本地混合菌群微生物氧化难处理含金硫化精矿（英文）

发布时间：2018-03-08 00:07

本文选题：生物氧化　切入点：难处理金矿　出处：《Transactions of Nonferrous Metals Society of China》2017年05期 　论文类型：期刊论文

【摘要】：采用含铁氧化菌和硫氧化菌的混合嗜中温菌群浸出阿根廷Andacollo矿的含金硫化浮选精矿。实验在摇瓶中进行,矿浆浓度为10%,采用pH 1.8的含亚铁离子的基础盐溶液作为介质。采用不同的方法对浸出液的pH值、氧化还原电位、亚铁离子和总金属浓度进行测定。结果表明,该种混合菌能够很好地还原浸出该难处理金矿,金的回收率可达91.6%,同时,铜和锌的浸出率也较高。动力学研究表明金属的溶解符合收缩核模型。其中,铜的溶解速率受生成产物层的扩散控制,而锌的溶解没有明显的控制步骤。
[Abstract]:The gold-bearing sulphide flotation concentrate of Argentine Andacollo ore was leached by mixed thermophilic bacteria containing ferric oxidizing bacteria and sulfur oxidizing bacteria. The experiment was carried out in a shaking flask. The pulp concentration is 10, the base salt solution containing ferrous ion with pH 1.8 is used as the medium. The pH value, the redox potential, the ferrous ion and the total metal concentration of the leaching solution are determined by different methods. The results show that the pH value, the redox potential, the iron ion and the total metal concentration of the leachate are determined by different methods. The mixed bacteria can reduce and leach the refractory gold ore very well, the recovery of gold can reach 91.6 and the leaching rate of copper and zinc is also higher. The kinetic study shows that the dissolution of metal accords with the shrinking nucleus model. The dissolution rate of copper is controlled by the diffusion of the formed product layer, while the dissolution of zinc has no obvious controlling steps.
【作者单位】： Centro
【基金】：supported by PIP 0368 from CONICET and PICT 0630 and 0623 from ANPCyT
【分类号】：TD925.5;TD953

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