Silicon carbide brick, also known as SiC brick, is a premium refractory product made from high-purity silicon carbide raw materials. Known for its high thermal conductivity, excellent corrosion resistance, and superior mechanical strength, it is a popular choice in high-temperature industrial applications where extreme conditions prevail.
What is a Silicon Carbide Brick?
Silicon carbide bricks are a class of advanced refractories designed for harsh thermal and chemical environments. Depending on their bonding types, they can be classified into:
Clay-bonded SiC Bricks
Oxide-bonded SiC Bricks
Recrystallized SiC Bricks
Reaction-bonded SiC Bricks
Key Properties of Silicon Carbide Brick
High thermal conductivity (12–15 W/m·K at 1000°C)
Exceptional resistance to wear, abrasion, and erosion
Outstanding thermal shock resistance
High load-bearing strength under extreme temperatures
Resistance to oxidation and corrosion by acids and alkalis
Applications and Features of Silicon Carbide Brick
Silicon carbide bricks are widely used in:
Steel Industry: Tap holes, ladle linings, troughs in blast furnaces.
Non-Ferrous Metallurgy: Copper and aluminum melting furnaces, launders, burners.
Chemical Processing: Incinerators, reaction vessels, sulfur recovery units (SRU).
Energy Sector: Waste-to-energy boilers and coal gasifiers.
Application Features:
Withstands both oxidizing and reducing atmospheres.
Minimizes heat loss, improving furnace energy efficiency.
Ideal for dynamic or abrasive flow zones due to high strength.
Maintains performance under thermal cycling and mechanical load.
Manufacturing Process of Silicon Carbide Brick
Raw Material Selection: High-purity SiC grains with suitable binders and additives.
Mixing: Uniform blending to ensure density and consistency.
Forming: Pressing, extrusion, or casting based on application needs.
Drying: Controlled drying to avoid cracks or moisture defects.
Firing: Kiln-fired at 1350–1600°C depending on the product type.
Finishing: Machining, trimming, and quality inspection.
Technical Specifications of Silicon Carbide Brick
Item
Oxide Bond
SiC Brick
Green SiC Brick
Corundum Silicon Carbide Brick
Mullite Silicon Carbide Brick
High Alumina SiC Brick
SiC
%
≥ 90
≥ 90
≥ 70
≥ 65
≥ 20
Al2O3
%
—
—
—
≥ 20
≥ 55
Fe2O3
%
≤ 0.6
≤ 0.6
≤ 1.0
≤ 1.0
≤ 1.5
Bulk Density
g/cm³
≥ 2.6
≥ 2.6
≥ 2.7
≥ 2.3
≥ 2.5
Apparent Porosity
%
≤ 17
≤ 17
≤ 22
≤ 20
≤ 20
Cold Crushing Strength
MPa
≥ 100
≥ 100
≥ 100
≥ 80
≥ 80
Refractoriness under load (0.2MPa, 0.6%)
℃
≥ 1650
≥ 1650
≥ 1700
≥ 1600
≥ 1600
Typical Application
Mainly used for lining non-ferrous metal smelting; burning backing board, pushing board, and sagger of industrial ceramics; muffle boot of furnace; lining and igniter of CFBB; lining of garbage incinerators, etc.
Product Benefits of Silicon Carbide Brick
Longer service life reduces maintenance frequency and cost.
High strength under thermal load increases reliability.
Can be custom shaped to fit complex industrial equipment.
Energy Efficiency & Environmental Impact
Reduces fuel consumption through faster heat transfer.
Minimizes thermal loss in industrial kilns and furnaces.
Lower CO2 emissions per ton of product processed.
Less refractory waste from fewer replacement cycles.
Installation and Maintenance Tips
Use compatible mortar with SiC chemistry to prevent mismatch corrosion.
Allow expansion gaps for thermal movement in high-temperature zones.
Install support anchors for vertical applications when needed.
Ramp up furnace temperature slowly during initial startup.
Application Cases of Silicon Carbide Brick
Ironmaking Plant, India: SiC bricks used in blast furnace troughs showed 2.5x longer service life vs. alumina bricks.
Glass Kiln, Turkey: Recrystallized SiC bricks improved thermal efficiency by 18% and reduced maintenance downtime.
Incineration Facility, Germany: SiC lining resisted high-sulfur flue gases with excellent chemical durability.
FAQs of Silicon Carbide Brick
1. What temperature can SiC bricks withstand?
Typically up to 1700°C, depending on the bonding method.
2. Are SiC bricks chemically resistant?
Yes, they resist most acids and alkalis, including slags and fumes.
3. Can they be customized?
Yes, Firebird offers custom sizes, shapes, and machining services.
4. What are their main benefits?
Excellent durability, high conductivity, and resistance to wear.
5. Can SiC bricks save energy?
Yes, their thermal conductivity reduces furnace energy loss significantly.
Contact Firebird for Reliable SiC Solutions
If you are searching for dependable and high-performance silicon carbide refractory bricks, Firebirdoffers customized solutions tailored to your industrial needs. Contact our technical team to request a quote, samples, or technical consultation.
