Original: China

Material Type: Others

Main Color:

Surface Finish:

Reference Price: US$ 750 / Ton

Shipping Port: Tianjian

Minimum Order: 1 Ton

Packings: 1MT/BIG BAG

Payment Methods: T/T, L/C

Packing Details: 1MT/BIG BAG

Stock Status:

Delivery Period: 2000Tons

Deion:

Tabular Alumina is high-density, fully shrunk, coarse crystalline alpha alumina that has been converted to the corundum form. It is a completely crystallized α-alumina sintered at slightly below the melting point of imported alumina after batching, grinding and molding.
Tabular Alumina is produced by sintering ball-formed alumina at a temperature under the 2040°C fusion point of aluminum oxide. The crystals are arranged in a tabular staggered way, which increases the mechanical strength of the particles.
Tabular alumina has characteristic large, well developed hexagonal tablet shaped α-alumina crystals of up to 200μm length.
Properties:
1. Complete crystallization, High purity up to 99.5 Al2O3
2. Low apparent porosity Less than 5
3. Good resistance to alkalis and mineral acids
4. Low water absorption less than 1
5. High hardness and toughness
6. High thermal conductivity
7. Excellent thermal shock resistance
8. Good abrasion resistance.
9. High volume stability
10. High anti-bending strength
Technical data:
Typical physical properties
Specific gravity 3.96 g/cm3
Bulk density 3.45-3.5g/cm3
Apparent porosity 2-5
water absorption rate 0.7-1.5
Mohs' Hardness 9.0
Knoop hardness 2000kg/cm3
Thermal conductivity (100℃)0.069 cal/sec cm℃
Heat capacity (20℃)0.21cal/gm/(100℃)
Melting temperature 2050℃
Max. service temperature min 1800℃
Refractive Index 1.76
Appearance White granules or powder
Chemical composition（）
Index AL2O3 SiO2 Fe2O3 Na2O
Guarantee Value min 99.2 max 0.18 max 0.1 max 0.4
Typical Value 99.45 0.05 0.02 0.32
Key Physical Index
Index Bulk density(g/cm3) Porosity() Water absorption rate()
Guarantee Value min 3.5 max 5.0 max 1.5
Typical Value 3.56 2.35 0.72

Particle Size Distribution
Size:mm Distribution Typical Values MAX/MIN
5-10mm 5-10mm 92 75
7-10mm 58 40
5-7mm 35 20
3-6mm 3-6mm 98 90
4-6mm 55 40
3-4mm 44 20
1-3mm 1-3mm 99 90
2-3mm 52 30
1-2mm 47 30
1-2mm +2.36mm 8 10
-1mm 5 10
0.5-1mm 0.5-1.18mm 95 90
0.7-1.18mm 45 35
0.5-0.7mm 50 20
0.2-0.6mm +0.6mm 5 10
-0.2mm 4 10
0-0.5mm 0-0.5mm 95 90
0.15-0.5mm 49 38
-200# +0.088mm 0.3 3
-0.044mm 96 90
-325# -0.044mm 97 85

Available Sizes
Fraction 0-30mm,30-10mm,12-6mm,10-8mm,8-5mm,5-3mm,3-1mm,2-1mm,1-0mm,1-0.5mm,0.5-0.2mm,0.5-0mm,0.3-0mm
Fine 46mesh-0,60mesh-0,80mesh-0,100mesh-0,120mesh-0,150mesh-0,180mesh-0,200mesh-0,240mesh-0,270mesh-0
Customized size is available upon request


Applications:
1. Shaped and unshaped refractory
Tabular alumina can be used as the main component in aluminum-carbon, aluminum-magnesium-carbon, magnesia-aluminum-carbon, magnesia spinel, aluminum-chromium refractory bricks, or as a component of unshaped refractory products.
2. Sliding nozzle for steel industry
With good thermal shock stability and wear resistance which are required for refractory materials for sliding nozzles, the sintered tabular alumina can precisely meet all the demands as sliding nozzle. The aluminum-carbon sliding nozzle made from sintered tabular alumina mixing with graphite (or carbon black) and antioxidant, or aluminum-zirconium-carbon sliding nozzle made from sintered tabular alumina mixing with appropriate amount of zirconia, graphite (or carbon black) and antioxidant are very popular in steel making industry.
3. Ladle castables (Kiln furniture)
With the continuous development of refining technology outside the furnace, the use environment of refractory materials in ladle is becoming more and more demanding. The molten steel needs to stay longer in the ladle for stirring, heating, and erosion of different steel slags. The single material (such as magnesium or aluminum) of the ladle lining has been replaced by composite materials. The aluminum-magnesium spinel castables made from sintered tabular corundum and spinel is more used for the bottom or wall of the cladding as linings.
4. Refractory prefabrication
Raw materials for breathable bricks, seat bricks, spray guns, impact plates, etc. Those prefabrications produce by tabular alumina are not only part of the refractory lining of the ladle, but also play a very important role in the steelmaking process itself. Adopting tabular alumina will increase wear resistance and corrosion resistance of those products.