Process for producing cement clinker containing coal ash
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United States of America Patent
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Nov 17, 1998
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N/A
app pub date -
Apr 10, 1997
filing date -
Apr 10, 1997
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Abstract
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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