Fused Alumina Brown (BFA):

Description:

Brown Fused Alumina (BFA), also known as Brown Fused Aluminum Oxide, Brown Aluminum Oxide or Brown Corundum, named by its mainly brown color, is an artificial electro fused corundum obtained from reduced fusion of high quality bauxite together with other raw materials in 2000℃ electric arc furnaces. Bauxite used for producing of BFA contains high Aluminum Oxide (Al2O3).

After the fusion process, the materials are mixed and fused into liquid materials, then cooled down and crushed (milled) into lump sizes. The lump sizes are then crushed into finer grades or powders and refined by sieving equipment into materials of different particle distribution for different applications.

Brown Fused Alumina is an important material for abrasives, refractory and blasting industries used for different applications. It’s a hard, tough, abrasion-resistant, heat-resistant, dense material. We at PreRish Tri make according to FEPA, JIS, GB, ISO standard to customers in different industries and countries. 0-1mm,1-3,3-5mm etc for refractories, FEPA F sizes for bonded abrasives aluminum oxide tools, FEPA P sizes for coated abrasives aluminum oxide products. It’s an important industrial abrasives, refractory minerals and sandblasting media. The Brown Fused Alumina we make are with fine sieve distribution, good chemical contents and bulk density for high quality abrasives and refractory applications, also a nice media for sandblasting, shot blasting, polishing, painting etc.

 

BFA Characters:

  • Refractory/Fireproof

Brown Fused Alumina contains 94%-97% Aluminum Oxide (Al2O3) which makes it an material which resists high temperature, corrosion and has good thermal conductivity. It is an ideal raw mineral for shaped and unshaped refractory products and fireproof products, especially in steel making industry.

  • High Hardness

Brown Fused Alumina has about 95% Aluminum Oxide (Al2O3) which makes it have high hardness (Mosh 9). High hardness makes it an ideal material for cutting, polishing, grinding, sand blasting etc with more recycle times and not easy to break.

  • High Strength

Brown Fused Alumina contains Al2O3 and little content of Titanium Oxide (TiO2) and Iron Oxide (Fe2O3) and is a very tough material with 9 grade mosh hardness. This character makes it good for cutting, abrasives, polishing, lapping of various materials and can be used durably and recycled.

  • Sharp Grain

During fusion, Brown Fused Alumina is made a crystal material with sharp edges and ideal for durable grinding, polishing and abrasives. During blasting industry, BFA grains are used as a blasting media to prepare surface of metal, ceramic, wood and other materials. PreRish Tri produces round shape/cubic/blocky shapes, better for abrasives and with higher density.

  • High Density

Brown Fused Alumina is a dense material with high bulk density and true gravity. It is used as a material in casting and water purifying processes.

  • Clean Material

We wash the BFA materials by air, water or acid and remove magnetic contents by powerful magnetic removing equipment to make sure that our materials are with little dust and magnetic contents. Dust and magnetic content may cause cracks on refractory bricks or grinding wheels, and may cause possible contamination to surfaces blasted or even explosion without professional care.

  • Fine Particle Distribution

We make Brown Fused Alumina exactly according to FEPA, China GB, Japan JIS, American ANSI or International ISO standard on Brown Fused Alumina Macro Grits and Micro Grits so that our materials are with fine particle distribution grits. And we check our sieves against standard from time to time. PreRish Tri’s Technically Trend QC Team checks particle distribution every 2 hours during production.

 

BFA Properties:

Physical Specifications
Color Brown
Grain Shape Angular or Sharp Edged
Mosh Hardness 9
Melting Point 1950℃
True Gravity 3.6g/cm3-4.1g/cm3
Bulk Density 1.5g/cm3-2.2g/cm3

 

Chemical Specifications
Aluminium Oxide(Al2O3) 93.5%-97% depending on sizes
Iron Oxide(Fe2O3) 0.3%max
Titanium Oxide(TiO2) 1.8%-2.5%
Silicon Oxide(SiO2) 1.5%max

 

Special Treatment/Process:

  • Heat Treatment, Shape Improve, Acid Wash, Water Wash, Brown Fused Alumina Micro Grit Fines(F280-F2500)
  • Brown Fused Alumina fused in Tilting Furnace with higher Aluminum Oxide content and less impurities.

 

BFA Standard Sizes & Applications:

Refractory Bricks, Furnace Lining, Crucibles, Pre-Casting, Gunning Material, Refractory Mortars, Refractory Cast-able:

0-0.2mm,0-0.5mm,0.5-1mm,1-3mm,3-5mm,5-8mm,100mesh,200mesh,325mesh