(中南大學(xué) 資源加工與生物工程學(xué)院，長沙 410083)
摘 要: 研究氧化亞鐵硫桿菌(A.f菌)從含磷鐵礦石中脫磷的可行性及工藝技術(shù)。結(jié)果表明：氧化亞鐵硫桿菌可以浸出鐵礦石中的磷，生物浸出脫磷應(yīng)選擇缺磷9 K培養(yǎng)基體系，添加黃鐵礦可強(qiáng)化細(xì)菌浸出脫磷，礦漿初始pH對脫磷率有明顯影響，合適的細(xì)菌接種量、亞鐵初始含量及礦石粒度有利于生物浸出脫磷。對某含磷1.12%的鐵礦石，以缺磷9 K培養(yǎng)基為浸出體系，添加質(zhì)量比為20%的黃鐵礦，在初始pH值為1.7~2.0的條件下，采用A.f菌進(jìn)行生物浸出，獲得的脫磷率為86.6%
關(guān)鍵字: 鐵礦石；脫磷；生物浸出；氧化亞鐵硫桿菌
（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 words: dephosphorization; iron ores; bio-leaching; Acidthiobacillus ferrooxidans(A.f)
