Insulating Fire Brick - Heat-retaining Kiln Lining

Types of REBO Insulating Fire Brick

Mullite Insulation Brick

Al₂O₃: ≥42-72%;
Bulk Density: 0.55-1.10 g/cm³;
Classification Temp: 1300-1450ºC;

Fireclay Insulation Brick

Al₂O₃: ≥30-48%;
Bulk Density: 0.6-1.3 g/cm³;
Classification Temp: 1200-1300ºC;

High Alumina Insulation Brick

Al₂O₃: ≥48%;
Bulk Density: ≤0.8-1.2 g/cm³;
Classification Temp: 1250-1350ºC;

Silica Insulation Brick

SiO₂: ≥91%;
Bulk Density: ≥1.0-1.2 g/cm³;
Classification Temp: 1500-1550ºC;

Alumina Bubble Brick

Al₂O₃: ≥85-99%;
Bulk Density: 1.4-1.7 g/cm³;
Classification Temp: 1500-1700ºC;

Leave a Message Send Email

REBO Standard Insulation Fire Brick Dimensions

REBO supplies insulating soft fire brick in standard industry dimensions, with 230 × 114 × 65 mm (9 × 4.5 × 2.5 inch) as the most common size. This straight brick size is widely used around the world, so it is easy to match with existing kiln linings and replace during maintenance. Using standard sizes also helps you plan quantities more accurately and shortens lead time. If your kiln requires a different standard size, please let us know and we will confirm what we can supply.

The standard size of light fire brick has following advantages:

Available from stock for fast delivery;
Fits most existing kiln linings and easy to replace;
Generally lower cost than custom shapes;
Simple to plan, order and install.

Production Cycle of Standard Lightweight Insulation Brick

For standard size soft insulating fire bricks, if stock is available, we can arrange shipment within 7 working days after receiving payment. This helps you restock quickly and keep your kiln maintenance on schedule. Stock levels change, so please contact REBO to confirm the availability of the size and quantity you need.

Production-of-Standard-Size-Insulation-Brick

Production of Standard Insulating Brick

Standard Mullite Insulation Brick

Standard High Alumina Insulation Brick

Standard Fireclay Insulation Brick

Customized Shapes of Refractory Insulation Bricks

If standard and popular shapes do not fit your kiln, REBO offers fully customized shapes made to your kiln drawings and technical blueprints. Our team will review your drawings, confirm the dimensions and tolerances with you, and produce the bricks to match, so they fit on site without extensive cutting. To get a more accurate quotation, please let REBO know:

Kiln or furnace drawings (PDF or CAD), with brick dimensions and shapes;
Dimensional tolerances you require;
Working temperature and the area of use (hot face or backup insulation);
Quantity and delivery destination;
…

How Long Does it Take for Production of Customized Insulation Brick

Customized insulation fire bricks are generally produced within 25 working days. The exact lead time depends on REBO factory’s production schedule at the time of your order, as well as the shape, quantity and complexity of your drawings. Contact us with your requirements and we will confirm the timeline before you place your order.

Custom Kiln Port Insulation Bricks

Custom Insulation Bricks for Furnace Blocking

Thicker Lightweight Brick

Custom-Thinner-Lightweight-Insulation-Brick

Thinner Kiln Insulation Bricks

Bigger Size of Alumina Bubble Brick

Insulation Fire Brick Packaging

To guarantee zero damage during long-distance transit, our insulating firebricks are packed with export-grade heavy-duty packaging:
Sturdy, fumigated wooden pallets.
Cardboard corner protectors and thick paper boards between layers.
Shrink-wrapped with moisture-proof plastic film.
Secured tightly with heavy-duty steel or PET strapping.

Shipping Methods

Trade Terms: FOB, CFR, CIF, DDP, and EXW.
Transport Modes: Primarily shipped via Sea Freight (FCL/LCL) in 20/40ft containers. We also coordinate Railway Freight for Central Asia/Europe and Air/Express Freight for urgent, small-scale sample deliveries.

Loading Capacity

Standard insulation fire brick (230*114*65mm): Due to the lightweight nature of fire brick insulation (IFB), a standard 20ft container (20GP) can accommodate approximately 12,000 to 15,000 bricks (including packaging), depending on the specific grade and its bulk density.

Pellet Package

Delivery to Egypt

Large-scale in REBO Factory

Checking Size

Special-shaped Bricks

Customized Package

Packing Process

Inspect Customized Bricks

REBO As a Global Insulating Fire Brick Supplier

Over the years, REBO has established strong, long-term partnerships with leading enterprises across 30+ countries. From steel manufacturing to non-ferrous metal smelting, our high-temperature solutions keep the world’s most demanding thermal operations running seamlessly.

