Fused Cast Block Magnesia Chrome Brick Manufacturer

Volume density (g/cm³): ≥ 3.25;

Apparent porosity: ≤ 15%;

Pressure strength (MPa) ≥ 1800;

Load softening temperature (0.2 MPa, T0.6°C): ≥ 168;

Core advantages

The performance advantages of chromite bricks mainly stem from the continuous solid solution formed by chromium oxide (Cr₂O₃) and aluminum oxide (Al₂O₃), which bring about:

Unparalleled resistance to erosion: especially in alkaline environments. It has extremely strong resistance to erosion by alkaline vapors (Na₂O, K₂O), alkaline slag, and metal melts (such as aluminum, lead, tin, etc.). This is its most prominent advantage.

Extremely high high-temperature structural strength: The chromite matrix itself is highly strong, and the solid solution strengthening effect of chromium oxide makes its high-temperature strength (creep-softening temperature) extremely high, approaching or exceeding 1700°C, and it is not prone to deformation at high temperatures.

Excellent wear resistance: The structure is dense and the hardness is high, which can effectively resist the erosion of high-temperature gas flow and the wear of materials.

Good thermal chemical stability: It does not react with reducing atmospheres such as CO and H₂, and can remain stable in both oxidative and reducing atmospheres.

Lower thermal conductivity: Compared with electrically fused AZS bricks, its thermal conductivity is lower, which helps to improve the insulation and energy efficiency of the kiln.

Core application

Due to its characteristic of being "the king against alkali erosion", chromite bricks are mainly used in situations where AZS bricks cannot handle, such as highly corrosive alkaline or special environments.

Carbon black reaction furnace: This is its most classic and primary application field. The furnace lining, throat, reaction zone, etc., are used to resist the intense scouring and alkali erosion from high-temperature and high-speed hydrocarbon raw materials and air.

Gasification furnace and syngas reaction furnace: The high-temperature, high-pressure, strong reducing environment inside the furnace is very suitable for using chromite bricks.

Metallurgical industry of non-ferrous metals:

Aluminum industry: Refining furnaces, troughs, vacuum degassing devices lining, resistant to aluminum liquid erosion.

Copper, lead, tin smelting: Certain specific areas of certain furnaces.

Special parts of the glass industry:

The upper grid body of the glass kiln furnace, used to resist the erosion of high-concentration alkaline vapor (R₂O). This is its main application point in the glass industry.

The chest wall and crown of the oxygen-fuel combustion glass kiln furnace, due to the absence of alkali vapor volatilization problem and the need for high corrosion resistance.