Mullite Refractory Bricks Supplier- High Temp Industrial Furnaces

As the name suggests, mullite refractory bricks are refractory materials featuring mullite as the primary refractory phase. The most outstanding characteristic is the ability to maintain excellent structural stability at high temperatures while also offering good thermal shock resistance. In other words, while standard refractory bricks primarily ensure the safe and steady operation of a furnace, mullite refractory bricks address the challenge of maintaining stable operation—and reducing the frequency of cracking, deformation, and maintenance—under conditions of prolonged high temperatures, repeated thermal cycling and specific mechanical loads.

Technical Details for Mullite Refractory Bricks

REBO mullite refractory bricks fully comply with international technical standards; if you have specific technical specifications, kiln design requirements, or internal procurement standards, REBO offers full customization support. Here are standard mullite bricks properties for your reference. You can also download the latest catalogue for REBO mullite bricks to learn more details.

Item		MLS-75	MLS-70
Al2O3, %	≥	75	70
SiO2, %	≤	23	25
Fe2O3, %	≤	0.4	0.4
Bulk Density, g/cm3	≥	2.7	2.6
Apparent Porosity, %	≤	18	18
Cold Crushing Strength, MPa	≥	100	100
0.2MPa Refractoriness Under Load, ℃	≥	1680	1680

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REBO Mullite Bricks

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Production of Mullite Bricks in Factory

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REBO Mullite Refractory Bricks

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Factory Production

Suitable Furnaces and Working Condition for Mullite Bricks

Ceramic Firing Kilns

Long-term high-temperature firing requires the furnace lining to possess good dimensional stability.
Subject to thermal cycling due to repeated heating and cooling.
Requires stable temperature distribution within the furnace.
Certain sections must bear structural loads from the furnace roof or walls.

Glass Furnaces

Long-term high-temperature operation.
The lining will face high temperatures and specific mechanical loads.
Requires high-temperature dimensional stability of the refractory bricks.
Chemical corrosion from molten glass, dust, and the furnace atmosphere must be evaluated.

Heat Treatment Furnaces

High-temperature heating and cyclical temperature fluctuations.
Requires the lining to maintain dimensional stability.
Potential for mechanical impact or friction from workpieces inside the furnace.
Requirements for temperature uniformity and lining service life.

Petrochemical Furnaces

Long-term high-temperature operation.
Linings faced with specific mechanical loads.
Potential exposure to high-temperature gases, dust, or chemical corrosion.
Material selection must account for the internal furnace medium, temperature and lining structure.
Learn more cases about mullite refractory bricks on Pinterest.

Reliable Production and Delivery for REBO Mullite Bricks

20+ Years of Manufacturing Experience

Henan REBO Refractory is a manufacturer with over two decades of production experience and established factory operations, rather than a mere trading company. Our production base is located in Xinmi, Henan—China’s premier industrial hub for refractory materials. Since our inception in 2002, we have remained dedicated to refractory production, accumulating extensive expertise in manufacturing processes and quality control.

Annual Capacity of 280,000 Tons

With an annual production capacity of 280,000 tons, we are well-equipped to meet bulk procurement needs for large-scale industrial kilns and inventory stocking. Whether for standard mullite refractory bricks available from stock or precision-engineered custom bricks, we can schedule production to align with specific order requirements. This enables REBO to demonstrate exceptional production and delivery capabilities, even for large-scale orders exceeding hundreds of tons.

3 New Production Kilns

Building upon our existing two 180-meter tunnel kilns, REBO has expanded its facilities by adding a new 120-meter tunnel kiln and 2 shuttle kiln production lines. The two new shuttle kilns are dedicated to manufacturing high-end refractory products, such as mullite, corundum bricks and zirconia bricks. This expansion allows for stricter control over production stability and product quality for our premium refractory range.

