| 摘要 |
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 DEG C./min up to a final heating temperature in the range of 300 DEG -500 DEG C., and is then rapidly cooled at a rate of temperature drop of at least 50 DEG C./min to 250 DEG 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. |
