No.2 軟化溶融石炭の浸透距離がコークス品質に及ぼす影響

概要

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In this study, a new measurement method for coal plasticity was developed, where permeation distance of thermally plastic coal into glass beads layer placed on the coal sample was measured, because conventional coal plasticity such as Gieseler Fluidity had some problems. The characteristics of this method was simulating the condition in a coke oven, especially void structure around the plastic layer by glass beads and coking pressure by applying the load. In a standard condition, the coal sample was heated to 550℃, and coal sample softened and permeated into the glass beads layer, then the permeation distance was measured by image analysis technique. The maximum permeation distance measured was roughly correlated with Gieseler Fluidity, but large deviation was observed especially for high fluidity coals. Moreover, deterioration of coke strength was observed in case that high permeation distance coal was used in a coal blend for cokemaking. This new measurement method clearly showed the difference in coking property of high fluidity coal as well as solving the problems in Gieseler Test for evaluating high fluidity coals.
2013-10-21