Abstract: The invention relates to a process for the utilization of waste substances containing combustible components and showing fluctuations in their composition and properties and to a device for carrying out the process.The improvement comprises effecting the volatilization, decomposition and incomplete combustion of the waste substances in a first process step which is immediately followed by a second process step in which formed pyrolysis gases are burned in a heating device for burning starting materials for building materials or inorganic binders.

Abstract: The present invention provides a method for producing a mixture of materials of differing compositions, particularly a mixture comprised of two burned, sintered, calcined, and/or heated inorganic components, the first of said components being subjected to a heating process, particularly a burning process, and the second and other components being heated to a temperature below the temperature to which the first component has been heated.