Mullite Insulating Brick Jm23 Jm26 Jm28 Refractory Lightweight Fire Brick

• Customization: Available
• Classification: Clay
• Feature: Good Mechanical Strength, Good Thermal Insulation Performance, High-Temperature Resistant, Light Weight, Low Thermal Conductivity, Long Time Materials
• Model NO.: JM23 JM23 JM26 JM28
• Production Process: Extrusion Method
• Refractoriness (℃): 1580< Refractoriness< 1770
• Shape: Brick
• Type: Refractory Material
• Material: Mullite
• Bulk Density(g/cm3): 0.6g/cm3
• Al2O3: 40%
• Size: Customizable
• Certifiacte: ISO9001, CE, etc
• Transport Package: Sea-Worthy Wooden Case
• Specification: 1.0-7.0mm x500x1000mm
• Trademark: jucos
• Origin: China
• HS Code: 6902200000
• Production Capacity: 20000t/Year
• Package Size: 110.00cm * 110.00cm * 100.00cm
• Package Gross Weight: 800.000kg

Product Description

Product Description

Lightweight Insulation Brick is a high-efficiency thermal insulation refractory brick made from high-purity alumina powder, mullite aggregate, and foaming/additive technologies.
It features low bulk density, low thermal conductivity, excellent thermal shock resistance, and good mechanical strength, making it suitable for kiln linings, backup insulation, furnace walls, and high-temperature industrial applications.

Compared with dense refractory bricks, lightweight alumina insulation brick significantly reduces furnace weight, lowers heat storage, and improves overall energy efficiency.

Features

Low Thermal Conductivity
Outstanding insulation performance reduces heat loss.
Lightweight Structure
Bulk density typically 0.6-1.0 g/cm³, easy for installation and furnace design.
High Temperature Resistance
Working temperature up to 1350-1400°C (custom grades available).
Strong Thermal Shock Resistance
Withstands frequent heating & cooling cycles without cracking.
High Purity Alumina + Mullite Structure
Provides stable performance in various furnace atmospheres.
Accurate Dimensions & Smooth Surface
Ensures tight installation and long service life.

Applications

Industrial Furnaces & Kilns
Heat treatment furnaces
Ceramic kilns
Glass furnaces back-up insulation
Lime kiln and rotary kiln insulation
Furnace roof and wall insulation
Aluminum melting furnace back-up layers
Steel ladle preheating furnaces
Petrochemical & Power Industry
Reformers
Cracking furnaces
Boilers and hot blast stoves
Other High-Temperature Areas
Hot face and back-up insulation
Expansion joint filling
High-temperature lining design
Metallurgy & Foundry

Brand roperties	B-1	B-2	B-3	B-4	B-5	B-6	B-7	C-1	C-2
≤ 2.0%Reheating Shrinkage Temp(ºC)	900	1,000	1,100	1,200	1,300	1,400	1,500	1,300	1,400
Bulk Density (g/cm3)	0.70≥	0.70≥	0.75≥	0.80≥	0.80≥	0.90≥	1.00≥	1.10≥	1.20≥
(kg/cm2)ColdCrushing Strength	25≤	25≤	25≤	25≤	25≤	30≤	30≤	50≤	70≤
(W/m.k)at 350ºCThermal conductivity	0.17≥	0.18≥	0.20≥	0.22≥	0.23≥	0.27≥	0.31≥	0.30≥	0.38≥
Main Applications	Ceramic Roller kiln reheating                                                            Reheating Furnace Blast Furnace Petrochemical Furnace General Industrial Furnace etc.

Brand Properties		JM-23	JM -26	JM -28	JM -30	JM -32
Classification temperature  (ºC)		1300	1400	1500	1550	1600
Bulk Density (g/cm3)		0.6	0.8	0.9	1.0	1.1
ColdCrushing Strength(MPa)		1.2	1.8	2.5	3.3	3.5
Modulus of rupture (MPa)		1.0	1.7	2.3	3.1	3.2
(CTºCX24h)Permanent Linear Change(%)		0.6	0.6	0.8	0.9	1.01
@ 1,100ºCThermal Linear Expansion(%)		0.50	0.52	0.52	0.53	0.7
Thermal conductivity (W/m.k)	350ºC	0.18	0.27	0.32	0.38	0.49
	400ºC	0.20	0.29	0.34	0.40	0.5
	600ºC	0.24	0.32	0.36	0.42	0.51
(%)Chemical Analysis	Al2O3	40	56	67	73	77
	Fe2O3	1.0	0.8	0.7	0.7	0.5
Main Applications		Ceramic Roller kiln reheating                                                            Reheating Furnace Blast Furnace Petrochemical Furnace General Industrial Furnace etc.

1. What Is Mullite Insulation Brick Used For?
It is used as a lightweight thermal insulation lining in furnaces and kilns, especially for backup lining and temperature control zones.

2. What Is The Difference Between B1 B2 B3 B5?
These grades represent different density and temperature levels. Higher grades generally offer better heat resistance and strength.

3. What Temperature Can It Withstand?
It is designed for high temperature furnace applications. The suitable grade depends on your working temperature.

4. Can You Provide Custom Sizes?
Yes custom dimensions and cutting according to drawing are available.

5. Is It Suitable For Backup Lining?
Yes it is widely used as backup insulation behind dense refractory bricks.

6. How Is It Packed For Export?
Bricks are packed on pallets with protective film and corner protection to ensure safe shipment.

7. What Information Is Needed For Quotation?
Please provide working temperature, brick size, quantity, and application area for accurate quotation.