在气升式反应器中用中度嗜热混合菌浸出含砷难浸金精矿  

Bioleaching of Arsenic-Containing Refractory Gold Concentrate by Mixed Moderate Thermophiles in an Airlift Reactor

作　　者：余润兰[1,2] 吴发登[1] 陈安[1] 刘晶[1] 彭志俊[1] 季家举[1] 邱冠周[1,2] 

机构地区：[1]中南大学资源加工与生物工程学院,湖南长沙410083 [2]生物冶金教育部重点实验室,湖南长沙410083

出　　处：《当代化工》2012年第11期1160-1162,共3页Contemporary Chemical Industry

基　　金：中南大学学位论文创新项目(No.2010ssxt247);国家973项目(No.2010CB630900)

摘　　要：在分批浸出基础上,以15%矿浆浓度在气升式反应器中用中度嗜热混合菌采用半连续方式补加无铁9 K溶液浸出含砷难浸金精矿,降低体系中铁和砷离子浓度,提高含砷难浸金精矿铁砷脱除率。结果表明,在补加流量为每次333 mL时,金的氰化回收率达到90%以上,比直接氰化提高了2倍。On the basis of batch-bioleaching, semi-continuous bioleaching was used to bioleach arsenic-containing refractory gold concentrate with high pulp density by mixed moderate thermophiles in airlift reactor. Non-ferrous 9K medium was fed in batch every 8 h to decrease the concentration of iron and arsenic in the airlift reactor. The results indicate that the recovery of gold can reach up to 90% when the additional volume flow is 333 ml every time while the gold recovery of direct cyanidation of the gold concentrate is only 31%.

关 键 词：气升式反应器 难浸金精矿 半连续 生物冶金 

分 类 号：TQ131[化学工程—无机化工]