某高砷高硫金精矿工艺矿物学研究  

Process mineralogy study of a high-arsenic high-sulfur gold concentrate

作　　者：马东梅 卢军 王艳 高歌 张修超 Ma Dongmei;Lu Jun;Wang Yan;Gao Ge;Zhang Xiuchao(Changchun Gold Research Institute Co.,Ltd.;Liaoning Jinfeng Gold Mining Co.,Ltd.)

机构地区：[1]长春黄金研究院有限公司选冶研究所,130012 [2]辽宁金凤黄金矿业有限责任公司

出　　处：《黄金》2022年第9期77-80,87,共5页Gold

摘　　要：针对某金精矿,进行了详细的工艺矿物学研究,并在此基础上进行了生物氧化—氰化浸出试验验证,考查了金流失状态。结果表明:金精矿金品位38.71 g/t,含硫19.69%、砷22.01%,属于高砷高硫金精矿。金矿物嵌布状态以包裹金为主,粒度非常细小,以微粒金为主,占99.53%。采用生物氧化—氰化浸出工艺处理,金浸出率为84.04%;浸渣中流失的金除脉石矿物包裹外,多流失在砷酸盐混合物中,少流失在金属硫化物中;目的矿物浸出效果良好,金的流失特征符合工艺矿物学研究结果。A detailed process mineralogy study of a gold concentrate was carried out.Based on that, a biological oxidation-cyanidation leaching test was carried out for verification, investigating the gold loss state.The results show that the gold concentrates have a gold grade of 38.71 g/t and contain sulfur 19.69 % and arsenic 22.01 %,belonging to high-arsenic and high-sulfur gold concentrates.The gold minerals, in terms of embedding status, are dominated by encased gold with very fine grains, the dominant microgranular gold accounting for 99.53 %.The biological oxidation-cyanidation leaching process obtains a gold leaching rate of 84.04 %;the gold lost in leaching residue is mostly lost in arsenate mixtures, except for gangue minerals wrapping, and a little is lost in metallic sulfide;target minerals have good leaching performance and the gold loss characteristics are consistent with process mineralogy study results.

关 键 词：金精矿 高砷 高硫 生物氧化 微粒金 工艺矿物学 

分 类 号：TD91[矿业工程—选矿]