Method for the treatment of finely grained material, particularly for the precalcining of cement
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United States of America Patent
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-
Feb 5, 1980
Issued Date -
N/A
app pub date -
Sep 14, 1977
filing date -
Mar 10, 1975
priority date (Note) -
Expired
status (Latency Note)
Importance
Abstract
A method and mechanism for calcining cement wherein the material is preheated in a precalcining zone and a vertical conduit leads heated discharge gases upwardly from a main calcining furnace, a supply of fuel and a supply of oxygen is fed to a preoxidation zone beneath the precalcining zone and raw material is fed into an admixing area above the burner with a deflector preventing particles from falling down into the preoxidation zone with the fuel being partially oxidized so that controlled heating and controlled oxidation occurs in the precalcining zone.
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