Effect of Natural Flake Graphite Characteristics on Spherical Processing
The flotation graphite concentrate and its spheroidized products from Luobei(LB),Shuangyashan(SYS),Jixi(JX)and Jilin(JL)were studied.And its state of gangue,slice diameter,flake thickness and crystallization degree were analyzed by polarizing microscope,SEM and XRD to explore the influence of natural flake graphite characteristics on spheroidization graphite products.The results show that the fixed carbon contents of graphite flotation concentrate in the four regions are JX＞JL＞SYS＞LB,while the sheet diameters are JX＞LB＞JL＞SYS.During spheroidization,gangue minerals are coated,which deteriorates product quality.Within a certain range of particle size,the spheroidal effect of large scale graphite is better.And the spheroidized particles of the thick graphite flake are more"solid",whereas the internal defects are more.In the process of spheroidization,the stability degrees of graphite interlayer structure are LB＞SYS＞JL＞JX.Among them,LB graphite has better spheroidal effect and is more suitable for preparing spherical graphite.
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