Xiao-min You, Xue-feng She, Jing-song Wang, Qing-guo Xue, and Ze-yi Jiang, Preparation of CaO-containing carbon pellets from coking coal and calcium oxide: Effects of temperature, pore distribution and carbon structure on compressive strength in pyrolysis furnace, Int. J. Miner. Metall. Mater. https://doi.org/10.1007/s12613-021-2255-9
Cite this article as:
Xiao-min You, Xue-feng She, Jing-song Wang, Qing-guo Xue, and Ze-yi Jiang, Preparation of CaO-containing carbon pellets from coking coal and calcium oxide: Effects of temperature, pore distribution and carbon structure on compressive strength in pyrolysis furnace, Int. J. Miner. Metall. Mater. https://doi.org/10.1007/s12613-021-2255-9
Research Article

Preparation of CaO-containing carbon pellets from coking coal and calcium oxide: Effects of temperature, pore distribution and carbon structure on compressive strength in pyrolysis furnace

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  • Received: 30 October 2020Revised: 17 January 2021Accepted: 20 January 2021Available online: 22 January 2021
  • CaO-containing carbon pellets (CCCP) were successfully prepared from well-mixed coking coal (CC) and calcium oxide (CaO) and roasted at different pyrolysis temperatures. The effects of temperature, pore distribution and carbon structure on compressive strength of CCCP was investigated in pyrolysis furnace (350–750 °C). The results showed that as the roasting temperature increased, the compressive strength also increased and furthermore, structural defects and imperfections in the carbon crystallites were gradually eliminated to form more organized char structures, thus forming high-ordered CC. Notably, the CCCP preheated at 750 °C exhibited the highest compressive strength. A positive relationship between the compressive strength and pore-size homogeneity was established. A linear relationship between the compressive strength of the CCCP and the carbon layer spacing of CC was observed. Additionally, a four-stage caking mechanism was developed.
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