| 摘要 |
Plant and process for cement clinker production includes preheating a raw meal, a calcination step where the raw meal is brought to a temperature of about 800-850° C. to substantially decompose its mineral constituents into their oxides, and a sintering step where the load is brought to a temperature of 1300 to 1450° C. to form Ca2SiO4 (or (CaO)2.SiO2), to further decompose calcium carbonate and partially melt the load to form Ca3.SiO5 (or (CaO)3.SiO2) in a rotarykiln, followed by cooling the resulting clinker, and optionally milling it, wherein untreated oil sludge is supplied into an injection zone of the calcination zone operated at a material temperature of approx. 800-850° C., the injection zone including the bottom discharge of the lowest cyclone stages and/or of the precalciner, if appropriate, the feed-in slope of the rotary kiln and the gas phase over the mineral bed at the material inlet end of the rotary kiln. |
