63.高温抽出したハイパーコールの軟化溶融性とコークス強度

概要

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Hyper-coal (HPC) is an ash-free coal produced by the solvent de-ashing technology. HPC has multi purpose quality for various uses. Especially, HPC has a large potencial for coke additive to make an strong coke in a high blending ratio of low rank coals, which is non or slightly coking coal. We have been optimising the process conditions to make an suitable HPC as the coke additive. In addition, it is important to make HPC from low rank coals, which cannot be used for a coke material. HPC from the low rank coal is inclined to have lower resolidification temperature than a strongly coking coal. It has some fear to prevent the fluidity of the blending coals and result to the low-strength coke. Comparing to the standard extraction conditions (360-380℃ for 40-60min.), the highere temperature (>380℃) extraction is effective to change the resolidification temperature higher, but it causes to a lower HPC yield and lower strength of coke by the excess thermal history. Finery, we find oud that the high temperature (>400℃) and short contact treatment is effective to improve both HPC yield and coke strength.
社団法人日本エネルギー学会の論文
2006-10-12