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Hokkaido University Collection of Scholarly and Academic Papers >
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石炭の加熱過程における各種パラメータの変化と軟化溶融挙動との関連
| Title: | 石炭の加熱過程における各種パラメータの変化と軟化溶融挙動との関連 |
| Other Titles: | Relationship between Variation of Parameters and Behaviors of Coals during Heating |
| Authors: | 鷹觜, 利公1 Browse this author | | 吉田, 貴紘2 Browse this author | | 飯野, 雅3 Browse this author | | 熊谷, 治夫4 Browse this author →KAKEN DB | | 加藤, 健次5 Browse this author |
| Authors(alt): | Takanohashi, Toshimasa1 | | Yoshida, Takahiro2 | | Iino, Masashi3 | | Kumagai, Haruo4 | | Kato, Kenji5 |
| Keywords: | solvent extraction | | fluidity | | mobility | | vixcoelasticity | | fusibility |
| Issue Date: | 1-May-1999 |
| Publisher: | 日本鉄鋼協会 |
| Journal Title: | 鉄と鋼 |
| Volume: | 85 |
| Issue: | 5 |
| Start Page: | 382 |
| End Page: | 386 |
| Publisher DOI: | 10.2355/tetsutohagane1955.85.5_382 |
| Abstract: | For high-caking Warkworth and low-caking K-Prima coals, Geiseler plastometry, differential scanning calorimetry (DSC), proton magnetic resonance thermal analysis (PMRTA) and dynamic viscoelasticity were measured at a heating rate of 3°C/min under nitrogen. The amount of solvent-soluble constituent of the coals heat-treated at 3°C/min was also measured by using a solvent extraction with carbon disulfide-N-methyl-2-pyrrolidinone mixed solvent at room temperature, which gives high extraction yields for the heat-treated coals in the softening range. Changes in various chemical and physical parameters from the measurements were compared with one another to investigate the mechanism of softening and fusibility of coals. We suggest that the softening is occurred by a physical relaxation of aggregates in coal macromolecular structure and the amount of the solvent-soluble constituents greatly increases, resulting in enhancing the softening and fusibility. The mobility parameter from PMRTA, the viscoelastic parameter and Geiseler fluidity gave the maximum at similar temperature, showing that fusibility is the result of increased mobility of whole coal. The dynamic viscoelastic measurement was found to be a useful and convenient means for the study on caking behaviors of coals, since it can estimate concurrently both the fluidity and the elasticity of coals. |
| Rights: | 著作権は日本鉄鋼協会にある |
| Type: | article |
| URI: | http://hdl.handle.net/2115/79502 |
| Appears in Collections: | 工学院・工学研究院 (Graduate School of Engineering / Faculty of Engineering) > 雑誌発表論文等 (Peer-reviewed Journal Articles, etc)
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Submitter: 熊谷 治夫
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