High alumina brick

High alumina refractory bricks/high alumina bricks are made by batching, mixing, forming, and finally high-temperature roasting of high alumina alumina clay, silicate stone, natural or artificial corundum, industrial alumina, and other materials. Its characteristics are that its fire resistance and load softening temperature are higher than those of clay refractory bricks, and the operating temperature can reach 1400-1500 ℃; It is a neutral refractory material with good slag resistance and thermal shock stability. Its disadvantages are low thermal stability, large rewinding shrinkage, and high price.

The ω (AL2O3) of high alumina refractory brick/high alumina brick is 48%~75%. If the Al2O3 content of high alumina brick is higher than 90%, it is called corundum brick. According to the high or low alumina content, it can be classified into various grades. According to the Al2O3 content in high alumina bricks, they are usually divided into three grades: Grade I - Al2O3 content>75%; Grade II - Al2O3 content of 60-75%; Grade III - Al2O3 content is 48-60%.

High alumina refractory bricks/high alumina bricks are mainly used for lining blast furnaces, hot blast stoves, electric furnace tops, blast furnaces, reverberatory furnaces, and rotary kilns. In addition, high alumina bricks are widely used as regenerative grid bricks for open hearth furnaces, plugs for pouring systems, and spout bricks. But the price of high alumina bricks is higher than that of clay bricks, so there is no need to use high alumina bricks where clay bricks can meet the requirements.