Process and apparatus for firing ceramic materials

Details Process and apparatus for firing ceramic materials Process and apparatus for firing ceramic materials

C - Chemistry, Metallurgy

04

B

25/105

C04B 33/32 (2006.01)

Patent

CA 1120698

ABSTRACT OF THE DISCLOSURE A process for firing ceramic bodies, in particular tiles, is disclosed, consisting in conveying the ceramic bodies through an elongated heat treatment chamber, both main faces thereof being freely exposed to heat transmission, simultaneously heating said bodies and the chamber walls by means of a heating fluid, generally combustion gases, the temperature of the portions of the chamber walls which are in view of the ceramic bodies not being higher than that of the heating fluid, and controlling the flow of the heating fluid so that its actual space velocity, measured axially of the chamber and at the point thereof where the chamber temperature is 900°C, is comprised between 4500 and 12000, and preferably between 6000 and 10000 cu.m. per sq.m. of transverse cross-section. Preferably the surface space velo- city of the tiles, when tiles are fired, is comprised between 22 and 30 sq. m. of tile per hour and per linear metre of inner perimeter of the chamber, for 4.5 mm. thick tiles, and between 16 and 22 sq.m. per hour and per metre for 10 mm. thick tiles.

330182

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