Thermal Insulation MaterialsInsulating bricks
Alumina Bubble Brick
Insulating brick based on hollow alumina spheres with a high working temperature and good high-temperature insulation, in Al₂O₃ 99, 95 and 90 % series and three density grades each.
- Grades / types
- 9 grades, LQZ99-1.4 to LQZ90-1.8
- Specification tables
- 3: LQZ99 series; LQZ95 series; LQZ90 series
Product overview
Alumina bubble brick has a high working temperature and good heat insulation at high temperature. It gives clear benefits in reducing furnace weight, modifying the lining structure and saving material and energy.
Key characteristics
- High working temperature
- Good heat insulation at high temperature
- Lower furnace weight
- Material and energy saving
- Three alumina series, three density grades each
Technical data
| Property | Unit | LQZ99-1.4 | LQZ99-1.6 | LQZ99-1.8 |
|---|---|---|---|---|
| Al₂O₃ | % | ≥99 | ≥99 | ≥99 |
| SiO₂ | % | ≤0.3 | ≤0.3 | ≤0.3 |
| Fe₂O₃ | % | ≤0.2 | ≤0.2 | ≤0.2 |
| Bulk Density | g/cm³ | 1.3~1.5 | 1.5~1.7 | 1.7~1.9 |
| Cold Crushing Strength (CCS) | MPa | ≥6 | ≥10 | ≥12 |
| Thermal Conductivity (Hot Side 1000℃) | W/(m·K) | ≤0.9 | ≤1.1 | ≤1.2 |
| Permanent Linear Change (PLC) (1600℃×3h) | % | ±0.3 | ±0.3 | ±0.3 |
| Property | Unit | LQZ95-1.4 | LQZ95-1.6 | LQZ95-1.8 |
|---|---|---|---|---|
| Al₂O₃ | % | ≥95 | ≥95 | ≥95 |
| Fe₂O₃ | % | ≤0.2 | ≤0.2 | ≤0.2 |
| Bulk Density | g/cm³ | 1.3~1.5 | 1.5~1.7 | 1.7~1.9 |
| Cold Crushing Strength (CCS) | MPa | ≥8 | ≥12 | ≥16 |
| Thermal Conductivity (Hot Side 1000℃) | W/(m·K) | ≤0.9 | ≤1.1 | ≤1.2 |
| Permanent Linear Change (PLC) (1600℃×3h) | % | ±0.3 | ±0.3 | ±0.3 |
| Property | Unit | LQZ90-1.4 | LQZ90-1.6 | LQZ90-1.8 |
|---|---|---|---|---|
| Al₂O₃ | % | ≥90 | ≥90 | ≥90 |
| Fe₂O₃ | % | ≤0.2 | ≤0.2 | ≤0.2 |
| Bulk Density | g/cm³ | 1.3~1.5 | 1.5~1.7 | 1.7~1.9 |
| Cold Crushing Strength (CCS) | MPa | ≥10 | ≥14 | ≥18 |
| Thermal Conductivity (Hot Side 1000℃) | W/(m·K) | ≤0.9 | ≤1.1 | ≤1.2 |
| Permanent Linear Change (PLC) (1600℃×3h) | % | ±0.3 | ±0.3 | ±0.3 |
Where Refractories Are Used
Industry
Steel & Iron
Refractories in iron and steel production are used in the blast furnace, hot blast stove, cast house and coke oven on the ironmaking side, and in the hot metal ladle, converter, electric arc furnace, steel ladle, tundish, RH degasser and reheating furnace on the steelmaking side. Material selection varies by operating zone and includes silica, high alumina, magnesia, magnesia-carbon, alumina-silicon carbide-carbon and silicon carbide products together with castables, ramming mixes and mortars.
Explore IndustryIndustry
Chemical & Petrochemical
Refractories in chemical and petrochemical plants line coal water slurry and residue oil gasifiers, secondary reformers, carbon black reactors, hydrogen production furnaces, gas generators and cracking furnaces. The technical reference's gasifier schemes build the lining from a high chrome brick working face, a chrome corundum brick backing, an alumina bubble brick insulating layer, refractory castables and a ceramic fibre coating or felt against the shell.
Explore Industry
Available grades, shapes and sizes
Available grades
- LQZ99-1.4
- LQZ99-1.6
- LQZ99-1.8
- LQZ95-1.4
- LQZ95-1.6
- LQZ95-1.8
- LQZ90-1.4
- LQZ90-1.6
- LQZ90-1.8
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Technical Consultation
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