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低品位难处理含金硫化矿因其含金价值太低，而不能用选矿方法经济地回收。选矿（通常用浮选）之后还要对硫化精矿进行氧化，才能使金易于常规氰化处理回收。已被采用的氧化方法有：酸性或碱性加压氧化法、焙烧法和BIOX法。BIOX法是由南非的GENMIN研-+已应用于工业生产，它包括磨矿和对精矿进行微生物槽浸。该法和其它氧化法一样，成本相对较高，用来处理低品位金矿石将无利可图。但是，如果在矿石破碎之后就采用细菌预浸来离解包裹金，使之易于氰化堆浸或其它溶剂的堆浸，则有可能在经济上过关。南非的GENMIN多年来一直致力于细菌堆浸工艺的研究，已完成了对含有耗酸脉石和非耗酸脉石等多种矿样的小试和扩试，并可用数学模型来预测试验室柱浸试验和扩大试验的结果。本文论述了采用细菌堆浸工艺处理低品位含金硫化矿的理论和试验研究结果，并对其经济指标进行了讨论。
Low-grade refractory gold sulfide ore because of its gold value is too low, but can not be economically beneficiated recovery method. After beneficiation (usually flotation) but also the sulfide concentrate oxidation, in order to make the gold easy to conventional cyanidation recovery. Oxidation methods that have been used are: acidic or alkaline pressure oxidation, calcination and BIOX method. The BIOX method, developed by South African GENMIN Research - +, has been used in industrial production, including grinding and microbiological tank digestion of concentrates. The same as other oxidation methods, the cost is relatively high, used to deal with low-grade gold ore will be unprofitable. However, if bacteria are pre-soaked to disintegrate the encapsulated gold after ore crushing, making it easier to heap leaching of cyanide or other solvents, it is possible to economically pass the clearance. GENMIN, South Africa, has been involved in the research of bacterial heap leaching for many years and has completed small and extended trials of various minerals including acid-consuming gangue and non-acid-labile gangue, and can use mathematical models to predict laboratory column Dip test and extend the test results. In this paper, the theoretical and experimental research on the treatment of low-grade gold-bearing sulphide ore by bacterial heap leaching is discussed, and the economic indicators are discussed.