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Alumina bubble brick for Industrial Furnaces

Our alumina bubble brick is a premium lightweight refractory material with high alumina content. It features excellent thermal insulation, low bulk density, and strong high-temperature stability (up to 1800°C). Ideal for lining industrial furnaces, kilns, and thermal equipment, it reduces energy consumption and extends furnace service life. Compliant with industrial standards, it’s a reliable choice for metallurgy, ceramics, and petrochemical industries.

Item: Alumina Bubble Brick
Fe₂O₃ %: ≤0.20
Bulk Density: 1.4-1.7 g/cm³

product details

Core Advantages

Superior Thermal Insulation Performance

The unique hollow sphere structure minimizes thermal conductivity, effectively reducing heat loss in high-temperature equipment. Compared to traditional refractory bricks, cutting operational costs significantly.

Lightweight & High Strength

With low bulk density (1.4-1.7g/cm³), it eases equipment load and simplifies installation. Meanwhile, high alumina purity ensures excellent mechanical strength and wear resistance, avoiding cracking under extreme temperature changes.

Exceptional High-Temp Stability

Made of high-purity alumina (Al₂O₃ ≥90%), it can withstand continuous temperatures up to 1800°C and resist corrosion from molten metal, slag, and chemical media, extending the service life of furnace linings.

Product Parameters

Item	Alumina Bubble Brick
Al₂O₃ %	≥85	≥90	≥99
Fe₂O₃ %	≤0.20	≤0.20	≤0.20
Bulk Densit (g/cm³)	1.4-1.7	1.4-1.7	1.4-1.7
Cold Crushing Strength (MPa)	≥12	≥10	≥9
（0.2MPa,0.6%） Refractoriness Under Load (℃)	≥1650	≥1700	≥1700
Permanent Linear Change 1600℃ x 3h	±0.3	±0.3	±0.3
coefficient of thermal expansion (room temperature -1300℃)	~7.8	~0.8	~8.6
Thermal conductivity	≤0.80	≤1.30	≤1.50

Detailed Application Scenarios

1. Metallurgical Industry

◎ Widely used in lining of blast furnace hot blast stoves, electric arc furnaces, and ladle tundishes. It resists high-temperature erosion from molten steel and slag, improves thermal insulation effect, and ensures stable production of metallurgical equipment.

2. Ceramic & Glass Industry

◎ Suitable for kiln linings in ceramic tile, sanitary ware, and glass melting furnaces. Its excellent thermal insulation reduces heat loss during firing, maintains uniform furnace temperature, and enhances product quality while saving energy.

3. Petrochemical Industry

◎ Applied in linings of catalytic cracking units, reforming furnaces, and hydrogenation reactors. It withstands high temperatures and chemical corrosion, ensures safe operation of equipment, and extends maintenance cycles.

4. Other High-Temp Equipment

◎ Also used in waste incinerators, industrial boilers, and solar thermal power generation equipment. It adapts to complex high-temperature environments, improves equipment efficiency, and reduces environmental pollution.