Category
Alumina hollow ball brick
Classification:
Product Introduction
Product Details
Production method:
Alumina hollow ball brick refractoriness can reach more than 1750 degrees, good thermal stability, re-burning line change rate is small, durable. Strong thermal insulation characteristics, low thermal conductivity. Alumina hollow spherical bricks can be used for high temperature energy-saving inverted flame kiln, shuttle kiln, molybdenum wire furnace, tungsten rod furnace, induction furnace, nitride furnace, etc.
Product details: Alumina hollow ball brick is made of alumina hollow ball and alumina powder as the main raw materials, combined with other binding agents, after 1750 degrees high temperature firing, the use temperature can reach 1800 ℃, the product has high mechanical strength, several times of the general light products, and the volume density is only 1/2 of corundum products.
Product characteristics: alumina hollow ball brick refractoriness can reach more than 1750 degrees, with good thermal stability, re-burning line change rate is small, durable. Strong thermal insulation characteristics, low thermal conductivity.
Product use: Alumina hollow ball brick can be used for high temperature energy-saving inverted flame kiln, shuttle kiln, molybdenum wire furnace, tungsten rod furnace, induction furnace, nitriding furnace, etc.
Physical and chemical indicators:
Physical And Chemical Index | ||||
Physical And Chemical Indexes Of Alumina Hollow Ball Brick | ||||
Project | Alumina Hollow Ball Brick |
|
| Zirconia Hollow Spherical Brick |
Model | 85 Bricks | 90 Bricks | 99 Bricks | 98 Brick |
Maximum Use Temperature ℃ | 1680 | 1700 | 1800 | 2200 |
Al203% | ≥85 | ≥ 90 | ≥99 |
|
ZrO2% |
|
|
| ≥ 98 (Stabilizer) |
Si02% | ≤ 13 | ≤ 8 | ≤0.2 | ≤0.2 |
Fe203% | ≤0.2 | ≤0.2 | ≤0.2 | ≤0.2 |
Bulk Density g/cm³ | 1.4-1.7 | 1.4-17 | 1.4-17 | ≤3.0 |
Normal Temperature Compressive Strength MPa | ≥12 | ≥ 10 | ≥ 9 | ≥8 |
Load Softening Start Temperature ℃ | ≥ 1650 | ≥ 1700 | ≥ 1700 | ≥ 1700 |
Reburning Line Change Rate%(1600 ℃ * 3h) | ±0.3 | ±0.3 | ±0.3 | ±0.2 |
Coefficient Of Thermal Expansion * 10 | -7.8 | -8 | -8.6 | -9.1 |
Thermal Conductivity w/(m.k)(Average Temperature 800 ℃) | ≤ 0.8 | ≤0.3 | ≤1.5 | ≤0.3 |
Keywords:
Alumina hollow ball brick
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