Process and apparatus for calcining solids or sludges
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United States of America Patent
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Nov 16, 2010
Issued Date -
N/A
app pub date -
Nov 2, 2007
filing date -
Nov 7, 2006
priority date (Note) -
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Abstract
The invention relates to a process and an apparatus for calcining solids or sludges in a multiple-deck furnace having a firing region, which has at least one upper heated hearth and at least one lower heated hearth, and having a cooling region, which is provided with one or more unheated hearths, material to be calcined passing first into the firing region and then into the cooling region. A portion of the material to be calcined is delivered to the at least one lower heated hearth and/or to the cooling region, bypassing the at least one upper heated hearth of the firing region.
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