| 摘要 |
<p>A pumpable coal suspension to be used in the hydrogenation under high pressures maintains in a mixture condition a mass of dust coal in a boiling oil at about 200oC, so that the pumping limit of the suspension is not exceeded. The suspension is treated during 0.5-15 minutes at a temperature of 280-450oC, if necessary under high pressure. During this treatment, a new quantity of coal dust is mixed without however exceeding the pumping limit. If necessary, the suspension after mixing the new mass of coal dust may be subjected to a new thermal treatment. Thereby, suspensions with a higher coal content are produced, without loosing the pumpability or without the occurcence of baking as a result of the increase of the hydrogenation temperature.</p> |
