mn^(2+)  

Removal of Mn^(2+) From Cobalt Sulfate Solution by Controlling Redox

作　　者：彭学斌 田林[1,2] 翟忠标 李小英[1,2] 戴永年 PENG Xuebin;TIAN Lin;ZHAI Zhongbiao;LI Xiaoying;DAI Yongnian(Kunming Metallurgical Research Institute,Kunming 650031,China;State Key Laboratory of Pressurized Hydrometallurgy Technology for Associated Nonferrous Metal Resources,Kunming 650503,China;School of Metallurgy and Energy Engineering,Kunming University of Science and Technology,Kunming 650093,China)

机构地区：[1]昆明冶金研究院,云南昆明650031 [2]共伴生有色金属资源加压湿法冶金技术国家重点实验室,云南昆明650503 [3]昆明理工大学冶金与能源工程学院,云南昆明650093

出　　处：《湿法冶金》2018年第6期478-481,共4页Hydrometallurgy of China

摘　　要：研究了通过控制溶液氧化还原电位氧化脱除粗CoSO_4溶液中的Mn^(2+)。利用Na2S2O8(2.08V)、Mn^(2+)(1.3V)、Co^(2+)(1.8V)在溶液中最高氧化还原电位之间的差异,通过控制CoSO4溶液Me-H2O系的氧化还原电位,以Na2S2O8作氧化剂,氧化脱除溶液中的Mn2+。结果表明:在溶液电位为0.4～1.3V、Na2S2O8用量为4倍锰理论物质的量、溶液氧化终点pH为5.0～5.5、Na2S2O8浓度为0.1mol/L、温度为60℃、反应时间为1h、搅拌速度为250r/min条件下,Mn2+最高脱除率达99.5%,钴氧化损失率在5%以内,Mn2+的氧化脱除效果较好。The removing of Mn 2+from crude CoSO 4 solution by controlling potential oxidation was studied.Based on the maximum redox potential difference of Na 2S 2O 8(2.08 V),Mn^2+(1.3 V)and Co 2+(1.8 V)in aqueous solution and E-pH potential of Me-H 2O system,the Mn 2+in the solution can be removed using Na 2S 2O 8 as oxidant.The results show that under the conditions of the crude CoSO 4 solution potential of 0.4~1.3 V,Na 2S 2O 8 amount of 4 times theoretical molar amount on manganese,oxidation end point pH of 5~5.5,reaction temperature of 60℃,Na 2S 2O 8 concentration of 0.1 mol/L,reaction time of 1 h,stirring speed of 250 r/min,the highest removal rate of Mn 2+can reach 99.5%,the oxidation loss of cobalt is controlled within 5%.

关 键 词：粗CoSO4溶液 MN^2+ Na2S2O8 氧化电位 脱除 

分 类 号：TF803.25[冶金工程—有色金属冶金] X703[环境科学与工程—环境工程]