Sintered corundum brick refers to corundum refractory products made of sintered alumina clinker as raw materials. The brick has a high melting point, stable performance at high temperature, good mechanical strength and wear resistance at room temperature and high temperature, and excellent resistance to metal corrosion and redox resistance. The production process of sintered corundum bricks is to crush the sintered corundum to 3mm coarse particles and partly less than 0.074mm fine powder, some are mixed with a small amount of clay and other binding agents for mixing, and formed by a high-pressure friction brick press or oil press. After drying, it is fired in a high temperature. Generally, the sintered corundum brick with higher purity has a firing temperature of 1750-1800°C. If a small amount of clay or additives are added, the firing temperature can be 1600~1700℃.