| 摘要 |
<p>A combination of raw coal and water is introduced as a slurry (23) into a vessel (12). Chemicals are introduced at a feed inlet. The mixture is reduced by interaction with a bed of agitated (15,16) grinding balls (14). Air is introduced into the lower portion of the vessel and forced upwardly through the circuitous passages among and between the grinding balls. The rising air bubbles carry the more hydrophobic product upwardly into a froth compartment (34) of the vessel (12) and through a discharge outlet (36) of the vessel. Wash water (37) is introduced into the upper portion of the vessel and descends through the froth and the ball passages carrying entrained and less hydrophobic particles into the grinding chamber (40). The non-floatable material flows downwardly from the grinding chamber (40) to a refuse zone (42) for discharge (45) as refuse from the vessel. <IMAGE></p> |
