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Influence of kneading ratio on the binding interaction of coke aggregates on manufacturing a carbon block

  • Carbon Letters
  • Abbr : Carbon Lett.
  • 2018, 28(1), pp.24-30
  • Publisher : Korean Carbon Society
  • Research Area : Natural Science > Natural Science General > Other Natural Sciences General

KIM JONGGU 1,  Ji Hong Kim 2,  Byong Chol Bai 3,  choi yun jeong 2,  Im Ji Sun 2,  배태성 4,  Lee, Young-Seak 1

1충남대학교
2한국화학연구원
3에코융합섬유연구원
4한국기초과학지원연구원

Accredited

ABSTRACT

Coke aggregates and carbon artifacts were produced to investigate the interactions of coke and pitch during the kneading process. In addition, the kneading ratio of the coke and binder pitch for the coke aggregates was controlled to identify the formation of voids and pores during carbonization at 900°C. Experiments and thermogravimetric analysis revealed that carbon yields were improved over the theoretical yield calculated by the weight loss of the coke and binder pitch; the improvement was due to the binding interactions between the coke particles and binder pitch by the kneading process. The true, apparent, and bulk densities fluctuated according to the kneading ratio. This study confirmed that an excessive or insufficient kneading ratio decreases the density with degradation of the packing characteristics. The porosity analysis indicated that formation of voids and pores by the binder pitch increased the porosity after carbonization. Image analysis confirmed that the kneading ratio affected the formation of the coke domains and the voids and pores, which revealed the relations among the carbon yields, density, and porosity.

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