吉林铜钴镍多金属硫化矿的生物浸出试验研究  

Bioleaching of Copper-cobalt-nickel Polymetallic Sulfide ores in Jilin

作　　者：张水龙 刘金艳[1,2] 杨林恒 杜诗雅 伍赠玲 Zhang Shuilong;Liu Jinyan;Yang Linheng;Du Shiya;Wu Zengling(College of Zijin Mining,Fuzhou University,Fuzhou,FujianChina;State Key Laboratory of Comprehensive Utilization of Low-grade Refractory Gold Resources,Zijin Mining Group Co.,Ltd.,Shanghang,Fujian,China)

机构地区：[1]福州大学紫金矿业学院,福建福州350116 [2]紫金矿业集团股份有限公司低品位难处理黄金资源综合利用国家重点实验室,福建上杭364200

出　　处：《矿产综合利用》2020年第1期50-53,58,共5页Multipurpose Utilization of Mineral Resources

摘　　要：吉林某铜钴镍多金属硫化矿品位低,成分复杂,对其开展了生物摇瓶浸出与柱浸试验研究,结果表明:浸出温度对铜钴镍浸出率的影响显著,生物摇瓶浸出的适宜条件为矿浆浓度15%,初始pH值1.5,浸出温度30℃,不添加Fe2+;酸浸预处理7d后进行生物柱浸试验,矿石粒度为-10 mm,接菌浸出60 d后,铜、钴、镍的浸出率分别为7.32%、27.47%和27.08%,与矿石粒度-20 mm无菌浸出的条件相比,钴镍浸出率提高了近8个百分点,说明细粒有菌条件有利于金属的浸出;分析浸矿菌群组成,优势菌主要为嗜酸硫杆菌属(Acidithiobacillus)和钩端螺旋菌属(Leptospirillum)。Jilin Copper-Cobalt-nickel polymetallic sulfide ore, with low metal grades and complex mineral compositions, was studied under the shake-flask bioleaching and column bioleaching experiments. It was shown that the leaching temperature demonstrated a more significant effect on the leaching rate of copper cobalt nickel. The optimal conditions for the shake-flask bioleaching experiment was the 15% of pulp concentration, initial p H value 1.5, leaching temperature 30℃ and no Fe2+ addition. The biological column leaching experiments was carried out after the acid leaching pretreatment of 7 d. the results showed that in the condition of-10 mm particle sizes and bacteria inoculation, the copper, cobalt and nickel leaching rate was 7.32%, 27.47% and 27.08% separately after 60 days, which was nearly 8 points ahead in cobalt and nickel leaching rates compared with the condition of-20 mm particle sizes and no bacteria inoculation. It was indicated that fine particles and bacterial inoculation were beneficial to the leaching of metals. The microflora results showed that the dominant bacteria were mainly acidithiobacillus and leptospirillum.

关 键 词：生物摇瓶浸出 柱浸 多金属硫化矿 菌群组成 

分 类 号：TD982[矿业工程—选矿]