摘要
在含砷难处理金矿中添加氧化铜造锍熔炼,将金和银富集在铜锍中。通过单因素实验法研究了造锍熔炼过程中主要元素的行为,得到造锍熔炼的最佳条件为:质量比m(CaO)/m(SiO2)=0.5、m(FeO)/m(SiO2)=2.0,物料中铜的总含量为5%,熔炼温度为1300℃,保温时间为60 min,此时金银在铜锍中得到有效富集。金在锍相中的品位为78.3 g/t,回收率可达到99.98%;锍相中铜的回收率为98.64%;渣相中砷和硫含量都很低。物相分析表明铜锍相中的铜和铁主要是以CuFeS2、FeS、Cu2S和Cu存在,对金具有富集作用。
Copper oxide was added to a refractory arsenic-bearing gold ore and then smelted.Gold and silver were captured by the copper-matte produced during smelt.By single-factor experiment,the optimum conditions of making the matte were as follows:m(CaO)/m(SiO2)=0.5,m(FeO)/m(SiO2)=2.0,the copper content in the mixed material was 5%,smelting temperature was 1300℃,holding time was 60 min.Under these conditions,gold and silver could be efficiently enriched in the copper-matte.The gold content in matte was 78.3 g/t,with a recovery rate of 99.98%,while 98.64%of copper added was found in the matte.The contents of both arsenic and sulfur in the slag were very low.The phase analysis of the copper-matte reveals that copper and iron are mainly present in the states of CuFeS2,FeS,Cu2S and Cu which have enriching effect on gold.
作者
杨天足
卢一帆
张杜超
刘伟锋
陈霖
令红斌
YANG Tianzu;LU Yifan;ZHANG Duchao;LIU Weifeng;CHEN Lin;LING Hongbin(School of Metallurgy and Environment, Central South University, Changsha 410083, China)
出处
《贵金属》
CAS
CSCD
北大核心
2019年第2期5-11,共7页
Precious Metals
基金
国家重点研发计划项目(NO.2018YFC1901604)
国家自然科学基金青年科学基金(51404296)
湖南省自然科学基金青年基金项目(2018JJ3678)
关键词
黄金
含砷难处理金矿
造锍熔炼
低品位铜锍
gold
refractory arsenic-bearing gold ore
matte smelting
low grade copper-matte
