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(英文版)

Transactions of Nonferrous Metals Society of China

Vol. 27    No. 8    August 2017

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Mineralogical characterization and pretreatment for antimony extraction by ozone of antimony-bearing refractory gold concentrates
Xue-yi GUO1,2, Yun-tao XIN1,2, Hao WANG1,2, Qing-hua TIAN1,2

1. School of Metallurgy and Environment, Central South University, Changsha 410083, China; 2. Cleaner Metallurgical Engineering Research Center, China Nonferrous Metals Industry Association, Changsha 410083, China

Abstract:The mineralogical characterization of antimony-bearing refractory gold concentrates and the antimony extraction by ozone in HCl solution were investigated. The mineralogical study shows that there exist stibnite(Sb2S3), arsenopyrite(FeAsS), pyrite(FeS2) and quartz in the concentrates, and the gold is mainly (67.42%) encapsulated in sulfides. The antimony extraction by ozone in hydrochloric acid was employed and the influences of temperature, liquid/solid ratio, HCl concentration and stirring speed on the extraction of antimony were investigated. High antimony extraction (93.75%) is achieved under the optimized conditions. After the pretreatment by ozone, the antimony is recovered efficiently and the gold is enriched in the leaching residue.

 

Key words: antimony-bearing refractory gold concentrates; ozone; pretreatment; mineralogical characterization; antimony extraction

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

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

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