(1. 中南大學 冶金與環(huán)境學院，長沙 410083； 2. 中南大學 稀有金屬冶金與材料制備湖南省重點實驗室，長沙 410083)
摘 要: 硫化鎳礦中常伴有銅，在浸出時鎳和銅往往同步進入浸出液，但由于銅鎳化學性質(zhì)相近而難以分離。針對這一難題，采用陰離子膜電解，通過控制槽電壓，分離溶液中的銅鎳，考察極距、電解液溫度、槽電壓、銅鎳濃度等因素對銅鎳分離效果的影響。結(jié)果表明：當溶液中Cu2+ 25 g/L、Ni2+ 37.5 g/L時，在極距4 cm、電解液溫度40 ℃、槽電壓0.53 V、電解10 h的條件下，陰極液中殘余總銅濃度可降到0.24 g/L，ΡNi/Cu比為155.7，銅鎳分離效果良好。
關(guān)鍵字: 陰離子膜電解；銅鎳分離；硫化鎳礦；浸出液
（1. School of Metallurgy and Environment, Central South University, Changsha 410083, China; 2. Hunan Key Laboratory for Metallurgy and Material Processing of Rare Metals, Central South University, Changsha 410083, China）
Abstract:Nickel sulfide ore always accompanies by a large amount of copper, and copper can be often leached simultaneously into the nickel leaching solution. However, because of their similar chemical properties, it is difficult to separate. Here, anion exchange membrane electrolysis was provided to separate copper from solution by controlling the cell voltage. The effects of polar distance, electrolyte temperature, cell voltage and concentrations of copper and nickel on separation of copper-nickel were studied and the optimal operation conditions were obtained. The results show that, for solution containing 25 g/L Cu2+ and 37.5 g/L Ni2+,the total residual Cu concentration in catholyte is depressed to 0.24 g/L and the ratio of ΡNi/Cu reaches 155.7 under the optimal conditions of polar distance 4 cm, electrolyte temperature 40 ℃, cell voltage 0.53 V, electrolysis time 10 h. A satisfied effect of separation of copper from nickel is obtained.
Key words: anion membrane electrolysis; separation of copper from nickel; nickel sulfide ore; leaching solution
