Specific Adsorption of Coal-cleaning Bacterium onto Pyrite and/or Sporenite and Desulfurization of Coal.

利用氧化亚铁硫杆菌的黄铁矿氧化活性进行煤的脱硫浸出需要2周以上的时间，而利用细菌吸附黄铁矿颗粒的微球性变化进行脱硫浸出的新工艺只需几分钟。将煤进行细化（<100、100 -200、<200目）后，将煤浆与细菌悬浮液混合。细菌细胞被吸附在煤中黄铁矿颗粒上，使其表面能由亲水态转变为亲水态。本研究建立的浮选柱可将表面改性后的黄铁矿颗粒从煤浆混合物中分离出来。通过改变细菌投加量、洗涤剂浓度、煤种等条件，对分离效果进行了研究。通过脱硫和碳回收率的测定，得到了最佳操作和/或矿浆条件，Illnois煤的操作点与天福煤的操作点不同。最佳操作点对粒径分布影响最大。

Although the desulfurization and leaching of coal by the use of pyrite-oxidizing activity of Thiobacillus ferrooxidans needed more than 2 weeks, while a new technology required only several minutes, the principle of which was hydrophorbisity change of pyrite particles adsorbed by the bacterium. After fining of coal (<100,100-200, <200 mesh) , the coal pulp was mixed with the bacterial suspension. The bacterial cells was specifically adsorbed onto only pyrite particles originated from coal and the surface energy of the particles were changed from hydrophorbic to hydrophilic state. A Floating column constructed in this study could separate the pyrite particles of which surface was changed to hydrophilic from the coal pulp mixuture. The separation was investigated through changing several conditions such as bacterial dosage, detergent concentration, coal species, etc. The measurements of desulfurization and carbon recovery gave the optimum operation and/or pulp condition, and the operation point for Illnois coal was different from that for Tenfu (Chinese) coal. The particle size distribution was most influenced the optimum operation point.