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.
出处
《中国有色金属学报》
EI
CAS
CSCD
北大核心
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
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
waste copper-clad laminate
flotation tailings
bioleaching
copper recycling
acidophilic iron-oxidizing enrichment
