Brown Fused Alumina Powder

Brief introduction of brown fused alumina powder

Brown fused alumina uses bauxite, coke as the main raw material, smelting in the electric arc furnace at high temperature. The composition of brown corundum mainly include AL2O3, TiO2, also contains a small amount of SiO2 and Fe2O3, micro hardness is HV1800-2200. The toughness is lower than silicon carbide, higher than that of white corundum, hardness is 9.0, slightly lower than the same level of white fused alumina. Commonly used brown fused alumina can be divided into brown fused alumina powder, brown fused alumina segment of sand,brown fused alumina granular sand. Today, I mainly explain the brown fused alumina powder related knowledge for you.

Brown fused alumina powder specifications:

Commonly used brown fused alumina powder specifications: 325,400,600,800,1000. . . . (Head) Gongyi Qingyun Refractories Co., Ltd. can adjust production according to customer requirements?

brown fused alumina powder
brown fused alumina powder

Properties of brown Alumina powder

The brown fused alumina powder has moderate hardness, high toughness, good self-sharpening ability, low sand consumption and recyclable use, good abrasion and abrasion resistance, and chemical composition stability, abrasion resistance, acid and alkali resistance. Especially its high hardness, specific gravity large, chemical stability and its unique self-sharpening, etc., so used as the first choice in brown fused alumina abrasive sandblasting process , but also the best choice for cleaning up the work piece.

Abrasives made of brown fused alumina powder , suitable for processing a variety of general steel, malleable iron, hard bronze, etc., can also produce high-grade refractories. Brown fused alumina abrasive use high-quality brown fused alumina as raw materials, using modern new unique technology from refining.Brown fused alumina sandblasting has characteristics of short grinding time, high efficiency, good efficiency and low price. The abrasive shell-shaped fracture, sharp edges and corners, in the crushing classification in the formation of new edges and edges, so that the grinding ability is better than other abrasives.

BFA Brown Fused Alumina powder in refractory
Brown corundum micro powder is produced by a reduction fusion of high quality bauxite in electric arc furnaces. It is both a hard and tough material with high strength, making it an excellent abrasive grain for applications.Its thermal properties make it an excellent raw material for abrasive and refractory applications.

Advantages Of Brown Corundum Powder:
1. Large crystal, high strength, good toughness, dense texture, high bulk density.
2. Stable performance between batches.
3. The higher grinding efficiency and polishing brightness, the grinding efficiency is much higher than the soft abrasives such as silica.
4. Good particle appearance, high surface finish of the polished object.

Product Parameter
Grains Specifications And Composition
JIS
240#,280#,320#,360#,400#,500#,600#,700#,800#,1000#,1200#,1500#,2000#,2500#,3000#,3500#,4000#,6000#,8000#
European standard
F240,F280,F320,F360,F400,F500,F600,F800,F1000,F1200,F1500
National standard
W63,W50,W40,W28,W20,W14,W10,W7,W5,W3.5

Applications
High Quality Brown Fused Alumina Powder for Precision Casting Bfa Brown Fused Alumina Powder in Refractory
1.Grinding and polishing of stainless steel, optical glass, bamboo or other materials.
2.For polishing various spare parts: bicycles, sewing-machine, hard metal tools, medical apparatus, timepieces, glass products and stone grinding.
3.For making abrasive tools: fiber-reinforced cutting wheels, grinding wheels, sand cloth, paper and paste.
High Quality Brown Fused Alumina Powder for Precision Casting Bfa Brown Fused Alumina Powder in Refractory

Advantages of SICHENG Brown fused alumin:



1. Brown corundum is characterized by high purity, dense texture, large stacking density, strong self-sharpness, good toughness and extremely low magnetic content;

2. The grinding tool made of it has the advantages of sharp grinding, low heating rate, high grinding ratio and less adhesion in use;

3. The sintered abrasive tool has the characteristics of deep blue color, no network crack and no rust spot after firing.

