真菌衍生有机酸浸出低品位氧化镍矿  

Leaching of Nickel and Cobalt from Low-Grade Lateritic Nickel Ores Using Organic Acids Produced by Fungus Aspergillus Niger

作　　者：刘学[1] 温建康[1] 阮仁满[1] 

机构地区：[1]北京有色金属研究总院生物冶金国家工程实验室,北京100088

出　　处：《稀有金属》2006年第4期490-493,共4页Chinese Journal of Rare Metals

基　　金：国家技术创新项目资助(02BK-100)

摘　　要：采用生物显微镜观察和微生物筛选分离技术,得到了一株产酸效率较高的真菌———黑曲霉菌并将其进行了扩大培养,发现了真菌产酸性能与接种量的基本关系。应用直接法与间接法分别对氧化镍矿进行了浸出试验,结果表明,间接法较比直接法的浸出效果更好;5%的矿浆浓度比10%的矿浆浓度浸出效果更好,11 d镍的浸出率可达63%。By microscope for biology and technology of screening, the fungus Aspergillus niger which can effectively produce organic acid was isolated from citric acid solution and cultured in Erlemneyer flasks. We found the basic relation between amount of acids from fungus producing and inoculation volume. Lateritic nickel ores were respectively processed by directleaching and indirect-leaching. Indirect-leaching gives a better result than direct-leaching. Moreover the recovery of nickel at the pulp density of 0. 5 g· L^-1 is higher than that at the pulp density of 1 g· L^-1, reaching 63% in 11 d.

关 键 词：氧化镍矿 黑曲霉菌 有机酸 浸出 

分 类 号：P618.63[天文地球—矿床学]