Heat treatment process, in particular of essentially flat ceramic products, and furnace therefor

摘要

The invention relates to a method and a continuous furnace for the heat treatment of essentially flat bodies made of ceramic material. In the continuous furnace with a roller table (5), a firing zone (3) which can be partitioned off from the heating zone (1) and the cooling zone (2) by partition walls (6, 7) is arranged between a heating zone (1) and a cooling zone (2) which heats the body to be burned very quickly to the firing temperature, moving it back and forth for the purpose of avoiding deformation. During the firing, the transport of the bodies in the cooling zone (2) is continued, while the transport in the heating zone (1) is interrupted by completely stopping the movement of the bodies or by moving the bodies back and forth. During the partitioning of the firing zone (3), the gases heated in the cooling zone (2) are passed through a bypass (12) into the heating zone (11) in order to participate in the heating of the body. During the emptying of the firing zone and loading of the firing zone (3) with bodies to be fired, the roller table (5) is immediately in front of and behind the firing zone (3) in a section F1-F2, F5-F6 corresponding to the length of the firing zone (3). and the section F3-F4 of the firing zone itself is driven at an increased transport speed in order to keep the downtime for the firing as short as possible.