Under 325 Mesh Calcined Alumina Powder AL2O3

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Product Description:

Under 325 Mesh Calcined Alumina Powder AL2O3


The main material of our refractory castable high alumina powder  is Al2O3—SiC—C, there’s 2 types including baking casting material and free baking material, the width of iron runner is required above 2.4 meter, the depth is above 1.7 meter,it has a good performance in site operation, with easy repair, tapping iron is allowed after pouring finished. Although the invest is more higher for once time, but it will be with a longer service life and a few mending work. Refractory castable is the production and the most widely used a monolithic refractories.



It can be used to formulate unshape refractory material; expansive cement, self-stressing cement, addition material of chemical construction material and projects with special requirements.


aluminum oxide property:

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 .

white fused alumina grits&powder chemical composition


aluminum oxide property:

Soluble in water white solid. Odourless. Tasteless. Qualitative very hard. Easy absorption of moisture and not ChaoXie. Both sexes oxide, soluble in inorganic acid and alkaline solution, almost insoluble in water and the polar organic solvents. The relative density (d204) 4.0. Melting point about 2000 °C.


The physical and chemical analysis:


 Under 325 Mesh Calcined Alumina Powder AL2O3


Main standard:

Alumina(industry grade) made by slkali-lime sintered,It is white powdered crystal with low assay of Ti, Mn, Zn, Cu, V, Zr, Cr, Li, Pb, B, P, etc.It is used in the production of fused salt eletrorefining aluminium, corundum eramics, refractories and other alumina chemical products.


Product Pictures:


Under 325 Mesh Calcined Alumina Powder AL2O3

Under 325 Mesh Calcined Alumina Powder AL2O3

Under 325 Mesh Calcined Alumina Powder AL2O3

Under 325 Mesh Calcined Alumina Powder AL2O3

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Q:Can quantitative feeder be used in refractory plant? Thank you
Well, can the Weifang Sanyou automation equipment production chain plate feeder is fully applicable to the measurement and control of boring high temperature, chain plate feeder with 16 4-5MM manganese plate.
Q:What is the quote of fireproof and soundproof materials used in KTV?
1. fire retardant, sound absorbing sheet,eggs,pyramid,sound-absorbing material, piano room, studio, KTV, with glue on the rear, 15 Yuan 2. bar, KTV, fireproof sound insulation cotton, sound-absorbing materials, studio, eggs, drum practice room, sound-absorbing and sound insulation materials, pyramid, 25 Yuan 3. fireproof wood excelsior absorbent, sound absorbing board, wall ceiling decoration materials, materials, theater, KTV, wood color fiberboard, 30 Yuan.
Q:Development trend of refractory industry
China announced that from 2004 January, the export of most refractory raw materials will be cancelled, and the export of finished products will also reduce the tax rebate rate. This means that important raw materials for further export restrictions, some developed countries dependent on imports of China's refractory materials and products of the refractories industry will have a major impact. In order to reduce costs, they will move their factories to Chinese, which is the development of Chinese refractories industry will also be an important opportunity. In addition, the convenience of communication and transportation, the change of the international market and the increase of e-commerce have also brought good opportunities to the development of refractory industry.
Q:what are the types of piping insulation material fire rating?
There are two grades: 1, the organic material: Grade B Grade B1 hard combustion (fire retardant) 2, inorganic materials: class A no burning it is divided into three levels, attributed to the types of materials!
Q:Which industry does refractory belong to?
It belongs to decoration industry.
Q:What refractories are accessible with ease in daily life? This material is suitable as a disposable mold and crucible for melting brass.
There are many refractories in daily life. Such as the lining of furnace! And refractory cotton ... If you want to melt brass, you need to resort to professionals! It's rare in daily life to find out those molds that can be made by ourselves. You can buy a corundum crucible in the neighbouring laboratory equipment market! Remember that brasses' melting point is at above1000 degrees, so the material must have refractoriess of 1000 degrees.
Q:What is the particle size of boron carbide for refractories?
Ask, in the electric furnace magnesia carbon brick, boron carbide amount how many? Thank you The service temperature is around 1600.
Q:What are the standards of refractory concrete ?
Refractory concrete is generally divided into three categories: Light insulating concrete (for insulation); medium-quality refractory concrete (It is used for the parts where requirement of refractory temperature is not very high, and it can withstand a certain erosion of air); heavy refractory concrete (It is used for the parts where requirement of refractory temperature is fairly high, and it can withstand a certain intensity of erosion of air). It mainly depends on the design temperature and the using parts. There are a variety of raw materials, of which aluminum oxide is one of the most commonly used materials, others are alumina hollow ball, magnesium oxide, zircon, etc. It depends on the design temperature and the parts on use. Commercial concrete station generally can not produce it, instead it is compound by professional refractory concrete factories.
Q:How many types of fire-resistant material?
1. Acid fire-resistant material refers to one with more than 93% SiO2. It is featured by resistance to the corrosion of acidic slag ad high temperature and easy to react with alkaline molten slag. 2. Alkaline refractory material generally refers to one with magnesium oxide or magnesium oxide and calcium oxide as the main component. It has high refractoriness and strong resistance to basic slag. 3. Silicate aluminum refractory material refers to one with SiO2, Al2O3 as the main component. According to the content of Al2O, it can be divided into three categories: half siliceous (15-30% Al2O3), clay (Al2O3 30 ~ 48%), high aluminum (more than 48% of Al2O3). 4. Fused cast refractory material refers to shaped refractory products made by high temperature melting and casting.
Q:How to determine the fire resistance rating of the aluminium-plastic panel?
Class A incombustible and thermal insulation material: inorganic active wall thermal insulation material, cement foam insulation board, glass bead thermal mortar, rock wool board, glass wool board, foam ceramics, etc. With many characteristics of low density, low thermal conductivity, high pressure bearing capacity, convenience of construction, economy and durability, A class incombustible material is widely used as thermal insulation material for heat pipelines, thermal equipment, other industrial pipe-line equipment and industrial buildings, and thermal insualtion and sound absorption material for the building envelop of industrial and civil buildings. Because of good thermal stability, it is more often used as fire-proof and protective coating material of the steel structure.

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