White fused alumina for refractories 3-5mm

White fused alumina for refractories 3-5mm refers to white fused alumina grain with a particle size range of 3mm-5mm. Large blocks of white fused alumina produced by the smelting workshop are transported to the section sand production workshop, broken by the coarse crusher, and then screened; finally, White Fused Alumina products with particle sizes within a range of 3-5mm. White Fused Alumina is a hard, dense, fire-proof, sharp-edged, wear-resistant, and corrosion-resistant material. White Fused Alumina for Refractory is a mineral for shaped and unshaped refractory products in fire-proof, precision casting, foundry and coating industries. It is the primary raw material for shaped refractory, unshaped refractory, and other applications.

Introduce of white fused alumina for refractories 3-5mm:

White fused alumina from fusing industrial alumina in an electric arc furnace under carefully controlled conditions at high temperatures. The dense mineral is white and has predominantly large crystals of Alpha Alumina. White fused alumina (WFA or WA) is an important raw material for advanced refractories and abrasives, a widely used raw material in refractories, ceramics shapes, grinding wheels, sandpaper, blasting media, metal preparation, laminates, coatings, lapping, polishing, grinding, and hundreds of other applications. It is a very pure, low iron alumina; specific refractory applications include high tech refractory castables, isostatic pressed refractories, and pre-cast refractory shapes. The benefits of white fused alumina in these applications are high alumina content, low impurities, and stability at high temperatures.

Chemical composite and physical properties of white fused alumina for refractories 3-5mm:

Items Grain
Al2O3 99.3%min
SiO2 0.10%max
Fe2O3 0.10%max
Na2O 0.30%max
Melting point(℃) 2250
Real density(g/cm3) 3.90min
Refractoriness (℃) ≥1900
Color White
Size 3mm-5mm

Product features of white fused alumina for refractories 3-5mm:

  • High hardness: Mohs hardness is 9.0, and Vickers hardness(HV) is 2000-2200.
  • Good toughness: For example, the compressive strength of white fused alumina F120 is 100KN/cm2.
  • High density: The volume density of WFA is 3.6g/cm3.
  • High-temperature resistance with low thermal conductivity and low coefficient of linear expansion. So it can resist thermal shock.
  • PH value: White fused alumina is a neutral substance with a PH value of 7.0-8.0.
  • High resistance to chemical corrosion. White fused alumina is resistant to most acid and alkali materials.

Applications of white fused alumina for refractories 3-5mm:

  • Refractory aggregate for ladle in the steel-making industry.
  • Kiln construction.
  • Furnace building.
  • Refractory bricks.
  • Ceramic Tiles special ceramics.
  • Technical ceramics.

White Fused Alumina(FAQ)

Amount of abrasive applied:

This decision is made by knowing the type of material you will be working with. Open Coat – Here, the abrasive granules cover from 50% – 70% of the backing and are set at pre-determined spacing to reduce loading. Used on softer surface materials that tends to load or fill

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 does the form factor (grain shape) indicate?

The description of the grain shape can range from “angular” to “acicular” to “spherical”. When the value of the dimensionless form factor is 1, the grain is spherical. The smaller the form factor, the pointier the grain.

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