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BAUXITE

Bauxite ore is the world’s primary source of aluminium. The ore must first be chemically processed to produce alumina (aluminium oxide).

Calcined Bauxite is obtained by calcining (heating) superior grade Bauxite at high temperatures that ranges from 850 °C to 1600 °C. This process removes moisture, hence increasing the alumina content.Raw bauxite has an alumina content of 57-58% while calcined bauxite has an alumina content of 80-88%.Calcined Bauxite is used as a raw material for manufacturing fused alumina and high alumina refractories and has the following properties

low impurities,

high bulk density

tough and hard grains

Consistent and homogenized texture

The specifications of the various types of calcined bauxite that we can offer are shown in the table.

Specifications Calcined Bauxite 1 Calcined Bauxite 2 Calcined Bauxite 3 Calcined Bauxite 4
Al2O3 min 85-86% 81-82% 83 - 84% 79 -80%
Fe2O3 max 2.8% 2.6-2.70% 3.70-4.20% 4.50 - 5.00%
CaO max 2.00% 1.5% 2.50% 2.50 - 2.80%
SiO2 max 5 - 6% 10-12% 5.50 - 6.50% 8.00-12.00%
TiO2 max 4 - 5% 4 - 4.5% 4 - 5% 4 - 5%
LOI max 0.5 0.5 0.5 0.5
B D (gm/cc) 3.15~3.20min 3.15 Min 83 - 84% 3.20 Min.

Chamotte is formed by the high temperature firing of refractory clay and has the following uses.

production of refractory bricks, blocks and tiles

production of castables

production of foundry moulds

production of sanitary ceramics

addition to ceramics mixtures

production of electroporcelain and porcelain

finely milled for the production of glazes

The specifications of the various types of chamotte that we can offer are shown in the table below.

Parameters Chamotte 1 Chamotte 2 Chamotte 3
Al2O3 min 40-42 % 45.00-46.00% 54 – 56 %
Fe2O3 max 0.80-1.00% 1.20% 1.50%
CaO max 0.50% 1 .00 % 1.20%
SiO2 max 53-56 % 42.00-48.00% 38 – 40 %
TiO2 max 2.00% 4.50% 3.50%
LOI max 0.50% 0.50% 0.50%
B D (gm/cc) 2.45-2.50% 2.40-2.50% 2.50-2.60%

Calcined Bauxite is obtained by calcining (heating) superior grade Bauxite at high temperatures that ranges from 850 °C to 1600 °C. This process removes moisture, hence increasing the alumina content.Raw bauxite has an alumina content of 57-58% while calcined bauxite has an alumina content of 80-88%.Calcined Bauxite is used as a raw material for manufacturing fused alumina and high alumina refractories and has the following properties

low impurities,

high bulk density

tough and hard grains

Consistent and homogenized texture

The specifications of the various types of calcined bauxite that we can offer are shown in the table below.

White fused alumina is a synthetic product that is created by melting pure grade calcined alumina in electric arc furnaces. The specification is shown below.

Al2O3 99.00% Min
SiO2 0.15% Max
Fe2O3 0.10% Max
CaO 0.10% Max
Na2O 99.00% Min
TiO2 Traces
Specific Gravity 3.8-3.9
Available Size (0 – 1) mm, (1 - 3) mm, (3 – 5) mm, (5 – 8) mm, (6 - 10) mesh, (10 – 16) mesh, (16 – 30) mesh, (30 – 60) mesh, (60 – 90) mesh, (90 – 140) mesh, 100F, 200F, -325 UF, -325 Spl.

Calcined Bauxite is obtained by calcining (heating) superior grade Bauxite at high temperatures that ranges from 850 °C to 1600 °C. This process removes moisture, hence increasing the alumina content.Raw bauxite has an alumina content of 57-58% while calcined bauxite has an alumina content of 80-88%.Calcined Bauxite is used as a raw material for manufacturing fused alumina and high alumina refractories and has the following properties

low impurities,

high bulk density

tough and hard grains

Consistent and homogenized texture

The specifications of the various types of calcined bauxite that we can offer are shown in the table below.

White fused mullite is produced by fusing high purity alumina and silica together in an electric arc furnace. It contains low impurities and is very stable even at high temperatures. It has a low coefficient of thermal expansion which results in a product with excellent thermal shock resistance and resistance to deformation under load. It can be used in the following industries.

Refinery & petrochemicals

Glass

Refractory

The specification of white fused mullite is shown in the table below.

WFA Mullite Grains
Al2O3 73.00 - 77.00%
SiO2 22.00-27.00%
Fe2O3 0.30-1.00% Max
TiO2 0.50% Max
Specific Gravity 2.90-3.15
Available Size (0 -1) mm , (1 -3) mm, (8 - 10) mesh, (10 - 36) mesh, 40F, 80F, -200 mesh

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