Heating – Processes of heating or heater operation – Treating an article – container – batch or body as a unit
Patent
1981-07-14
1983-05-24
Camby, John J.
Heating
Processes of heating or heater operation
Treating an article, container, batch or body as a unit
432 12, 432 18, 432 19, 432 26, F27D 300, F27D 1300, F27B 322
Patent
active
043848486
ABSTRACT:
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 volume flow rate, measured axially of the chamber and at the point thereof where the chamber temperature is 900.degree. C., is comprised between 4500 and 12,000, and preferably between 6000 and 10,000 cu.m. per sq.m. of transverse cross-section. Preferably the surface rate of travel of the tiles, when tiles are fired, is comprised between 22 and 30 sq.m. of tile per hour and per linear meter of inner perimeter of the chamber, for 4.5 mm. thick tiles, and between 16 and 22 sq.m. per hour and per meter for 10 mm. thick tiles.
REFERENCES:
patent: 2529690 (1950-11-01), Hess
patent: 2795054 (1957-06-01), Bowen
patent: 3108351 (1963-10-01), Hermans
patent: 3227782 (1966-01-01), Gie et al.
patent: 3291465 (1966-12-01), Wilde
patent: 3604695 (1971-09-01), Steeper
patent: 3969069 (1976-07-01), Knaak
patent: 4005979 (1977-02-01), Brock
patent: 4009993 (1977-03-01), Marazzi
patent: 4183885 (1980-01-01), Marazzi
Camby John J.
Marazzi Ceramiche S.p.A.
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