Mullite Insulation Brick

Al2O3% (≥) 40-75

Bulk Density (g/cm³)0.55-1.35

Classification Temperature (℃) 1080-1570

Compressive Strength (MPa) 1-3.5

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Lightweight mullite insulating bricks

Lightweight mullite insulating bricks, often referred to as lightweight mullite thermal insulation bricks, are a category of thermal insulation bricks capable of withstanding high temperatures exceeding 1790℃. These bricks display a refractory under load temperature range of 1600-1700℃ . They are lauded for their excellent thermal shock resistance, high strength, low high-temperature creep rate, and minimal expansion coefficient. Furthermore, lightweight mullite bricks feature a small thermal coefficient and display excellent resistance to acidic slag erosion. The use of these bricks can significantly reduce the weight of high-temperature furnace bodies, encouraging structural transformation, material savings, energy conservation, and an overall increase in production efficiency.

Item		Specification
Item		JM23	JM25	JM26	JM27	JM28	JM30	JM32
Al₂O₃ %		≥40	≥50	≥55	≥60	≥65	≥70	≥75
Fe₂O₃ %		≤1.0	≤1.0	≤0.9	≤0.8	≤0.7	≤0.6	≤0.5
Bulk Density, g/cm³		≤0.55	≤0.80	≤0.85	≤0.95	≤0.95	≤1.05	≤1.35
Compressive strength, MPa		≥1.0	≥1.5	≥2.0	≥2.5	≥2.5	≥3.0	≥3.5
Permanent Linear Change% 12h		1230℃	1350℃	1400℃	1450℃	1510℃	1620℃	1730℃
Permanent Linear Change% 12h		-1.5~0.5
Thermal Conductivity, W/(m·K)	200±25℃	≤0.18	≤0.26	≤0.28	≤0.32	≤0.35	≤0.42	≤0.56
	350±25℃	≤0.20	≤0.28	≤0.30	≤0.32	≤0.37	≤0.44	≤0.60
	600±25℃	≤0.22	≤0.30	≤0.33	≤0.36	≤0.39	≤0.46	≤0.64
Classification Temperature(℃)		≥1080	≥1200	≥1250	≥1300	≥1360	≥1470	≥1570