PROCESS FOR THE CHEMICAL BONDING OF HEAVY METALS FROM SLUDGE IN THE SILICATE STRUCTURE OF CLAYS AND SHALES AND THE MANUFACTURE OF BUILDING AND CONSTRUCTION MATERIALS THEREWITH

摘要

The present invention relates to a process for removing contaminants, particularly heavy metal cations from industrial sludge and other industrial materials. The process comprises mixing the industrial wastes with specific fine clay or shale particles to form pellets which are heated at high temperature to form a nonhazardous sintered product. The product is then utilized in the manufacture of bricks, cinder blocks and other building materials and surfaces.