EP 0248708 B1 19900117 - PROCESS FOR CONTROLLING A PLANT FOR PRODUCING CEMENT BY THE DRY WAY WITH PRECALCINATION
Title (en)
PROCESS FOR CONTROLLING A PLANT FOR PRODUCING CEMENT BY THE DRY WAY WITH PRECALCINATION
Publication
Application
Priority
FR 8608032 A 19860604
Abstract (en)
[origin: US4817008A] To enable the operation of a cement manufacturing installation to be controlled by taking into account changes in essential operating parameters as soon as they appear, the quantity of the total theoretical heat (QT) required to convert the raw material to clinker is calculated by applying correcting coefficients to the quantity of a predetermined total nominal heat (QTO) corresponding to nominal values imposed by parameters (K1, K2, . . . Kn) characteristic of the raw material, of the fuel, of the clinker and of the operation of the installation, the correcting coefficients taking into account differences between the nominal values and measured values of said parameters. The quantity of the theoretical heat (QF) to be supplied to the kiln is calculated by deducting the quantity of heat (QP) supplied to the precalcination chamber from the quantity of total theoretical heat (QT). A consigned value (FF1) of flow of the fuel supplied to the kiln is calculated on the basis of the quantity of the theoretical heat (QF) to be supplied to the kiln, and the actual consigned value (FFO) of the flow control is progressively modified until it has reached the calculated consigned value (FF1) of fuel flow, the progress of variations imposed on the consigned value depending on the conditions of thermal treatment of the raw material and of its dwell time in the kiln. These steps are periodically repeated at relatively close intervals of time.
IPC 1-7
IPC 8 full level
C04B 7/44 (2006.01); F27B 7/20 (2006.01); F27B 7/42 (2006.01)
CPC (source: EP US)
F27B 7/42 (2013.01 - EP US)
Designated contracting state (EPC)
AT BE CH DE ES GB GR IT LI LU NL SE
DOCDB simple family (publication)
EP 0248708 A1 19871209; EP 0248708 B1 19900117; AT E49653 T1 19900215; BR 8702812 A 19880301; CA 1334296 C 19950207; DE 3761462 D1 19900222; DK 165651 B 19921228; DK 165651 C 19930601; DK 291887 A 19871205; DK 291887 D0 19870604; ES 2012400 B3 19900316; FR 2599826 A1 19871211; FR 2599826 B1 19890825; JP S6340748 A 19880222; PT 85010 A 19870701; PT 85010 B 19900731; US 4817008 A 19890328
DOCDB simple family (application)
EP 87401168 A 19870525; AT 87401168 T 19870525; BR 8702812 A 19870602; CA 538746 A 19870603; DE 3761462 T 19870525; DK 291887 A 19870604; ES 87401168 T 19870525; FR 8608032 A 19860604; JP 13834587 A 19870603; PT 8501087 A 19870604; US 5717187 A 19870602