| 摘要 |
<p>Crude cement flour is fed down a preheating cyclone and into an air stream, which carries the preheated flour into the inlet end of a rotary drum furnace, in which the flour is decarbonised in a fluidised state by hot gases provided by a fuel burner in the exit end of the drum; the hot gases thus flow in counter current to the flour. The decarbonised flour then flows backwards out of the inlet end of the drum into a separator, from which the gases travel into the preheating cyclone, whereas the flour is returned to the lower part of the inlet end of the drum, and is roasted to obtain clinker. A single drum furnace is used both for decomposing the carbonates in the crude flour, and for making the clinker, so the dimensions of the plant can be reduced, and the amt. of fuel required substantially decreased to 750 kcal/kg clinker obtd..</p> |
