Hello, welcome to the official website of Liaoning Hongyu Refractories Group Co., Ltd.
Liaoning Hongyu refractory Group Co., Ltd.
Address: two room village, Guan Tun Town, Dashiqiao, Liaoning, China
Web site: www.hy-ref.com
Contact: high general
Zip code: 115100
Alumina magnesia carbon bricks are refractory products made of extra high bauxite or corundum sand, magnesia and flake graphite. Alumina magnesia carbon bricks are made of super high bauxite or corundum sand, magnesia and flake graphite as main raw materials. It is characterized by the advantages of high corrosion resistance and uneasy exfoliation at high temperature. It also has the advantages of high residual expansion rate because of the heat generation of spinel in use, so it has become a newly developed high quality lining brick.
In addition to the advantages of high corrosion resistance and uneasy exfoliation at high temperature, the alumina magnesia carbon brick also has the advantages of high residual expansion rate due to the heat generation of spinel in use, so it has become a newly developed high quality lining brick. It contains Al2O3 60% ~ 69%, MgO 7% ~ 14% and C 5% ~ 12%. It has good slag corrosion resistance and thermal shock resistance, and has a slight reburning expansion.
The alumina magnesia carbon brick has the advantages of corrosion resistance, anti stripping, balanced erosion, safe use, less slag and easy removal. It is mainly used for the use of harsh steel lining. In the continuous casting of large tundish and ladle, the lining and the bottom of the ladle are lined with alumina magnesia carbon bricks.
In order to improve its antioxidant properties, the additives such as Si powder, Al powder, SiC powder or silicon iron powder are properly added to the ingredients. The resin is used as binder and high pressure molding. It can be used after treatment at 200~300 degrees C, without calcining. It is mainly used for large converter and ultra high power electric furnace ladle lining and refining furnace lining.
High alumina bauxite is used as raw material, because it contains a certain proportion of SiO2 and other impurities, and the structure is not dense and the slag erosion resistance is poor. In order to improve its slag resistance, electric melting or sintered corundum can be used instead of some special high alumina bauxite. In order to improve the oxidation resistance and high temperature strength of the products, the measures of adding a small amount of metal powder have been adopted, but the thermal shock resistance of the products is reduced, and the content of the flake graphite is increased.