Lightweight corundum mullite bricks are produced by mixing white corundum, fused mullite, and a loss-on-ignition agent in a specific ratio, followed by molding and high-temperature firing. They have high refractoriness, exceeding 1790 °C. Their refractoriness under load is 1600–1700 °C, and their compressive strength at room temperature is 70–260 MPa. They also offer good thermal shock resistance.
With a high alumina content and an optimized raw material ratio and production process, lightweight corundum mullite bricks provide excellent refractoriness and high compressive strength. Compared with ordinary lightweight high-alumina bricks, they offer better refractoriness, structural stability, and longer service life. Compared with lightweight mullite bricks, they provide higher high-temperature strength and are more suitable for furnace parts that require high structural reliability.
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Brand Project |
Alumina hollow sphere products |
Corundum Mullite, Mullite |
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HXQ-99 |
HXQ-90 |
HXQ-85 |
HXQ-80 |
HX-GM -1.5-2.0 |
HX-GM -1.3 |
HX-M -1.0 |
HX-M -0.9 |
HX-M -0.8 |
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Al2O3 % |
≥98 |
≥90 |
≥85 |
≥80 |
≥80 |
≥63 |
≥60 |
≥60 |
≥55 |
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Bulk density g/cm3 |
1.4～2.0 |
1.4～2.0 |
1.4～2.0 |
1.4～2.0 |
1.5～2.0 |
1.2～1.5 |
1.0L |
0.9L |
0.8L |
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Room temperature compressive strength MPa |
≥8 |
≥10 |
≥10 |
≥10 |
≥12 |
≥7 |
≥4 |
≥4 |
≥3 |
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0.1MPa Load softening start temperature T2 ℃ |
≥1700 |
≥1700 |
≥1680 |
≥1650 |
≥1700 |
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Reheating linear change rate % |
1500℃ ×8h -1.0 |
1450℃ ×8h -1.0 |
1450℃ ×8h -1.0 |
1350℃ ×8h -1.0 |
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Maximum operating temperature ℃ |
1780 |
1750 |
1720 |
1700 |
1680 |
1550 |
1500 |
1450 |
1400 |
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Purpose |
High-temperature insulating heat pipes and working linings suitable for high-temperature kilns and thermal equipment |
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●Lightweight structure based on a corundum–mullite composite refractory system
●A balanced combination of high-temperature strength, thermal insulation performance, and thermal shock resistance
●Helps reduce energy consumption, lighten the furnace load, and extend the service life of the furnace lining
●Provides stable performance in high-temperature furnaces and kilns used in industries such as metallurgy, power generation, and petrochemicals
Please contact Shandong Haixin Refractory Materials Co., Ltd. to request technical specifications, samples, and customized furnace lining solutions for lightweight corundum mullite bricks.
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