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.
Silica brick is an acidic refractory mainly composed of tridymite, cristobalite and a small amount of residual quartz and glass phases
The heavy part of the raw materials for the chrome zirconium corundum composite brick is sintered tabular corundum, high-purity chromium oxide, high-purity zircon, and Guangxi white cement.As the main raw material, the light part of the raw material is made of 47 mullite, kyanite, floating beads and coke gemstones as the main raw materials. During molding, a separator is set in the middle of the mold, and heavy materials and light materials are added at both ends. After high pressure molding , finished products made of high temperature sintering.
Silicon carbide used in industry is a synthetic material, commonly known as emery. Silicon carbide is one of the most commonly used non-oxide refractory raw materials in the field of 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.
silicon mullite brick is a kind of refractory brick product made of super high alumina bauxite and silicon carbide as raw materials through a special sintering process. It has the characteristics of continuously forming a protective layer and reducing ring formation, and its heat resistance is also very good. The softening temperature under load can reach 1600 ℃, and the service life is long. Mainly used in the transition zone, decomposition zone and cooler of small and medium-sized cement kilns.
Yuying Refractory produces a complete set of refractories for electrolyzers, and the new impermeable bricks are used in conjunction with impermeable castables
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