Sintered High Temperature Tabular Alumina Granules Low Water Absorption
Sintered High Temperature Tabular Alumina 99.5% for High Purity Refractory Bricks
1. Tabular Alumina Introduction
Tabular alumina is aluminum oxide that has been heated to temperatures above 1,650 °C (3,000 °F). Composed of tabletlike crystals, it has high heat capacity and thermal conductivity as well as exceptional strength and volume stability at high temperatures. For these reasons, a major use of tabular alumina is in the production of high-quality refractories, the materials used for lining industrial furnaces. High-alumina refractories are used in the metal and glass industries in boiler installations, in large furnaces and kilns for smelting metals and firing glass, pottery and porcelain, and in the manufacture of building bricks.
2. Tabular Alumina Specifications
| Shape | Chemical compositions | Physical characteristics | |||||
| AL2O3 | Na2O | SiO2 | Fe2O3 | Bulk Density | Apparent Porosity | Water Absorption | |
| ≥% | ≤% | ≤% | ≤% | ≥g/cm3 | % | % | |
| Balls | 99.55 | 0.40 | 0.10 | 0.03 | 3.55 | 5 | 1.5 |
| Grains | 99.46 | 0.40 | 0.10 | 0.03 | 3.55 | 5 | 1.5 |
| Powder | 99.28 | 0.40 | 0.12 | 0.03 | - | - | - |
3. Tabular Alumina General Advantages
Chemical purity
Chemical inertness
High density
Low water absorption
Extreme hardness
High thermal conductivity
Good resistance to thermal and mechanical shock
High heat capacity
High electrical resistivity
Excellent abrasion resistance
4. Tabular Alumina Characteristics
The different processes for WFA and tabular alumina production (fusion vs. sinter) certainly create differences between the aggregate, which also have an impact on the properties and performance of the corundum brick. Tabular alumina is well received and extensively used in the refractories for steelmaking such as slide gate plate, Al2O3-MgOC brick, castables and pre-cast shapes.
5. Tabular Alumina Applications
Tabular Alumina is used in the refractory industry. Application is shaped and unshaped products, like bricks or specially shaped products e.g. sliding gates, porous plugs for steel ladles and shaped products for the glass industry. Furthermore kiln furniture like ceramic wheels are produced for the application in ceramic kilns. Another application of the Tabular balls is the filtering in Aluminium metal production.
6. Tabular Alumina Particle Sizes Available
Standard sizes: ½” - ¼”, ¼” -8, 3-6, 6-10, 6-14, 8-14, 14-28, 28-48, -14, -28, -48, -100, -325 mesh
5-10, 2-5, 3-6, 2-3, 1-3, 1-2, 0.5-1, 0.2-0.6, 0-1, 0-0.5, 0-0.3, 0-0.2, 0-0.045 mm
Other sizes available per customer's requirement.
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