wanhaorefractory

The main factors affect the performance of  magnesia carbon bricks  include MgO / CaO ratio, chemical purity and density etc. The MgO / CaO ratio of  magnesia carbon bricks  can increase high temperature resistance, chemical erosion resistance of slag,high temperature corrosion resistance and hydration resistance. But it will decrease the magnesia carbon brick’s spalling resistance, resistance to the slag penetration and molten steel purification performance. Adding some additives in the production of  magnesia carbon bricks  can improve some performances of the  magnesia carbon bricks . Add appropriate amount of ZrO2 can improve the performance of spalling resistance,  high temperature corrosion resistance and hydration resistance of the  magnesia carbon brick . ZrO2 is called the "multi-functional" additives of  magnesia carbon brick . At Abroad, eye bricks of AOD furnace generally use high-purity, high density si...

The magnesia-calcium brick, also known as high calcium magnesite brick, is a kind of magnesial refractory material with periclase as principal crystalline phase and tricalcium silicate as secondary phase. It contains 80 % ~ 87% MgO, 6 % ~ 9% CaO, CaO/SiO2 ratio is between 2.2 ~ 3.0. Its significant structural feature is periclase directly contact with dicalcium silicate and tricalcium silicate, making eutectic solution-4 Cao·Al2O3·Fe2O3 fill into crystal gap between dicalcium silicate and tricalcium silicate. Its porosity is low, the refractoriness under load is higher than 1700 ℃. It has good alkaline slag resistance ability, but with poor thermal shock resistance. Made by calcium magnesia sand as refractory raw material , it will be made by firing at 1550~1600 ℃ after crushing, burdening, mixing and molding. It will be used at eye place of side-blown converter, top place of open-hearth furnace and oxygen-blown converter etc. Magnesia-calcium brick has seven pr...