Description
High alumina refractory bricks are specialized refractory materials used in industries requiring extreme thermal, mechanical, and chemical stability. These bricks are essential in high-temperature processes like metallurgy, cement manufacturing, glass production, and incineration. Their superior resistance to thermal shock, slag attack, and mechanical stress makes them indispensable in demanding environments.
Laurel high alumina bricks are produced with selected bauxite chamotte using advanced processes and strict quality control. The main mineral components are corundum and mullite phases. It features excellent high-temperature mechanics and chemical corrosion resistance.
Features
1. Resisting high temperature - High alumina bricks can withstand extreme temperatures, usually between 1400°C and 1800°C.
2. Good Chemical Resistance - They are Resistant to corrosion from slags, alkalis, and acids, making them ideal for harsh environments.
3. Excellent Slag Resistance - Suitable for applications in furnaces and kilns exposed to aggressive slags and fluxes.
4. High Strength and Hardness - Offers superior mechanical strength and resistance to wear and abrasion.
5. High Refractoriness Under Load (RUL) - Can maintain structural integrity under heavy loads at high temperatures.
Applications
1. Metallurgical Industry
- Steel Industry: Used in blast furnaces, ladles, hot metal mixers, torpedo cars, and steel refining furnaces.
- Non-Ferrous Metal Industry: Lining for aluminum smelters, copper converters, and zinc refining furnaces.
2. Petrochemical & Power Generation
- Lining for boilers, fluidized bed reactors, and coal gasification plants.
- Essential in waste incinerators, thermal cracking units, and refinery heaters.
3. Glass & Ceramic Industry
- Used in glass-melting tanks, regenerators, and ceramic kilns.
- High resistance to corrosive molten glass and flux materials.
4. Cement & Lime Industry
- Essential for rotary kilns, clinker coolers, preheater cyclones, and calcination units.
- High resistance to alkali attack and thermal cycling.
Specifications
| Ordinary High Alumina Brick |
| Item | HA60 | HA70 | HA75 | HA80 |
| AL2O3 (%) | ≥60 | ≥70 | ≥75 | ≥75-80 |
| SIO2 (%) | 32 | 22 | 20 | ≥18 |
| Fe2O3 (%) | ≤1.8 | ≤1.8 | ≤1.8 | ≤1.8 |
| Refractoriness (°C) | 1790 | ＞1800 | ＞1825 | ≥1850 |
| Bulk density (g/cm3) | 2.4 | 2.45-2.5 | 2.5 | 2.55-2.6 |
| Softening temperature under load | ≥1470 | ≥1520 | ≥1530 | ≥1550 |
| Apparent porosity (%) | 22 | ＜21 | ＜21 | ＜20 |
| Cold Crushing strength (Mpa) | ≥45 | ≥50 | ≥54 | ≥60 |
| Phosphate Bonded High Alumina Brick |
| Item | LAP75 | LAP77 | LAP85 |
| AL2O3 (%) | ≥75 | ≥77 | ≥80-85 |
| Fe2O3 (%) | ≤3.0 | ≤3.0 | ≤1.8 |
| CaO (%) | ≤0.6 | ≤0.6 | ≤0.6 |
| Refractoriness (°C) | ≥1800 | ≥1800 | ≥1850 |
| Bulk density (g/cm3) | ≥2.65 | ≥2.70 | ≥2.80 |
| Cold crushing strength (MPa) | ≥60 | ≥64 | ≥110 |
| Refractoriness under load (0.2MPa °C) | ≥1350 | ≥1300 | ≥1350 |
| Applications | Used for high-temperature parts lining of cement rotary kiln | Used for badly worn parts of the cement rotary kiln |
Competitive Advantage
- Competitive Price: Make the products competitive in your market.
- Abundant Experience: Prevent cracks and twists in bricks.
- Different Moulds: Save mould fees for you.
- Strict Quality Control: Meet clients’ quality requirements.
- Large stocks: Guarantee prompt delivery.
- Professional Packing: Avoid damage and secure the goods in transportation.
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High Alumina Refractory Brick Images
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