Carbonization of coals to produce anisotropic cokes. 3. Evaluation of low-rank bituminous and subbituminous coals by single and co-carbonizations with pitch

Yozo Korai, Yuichi Yoshida, Kenjiro Takeshita, Isao Mochida

研究成果: Contribution to journalArticle査読

2 被引用数 (Scopus)

抄録

Single carbonizations and co-carbonizations of 17 low-rank bituminous and subbituminous coals have been studied to evaluate their suitability as sources of blast furnace coke in terms of pore-wall profile and anisotropic development within the cokes. Co-carbonizations suggest the possible use of low-rank coals which from single carbonizations would not have been considered suitable. To evaluate semi-quantitatively the coke quality, two structural characteristics of the cokes produced by single and co-carbonizations are graded on a scale of 1 to 5. Overall assessments for each coal are plotted against the atomic H/C and 0/C ratios of the original coals. Although there are a few exceptions, coals with similar assessments are located in the same region of the plot, indicating that, to a first approximation, the H/C and 0/C ratios are suitable indicators of the single and co-carbonization properties of a coal. The presence of cations in the coal appears to be an additional factor influencing the carbonization properties and may explain the exceptional behaviour of some coals. Removal of these cations by pretreatment of the coals improves the carbonization properties.

本文言語英語
ページ(範囲)649-658
ページ数10
ジャーナルFuel
62
6
DOI
出版ステータス出版済み - 1 1 1983

All Science Journal Classification (ASJC) codes

  • 化学工学(全般)
  • 燃料技術
  • エネルギー工学および電力技術
  • 有機化学

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