Process for producing cement clinker containing coal ash

Details Process for producing cement clinker containing coal ash Process for producing cement clinker containing coal ash

C - Chemistry, Metallurgy

04

B

C04B 7/26 (2006.01) C04B 7/47 (2006.01)

Patent

CA 2234523

Contaminated coal ash, for example flyash contaminated with carbon is introduced to hot clinker in a cooler downstream of a cement kiln; the carbon is combusted in the cooler to provide a cement clinker having an effective content of flyash free of carbon; this permits use of flyash contaminated with carbon without the need for separate special steps for carbon removal; volatile contaminants or contaminants having a volatile component, for example adsorbed ammonia are similarly removed in the cooler by volatilization.

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