Brown fused alumina

Brown fused alumina is an abrasive composed mainly of aluminium oxide and is almost iron-free. Brown fused alumina produced while fusing calcined bauxite at higher than 2000 °C temperature in an electric arc furnace. Brown fused alumina abrasive is durable and extremely hard material (9 in Mohs scale), angular shape with renewing edges. This abrasive is also ecologically clean and free of not respirable crystalline silica (SiO2). It has relatively high thermal conductivity and low thermal expansion.

 

Application:

 

· Brown fused alumina is used to anchor pattern creation prior to coating or bonding, rust, scale removal, sweeping, matte surface finish of steel, stainless steel, aluminium, non-ferrous metals, glass, stone and other surfaces.

· It is widely used in the production of various abrasive tools (abrasive paper, grinding discs, etc.).

· As an additive for wear-resistant floorings.

· Fire safety applications and ceramics.

 

Advantages


· Not affecting the color of the processing cases.

· Sandblasting in the non-iron process.

· High speed processing.

· Very low amount of iron oxide, suitable for blasting operations of non-ferrous metals.

 

Physical properties:

 

Hardness: 9 Mohs

Specific gravity: ≥ 3,9-4,1 g/cm³

Total density: 1,5 – 2,1 kg/dm³

Shape: angular

Storage conditions: dry and covered

Packing: 25 kg bags, 1 ton per pallet

 

Chemical composition:

 

Standard quality:

Al2O3: 89-90 %

TiO2: 3,2-3,5 %

SiO2: 3,0-3,9 %

Fe2O3: 3,2-3,5 %

 

Premium quality:

Al2O3: > 95 %,

TiO2: < 3,00 %

SiO2: < 1,80 %

Fe2O3: < 0,15 %

 

Brown fused alumina sizes:

 

F 8      2800 – 2000 µm

F 10    2360 – 1700 µm

F 12    2000 – 1400 µm

F 14    1700 – 1180 µm

F 16    1400 – 1000 µm

F 20    1180 – 850 µm

F 22    1000 – 710 µm

F 24    850 – 600 µm

F 30    710 – 500 µm

F 36    600 – 425 µm

F 40    500 – 355 µm

F 46    425 – 300 µm

F 54    355 – 250 µm

F 60    300 – 212 µm

F 70    250 – 180 µm

F 80    212 – 150 µm

F 90    180 – 125 µm

F 100  150 – 106 µm

F 120  125 – 90 µm

F 150  106 – 63 µm

F 180  90 – 53 µm

F 220  75 – 45 µm

© 2019