Patent ID: 6790034
Filing Date: 2004-09-14
Classification: C04B,F27B,Y02P

Abstract:
A controller for a kiln plant comprising a kiln having a firing end and a back end, wherein fuel is combusted at the firing end and raw meal is fed into the back end for conversion to clinker in the kiln, the controller comprising:a first temperature sensor arranged to measure the temperature at or near the firing end of the kiln and to generate an output indicative of this temperature; gas sensing means arranged to measure the concentration in the kiln of at least one gas from the group comprising O2, NOX, SOX and CO and to generate at least one respective output indicative of the relevant gas concentration; and control means adapted to receive the output from the first temperature sensor and to control the amount of fuel fed to the firing end of the kiln to maintain the temperature at or near the hood of the kiln within a predetermined range, the control means being further adapted to receive said at least one output from the gas sensing means and to control at least a main impeller of the kiln to maintain the concentration of said at least one gas within a predetermined range, thereby to maintain a desired thermodynamic profile in the kiln to control and optimise the properties of clinker produced therein.