嗜酸铁氧化富集物高效浸提废覆铜板分选残渣中的铜  

High extraction of copper from flotation tailings of waste copper-clad laminates by acidophilic iron-oxidizing enrichment

作　　者：仉丽娟[1] 刘晓文[2] 康鑫[1] 陈岩贽[2] 周文根[1] 史美玉 周文博[1] 温勇[2] 王炜[2] 周洪波[1,2] 

机构地区：[1]中南大学资源加工与生物工程学院生物冶金教育部重点实验室,长沙410083 [2]环境保护部华南环境科学研究所,广州510655

出　　处：《中国有色金属学报》2015年第10期2936-2944,共9页The Chinese Journal of Nonferrous Metals

基　　金：中央重金属污染防治专项资金项目

摘　　要：利用生物浸出的方法实现废覆铜板分选渣中残留铜的资源化，主要研究Fe^2＋物质添加量、浸出时间、初始pH和渣投加量（固形物含量）等因素对不同来源废覆铜板渣中铜生物浸出的影响。结果表明：生物浸出铜过程中无需额外再添加Fe^2＋能源物质且能够短时间内（≤5h）快速高效浸出不同来源分选残渣中的铜；初始pH和渣投加量对废覆铜板渣中铜浸出产生显著影响。优化结果表明：控制初始pH≤2．2，渣投加量20％～30％，无额外添加酸和Fe^2＋，两种分选残渣生物浸出5h后，铜浸出率可达95％以上。Recycling of the flotation tailings of waste copper-clad laminates was achieved by bioleaching method, the effects of Fe^2＋ re-addition, leaching time, initial pH and pulp density on the copper extraction were investigated. The results show that an effective copper extraction can be achieved without re-addition of Fe^2＋ within 5 h. The initial pH and pulp density play important roles in copper extraction. Under the optimized condition of initial pH≤2.2 and pulp density 20%-30%, the Cu leaching rate is more than 95% in 5 h without re-addition of Fe^2＋ and acid.

关 键 词：废覆铜板 分选残渣 生物浸出 铜回收 嗜酸铁氧化富集物 

分 类 号：Q939.97[生物学—微生物学]