Chrome Corundum Brick

Classification Temperature: 1700ºC;

Bulk Density: 3.1-3.5g/cm³;

Cold Crushing Strength: 100MPa;

Technical Data of Kerui Chrome Corundum Brick

ItemGGZ-30GGZ-20GGZ-12GGZ-5
Cr2O3, %3020125
Fe2O3, %0.30.30.30.3
Al2O3, %68768085
Apparent Porosity, %18181818
Bulk Density, g/cm33.53.43.23.1
Cold Crushing Strength, MPa100100100100

Chrome Corundum Brick Color Indicates Composition And Process

Chrome corundum bricks contain Cr₂O₃. Their main mineral phase is an Al₂O₃-Cr₂O₃ solid solution.

These bricks appear green initially. This green color comes from chromium oxide in the corundum. After high-temperature firing, a reaction with CO occurs. This reaction changes their appearance to red, sometimes even purplish-red.

The brick’s color depends on the chromium oxide (Cr₂O₃) percentage:

  • 3% Cr₂O₃: Light red;
  • 8% Cr₂O₃: Purplish-red;
  • Over 20% Cr₂O₃: Blackish-red;
  • A higher chromium oxide percentage creates a darker brick color.
Kerui Unsintered Chrome Corundum Bricks
Unsintered Chrome Corundum Bricks
Kerui 3% Chrome Corundum Bricks
3% Chrome Corundum Bricks
Kerui 5% Chrome Corundum Bricks
5% Chrome Corundum Bricks
Kerui 30% Chrome Corundum Bricks
30% Chrome Corundum Bricks

Sizes of Chrome Corundum Brick

Standard Shapes: Standard rectangular bricks (230×114×65mm), thickened bricks, etc.

Shaped Bricks: steel ladle bricks, slide rail refractory bricks, breathable bricks, burner bricks, etc. These are primarily used in special structural parts of equipment such as steel ladles, gasifiers, waste incinerators, and glass furnaces, offering features like abrasion resistance and corrosion resistance.

If you need different types of bricks, you can offer the specifications. We also have technicians who can provide customized services according to your needs.

Customized Sizes of Kerui Chrome Corundum Bricks
Customized Sizes
Customized Sizes of Kerui Chrome Corundum Fire Bricks
Customized Sizes

Features of Chrome Corundum Refractory Bricks

Stable Chemical Capacity

Chrome corundum bricks have great chemical resistance. They can resist acid and alkaline solutions. Besides, the chromic oxide can form a protection film that can avoid slag erosion.

High Refractoriness

Chrome and corundum both have high melting points. So the under load temperature of chrome corundum brick is up to 1700℃. In this situation, chrome corundum bricks can be used in many high-temperature industrial kilns.

Good Thermal Shock Resistance

In the production process, chrome and corundum can form a continuous solid solution. This structure can effectively improve the hardness of bricks. So the hardness of chrome corundum brick is better than corundum brick.

Oxidation Resistance

Chrome corundum refractory brick has good oxidation resistance. It will not oxide with other materials in the high-temperature equipment. In this situation, it belongs to environment-friendly material that can be reused.

30% Chrome Corundum Refractory Bricks from Kerui
30% Chrome Corundum Refractory Bricks for Sale at Kerui Factory

Different Types of Chrome Corundum Refractory Bricks

Brick Type Key Composition Core Properties & Mechanisms Typical Applications
Corundum Brick Al₂O₃ ≥90% – High temp resistance, High strength, Good erosion resistance General linings for high-temperature furnaces (e.g., cracking furnaces, blast furnaces)
Chrome Corundum Brick Al₂O₃ + Cr₂O₃
*(Content typically 5%-30%)*
– Superior slag resistance: Cr₂O₃ forms solid solution with Al₂O₃, blocking slag penetration
– Higher refractoriness
– Sintered vs. Fused: Sintered offers better thermal shock; Fused is denser
Slag-prone environments: waste incinerators, gasifiers, glass furnace regenerators
Zirconia Corundum Brick (AZS) Al₂O₃ + ZrO₂
*(ZrO₂ 33%-45%)*
– Exceptional resistance to molten glass erosion: ZrO₂ is non-wetting to glass melt
– Fused vs. Sintered: Fused is denser; Sintered has better thermal shock resistance
Primary use in glass melting furnaces (e.g., tank walls, throat)
α/β-Alumina Electrofused Brick Predominantly β-Al₂O₃
(Produced by fusion casting)
– Very low apparent porosity, High resistance to gas/alkali vapor attack
– Drawback: Poor high-temperature volume stability
Superstructure in glass furnaces, carbon black reactors—environments with alkali vapors
Corundum Mullite Brick Corundum + Mullite – Excellent thermal shock resistance: Mullite’s low thermal expansion buffers thermal stress
– Well-balanced high-temperature properties
Applications with frequent thermal cycling: ceramic kiln furniture, hot blast stoves
Chrome Zirconia Corundum Brick Al₂O₃ + Cr₂O₃ + ZrO₂ – Combines advantages of Chrome & Zirconia: Slag resistance + glass corrosion resistance & thermal shock improvement
– Enhanced thermal shock resistance
Complex corrosive environments: glass furnace regenerators, demanding waste melting furnaces
High Chrome Brick Very High Cr₂O₃
(Typically >70%, up to >90%)
– Top-tier resistance to acidic slag & iron slag
– Drawbacks: High density, high thermal conductivity, potential Cr⁶⁺ leaching
Extremely severe slag corrosion environments: coal gasifier slag zones, copper smelting furnaces
Lightweight Corundum Brick High Al₂O₃, containing numerous pores – Light weight, Excellent thermal insulation
– Drawback: Low strength and erosion resistance
Insulation layer in industrial furnaces, not in direct contact with melt or gas

Usages of Chrome Corundum Bricks

Compared with corundum brick, chrome corundum brick is used more widely.

  • Glass industry: glass kiln lining, brushed glass flow hole cover brick, and so on.
  • Steel industry: hot blast furnace lining, bottom, throat, ladles, and other equipment.
  • Nonferrous industry: melting furnaces, converters, anode furnaces, etc.
  • Petrochemical industry: thermal reactors, waste incinerators, etc.
Glass Melting Furnaces
Glass Melting Furnaces
nonferrous-production
Nonferrous Kiln
Incinerator
Incinerator

High Quality of Chrome Corundum Bricks

In our factory, we have built quality control laboratories to strictly control product quality. We have passed the inspection of international institutions and got the certificates including ISO, CE, and SGS. Besides, we have professional quality control personnel in every production line.

Get Chrome Corundum Brick from Kerui
Get Different Chrome Corundum Bricks from Kerui

Strength of Kerui

Kerui has a factory to produce refractory materials. In this situation, we can provide a suitable price for chrome corundum brick. Kerui has a lot of export experience. Our refractory products have been exported to many countries including Russia, Jordan, Italy, Vietnam, and so on. Finally, we have technicians to give professional advice to every customer. We also provide construction guidance and turnkey service to customers. The profession of Kerui is worthy of your trust. View more products on Kerui Pinterest.

Kerui Certificates 2024

Please specify your requirement by referring to the following aspects:
  • What kind of refractory products are you planning to have?
  • What product details do you need? For example, size, quantity, using temperature, etc.
  • What industry of solution will meet your demand? (Key point)

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