INSULATING FIRE BRICKS (IFB)
Lightweight backup insulation reducing heat loss and energy bills
PRODUCT OVERVIEW
Insulating fire bricks (IFBs) are manufactured from refractory aggregates with carefully controlled porosity. Their low bulk density and low thermal conductivity make them ideal for backup linings and furnace insulation where minimising heat storage and heat loss is critical to energy efficiency.
KEY PROPERTIES
Bulk Density
0.5 – 1.1 g/cc
Thermal Conductivity
0.15 – 0.35 W/mK
Energy Saving
30–50% vs dense brick
Max Service Temp
Up to 1650°C
Weight Reduction
50–75% vs standard brick
Bond Type
Fired / Organic-bonded
APPLICATIONS
TECHNICAL SPECIFICATIONS
| Grade | Al₂O₃ | Bulk Density | Thermal Cond. | CCS | Max Temp |
|---|---|---|---|---|---|
| IFB-23 | 45% | 0.50 g/cc | 0.15 W/mK | 1.0 MPa | 1260°C |
| IFB-26 | 50% | 0.75 g/cc | 0.20 W/mK | 2.0 MPa | 1430°C |
| IFB-28 | 55% | 0.90 g/cc | 0.25 W/mK | 3.0 MPa | 1540°C |
| IFB-30 | 60% | 1.00 g/cc | 0.30 W/mK | 4.0 MPa | 1600°C |
| IFB-32 | 65% | 1.10 g/cc | 0.35 W/mK | 5.0 MPa | 1650°C |
* Test conditions: IS 1528 (India) / ASTM C-133 / EN 1402. Values are typical — exact data sheets available on request.
AVAILABLE GRADES
INSTALLATION NOTES
- 1
Handle with care — lower crushing strength than dense bricks
- 2
Use lightweight insulating mortar or colloidal silica bonded mortar
- 3
Never expose directly to liquid metal or slag — always use with working lining
- 4
Dry-out schedule: ambient to 200°C at 10°C/hr, hold 4 hrs, then proceed slowly
WHY BUY FROM SHANKER AGENCIES
IFBs paired with a working lining can reduce furnace shell temperatures by 60–80°C and cut energy consumption by up to 30%. Shanker Agencies engineers can calculate the optimal lining thickness for your application.
PARTNER BRANDS
FREQUENTLY ASKED QUESTIONS
An IFB is a porous refractory brick — typically 40–80% porosity by volume — engineered for low thermal conductivity (0.15–0.35 W/mK) and low heat storage. A dense fireclay brick has 22–28% porosity and conducts heat 3–5 times faster. IFBs save energy and lower furnace shell temperatures, but cannot handle direct slag, metal or mechanical abuse like a dense brick can.
QUICK INFORMATION
Max Temperature
1600°C
Category
Shaped Refractories
Grades Available
5 Standard Grades
Industries Served
Brands We Supply
• CUMI Super Refractories
• Divine Cerawool
📦 Quick Delivery
Standard grades in stock — Delhi warehouse. Pan-India delivery in 2–5 days. Same-day dispatch for urgent orders ≤ 2 MT.
MORE IN SHAPED REFRACTORIES
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Fireclay Bricks
Economical, thermally stable bricks for general-purpose furnace linings to 1400°C
Basic Bricks
Magnesia-based bricks resisting basic slags in BOF, EAF and cement kilns
Silicon Carbide Bricks
Outstanding abrasion and wear resistance with high thermal conductivity
READY TO ORDER OR NEED A SAMPLE?
Our engineers can recommend the exact grade for your application. Sample kits available for trials. No minimum order on standard grades.