$Raw Materials for Refractory - High Purity Fused Mullite System 1$

$Raw Materials for Refractory - High Purity Fused Mullite$

$Raw Materials for Refractory - High Purity Fused Mullite System 1$

Raw Materials for Refractory - High Purity Fused Mullite

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Specifications

Fused Mullite :
1,high purity fused mullite
2,provide mullite with different grades and size

Description:

Mullite is a raw material with high heat resistance. At present, there are mainly high purity fused mullite, ordinary fused mullite, finely sintered mullite with all natural bauxite and caustic-burned mullite.

Mullite of Ruishi Brand is made of high quality pure natural mullite ore, melted from the advanced industrial furnace with high temperature. It is featured by uniform expansion, excellent thermal shock resistance, high softening point with load, low elevated temperature creep value, high hardness, good resistance to chemical corrosion etc.

Specification:

Mullite:

Specification	Item	Chemical composition(%)
Specification	Item	Al₂O₃	Si02	Zr02
AS-Ⅰ AS-Ⅱ AS-Ⅲ	Sintered	42-47 56-67 70-76	51-55 28-42 23-28	--- --- ---
AS-I AS-Ⅱ	Fused	60-70 70-77	25-35 22-29	-- --

Particle size :0-1mm/1-3mm/3-5mm/5-8mm;180mesh-0/320mesh-0

Packing: 1 MT big bag or 25kg paper bag *40 bags on one pallet ;

As per customer’s requirement

Advantages:

1.expansion uniformity

2.excellent thermal shock resistance

3.high load softening point

4.small high temperature creep value

5.high hardness

6.good resistance to chemical corrosion

FACTORY:

$High Purity Fused Mullite For Refractory$

Q: What's the fire endurance of fire windows?: That is fire resistance rating, fire-resistant time in the case of fire! It can be basically classified into the following levels and the fire endurance of the fire window is as follows as well: A class fire window: no less than 1.2h; B class fire window: no less than 0.9h; C class fire window: no less than 0.6h. This is in accordance with the latest specification of gb16809-2008 fire windows.

Q: What do we mean by saying that a ladle cover knots, elbow knots, blowpipe knots in refractory materials? What is the “knot”?: Blowpipe is also the construction of unshaped refractory materials. Refractory material for ladle cover is light weight heat insulation refractory material. What you said that the construction of bend out refractory materials in some steel mills called "knot".

Q: How to make use of waste refractory materials whose main elements are alumina and mullite?: Crushing and pressing refractory bricks, or refractory parts . Such as welding positioner tracks use disposable tools.

Q: Which schools are the best schools in the world for learning knowledge about refractories?: Wish it helps you out.

Q: Is aluminium oxide refractory material?: Yes. It has high melting and boiling point, stable chemical?property. All refractory material almost contains aluminium oxide. Refractory materials have a large range and need specific requirements. Refractory material is divided into sizing refractory material, shapeless refractory material, ceramic fiber, refractory bricks and castable refractory. It can be subdivided according to temperature rating. Hope it is helpful to you.

Q: What are the commonly used fire protection materials: Firewall. The fire wall is made of non combustible material, and is directly installed on the base of the building or the reinforced concrete frame or fire proof walls . Fireproof limit of the firewall, according to the current "building regulations", is 4 hours, wheras the specification of Technical specification for concrete structures of tall building is 3 hours. doors resistant to fire, heat in a certain period of time These door usually prevent the spread of fire and gas in the fire resistant wall, staircase, pipe well. Fire door can be divided into steel fire doors, wood fire doors and composite materials fire door according to the material used. According to the limit of fire resistance can be divided into the class A fire door (1.2h), B fire doors (0.9), class C fire door (0.6h); (3) fire window. Windows resistant to fire, heat in a certain period of time It is usually installed in the fire resistance wall or doors; the fire shutter. This roller shutter can be refractory in a certain period of time. It is typically used for heat and fire insulation in escalator with difficulties to install fire resistant wall, fire resistant valve and smoke resistant valve. Fire resistant valve is installed in the ventilation and air conditioning system of air supply and return air duct, usually in the open state, fire, It will be turn off when the pipeline gas temperature reached 70 degrees, can meet the requirement for fire resistance and insulation for gas and fire. Smoke fire resistant damper installed in the exhaust system pipe, when the pipeline gas temperature reached 280 degrees, it will close automatically, insulating fire and gas.

Q: What refractories can withstand high temperature above 2100 degrees?: It depends on refractoriness of refractory materials. The three refractory bricks above is 300 degrees higher than quartz sand in refractoriness. Magnesia brick: Cast corundum brick with greater than 2000 degrees refractoriness should be enough for you to use. But products like quartz sand merely keeps 1600 to 1700 in refractoriness generally. As you described that refractoriness is greater than 1990 degrees, it is feasible to use hearth made by mixing of quartz sand and refractory cement, which can work for some time at 200 degrees. It is also ok to use dolomite brick whose refractoriness is greater than 2000 degrees.

Q: Which region use more refractory?: Places with steel mill, such as Hebei Province, Anshan City of Liaoning Province, south of Wuhan, Shanghai, all of these places have steel mills where use various types of refractories. In addition, architectural material industry, such as cement plant and glass plant all use refractories, but the variety is single, with a large amount.

Q: What is the mechanism of the errosion of the iron to the refractories?: For example, the effect of the iron oxide: Mo corundum given temperature Fe2O3 solid solubility limit of the solid solution formed of corundum stone high solubility than the solid solution Mo Mo corundum lattice shape so Fe2O3Al2O3-SiO2-based material starts melting temperature of the system or the content of Al2O3 and Al2O3 / SiO2 ratio off Al2O3 / SiO2 & lt; 2.55 starting melting temperature of 1380 ℃ when Al2O3 / SiO2 & gt; 2.55 start melting temperature is increased 1460 ℃ and with its Al2O3 content increased gradually to increase the original atmosphere Fe2O3 original FeO off the solvent into the glass phase and the system starts melting temperature drops do not fall to 1240 ℃ 1380 ℃. Lower the melting point, increase the erosion, and reduce the life span.

Q: Refractory inquiries: Special refractories are new inorganic non-metallic materials developed on the basis of traditional ceramics and refractory materials.

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