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White Fused Alumina for Refractories

White Fused Alumina for Refractories

White fused alumina  is a high-grade refractory raw material, made of high-quality industrial alumina powder after being melted at a high temperature above 2200℃ in an electric tilting furnace and then cooled. Its main crystal phase is α-Al2O3, and the color is white.

It is the main raw material for the production of high-grade unshaped and shaped refractories,it’s widely used in variety industries.

Features

1.High refractoriness

2.Good wear resistance and corrosion resistance

3.High load temperature when making products

4.Improve the volume stability and thermal shock resistance of materials.


Product Detail

Product Tags

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Chemical Composition

Chemical 

Composition

Grit > 0.1mm

Typical Value

Fine Powder

≤ 0.1mm

Typical Value

Al2O3%≥

99.2

99.5

99

99.3

SiO2%≤

0.1

0.03

0.15

0.08

Fe2O3%≤

0.1

0.03

0.1

0.06

K2O+Na2O%≤

0.35

0.25

0.4

0.3

Apparent Porosity %≤

8

6

   

Common Bulk Density g/cm3

3.6

3.65

   

High Bulk Density g/cm3

3.68

3.72

   

True Density g/cm3

3.9

3.93

3.9

3.93

 

Chemical Composition Of Low SodiumMicro Sodium White Fused Alumina

Chemical Composition

Low Sodium

Micro Sodium

Guarantee Value

Typical Value

Guarantee Value

Typical Value

Na2O % ≤

0.15

0.08

0.08

0.02

Al2O% ≥

99.4

99.7

99.6

99.8

SiO% ≤

0.1

0.05

0.1

0.05

Fe2O% ≤

0.05

0.02

0.05

0.02

 


Particle Size Composition Standard

Specification

Coarse Grain

Basic Grain

Fine Grain

Mesh Size

mm

Mass Percent Of Oversize

 %

Mass Percent

% 

Mesh Sizemm

Mass Percent Of Undersize 

%

25 ~ 15

20

8

83

115

9

15 ~ 10

15

110

8 ~ 5

8

5

5 ~ 3

5

3

3 ~ 1

3

1

1 ~ 0

1

0.075

10

1 ~ 0.5

0.5

9

1 ~ 0.3

0.3

0.5 ~ 0

0.5

67

0.075

25

0.3 ~ 0

0.3

82

0.045

10

0.2 ~ 0

0.2

77

15

0.088 ~ 0

0.09

10

90

 

 

0.074 ~ 0

0.075

 

 

0.044 ~ 0

0.045

   

Note: Various section sand and fine powder can be processed according to customer needs

WFA 5-3 mm

Grit and Fine Powder

0-0.1mm 0-0.2mm 0-0.5mm 0-1mm 0.5-1mm 1-3mm 3-5mm 5-8mm, 5-10mm, 10-25mm, 100mesh 200mesh 325mesh ...

Other spec are available upon request. Low sodium, Micro sodium WFA are both available.

fine powder

Product Advantages

1. Low sodium and micro sodium WFA can be provided. Na2O can be double 0.
2. Bulk density can really reach 3.6 g/cm3, which can meet needs of various high-grade refractory materials.
3. YUFA spends 24hours non-stopping melting the WFA, using a tilting furnace with a diameter of 6.5m in order to pursue the high-grade and stable quality.
4. Various specifications can be supported.

Applications

ap (6)

MONOLITHIC REFRACTORIES

Ideal materials for the production of large-scale ladle casting materials, high-grade iron trench casting materials, spraying materials, prefabricated parts and other unshaped refractory materials.

SHAPED REFRACTORIES

Corundum bricks, corundum and mullite corundum saggers, refining. The main raw material of various corundum products is corundum porous plug brick, integral spray gun, composite nozzle, high-temperature industrial furnace lining material etc.

ap (4)

1. White corundum powder is widely used in steel, cement, ceramics, petroleum and other industries.

2. It is an ideal raw material for making large-scale ladle castables, medium and high-grade iron trough castables, gunning materials, preforms and other unshaped refractory materials.

3. It is also the main raw material for various corundum products such as corundum bricks, corundum and mullite corundum saggers, corundum porous plugs for refining, integral spray guns and composite nozzles, and high-temperature industrial furnace lining materials.


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