(1. 昆明理工大学 冶金与能源工程学院，昆明 650093；
2. 昆明理工大学 省部共建复杂有色金属资源清洁利用国家重点实验室，昆明 650093)
摘 要: 采用铁粉置换法处理湿法炼锌产生的锌浸渣还原浸出液，产出一种含砷铜渣，以该含砷铜渣为研究对象，利用氧压酸浸缓慢分解含砷铜渣，使其中的铜、锌等溶解进入溶液，同时，砷、铁以臭葱石的形式沉淀为浸出渣，从而将铜的浸出和砷、铁的沉淀在同一反应釜同一过程中完成，有效实现含砷铜渣中有价金属的浸出过程与杂质的沉淀过程在同一过程同步进行。结果表明：在反应温度为135 ℃、反应时间为4 h、液固体积质量比25 mL/g、硫酸浓度为50 g/L、氧分压500 kPa、铁砷摩尔比为1的条件下，浸出渣中铜含量仅为2.03%，浸出率达到97.72%，砷含量达到26.06%，沉淀率达到95.98%；浸出液中铜的浓度达到20.47 g/L，砷浓度小于0.63 g/L，实现了铜和砷的高效分离，提高了铜金属回收率和资源综合利用率。浸出渣中砷均以臭葱石(FeAsO4？2H2O)的形式存在，符合当前的环境友好型发展理念。
关键字: 湿法炼锌；氧压浸出；铜砷渣；铜砷分离
（1. Faculty of Metallurgy and Energy Engineering, Kunming University of Technology, Kunming 650093, China;
2. State Key Laboratory of Complex Nonferrous Metal Resources Clean Utilization, Kunming University of Science and Technology, Kunming 650093, China）
Abstract:The reduction leaching solution of zinc leaching residue from zinc hydrometallurgy uses the iron powder replacement method to produce an arsenic containing copper residue. Taking the arsenic containing copper residue as the research object, the oxygen pressure acid leaching was used to slowly decompose the arsenic containing copper residue, so that the copper and zinc were dissolved into the solution. At the same time, the arsenic and iron were precipitated in the form of smectite as the leaching residue, so leaching copper and fixating arsenic iron precipitation is completed in the same process in the same reactor, effectively realizing that the leaching process of valuable metals in arsenic containing copper residue and the precipitation process of impurities were carried out simultaneously in the same process. The results show that, under the conditions of reaction temperature 135 ℃, reaction time 4 h, liquid-solid ratio 25 mL/g, sulfuric acid concentration 50 g/L, oxygen partial pressure 500 kPa and iron arsenic molar ratio 1, in the leaching residue, the copper content is only 2.03%, the leaching rate of Cu is 97.72%, the arsenic content is 26.06% and the precipitation rate of As is 95.98%. The concentration of Cu in the leaching solution reaches 20.47 g/L and the concentration of As is less than 0.63 g/L, which realizes the efficient separation of Cu and As and improves the metal recovery and comprehensive utilization of resources. Arsenic in leaching residue exists in the form of FeSO4？2H2O, which is in line with the current concept of environment-friendly development.
Key words: zinc hydrometallurgy; oxygen pressure leaching; copper arsenic precipitation; copper arsenic separation
