White Fused Alumina Grits

White fused alumina is made from high quality alumina by being melted above 2000°C in the electric arc furnace. It is characterized by high purity, great self-sharpening, acid and alkali resistance, high temperature resistance and stable thermal performance. Its hardness is a little higher than brown fused alumina. It is with low toughness, great grinding ability, small heat and high efficiency. White fused alumina can be made into all kinds of abrasives, suitable for grinding high carbon steel, high speed steel, stainless steel and other fine-grained abrasives; it can be also used for precision casting and high-refractory materials.

White fused alumina in arc furnace with high grade processed alumina as raw materials. It has higher hardness and slight lower toughness comparing with brown fused alumina.

It is also characterized by its high purity, ability of self-sharpening, better cutting, less heat emit, higher efficiency, acid and alkali resistance, good thermal stability.

As the abrasive materials, it is suitable for grinding high-speed, high carbon steel, as loose grains, it widely used for bonded and coated abrasives, polishing, precision casting and so on.


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Brown fused alumina melt film precision casting sand is based on the production of the brown fused alumina and with special technology, it is produced by the careful organization of the researchers. The quality has reached the advanced level of similar foreign products through laboratory tests and production in practice of dozens of casting enterprises. And some performances of it can be adjusted or showcased according to the customers requirement. The precision casting sand with high refractoriness, low thermal expansion coefficient, good thermal stability, strong air permeability, high intensity, easy to shell, high casting finish.It can substitute Zirconia sand (powder) its price is only half of zirconia sand (powder), and the recovery ratio is high as well. It can be mainly applied to the melt films and silicasol technology of jewelry, handicrafts, stainless steel products, watches, glasses, aluminum die casting industries, and can be processed in line with the demands of the clients.

Introduction:
Product description
White fused alumina
Our wfa grains are produced from high purity calcined or feedstock alumina in electric arc-furnaces. The molten material undergoes cooling, crushing, grinding, sieving, classifying and, of course, various quality checking procedure before it is packed for delivery.
White fused alumina product uses
White fused alumina is widely used in the refractory industry as it is a very pure low iron alumina suitable for a range of applications. Specific refractory applications include high tech refractory castables, isostatic pressed refractories and pre-cast refractory shapes. The benefits of white fused alumina in these applications are that it has a very high alumina content, low impurities and stability at high temperatures.
White fused alumina typical properties

Brown fused alumina slag-fesi
During fusion process of brown fused alumina, the iron and metal content(mainly ferro and silicon)settle at the bottom of the arc furnace because of their higher density. After cooling down, it seperated from brown fused alumina whose content is aluminium oxide(al2o3). We select the settled metal part, crush and grade it into grains suitable for various industrial purposes. Its main content is ferro and silicon and can replace some fesi. We call it brown fused alumina-fesi. So the manufacturing process of brown fused alumina slag fesi is different from normal fesi.

Because silicon is easy to react chemically with oxygen to become silicon oxide, it is used as deoxidizer in steel making industry. Silicon oxide(sio2) also produce a lot of heat, so can improve the temperature of steel. Fesi is also widely used in low alloy structural steel, spring steel, bearing steel, heat resistant steel etc. Its ferro content is typically 76%-80% and silicon content 13%-17%. Sizes can be made according to customer quest, common sizes are 0-10mm, 0-25mm etc.

Applications of brown fused alumina slag-fesi

Because of its hardness, it's used for sand blasting, rust removal, cleaning, polishing etc.
Deoxidizer in steel making industry to improve strength, hardness and density of steel.
Used as inoculant to help graphite precipitation
Used as reducing agent in steel alloy industry.
Newly development products like mineral processing, lithium ferro battery etc.

1. Description
White tabular alumina is a kind of pure sintered corundum, which is sintered and completely shrink without adding any additive, such as mgo or b2o3, with coarse crystals and well-developed alpha al2o3 crystal structure. The tabular crystal structure is characterized by narrow pores, with more closed porosity, almost the same apparent porosity compare with fused corundum, high purity, good stability volume density, tiny refiring shrink. After high temperature treatment, tabular alumina is used for refractory and castable characterized by good thermal shock stability and flexural strength. But the price is higher than the other alumina.

