Aluminium granules are fine spherical aggregates of

aluminium Aluminium (aluminum in American and Canadian English) is a chemical element with the symbol Al and atomic number 13. Aluminium has a density lower than those of other common metals, at approximately one third that of steel. I ...

Manufacture

Aluminium granules are manufactured by the melting of primary or secondary aluminium and blown in air or vacuum, or are

cast Cast may refer to: Music * Cast (band), an English alternative rock band * Cast (Mexican band), a progressive Mexican rock band * The Cast, a Scottish musical duo: Mairi Campbell and Dave Francis * ''Cast'', a 2012 album by Trespassers William ...

in sand and then

sieve A sieve, fine mesh strainer, or sift, is a device for separating wanted elements from unwanted material or for controlling the particle size distribution of a sample, using a screen such as a woven mesh or net or perforated sheet materia ...

d off. Other methods include casting of molten aluminium in water.

Granules versus powders

Aluminium granules have been found safer and economical compared to atomized

aluminium powder Aluminium powder is powdered aluminium. This was originally produced by mechanical means using a stamp mill to create flakes. Subsequently, a process of spraying molten aluminium to create a powder of droplets was developed by E. J. Hall in the ...

. Aluminium granules have lower explosion risk in production and in use of the product itself.

Advantages

The

density Density (volumetric mass density or specific mass) is the substance's mass per unit of volume. The symbol most often used for density is ''ρ'' (the lower case Greek letter rho), although the Latin letter ''D'' can also be used. Mathematical ...

of aluminium granules ranges from 1.0 to 1.8 g/cm³ and is much higher compared to aluminium powder.

References

{{aluminium alloys Aluminium alloys Deoxidizers

Manufacture

Granules versus powders

Advantages

See also

References