铁闪锌矿浮选精矿生物浸出  

BIOLEACHING OF MARMATITE FLOTATION CONCENTRATE

作　　者：石绍渊[1] 方兆珩[1] 

机构地区：[1]中国科学院过程工程研究所,北京100080

出　　处：《化工学报》2004年第7期1145-1149,共5页CIESC Journal

基　　金：国家自然科学基金重点资助项目 (No 5 983 415 0 )

摘　　要：研究了氧化亚铁硫杆菌浸出铁闪锌矿浮选精矿的过程 ,考察了正无菌、原菌种与驯化菌等条件下铁闪锌矿的浸出效果和矿浆浓度对矿物中有价金属浸出速率的影响 摇瓶试验表明 :pH值 2 0、温度 35℃、细菌接种量 10 %、矿浆浓度 5 %、矿石粒度 <35 5 μm (90 %以上 )和摇床转速 16 0r·min-1浸出条件下 ,经过驯化的氧化亚铁硫杆菌能够显著地提高铁闪锌矿的溶解速率和浸出率 ;提高矿浆浓度导致铁闪锌矿中有价金属浸出率降低 ,但单位时间内总的锌离子浸出量相应提高 .The bioleaching of marmatite flotation concentrates by Acidithiobacillus ferrooxidans was investigated. The leaching effects under the conditions of uninoculated, inoculated original strains, inoculated adapted strains were studied and the biooxidation rates of marmatite leached by the adapted strains for different pulp density values were determined. The experimental results on an orbital shaker showed that the adapted Acidithiobacillus ferrooxidans increased markedly the dissolution rate and the leaching ratio of marmatite under the leaching conditions of pH 2.0, temperature 35°C, 10% inoculating volume of microorganisms, 5% pulp density, -1. The increase of pulp density resulted in the decrease of the leaching ratio of Zn in marmatite minerals, and the increase of totally leached concentration of Zn2+ ions per unit time.

关 键 词：铁闪锌矿 氧化亚铁硫杆菌 生物浸出 

分 类 号：TF803[冶金工程—有色金属冶金]