Description

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Corundum bricks are manufactured using high-purity raw materials such as fused alumina and corundum. The production process involves high-temperature firing to form a dense, stable structure. These bricks exhibit a high normal temperature compressive strength of up to 340 MPa and a load softening start temperature greater than 1700°C. They also possess excellent resistance to acidic and alkaline slags, as well as metal and glass liquids.

Product Parameters

Brand Properties		C-98	C-95	C-90	C-85
Chemical Composition (%)	Al₂O₃%	98.5	95	90	85
	SiO₂%	0.3	3.0	9.0	18
	Fe₂O₃%	0.2	0.2	0.5	0.5
Apparent Porosity (%)		18	18	18	20
Bulk Density (g/cm³)		3.1	2.95	2.9	2.75
Cold Crushing Strength (MPa)		90	80	80	70
@0.2MPa Refractoriness Under Load (℃)		1700	1650	1650	1700
@1,600℃x3hrs Permanent Linear Change (%)		0.1	0.2	0.2	0.3
Main Applications		Carbon Reactor Furnace Pertrochemical Furnace Industry Ceramic Kiln Refractory Tunnel Kiln Various High-temp Furnace

Product Usage:

Corundum bricks serve as mission-critical linings across multiple industries where standard refractories fail prematurely. In petrochemical processing, they form the primary lining of ethylene cracking furnaces, reformer tubes, and carbon black reactors, where their resistance to hydrocarbon atmospheres and thermal cycling outperforms traditional materials by 300-400%. The ceramic and glass industries utilize these bricks in kiln car tops, glass tank superstructures, and sagger furnaces, benefiting from their non-contaminating properties and ability to maintain dimensional accuracy through thousands of heating cycles.
Metallurgical applications include:
Aluminum electrolytic cell linings (resistant to cryolite attack)
Copper anode furnace hearths (withstands FeO-SiO₂ slags)
Steel ladle impact pads (handles 1650°C molten steel)
Emerging high-tech uses demonstrate their versatility:
Solar silicon crystal growth crucibles
LED sapphire production furnaces
Nuclear fuel pellet sintering kilns

Product Advantages

Extreme Abrasion Resistance

(Mohs hardness 9.0): Ideal for high-velocity gas/solid particle environments

Chemical Inertness

Resists acids, alkalis, and molten metals (except ferrous alloys)

High Cold Crushing Strength

Maintains structural integrity under heavy loads

Low Creep Rate

<0.5% deformation at 1500°C/100h): Prevents furnace distortion

Excellent Volume Stability

Permanent linear change <0.3% at 1600°C

High Bulk Density:

The dense structure of corundum refractory bricks enhances their resistance to wear and erosion

Product technology:

The production of corundum Bricks involves advanced technology and precision engineering:

corundum brick production process

Key steps include:

Raw Material Selection:
Fused white alumina (99.5% Al₂O₃) for high-purity grades
Tabular alumina for standard grades
Microsilica/Zirconia additives for specialized formulations

Particle Engineering:
Multi-stage crushing and screening to achieve ideal particle size distribution
60:40 coarse-to-fine ratio for optimal packing density

Binder System:
Phosphoric acid/aluminum phosphate for temporary bonding
Nanoscale alumina sintering aids for enhanced densification

Forming Technology:
Isostatic pressing (200-300 MPa) for complex shapes
Hydraulic pressing for standard bricks

High-Temperature Firing:
Tunnel kiln firing at 1750-1850°C for 48-72 hours
Precisely controlled atmosphere (oxidizing/reducing as required)

Why Choose Us?

23+

years experience focus on refractories field

2 plants

with 3 sets of tunnel kilns for 120,000 tonnes capacity

3 QC

Labs Technology Centres

120+ employees

with ISO9001,TUV,SGS,Intertek certifications

100+

abroad customers in 50+ countries

20+

major industry furnace projects yearly

Packing

Corundum bricks are typically packaged in wooden crates or pallets to ensure safe transportation and storage. Each brick is carefully wrapped to prevent damage during transit. The packaging is designed to protect the bricks from moisture and physical impact, maintaining their integrity until they reach the end-user. Proper packaging also facilitates easy handling and storage on construction sites or in industrial facilities

corundum brick packing

FAQ

Q: What is the primary advantage of using corundum bricks over other refractory materials?

A: Corundum firebricks offer superior resistance to thermal shock and chemical attack. Their high density and low porosity make them ideal for applications where other materials may fail

Q: How do corundum fire bricks contribute to energy efficiency in industrial processes?

A: The low porosity of corundum refractory bricks reduces heat loss, improving thermal efficiency. This can lead to significant energy savings and reduced operational costs

Q:Can corundum refractories bricks be customized for specific applications?

A: Yes, our company offers customization options to meet the unique requirements of different industrial applications. We can adjust the chemical composition and physical properties of the bricks to optimize their performance

Q: What is the maximum recommended heating rate?

A: For large installations, we recommend 20-30°C/hour to 600°C, then 50-100°C/hour to operating temperature to prevent thermal stress.

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