Process for heat treatment of coal

Details Process for heat treatment of coal Process for heat treatment of coal

F - Mech Eng,Light,Heat,Weapons

26

B

34/57

F26B 3/00 (2006.01) C10F 5/00 (2006.01) C10L 9/08 (2006.01)

Patent

CA 1125007

Abstract of the disclosure: In a process for heat treatment, highly hygroscopic coal, with a low carbon content and large equilibrium moisture, is rapidly heated with hot gas at a rate of temperature rise of at least 100°C/min up to a final heating temperature in the range of 300° - 500°C, and is then rapidly cooled at a rate of temperature drop of at least 50°C/min to 250°C or below. As the hot gas, an inert gas whose oxygen concentration is not higher than 4 % by volume is employed. The hot gas is either caused to contain not less than 20 % by volume of steam or composed solely of the steam.

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