Ya-jie Wang, Hai-bin Zuo, Jun Zhao,  and Wan-long Zhang, Using Hyper Coal to prepare metallurgical coal briquettes via hot-pressing, Int. J. Miner. Metall. Mater., 26(2019), No. 5, pp. 547-554. https://doi.org/10.1007/s12613-019-1763-3
Cite this article as:
Ya-jie Wang, Hai-bin Zuo, Jun Zhao,  and Wan-long Zhang, Using Hyper Coal to prepare metallurgical coal briquettes via hot-pressing, Int. J. Miner. Metall. Mater., 26(2019), No. 5, pp. 547-554. https://doi.org/10.1007/s12613-019-1763-3
Research Article

Using Hyper Coal to prepare metallurgical coal briquettes via hot-pressing

+ Author Affiliations
  • Corresponding author:

    Hai-bin Zuo    E-mail: zuohaibin@ustb.edu.cn

  • Received: 25 June 2018Revised: 16 September 2018Accepted: 25 September 2018
  • HyperCoal was prepared from low-rank coal via high-temperature solvent extraction with N-methylpyrrolidone as an extraction solvent and a liquid-to-solid ratio of 50 mL/g in a high-temperature and high-pressure reactor. When HyperCoal was used as a binder and pulverized coal was used as the raw material, the compressive strength of the hot-pressed briquettes (each with a diameter of 20 mm and mass of 5 g) under different conditions was studied using a hot-pressing mold and a high-temperature furnace. The compressive strength of the hot-pressed briquettes was substantially improved and reached 436 N when the holding time period was 15 min, the hot-pressing temperature was 673 K, and the HyperCoal content, was 15wt%. Changes in the carbonaceous structure, as reflected by the intensity ratio between the Raman G- and D-bands (IG/ID), strongly affected the compressive strength of hot-pressed briquettes prepared at different hot-pressing temperatures. Compared with cold-pressed briquettes, hot-pressed briquettes have many advantages, including high compressive strength, low ash content, high moisture resistance, and good thermal stability; thus, we expect that hot-pressed briquettes will have broad application prospects.
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