Brown Fused Alumina

Aluminium Oxide Grains

Brown fused alumina is produced by the smelting of Calcined Bauxite in an electric arc furnace at temperatures greater than 2200°C. A slow solidification process follows the fusion, to yield blocky crystals. The melting help in removing residual carbon , Strict control over Titania levels during the fusion process ensures optimum toughness of the grains. Then The cooled crude is further crushed, cleaned of magnetic impurities in high intensity magnetic separators and classified into narrow size fractions to suit the end use. Dedicated lines produce products for different applications.

Applications

Brown Fused Alumina is a tough, sharp abrasives which is highly suitable for grinding metals of high tensile strength. Its thermal properties make it an excellent material for use in the manufacture of Grinding wheels and refractory products. This material is also used in other applications like blasting and surface hardening. The Mohs hardness of the material is 9.0 and The density is 3.9gm/cm³.

Available Products

AGV - Vitrified bonded abrasives
The abrasive grains perform the cutting action. An ideal grinding abrasive has the ability to fracture before serious dulling occurs and offers maximum resistance to point wear. Each abrasive has special crystal structure and fracture characteristics, making it suitable for grinding operations on specific materials. A tough, sharp grain produced under controlled conditions and especially adapted to grinding or cutting materials of high tensile strength, such as alloy steel, high speed steel, annealed, malleable iron, and tough bronze.

Typical Chemical Analysis

Al₂O₃ (Min%)	SiO₂ (Max %)	Fe₂O₃ (Max%)	TiO₂(Max %)
95.5%	1.2	0.3	3.0

Grit Sizes Available (F)
12, 16, 20, 24, 30, 36, 40, 46, 54, 60,70, 80, 90, 100, 120, 150, 180, 220, 240, 280, 320 (FEPA STANDARD).

AGHTL - Heat Treated (roasted above 900°C)
The Brown Aluminium Oxide grains are heat treated and roasted above 900°C in order to give more toughness and durability of the grains . It also removes the cracks and gives the blocky structure with high bulk density. Typical Chemical Analysis

Al₂O₃ (Min%)	SiO₂ (Max %)	Fe₂O₃ (Max%)	TiO₂(Max %)
95.5%	1.2	0.3	3.0

Grit Sizes Available (F)
12,16,20,24,30,36,40,46,54,60,70,80,90,100,120,150,180,220 (FEPA STANDARD)

AGHTH - Heat Treated (roasted above 1350°C)
The Brown Aluminium Oxide grains are heat treated and roasted above 1350°C in order to give more toughness and durability of the grains . It also removes the cracks and gives the blocky structure with high bulk density. It is tougher than AGHTL grains and lasts long but costlier than AGHTL.

Typical Chemical Analysis

Al₂O₃ (Min%)	SiO₂ (Max %)	Fe₂O₃ (Max%)	TiO₂(Max %)
95.5%	1.2	0.3	3.0

Grit Sizes Available (F)
12,16,20,24,30,36,40,46,54,60,70,80,90,100,120,150,180,220 (FEPA STANDARD)

AGR - Resinoid bonded abrasives

A regular Brown Aluminum oxide with medium bulk density angular shaped grains used in bonded abrasive products. It is produced in a full range of grit sizes for grinding wheel manufacturing, especially formulated for using in all resinoid bonded abrasive products.
Typical Chemical Analysis

Al₂O₃ (Min%)	SiO₂ (Max %)	Fe₂O₃ (Max%)	TiO₂(Max %)
94.0	1.5	0.5	3.0

Grit Sizes Available (F)
12,16,20,24,30,36,40,46,54,60,70,80,90,100,120,150,180,220,240,280,320 (FEPA STANDARD).
This type of grains are mainly used Resinoid bonded applications .

AGC - Coated abrasives
With a very sharp grains and carefully controlled particle size distribution, this type of grains are specially prepared to be used in all types of coated abrasives applications such as paper, cloth, belts etc.

Typical Chemical Analysis

Al₂O₃ (Min%)	SiO₂ (Max %)	Fe₂O₃ (Max%)	TiO₂(Max %)
95.5	1.2	0.5	3.0

Grit Sizes Available (p)
12,16,20,24,30,36,40,50,60,80,100,120,150,180,220,240,280,320 (FEPA STANDARD)
This type of grains are mainly used in coated abrasives applications.

AGCC - Ceramic Coated for Coated abrasives
A coating of ferric oxide on the brown aluminium oxide grains improves the toughness of the grains. It increases grinding efficiency and improves grain size surface area ratio.

Typical Chemical Analysis

Al₂O₃ (Min%)	SiO₂ (Max %)	Fe₂O₃ (Max%)	TiO₂(Max %)
95.5	1.2	0.5	3.0

Grit Sizes Available (F)
12,16,20,24,30,36,40,50,60,80,100,120,150,180,220,240,280,320 (FEPA STANDARD)
This type of grains are mainly used in premium quality coated abrasives applications where durability and long life is required.

AGSFA - Semi Friable Alumina
It is brown aluminium oxide containing low titanium di-oxide produced by controlled smelting of special grade bauxite in an electric arc furnace above 2000°C. the lower titanium gives an intermediate toughness between brown and white aluminium oxide to ensure consistent quality. Also the grains are further annealed at intermediate temperatures to get predictable toughness.

Typical Chemical Analysis

Al₂O₃ (Min%)	SiO₂ (Max %)	Fe₂O₃ (Max%)	TiO₂(Max %)
98.5	1.0	0.5	1.8

This type of grains are used in high quality bonded and coated abrasive products.

AGBL - For blasting applications
It is brown aluminium oxide specially prepared for shot blasting applications. The low iron content and the hardness of the grains make it suitable in all types of metal processing . The carefully controlled grain size distribution make it completely recyclable and hardness makes it last long.

Typical Chemical Analysis

Al₂O₃ (Min%)	SiO₂ (Max %)	Fe₂O₃ (Max%)	TiO₂(Max %)
93.5	1.5	1.0	3.5

Grain sizes are customer specific and caters to special blasting applications.

AGBB - Industrial Grade
This grade brown aluminium oxide suitable for many industrial applications where iron content is not a matter of concern. It is a by product of our main products and the sizes are available randomly. A low priced product and the chemical composition varies time to time.

AGSPL - Customer specific
Brown Aluminum oxide finds its use in numerous fields such us surface coating, brake lining, monuments , wood cutting etc. Depending on the application and their requirement the customers are advised on the type and size of grains.

Algrain

Contacts

Brown Fused Alumina