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《Hydrometallurgy of China》 2013-04
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Experimental Study on Microbial Desulfurization of Pyrite Cinder

ZHOU Wen-bo,ZOU Ping,SUN Pei-shi(Research Institute of Engineering and Technology,Yunnan University,Kunming 650091,China)  
The mixed culture of acidophilic bacteria was used to remove sulfur from pyrite cinder.The effects of different culture mediums,solid-liquid ratio,pH,inoculum volume,surfactant usage,temperature and particle size on the desulfurization rate were examined by shake flask experiments.The results indicated that the optimal conditions of desulfurization were solid-liquid ratio of 3∶10,inoculation amount of 3%,pH of 1.5,rotation speed of 180 r/min and temperature of 25 ℃.After 72 hours leaching,the total sulfur content in the pyrite cinder was reduced significantly from 1.78% to 0.28% with a desulfurization rate of 86.02%,and iron content was enriched effectively from 53.78% to 59.56%.The desulfurization slag meet the requirements of ore concentrate for steelmaking.
【CateGory Index】: TF18
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