Iron & Steel Industry

Providing ultra-high-temperature reliability where thermal stress and molten metal erosion are at their peak.
Partners: ArcelorMittal, POSCO, NLMK, Pakistan Steel Mills.

Primary Aluminum Industry

Formulating chemical-resistant refractory solutions to withstand corrosive fluorides and harsh alkali environments.
Partners: CHALCO, RUSAL, Alba, Egypt Aluminium.

Cement & Glass Industries

Delivering energy-saving, low-thermal-conductivity linings that maximize fuel efficiency in massive rotary kilns and glass-melting tanks.
Partners: HWI (HarbisonWalker International), Ghazvin Glass, PROYING, Scybe Glass.

Delivery

Quality Certifications and Global Standards of Insulation Fire Brick

Manufacturing & Quality Control

Every batch of our firebrick insulation undergoes strict ISO 9001 quality control. REBO selects high-purity raw materials with low impurity content and utilize automated tunnel kilns to ensure uniform sintering at 1350℃. Every single brick is precision-ground to achieve smaller dimensional tolerances. This ensures perfect alignment, tight joints, and zero thermal leakage during installation.

International Standards & Compliance

REBO insulated firebrick are fully certified to international standards. We strictly comply with ASTM C155 classifications and ISO standards for refractory materials. We hold valid CE certifications and undergo regular factory audits. All technical specifications including reheat linear shrinkage and cold crushing strength are backed by official, verifiable datasheets.

Third-Party Certified Performance

We offer complete transparency by supporting independent testing from world-class authorities like SGS, etc. Customers can request third-party verification for critical performance metrics, such as thermal conductivity and thermal shock resistance. We provide official test reports directly from these labs to guarantee absolute material integrity before shipment.

Proven Results & Energy Efficiency

REBO materials are proven in demanding environments, notably in Rusal’s aluminum electrolysis and carbon baking furnaces. By replacing traditional lining with our high-strength insulating bricks and refractory bricks, the shell temperature dropped by 45℃, reducing heat loss by 12% and lowering annual fuel costs. The insulation refractory bricks showed zero cracking or peeling after three years of continuous high-temperature operation.

Quality Control

Checking Size Before Delivery

JM Series

Good Package

Precise Size

Controllable Production Process

Large Quantity in Storage

Good Quality

Customized Sizes

Thermal Insulation for Every Kiln Type

Metallurgy and Metal Processing

Specific Areas: Blast furnace hot blast stoves (regenerator walls and checkers), reheating furnace back-ups, aluminum electrolysis reduction cells (base and wall back-up), and melting furnace roofs.
Suitable Insulating Bricks: High Alumina IFB Bricks, Silica Insulating Refractory Bricks, Lightweight Fireclay Refractory Insulation Bricks.

Petrochemical and Chemical Processing

Specific Areas: Ethylene cracking furnace radiant sections, hydrogen furnace back-up linings, ammonia reformer linings, and sulfur recovery unit (SRU) backup insulation.
Suitable Insulating Bricks: Mullite Insulating Bricks, High Alumina Insulating Bricks.

Ceramics and Glass Manufacturing

Specific Areas: Tunnel kiln hot zones (crowns, walls, and car tops), shuttle kilns, glass melting furnace regenerator crowns, and annealing lehrs, and so on.
Suitable Insulating Bricks: Mullite Insulating Bricks, Silica Insulating Bricks, Lightweight Fireclay Bricks, and others.

Cement and Lime Production

Specific Areas: Rotary kiln preheater cyclones, calciner backup insulation linings, cooler hoods, and tertiary air ducts.
Suitable Insulating Bricks: REBO soft fire brick series includes lightweight Fireclay Insulating Bricks, High-Alumina Insulating Bricks…

Industrial Heat Treatment

Specific Areas: Car-bottom heat treatment furnaces, gas nitriding atmosphere furnaces, tempering furnace linings, and forging furnace backup layers.
Suitable Insulating Bricks: Mullite Insulating Bricks, Lightweight Fireclay Insulating Bricks.

Power Generation & Incineration

Specific Areas: Boiler combustion chambers, waste incinerator secondary combustion zones, and flue gas duct linings.
Suitable Insulating Bricks: Lightweight Fireclay Hot Face Insulation Bricks, High-Alumina Insulating Bricks.

