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砷黄铁矿中所含的金是不适宜用焙烧法处理的难浸金资源。生物氧化是一种较普遍的处理方法,但该过程较慢,而且需要精心地控制给料中砷的含量。对在实验室条件下用装有隔膜反应糟内的酸化盐水中的氯进行现场矿浆的电化学氧化的方法进行了评价,这种方法有可能作为处理上述物料的途径。试验所用的难浸金精矿含砷黄铁矿、黄铁矿和辉砷镍矿,试验结果表明,用这种方法时可得到90%以上的金回收率。用这种方法时的反应速度比生物氧化的快得多。这种方法的经济效果取决于电的费用,但是将副产品NaOH出售可使工艺过程变得有利可图。这种方法所用的流程比炭浆法/炭浸法的流程对环境污染更小,可适用于大小规模不同的资源。
Gold contained in the arsenopyrite is a refractory gold resource that is unsuitable for calcination. Biooxidation is a more common treatment, but the process is slower and care needs to be taken to control the amount of arsenic in the feedstock. The method of electrochemical oxidation of field slurries with chlorine in acidified brine filled with membrane reaction vapors under laboratory conditions was evaluated as a way to handle the above materials. The refractory gold concentrate used in the experiment contains arsenic-bearing pyrite, pyrite, and arsenic-bearing nickel ore. The experimental results show that gold recovery of over 90% can be obtained by this method. With this method, the reaction speed is much faster than the biological oxidation. The economic effect of this method depends on the cost of electricity, but the sale of byproduct NaOH can make the process profitable. The process used in this method is less pollution to the environment than the carbonization / carbonization process and can be applied to resources of different sizes.