Description
High alumina brick is a type of refractory brick made from bauxite and other high-alumina raw materials. JHYRef high alumina bricks are available in different Al2O3 content grades, ranging from ≥48% to ≥80%, to meet different furnace lining requirements.
Compared with ordinary clay bricks, high alumina bricks provide higher refractoriness, better mechanical strength and improved resistance to wear and corrosion. They are widely used in high-temperature industrial furnaces where the lining must withstand heat, load, chemical attack and thermal fluctuation.
JHYRef supplies both normal high alumina bricks and low-creep high alumina bricks. The proper grade should be selected according to the furnace type, lining position, operating temperature, slag contact, mechanical load and service condition.
Product Types
Normal High Alumina Brick
Normal high alumina bricks are made from bauxite or other high-alumina raw materials through forming and high-temperature firing. They are suitable for general high-temperature furnace lining areas that require refractoriness, corrosion resistance, wear resistance and thermal stability.
The available grades include LZ-48, LZ-55, LZ-65, LZ-70, LZ-75 and LZ-80. These grades provide different Al2O3 content levels and physical properties, allowing users to choose suitable products according to actual furnace working conditions.
Low-Creep High Alumina Brick
Low-creep high alumina bricks are made mainly from superior-grade bauxite, fused corundum and fused mullite. They are designed for furnace areas where long-term high-temperature load and dimensional stability are important.
The available low-creep grades include DRL-155, DRL-150, DRL-145, DRL-140, DRL-135, DRL-130 and DRL-127. These products are suitable for medium and large hot blast stoves and other high-temperature lining areas where low creep performance is required.
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.
Custom Sizes and Shapes
JHYRef supplies standard high alumina bricks in common refractory brick sizes. Strip bricks and wedge bricks are available for different masonry structures, including straight walls, arches, rings and curved lining areas.
Product sizes can comply with ISO, EN, ASTM and JIS standards. Customized sizes can also be supplied according to furnace drawings, installation positions and project requirements.
For special furnace lining structures, shaped bricks can be discussed according to drawings. Suitable brick size and shape selection can help improve masonry accuracy, reduce on-site cutting work and support better lining installation.
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.
Service Support
JHYRef can provide technical support for refractory product selection and lining structure discussion. According to project requirements, refractory installation drawings, refractory bricks and castables, masonry services, refractory mixes, precast parts, special shaped bricks, insulation materials and installation supervision can be discussed.
For furnace lining maintenance or lining problems, technical communication can be carried out based on actual operating conditions, lining drawings, damaged lining photos and project information. This helps customers choose suitable refractory materials and improve the reliability of the furnace lining system.
FAQ
JHYRef supplies normal high alumina bricks and low-creep high alumina bricks. Normal high alumina bricks are suitable for general high-temperature furnace lining areas, while low-creep high alumina bricks are used where long-term high-temperature load and dimensional stability are required.
Yes. Standard sizes complying with ISO, EN, ASTM and JIS can be supplied, and customized sizes can be made according to drawings and project requirements.
High alumina bricks are used in electric arc furnaces, glass melting furnaces, cement rotary kilns, hot blast furnaces and other high-temperature industrial furnace linings.
