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含金砷黄铁矿是一种主要的不适于焙烧的难处理金矿物.生物氧化法是一种颇受欢迎的处理方案,但反应速度较慢并需要严格控制给料中砷的含量.在实验室规模下,作为一种可能的处理方法,在膜片槽反应器的酸化盐水中,研究了用氯进行的电化学矿浆氧化法.用含砷黄铁矿(FeAsS)、黄铁矿(FeS_2)和辉砷镍矿(NiAsS)的难处理精矿(可氰化的金含量约7％),试验表明,金回收率可达90％以上,反应速度比生物氧化法快得多,除副产的NaOH的销售使该方法有价值外,该法的经济效益取决于电费.此法能提供一个可应用于大、小不同储量的比炭浆浸出法更有利于环境保护的工艺流程。
Gold-bearing arsenic pyrites is a major refractory gold mineral that is not suitable for roasting Bio-oxidation is a popular treatment but has a slow reaction and requires a tight control of the arsenic content in the feed. Electrochemical slime oxidation with chlorine was studied as a possible treatment method in laboratory-scale acidified brine in a membrane trough reactor using arsenic-bearing pyrite (FeAsS), pyrite FeS 2 and NiAsS refractory concentrates with cyanidation gold content of about 7%. The experimental results show that the gold recovery rate can reach more than 90% and the reaction rate is much faster than that of biological oxidation. The cost-effectiveness of the method, which is based on the value of sales of by-product NaOH, depends on the cost of electricity, which provides a process that is more environmentally friendly than large-scale and small-volume reserves.