【摘要】 在用硫杆菌氧化还原态硫产生硫酸来浸出磷矿的过程中,采用加入不同吐温类表面活性剂的方法,促进细菌与矿物的作用,提高浸磷率。通过测量浸矿溶液的pH值及菌浓度以及磷的浸出率来评价表面活性剂对嗜酸氧化硫硫杆菌浸磷效果的影响。研究结果表明:吐温20、吐温60和吐温80都可以使浸矿效果得到改善,其最佳用量分别为10,10和100g/m3;吐温60的效果最佳,当其用量为10g/m3时磷的浸出率比原来提高约15％。更多还原

【Abstract】 During the leaching of phosphate ore with sulfuric acid produced by the oxidation of reductive sulfur with Acidithiobacillus,different types of Tween surfactants were used to promote the interaction between the bacteria and the ore and to increase the rate of phosphate leached.The effects of the surfactants on the phosphate ore leaching with Acidithiobacillus thiooxidans were evaluated by measuring the pH value of solution,the density of bacteria cell in solution and the rate of phosphate leached.The results show that Tween 20,60 and 80 all can improve the leaching of the ore and the optimal dosages are 10,10 and 100 g/m3,respectively.The effect of Tween 60 is the best with about 15% increase of the rate of phosphate leached with a dosage of 10 g/cm3.更多还原