1-08　Effect of Coal Fluidity on Strength of Coke Made by Sequence of Pulverization, Hot Briquetting and Carbonization

Abstract

To investigate the effect of the coal fluidity on the strength of the coke made by a sequence of pulverization, hot briquetting and carbonization, the strength of coke produced from the 5 different coals with the common logarithm of the maximum fluidity (logMF) ranging from 0 to 1.61 was measured. With the increase in MF, the coke strength increased and reached a maximum peak at logMF=0.78, then decreased significantly. Based on the scanning electron microscopic observation, the coke produced from the coal with logMF=0.78 had a dense structure in comparison to the coke made from the coal with logMF=1.52. The porous structure of the coke made from the coal with logMF=1.52 was estimated to be due to the excessive foaming during the coal plasticity.