Abstract
To monitor changes in the fissure density in the interior of coke, pieces of an industrial metallurgical coke,were examined before and after heat treatment and gasification in carbon dioxide at 1173 K, using an ultrasonic non-destructive method (PUNDIT). Seven coke pieces were heat treated to 1173 K in nitrogen and six showed increases in pulse velocity of 30–40%. Ten coke pieces were gasified at 1173 K in carbon dioxide and all showed decreases in pulse velocity of about 10%. The effects of extended heat treatment and gasification are reported.
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