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#1 Posted : Thursday, December 07, 2023 7:07:03 PM(UTC)

Rank: Advanced Member

Groups: Registered
Joined: 10/20/2021(UTC)
Posts: 212

Product Introduction:

75 high alumina brick is a neutral refractory with no less than 75 percent of alumina trioxide (Al2O3) content.High aluminum brick refractory, long service life, high slag resistance of good use quality characteristics, but high aluminum brick is also divided into grades and quality, so when we buy we also need to distinguish the following high aluminum brick grade quality points, generally divided into: super - AL2O3 content > 80 percent;First class - AL2O3 content > % 75;The content of second-class -- AL2O3 was 60 ~ 75 percent;The content of third grade - AL2O3 is 48 % ~ 60 %.Four levels.

75 high alumina brick is formed and calcined from bauxite or other raw materials with high alumina content.With high thermal stability, the Refractoriness is above 1790℃, and the medium contentment Under Load is 1520°, which is also a senior refractories.

75 High alumina brick (1)

75 high alumina brick Product Superiority:

1. High compressive strength, high fire resistance.

2. Good impact resistance, strong corrosion resistance, excellent slag resistance, long service life.

3. Due to the high content of trialumina (Al2O3), the load temperature is high, and the structural strength is high at high temperature.

Application Field:

75 high alumina brick is mainly used for lining of blast furnace, hot blast furnace, top of electric furnace, blast furnace, reflection furnace and rotary kiln.In addition, it is also widely used in lattice brick of open hearth regenerator, plug head of gating system and nozzle brick, etc.

75 High alumina brick (2)

75 high aluminum brick features are:

A. Fire-resistance

The refractory degree of high aluminum brick is higher than that of clay brick and semi-silicon brick, up to 1750~1790℃, which belongs to senior refractory materials.

B. softening temperature under load

Because of the high Al2O3 in high aluminum products, less miscellany mass, the formation of fusible vitreous less, so the load softening temperature is higher than clay brick, but because mullite crystallization did not form a network organization, so the load softening temperature is still not high as silicon brick.

C. Slag resistance

High aluminum brick Al2O3 more, close to the neutral refractory material, can resist the erosion of acid slag and alkaline slag, because it contains SiO2, so the ability to resist alkaline slag than acid slag ability is weak.

High Alumina Refractory Brick Physical and Chemical Index:








Al2O3 (%)






Refractoriness (°C )






Bulk density (g/cm3)






Softening temperature under load (°C )






Reheating Linear changes Rate (%)













Apparent porosity (%)






Cold crushing strength (Mpa)







Steel furnace, glass furnace, sodium silicate furnace, ceramic shuttle kiln, cement rotary kiln, blast furnace, electric furnace, blast furnace, aluminium furnace and reverberatory furnace.

75 High alumina brick (3)


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.


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.

75 High alumina brick (4)


Q1: Are you a factory or a trading company?

A: We are a self-run factory.

Q2: location?How can I travel there?

A: Our factory is located in Nanhai, Foshan, Guangdong, China.

Q3: The nearest airports are Foshan Shatie Airport and Guangzhou Baiyun Airport.

In the third quarter.What is the delivery time of the new mold and mass production?

A : *7-10 days to make the new mold.

* Batch production takes 20-25 days for 20GP and 25-30 days for 40HQ.

Q4: The fourth quarter.What certificates do you have?

A: We have passed the MA, AL, ilac-MRA, CNAS certification. The factory is reliable and the quality is guaranteed.

Q5: Payment terms?

A: T/T (T/T) and L/C (L/C).

Q6: Can you send the sample to me?

A: Yes, samples are free and you are responsible for the freight. http://www.huanya-refractory.com
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