(1. 中南大學(xué)資源加工與生物工程學(xué)院生物冶金教育部重點實驗室，長沙 410083;
2. 環(huán)境保護部華南環(huán)境科學(xué)研究所，廣州 510655)
摘 要: 利用生物浸出的方法實現(xiàn)廢覆銅板分選渣中殘留銅的資源化，主要研究Fe2+物質(zhì)添加量、浸出時間、初始pH和渣投加量(固形物含量)等因素對不同來源廢覆銅板渣中銅生物浸出的影響。結(jié)果表明：生物浸出銅過程中無需額外再添加Fe2+能源物質(zhì)且能夠短時間內(nèi)(≤5 h)快速高效浸出不同來源分選殘渣中的銅；初始pH和渣投加量對廢覆銅板渣中銅浸出產(chǎn)生顯著影響。優(yōu)化結(jié)果表明：控制初始pH≤2.2，渣投加量20%~30%，無額外添加酸和Fe2+，兩種分選殘渣生物浸出5 h后，銅浸出率可達95%以上。
關(guān)鍵字: 廢覆銅板；分選殘渣；生物浸出；銅回收；嗜酸鐵氧化富集物
（1. Key Laboratory of Biometallurgy, Ministry of Education,
School of Minerals Processing and Bioengineering, Central South University, Changsha 410083, China;
2. South China Institute of Environmental Sciences, Ministry of Environment Protection, Guangzhou 510655, China）
Abstract:Recycling of the flotation tailings of waste copper-clad laminates was achieved by bioleaching method, the effects of Fe2+re-addition, leaching time, initial pH and pulp density on the copper extraction were investigated. Theresults show that an effective copper extraction can be achieved without re-addition of Fe2+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 Fe2+ and acid.
Key words: waste copper-clad laminate; flotation tailings; bioleaching; copper recycling; acidophilic iron-oxidizing enrichment
