Low Na2o White Fused Alumina,Can Be Used In Refractory , Castables And Abrasives

White corundum
White alundum
WFA

Short Description

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 2000˚C 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.

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Chemical Composition

Items			Unit	Index	Typical
Chemical Composition	Al₂O₃		%	99.00min	99.5
	SiO₂		%	0.20max	0.08
	Fe₂O₃		%	0.10max	0.05
	Na₂O		%	0.40max	0.27
Refractoriness			℃	1850min
Bulk density			g/cm³	3.50min
Mohs hardness			---	9.00min
Principal crystalline phase			---	α-Al₂O₃
Crystal size:			μm	600-1400
True density				3.90min
Knoop hardness			Kg/ mm²
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

White Fused Alumina Variants

Products/Spec	Al2O3	SiO2	Fe2O3	Na2O
WFA Low Soda Grains and fines	>99.2	<0.2	<0.1	<0.2
WFA 98 Grains and fines	>98	<0.2	<0.2	<0.5
WFA98% Demagnetized Fines -200,-325 and -500Mesh	>98	<0.3	<0.5	<0.8

Items	Size	Chemical Composition (%)
Items	Size	Fe₂O₃(min)	Na₂O (max)
WA & WA-P	F4~F80 P12~P80	99.10	0.35
	F90~F150 P100~P150	98.10	0.4
	F180~F220 P180~P220	98.60	0.50
	F230~F800 P240~P800	98.30	0.60
	F1000~F1200 P1000~P1200	98.10	0.7
	P1500~P2500	97.50	0.90
WA-B	F4~F80	99.00	0.50
	F90~F150	99.00	0.60
	F180~F220	98.50	0.60

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 2000˚C 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.