含钴矿石摇瓶生物浸出比较试验的研究

对含钴矿石进行了工艺矿物学研究，明确了该含钴矿石的主要化学成分、粒度分布、矿物组成与嵌布特征.研究表明，硫化矿物主要为硫铜钴矿、黄铜矿、斑铜矿、辉铜矿、铜蓝、黄铁矿等.硫铜钴矿大多数以单体形式赋存，还有一部分为连生体.该含钴矿石含钴163%，铜105%，铁124%，硫1500%.用实验室驯化培养的具有良好抗钴性能的ZY101菌种对此含钴矿石进行摇瓶浸出实验研究，浸出结果表明:利用优良菌种浸出，钴浸出率达8571%.对比生物法与非生物的高铁溶液浸出，生物法钴浸出率提高6326%，耐钴ZY101浸矿菌浸钴效果显著.

Comparison of the Bioleaching and Chemical Leaching of Cobaltiferous Ores

The cobaltiferous ores were studied by the process mineralogy for their main composition， ore particle size distribution， contents of primary elements and mineral dissemination characteristics. The results showed that the main content of the sulfide ores was carrollite that most of them were in monomer form， while a part of them were intergrowth with other ores. The copper ores were composed of chalcopyrite， bornite， chalcocite， covellite. The ferric sulfide is pyrite primarily. The cobaltiferous ores were comprised of 163% cobalt， 105% copper， 1500% sulfur and 124% iron. Shaking flask experiments were used to test the leaching efficiency of the cobaltiferous ores using ZY101 bacteria which was cultured with good anti cobalt properties in the lab. The results showed that the cobalt bioleaching efficiency by bioleaching was 8571% which was 6326% higher than that by chemical leaching with high iron solution. So it was more suitable that recovery of cobalt by bioleaching than by chemical leaching， and ZY101 was favored for cobalt leaching because of its high leaching efficiency and cobalt tolerance.