REFRACTORY HARD METAL CONTAINING TILES FOR ALUMINUM CELL CATHODES

摘要

61293-135 REFRACTORY HARD METAL CONTAINING TILES FOR ALUMINUM CELL CATHODES This invention relates to electrolytic reduction cells for aluminum production wherein tiles have been placed upon the cathode surfaces to improve the cell operation. These tiles have aluminumwettable surfaces, which reduce electrical losses and increase cathode life. The tiles are produced from a mixture of refractory hard metal (RHM), a thermosetting resin, carbonaceous fillers and carbonaceous additives. The tiles are physically formed, polymerized and/or cross linked, and carbonized so that they can be inserted into a cell. The tile may have the RHM homogeneously dispersed throughout the tile structure, or it may have the RHM concentrated in layered form.