提铜萃余液中锌的回收  

Exploring the Recovery of Zinc from the Raffinate of Copper Solvent Extraction

作　　者：张建元 章宁 王晓歌 王洪凯 孙宏志 ZHANG Jian-yuan;ZHANG Ning;WANG Xiao-ge;WANG Hong-kai;SUN Hong-zhi

机构地区：[1]辽宁新都黄金有限责任公司,辽宁朝阳122000 [2]东北大学冶金学院,辽宁沈阳110819

出　　处：《有色设备》2021年第6期22-26,共5页Nonferrous Metallurgical Equipment

摘　　要：针对黄金冶炼企业金精矿焙烧-酸浸提铜后萃余液中含有的较多锌离子,采用"预中和-分段硫化"的工艺进行处理,以ZnS精矿的形式回收其中的锌。探明了萃余液预中和、净化及硫化过程各元素走向及影响规律,考察了各步骤工艺参数。结果表明,在室温、硫化钠过量系数为1.3、硫化pH=3.0、沉淀时间30 min的工艺条件下,萃余液中Zn回收率为96.56%,沉淀产物中Zn品位为52.32%;预中和、净化除去As、Cu等杂质元素后再硫化沉锌,沉淀产物中Zn的品位为54.08%。The raffinate of a gold smelter which adopts concentrate roasting and acid leaching for copper extractioncontains a high level of zinc ions. To recover the zinc, a process of pre-neutralization and sulfidization in stages is explored, with ZnS concentrate as the recovery product. The experiment explored the paths and the interplay of each main element through raffinate pre-neutralization, clarification, and sulfidization, and examined the process parameters in each unit operation. According to the experiment results, at room temperature and with sodium sulfate excess rate at 1. 3, sulfidization pH = 3. 0, and precipitation lasting 30 min, the Zn recovery from the raffinate reaches 96. 56%, and the Zn grade of the precipitation product reaches 52. 32%;after pre-neutralization and clarification for As, Cu and other impurities removal, the Zn grade of the sulfurization precipitation product reaches 54. 08%.

关 键 词：萃余液 硫化沉淀 净化 锌回收 

分 类 号：TF813[冶金工程—有色金属冶金]