C - Chemistry – Metallurgy – 04 – B
Patent
C - Chemistry, Metallurgy
04
B
C04B 7/32 (2006.01) C04B 7/38 (2006.01) C04B 7/43 (2006.01) C04B 7/44 (2006.01) F27B 1/00 (2006.01) F27B 9/02 (2006.01) F27B 9/12 (2006.01) F27B 9/26 (2006.01) F27B 9/36 (2006.01)
Patent
CA 2717917
The invention relates to a method for manufacturing a sulfoaluminous or belitic sulfoaluminous clinker from a raw mix formed from a mixture including minerals containing calcium, aluminum, silica, iron, and sulfur, preferably in sulfate form, and is characterized in that the method comprises the steps including: at least partially dehydrating and decarbonating the mixture through placement in a vertical kiln (1) comprising a substantially vertical chamber (2) wherein the mixture is heated, the chamber (2) of the vertical kiln (1) being supplied with hot gases the temperature of which is between 900 and 1150° C; extracting the dehydrated and decarbonated mixture from the vertical kiln (1) and conveying the same in a continuous kiln (4) comprising a furnace (5) and a transporting means (6) for transporting the mixture across the furnace (5); heating the mixture from the vertical kiln (1) by passing the mixture through the furnace (5) via the transporting means (6) such that a clinkerization of the mixture is obtained, the average passage time in the furnace being greater than 15 minutes.
L'invention concerne un procédé de fabrication d'un clinker sulfo- alumineux ou sulfo-alumineux-bélitiques à partir d'un cru constitué par un mélange comprenant des minéraux contenant du calcium, aluminium, silice, fer et soufre, préférentiellement sous forme sulfate, caractérisé en ce qu'il comporte les étapes consistant à: déshydrater et décarbonater, au moins en partie, le mélange par passage dans un four droit (1) comportant une cuve (2) sensiblement verticale à l'intérieur de laquelle le mélange est chauffé, la cuve (2) du four droit (1) étant alimentée en gaz chauds, dont la température est comprise entre 900 et 1150 °C; extraire le mélange déshydraté et décarbonaté du four droit (1) et l'amener dans un four à passage (4) comportant un foyer (5) ainsi que des moyens de transport (6) du mélange au travers du foyer (5); chauffer le mélange issu du four droit (1), par passage dans le foyer (5), par l'intermédiaire des moyens de transport (6), de manière à obtenir une clinkérisation du mélange, le temps de passage moyen du mélange dans le foyer étant supérieur à 15 minutes.
Beauvent Guy
Croce Jacques
de La Fouchardiere Rene
Jacob Yvan-Pierre
Renie Dominique
Ogilvy Renault Llp/s.e.n.c.r.l.,s.r.l.
Vicat
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