The Effect of Vibration and Reactive Addition on Dewatering of Coal Fines
At the present time, methods of mining and coal preparation produce tones of coal fines. The removal of water from these fines is necessary for economical and technological reasons. Supplementary processes that utilize different physical and chemical methods have been developed to increase the productivity of mechanical dewatering processes. Researches have shown that chemical reagents used along with conventional systems diminish moisture and increase the capacity and the yields of the dewatering method.In this study, the parameters of the vibrating screen (incline, frequency, feeding rate and screen size), the effects of the application of additional vertical mechanical vibration and surface active reagents (CTAB, SDS, Umectante B-70 and Kerosene) were investigated. At the end of the optimization experiments, 61.0% moisture was decreased to 42.3%. By keeping optimum conditions constant, the experiments have been conducted to determine most effective reagent. 41.2% moisture has been obtained with 5 g/t CTAB at the normal pH of the pulp, which were 7.25. By using vibrating screen with combination of the vertical vibrating mechanism, CTAB gave the best result of 40.7%moisture. Finally, the effect of increased surface area of the screen has been investigated and decreased the moisture level to 38.7%.
Vibrating screen mechanism Coal fines Dewatering Chemical reactive Data analyses
F. Burat H. Dincer G. (O)nal
Mineral Processing Department, Istanbul Technical University, Istanbul, Turkey
国际会议
XXIV International Mineral Processing Congress(第24届国际矿物加工大会)
北京
英文
2123-2128
2008-09-24（万方平台首次上网日期，不代表论文的发表时间）