White corundum is made from industrial alumina powder, which is smelted in an arc at a high temperature above 2000 ℃ and then cooled. After crushing and shaping, magnetic separation to remove iron, it is divided into various particle sizes.
White fused alumina for refractory material
White corundum is made from industrial alumina powder, which is smelted in an arc at a high temperature above 2000 ℃ and then cooled. After crushing and shaping, magnetic separation to remove iron, it is divided into various particle sizes.
Its texture is dense, high hardness, and the grains form sharp angles. It is suitable for the manufacture of ceramics, grease-bonded abrasive tools, grinding, polishing, sandblasting, precision casting (corundum for fine generals), etc. It can also be used for manufacturing advanced refractory materials. The code "WA" is consistent with international general standards and national standards. Most of them are for export, and a certain amount is also supplied to domestic users.
Product granularity is produced according to international standards and national standards, and can be processed according to user requirements. The general particle size number is F4~F220, and its chemical composition varies depending on the particle size. The outstanding feature is that the crystal size is small and impact-resistant. If it is processed and broken by a self-grinding machine, the particles are mostly spherical particles, the surface is dry and clean, and it is easy to bond with a binder.
The density of white corundum is divided into two types, one is the bulk density of white corundum, and the second is the density of white corundum. The bulk density is 1.53~1.99g/cm3, and the bulk density of the abrasive is related to the particle size of the abrasive, the composition of the particle size, the variety, the particle shape and other factors. Generally speaking, the bulk density of coarse-grained abrasives is larger than that of fine-grained abrasives, and the bulk density of mixed-grained abrasives is greater than that of single-grained abrasives.
|
Project |
particle size range |
Al2O3%≥ |
Na2O%≤ |
|
WFA |
0-1，1-3，3-5mm |
99 |
0.60 |
|
WA and WA-P |
F4~F80 P12~P80 |
99.10 |
0.35 |
|
F90~F150 P100~P150
|
99.10 |
0.40 |
|
|
WA and WA-P |
F180~F220 P180~P220 |
98.6 |
0.50 |
|
F230~F800 P240~P800 |
98.30 |
0.60 |
|
|
F1000~F1200 P1000~P1200 |
98.10 |
0.70 |
|
|
P1500~P2500 |
97.50 |
0.90 |
|
|
WA-B |
F4~F80 |
99.00 |
0.50 |
|
F90~F150 |
99.00 |
0.60 |
|
|
F180~F220 |
98.5 |
0.60 |
Characteristics of white corundum raw materials:
White corundum is made of high-quality aluminum oxide powder as raw material, which is refined and crystallized by electrofusion. It has high purity, good self-sharpening, acid and alkali corrosion resistance, high temperature resistance, and stable thermal performance; its hardness is slightly
It is higher than brown corundum, with slightly lower toughness, strong grinding ability, low calorific value and high efficiency; it can be used to make abrasive tools, which can be used for grinding fine-grained materials such as high-carbon steel, high-speed steel and stainless steel. Can be used for precision casting and advanced refractories.
Brown corundum is made of natural bauxite as raw material, carbon (mainly coke) is used as reducing agent, and iron filings are added as sedimentation agent (clarifier) to form ferrosilicon deposited on the bottom of electric furnace.
Brown Fused Alumia powders are fused wIth premium raw materials and 3500 KVA furnace. It is perfect material specifically manufactured to be used for general abrasive applications in bonded abrasive tools, polishing and sandblasting grit. It has lower hardness and abrasive capacity than diamond, boron carbide, and silicon carbide, it is widely used for grinding ferrous materials, finishing tough and hard materials. It is also be used as high-class refractory materials. Brown Fused Alumia is offered in macro and micro powder form, in both F and P grades.
The refractory ramming material is prepared from a high proportion of granular and powdery materials and a very low proportion of binders and other components, even all of which are composed of granules and powders, and are subject to strong ramming. Bulk materials for construction.
Corundum refractory castable has the characteristics of high strength and good fluidity, which is convenient for construction. It is mainly used for the parts that are easy to be washed and worn, such as the combustion chamber, separator and flue of circulating fluidized bed boiler.
Refractory carstables for ladles is made of high-purity fused corundum as the main material, high-purity spinel is added to the matrix, and an appropriate amount of binder and admixture (dispersant, water reducing agent) are added.
GONGYI YUYING REFRACTORY CO.,LTD is located in GONGYI ZHENGZHOU CITY HENAN province,which is one of the main refractory production bases in China. Main products include different kinds of refractory brick and refractory material :Such as Fire Clay Brick, High Alumina Brick, Light Weight Insulating Brick,expanded clay,ceramic fiber blanket,rock wool products etc.They are widely used in Iron and steel, Nonferrous metals, BuildingMaterials(Cement,Glass,Ceramic), Petrochemical, Energy & Incineration etc industries.
Insulating high alumina refractory bricks mainly refer to refractory products with an aluminum content of more than 48%. They are also called lightweight high-alumina bricks or heat-insulating high-alumina bricks due to their advantages of low bulk density, light weight, and good heat insulation effect. . It is a kind of thermal insulation refractory brick commonly used in high temperature industrial kilns and thermal equipment.
The high-alumina refractory bricks sold by Yuying refractory manufacturers are commonly used refractory bricks with high thermal stability and refractoriness above 1770°C. It has good slag resistance and is used for the lining of steelmaking electric furnaces, glass melting furnaces, cement rotary furnaces, etc.
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