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brown alundum is made of bauxite, anthracite coal, and smelted in electric-arc furnace of high temperature more than 2000 degrees. Abrasives tools made by brown fused alumina are suitable for metal with high tensile(like: steel, malleable iron, bronze etc). Suitable for product high consolidation abrasive, and suitable for grinding, polishing, blasting, precision casting etc. brown fused alumina is also used for refractory material. Brown fused alumina with characteristics like: high purity, good crystalline liquidity, low coefficient of linear expansion, corrosion resistance, high temperature, high strength.

 

一, Main Physical Properties

COLOR

BROWN,RED BROWN

MOHS HARDNESS

                 9.0

 BULK DENSITY

             1.75-1.95g/cm3

SPECIFIC GRAVITY

3.6-3.9g/cm3

 volume density

3.6-3.9g/cm3

 melting point

2250°C

 maximum service temperature

1900°C

 

二, Application


 1. environmental blasting for aluminium profile/Copper material of glass/water to wash jeans


 2. Grinding for kinescope/glass/monocrystalline silicon/lens/jadeware


 3. Abrasion-proof material for expressway/airstrip/dock/parking lot/stadium

4. Bonded abrasives and Coated abrasives

5.  Surface preparation and finishing

6.Thermal Spraying (Plasma Spraying)

7.  Surface preparation and finishing

8.Super Refractories, Ceramics and Tiles

9. Lapping & Micro-blasting applications

    

三、Used for refractory,castable

 

1, Used for refractory,castable

 

 

 

  

   Properties

       Type

 

/sand 0-11-3, 3-55-8mm

/Fines  0-100#  0-200#  0-320#


Guarantee  Value


Typical Value


Guarantee Value


Typical Value

 


Chemical

Composition

Al2O3

  ≥94.5

 96.1

 ≥92

 94.1

SiO2

  ≤1.5

 1.16

 ≤2

 1.56

Fe2O3

  ≤0.5

 0.13

 ≤0.55

 0.28

TiO2

  ≤3

 1.78

 ≤3.3

 2.25

 

 

 

 

2,Used for abrasives,blasting,grinding

    

 

 

properties

 

      Type

              Grains

8# 10# 12# 14# 16# 20# 22# 24# 30# 36# 40# 46# 54# 60#

70# 80# 90# 100# 120# 150# 180# 220#

 Guarantee Value

Typical Value

 

 Chemical

Composition

Al2O3

       ≥93

     95.65

SiO2

       ≤2.0

     1.04

Fe2O3

       ≤1.5

     0.14

TiO2

       ≤3.5

     2.2

3,  Used for abrasives ,lapping,Polishing

    

 

  properties

      Type

                           Micropowder

“W”

W63 W50 W40 W28 W20 W14 W10 W7 W5 W3.5

“FEPA”

F230 F240 F280 F320 F360 F400 F500

F600 F800 F1000 F1200 F1500

“JIS”

240# 280# 320# 360# 400# 500# 600# 700# 800# 1000#

1200# 1500# 2000# 2500# 3000#

Guarantee Value

     Typical Value

 

 Chemical

Composition

Al2O3

                ≥92

   93.8

SiO2

                ≤2

   1.4

Fe2O3

                ≤2

   1.2

TiO2

                ≤4

   3.2

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