Method of recycling cement kiln dust
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United States of America Patent
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Issued Date -
Mar 4, 2004
app pub date -
Sep 3, 2002
filing date -
Sep 3, 2002
priority date (Note) -
Abandoned
status (Latency Note)
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Abstract
A method of recycling cement kiln dust (CKD) generated during the direct manufacturing of cement. The recycling process utilizes the creation of a flowable slurry comprising CKD, a process aid, optionally other raw materials and water. The process aid is selected from the group consisting of sucrose, raffinose, lignin, methylglucopyranoside, lactose, fructose, sodium polyphosphate, trehalose and mixtures thereof, and is added to increase the flowability of the slurry and thereby simplifying recycling. The slurry is reintroduced into the cement kiln, wherein it is burned to create cement clinkers, that are subsequently ground to the fineness required for hardening when reacted with water.
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