Mineralogical characterization and pretreatment for antimony extraction by ozone of antimony-bearing refractory gold concentrates

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 i...

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Published inTransactions of Nonferrous Metals Society of China Vol. 27; no. 8; pp. 1888 - 1895
Main Authors GUO, Xue-yi, XIN, Yun-tao, WANG, Hao, TIAN, Qing-hua
Format Journal Article
LanguageEnglish
Published Elsevier Ltd 01.08.2017
Subjects
antimony extraction
antimony-bearing refractory gold concentrates
mineralogical characterization
ozone
pretreatment
antimony-bearing refractory gold concentrates
pretreatment
mineralogical characterization
ozone
antimony extraction
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Summary: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.
ISSN:1003-6326
DOI:10.1016/S1003-6326(17)60213-9