| 摘要 |
The invention relates to the production of cement clinker in a dry process wherein the raw material is ground in a raw mill (20) to form cement raw meal, the raw meal is preheated in a raw meal preheater (16) and is precalcinated in a calcinator (14), the remainder of the hot meal is calcinated in a rotating kiln (12) and is burnt to form cement clinker. The cement clinker in cooled in a grate cooler (10), the waste gas of the rotating kiln (12) is guided to the calcinator (14) and the primary air is guided to the rotating kiln (12) by means of a primary air ventilator (36). Said system can be operated in a combined operation with raw meal grinding and in a direct operation without raw meal grinding. In the combined operation of the rotating kiln (12), the raw meal prewarmer (16) and the raw mill (20) work in a gas compound, in which the hot gas of the raw meal prewarmer (16) is guided to the raw mill (20) and is then released into the open as waste gas by a waste gas flue (30). In direct operation, the hot gas of the raw meal prewarmer (16) is directed past the raw mill (20) to the waste gas flue (30). In the combined operation, one part of the waste gas is guided to the rotating kiln (12) as primary air and in the direct operation, one part of the waste gas is guided together with the fresh air to the rotating kiln (12) as primary air. |
