Control of the Particle Size Distribution of Coke Breakage Product by Means of Coal Crushing
Masaru NISHIMURA, Kanji MATSUDAIRA, Takashi YOKOYAMA, Shingo ASADA
Coke samples were produced by using of electrical coke test oven (300 kg charge). Packing density was varied (Series 1). And Crushing weight ratio (<3 mm) of A coal which had high inertinite content ratio was varied, and packing density of blended coal containing A coal was varied in those tests (Series 2). Produced coke samples were investigated by a drum tester according to the JIS method. Size distributions of coke breakage products smaller than 15 mm sieve size were investigated after the drum test. The results are summarized as follows.
(1) There was a close correlation between weight of coke breakage products smaller than 1 mm sieve size and packing density of charged coal.
(2) There was a close correlation between weight of coke breakage products (115 mm sieve size) and weight ratio (<3 mm) of crushed A coal in blended coals.
These results show that the primary factor which controls the weight of coke breakage products is different in each breakage particle size fraction. Based on these results, size distribution of coke breakage products generated by mechanical impact can be controlled by the conditions of crushing operation of coals.
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