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研究了两种不同类型(黄铁矿型,斑岩型)黄铜矿生物浸出的差异.实验结果表明:两类黄铜矿生物浸出差别很大,48 d后黄铁矿型黄铜矿浸出率为46.96%,斑岩型黄铜矿浸出率为14.5%.对Fe2+、矿物表面Cu2p谱图和矿床特征的分析发现:适量的Fe2+能促进黄铜矿的浸出,但最佳用量不一样;浸渣表面产物不同,斑岩型黄铜矿表面出现富铜层,阻碍了浸出继续进行;与原矿相比,铜结合能都降低,符合Hiroyoshi等提出黄铜矿浸出的两步溶解模型;两类黄铜矿生物浸出的差异是由成矿岩体、围岩、伴生矿物和元素、成矿温度和压力等因素综合决定的.
The differences in bioleaching of two different types of pyrite (porphyrite-type) chalcopyrite were studied.The results showed that the bioleaching of the two types of chalcopyrite differed greatly, and the pyrite-type chalcopyrite leaching The rate of 46.96% and the leaching rate of porphyry type chalcopyrite 14.5% .Analysis of the Cu2p spectra and the characteristics of the deposit on the surface of Fe2 +, the results show that: the appropriate amount of Fe2 + can promote the leaching of chalcopyrite, but the optimum dosage is different; Different products on the surface of the leached slag, the copper-rich layer appears on the surface of the porphyry-type chalcopyrite, which hinders the leaching from proceeding. Compared with the ore, the copper binding energy decreases, which is in line with the two-step dissolution model proposed by Hiroyoshi et al. The difference in bioleaching of chalcopyrite is determined by a combination of ore-forming bodies, surrounding rocks, associated minerals and elements, metallogenic temperature and pressure.