Dense fused alumina for refractories 1-3mm 3-5mm 5-8mm

Dense alumina for refractories also called dense fused alumina for refractories, is a high-end refractory material made from the reduced fusion of high purity industry alumina powder and reducing agent in an electric arc furnace. Its main content is α-aluminum-oxide(α-Al2O3) and looks dark gray or light gray. The fused alumina through cooled down, crushed, and graded into grits/grains suitable for refractory applications. Its Al2O3 content is over 98%; the porosity rate is less than 4%. It is acid and alkali-resistant, slag-resistant, abrasion-resistant, anti-heat shock, and has stable chemical content. Dense fused alumina is widely used in the steelmaking industry, metallurgical, ceramic, glass, construction materials, shaped refractory and unshaped refractory; the available size is 0-1mm, 1-3mm, 3-5mm, 5-8mm.

Dense fused alumina is a high-grade refractory material with a main crystal phase of more than 98% and porosity of less than 4%; it has the advantages of good acid and alkali resistance, and good wear resistance under high temperature, corrosion resistance, and volume stability. It is widely used in metallurgical, petrochemical, building materials, ceramic, and other industries.

Application of dense fused alumina for refractories 1-3mm, 3-5mm, 5-8mm:

  1. Blast furnace runner castable
  2. Ladle castable
  3. Ramming materials, prefabricated parts, and other amorphous refractory materials
  4. Refractory brick, permeable transfer, nozzle seat brick, and other qualitative refractory materials
  5. Refractory materials for ceramics, cement, glass, and other industries

Physical properties of dense fused alumina for refractories 1-3mm, 3-5mm, 5-8mm:

Item Index
Color Grayish-White
Crystal form α-Al2O3
Hardness (Mohs) ≥9.0
Melting Point (℃) 2250
Maximum Working Temperature(℃) 1900
True Density(g/cm3) ≥3. 90
Linear Thermal Expansion(0—1600℃) 7—9
Apparent Porosity (%) ≤2
Bulk density (g/cm3) ≥3.9

Chemical compositions of dense fused alumina for refractories 1-3mm, 3-5mm, 5-8mm:

Chemical Compositions Refractories Typical Value
Al2O (%) ≥ 99.2 99.6
SiO2 (%) ≤ 0.5 0.4
Fe2O3 (%) ≤ 0.1 0.03
TiO2 (%) ≤ 0.1 0.05
CaO (%) ≤ 0.1 0.05
MgO (%) ≤ 0.1 0.05
Na2O (%) ≤ 0.1 0.05
C (%) ≤ 0.1 0.08

Dense Fused Alumina(FAQ)

What is porosity?

Porosity is defined as the gas proportion (cavity volume) of a particle’s total volume. It can be determined using different measurement techniques, such as gas adsorption and mercury porosimetry. With the same grain size and shape, a lower bulk density corresponds to a higher porosity of the grains.

What is the best way to store my abrasives?

The best way to have abrasive products retain maximum performance and work life is to store them properly. The bonding and backing materials used in abrasives are very sensitive to changes in temperature and humidity. Abrasives are best stored at temperature levels of 60 to 80 degrees Farenheit and a

What is fepa and what does it do?

FEPA is the Federation of European Producers of Abrasives. Its mission is to develop and publish standards, documents and comprehensive safety instructions for the abrasive industry. Abrasive grain sizes are produced and sold according to the FEPA standard, among other things. This is to ensure that a consistent quality for

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