Research status of carbonaceous matter in carbonaceous gold ores and bio-oxidation pretreatment  

碳质金矿的碳质物及生物氧化预处理研究现状(英文)

作　　者：杨洪英[1] 刘倩[1] 宋襄翎[1] 董金奎 

机构地区：[1]东北大学材料与冶金学院,沈阳110819 [2]山东黄金矿业(莱州)有限公司,莱州261441

出　　处：《Transactions of Nonferrous Metals Society of China》2013年第11期3405-3411,共7页中国有色金属学报（英文版）

基　　金：Projects(51174062,51104036)supported by the National Natural Science Foundation of China;Project(2012BAE06B05)supported by the National Science and Technology Support Program of China during the 12th Five-Year Plan Period;Projects(2012AA061502,2012AA061501)supported by the National High-Tech Research and Development Program of China;Projects(N120602006,N110302002,N110602005)supported by Fundamental Research Funds for the Central Universities of China

摘　　要：Carbonaceous gold mines are important refractory gold ores. The previous results demonstrate that the carbonaceous matter is mainly composed of elemental carbon, organic acid and hydrocarbons. The dissolved aurocyanide complex is robbed by adsorption of carbonaceous matter, which is similar to activated carbon in cyanide leaching of gold. The pretreatment methods of carbonaceous gold ores were introduced, including high temperature roasting, bio-oxidation, chemical oxidation, competitive adsorption, barrier inhibition and microwave roasting. Recently, bio-oxidation was developed rapidly due to its advantages such as mild conditions, simple processes, low energy consumption and friendly environment. The known microorganisms related with bio-oxidation pretreatment mainly are chemolithotroph bacteria such as Thiobacillus ferrooxidans, Thiobacillus thiooxidans and Leptospirillum ferrooxidans. The researches on decomposing and passivating carbonaceous matter were commenced by Phanerochaete chrysosporium, Pseudomonadaceae and Streptomyces setonii. Finally, the main problems were analyzed and the application prospect of this technique was looked forward.碳质金矿是一种重要的难处理金矿。研究发现,其碳质物主要包括元素碳、有机酸和烃类物质。在氰化浸金过程中碳质物可通过类活性炭的吸附方式将已溶解的金劫走。目前,已有的预处理方法主要有高温焙烧法、生物氧化法、化学氧化法、竞争吸附法、覆盖抑制法、微波加热法。生物氧化法因具有条件温和、流程简单、能耗低、环境友好等优点得以迅速发展。与生物氧化预处理有关的微生物主要有氧化亚铁硫杆菌、氧化硫硫杆菌、氧化亚铁钩端螺旋菌等化能无机自养菌。有关黄孢原毛平革菌、假单胞菌、多毛链霉菌在碳质物降解和钝化方面的研究也已展开。最后,分析了该技术存在的问题,并对其应用前景进行了展望。

关 键 词：carbonaceous gold ores carbonaceous matter PRETREATMENT bio-oxidization research status 

分 类 号：TF831[冶金工程—有色金属冶金]