Magnesia brick

Generally, it can be divided into two categories: sintered magnesia bricks (also called fired magnesia bricks) and chemically bonded magnesia bricks (also called unfired magnesia bricks). Magnesia bricks with high purity and high firing temperature are called direct bonded magnesia bricks due to direct contact with periclase grains; bricks made of fused magnesia as raw materials are called fused combined magnesia bricks.

Magnesia bricks have high refractoriness, good resistance to alkali slag, high starting temperature for softening under load, but poor thermal shock resistance. Sintered magnesia bricks are made of magnesia bricks as raw materials. After being crushed, batched, kneaded, and shaped, they are fired at a high temperature of 1550~1600°C. The firing temperature of high-purity products is above 1750°C. Non-cast magnesia bricks are made by adding appropriate chemical binders to magnesia, then mixing, molding, and drying.

Mainly used for steelmaking alkaline open hearth, electric furnace bottom and wall, permanent lining of oxygen converter, non-ferrous metal smelting furnace, high temperature tunnel kiln, calcined magnesia brick and cement rotary kiln lining, furnace bottom and wall of heating furnace, Checker bricks for regenerator of glass kiln, etc.