White Fused Alumina

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White Fused Alumina Specification

Chemical Composition
Al2O3: 99% min

Application
Abrasive blasting, grinding, polishing, refractory, surface treatment, and lapping

Density
3.6 Gram per cubic centimeter(g/cm3)

Hardness (%)
9 Mohs scale (approximately 99% of corundum hardness)

Surface Finish
Smooth, grit-dependent

Form
Grain, powder, or customized sizes

Melting Point
Over 2000C

Usage & Applications
Suitable for abrasives, refractories, surface preparation, and precision casting

Purity(%)
99% min

Water Absorption
Negligible

Product Type
White fused alumina grain or powder

Types of Refractories
Refractory bricks, castables, and shaped products

Shape
Angular

Porosity
Very low

Dimensional Stability
Excellent at high temperatures

Strength
High mechanical strength

Specific Gravity
3.90 g/cm

Thermal Conductivity
High

Color
White

About White Fused Alumina

White Fused Alumina

Raw Material and Process of Production

White Fused Alumina is a high purity, synthetic mineral.
It is manufactured by the fusion of controlled quality pure grade Bayer Alumina in an electric arc furnace at temperatures greater than 2000C followed by a slow solidification process.
Strict control over quality of raw materials and fusion parameters ensure products of high purity and high whiteness.
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.

Application :

Dedicated lines produce products for different applications.

White Fused Alumina is highly friable and hence used in Vitrified Bonded Abrasives products where cool, fast cutting action is essential and also in the manufacture of high purity alumina refractories. Other applications include use in Coated Abrasives, Surface treatment, Ceramic Tiles, Anti-skid Paints, Fluidized Bed Furnaces and Skin / Dental Care.

Technical Specification :

Items			Unit	Index	Typical
Chemical composition		AI₂O₃	%	99.00 min	99.52
		SiO₂	%	0.20 max	0.11
		Fe₂O₃	%	0.10 max	0.07
		Na₂O	%	0.40 max	0.27
Refractoriness			^OC	1850 min
Bulk Density			g/cm³	3.50 min
Mohs Hardness			----	9.00 min
Principal Crystalline Phase			---	AI₂O₃
Refractory Grade	Grain		mm	0-50,0-1,1-3,3-5,5-8
			Mesh	-8+16,16+30,-30+60,-60+90
	Fines		Mesh	-100,-200,-325
Abrasive & Blasting Grade			FEPA	F12-F220
Polishing & Grinding Grade			FEPA	F240-F1200

Superior Abrasive Performance

White Fused Alumina provides low friability and long abrasive life, making it a preferred choice in precision grinding, lapping, and polishing tasks. Its high purity ensures minimal contamination, while the angular grains offer efficient cutting capabilities and a smooth surface finish, which is grit dependent.

Ideal for High-Temperature Applications

This material excels in refractory uses such as bricks, castables, and shaped products due to its high refractoriness under load (>1700C) and outstanding dimensional stability. Its superior thermal conductivity and very low porosity ensure optimal performance even in extreme conditions.

Environmentally Safe and Versatile

Produced with a non-toxic profile and negligible moisture content (0.3%), White Fused Alumina is suitable for sensitive applications, including surface preparation and precision casting. Custom packaging options and indefinite shelf life under proper storage highlight its adaptability for exporters, suppliers, and both small and large-scale operations.

FAQs of White Fused Alumina:

Q: How is White Fused Alumina used in abrasive blasting and grinding processes?

A: White Fused Alumina, with its angular grain shape and high hardness (9 Mohs), provides effective cutting and surface cleaning in abrasive blasting and grinding applications. The low friability ensures the grains retain their shape longer, delivering a consistently smooth finish and extended abrasive life.

Q: What grain sizes of White Fused Alumina are available, and how do they affect performance?

A: Grain sizes from F4 to F220, as per FEPA standards, are available. Coarser grains suit heavy-duty cutting and blasting tasks, while finer grades are optimal for polishing and precision lapping, allowing users to select the appropriate grit for specific surface finish requirements.

Q: Where can White Fused Alumina be applied in industrial settings?

A: It is widely used in industries such as metalworking, surface preparation, precision casting, and manufacturing refractory bricks and castables. The materials high refractoriness and mechanical strength make it particularly suitable for high-temperature environments.

Q: What benefits does White Fused Alumina offer for refractory manufacturing?

A: Due to its high alumina content, superior mechanical strength, high thermal conductivity, and excellent dimensional stability at elevated temperatures, White Fused Alumina enhances the durability, efficiency, and longevity of refractory bricks, shaped products, and castables.

Q: How should White Fused Alumina be stored to ensure maximum shelf life?

A: White Fused Alumina has an indefinite shelf life when stored in dry, sealed conditions, away from moisture and contaminants. The low moisture content (0.3%) and non-toxic nature also prevent environmental hazards and product degradation.

Q: What packaging options are available for bulk shipments of White Fused Alumina?

A: Packaging options include 25 kg or 50 kg bags, jumbo bags, or customized packages as per customer requirement. These choices ensure safe, convenient transport and storage for exporters, suppliers, and industrial users.

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