Raw Materials for Silicon Wear-Resistant Magnesite Refractory

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Specifications

1.High crushing strength
2.High hot strength
3.Good thermal shock resistance
4.Strong anti-stripping resistance

Characteristic:

High crushing strength
High hot strength
Good continuously forming protective layer during service
Good wear resistance,

Trademark		AZM-1 550	AZM-1650	AZM-1680
Item		Index	Index	Index
Chemical composition(%)	SiC+SiO₂	≥35	≥30	≥32
Chemical composition(%)	Al₂O₃	≥60	≥65	≥65
Volume density(g/cm³)		≥2.55	≥2.65	≥2.70
Apparent porosity(%)		≤20	≤19	≤19
Cold crushing strength(Mpa)		≥80	≥90	≥100
Refractoriness under load(T0.6,°C)		≥1550	≥1650	≥1680
Thermal shock resistance,time(1100°C,water-cooling)		≥10	≥15	≥20

1) Good performance to thermal shock, corrosion, erosion and abrasion resistance.
2) High refractoriness and excellent mechanical strength.
3) Both intermittently and continuously working mode are acceptable, reducing lining cracks.
4) Longer and stable life cycle to reach high efficiency.
5) Suit for all kinds of metal types, reduce residue and porosity of the products.
6) Labor and cost saving by convenient installation and maintenance

Q: How long can gypsum board endure fire?: General gypsum plaster board with a thickness of less than 12mm has a fire endurance which is less than half an hour. It is clearly stipulated in Clause 2.0.4 of "Specification of Fire-resistance of Decoration?Design in the Interior of Buildings" that "gypsum board, mineral?wool?board and acoustic board whose combustion performance reach at B1 grade installed on steel joists can be used as A-grade incombustible materials. Although the gypsum board is non-combustible material, we need to examine materials' stability in the face of fire and their fire retardant limits besides exmine their fire prevention standards. Fire retardant limit refers to the ability and time that materials can resist fire when encounting fire and taking palce changes.

Q: Who knows the model of fireproofing materials?: Models of fireproofing material: PC 6555 Bayer 6555 fireproofing PC 6557 Bayer 6557 fireproofing PC 6485 Bayer 6485 fireproofing PC 6385 Bayer 6385 fireproofing PC 6265 Bayer 6265 fireproofing PC 2865 Bayer 2865 fireproofing PC 4610 Dow 4610. Hope my answer will be helpful to you!

Q: How to distinguish between class A fire resistant door and class B fire resistant door from appearance ? What are the differences between the two refractories? Thank you !: First, the materials are the same. But the thickness of grade A and grade B fire doors is different juding from their appearances. Grade A :50. Grade B:45. Added question: Do you refer to steel fire door?

Q: What are the characteristics of the carbon composite refractories?: The features of carbon composite refractories: 1. It is with an aggressive high thermal shock resistance 2. Good resistance to molten steel and slag

Q: I would like to know if there is any requirement for refractories in the crucible type high-frequency smelting furnace Worry！ I hope you can help me! This time!: Stable chemical properties. The crucible material should not be hydrolyzed at low temperature. It is difficult to be decomposed and reduced at high temperature and is not susceptible to corrosion by molten slag and molten metal;

Q: what's the varieties of thermal insulation material with A level fire?rating?: the main A level fireproof material is rock wool now (note:it is rock wool not mineral wool). A1 level fireproofing, now the largest producer is Taishi rock wool Co., Ltd.; hope my answer can help you, thank you.

Q: I wanna ask what are the acidic refractories?: (1) silica?brick with stronge acidity, unshaped silicious refractory, quartz glass and fused silica combined products; (2) semi-silica refractory with moderate acidity and pyrophyllite refractory; (3) clay-based refractory with weak acidity.

Q: What kind of material is refractory bauxite?: Bauxite (aluminous soil; bauxite), also known as alumina or bauxite ore whose main component is alumina oxde, is a hydrated alumina containing impurities. It is an earthy mineral. It is white or gray, and as it contains iron, it is also brownish yellow or light red. Density of 2.4-2.5g / cm3, hardness 1-3, opaque and crispy. It is extremely difficult to melt.

Q: what should be paid sttention when buying the refractory?: solve the resources and the cost as much as possible. Accurate understanding and knowing the material temperature changes of various partsin order to choose the appropriate refractories. 4： 3, work performance, for example, take measures to ensure the overall life, and it is a very good buying principles: melting in high temperature metal erosion. These are the four major problems to consider when using refractory. You can choose low prices and low transportation costs of materials to meet the basic principles under the conditions described above. 2.carefully observe the material to prevent the desturction and reducing the costs. according to the structure of furnace, reasonable coordination of all parts of the material, fully take the advantages of material characteristics and strive to develop the recycle, to avoid the destruction of the materials.1. the working characteristics and the sport condition and analyze the reason of destroying the material, which can not only gurantee the product quality and reduce the expenses, get familiar with the chemical component and physics of the material.

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.

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