Process and device suitable for thermally processing a material comprising thermally degradable and thermally-resistant substances

摘要

The invention relates to a process suitable for thermally processing a material containing substances that can be degraded or altered by heat and substances that are heat resistant. The process involves predrying the material in a drying zone and a preheating zone and baking the material in a baking zone. The material is predried in the preheating zone in the presence of a minimal quantity of oxygen and in the baking zone in the presence of an increased quantity of oxygen. An indirect supply of hot gas is used for the baking step. A device for carrying out the process is also provided.