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为分析金精矿中碳质在生物预氧化提金工艺中的影响,以贵州泥堡高硫卡林型金精矿为原料,以气相色谱-质谱联用仪(GC-MS)分析了样品中有机碳可能的有机组分;结合拉曼光谱分析了该碳质在微观空间尺度上碳原子的空间排布特征和规律,并讨论了其与劫金性质的关系;结合劫金指数(PRI)测定以及对不同含金溶液的吸附实验,进一步分析其劫金能力和载金能力;最后结合生物预氧化产品炭浆法(CIP)氰化提金实验,分析了该碳质在实际生物预氧化提金工艺中的影响.结果表明:矿样中有机碳组分为干酪根,其裂解气含有多种干酪根母源有机质,不利于氰化;拉曼光谱分析结果与PRI测试结果吻合,均表明矿样中碳质具有高劫金性质;在实际生物预氧化产品CIP氰化提金过程中,采用添加活性炭与劫金碳质竞争吸附,可减少10.14%已溶出的金被劫金碳质吸附,后续金浸出率可达80.17%.
In order to analyze the effect of carbon concentration in gold concentrate on the biological pre-oxidation gold extraction process, the samples of high-sulfur karelinite gold concentrate in Guizhou Province were analyzed by gas chromatography-mass spectrometry (GC-MS) The possible organic components of organic carbon were analyzed. The characteristics and regularities of the carbon atoms in the microscopic spatial scale were analyzed by Raman spectroscopy. The relationship between the carbon atoms and the properties of robbery gold was discussed. ) Determination and adsorption experiments of different gold-containing solutions, further analysis of gold robbery ability and gold-bearing capacity; Finally, combined with biological pre-oxidation product CIP cyanidation gold extraction experiment, analysis of the carbon in the actual biological pre- The results show that the organic carbon component in the ore sample is kerogen, the pyrolysis gas contains a variety of kerogen organic matter, which is unfavorable for cyanidation. The results of Raman spectroscopy are in good agreement with the PRI results, All of them showed that the carbonaceous material had high robbery gold property. During the process of CIP cyanidation of actual biological pre-oxidized product, the adsorption of activated carbon and carbonaceous carbonaceous material could reduce the dissolution of gold by 10.14% Adsorption, follow-up gold leaching rate of up to 80.17%.