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金属矿山 ›› 2016, Vol. 45 ›› Issue (10): 177-180.

• 综合利用 • 上一篇    下一篇

用浸出工艺回收酸性矿山废水沉淀渣中金属元素

王晓亮1,2,3,麦戈1,2,3,陈涛1,2,晏波1,2,肖贤明1,2   

  1. 1.中国科学院广州地球化学研究所,广东 广州 510640;2.有机地球化学国家重点实验室,广东 广州 510640;3.中国科学院大学,北京 100049
  • 出版日期:2016-10-15 发布日期:2016-11-04
  • 基金资助:

    基金项目:广东省科技计划项目(编号:2014B090901040,2014B030301060),广东省省级环保专项资金项目(编号:粤财工2014-176)。

Recovery of Valuable Metal Elements from Acid Mine Drainage Sludge

Wang Xiaoliang1,2,3,Mai Ge1,2,3,Chen Tao1,2,Yan Bo1,2,Xiao Xianming1,2   

  1. 1.Guangzhou Institute of Geochemistry,Chinese Academy of Sciences,Guangzhou 510640,China;2.State Key Laboratoryof Organic Geochemistry,Guangzhou 510640,China;3.University of Chinese Academy of Sciences,Beijing 100049,China
  • Online:2016-10-15 Published:2016-11-04

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/mL、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。

关键词: 酸性矿山废水, 沉淀渣, 有价金属, 酸浸

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 is 0.33 g/mL,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.

Key words: Acid mine drainage, Sludge, Valuable metal, Acid leaching