Fused Cast Block Magnesia Chrome Brick Manufacturer

Al2O3≥/%: 50-80

Density (g/cm³) ≥: 2.15 - 2.65

Cold fracture modulus ≥: MPa 4 - 7

Cold pressing strength ≥: MPa 25 - 40

Refractive index ≥: °C 1700 - 1780

The advantages of high-aluminum refractory casting materials Resistant to high temperatures

The high-aluminum casting material contains a large amount of alumina and has a relatively high melting point, usually ranging from 1000℃ to 1700℃. It can remain stable in extremely high temperatures and is suitable for high-temperature industries such as steelmaking and cement production. 

Impact resistance

The binder used for high-aluminum castables can provide strength and cohesion to the castables. Impact resistance means that it can withstand mechanical impacts and high stresses without cracking. 

Low volume density and porosity

The water consumption of high-alumina refractory castable is half that of ordinary castable, thereby improving the compactness of the castable and reducing the porosity. The low porosity can prevent the penetration of slag and corrosive gases, minimize the heat loss of the material, and thus enhance energy efficiency. 

Excellent wear resistance

The wear resistance of the casting material can withstand the wear caused by solid particles or liquids, thereby extending the service life of the furnace lining and reducing maintenance costs. 

Outstanding chemical resistance

High-alumina refractory mortars have strong resistance to acids, bases and other corrosive substances. They can withstand chemical reactions that may cause erosion, degradation or structural damage to the refractory lining. High-alumina refractory mortars can resist these corrosive environments. 

Application of high-alumina refractory castables

Petroleum industry

High-alumina refractory castables can be used in cracking furnaces, sulfur recovery units, etc. in the petroleum industry. These refractory castables can provide insulation, corrosion resistance and high-temperature stability for conversion furnace tubes and combustion zones. 

Cement Industry

High-alumina refractory materials are typically used as the inner lining of cement kilns, preheaters, and cyclone drums to provide high-temperature protection. They can also be used to construct the inner lining of cement rotary kilns, reducing maintenance costs and improving production efficiency. 

Steel Industry

The casting materials are commonly used in the steel industry for items such as steel ladles and steel ladle covers to withstand the extreme temperatures and corrosive slag encountered during steel casting. The use of high-aluminum refractory casting materials in the steel industry ensures effective insulation, prolongs equipment lifespan, and enhances overall productivity. 

Heat treatment industry

High-alumina refractory castables can be used in heat treatment furnaces, annealing furnaces, tempering furnaces, quenching tanks, etc. Using high-alumina refractory castables in the heat treatment industry enables precise temperature control within the furnace and uniform heat distribution, extends the lifespan of equipment, and helps improve productivity and product quality.