碳质金矿预处理技术研究进展

碳质金矿选别前的预处理是提高金精矿回收率的一种有效方法。随着难处理碳质金矿所占比例越来越多，采用焙烧法、氧化法、覆盖抑制法及竞争吸附法等单一预处理法的效果难以获得较高的金浸出率，可以采用浮选-焙烧氧化、微生物二次氧化及微生物-化学氧化等多段预处理工艺，增加金回收率的同时降低处理成本。介绍了碳劫金机理及近年来碳质金矿预处理技术的研究进展，分析了现有预处理方法的优缺点及应用情况，并展望了未来的发展方向。 

The Development of Pretreatment Technology of Carbonaceous Gold Ore

Pretreatment is an effective method to improve the quality and recovery rate of gold concentrate. With the increasing proportions of refractory carbonaceous gold ore, it is difficult to obtain a higher gold leaching rate by the conventional pretreatment methods such as roasting, oxidation, covering inhibition and competitive adsorption. In this situation, flotation-roasting oxidation, microbial secondary oxidation and microbial chemical oxidation can be used to improve the recovery of gold and reduce the cost of treatment. In this paper, the mechanism of carbon robbing gold and the research progress of pretreatment technology of carbonaceous gold ore have been introduced. The advantages and disadvantages of the existing pretreatment methods and their applications are described. Meanwhile, the future directions of development are prospected.