PROCESS FOR TREATING ALUMINIUM SLAGS

摘要

A method for treating aluminum slags in the form of dross or aluminum salt slags obtained in the preparation of aluminum, in which the aluminum slag in the melting process is brought with the exception of the surrounding atmosphere onto a cooling conveyor which is arranged in a housing provided with extraction facilities and whose first section adjoining the supply of the aluminum slag is flushed with an inert gas and whose second section serves for further cooling of the aluminum slag with introduction of air, wherein the lengths of the first section and the second section of the cooling conveyor are designed so that in the first section of the aluminum slag is cooled to a temperature at which the aluminum slag can no longer be chemically changed by exposure to atmospheric oxygen and in the second section, the slag is cooled to a temperature at which the cooled aluminum slag can be processed further to recover the aluminum in the aluminum slag after leaving the cooling conveyor.