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在不到十年的时间中,细菌培养在选矿中的应用已从一种从低品位矿石和废石中廉价回收铜的无名方法发展成为一项在难处理金矿中获得日益增多应用的高新技术。与焙烧技术相比,生物氧化不仅在提高金回收率的同时可极大地降低基本投资和生产成本,而且由于采用生物氧化法处理含金量不到2g/t的硫化矿物也有利可图,这就使矿石储量大幅增长。全球金产量的三分之一估计均来自位于已采掘的近地表氧化矿之下的难处理矿石矿床。主要为黄铁矿和砷黄铁矿的硫化矿物包裹着的金,这使金无法采用常规处理技术来获得。这样,只有通过使原生硫化矿物氧化后才能使金解离以便随后加以回收。
In less than a decade, the use of bacterial culture in beneficiation has evolved from an anonymous approach to the inexpensive recovery of copper from low-grade ores and waste rock to a high-tech gaining an ever-increasing number of applications in refractory gold technology. Compared with roasting technology, biooxidation not only improves the gold recovery rate but also greatly reduces the capital investment and the production cost. And because the biooxidation method is also profitable for the treatment of sulphide minerals with a gold content of less than 2g / t, Ore reserves have risen sharply. One-third of the global gold production is estimated to come from the refractory ore deposits located beneath mined near-surface oxide ore. Gold, mainly encased in sulphide minerals of pyrite and arsenopyrite, can not be obtained using conventional processing techniques. In this way, gold can only be dissociated by subsequent oxidation of the native sulphide minerals for subsequent recovery.