BROWN FUSED ALUMINA

Brown Fused Alumina (BFA) is a refractory material which is manufactured by the smelting and refinement of Calcined Bauxite in an electric arc furnace or fixed furnace at temperatures greater than 2000℃. It is also known as electro corundum, brown corundum and brown aluminum oxide, obtaining mineral ally while fusing. The main component is alumina Al₂O₃. It has features of good crystallization, well toughness, low linear expansion coefficient, and corrosion resistance. Together with the advantages of high purity, ecologically clean and extremely hard material, Brown fused alumina is widely used in production of abrasives, refractory and in dry- and wet-blasting applications where it is reusable. Meanwhile, Brown fused alumina is free of not respirable crystalline silica (SiO₂).

 

 

Specific Gravity: 3.94 g/cc

Melting Point: 2020℃

Crystal Structure: α-alumina

Color: Brown

Apparent Porosity: 3.55%

Apparent Specific Density: 3.82 g/cm³

Reversible Linear Expansion: 1.42% at 1400℃

MESH	METRIC (mm)	MESH	METRIC (mm)
3/4" x 5/16"	19.1 - 8.00	20 x 40	0.850 – 0.425
5/16" x 4	8.00 - 4.75	40 x 200	0.425 – 0.075
4 x 10	4.75 - 2.00	TPF II	-0.212
10 x 20	2.00 – 0.850	200 MF	-0.075
10 x 40	0.850 – 0.425	325 MF	-0.045

When it comes to good value for money, brown fused alumina is the first choice among the angular mineral products.

Refractory materials----brown fused alumina, more than 95% Al₂O₃, including section sand, grain-size sand; fine powder and micro powder. It has hundreds of applications as a shaped or unshaped refractory material due to its ability to withstand continuous exposure to the combination of heat, corrosion, abrasion and impact.

 

 

• Refractory Bricks; Insulation Bricks;

• Refractory Cement; Refractory Castables

• Ramming Mass and gunning mixes

• Refractory mortar

• Tiles

• Filter Plates

• Loose grain

• Dense, high temperature refractory products

 

 

As Refractories Grain Sand: 0-1mm, 1-3 mm, 3-5 mm, 5-8 mm, 8-15 mm

As Refractory Fine Powder: -100 Mesh, -200 Mesh, -325 Mesh

 

 

25kg woven bags; 1000kg bulk big bags;

55 lbs woven bags; 2,200 lbs bulk big bags

Fused alumina is an ecological material – the content of the Al2O3 in the material depending on your needs. The next chemical content is for refractory bricks.

Brown Fused Alumina (Grains) Bricks 0-1mm, 1-3mm, 3-5mm

Characteristic	Typical Value	Specification Control
		Min.	Max.
Al2O3	95.3	95	--
Fe2O3	0.2		0.3
SiO2	1.0		1.2
TiO2	2.6		3.0
CaO	0.3		0.4
MgO	0.3		0.4
Magnetic Particles	0.03		0.05
Hardness	9 Mohs
Specific Gravity	3.8 g/cm³ min

Brown Fused Alumina (Fines) Bricks -200 mesh, -325 mesh

Characteristic	Typical Value	Specification Control
		Min.	Max.
Al2O3	95	94.5	--
Fe2O3	0.2		0.3
SiO2	1.2		1.5
TiO2	2.6		3.5
CaO	0.3		0.4
MgO	0.3		0.4
Magnetic Particles	0.03		0.05
Hardness	9 Mohs
Specific Gravity	3.8 g/cm³ min

 

 

Processing Methods: Barmac / Roller

Grain Shapes: Angular / Cubic

 

Bauxite→Bauxite Calcining→B. C. Storage→Automatic Batching→Corundom Smelting→Tilting & Cooling→BFA Lump Stock→Crushing & Sieving→QC Lab

 

1) High quality bauxite as raw material
2) Refractory temperature is more than 2000°C
3) No burst, no pulverization and crack in the using course of refractory
4) Very low amount of iron oxide

5) High melting point

 

 

1. Owning ourselves bauxite ore and factory, the quality and price are competitive.

2. Our Brown Fused Alumina Micro Grits offer unmatched hardness and durability for precision applications.

3. They increase productivity with their high cutting efficiency and excellent toughness.

4. We adhere to rigorous quality control measures, ensuring consistent top-tier performance.

5. Our product is environmentally friendly, aligning with your sustainability goals without compromising on quality.

 

BFA is a product manufactured by gradual melting reduction of calcined bauxite in an electric arc furnace at high temperature (approximately 2000 degrees Celsius). Its chemical composition consists mainly of Al2O3 (94,5-97%) and vestigial amounts of TiO2, SiO2, Fe2O3, CaO and MgO.

Brown Aluminum Oxide is characterized by good toughness, high mechanical resistance and hardness (9 in Mohs scale). The microhardness of the material reaches about 1900kG/mm2. Specific gravity (density) equals 3,90+/-0,05 g/cm3. Bulk density depending on size equals 1,52-1,87 g/cm3. It has relatively high thermal conductivity and low thermal expansion. As regards electricity it is an insulator.

Brown Fused Alumina is a good material for refractories.

 

 

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