Understanding High Alumina Aggregate For Refractory Applications

High Alumina Aggregate

High Alumina Aggregate is a high-grade bauxite aggregate in which the amount of alumina is 55 to 88. It is an indispensable material in making refractory castable. Mixed with high alumina cement, powder according to a certain proportion, high alumina aggregates can be made into refractory concrete with high strength 1.

As the raw material of refractory, High Alumina Aggregate is made through a series of manufacturing processes. With the high amount of Al2O3, it possesses many sound performances such as high temperature and strong strength. High alumina aggregate is widely used in refractory material, refractory concrete and casting field 1.

 

High alumina aggregate (HAA) is a type of refractory aggregate that is made from bauxite ore that has been calcined to a high alumina content. The alumina content of HAA is typically between 50% and 80%, which gives it excellent resistance to heat, corrosion, and abrasion.

 

The high alumina content of HAA gives it a number of desirable properties, including:

 

High melting point: The melting point of HAA is typically around 2,000°C, which makes it very resistant to melting and thermal shock.

 

Good thermal conductivity: HAA is a good conductor of heat, which makes it ideal for use in applications where heat needs to be transferred quickly.

High compressive strength: HAA has a very high compressive strength, which makes it ideal for use in applications where high loads are present.

Abrasion resistance: HAA is very resistant to abrasion, which makes it ideal for use in applications where there is a lot of wear and tear.

Applications of High Alumina Aggregate

 

Refractory linings: HAA is used to line furnaces, kilns, and other high-temperature equipment. Castable refractories: HAA is used to make castable refractories, which are used to line furnaces and kilns. Abrasive products: HAA is used to make abrasive products, such as grinding wheels and sandblasting media. Ceramics: HAA is used to make ceramics, such as spark plugs and insulators.

 

The high alumina content of HAA gives it a number of advantages over other types of aggregate, including:

 

High melting point: HAA has a very high melting point, which makes it very resistant to melting and thermal shock. Good thermal conductivity: HAA is a good conductor of heat, which makes it ideal for use in applications where heat needs to be transferred quickly.

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