Description
High-alumina bricks are generally classified into normal high-alumina bricks and low-creep high-alumina bricks.
High-alumina brick is a kind of neutral refractory materials made from bauxite or other raw materials with a high alumina (Al2O3) content, which contain more than 48% alumina and is formed and calcined at high temperatures. They offer excellent high-temperature resistance, corrosion resistance, thermal stability, and slag resistance, making them particularly suitable for equipment and processes running at high temperatures for a long time.
Low-creep high-alumina brick is a kind of high-grade refractory materials made primarily from superior-grade bauxite, fused corundum, and fused mullite. These bricks feature low creep at high temperatures, strong corrosion resistance, and excellent thermal shock stability, making them ideal for demanding high-temperature applications.
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Advantages
- Superior Wear Resistance: Maintains structural integrity under continuous mechanical stress, extending equipment service life and reducing maintenance frequency.
- Excellent Corrosion Resistance: Withstands acidic and alkaline environments, suitable for various harsh industrial conditions.
- Anti-Spalling Properties: Prevents surface deterioration in thermal cycling conditions, ensuring long-term stability of furnace linings.
- Low Creep Rate: Minimal deformation under high-temperature load, maintaining dimensional stability.
- Outstanding Thermal Shock Stability: Resists cracking from rapid temperature changes, adapting to frequent heating and cooling cycles.
- Extended Service Life: Lasts 1.5 times longer than conventional refractory bricks, significantly reducing replacement costs and downtime.
Specifications
Specifications of High Alumina Brick
| Item | Grade | ||||||
| LZ-80 | LZ-75 | LZ-70 | LZ-65 | LZ-55 | LZ-48 | LZ-65G | |
| ω(Al2O3) / % | ≥80 | ≥75 | ≥70 | ≥65 | ≥55 | ≥48 | ≥65 |
| Open Porosity / % | ≤21(23) | ≤24(26) | ≤24(26) | ≤24(26) | ≤22(24) | ≤22(24) | ≤19 |
| CCS / MPa | ≥70(60) | ≥60(50) | ≥55(45) | ≥50(40) | ≥45(40) | ≥40(35) | ≥60 |
| ≥60(50) | ≥50(40) | ≥45(35) | ≥40(30) | ≥35(30) | ≥30(35) | ≥50 | |
| R.U.L.(0.2 MPa T0.6) / ℃ | ≥1530 | ≥1520 | ≥1510 | ≥1500 | ≥1450 | ≥1420 | ≥1500 |
| HPLC / % | 1500℃×2 h 0.4～0.2 | 1450℃×2 h 0.4～0.1 | 1450℃×2 h 0.2～0 | ||||
| Remarks: The data in parentheses are for the lattice bricks and shaped bricks. | |||||||
Specifications of Low-creep High Alumina Brick
| Item | Grade | |||||||
| DRL-155 | DRL-150 | DRL-145 K | DRL-145 | DRL-140 | DRL-135 | DRL-130 | DRL-127 | |
| ω(Al2O3) /% | ≥75 | ≥75 | ≥65 | ≥65 | ≥65 | ≥60 | ≥50 | |
| ω(Fe2O3) /% | ≤0.8 | ≤1.0 | ≤1.2 | ≤1.5 | ≤1.8 | ≤2.0 | ≤2.0 | |
| ω(TiO2)/% | ≤0.5 | ≤0.8 | ≤1.0 | — | — | — | — | |
| Open Porosity/% | ≤18 | ≤19 | ≤20 | ≤20(22) | ≤20(22) | ≤20(22) | ≤20(22) | ≤21(23) |
| Bulk density/(g/cm³) | ≥2.65 | ≥2.60 | ≥2.50 | ≥2.50 (2.45) | ≥2.45 (2.40) | ≥2.40 (2.35) | ≥2.35 (2.30) | ≥2.30 (2.25) |
| CCS / MPa | ≥70 | ≥70 | ≥60 | ≥65(55) | ≥65(55) | ≥60(50) | ≥60(50) | ≥55(45) |
| 60 | 60 | 50 | 55(45) | 55(45) | 50(40) | 50(40) | 45(35) | |
| 0.2 MPa creep rate (50 h)/% | ≤1550℃ 0.8 | ≤1500℃ 0.8 | ≤1450℃ 0.8 | ≤1400℃ 0.8 | ≤1350℃ 0.8 | ≤1300℃ 0.8 | 1270℃ 0.8 | |
| HPLC / % | 1500℃ ×2 h 0～0.2 | 1500℃×2 h —0.2～0.2 | 1450℃ ×2h —0.2～0.2 | 1450℃×2 h —0.3～0.2 | ||||
| TSR(1100℃, cold water) / Times | ≥15 | ≥15 | ≥30 | ≥15 | — | |||
| Remarks: The data in parentheses are for the lattice bricks. | ||||||||
Sizes
Strip Brick
Wedge Brick
| Types | Size of Wedge Brick | ||
| A | C/D | B | |
| CH1-65/45（T-39） | 114 | 65/45 | 230 |
| CH1-65/55（T-38） | 114 | 65/55 | 230 |
| SH1-65/45（T-20） | 230 | 65/45 | 114 |
| SH1-65/55（T-19） | 230 | 65/55 | 114 |
| SK1P-150/130（G-3） | 230 | 150/130 | 75 |
| SK1.5P-150/135（G-4） | 345 | 150/135 | 75 |
Product Size: We offer refractory brick sizes that comply with ISO, EN, ASTM, JIS, etc, and customized sizes.
Applications
High-alumina bricks can be used as linings for electric arc furnaces, glass melting furnaces, cement rotary kilns, and other similar applications. Low-creep high-alumina bricks are suitable for medium and large hot blast stoves, among others.
Our services: refractory technicians, refractory installation drawings, refractory bricks and castables, refractory masonry services, refractory mixes and precast cell, special shaped bricks, insulation materials, installation supervision, accident investigation and resolution, other customized services.
