UNFIRED FIREBRICK CONTAINING GRAPHITE FOR CEMENTKILNS

摘要

There is disclosed unfired firebrick for cement kilns, to be arranged in the inside lining of the low and high transition zones (4) and the sintering zone (5) of the kiln, said firebrick being characterised by the following chemical composition in weight percent: at least 62 wt% of magnesite MgO, between 12% and 20% of alumina AI2O3, between 4% and 11% of graphite, and between 7 - 9% of improving additives in a whole composition, said additives being aluminium powder, silicon metal, silicon carbide and clay; and between 3% and 4% of binding resins.