论文部分内容阅读
许多矿石经选矿处理可获得含金硫化物精矿(主要为黄铁矿),该精矿不宜直接进行氰化浸出.在这类难处理含金精矿中通常含有砷、锑等有害元素,从而给冶金工艺和环境保护带来麻烦。因此,为了处理这类精矿,在氰化之前通常要进行预处理,最常用的预处理法有焙烧法、加压氧化法、化学氧化法、预充气法以及最新的细菌氧化法。本文比较了用细菌氧化法和经典的焙烧法处理含金黄铁矿精矿的技术经济指标,介绍了这两种方法的流程,生产费用和基本投资的初步估算以及回收率。研究结果表明,细菌预氧化法具有潜在的优点。
Many ore beneficiation process can be obtained gold sulfide concentrate (mainly pyrite), the concentrate should not be directly cyanide leaching in such refractory gold concentrate usually contain arsenic, antimony and other harmful elements, Thus bringing trouble to the metallurgical process and environmental protection. Therefore, for the treatment of such concentrates, pretreatment is usually carried out before cyanidation. The most common pretreatment methods are calcination, pressurized oxidation, chemical oxidation, pre-aeration and the latest bacterial oxidation. This article compares the technical and economic indicators of the treatment of gold-containing pyrite concentrates by bacterial oxidation and classical roasting, and presents the preliminary estimates and recovery rates of the processes, production costs, and basic investments for these two processes. The results show that bacterial pre-oxidation has potential advantages.