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《Nonferrous Metals》 2003-01
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Bio-desulphurization of Pyrite Calcine With Thiobacillus Ferrooxidans

LI Haoran 1, FENG Yali 2 (1 Institute of Processing Engineering, Academia Sinica, National Laboratory of Bio chemical Engineering, Beijing 100080, China; 2 Civil and Environment Engineering School, University of Science and Technology Beijing, Beijing 100083, China)  
The effects of solid concentration in the slurry, Fe 3+ concentration and pH on the free Thiobacillus ferrooxidans concentration in the solution and the desulphurization rate of the calcine are investigated by the bench test on the bio desulphurization of pyrite calcine The results show that the bio desulphurization process is the combination of the direct bacterial action on the mineral surface and the indirect leaching by the ferric ion produced in the bacteria reaction Desulphurization rate and the T f oxidative activity are influenced by the growth of T f adhered to the mineral, solid concentration in the slurry, Fe 3+ concentration and pH in the solution The bacteria oxidative activity can be interfered by the addition of ferric ion and the desulphurization is inhibited, the rate of desulphurization is decreased by the sediment of mineral surface At bio desulphurization, the content of the sulphur in the residue is decreased to 0 33%, it is consonant with the standard of the iron ore
【Fund】: 国家自然科学基金资助项目 (2 0 1760 61);; 国家高技术研究发展计划资助项目(2 0 0 1AA6490 30 )
【CateGory Index】: TF18
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