High Alumina Silica Bricks

Key Features at a Glance

• Withstand 1400–1750°C continuous service temperatures

   

• High alumina + silica formula for excellent structural strength

   

• Superior resistance to slag, alkali, and acidic corrosion

   

• Low porosity & high density for long service life

   

• Excellent mechanical strength & thermal shock stability

   

• Available in standard & fully customized shapes

   

• ISO 9001 certified manufacturing with 100% QC tracing

   

1. What Is a High Alumina Silica Brick?

High Alumina Silica Brick is a type of alumina–silicate refractory brick made from high-purity bauxite, fireclay, fused alumina, and silica. Its Al₂O₃ content typically ranges from 48% to 85%, with SiO₂ forming the balance. This composition delivers:

• High refractoriness

   

• Strong chemical corrosion resistance

   

• Excellent load-bearing performance at high temperature

   

• Dimensional stability under thermal cycling

   

Compared with ordinary fireclay bricks, high alumina silica bricks offer:

2. Chemical Composition (Typical Range)

Highland can adjust chemical composition based on:

• Temperature

   

• Atmosphere (acidic / alkaline / reducing)

   

• Erosion conditions

   

• Wear resistance requirements

   

3. Physical Properties

Highland provides full QC data sheets with every shipment.

4. Types of High Alumina Silica Bricks

(1) Fire Clay Bricks (Al₂O₃ 25–48%)

• Cost-effective

   

• Good thermal shock resistance

   

• Used for low–medium temp zones

   

(2) High Alumina Bricks (Al₂O₃ 48–80%)

• High refractoriness

   

• Strong corrosion resistance

   

• Ideal for steelmaking furnaces & cement kilns

   

(3) Corundum Bricks (Al₂O₃ > 90%)

• Excellent strength & erosion resistance

   

• Suitable for extreme temperature & heavy wear

   

(4) Mullite Bricks

• Balanced thermal shock + high temp strength

   

• Common in ceramic kilns & hot blast stoves

   

(5) Alumina–SiC–C Bricks

• High thermal shock resistance

   

• Excellent molten metal erosion resistance

   

• Popular in iron & steel runner systems

   

(6) Silica Bricks (SiO₂ > 94%)

• Strong acid slag resistance

   

• Ideal for glass furnaces & coke ovens

   

5. Standard & Customized Sizes

Standard Dimensions

• 230 × 114 × 65 mm

   

• 230 × 114 × 75 mm

   

• 250 × 124 × 65 mm

   

• 300 × 150 × 75 mm

   

Available Shapes

• Straight bricks

   

• Wedge bricks

   

• Arch bricks

   

• Key bricks

   

• Checker bricks

   

• Anchor bricks

   

• Skew bricks

   

• Runner bricks

   

• Ladle bricks

   

• Custom OEM shapes according to your drawings

   

Highland can manufacture complex shapes with ±1 mm tolerance.

6. Applications of High Alumina Silica Brick

Steel Industry

• Blast furnace lining

   

• Hot blast stove checker bricks

   

• Electric arc furnace roof

   

• Steel ladle lining

   

Cement Industry

• Rotary kiln transition zone

   

• Preheater & calciner

   

• Clinker cooler walls

   

Glass Industry

• Regenerative chamber

   

• Melting tank sidewalls

   

• Crown area (for silica-rich compositions)

   

Ceramics Industry

• Tunnel kiln

   

• Shuttle kiln

   

• Roller kiln supports

   

Petrochemical & Power

• Gasifiers

   

• Incinerators

   

• Waste-to-energy boilers

   

High alumina silica bricks are ideal for all medium-to-high temperature industrial equipment.

7. Key Advantages

• High-temperature resistance (up to 1750°C)

   

• Excellent resistance to alkali & acidic slags

   

• High compressive strength for load-bearing areas

   

• Low porosity → longer service life

   

• Good thermal shock resistance

   

• Dimensional stability under long-term cycling

   

• Energy-saving with better insulation

   

• Versatile for many furnace designs

   

Highland’s optimized firing process ensures reliable performance under harsh conditions.

8. Manufacturing Process

1. Raw Material Selection

    

   • High-purity bauxite & silica

      

   • Fused alumina / fused mullite for premium grades

      

2. Crushing & Grinding

    

   • Controlled particle size to ensure density & strength

      

3. Batching & Mixing

    

   • Accurate formulas with continuous mixer

      

4. Pressing / Molding

    

   • Hydraulic pressing (100–400 tons pressure)

      

5. Drying

    

   • Fully controlled drying chambers

      

6. Sintering

    

   • High-temperature tunnel kilns ≥ 1500–1750°C

      

7. Final QC Inspection

    

   • Size checking

      

   • CCS

      

   • Porosity

      

   • Bulk density

      

   • RUL testing

      

Every brick is batch-marked for full traceability.

9. Quality Control & Certifications

Highland Refractory strictly follows:

• ISO 9001:2015

   

• ISO 14001

   

• CE / SGS / BV testing available

   

• Incoming raw material inspection

   

• In-process sampling every batch

   

• Full physical/chemical test reports before shipment

   

10. Packaging & Shipping

To prevent damage and moisture absorption:

• Export fumigation-free wooden pallets

   

• PE waterproof wrapping

   

• Edge protection

   

• Steel belt reinforcement

   

• Shipping options: CIF / FOB / DAP

   

• 7–15 days delivery after payment

   

Worldwide delivery to over 65+ countries.

11. FAQ

Q1: What is the service temperature of high alumina silica brick?

1400–1750°C depending on grade.

Q2: Can you customize shapes based on drawings?

Yes, Highland specializes in complex OEM refractory shapes.

Q3: Do you offer samples?

Yes, free samples are available; customers pay shipping.

Q4: What is the minimum order quantity?

Usually 3–5 tons, depending on type and size.

Q5: What information is needed for a quotation?

• Al₂O₃–SiO₂ content

   

• Operating temperature

   

• Shape & drawings

   

• Quantity

   

• Application industry

   

12. Get a Fast Quote

Looking for reliable High Alumina Silica Bricks?
Highland Refractory provides:

• Factory-direct price

   

• High-purity raw materials

   

• Professional engineering support

   

• Customized shapes & technical recommendations

   

👉 Contact us today for a quotation within 12 hours.