Corundum Bricks
- Corundum Bricks,
- Fused Corundum Bricks,
- Zirconium corundum bricks,
- Chrome corundum bricks.
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Corundum bricks refer to refractory products with an Al2O3 content of more than 90%, also known as alumina refractory bricks. Corundum has a very high hardness, a Mohs hardness level of 9, and a high melting point. These are closely related to the firmness of the Al-O bond in the structure. Therefore, α-Al2O3 is the main phase of high-temperature refractory materials and high-temperature electrical insulation materials.
Corundum has good stability against acid, alkaline slag, metal and glass melt. It can achieve good results when used in an oxidizing atmosphere at high temperatures or in a reducing atmosphere.
Rongsheng Corundum Bricks for Sale
The basic raw material of corundum bricks is fused corundum or sintered corundum. In order to improve certain properties of corundum bricks, some manufacturers often add some mineral raw materials to the corundum material to form a composite material. Such as zirconium corundum bricks, chrome corundum bricks, titanium corundum bricks, etc., to improve the performance of the products.
Recombined Sintered Corundum Bricks
Refractory bricks made of sintered corundum as granular material and corundum fine powder are formed into mud, dried, and fired, which are called recombined sintered corundum bricks. They are also called corundum clinker refractory bricks.
Rebonded Fused Corundum Bricks
Fused corundum clinker is used as the granular material, and fused corundum fine powder or sintered corundum fine powder is used as the matrix to make rebonded fused corundum bricks.
Physical and Chemical Indicators of Corundum Bricks
| Physical and Chemical Indicators of High Purity Sintered Corundum Bricks in Rongsheng | |||
| Items | RS Corundum Brick A | RS Corundum Brick B | |
| SiO2 % | 0.15 | 0.24 | |
| Al2O3 % | 99.51 | 99.30 | |
| Fe2O3 % | 0.11 | 0.08 | |
| R2O % | 0.026 | 0.12 | |
| Apparent Porosity % | 18 | 16.2 | |
| Bulk Density g/cm3 | 3.20 | 3.23 | |
| Compressive Strength MPa | 133.5 | 96 | |
| Flexural Strength MPa | 1250℃ | – | 15 |
| 1450℃ | – | 13 | |
| Load Softening Start Temperature ℃ | ＞1700 | ＞1800 | |
| Re-burning Linear Change Rate (1600℃, 3h) % | 0 ~ +0.1 | – | |
| Thermal Shock Resistance /times, 1100℃, Water Cooling | 23 | 18 | |
| Application | For the petrochemical industry, etc. | ||
| Physical and Chemical Indicators of Fused Corundum Bricks in Rongsheng | |||
| Items | α-Corundum Bricks | α-β Corundum Bricks | β Corundum Bricks |
| Al2O3 % ＞ | 99 | 94 | 94 |
| SiO2 % ＜ | 0.5 | 1.5 | 0.5 |
| Fe2O3 % ＜ | 0.1 | 0.1 | 0.1 |
| Na2O % ＜ | 0.8 | 4.5 | 7 |
| MgO % ＜ | 0.1 | 0.1 | 0.1 |
| CaO % ＜ | 0.5 | 0.5 | 0.5 |
| TiO2 % ＜ | 0.1 | 0.1 | 0.1 |
| Refractoriness ℃ ＞ | 1900 | 1875 | 1875 |
| Apparent Porosity % | 0 ~ 20 | 0 ~ 5 | 5 ~ 15 |
| Bulk Density g/cm3 ＞ | 3.8 | 3.4 | 3.0 |
| Flexural Strength MPa ＞ | 70 | 150 | 20 |
Rongsheng Refractory Brick Manufacturer
Rongsheng is a powerful manufacturer of refractory bricks. The quality of Rongsheng’s corundum bricks and alumina bricks is guaranteed. Factory direct sales, reasonable prices, and fast delivery! Whether you need fused zirconium corundum bricks for glass kilns or chrome corundum bricks, Rongsheng can provide standard and customized sizes of corundum bricks according to the actual needs of your project. If you have high-quality requirements for refractory brick products and need to save procurement costs, please choose Rongsheng. Contact Rongsheng for free samples, solutions, and quotes.
