Characterization of the Hot-Pressed Coal Briquettes Prepared with the HyperCoal
Due to the high compressive strength and good thermal ability, the hot-pressed coal briquette prepared with the HyperCoal is considered to be an excellent alternative fuel for the lump coal in the COREX. In this paper, state changes of GD-coal and KL-HyperCoal during the heating process were observed in situ through an ultra-high temperature laser confocal microscope. Compared with GD-coal, KL-HyperCoal has an excellent thermoplasticity, which contributes to the preparation of the hot-pressed coal briquettes with high mechanical strength. The Raman spectra and infrared spectra analysis were used to investigate the material structure of the hot-pressed coal briquettes. It is proved that increasing the hot-pressing temperature can improve the compressive strength, while extending the holding time period can hardly change the compressive strength. The above results indicate that HyperCoal can be used as a binder to effectively improve the performance of the hot-pressed coal briquettes.
KeywordsHyperCoal Coal briquette Hot-pressed Infrared spectra Raman spectra
The present work was supported by the National Natural Science Foundation of China (No. 51574023) and the National Key Research and Development Program (2016YFB0600701).
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