The relationship between pore partition property and the drum strength of coke was investigated.
The structure of coke made from the high and the medium fluidity coal consists of the pore with the size ranging from 10 to ca.500 μm and the pore partition. The pore partition in coke specimens is destroyed by the impact during the drum strength test, and coke is partially abraded. Therefore the size of coke powder meets that of pore partition, i. e. the larger the pore partition the larger the coke powder.
The total weight of the coke powder, which agreed with the drum strength, was calculated by multiplying the number and the mean weight of each coke particle.
When the thickness of pore partition is large, the number of coke powder is decreased. However, since the mean weight of each coke particle is increased, the total weight of coke powder is not always decreased by simply increasing the thickness of pore partition.
