Calcined kaolin is a kind of kaolin product after high temperature treatment. Because of its unique physical and chemical properties, it has been widely used in many industrial fields. The following are the main application fields of calcined kaolin:

I. Refractory materials

Calcined kaolin is an important raw material for manufacturing refractories, which is widely used in industries such as steel, cement, ceramics, glass and construction. Its main uses include:

Refractory bricks: Calcined kaolin can be used to produce high-alumina refractory bricks, clay bricks, insulating brick, etc., with high refractoriness and good corrosion resistance.

Refractory castable: used to repair and build the lining of high-temperature furnaces, with good fluidity and construction performance.

Refractory fiber: It is used to make heat insulation materials such as aluminum silicate fiber felt and fiberboard, and has excellent heat insulation performance.

II. Paper industry

Calcined kaolin is mainly used to improve the whiteness, smoothness and printing adaptability of paper in papermaking field. Its specific applications include:

Filler and coating pigment: calcined kaolin can be used as paper filler and coating pigment to increase the opacity and elasticity of paper and improve ink adsorption.

High-grade paper production: used to produce high-grade coated paper, etc., with the advantages of low cost, high whiteness and strong hiding ability.

III. Coatings industry

Calcined kaolin can be used as filler and pigment substitute in coatings, which has the following advantages:

Reduce viscosity: it can slow down the settling speed of coatings and improve leveling and adhesion performance.

Improve storage stability: improve the anti-floating color and blooming of coatings.

IV. Plastics and rubber industries

Calcined kaolin has many applications in plastic and rubber products:

Reinforcing material: plays a reinforcing role in rubber products and improves the mechanical properties of products.

Functional filler: improve infrared light blocking ability, heat preservation and scattering light transmittance in plastic film.

V. Agriculture and chemical industry

Calcined kaolin is also widely used in agriculture and chemical industry:

Agricultural plastic film: improve the thermal insulation of greenhouse film and promote the early germination and maturity of crops.

Pesticides and fertilizers: Calcined kaolin has good adsorption and can be used to prepare pesticide carriers and silicon fertilizers.

VI. Other applications

Calcined kaolin can also be used for:

Casting: As casting sand and acid-resistant brick, it is used for molding in foundry.

Aerospace: used to manufacture special ceramic materials such as high-temperature combustion chambers and nozzles.

To sum up, calcined kaolin plays an irreplaceable role in many industrial fields such as refractories, paper making, coatings, plastics, rubber and so on because of its excellent fire resistance, chemical stability and physical properties.