Rapid Production of Metallurgical Coke by A Pressurized Hot-briquetting Method.

概要

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We tried to produce metallurgical coke from several non-coking and slightly coking coals by use of a hotbriquetting apparatus. Without loading pressure the coals were not caked when they were heated up to 500°C. However, the non-coking coals were caked when they were heated up to 500°C under the pressure larger than 10×10<SUP>5</SUP>Pa. The compressive strength of the cokes produced by carbonizing the caked coals up to 800°C was very strong, but the CO<SUB>2</SUB> reactivity of the cokes was very high, in comparison with a commercial coke. It is essential to load pressure on the coal between 300 and 450°C when the coal is pyrolyzed to a large extent. Thus, we could produce coke from non-coking coals, but not from coking-coals by this method. This is because the volatile matter could not be removed from coking-coals in a short time under the pressure.
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