High Quality Refractory Nitride Bonded Silicon Carbide Brick for Cast Furnace

Nitride bonded silicon carbide brick is a refractory product with magnesium oxide (MgO) and chromium trioxide (Cr2O3) as the main components, and perovskite and spinel as the main mineral components. This type of brick has high refractoriness, high temperature strength, strong resistance to alkaline slag, excellent thermal stability, and certain adaptability to acid slag. The main raw materials for manufacturing silicon nitride bricks are sintered magnesia and chromite. The purity of the magnesia raw material should be as high as possible. The requirements of the chemical composition of chromite are: Cr2O330-45%, CaO not more than 1.0-1.5%. The production process of fired silicon nitride bricks is similar to that of magnesia bricks. In order to eliminate bricks in the firing process due to MgO and Cr2O3, Al2O3 or directly combined with silicon nitride bricks.

Nitride bonded silicon carbide bricks have excellent anti-erosion ability, high temperature strength, good chemical stability, high service temperature and strong wear resistance, it is an ideal refractory material used as a lining of a vulcanized bed boiler.