Aluminum oxide coffee color BFA F120 F150 MESH

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Brown electrocorundum is a type of corundum that combines grinding efficiency and cost. It is produced by high-temperature smelting of bauxite. Then it is crushed, magnetically separated to remove iron, and sieved into various particle sizes. Brown corundum has dense texture, high hardness, good toughness, and high refractory temperature.
There are various types of brown corundum. According to the different alumina content, it is divided into primary brown alumina, secondary brown alumina, and tertiary brown alumina. According to different smelting methods, it is divided into fixed furnace brown corundum and dump furnace brown corundum, with dump furnace brown corundum having higher purity. According to different crushing processes and particle shapes, it can be divided into brown corundum roller sand and brown corundum marker sand, with marker sand and brown corundum having a higher stacking density. According to the different particle size distribution, it can be divided into brown corundum F sand and brown corundum P sand. F sand is suitable for producing consolidated abrasives and sandblasting, while P sand is suitable for producing coated abrasives.
For applications with high quality requirements, such as special sandblasting and abrasive products, Tipping Furnace Bamak Brown Corundum has more advantages:
Chemical composition. Dumping furnace brown corundum has an alumina content of no less than 95% and a silicon content of less than 0.1%. Dumping furnace brown corundum with low silicon and high titanium is more suitable for producing ceramic grinding wheels and products.
The brown fused alumina particles produced by the Bamak crushing process are round and have a bulk density greater than that of a jaw crusher.
The proportion of brown fused alumina（Brown electrocorundum） crystal aggregates in the dumping furnace is high, and the crystal size is smaller than that in the fixed furnace. It has strong resistance to crushing and good toughness, and is used in abrasive products.
Dumping furnace brown aluminum oxide is used for sandblasting and grinding, with higher durability than fixed furnaces.
chemical composition
Type granularity
Al2O3
SiO2
Fe2O3
TiO2
Fixed furnace
F16
95-96
≤ 1.2
≤ 3.0
F20
95-96
≤ 1.2
≤ 0.3
F24
95-96
≤ 1.2
≤ 0.3
F36
95-96
≤ 1.2
≤ 0.3
F60
94-95.5
≤ 1.2
≤ 0.3
F80
94-95.5
≤ 1.2
≤ 0.3
F220
93-95
≤ 1.4
≤ 3.0
Tipping furnace
F16
≤ 1
≤ 0.25
F20
≤ 1
≤ 0.25
F24
≤ 1
≤ 0.25
F36
≤ 1
≤ 0.25
F60
95-96.5
≤ 1
≤ 0.25
F80
95-96.5
≤ 1
≤ 0.25
F220
95-96
≤ 1
≤ 0.25
Physical indicators
Main minerals
Al2O3
CAS number
1344-28-1
English name
Brown Fused Alumina
Mohs hardness
Microhardness
2000-2200kg/mm2
melting point
2200 ℃
Operating temperature
1850 ℃
proportion
three
Bulk density (LPD):
three
colour
brown
Crystal form
Tripartite crystal system
The stacking density and magnetic content of brown corundum:
Type granularity
Bulk density (g/cm3)
Magnetic material content (%)
Fixed furnace
F16
≤ 0.044
F20
≤ 0.042
F24
≤ 0.038
F36
≤ 0.034
F60
≤ 0.026
F80
≤ 0.024
F220
≤ 0.018
Tipping furnace
F16
≤ 0.044
F20
≤ 0.042
F24
≤ 0.038
F36
≤ 0.034
F60
≤ 0.026
F80
≤ 0.024
F220
≤ 0.018
The main uses of brown corundum:
Sandblasting surface treatment of metals such as carbon steel, cast iron, and mold steel.
Sand blasting of mechanical components such as cast steel drill pipes, shaft sleeves, and joints.
Surface passivation of die-cast aluminum, die-cast steel cookware, and kitchen utensils before spraying.
Tire mold steel sandblasting cleaning.
Copper flat/needle type heat dissipation substrate sandblasting surface cleaning.
Glass sandblasting atomization.
Ceramic grinding wheel, heavy-duty grinding wheel, grinding wheel.
Resin grinding wheels, ultra-thin cutting discs, angle grinding discs, etc.
Polishing blocks, sponge grinding blocks, etc.
Ceramic components such as ceramic aerators for environmental protection equipment.
Wear resistant flooring, flooring mortar aggregates.

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