冶金用コークスの気孔壁強度の評価(<特集>コークスプロセス工学の展開)

概要

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Quantitative estimation method for pore partition strength of metallurgical coke was studied with mercury porosimetry. Two peaks were observed in the relationship between intrusion pressure and differential intrusion volume that was measured for a piece of coke sample. One peak occurred because of intrusion to open pores in coke and the other peak occurred because of intrusion to the pores generated by breakage of pore partitions of closed pores. This phenomenon was clarified based on the difference between the result of a piece of coke sample and crushed sample, and based on the observation of coke sample surface with SEM. Therefore, it was ascertained that the pore partition strength could be estimated by quantification of pressure distribution of intrusion resulted from breakage of closed pore partition. The pore partition strength was measured according to this method for a couple of coke sample. The values of pore partition strength were in the range of 0.74∿3.08 MPa from these measurements, and the pore partition strength became larger with the thickness of pore partition and with the coal rank.
社団法人日本鉄鋼協会の論文
1996-05-01