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Brown Fused Alumina

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Brown Fused Alumina Specification

Usage & Applications
Metallurgical, grinding, polishing, refractory, casting

Water Absorption
Negligible

Surface Finish
Rough to medium, suitable for industrial use

Melting Point
2040C

Chemical Composition
Al2O3: 95% min; Fe2O3: 0.5%; SiO2: 1.5%; TiO2: 3.5%

Application
Abrasives, refractory materials, grinding wheels, sandblasting, surface preparation

Density
1.95 Gram per cubic centimeter(g/cm3)

Form
Grains, powder

Purity(%)
95%

Hardness (%)
Mohs Hardness: 9

Product Type
Brown Fused Alumina

Types of Refractories
Monolithic refractories, shaped refractory products

Shape
Angular, irregular

Porosity
Low

Dimensional Stability
Excellent

Strength
High mechanical strength

Specific Gravity
3.90 g/cm

Thermal Conductivity
Good

Color
Brown

Shelf Life
Stable, indefinite under proper storage conditions

Manufacturing Process
Produced by electric arc fusion of calcined bauxite

Bulk Packing
25kg bags, jumbo bags or as required

Solubility
Insoluble in water

Toxicity
Non-toxic

Resistance to Wear
Exceptional

Corrosion Resistance
High chemical resistance

Electrical Insulation
Excellent electrical insulating properties

Thermal Expansion Coefficient
8 x 10^-6 /K

Grain Size
Available in F12-F220 or customized sizes

About Brown Fused Alumina

Process of Production

Brown Fused Alumina is produced by the smelting of Calcined Bauxite in an electric arc furnace at temperatures greater than 2000^oC. A slow solidification process follows the fusion, to yield blocky crystals. The melting help in removing residual sulphur and 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.

Application :

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 refractory products. This material is also used in other applications like blasting and surface hardening.

Technical Specification :

Grade	Specification	Chemical Composition
Grade	Specification	AI₂O₃	SiO₂	Fe₂O₃	TiO₂	CaO
Brick Grade	0-1,1-3,3-5mm -8+16,-16+30,-30+60 mesh, Fines	> 95.2	< 1.0	< 0.3	< 0.3	< 0.4
Castable Grade	0-1,1-3,3-5mm -8+16,-16+30,-30+60 mesh, Fines	> 95	< 1.5	< 0.3	< 0.3	< 0.4
Vitrified Grade	F12-F220	> 95.5	< 1.0	< 0.3	2.2-3.0	< 0.4
Resin & Blasting Grade	F12-F220	> 95	< 1.5	< 0.3	< 0.3	< 0.4
Micro Grade	P240-P1200	> 92-95	< 1.0-1.8	< 0.3-0.5	< 2.2-45
Micro Grade	F240-F1000	> 88-95	< 1.0-2.5	< 0.3-0.5	< 2.2-6.5
Melting Point		2050^oC
Refractoriness		1980^oC
True Density		3.90 ming/cm³
Mohs Hardness		9.00min

Brick / Vitrified Grade BFA : Is produced using special grade Bauxite in controlled fusion parameters. This grade is suitable for Bricks / Vitrified products preventing Cracks/Fissures, Holes and Black spots in the end product.

Superior Material for Abrasives and Refractories

Brown Fused Alumina is renowned for its exceptional hardness, high chemical purity, and robust thermal stability. Its unique composition provides outstanding resistance against mechanical wear and corrosion, making it the preferred choice for manufacturing abrasives, grinding wheels, and as a key component in refractory products for challenging environments.

Versatile Applications Across Industries

With its angular grain structure and high mechanical strength, Brown Fused Alumina is widely used in metallurgical processes, polishing, sandblasting, and surface preparation. Its excellent electrical insulation and low water absorption further enhance its value across diverse industrial sectors, ensuring reliable performance and product longevity.

FAQs of Brown Fused Alumina:

Q: What are the main applications of Brown Fused Alumina?

A: Brown Fused Alumina is commonly used in abrasives, grinding wheels, sandblasting, surface preparation, refractory materials, casting, and metallurgical processes due to its high hardness and chemical resistance.

Q: How is Brown Fused Alumina manufactured?

A: This product is produced through electric arc fusion of calcined bauxite, resulting in grains with high alumina content and exceptional mechanical and thermal properties.

Q: When should Brown Fused Alumina be used instead of other abrasives?

A: Brown Fused Alumina is ideal for applications requiring high strength, hardness, and resistance to wear and corrosion, especially in demanding industrial processes such as grinding, polishing, and crafting refractory products.

Q: Where can Brown Fused Alumina be supplied and in what packaging?

A: It is available from exporters, importers, and suppliers in India and can be packed in 25kg bags, jumbo bags, or as per customer requirements to suit varied industrial needs.

Q: What are the benefits of using Brown Fused Alumina in industrial processes?

A: Key benefits include excellent wear and corrosion resistance, high thermal stability, negligible water absorption, outstanding electrical insulating properties, and reliable shelf life under proper storage conditions.

Q: How does the grain size affect the usage of Brown Fused Alumina?

A: Grain size from F12-F220 or customized selections determines its suitability for different industrial tasks; coarser grains are preferred for heavy-duty grinding while finer particles excel in precision polishing.

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