$REBO Soft Refractory Brick$

Why Global Partners Choose REBO Insulation Fire Brick

Manufacturing and Production Capabilities

REBO operates a highly modernized manufacturing facility equipped with four advanced light weight fire brick presses delivering pressures from 800 to 1300 tons. Integrated with automated robotic arms, this machinery allows us to produce large soft fire brick shapes up to 1 meter in size. For firing, we run a continuous 120 meter tunnel kiln operating up to 1700℃ for bulk orders, alongside two flexible shuttle kilns dedicated to handling smaller or customized orders.

Financial Stability and Long Term Viability

With a proven operational history spanning more than twenty years, REBO stands as a highly stable partner in the refractory industry. Our long term financial health allows us to consistently invest in advanced technologies and maintain uninterrupted supply chains. By partnering with us, you secure a reliable supplier with the structural resilience and capital strength to support your large scale industrial projects and plant maintenance needs for decades to come.

Comprehensive ESG Compliance

REBO is dedicated to sustainable manufacturing and holds an official Class A environmental rating. Our facility utilizes advanced clean energy systems and dust collection technologies to minimize carbon emissions. This elite eco friendly status guarantees that our production runs continuously and remains completely unaffected during strict national environmental inspections in China. We ensure zero supply chain delays for our global customers while maintaining high standards of environmental care.

Engineering and Installation Turnkey Services

We deliver complete engineering support beyond mere manufacturing. REBO maintains a dedicated technical division specializing in kiln bricklaying and installation guidance services. Our experienced engineering team offers comprehensive structural design, thermal calculation reports, and professional onsite or remote video supervision. This turnkey assistance ensures that all insulation materials are installed to exact technical specifications, maximizing your furnace service life and drastically reducing energy loss. View some cases in Facebook.

End to End Professional Services for Insulation Fire Brick

Pre Sales Routine Services

Material Selection and Lining Optimization
REBO guides you in choosing the correct grade of soft refractory brick, such as deciding between mullite JM23 or JM26, based on your target furnace temperature. Our team ensures you select the most cost effective thickness and grade, preventing over engineering while maximizing thermal insulation performance.

Detailed Quantity Calculations and Cost Estimates
Based on your furnace dimensions, we provide fast and accurate material quantity calculations. We supply transparent, itemized quotation sheets so you can plan your procurement budget precisely, ensuring you order exactly what is needed without unnecessary material waste.

In Sales Coordination

Standard Batch Testing and Status Reporting
During production, we conduct routine laboratory checks on every batch for density and cold crushing strength. We share these standard quality test reports with you prior to shipping, keeping you updated on your order status so you have complete peace of mind.

Customs Documentation and Multimodal Logistics Support
REBO will assit to prepare all necessary export documents, including certificates of origin, packing lists and commercial invoices to ensure smooth customs clearance. Moreover, RRBO logistics team coordinates with international shipping companies to organize hassle free transport to your designated port.

Post Sales Support

Refractory Mortar Matching and Masonry Advice
To ensure safe operation, REBO will advise you on the correct type of refractory mortar to use with our lightweight fire bricks to ensure a perfect thermal seal. We provide standard masonry guidelines, helping your local workers understand the proper joint thickness and correct handling of the lightweight refractory bricks during installation.

Routine Performance Follow Ups
We conduct scheduled follow ups after your furnace is commissioned to ensure the lining is performing as expected. Our team remains available to answer standard operating questions, helping you maintain the long term stability and energy efficiency of your insulation lining.

$REBO Soft Refractory Brick$

Customized Type

$REBO Soft Refractory Brick$

Large Scale Production

$REBO Insulation Refractory Brick$

Shipment Tracking

$REBO Insulation Refractory Brick$

Large Stock Available

FAQs of Insulation Fire Brick

Q: What Is an Insulation Fire Brick?

A: An insulated fire bricks for sale is a lightweight refractory material designed with high porosity and low thermal conductivity. Unlike heavy, dense refractory bricks that are built to store heat and resist mechanical wear, insulation bricks for furnace are engineered to trap heat inside the kiln. This specialized structure prevents heat from escaping through the furnace walls, which significantly reduces fuel consumption and improves overall energy efficiency.

Q: What Is the Difference Between a Refractory Fire Brick and an Insulation Fire Brick?

