CALCINED ALUMINA

CALCINED ALUMINA

Calcined alumina for refractories, ceramics and surface treatment.

Combined with state of the art process control equipment we are able to produce a range of high alpha alumina grades with controlled soda chemistry, surface area and partied size distributions.

We provide alumina products are used in a wide grange of refractory applications, such as: fired shapes, monolithics and pre-case shapes used in foundry, iron and steel making applications.

Ceramic grades are used in the manufacture of grinding media, glazes, technical and advanced ceramics.

Alpha alumina is also used in surface treatment applications, careful control of physical properties allow its as a metal polish and buffer in addition to surface that require a specific finish.

Calcined alumina for refractories

There are two kinds: Coarse powder and Fine powder

Specs

Type Al2O3﹪ Na2O﹪ SiO2﹪ Fe2O3﹪ Ture Density g/cm3 α–Al2O3﹪ Primary crystal size

#956;m

NX—1 99.7 0.1 0.05 0.03 3.95 95 1

NX—2 99.5 0.15 0.08 0.03 3.94 95 1-2

NX—3 99.0 0.20 0.15 0.04 3.93 94 2-3

Coarse powder

Fine powder sizes

Siz 325 mesh 500mesh 800mesh 5µm 3µm 2µm 1µm

NX—1 ● ● ● ● ● ● &#9679

NX—2 ● ● ● ● ● &#9679

NX—3 ● ● ● ● &#9679

Calcined alumina for ceramics

Specs

Type Al2O3﹪ Na2O﹪ SiO2﹪ Fe2O3﹪ LOI﹪ Ture Density g/cm3 α–Al2O3﹪ Primary crystal size μm

NX—1 99.7 0.03 0.04 0.02 0.1 3.97 96 3~5

NX—2 99.7 0.08 0.05 0.03 0.1 3.96 95 2~4

NX—3 99.7 0.05 0.04 0.02 0.1 3.96 96 2~3

NX—2 99.7 0.08 0.05 0.03 0.15 3.94 95 ＜1

NX—3 99.8 0.05 0.04 0.02 0.1 3.95 96 1~2

#9679; We also could produce the specs based on the customer’s request.