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BAUXITE
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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