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25卷    第7期    总第196期    2015年7月

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文章编号:1004-0609(2015)-07-2000-06
微波焙烧预处理难浸含金硫精矿
陈 伟1, 2,丁德馨1, 2,胡 南2,李 峰1, 2

(1. 南华大学 核资源工程学院,衡阳 421001;
2. 南华大学 铀矿冶生物技术国防重点学科实验室,衡阳 421001
)

摘 要: 对难浸含金硫精矿进行微波焙烧,考察微波功率、矿量(即样品质量)和焙烧时间对样品质量损失率和浸出率的影响。结果表明:当微波功率为16 kW、焙烧时间为50 min、矿量为900 g时,样品质量损失率可达28.12%,浸出率可达71.56%,较原矿直接碘化浸出率(9.82%)有了大幅提高。利用XRD和SEM技术分析焙烧前后样品的成分和表面形貌,微波焙烧后的样品较原矿更为松散、多孔,更利于浸出。

 

关键字: 含金硫精矿;金;微波焙烧;预处理;浸出率;表面形貌

Pretreatment of refractory gold-bearing sulfur concentrates by microwave roasting
CHEN Wei1, 2, DING De-xin1, 2, HU Nan2, LI Feng1, 2

1. School of Nuclear Resource Engineering, University of South China, Hengyang 421001, China;
2. Key Discipline Laboratory for National Defence for Biotechnology in Uranium Mining and Hydrometallurgy,
University of South China, Hengyang 421001, China

Abstract:After roasting refractory gold-bearing sulfur concentrates by microwave, the influences of microwave power, the ore mass and roasting time on sample mass loss rate and leaching rate were investigated. The results show that sample mass loosing rate is 28.12% and iodide leaching rate is 71.56% after 900 g raw ore is roasted for 50 min at power of 16 kW, and the leaching rate after microwave pretreatment increases greatly than that of raw ore rate (9.82%). With the XRD and SEM technology analyzing mineral composition and surface morphology, roasted sample is more beneficial to leaching than raw ore because of ore inside becoming loose and generating plenty of pores.

 

Key words: gold-bearing sulfur concentrate; gold; microwave roasting; pretreatment; leaching rate; surface morphology

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

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

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