堆浸工艺中氧化铜矿石粒级与浸出率相关性研究  

Study on Correlation between Particle Size of Oxidized Copper Ore and Its Metal Extraction Rate in Heap Leaching

作　　者：习泳[1] 吴爱祥[1] 朱志根[1] 江怀春[1] 

机构地区：[1]中南大学

出　　处：《金属矿山》2006年第9期49-52,共4页Metal Mine

基　　金：国家杰出青年基金项目(50325415);国家"973"重点基础研究发展规划项目(2004CB619205-1)

摘　　要：研究了在堆浸工艺中氧化铜矿石粒级大小与浸出率之间的相关性。研究结果表明,采用4∶1的液固比,pH<2.0时,浸出此类氧化铜矿石,可以达到很好的浸出效果,浸出反应48 h之后,就有部分铜被浸出,其浸出率可高达50%以上。当粒径由5 mm缩小至1 mm,其浸出率增大20个百分点;缩小至0.1 mm,其浸出率可增大40个百分点。可见矿石粒径愈小,其比表面积就愈大,单位时间内溶浸液与矿石接触的面积就愈大,反应就愈充分,浸出率就愈高。矿石中铜的浸出率与矿石粒径基本呈二次线性关系。The correlation between the particle size of oxidized copper ore and its metal extraction rate in heap leaching process was studied. The results showed that very good leaching effect was achieved in the heap leaching of this kind of oxidized copper ore when the liquid-solid ratio was 4：1 and the pH was below 2.0. After 48 hours＇leaching reaction, most of the copper was leached out, with the metal extraction rate being as high as above 50%. When the particle size was reduced by 5 times, the metal extraction rate increased by 20% , and when the particle size was reduced by 50 times, the metal extraction rate increased by 40%. It can be seen that the smaller the particle size of ore, the bigger the specific surface area of the ore is, and the larger the area of the ore contacted with the leaching liquid, the more complete the reaction and the higher the metal extraction rate will be. There is basically a quadratic linear relation between the copper leaching rate and the particle size of the ore.

关 键 词：氧化铜矿 石堆浸工艺 浸出率 

分 类 号：TD952.1[矿业工程—选矿]