【摘要】 酸性矿山废水沉淀渣的处置一直是废水处理工程面临的难题。以广东省大宝山矿槽对坑尾矿库外排废水处理厂产生的沉淀渣为例,开展沉淀渣中有价金属元素酸浸与回收试验。淀渣铁、锰、铜、锌、镍、铅品位分别为40 919.6,14 320.6,4 681.4,7 557.4,149.3,360.9 g/t,杂质成分主要为石英、方解石。在硫酸浓度为20%、固液比为0.33 g/m L、浸出时间为8 h、浸出温度为30℃条件下,铜、锌、镍、铅、锰和铁的浸出率分别为99.49%、21.41%、51.21%、4.45%、55.86%、34.25%。采用硫酸浸出工艺回收沉淀渣中有价金属元素在技术经济上可行,同时可缓解废水处理厂的环保压力。更多还原

【Abstract】 The disposition of Acid Mine Drainage( AMD) sludge has become a serious problem in wastewater treatment industry for a long period. An AMD sludge sample was taken from the wastewater treatment plant of the Duikeng tailings reservoir,Dabaoshan Mine,Guangdong Province,and an experiment was conducted to recover valuable metals from the sludge by sulfuric acid leaching method. There is 40 919. 6 g / t Fe,14 320. 6 g / t Mn,4 681. 4 g / t Cu,7 557. 4 g / t Zn,149. 3 g / t Ni,360. 9 g / t Pb,the impurity components are mainly quartz,calcite. In sulfuric acid concentration is 20%,solid-liquid ratio is0. 33 g / m L,the leaching time of 8 h,leaching temperature 30 ℃,the copper,zinc,nickel,lead,manganese and iron leaching rate were 99. 49%,21. 41%,51. 21%,4. 45%,55. 86% and 34. 25%. Using sulfuric acid leaching process recycling valuable metals element in precipitation slag economically feasible in technology,at the same time,the pressure of the wastewater treatment plant of environmental protection was alleviated.更多还原