Method for firing a rotary kiln with pulverized solid fuel
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United States of America Patent
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Jun 14, 1983
Issued Date -
N/A
app pub date -
Sep 2, 1981
filing date -
May 5, 1980
priority date (Note) -
Expired
status (Latency Note)
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Abstract
Disclosed is a method for firing a kiln as well as a method for producing cement clinker in which pulverized coal is initially entrained in an airflow of about 2% of the theoretical amount of air needed to combust the coal and transport it to a burner. Supplemental primary air heated sufficiently to vaporize volatiles in the coal is mixed with the coal flow in a burner, discharged into the kiln and hence ignited. Secondary combustion air heated to between 800.degree. F. to 1650.degree. F. and more is added in the kiln to effect the substantially complete combustion of the pulverized coal in the kiln.
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