High Temperature Resistance Alumina Fire Brick

Introduction to alumina fire brick

Alumina fire brick is a kind of refractory material. It is an aluminum silicate refractory product with aluminum oxide (Al2O3) content higher than 48%. The main component of this refractory brick is AL2O3.. It is formed and calcined from alumina or other raw materials with high alumina content. High thermal stability, refractoriness above 1770℃. It has good slag resistance and is used for lining steel-making electric furnaces, glass melting furnaces, cement rotary furnaces, etc.
Product performance of alumina fire brick

1. Refractoriness of alumina fire brick

The refractoriness of alumina fire brick is higher than that of clay bricks and semi-silica bricks, at 1750~1790℃, which belong to advanced refractory materials.

2. Load softening temperature of alumina fire brick

Because high-alumina products have high Al2O3, less impurities, and less fusible glass bodies, the load softening temperature is higher than that of clay bricks. alumina fire brick, but because mullite crystals do not form a network structure, there is still no silicon at the load softening temperature. Brick high.

3. Slag resistance of alumina fire brick

alumina fire brick contain more Al2O3, which is close to neutral refractory materials, and can resist the erosion of acidic slag and alkaline slag. Because of the inclusion of SiO2, the ability to resist alkaline slag is weaker than that of acidic slag.

Classification of alumina fire brick

1. Classified by Al2O3 content in alumina fire brick

Classâ… : Al2O3 content>75%

Classâ…¡: Al2O3 content is 60~75%

Classâ…¢: Al2O3 content is 48-60%.

If Al2O3 content is higher than 80%, it is called super alumina fire brick

If Al2O3 content is higher than 90%, it is called corundum brick.

2. Classification of alumina fire brick by firing process

It can be divided into fired alumina fire brick and unfired alumina fire brick. The firing temperature of the first and second grade alumina fire brick is 1500℃-1600℃ and 1450℃-1500℃ respectively, while the third grade is lower. High-alumina non-sintered bricks mainly refer to phosphate high-alumina.

3. Classification of alumina fire brick by mineral composition

It can be divided into five types: low mullite, mullite, mullite, corundum, corundum and corundum;

4. Classification of alumina fire brick according to different shapes

It can be divided into standard alumina fire brick, special-shaped alumina fire brick and special alumina fire brick;

5. Classification of alumina fire brick according to their properties

It can be divided into ordinary alumina fire brick and special alumina fire brick (thermal shock resistance, low creep, anti-stripping alumina fire brick;

6. Classification of alumina fire brick by use

It can be divided into high-aluminum and high-alumina bricks, hot-blast stove high-alumina bricks, steel-making electric furnace top high-alumina bricks, Shenggang barrel high-alumina bricks, and inner cast high-alumina bricks.

Technical Data Sheet

Technical Data Sheet of alumina fire brick

Grade

SK-32

SK-34

SK-36

SK-38

SK-40

Al2O3 % ≥

48

55

65

75

80

Fe2O3 % ≤

2.5

2.0

1.8

1.6

1.5

Refractoriness (℃) ≥

1770

1770

1770

1790

1790

Apparent Porosity % ≤

24

23

23

22

21

Bulk Density (g/cm3) ≥

2.15-2.25

2.25-2.35

2.35-2.45

2.45-2.65

2.65-2.75

Cold Crushing Strength (Mpa) ≥

35

40

45

55

60

Refractoriness Under Load 0.2Mpa (℃) ≥

1300

1350

1400

1490

1530

Permanent Linear Change %

1300℃×2h

1350℃×2h

1400℃×2h

1500℃×2h

1550℃×2h

+0.1~-0.4

+0.1~-0.4

+0.1~-0.4

+0.1~-0.4

+0.1~-0.4

Application of alumina fire brick

alumina fire brick are mainly used to build blast furnaces, hot blast stoves, electric furnace tops, blast furnaces, reverberatory furnaces, rotary kiln linings, cement rotary kiln transition zones, preheaters and other thermal equipment requiring heat shock resistance; in addition, alumina fire brick are also widely used as open hearth regenerative checker bricks, plugs for pouring systems, nozzle bricks, etc.
Delivery

Package Informations:

1. Packed in a 100cm*100cm fumigated wooden pallet with a waterproof plastic film cover, and tightened with plastic bandages.

2. We can also pack the goods according to your requirements.

Shipping

1. FEDEX/DHL/UPS/TNT for samples.

2. By Sea for batch goods.

3. Customers specifying freight forwarders or negotiable shipping methods!

4. Delivery Time:3 days for common shape samples;15 days for special shape samples.Within 30 days for batch goods.
FAQ:

Q: What's the MOQ?

A: No limitation.

Q: What's your payment terms?

A:Negotiation

A: For every production processing,we have complete QC system for the chemical composition and Physical properties.After production,all the goods will be tested ,and the quality certificate will be shipped along with goods.

Q: Does your FOSHAN HUANYA Refractory Material Co., Ltd. supply samples?

A: Yes, we can supply samples for free, and the freight will be undertaken by clients.

Contact us:

Martin

Tel:8617328087470

Email: Martin@huanya-refractory.com

www.huanya-refractory.com

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