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首页> 外文期刊>International Journal of Minerals,Metallurgy and Materials >Process mineralogy characteristics of acid leaching residue produced in low-temperature roasting-acid leaching pretreatment process of refractory gold concentrates
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Process mineralogy characteristics of acid leaching residue produced in low-temperature roasting-acid leaching pretreatment process of refractory gold concentrates

机译：耐火金浓度低温焙烧酸浸出预处理过程中酸浸出残留物的矿物学特性

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摘要

To provide a theoretical basis for a suitable process to extract gold from refractory gold concentrates, process mineralogy on the acid leaching residue of gold calcine was studied by chemical composition, X-ray diffraction, scanning electron microscopy-energy spectrum, and mineral dissociation analysis. The results showed that the acid leaching residue contained Au 68.22 g/t, Ag 92.71 g/t, Fe 0.44%, As 0.10%, and S 0.55%. Gold and silver minerals existed as native gold, argentite, and proustite. Quartz, the main gangue mineral, accounted for 78.33wt/%. The dissociation degree analysis showed that the proportions of monomer and exposed gold in acid leaching residue were 96.66wt%. The cyanidation results showed that the cyanide gold leaching rate of acid leaching residues was close to 100wt%. However, the maximum cyanide gold leaching rate of gold calcine was only 85.31wt%. This suggests that acid leaching can increase the gold dissolution rate in the cyanide process.
机译：为了为来自难治金浓缩物提取金的合适方法提供理论依据，通过化学组成，X射线衍射，扫描电子显微镜和矿物解离分析研究了金煅烧的酸浸出残留物的方法矿物质。 结果表明，酸浸出残留物含有Au 68.22g / t，Ag 92.71g / t，Fe 0.44％，0.10％，S为0.55％。 金银矿物质存在于原始黄金，阿根廷人和proustite。 石英，主要的煤矸石矿产，占78.33Wt /％。 解离程度分析表明，酸浸出残余物中的单体和暴露金的比例为96.66wt％。 氰化物结果表明，酸浸出残留物的氰基浸出率接近100wt％。 然而，金刚石的最大氰基浸出率仅为85.31wt％。 这表明酸浸出可以增加氰化物过程中的金溶解速率。

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