The raw material used for chrome corundum brick is a solid solution which is synthesized by a certain ratio of alumina and chrome oxide and melted at a high temperature. The use of special refractory production process to make refractory bricks can improve and improve the intrinsic quality of the products and improve the high temperature performance of the products. The physical and chemical properties of high performance chrome corundum bricks (AK, AKZ) are compared with those of similar foreign products and corundum bricks.
It can be seen that China's chrome corundum bricks have excellent performance and can reach the level of quality of similar foreign products, and can replace imported refractory materials in use.
application
Used in the steel industry, the chrome corundum material has more than doubled the service life of corundum materials, such as ladle ventilated bricks; in the non-ferrous smelting industry, the wear resistance and corrosion resistance of chrome corundum bricks are significantly better than other bricks; In the carbon black industry, the use of chrome corundum bricks in Guangdong Maoming Carbon Black Plant is twice as long as that of corundum bricks used under the same conditions. The AK-type chrome corundum brick is used in the carbon black reaction furnace of the Jixian Carbon Black Plant, and its service life has exceeded that of corundum brick.
In the petrochemical industry, large and medium-sized fertilizer plants are characterized by long-term high temperature (1350-1450), high pressure (3.1~8.53MPa), strong reducing atmosphere (CO+H2+CH4) and high gas flow rate (about 10m· S-1 has more serious erosion and damage to the lining refractory material, so the lining refractory material is more demanded. The high-performance chrome corundum brick has high density and high strength, and is more resistant to airflow scouring and wear resistance than corundum brick. The introduction of Cr2O3 into the brick changes the inherent quality of the product, which significantly improves the erosion resistance and permeability resistance of the brick. The use of chrome corundum brick on the gasifier can improve the service life of the gasifier.
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