Brown corundum micro powder takes the high-quality bauxite ore in deep underground as the raw material, produced by 24 hours uninterrupted high-current high-temperature smelting, cooling and crystallization. The conversion rate of the �±-Al2O3 is over 99%, can be produced according to JIS, European Standard, National Standard, or according to customers special requirements.

White Fused Alumina Introduction
White Fused Alumina (white corundum) is produced by the grinding & classification of selected Macro grain feed stock in an advanced milling and classifying facility. This ensures an iron free product of narrow particle size distribution and high whiteness.
White Fused Alumina Physics Properties
Color
White
Crystal form
Triangal crystal system
Mohs hardness
9.0-9.5
Micro hardness
2000-2200 kg/mm�²
Melting point
2250
Maximum operating temperature
1900
True density
3.90 g/cm�³
Bulk density
1.5-1.99 g/cm�³

White Fused Alumina Chemical Position Standards
Code and Size Range

Chemical Composition%
AI2O3
SiO2
Fe2O3
Na2O
F90-F150
99.50
0.10
0.05
0.30
F180-F220
99.50
0.10
0.05
0.30
#240-#3000
99.50
0.10
0.05
0.30
#4000-#12500
99.50
0.10
0.05
0.30

Brown fused alumina is called industrial teeth, in addition to the application in refractories, can also be used in sandblasting, free grinding, resin abrasive, filter media, hydraulic cutting and so on. Brown fused alumina sand put bauxite as raw material, obtained by high temperature smelting, its basic mineral is a-Al2O3, the hardness of brown fused alumina sand is high, high melting point, thermal conductivity, high temperature volume stability, not easy to crack, acid resistance,alkali resistance , suitable for casting core surface sand, paint and investment casting system shell material, and can be used as plain carbon steel, alloy steel, hard bronze, cast iron pieces of coarse grinding and free abrasive. The price of brown fused alumina is lower than that of same level white corundum, it has a better cost performance.



Brown fused alumina sand often is irregular prism reddish brown or brownish black particles, bulk density: 1.65g / cm, hardness 9.1. The composition of brown corundum are (%): Al2O3: 92-98.8%, SiO2: 1.3-%. Product specifications: 16 # 20 # 24 # 30 # 36 # 46 # 60 # 80 # 100 # 120 # 150 # 180 # 200 # 240 # 260 # 280 # 320 # 400 # 500 # 600 # 800 #. Packing: 25KG / woven belt. Qingyun corundum refractory companies can also produce according to customer requirements.
brown fused alumina sand
Brown fused alumina sand, brown fused alumina powder is with moderate hardness, high toughness, strong anti-crushing ability, high temperature resistance, oxidation resistance, corrosion resistance, low cost, strong applicability, high purity, good crystallization, strong liquidity, low linear expansion coefficient , Corrosion resistance and other characteristics. In the application process has not detonated, not powder, no cracking, widely used in abrasive abrasive, refractories, sandblasting, grinding and polishing, wear-resistant floor of silicon carbide, precision casting mold shell production. Brown fused alumina sand can be made of sandpaper, emery cloth, grinding wheel, grinding stone, refractory materials, casting, anti-skid sand.

Green silicon carbide is the perfect material that specifically manufactured to be used for general abrasive applications in bonded abrasive tools, lapping and polishing processes.

Black Silicon Carbide Introduction



Because of the rarity of natural moissanite, most silicon carbide is synthetic. It is used as an abrasive, and more recently as a semiconductor and diamond simulant of gem quality. The simplest manufacturing process is to combine silica sand and carbon in an Acheson graphite electric resistance furnace at a high temperature, between 1,600 �°C (2,910 �°F) and 2,500 �°C (4,530 �°F). Fine SiO2 particles in plant material (e.g. rice husks) can be converted to SiC by heating in the excess carbon from the organic material. The silica fume, which is a byproduct of producing silicon metal and ferrosilicon alloys, also can be converted to SiC by heating with graphite at 1,500 C (2,730 F).