Method for multi-step calcination of cement clinker
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United States of America Patent
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-
Jan 15, 1980
Grant Date -
N/A
app pub date -
Mar 21, 1978
filing date -
Mar 21, 1977
priority date (Note) -
Expired
status (Latency Note)
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Abstract
A method for the production of cement from raw material to the clinker stage. The raw material is first heated using waste heat from subsequent stages of this process. The heated raw material is then passed into a precalcining stage in which the raw material is partially calcined. The calcination is then completed in an after-calcining stage wherein heat is provided by the combustion of a fuel. The material is next passed to a kiln for conversion to clinker, and is then cooled in a cooling stage. Air for the combustion and the after-calcining stage and in the kiln is supplied from the cooling stage.
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