2. Performance
Tabular alumina is characterized by good heating volume temperature performance and good thermal shock resistance.

3. Usage
Tabular alumina is the perfect refractory raw material, which is widely used as the aggregate for producing various alumina refractory, it also can be used in other monolithic refractory. It can replace fused alumina and white fused alumina in some application position, and improve the performance of refractory material.

4. Chemical & typical physical properties
Chemical compositions
Al2o3 99.20%min
Sio2 0.20%max
Fe2o3 0.20%max
Na2o 0.40%max
Bulk density g/cm3 3.50min
Absorbing water rate 1.5%max
Porosity rate 5.0%max
Temperature 1960 degrees celsius
Grain size mm 8-5mm, 5-3mm, 3-1mm, 1-0mm
Fine powder mesh - 220mesh, -325mesh


1, high purity al2o3, 99.20%
2, pure sintered corundum
3, for refractory bricks and casting
4, supply all the size 8-5mm, 5-3mm, 3-1mm, 1-0mm, -325mesh

ight lower toughness comparing with brown fused alumina. It is also characterized by its high purity, acid and alkali resistance, good thermal stability. It¡¡¥s the high grade refractory materials.

Applications
Dedicated lines produce products for different applications. White fused alumina is highly friable and hence used in vitrified bonded abrasives products where cool, fast cutting action is essential and also in the manufacture of high purity alumina refractories. Other applications include use in coated abrasives, surface treatment, ceramic tiles, anti-skid paints, fluidized bed furnaces and skin / dental care.


Specifications

Items Unit Index Typical
Chemical composition Al2o3 % 99.00min 99.52
Sio2 % 0.20max 0.11
Fe2o3 % 0.10max 0.07
Na2o % 0.40max 0.23
Refractoriness ¡æ 1850min
Bulk density G/cm3 3.50min
Mohs hardness --- 9.00min
Principal crystalline phase --- |¨¢-al2o3
Refractory grade Grain Mm 0-50, 0-1, 1-3, 3-5, 5-8
Fines Mesh -200, -325
Grit (f grade and p grade) Fepa 16, 24, 46, 100, 180, 220














Ton bag

Products Name: Pure Aluminum A7 Ingot 99.9%
Chemical Composition: Al
Weight: 20/25kg
Al (Min): 99%-99.9%
Appearance: silvery white

Aluminum ingot for remelting is produced by molten salt electrolysis method using alumina and cryolite. Products meet the national standard GB/T1196-2002. The surface of ingot is clean and smooth.

Item: A7 Aluminum ingot 99.7 high quality
Standard: GB/T 3190-2008 JIS H4040:2006 JIS H4001:2006 ASTM B221M:2006 ASTM B209M:2006 ISO 209:2007(E) EN 573-3:2003 etc.
Material: 1000 Series
Size: Thickness:0.1-200mm,or as requiredWidth:0.1-2000mm,or as required Size can be customized according to customer needs
Surface Bright, polished, hair line, brush, sand blast, checkered, embossed, etching, etc.
Application: mainly used for melting ingot; discontinuous melting with scrap; easy control and operation; fast melting; Used for industry such as automobile, pinning and weaving, electron broadly and so on .
Export to: Worldwide etc.
Package Standard airworthy export packaging: wooden pallets with plastic protection or according to customer requirements

Packaging Details: Packing 25KG/INGOT, 1000KG or 1050KG/bundle, or as your requirement

AL Fe Si Cu Ga Mg Zn others Total
99.9 0.07 0.05 0.005 0.02 0.01 0.025 0.016 0.01
99.85 0.12 0.08 0.005 0.03 0.02 0.03 0.015 0.15
99.7 0.2 0.1 0.01 0.03 0.02 0.03 0.03 0.3
99.7 0.2 0.12 0.01 0.03 0.03 0.03 0.03 0.3
99.6 0.25 0.16 0.01 0.03 0.02 0.03 0.03 0.49
99.5 0.3 0.22 0.02 0.03 0.05 0.05 0.03 0.5
99 0.5 0.42 0.02 0.05 0.05 0.05 0.05 1