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White Corundum Bricks Have a Refractoriness of Over 1790℃
White corundum brick is a refractory product containing more than 90% alumina with corundum as the main crystal phase. It has extremely high room temperature compressive strength, which can reach 340MPa, and a high load softening starting temperature, which is greater than 1700℃. In addition, it also has good chemical stability and can effectively resist the erosion of acidic or alkaline slag, metal and glass liquid. The thermal shock stability of this material is related to its organizational structure, and the dense product has good erosion resistance. RS white corundum brick manufacturer can provide high-quality corundum bricks at a low price. Contact Rongsheng for detailed information.
White corundum bricks can be divided into two types: sintered corundum bricks and fused corundum bricks. Sintered corundum bricks can be made of sintered alumina and fused corundum as raw materials or bauxite clinker with a high alumina/silicon oxide ratio and sintered alumina by sintering. The product has excellent properties such as high strength, high stability, corrosion resistance and thermal shock resistance, and is widely used in high temperature and high pressure process equipment. Rongsheng Corundum Bricks Manufacturer can also provide refractory mud suitable for masonry of white corundum bricks. Customize the size and index parameters of white corundum bricks.
The main component of white corundum bricks is alumina (Al2O3), which is famous for its excellent high temperature performance and chemical stability. In the chemical composition of white corundum bricks, the content of alumina is usually very high, generally above 90%, and some can even reach 99%. This high-purity alumina gives white corundum bricks better refractory properties, enabling them to remain stable in high temperature environments up to 1800 degrees Celsius without deformation or damage. It is widely used in high temperature industrial environments due to its excellent high temperature performance and mechanical strength.
Main Characteristics of White Corundum Bricks
High refractoriness
The refractoriness of white corundum bricks is as high as 1790℃ and above, which is suitable for high temperature working environment.
High mechanical strength
White corundum bricks have good compressive strength and wear resistance, and are not easy to break under high temperature and mechanical impact.
Excellent chemical stability
Due to the stability of Al₂O₃, white corundum bricks have strong resistance to corrosion by acidic or alkaline slag at high temperature.
Good thermal shock resistance
Some modified white corundum bricks, such as composite bricks with added mullite or zirconium corundum, have excellent thermal shock resistance and can adapt to rapid changes in temperature.
Low thermal conductivity
White corundum bricks have low thermal conductivity, which can better reduce heat loss and improve the thermal efficiency of industrial kilns.
Contains zircon components, which enhances corrosion resistance and anti-scouring properties, and is mostly used in glass kilns and other fields.
Carbon-containing corundum bricks
Adding carbon or silicon carbide to corundum bricks further improves wear resistance and is mostly used in steelmaking blast furnaces.
Main Application of Corundum Bricks
Iron and steel industry
Lining materials for high-temperature smelting equipment such as converters, electric furnaces, and refining furnaces.
Components such as slide plates, stoppers, and pouring systems for continuous casting.
Nonferrous metal smelting
Linings for smelting furnaces and refining furnaces for nonferrous metals such as aluminum, copper, and nickel.
Glass industry
Regenerator lattice bricks and feed port bricks for glass melting furnaces.
Cement industry
Linings for high-temperature firing zones of cement rotary kilns.
Chemical industry
Linings for high-temperature reactors and cracking furnaces.
Ceramic and refractory industry
Linings for high-temperature kilns, such as ceramic kilns, tunnel kilns, etc.
Energy industry
Linings for high-temperature waste gas treatment equipment and gasifiers.
White corundum bricks are key refractory materials in high-temperature industrial production due to their excellent performance. They can operate stably for a long time under harsh conditions to ensure normal production and efficiency.
The Difference between White Corundum Bricks and Chrome Corundum Bricks
The difference between white corundum bricks and chrome corundum bricks lies mainly in composition, refractoriness, compressive strength, slag erosion resistance and thermal shock resistance. Chrome corundum bricks have stronger high-temperature resistance and corrosion resistance and are suitable for glass kiln linings, molten iron pretreatment devices and other fields. White corundum bricks are suitable for various high-temperature kiln linings, such as cracking and conversion furnaces in the petrochemical and fertilizer industries. When choosing, the service life and stability of the kiln should be improved according to the actual use needs.
The main types of corundum bricks are white corundum bricks, chrome corundum bricks, zirconium corundum bricks, brown corundum bricks, zirconium oxide bricks, etc. It is a high-quality refractory material. What are the differences between white corundum bricks and chrome corundum bricks?
Composition
The main component of white corundum brick is alumina, with a content of more than 90%. It is a refractory product with corundum as the main crystal phase. In addition to alumina as the raw material, chrome corundum brick also adds Cr2O3 raw material, and then is formed by high-pressure molding and high-temperature sintering.
Refractoriness
The refractoriness of white corundum brick can reach about 1600℃. The refractoriness of chrome corundum brick can reach 1790℃, and the refractoriness of chrome corundum brick is better than that of white corundum brick.
Compressive strength
The compressive strength of white corundum brick is generally between 70 and 100Mpa. The compressive strength of chrome corundum brick can reach about 120Mpa. The latter is better than the former.
Resistance to slag erosion
The apparent porosity of white corundum bricks is generally around 20%, while the apparent porosity of chrome corundum bricks is generally around 15%. Therefore, it can be seen that in high-temperature environments, white corundum bricks are more easily corroded by slag, and in actual use, chrome corundum refractory bricks are better than white corundum refractory bricks in terms of chemical corrosion resistance and permeability to gasified slag.
Thermal shock resistance
During the experiment, as the Cr2O3 content in chrome corundum bricks increased, the thermal shock stability decreased accordingly. Chrome corundum bricks with a Cr2O3 content between 12% and 20% have better thermal shock resistance than white corundum bricks. In other cases, the thermal shock resistance of white corundum bricks is better.
Uses
Chrome corundum bricks are used for glass kiln linings, molten iron pretreatment devices, garbage incinerators, gasification furnace linings, etc. White corundum bricks are used for various high-temperature kiln linings, such as cracking and conversion furnaces in the petrochemical and fertilizer industries, and steelmaking furnaces and blast furnaces in the metallurgical industry. Both products have their own advantages, but chrome corundum bricks have stronger high-temperature resistance and corrosion resistance than corundum refractory bricks.
The difference between white corundum bricks and chrome corundum bricks enables them to play different roles in different environments and process requirements. In actual use, we must choose according to actual use needs, so as to improve the overall service life of the kiln and the stability during use.
