| 摘要 |
<p>Process as described in which the extraneous matter is in particular pollutants such as PCB, oil and similar, as well as useful materials such as coal and the like. The bulk material concerned is mixed with washing compounds such as water, tensides and the like and mechanically agitated. The process in accordance with the invention is characterized in that the mixture of bulk material and washing compound is exposed to powerful agitation, whereby the extraneous matter is separated under the effect of high-energy impacts, and that the bulk material, extraneous matter and washing compounds are then separated. Furthermore, the bulk material thus treated can be subjected to further washing with water in order to remove any remaining extraneous matter. The apparatus for performing the process is based on essentially vertical impact walls, in the form of turns of an endless screw (2), arranged inside a tubular container (1) with an essentially horizontal axis (8), said screw being rotated by means of a rotary drive (3) and linear drive (4) and simultaneously displaced with a back and forth jolting movement in order to separate in this way the extraneous matter from the bulk material by the action of high-energy impacts.</p> |
