中文摘要：

利用中温嗜热菌对某铅锌冶炼废渣进行生物浸出-盐浸处理研究，并根据国家固体废物浸出毒性方法（HJ／T299-2007）对盐浸后余渣进行毒性分析。研究结果表明，在pH1．5、温度65℃、矿浆浓度5％的优化条件下生物浸出3d后，废渣中Cu、In、Ga和Zn的浸出率分别达到了91．5％、91．8％、84．9％和93．4％；盐浸生物浸出渣，其浸出液中Ag、Ph浓度分别为7．6和247．5mg／L，可从废渣中有效回收Cu、In、Ga、Zn、Ag和Pb。生物浸出-盐浸处理后余渣约为原渣量的70％；毒性分析浸出液中重金属元素Ag、As、cd、cu、Ph和zn浓度分别为2～3．5、2～3、0．3～0．5、30～50、2～4、20—60mg／L，低于国家危险废物鉴别标准（GB5085．3-2007）。根据试验结果，提出了针对冶炼废渣资源化、减量化、无害化的生物浸出-盐浸联用工艺。

英文摘要：

A combined bioleaching and brine leaching process was carried out to assess the loss of Pb/Zn from smelting slags, and evaluation of toxicity for the leached residue was also processed according to China＇ s Extraction Procedure for Leaching Toxicity of Solid Wastes （ HJ/T299-2007）. The results show that under optimized conditions （pH 1.5, the temperature 65 ℃, 5% pulp density and a leaching time of 3 days） , the loss of Cu, In, Ga and Zn in the Pb/Zn smelting slag accounts for 91.5% , 91.8% , 84.9% and 93.4% , respectively, of the total amount originally contained in the slags. The concentrations of silver and lead in brine leachate are 7.6 and 247.5 rag/L, respectively, and suggests that bioleaching and brine leaching processes can be effectively used to recycle Cu, In, Ga, Zn, Ag and Pb from smelting slags. This process can reduce the mass of residue to 70% of its original mass. The concentrations of Ag, As, Cd, Cu, Pb and Zn in leachate from the toxicity evaluation experiment are 2 - 3.5, 2 - 3, 0.3 - 0.5, 30 - 50, 2 - 4 and 20 - 60 mg/L respectively, which are less than the Identification Standards for Hazardous Wastes of China （ GB5085.3-2007）. On the basis of labscale experiment results, a combined process containing bioleaching and brine leaching has been designed to better enable the recovery of metals contained in smelting slag whilst reducing potential health and environmental risks associated with the disposal of smelting slags.