Transactions of Nonferrous Metals Society of China The Chinese Journal of Nonferrous Metals

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中国有色金属学报

ZHONGGUO YOUSEJINSHU XUEBAO

第24卷    第12期    总第189期    2014年12月

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文章编号:1004-0609(2014)12-3129-07
复杂难处理金精矿还原固硫熔炼富集金
罗虹霖,刘 维,覃文庆,刘瑞增,郑永兴,杨 康,韩俊伟

(中南大学 资源加工与生物工程学院,长沙 410083)

摘 要: 提出一种处理复杂难处理金精矿的新工艺,主要包括还原固硫熔炼富集金和电解分离铅金两种主要工序。研究其中还原固硫熔炼富集金,分析熔炼温度、铁加入量、铅加入量以及熔炼时间等因素对金直收率的影响,确定最佳工艺条件如下:添加四氧化三铁、废旧铅酸蓄电池胶泥、氧化钙和焦炭的质量分数分别是金精矿质量的95%、86%、22%和10%,样品在1100 ℃下熔炼1 h后在1200 ℃保温30 min,金的直收率和总收率分别达到97.02%和 98.53%,金得到有效富集,由原金精矿中金含量18.05 g/t提高到铅合金中金含量49.56 g/t,含量提高约1.73倍。

 

关键词: 复杂难处理金矿;还原固硫熔炼;富集金;铅合金

Enriching gold from refractory gold concentrate by reducing sulfur-retention smelting
LUO Hong-lin, LIU Wei, QIN Wen-qing, LIU Rui-zeng, ZHENG Yong-xing, YANG Kang, HAN Jun-wei

School of Minerals Processing and Bioengineering, Central South University, Changsha 410083, China

Abstract:A new technology composed of two main processes, namely, enriching gold by reducing sulfur-retention smelting and electrolysis to separate lead and gold, was proposed for the treatment of refractory gold concentrates. The processes of reducing sulfur-retention smelting were investigated. The effects of smelting temperature, iron addition amount, lead addition amount and smelting time on direct recovery rate of gold were analyzed. The results show that the optimum conditions are as follow: the addition amount of Fe3O4, lead-acid battery colloid sludge, CaO and metallurgical coke is 95%,86%,22% and 10% (mass fraction) of the amount of gold concentrates, respectively, and the sample was melted at 1100 ℃ for 1 h and then at 1200 ℃ for 30 min. Under the optimum conditions, the direct and total recovery ratios of gold are 97.02% and 98.53%, respectively, so gold is collected effectively. The gold content of 49.56 g/t in the lead alloy increases by about 1.73 times than that of 18.05 g/t in the gold concentrate.

 

Key words: refractory gold concentrate; reducing sulfur-retention smelting; enriching gold; lead alloy

ISSN 1004-0609
CN 43-1238/TG
CODEN: ZYJXFK

ISSN 1003-6326
CN 43-1239/TG
CODEN: TNMCEW

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