某含碳难处理金矿石选矿试验研究
Experimental Study on Beneficiation of a Refractory Gold Ore Containing Carbon
李程伟 1隋海波 1许庆砚1
作者信息
- 1. 烟台东方冶金设计研究院;烟台金鹏矿业机械有限公司
- 折叠
摘要
印度尼西亚某含碳金矿石金品位为12.92 g/t,碳含量为1.74%,其中碳主要以碳酸盐形式存在,其次为石墨碳和有机碳.为实现该金矿石的高效利用,在详细工艺矿物学研究的基础上,开展了直接氰化浸出、重选试验和浮选试验研究.结果表明:由于碳含量较高,随着磨矿细度增加和浸出时间延长,直接氰化浸出几乎不能浸出金;采用重选+浮选联合流程,在磨矿细度-0.074 mm占65%的条件下,经摇床1次重选,可获得金品位7 902.05 g/t、金回收率30.60%的重选精矿,重选尾矿以丁铵黑药+丁基黄药为组合捕收剂,2号油为起泡剂,经1粗2精2扫浮选闭路流程,可获得金品位85.59 g/t、金回收率64.58%的浮选精矿,金总回收率达到95.18%.
Abstract
The grade of gold and carbon of a gold ore containing carbon in Indonesia is 12.92 g/t and 1.74%,respectively.The carbon mainly exists in the form of carbonate,followed by graphitic carbon and or-ganic carbon.In order to realize efficiency utilization of the gold ore,based on the detailed research of pro-cess mineralogy,direct cyanide leaching,gravity separation tests and flotation tests were carried out.The re-search results show that due to the high carbon content,with the increase of grinding fineness and the leach-ing time,direct cyanidation can hardly leachate gold.By adopting the combined process of gravity separa-tion and flotation,under the condition that the grinding fineness of-0.074 mm accounts for 65%,via one stage shaking table gravity separation,gravity separation concentrate with gold grade of 7 902.05 g/t and gold recovery rate of 30.60%can be obtained.Using butyl ammonium aerofloat and butyl xanthate as collec-tor,2#oil as frother,through the flotation process of one roughing,two cleaning and two scavenging,the flo-tation concentrate with gold grade of 85.59 g/t and gold recovery of 64.58%is obtained.The total gold recov-ery reaches 95.18%.
关键词
含碳难处理金矿石/重选/氰化浸出/浮选/组合捕收剂Key words
refractory gold ore containing carbon/gravity separation/cyanide leaching/flotation/combined collector引用本文复制引用
出版年
2025
NETL
NSTL
万方数据