No.39 粘結材添加がコークス原料炭の軟化溶融挙動に及ぼす影響(研究発表)

概要

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This study aim to investigate the effects of HPC addition on the thermoplasticity of coal blends. The thermolasticity of coal blends with HPC were monitored with in-situ high temperature ^1H-NMR relaxation measurement. The solid echo pulse sequence was employed to generate ^1H-NMR transverse relaxation signals. The echo signals obtained during heat treatment under a flow of nitrogen at a heating rate of 3K/min were deconvoluted into a set of one Gaussian and two Exponential decay components which represent the immobile, intermediate and mobile component, respectively. The changes in the fractional intensity of mobile component, fHm, calculated from the signals well corresponded to the softening and resolidification phenomena of coal blends. The fHm and molecular mobility of mobile component represented by Spin-Spin relaxation time, T2Hm, increased with HPC addition at lower temperature range. At higher temperature range, that is thermoplastic temperature range, fHm and T2Hm shows almost the same value as those for original coal blends. These results indicate that the HPC can be added as a substitution for coking coals.
2011-10-27