兰坪难处理氧硫混合铅锌矿冶选联合工艺  

Combined process of hydrometallurgy and beneficiation for the refractory oxygen-sulfur mixed lead-zinc ore in Lanping mine

作　　者：李四光 LI Si-guang

机构地区：[1]云南金鼎锌业有限公司,云南怒江671401

出　　处：《中国有色冶金》2021年第2期49-53,63,共6页China Nonferrous Metallurgy

摘　　要：兰坪矿区堆存低品位难处理氧硫混合铅锌矿为3800万t,品位Zn5.73%、Pb1.32%,该矿石性质极其复杂,具有品位低、氧化率高、含泥量大、嵌布粒度细等特点,是一种典型的难处理矿石,其利用技术属世界级难题。云南金鼎锌业有限公司投入大量试验研究经费进行了选矿技术攻关,未取得良好结果。为了经济有效地处理低品位难处理氧硫混合矿,公司确定采用一种先冶后选联合工艺流程,通过已熟练掌握的"浸出-萃取-电解"新工艺技术处理氧硫混合矿中的氧化锌,再对所产出的浸出渣借鉴常规浮选工艺进行硫化锌浮选。在试验确定的较优浸出工艺条件下,氧化锌冶炼回收率92%,硫化锌选矿回收率95%,锌资源总回收率大于90%,比传统的先选后冶工艺,锌回收率提高30%。该冶选联合工艺对原料的适应性强、流程简短、回收率高,而且是闭路循环,不产生废水、废气,产生的尾渣属于一般固废,其环保效益、经济效益明显,并且实用性强。The stockpile quantity of the low grade refractory oxygen-sulfur mixed lead-zinc ore in Lanping mine is 38 million tons,with the grade of Zn5. 73 % and Pb1. 32 %. The ore is extremely complex,with low grade,high oxidation rate,large mud content and fine disseminated grain size. It is a typical refractory ore,and its utilization technology is a world-class problem. Yunnan Jinding Zinc Industry Co.,Ltd. invested a large amount of experimental research funds for research on beneficiation technology,but did not achieve good results. In order to deal with the low-grade refractory oxygen-sulfur mixed ore economically and effectively,the company decided to adopt a combined process of hydrometallurgy first and then beneficiation. First,the new technology of"leaching-extractionelectrolysis"is used to treat the zinc oxide in the oxygen-sulfur mixed ore,and then the flotation process is used to treat the zinc sulfide in the leaching residue. Under the optimal leaching process conditions determined in the experiment,the recovery rate of zinc oxide is 92%,the recovery rate of zinc sulfide is 95%,and the total recovery rate of zinc resources is greater than 90%,which is 30% higher than the traditional process of beneficiation first and then metallurgy. The combined process of hydrometallurgy and beneficiation has advantages such as strong adaptability to raw materials,short process,high recovery rate,and it is a closed loop,does not produce waste water or exhaust gas,and the generated tailings are general solid wastes. Its environmental protection and economic benefits are obvious,and it is practical.

关 键 词：兰坪铅锌矿 氧硫混合铅锌矿 难处理矿石 冶选联合工艺 锌回收率 环保 

分 类 号：TF813[冶金工程—有色金属冶金] TF812