Obtención industrial de materiales cerámicos a partir de lodos rojos del proceso Bayer

Abstract

The Red Mud is the insoluble residue of the alumina extraction starting from the bauxite for the process Bayer. In Galicia they take place more than 400.000 annual tons of this industrial residue, constituted fundamentally by a mixture of oxides and iron hydroxides, titanium oxides, quartz, and small quantities of clays and other minerals. The present work describes the process of industrial use of the Red Mud, to obtain dense bricks used in heat accumulators, arid for highways and other ceramic products. This type of materials, up to now manufactured in an experimental way in the Institute of Ceramic of Galicia have given place to the creation of a new company and the current construction and setting in operation, of a pilot plant valued in 200.000.000 Ptas. Located in the north of the Province of Lugo, this plant will allow the production of 20 Tm/day of material for its study and commercialisation.