酸浸-摇床重选预处理对钴矿石生物浸出的影响  

Effect of preconditioning of acid leaching-gravity separation on cobalt ore bioleaching

作　　者：刘伟[1] 杨洪英[1] 佟琳琳[1] 陈国宝[1] 金哲男[1] 

机构地区：[1]东北大学材料与冶金学院,沈阳110819

出　　处：《材料与冶金学报》2015年第2期126-130,共5页Journal of Materials and Metallurgy

基　　金：国家自然基金项目(51174062;51104036);国家高技术研究发展计划项目(2012AA061502;2012AA061501);国家科技支撑计划项目(2012BAE06B05);中央高校基本科研业务费专项基金资助项目(N110302002;N130402014)

摘　　要：针对钴矿石含有大量可溶性碱性脉石的特点,提出酸浸—摇床重选除可溶性碱性脉石的预处理方案,并通过对比试验来验证该方案.结果表明:经过酸浸—摇床重选预处理后,酸浸矿中钙的质量分数由8.61%降至2.87%,去除率达74.32%,而金属钴损失率仅为0.15%.经过酸浸—摇床重选预处理,避免了浸出体系酸度不稳定的情况发生,减少了铁矾沉淀的生成量,同时也避免了硫酸钙沉淀的生成.酸浸矿体系钴回收率为87.7%,较原矿体系提高35.2%,效果良好.经过酸浸—摇床重选预处理不但使该钴矿石适合采用微生物浸出技术回收钴,而且也缓解了该矿山大量硫酸无法消耗的情况.Aimed at the cobalt ore a method of acid leaching-gravity separation was proposed to remove the soluble alkaline gangue from the ore. Experiments were conducted to verify the method. The results showed that the mass fraction of calcium content decreases from 8. 61% to 2. 87%,and the removal ratio of calcium is 74. 32%; the mass fraction of cobalt content increases from 1. 25% to 1. 62%,and the loss ratio of cobalt is only 0. 15%. After pretreatment,the amount of jarosite decreases,and formation of C a SO4 is avoided. As a result,an 87. 7% leaching ratio of cobalt is achieved,which is higher 35. 2% than that the system of the raw ore. Furthermore,the sulfuric acid pollution is alleviated.

关 键 词：硫铜钴矿 可溶性碱性脉石 酸浸—摇床重选 硫酸钙 

分 类 号：TF18[冶金工程—冶金物理化学]