Classification of refractory materials
2024-08-26 10:54:19
Refractory materials are usually classified according to their chemical composition, refractoriness, shape and manufacturing process. The following are the main classification methods:
1. Classification by chemical composition:
Acidic refractories: The main component is silicon dioxide (SiO?), such as silica bricks, clay bricks, etc. This type of material is suitable for acidic environments, but not suitable for contact with alkaline substances.
Alkaline refractories: The main component is magnesium oxide (MgO) or calcium oxide (CaO), such as magnesia bricks, dolomite bricks, etc. This type of material is suitable for alkaline environments.
Neutral refractories: The main component is bauxite (Al?O?) or silicon carbide (SiC), such as high alumina bricks, silicon carbide bricks, etc. This type of material is suitable for acidic and alkaline environments.
2. Classification by refractoriness:
Ordinary refractories: The refractoriness is between 1580°C and 1770°C, such as ordinary clay bricks.
Advanced refractory materials: Refractory degree is between 1770°C and 2000°C, such as high alumina bricks, silica bricks, etc.
Special grade refractory materials: Refractory degree is above 2000°C, such as zirconium corundum bricks, silicon carbide bricks, etc.
3. Classification by shape and structure:
Shaped refractory materials: Refractory materials with standard shapes, such as bricks, blocks, etc.
Amorphous refractory materials: Refractory materials without fixed shapes, such as castables, ramming materials, refractory coatings, etc.
4. Classification by manufacturing process:
Fired products: Refractory materials made by high temperature firing, such as sintered bricks, ceramic fibers, etc.
Unfired products: Refractory materials that do not need to be fired, such as chemically bonded refractory bricks, low cement castables, etc.
Cast products: Casting after melting the raw materials, such as cast alumina bricks.
5. Other special classifications:
Insulating refractory materials: materials with low thermal conductivity, such as diatomite bricks, lightweight clay bricks, etc., are mainly used for thermal insulation.
Anti-slag refractory materials: materials with strong resistance to slag erosion, such as magnesia-chrome bricks, etc.
These classification methods can be selected according to actual application needs in order to find the most suitable refractory materials.
1. Classification by chemical composition:
Acidic refractories: The main component is silicon dioxide (SiO?), such as silica bricks, clay bricks, etc. This type of material is suitable for acidic environments, but not suitable for contact with alkaline substances.
Alkaline refractories: The main component is magnesium oxide (MgO) or calcium oxide (CaO), such as magnesia bricks, dolomite bricks, etc. This type of material is suitable for alkaline environments.
Neutral refractories: The main component is bauxite (Al?O?) or silicon carbide (SiC), such as high alumina bricks, silicon carbide bricks, etc. This type of material is suitable for acidic and alkaline environments.
2. Classification by refractoriness:
Ordinary refractories: The refractoriness is between 1580°C and 1770°C, such as ordinary clay bricks.
Advanced refractory materials: Refractory degree is between 1770°C and 2000°C, such as high alumina bricks, silica bricks, etc.
Special grade refractory materials: Refractory degree is above 2000°C, such as zirconium corundum bricks, silicon carbide bricks, etc.
3. Classification by shape and structure:
Shaped refractory materials: Refractory materials with standard shapes, such as bricks, blocks, etc.
Amorphous refractory materials: Refractory materials without fixed shapes, such as castables, ramming materials, refractory coatings, etc.
4. Classification by manufacturing process:
Fired products: Refractory materials made by high temperature firing, such as sintered bricks, ceramic fibers, etc.
Unfired products: Refractory materials that do not need to be fired, such as chemically bonded refractory bricks, low cement castables, etc.
Cast products: Casting after melting the raw materials, such as cast alumina bricks.
5. Other special classifications:
Insulating refractory materials: materials with low thermal conductivity, such as diatomite bricks, lightweight clay bricks, etc., are mainly used for thermal insulation.
Anti-slag refractory materials: materials with strong resistance to slag erosion, such as magnesia-chrome bricks, etc.
These classification methods can be selected according to actual application needs in order to find the most suitable refractory materials.