Refractory grade White fused alumina higer Sodium

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White Fused Alumina ( WFA OR WA) is made from chemical by high furnace or tilting furnace at high temperature . it is very impor

White Fused Alumina

White Fused Alumina ( WFA OR WA) is made from chemical by high furnace or tilting furnace at high temperature . it is very important raw material for advanced refractory and abrasives. Its properties are as following :

Property

Size

0-1 1-2 3-5mm

Fine (mesh)

0-180 0-320

Spec

Typical Value

Spec

Typical Vlalue

a-Al2O3

99%Min

99.5%

99%Min

99.2%

SiO2

0.2%Max

0.08%

0.2%Max

0.12%

Fe2O3

0.2%Max

0.01%

0.25%Max

0.05%

Na2O

0.4%Max

0.23%

0.4%Max

0.30%

Principal crystalline Phase

a-Al2O3

Crystal systerm

Hexzagon

Color

White

True density

3.95Min

Bulk density

1.75-1.95

Mohs hardness

9

Size (mm)

85 53 31 10

Fine(Mesh)

-80,-120,-240,-320

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Q:What are the requirements on fire resistance period of C-level fireproof glass?
It can be classified into three types in terms of fire resistance, Class A: The fireproof glass which meets demands of fire integrity and fire insulation at the same time. This glass has advantages of excellent transmittance, fire-proofing(smoke resistance, fire insulation, and blocking heat radiation), sound insulation and impact resistance. It can be applied to architectural ornaments, fire resistant timber doorsets with steel structure, windows, upper beam, partition walls, daylighting roofs, ceiling screens, perspective floor and other building components which need transparency and fireproofing. Class B: The fireproof glass which meets demands of fire integrity and thermal radiation intensity at the same time. This glass is mostly composite fireproof glass which has advantages of transmittance, fireproofing, and smoke resistance. Class C: The fireproof glass which only meets demand of fire integrity. This glass has advantages of transmittance, fireproofing, smoke resistance and high intensity. It can be applied to fireproof glass partition walls, fire windows and with no requirements on outdoor curtain walls, etc. The fireproof glass can be classified as composite fireproof glass and single chip fire-proof glass in terms of structure.
Q:Can anyone tell me the requirements of the refractory masonry??
Kaolin is mainly composed of kaolinite crowded minerals that is in the shpe of tiny flake which is less than two microns, tube and folding flake. The kaolinite crowded mineral consists of kaolinite, dickite, pearl stone, halloysite, etc. and its ideal chemical formula is AL2O3-2SiO2-2H2O. The main mineral component of it is kaolinite and halloysite.In addition to the kaolinite crowded mineral, kaolin is accompanied by other minerals like montmorillonite, illite, pyrophyllite, quartz and feldspar. The chemical composition of kaolin contains large amounts of AL2O3, SiO2, and a small amount of Fe2O3, TiO2, and traces of K2O, Na2O, CaO and MgO, etc. The white pottery is made of kaolin. At present, the internationally accepted scientific name for kaolin is Kaolin which is derived from the kaolin mountain in the eastern suburb of kaolin village in Jingdezhen.Such special properties of kaolin as its plasticity,cohesiveness, certain dry strength, sinterability and firing whiteness make it the main raw material for ceramic production; properties like whiteness, softness, high dispersibility, and adsorbability allows it to be widely used the paper industry. In addition, the kaolin is also widely used in some industrial sectors such as rubber, plastics, refractories, oil refining as well as agriculture sector and cutting-edge technology for national defense. According to the purpose and requirements, kaolin can be processed and purified and it can be used to manufacture activated clay.
Q:Detailed description of magnesia dolomite refractory material?
The CaO of magnesia dolomite refractory is beneficial to the purification of molten steel. In the aspect of smelting clean steel, magnesia dolomite refractory also has good dephosphorization and desulfurization effect.
Q:What is fireproofing material? Are fireproof materials the same thing with thermal insulation materials and refractories?
Fireproofing material is inorganic board, while thermal insulation material belongs to organic board. Fireproof material can also preserve heat, but it is not as good as thermal insulation material in this aspect.
Q:Which one is the best refractory material?
Resin bonded refractory is mainly abot aluminum magnesium carbon, and carbonaceous etc. Thermoplastic resins need to add the coagulant (Uto), ageing mixture for a period of time, so the production cycle is long. Hot hard resin is relatively not so complex, but it’s not as good as thermoplastic resins in thermoplastic binding.
Q:How to calculate the thickness of choosing refractory? Such as steel ladle should choose what kind of refractory and using what thicknes?
I feel the concrete thickness should depend on the experience and the actual situation. As for the specific method, I also can't say too accurately. If it's ladle, it generally chooses alumina magnesia castable.
Q:How to make the service life of refractory materials longer?
Take acid resistant refractory materials as example: the atmosphere should be acidic atmosphere, if used in an environment whose temperature is 1900℃, it would exacerbate the loss of refractory materials, so don’t use overloaded. Second, select the appropriate refractory materials according to the environment. For example, if its operating temperature is 1800℃, generally speaking, the normal use of it according to the instruction of refractory materials would be fine.
Q:What are the classifications of refractory? Which category does steel ladle castable belong to?
In addition, it can be divided into refractory, shapeless refractory material. And it can also be divided into acidic refractory, basic refractory and neutral refractory. If you want to know more, you can ask thme. In fact, every company has different refractory clasifications. There are more clasifications in Huaheng.
Q:What is streaming fireproof material?
Since streaming fireproof material has less surface energy, so when it is placed in a location to be used, it can be automatically filled so long as mixed with water at proper ratio. And then using vibrator or vibrostand and other tools to compact the mixture so as to satisfy the use requirements. Therefore, it does not require vibration, and it has less friction force between the particles. Generally hydraulic refractory castable must be mixed with water at proper ratio when in construction . While, the concept of "streaming" is in terms of refractory castable.
Q:Why do magnesium oxide refractory bricks can be made into refractories?
Because the magnesium oxide, commonly known as magnesia, which is a basic oxide, with the common property of alkali oxides and belongs to the cementitious material . It is white or light yellow powder, odorless, tasteless, non-toxic and a typical of alkaline earth metal oxide, whose chemical formula is MgO. It is white powder, with melting point of 2852 ℃, boiling point of 3600 ℃ and relative density of 3.58 (25 ℃). The magnesium oxide that is soluble in acid and ammonium hydroxide solution has high insulation properity. After high temperature of above 1000 ℃ burning, it will transform into crystals, and when rising above 1500 ℃ , it will turn into dead-burned magnesium oxide (also known as the magnesia) or sintered magnesia. So the performance of magnesium oxide refractory bricks is good, and the fire resistance of it is very strong.

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