A process for firing ceramic shaped bodies and a tunnel kiln used therefor.

摘要

A process for firing ceramic shaped bodies is disclosed, which comprises the step of raising the temperature in the temperature range up to the decomposing temperature of a shaping aid contained in the ceramic shaped body more slowly than in the temperature range from the decomposing temperature to the firing temperature. This reduces the occurrence of cracks or deformations. A tunnel kiln for carrying out this process comprises a preheating zone, a firing zone, a waste heat zone, combustion burners provided at the firing zone exhaust means provided at an inlet side of the preheating zone for evacuating from the kiln combustion gases from the combustion burners and another exhaust means provided at a higher temperature location of preheating zone for evacuating combustion gases from the kiln.