李强.低品位氧化铜钴矿直接还原浸出工艺研究[J].矿冶,2019,28(3):.
低品位氧化铜钴矿直接还原浸出工艺研究
Study on Direct Reduced Leaching of Low Grade Oxidized Copper and Cobalt Ores
投稿时间:2018-10-17  修订日期:2019-04-18
DOI:
中文关键词:  氧化铜钴矿  SO2  还原浸出  两段逆流
英文关键词:oxidized copper and cobalt ores  SO<sub>2</sub>  reduced leaching  two stage adverse current
基金项目:国家科技支撑计划(2013BAE04B00);
  
作者单位
李强 北京矿冶科技集团有限公司
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中文摘要:
      针对复杂低品位氧化铜钴矿开展直接还原浸出工艺研究。结果表明,在磨矿粒度-74μm占比80~85%、液固比2/1(mL/g)、浸出温度80℃、酸耗为100kg/t矿、浸出时间4h、通SO2气体控制浸出终点电位340~350mV的条件下,Cu、Ni、Co浸出率分别为37.605%、51.184%和80.832%。在此基础上采用两段逆流浸出,可有效节约还原剂SO2的用量和实现浸出液游离酸的综合利用,节省后续中和环节碱的消耗量。
英文摘要:
      The direct reduced leaching of complex low grade of oxidized copper and cobalt ores was studied.The results show that the leaching rates of copper, nickel and cobalt are 37.605%、51.184% and 80.832% respectively, in the following conditions: the liquid to solid ratio 2:1,the leaching temperature 80℃, the sulfuric acid consumption 100kg/t ore, the leaching time 4 h,the ending potential 340~350mV.On this basis, the use of two stage countercurrent leaching, can effectively save the amount of reducing agent SO<sub>2</sub> and the comprehensive utilization of free acid in the leaching solution, save the alkali consumption of the following process.
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