氧化亚铁硫杆菌浸出铁矿石脱磷技术-中国有色金属学报.PDF

第 17 卷第 10 期 中国有色金属学报 2007 年 10 月 Vol.17 No.10 The Chinese Journal of Nonferrous Metals Oct. 2007 文章编号：1004-0609(2007)10-1718-05 氧化亚铁硫杆菌浸出铁矿石脱磷技术 姜 涛，金勇士，李 骞，杨永斌，李光辉，邱冠周 ( 中南大学 资源加工与生物工程学院，长沙 410083) 摘 要：研究氧化亚铁硫杆菌(A .f 菌)从含磷铁矿石中脱磷的可行性及工艺技术。结果表明：氧化亚铁硫杆菌可以 浸出铁矿石中的磷，生物浸出脱磷应选择缺磷 9 K 培养基体系，添加黄铁矿可强化细菌浸出脱磷，矿浆初始 pH 对脱磷率有明显影响，合适的细菌接种量、亚铁初始含量及矿石粒度有利于生物浸出脱磷。对某含磷 1.12%的铁 矿石，以缺磷 9 K 培养基为浸出体系，添加质量比为 20% 的黄铁矿，在初始pH 值为 1.7~2.0 的条件下，采用A .f 菌进行生物浸出，获得的脱磷率为 86.6%。 关键词：铁矿石；脱磷；生物浸出；氧化亚铁硫杆菌 中图分类号：TF 111.31 文献标识码：A Dephosphorization technology of iron ores by Acidthiobacillus ferrooxidans JIANG Tao, JIN Yong-shi, LI Qian, YANG Yong-bin, LI Guang-hui, QIU Guan-zhou (School of Minerals Processing and Bioengineering, Central South University, Changsha 410083, China) Abstract: The feasibility and technology on dephosphorization from phosphorous iron ores by bio-leaching were investigated. The results show that Acidthiobacillus ferrooxidans (A .f ) can remove phosphor from iron ores and nutrient medium without phosphorus is more effective for the removal than that with phosphorus. The addition of pyrite greatly improves the dephosphorization, and the lower initial pH of slurry and suitable concentrations of the bacterium as well as appropriate particle size of iron ores are favorable to the dephosphorization. For an iron ore bearing 1.12% P, a dephosphorization of 86.6% is attained under the conditions of the pyrite addition of 20%(mass ratio), initial pH of 1.7−2.0, and nutrient medium without phosphorus. Key wor