Kiln plant control system
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United States of America Patent
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-
Sep 14, 2004
Grant Date -
N/A
app pub date -
Jan 21, 2003
filing date -
Nov 4, 1999
priority date (Note) -
Expired
status (Latency Note)
Importance
Abstract
A controller for a kiln plant, typically a cement plant, has a thermodynamic controller which measures a number of variables including the kiln hood temperature and one or more output gas concentrations, and controls the fuel input to the kiln to maintain the hood temperature within a desired range and a main impeller of the kiln to maintain the measured gas concentrations within a predetermined range. The invention includes a quality controller wich controls the amount of 3CaO.SiO.sub.2 present in clinker produced by the plant. The controller comprises an inner controller which controls free-lime content in the clinker and a thermodynamic outer controller.
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