Process for incorporating coal ash into cement clinker

Details Process for incorporating coal ash into cement clinker Process for incorporating coal ash into cement clinker

C - Chemistry, Metallurgy

04

B

C04B 7/43 (2006.01) C04B 7/44 (2006.01) C04B 7/48 (2006.01) F27B 7/20 (2006.01)

Patent

CA 2453124

A method of cement clinker manufacture comprises feeding a clinker feed material containing a source of calcium carbonate into a feed end of a cement kiln, the feed material is heat processed in the kiln to produce cement clinker with emission of carbon dioxide from thermal decomposition of said source of calcium carbonate and discharge of the carbon dioxide from the kiln, and cement clinker is discharged from a discharge end of the kiln; a coal ash derived from burning pulverized lignite or sub- bituminous coal is included in the feed material fed into the feed end to replace a portion of the source of calcium carbonate, and provides a source of calcium as well as other components notably silicon and aluminium, in the formation of the cement clinker, with a lowering of the emission of carbon dioxide in the kiln, per unit weight of cement clinker produced.

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