Phase Transformation of Coal at High Temperature

Abstract:

Anthracite and bitumite were processed respectively at 1400°C,1700°C, 2000°C, 2200°C, 2400°C and 2600°C,and their chemical composition,resistivity,microstructure, phase composition,and the internal migration of molecular functional group were tested and characterized. The results indicate that moisture, ash and volatile in coal have gradually shifted and lost with the elevation of heat treatment temperature, while the higher temperature, the quicker and completer phase change. Heat treatment can make the coal transform from approximately insulative phase to conductive phase,. Furthermore, as the temperature increases, the conductive phase transformation effect is better. The higher the heat treatment temperature of coal, the more amorphous carbon transforming into crystalline carbon completely, but the less types of phases .

• Periodical: Materials Science Forum (Volumes 809-810)
• Pages: 815-821
• DOI: https://doi.org/10.4028/www.scientific.net/MSF.809-810.815
• Online since: December 2014
• Authors: Xiao Hu Hua*, Xiao Gang Wang, Jia Qing Yang, Shu He Lu, Li Rong Deng, Li Bin Niu, Zi Min Fan, Jia Bo Wang
• Keywords: Anthracite, Bitumite, High Heat Treatment Temperature, Microstructure, Phase

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