| 摘要 |
A major portion of raw material converted into clinker in a rotary tubular kiln is preheated by hot gases recovered from the kiln. The clinker is cooled in a cooler to which fresh air is delivered. The fresh air is heated in heat exchange contact with the clinker and fresh air thus heated to a temperature of 900 DEG C. to 1000 DEG C. is removed from the cooler and brought into heat exchange contact with a minor fraction of the raw material, thus at least partially calcining the raw material fraction and simultaneously cooling the air. The at least partially calcined raw material fraction is introduced into the kiln and at least a portion of the cooled air is delivered with the fresh air to the clinker.
|