A: The main differences lie in density, strength, and thermal conductivity. High temperature insulation bricks are dense, heavy, and highly resistant to chemical slag, mechanical wear, and direct flame contact, making them ideal for the working linings of kilns. In contrast, insulating fire bricks are extremely lightweight, containing fine air pores that block heat transfer. While insulating bricks have lower mechanical strength and cannot withstand direct physical wear, they provide the essential thermal barrier behind the dense working lining to save energy.

Q: How Can I Get a Quotation for My Project?

A: To receive an accurate and competitive price quotation, please send us your basic project details. Useful information includes the exact brick dimensions and shapes, your required quantities, the target operating temperature, and the specific type of kiln or furnace you are operating. Once we receive these details, our engineering and sales team will analyze your requirements and contact you with a formal quote as soon as possible.

Q: How Many Insulation Fire Brick Can Fit on One Pallet or Inside a Twenty Foot or Forty Foot Container?

A: The exact loading capacity depends entirely on the specific classification, density, and size of the cold face insulation bricks you select. Lightweight bricks vary in weight, which directly affects the shipping payload and packing volume. Please submit your specific product selection and required quantities to our logistics team, and we will calculate the precise packing configuration and container volume for your order.

Q: Can Insulating Fire Bricks Be Customized to Custom Shapes or Non Standard Sizes?

A: Yes. We offer comprehensive customization options. Our advanced processing division can cut, grind, and mill standard insulating bricks into specialized shapes, such as arch kiln insulation bricks, wedge bricks, burner tiles, and custom hanger blocks. Simply provide your engineering drawings or dimensional requirements, and we will manufacture them to meet your exact specifications.

Q: How Do I Choose Between Different Grades of Insulation Fire Brick like JM23, JM26, and JM28?

A: The classification number corresponds to the maximum service temperature of the lightweight insulating fire bricks. For example, JM23 is rated for continuous use up to 1260 degrees Celsius, JM26 up to 1430 degrees Celsius, and JM28 up to 1540 degrees Celsius. You should select the grade based on your maximum furnace operating temperature, ensuring you choose a brick rated at least 100 degrees Celsius higher than your actual furnace temperature to guarantee safety.

Q: Are Refractory Bricks and Insulation Fire Brick the Same Thing?

A: The terms are used interchangeably. “Fire bricks” is the common consumer term; “refractory bricks” is the standard industrial and technical term. Both refer to the same category of heat-resistant ceramic refractory bricks. Soft insulating fire brick is the materials to keep hot.

Q: What Are the Standard Insulation Bricks Specifications?

A: Standard insulating fire bricks are classified by their temperature limits and physical properties under ASTM standards. Common specifications include classifications from Group 20 up to Group 32 (such as JM23, JM26, and JM28). Key specifications you should look for include bulk density (typically ranging from 0.5 to 1.0 grams per cubic centimeter), cold crushing strength (typically between 1.0 and 3.0 Megapascals), and reheat linear change. Standard dimensions usually follow the 230 by 114 by 65 millimeter format, but custom shapes can be machined to meet specific furnace drawings.

Q: What Is the Typical Chemical Insulation Bricks Composition?

A: What is the typical chemical insulation bricks composition?
A: The composition of insulating bricks determines their maximum service temperature and chemical resistance. Most premium insulating bricks are made from high purity refractory clays and synthetic raw materials, resulting in a composition primarily of Alumina (Al2O3) and Silica (SiO2). For standard temperature grades, Alumina content ranges from 30% to 45%. For high temperature mullite grades like JM28 or JM30, Alumina content can reach up to 60% or higher. Crucially, high quality insulating soft fire bricks maintain extremely low levels of Iron Oxide (Fe2O3) and Alkalies (less than 1% combined) to prevent carbon monoxide attack in reducing atmospheres.

Q: How Is the Insulation Bricks Price Calculated for Bulk Orders?

A: The price of insulating fire bricks is determined by three main factors: the temperature grade, the specific shape complexity, and the total order volume. To get the most accurate and competitive bulk pricing, please contact our sales team with your exact dimensional drawings and target quantities to get insulating firebrick price.

Q: Why Should We Source from Professional Insulating Fire Brick Manufacturers?

A: Sourcing directly from established manufacturers like REBO ensures that you receive verified material grades, stable quality, and factory direct pricing. Unlike trading companies, true manufacturers control the entire production cycle, from raw material selection and high pressure forming to high temperature sintering in continuous tunnel kilns. This direct control guarantees consistent bulk density and thermal conductivity across every batch. Furthermore, direct insulating fire brick suppliers can offer custom mold fabrication, raw material traceability, and reliable shipping schedules that third party agents simply cannot match.