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

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.

Products Details

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.

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
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 (%)
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
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.

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