Wholesalers Refractory Magnesia Calcium Brick Magnesite Dolomite Brick for Steel Refiningfurnace

Magnesia dolomite brick is also called high calcium magnesium brick. Magnesia refractories with cristobalite as the main crystalline phase and tricalcium silicate as the secondary crystalline phase.It is used in the air eye of the steel-making side-blown converter, open hearth furnace top, oxygen-blown converter upper and other places.
Magnesia dolomite brick is a magnesia compound refractory material with MgO and CaO as the main chemical components. Its main mineral composition is cristobalite and cristobalite, both of which are high-melting minerals, which do not react at high temperature to generate new The compound minerals exist in an independent form and maintain their own inherent characteristics.
Cristobalite has good high temperature plasticity, which can buffer the thermal stress generated inside the brick due to temperature changes; cristobalite reacts with SiO2 in the slag to generate high melting point minerals C2S and C3S, which improves the viscosity of the slag and reduces it. The penetration of the slag into the brick improves the anti-stripping performance of the brick; calcite can absorb non-metallic inclusions such as S, P and AI2O3 in molten steel.Therefore, the magnesia dolomite brick has good thermal shock stability, good structural spalling resistance and slag penetration resistance, and also has the unique performance of purifying molten steel.