Insulation Brick

China Factory High-Density Lightweight Mullite Brick with Fireproof Insulation

Product Description:

Product descriptions from the supplier

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Product Brief

Our lightweight insulating fire brick is energy-saving refractory insulation material, mainly including clay insulation brick and high alumina insulation brick. Custom large-size insulation brick and special shaped brick are available. This series brick is professionally manufactured for glass melting furnace, kiln back lining, regenerator and high-temperature flue insulation. Featuring low bulk density, low thermal conductivity, excellent heat insulation and great thermal shock resistance, it effectively reduce kiln heat loss and save operating energy cost.

Key Features

Premium insulation performance, stable heat preservation effect, 20%-30% energy saving for industrial high-temperature kilns
High temperature resistance, long-term service temperature from 800℃ to 1400℃, low reheating linear change, no crack or peeling under frequent temperature change
Light weight, easy to cut, grind and construct on site, matched refractory fire mortar for easy masonry
Low iron & low alkali raw material formula, no pollution to glass liquid, perfect for glass kiln bottom backup insulation
Rich shape options: standard straight brick, wedge brick, arch brick, tongue-and-groove brick, customized big-size integral brick
Good oxidation resistance and chemical corrosion resistance, long service life for continuous industrial kiln working

Product Specifications

Grade Complete Model: JM20,JM23,JM26,JM28,JM30,JM32 Lightweight Clay Insulation Brick, High Alumina Insulation Brick

Standard Size: 230*114*65mm

Custom Size: 800mm/1000mm/1200mm large-size insulation brick

Bulk Density: 0.4/0.6/0.8/1.0/1.2/1.3 g/cm³ (Customized per grade)

Cold Crushing Strength: 1.2-6.5MPa, upgraded strength for glass kiln bottom load-bearing use

Custom processing: size tolerance, reserved lifting hole, notch, chamfer edge available

Technical Data Sheet – Insulation Bricks (JM Series)

Item	JM20	JM23	JM26	JM28	JM30	JM32
Al₂O₃ (%)	≥35	≥42	≥48	≥52	≥58	≥65
Bulk Density (g/cm³)	0.6–1.0	0.6–1.0	0.6–1.0	1.0	1.2	1.3
Cold Crushing Strength (MPa)	2–5	2–5	2–5	5	8	10
Refractoriness (°C)	≥1200	≥1300	≥1400	≥1450	≥1550	≥1600
Max Service Temperature (°C)	1250	1350	1450	1500	1550	1600
Permanent Linear Change (%)	≤0.5 (1200°C×6h)	≤0.5 (1300°C×8h)	≤0.5 (1400°C×8h)	≤0.5 (1450°C×8h)	≤0.4 (1550°C×8h)	≤0.4 (1600°C×8h)
Thermal Conductivity (W/m·K) @ 800°C	≤0.24	≤0.24	≤0.24	≤0.38	≤0.42	≤0.48

Item	JM20	JM23	JM26	JM28	JM30	JM32
Al₂O₃ (%)	≥35	≥42	≥48	≥52	≥58	≥65
Bulk Density (g/cm³)	0.6–1.0	0.6–1.0	0.6–1.0	1.0	1.2	1.3
Cold Crushing Strength (MPa)	2–5	2–5	2–5	5	8	10
Refractoriness (°C)	≥1200	≥1300	≥1400	≥1450	≥1550	≥1600
Max Service Temperature (°C)	1250	1350	1450	1500	1550	1600
Permanent Linear Change (%)	≤0.5 (1200°C×6h)	≤0.5 (1300°C×8h)	≤0.5 (1400°C×8h)	≤0.5 (1450°C×8h)	≤0.4 (1550°C×8h)	≤0.4 (1600°C×8h)
Thermal Conductivity (W/m·K) @ 800°C	≤0.24	≤0.24	≤0.24	≤0.38	≤0.42	≤0.48

Application Range

Glass Industry: Glass melting furnace pool bottom backing layer, annealing furnace, regenerator, flue insulation
Building Ceramic Industry: Tunnel kiln, shuttle kiln, rotary kiln inner insulation lining
Metallurgy & Chemical Industry: Industrial heating furnace, heat treatment furnace, high-temperature reaction equipment
Other Usage: Industrial boiler, high-temperature oven, industrial pipeline heat preservation

Our Service & Packaging

Manufacture: Machine pressed & integral cast molding, strict quality inspection, official test report provided
Export Package: Standard fumigated wooden pallet, wrapped with stretch film and fixed by steel belt, waterproof and anti-collision
Custom Service: OEM & ODM support, free CAD drawing design, professional masonry technical support