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  Brown Fused Alumina
 
Brown emery
【Posted by:佚名】【Source:Brown emery】【Published:2017/2/28】

Brown emery

Brown emery belongs to the group of the electro-corundum.

Brown emery is produced by controlled melting fo the calcined bauxite in an electric arc furnace.

Brown emery is iron-free and extremely tough.

 

Applications

Reusable abrasive

Wear-resistant & refractory products

Grinding,lapping & polishing medium

Ceramic grinding wheels & grinding media

Polishing wax & paste

 

Typical Physical Properties

Hardness

9 mohs

Grain shape

Angular

Melting Point

1950 C min

True density

3.9-4.1g/cm3

Bulk density

1.5-2.1g/cm3(depends on the size)

 

Typical Chemical Analysis

Al2O3

95%min

TiO2

3%max

Fe2O3

0.5%max

SiO2

1.5%max

CaO

0.5%

NaO

0.%

 

Typical Size

F-microgrit

F240, F280, F320, F360,F400, F500, F600, F800, F1000

GB-microgrit

W63, W50, W40, W28, W20, W14, W10, W7

JIS-microgrit

JIS240, JIS280, JIS320, JIS360, JIS400, JIS500, JIS600, JIS700, JIS800, JIS1000, JIS1200, JIS1500, JIS2000, JIS2500, JIS3000,

Fepa standard

FEPA-Federation of European Producers of Abrasives

GB standard

Chinese stantard

JIS standard

Japanese Industry Standard

Other grain sizes can be produced if required.

 

 

 

F-microgrits sizes bonded

Grit designation

Mean grain size ds50-value in um

F230

53.0±3

F240

44.5±2

F280

36.5±1.5

F320

29.2±1.5

F360

22.8±1.5

F400

17.3±1

F500

12.8±1

F600

9.3±1

F800

6.5±1

F1000

4.5±0.8

 

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