METHOD AND DEVICE FOR ACCELERATED BURNING OF POROUS CERAMIC MOULDED PARTS

摘要

The invention relates to a method and to a device for the accelerated burning of porous ceramic moulded parts having an open-pore passage structure with a reduced diameter. The aim of the invention is to substantially improve the burning process of ceramic moulded parts by increasing the heating speed thus preventing the formation of cracks and to significantly reduce the burning time for the inner heat transfer surfaces of moulded parts. Said aim is achieved by virtue of the fact that in moulded parts, heat is initially transferred from the inside in the outside of the moulded part at a temperature (T1), which is characteristic to the convective heat transfer, by separating the entire hot gas flow (Vg) into a plurality of partial flows (A111An). Said partial flows (A1^An) are introduced into the inner flow path (19) of the moulded part and a uniform flowing through of said flow path produces an approximately constant flow and prevents a turbulent flow in the flow path, heat is then transferred from the inside to the outside and is maintained until the temperature (T2) is reached by the thermal radiation of the hot gases which exceeds the temperature (TI) reached by the convective transfer of heat, and additional heat is introduced in the form of thermal radiation from the outside to the inside, and from the inside to the outside of the moulded parts by maintaining the flow and a simultaneous impingement of the moulded part with the partial flows (A1111An-I) along the inner flow path (19) and an additional partial flow (B) which is separated from the hot gas flow is produced along an outer flow path (S) at a temperature (T2) which is characteristic for thermal radiation.