Partners in Over 50 Countries

REBO prioritizes not only product quality but also the specific procurement needs of international clients—including technical communication, specification confirmation, packaging, logistics, and quality inspection. Thanks to this commitment to service excellence, REBO serves customers across more than 50 countries and regions, maintaining long-term partnerships with global industry leaders such as RUSAL, POSCO, and BALCO.

Package and Delivery for REBO Mullite Bricks

For bulk orders of mullite bricks, professional packaging and efficient logistics enhance transport safety and reduce overall procurement costs. REBO provides comprehensive export packaging and container loading solutions for these furnace lining bricks. That can cover everything from in-factory quality inspection and export packaging to final transport and delivery. We utilize packaging methods designed for international shipping to minimize the risk of product damage during transit and handling. Leveraging practical loading experience, REBO optimizes container space utilization based on product specifications and packaging dimensions, while ensuring product safety and ease of loading and unloading.

Export-grade pallet packaging with protective measures
Individual carton packaging
Customized packaging printing available
Moisture-proof and impact-resistant protection
Efficient container loading to optimize shipping space
100% safe and reliable delivery

Export Standard Package

Mullite Refractory Brick in Pallet

Delivery to Middle East

Delivery to Europe

How Does REBO Ensure Quality of Mullite Refractory Bricks?

When purchasing hundreds of tons of mullite refractory bricks from a Chinese supplier, customers often have valid concerns:
Will the actual products match what is shown on the website?
Will the bulk shipment differ from the samples?
How do you manage quality control?
Will the supplier pass our company’s or project’s vendor audit?
To address these concerns, REBO invites you to verify the quality of our mullite refractory bricks firsthand.

Raw Material Control

Before entering the production line, every batch of raw materials undergoes testing for particle size and chemical composition; only materials meeting the required standards are approved for production. Furthermore, REBO utilizes an automated batching and mixing system to ensure precise ingredient ratios and uniform blending. This process guarantees stable chemical composition and consistent quality across different production batches.

Dimensional Inspection

REBO understands that for bulk orders of mullite refractory bricks, dimensional consistency directly impacts on-site masonry efficiency and the quality of the furnace lining. Consequently, our quality control department inspects critical dimensions immediately after the bricks are formed and conducts a comprehensive final inspection of each batch—checking length, width, thickness, diagonal measurements, and visual appearance. Only bricks that fully meet the standards proceed to packaging and shipping.

Chemical Composition and Performance Testing

Beyond appearance and dimensions, testing chemical composition and physical properties is crucial for verifying compliance with technical specifications. Before shipment, REBO conducts tests at its in-house laboratory in Xinmi, Henan. These tests cover chemical composition (Al₂O₃, SiO₂, Fe₂O₃, MgO, etc.), cold crushing strength, refractoriness under load, and thermal shock resistance, providing data to support performance in actual high-temperature kiln applications.

Batch Inspection Reports

For all products—whether refractory bricks, insulating soft fire brick, insulation materials or unshaped refractories — REBO Refractory generates detailed quality data and reports based on test results. These reports assist customers with goods acceptance, internal audits, project documentation, and batch quality traceability.

Refractory Lining with Mullite Bricks and Recent Cases

Mullite Bricks in Brazil

Customer Location: Brazil;
Kiln Type: Waste Incinerator;
Application: To withstand the complex, hazardous gases found in incinerators, REBO mullite refractory bricks provide a reliable lining that resists erosion and abrasion from acidic slag.

Mullite Bricks to Saudi Arabia

Customer Location: Saudi Arabia;
Kiln Type: Pyrolysis Furnace;
Application: Used in a petrochemical project in Saudi Arabia, these corundum-fortified mullite refractory bricks withstand high temperatures, severe thermal shock, and chemical gas corrosion.

Mullite Brick In South Korea

Customer Location: South Korea;
Kiln Type: Ceramic Tunnel Kiln;
Application: Custom-shaped mullite refractory bricks for continuous, high-precision ceramic kilns.