Fine Coal Dry Cleaning using an Air Dense Medium Fluidized Bed with Improved Magnetite Medium. (2015)

• Record Type: Journal Article
• Authors: Zhao, Yuemin; Fu, Zhijie; Yang, Xuliang; Luo, Zhenfu; Duan, Chenglong; Song, Shulei; Cai, Luhui
• Is Part Of: Procedia engineering. Volume 102(2015)
• Page Start: 1133
• Page End: 1141
• Publication Date: 2015
• Subjects: Air dense medium fluidized bed -- Fine coal cleaning -- Minimum fluidization velocity -- Dry coal beneficiation;; Engineering -- Congresses; Engineering -- Periodicals; Engineering; Conference proceedings; Periodicals; 620.005
• DOI: 10.1016/j.proeng.2015.01.236
• Languages: English
• ISSNs: 1877-7058

Abstract

Abstract: Coal beneficiation using air dense medium fluidized bed offers a number of advantages and provides an efficient solution for coal cleaning in a dry way. Recently, the development of the air dense medium fluidized bed mainly concentrate on the coarse coal (+6 mm), and it is also reported that fine coal (-6 mm) is hard to be separated by conventional magnetite medium. The objective of this study is to using four types of magnetite powders with different narrow size range to separate -6+3 mm fine coal. The pressure-drop performance of the different magnetite medium in fluidized bed was also experimentally studied. The results show that the finer magnetite powders have a lower pressure-drop and minimum fluidization velocity than the coarse magnetite powders, and the -6+3 mm fine coal can be separated effectively by -0.15+0.074 mm magnetite powders, which will expand the lower separation limit of the air dense medium fluidized bed.