(1. 中南大學 冶金科學與工程學院，長沙 410083；
2. 大冶有色金屬股份有限公司 博士后科研工作站，黃石 435005)
摘 要: 為有效去除鋅濕法冶金過程中的微量鈷，探索采用臭氧氧化凈化ZnSO4溶液中鈷的可行性，考察攪拌速度、反應溫度、氣體流量、溶液pH值、鈷離子濃度、鋅離子濃度等因素對除鈷效果的影響。結果表明：在鋅離子初始濃度100 g/L、鈷離子初始濃度20 mg/L、溫度30 ℃、氣體流量800 mL/min、pH=5.0、攪拌速度800 r/min等條件下，反應30 min后，鈷濃度可降至0.2 mg/L，除鈷率高達99%。
關鍵字: 臭氧；氧化；除鈷率；ZnSO4溶液
（1. School of Metallurgical Science and Engineering, Central South University, Changsha 410083, China;
2. Postdoctoral Workstation, Daye Nonferrous Metals Co., Ltd., Huangshi 435005, China）
Abstract:In order to remove trace cobalt in the process of zinc extractive hydrometallurgy, a novel method to precipitate cobalt from ZnSO4 solution by ozone oxidation was proposed. The factors influencing the effect of removing cobalt, including stirring speed, temperature, gas flow rate, pH and concentrations of cobalt ion and zinc ion were investigated. The results show that the cobalt concentrations and elimination rate can reach 0.2 mg/L and 99%, respectively, under the solution conditions as initial concentrations of cobalt and zinc 20 mg/L and 100 g/L, controlling pH of 5.0, stirring speed of 800 r/min, gas flow rate of 800 mL/min, reacting time of 30 min at 30 ℃.
Key words: ozone; oxidation; cobalt removal rate; ZnSO4 solution
