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20mm High-Alumina Brick

Size: 230*115*20mm

Working Temperature °C: 1735

Application: masonry blast furnace,hot stove,electric furnace top,blast furnace,reverberatory furnace,rotary kiln lining.

Description

Refractoriness: 20mm high-alumina brick Refractoriness is higher than Clay brick and semi-silica brick,reaching 1750~1790℃,it’s the advanced refractory materials.

Refractoriness under load: The high alumina products is in the high Al2O3, less impurities, the formation of fusible glass less, so the load softening temperature than the clay brick, but the mullite crystallization doesn’t form a network organizations, therefore refractoriness under load is lower than silica bricks.

Slag resistance: 20mm high-alumina brick maintains more of A1203,closes to the Neutral refractories,it can resist the erosion of acidic slag and alkaline slag,since there are SiO2,so the ability to resist alkaline slag is weaker than that of acid-resistant slag.

Application

  1. masonry blast furnace
  2. hot stove
  3. electric furnace top
  4. blast furnace
  5. reverberatory furnace
  6. rotary kiln lining.

Performance parameters:

 

Name Level 1 Level 2 Level 3 Superior
high  alumina brick high  alumina brick high  alumina brick high  alumina brick
Items NO. LZ-75 LZ-65 LZ-55 LZ-80
A1203%≥ 75 65 55 82
Fe203% 2.5 2.5 2.6 2
Bulk density g/cm2 2.5 2.4 2.3 2.6
cold crushing strength MPa 70 60 50 80
refractoriness under load   1510 1460 1420 1550
Refractoriness   1790 1770 1770 1790
Apparent porosity % 22 23 24 21
modulus of rupture % -0.3 -0.4 -0.4 -0.2

In addition, 20mm high-alumina brick is also widely used to do flat furnace regenerative lattice brick, pouring system with the plug head, water tank and so on. But the 20mm high alumina brick price is higher than clay brick, so clay brick can meet the requirements of the place do not have to use high alumina brick.

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