高磷赤铁矿两步法生物除磷实验研究  

Experimental Study on a Two-step Bioleaching Removal of Phosphorus from High-phosphorus Iron Ore

作　　者：钟乐乐[1] 龚文琪[1] 李育彪[1] 王楠[1] 陆玉[1] 刘时健[1] 张鹏超[1] 

机构地区：[1]武汉理工大学资源与环境工程学院,武汉430070

出　　处：《武汉理工大学学报》2012年第4期67-71,共5页Journal of Wuhan University of Technology

基　　金：国家科技部国际合作专项基金(111-46110401);"十一五"国家科技支撑计划(2007BAB15B01)

摘　　要：采用嗜酸氧化硫硫杆菌(At.t)直接浸出和两步法浸出,对鄂西高磷鲕状赤铁矿(铁品位43.50%,磷含量0.85%)进行生物除磷的实验研究。结果表明:矿浆浓度为2%时,At.t菌直接浸出除磷率为62.35%,且硫含量高达28.57%;采用两步法摇床培养At.t菌,24d菌液pH值接近0.8,磷含量可降至0.15%,硫含量为1.09%;采用自行设计制作的生物反应器培养At.t菌8d,菌液pH值接近0.98,分离菌液浸出原矿12h磷含量为0.18%。对磁选精矿进行的两步法浸出表明,当矿浆浓度为3%以下时菌液的除磷效果明显。Acidithiobacillus thiooxidans（At.t） was used in bioleaching removal of phosphorus from the high-phosphorus iron ore（iron grade 43.50%,p content 0.85%） by direct bioleaching and two-step bioleaching,respectively.The experimental results showed that with the pulp density of 2%,by direct bioleaching the phosphorus removal rate reached 62.35% and the sulfur content reached up to 28.57%;At.t bacteria were used in bioleaching removal of phosphorus by the two-step bioleaching in a shaking table.After 24 d,the pH of the bacteria solution was close to 0.8,the phosphorus concentration was reduced to 0.15%,and the sulfur content was reduced to 1.09%.After cultivation in the self-fabricated bioreactor for 8 d the pH of the At.t solution was close to 0.98.The phosphorus concentration of the iron ore was reduced to 0.18% after leaching in the supernatant of the bacteria solution for 12 h.The bioleaching of the magnetic separation concentrate by the two-step bioleaching method showed a remarkable efficiency of phosphorus removal when the pulp density was below 3%.

关 键 词：高磷赤铁矿 生物浸出 两步法 除磷 

分 类 号：TD925.5[矿业工程—选矿]