| 摘要 |
<p>Granular sweepings for underground mining, which arise as residue in the combustion according to the fluidised-bed principle, are contained in a building material for undergound use to the extent of 5 to 35% by weight, preferably 19 to 22% by weight, and are extracted as bed ash after the fluidised bed and are added alone, without prior mixing with other residues from the fluidised-bed furnace, to the finely granular building material, and the bed ash is mixed in the dry state, wholly or partially, with the other ashes of the fluidised-bed furnace from a filter and/or a cyclone separator and then added to the finely granular building material, or the residues are individually transported to the place of addition to the building material and then mixed together with the latter.</p> |
