Brown Fused Alumina (A)

Short Description:

  1. Brown fused Alumina. Code A   Brown fused alumina is the most traditional abrasive materials. The main material of Brown fused alumina is bauxite, which is electrically fused in high temperature. It is brown and features high hardness and toughness. The abrasive tools made by Brown Aluminium Oxide are suitable for grinding the carbon steel, malleable cast iron, hard bronze etc. In addition, it is also widely used in refractory materials, chemical additives, precision casting and ant...


Product Detail

 

1. Brown fused Alumina. Code A

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Brown fused alumina is the most traditional abrasive materials. The main material of Brown fused alumina is bauxite, which is electrically fused in high temperature. It is brown and features high hardness and toughness. The abrasive tools made by Brown Aluminium Oxide are suitable for grinding the carbon steel, malleable cast iron, hard bronze etc. In addition, it is also widely used in refractory materials, chemical additives, precision casting and antissliding material, sand blasting, etc.

Standard:       FEAP- F (for Bonded abrasives), 

                          FEPA- P (for Coated abrasives) 
Grit available:  Grit FEPA F12 – F220#. 

                                           F240-F2000# (Micro powder)
                           Grit FEPA P12-220#. 

                                            P240-P2500# (Micro powder)

 

2. Calcined Brown Fused Alumina, +1350 oC

201804140010

 

CODE: BC-BFA -HC1350

 

After calcined at temperature 1350℃ , the brown fused alumina shows blue. Impurities in the grains will be separated out or vaporized . The surface of each particle becomes coarser. This improves its hydrophilicity greatly. After 1350℃ calcinations, inner cracks of the particles from crushing and crystal cooling process are closed, Hence the toughness,strength becomes some better than normal BFA and the wearing resistance is enhanced too.

This product is mainly used for making high speed strong sanding belt, high grade bonded abrasives, resin-bonded abrasive wheels ,sand paper, large cutting disc, for applications of grinding stainless steel plate, alloy steel and cemented carbide . 

Comparison of toughness (Ball mill method) : BFA common grits and BFA Calcined at 1350℃

Grit size(P standard) Common Grade BFA  BFA Calcined 1350℃ Increaser ate (%)
P24 17.15 49.35 187.8
P30 27.8 49.5 78.1
P40 29.5 53.5 81.4
P60 31.9 52.8 65.5
P100 54.2 67.8 25.1
P150 60.2 76.8 27.6
P220 63.5 72.8 14.6

 

Standard:        FEAP- F (for Bonded abrasives),  

                           FEPA- P (for Coated abrasives) 

Grit available:   Grit FEPA F12 – F220#.  

                           Grit FEPA P12-220#.  

Other sizes are also available on request. 

 

 

3. Heated & Ceramic-coated Brown fused alumina

20180414002-0

CODE: BC-BFA-HCC

BFA-HCC is ceramic coated with ferric oxide on the surface by a specific processing. It is made from high quality brown fused alumina calcined at high temperature through intensive deep processing. The product features a large specific surface area, stronger hydrophilicity, even particle size ,higher purity, stronger binding power ,cutting effciency and good heat dispersion performance , it is main performance indexes are as below: comparing with normal BFA, micro-hardness of BFA-HCC increases 10% ,toughness increases 10%, hydrophilicity increase 3.5 times, grinding and cutting quantity increases 3% and efficiency increase 30%-50% . It is better choice for making top grade coated abrasive and top grade resin bonded wheels.

 

Comparison of physical performance: Normal BFA and BFA-HCC

Item name (Grit 60#)  Hhydrophilicity (Grit 60#)  sand-out (Grit 30#)  single particle compressive strength (Grit 60#)  Toughness
Normal BFA 60mm 1.60g 27.0N 32.0%
BFA-HCC 141mm 1.53g 31.0N 59.0%
Improvement Up 130% Down 4.2% Up 14.7% Up 83.3%

 

Standard: FEAP- F (Bonded abrasives),  FEPA- P (Coated abrasives) 

Grit available:  Grit FEPA   F12 – F220#.  

                         Grit FEPA    P12 – P220#.  

Other sizes are also available on request. 

 

 


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