Dead-Burned Magnesite Raw Materials for Refractory

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Loading Port:: China main port

Payment Terms:: TT or LC

Min Order Qty:: 25 m.t.

Supply Capability:: 2000 m.t./month

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Quick Details

Place of Origin:	Liaoning, China (Mainland)	Shape:	Block	SiO2 Content (%):	3.5-7.0
MgO Content (%):	87-92	CaO Content (%):	1.6-5.0	Model Number:	M-DBM
Brand Name:	CNBM

Packaging & Delivery

Packaging Details:	10-25kilogram 5 layers craft paper bags, the craft paper and plastic compound bags; 40-50 kilograms PP bag, 500 and 1000 kilograms PP bag packing. We can also pack according to users' requirements
Delivery Detail:	Within 1 month

Specifications

1.High purity Large crystal grain Compact structure
2.Strong resistance to slag material
3.Good thermal shock resistance

Dead-burned magnesite is selected from natural magnesite, it is produced by mine-selecting, purifying, calcining in shaft kiln. It is an ideal material for unshaped refractory material, the final products are used in open hearth furnace, eletric furnace bottom and furace's lining tamping.

Details are as follows:

Dead-burned Magnesite,dead burnt magnesite

Our company has processed various kinds of magnesia. As 20 years passing, our products of magnesite are widely used in many industrial fields of areas the world. Any question, please feel freely to contact us.

Dead-burned Magnesite,dead burnt magnesite

Magnesia is divided into sintered magnesia, light burned magnesia, fused magnesia three categories.Magnesia refractory material is one of the most important raw materials, aluminum used in the manufacture of all kinds of magnesite brick, magnesite brick, ramming material, repairing, etc.Contain a more impurities, are used to construct steel furnace bottom, etc.Sand in the main ingredients for magnesium oxide, impurities such as CaO, SiO2, Fe2O3, magnesium oxide as basic oxide, melting point is 2800 degrees, after the high temperature heating into stable cubic crystal, commonly known as periclase.By magnesium hydroxide by high temperature calcination, hydration resistance ability.Sintered magnesia is mainly composed of magnesite, magnesite or water from the water extract of magnesium hydroxide by high temperature calcination.Hydration resistance ability.Magnesite calcination under 700-950 ℃ is escaping CO2, magnesite as soft porous loose material, cannot be used for refractory material;Magnesite through 1550-1600 ℃ calcination so-called burned magnesia said sintered magnesite.Light burning magnesium powder is bending, compression, high strength, hard, gelled material, widely used in national defense, medicine, chemical industry, paper making, shipbuilding and other industries.In the building materials industry produce tire sub board, particle board, heat preservation columns, railing, artificial marble, asbestos tile, ordinary tiles, wall panel, laying on the ground.With the progress of science and technology, light burning magnesium powder application more widely, civil products, light and heavy machinery packing boxes, packaging can do sill, high-temperature refractory material, also can make beautiful luster strong furniture, in the machinery industry to do model.

Q: How is grade of fire endurance divided?: Fire resisting shutter is divided into Class A / B / C, and the relevant fire endurance are not less than 1.2 /0.9 /0.6 hours, see "General technical conditions for steel fire resisting shutter GB 14102-93". 4.3 4.3.1 Classification according to time of fire resistance 4.3.1 Ordinary steel fire resisting shutter (see Table 3) Table 3 and Category Code Refractory time hF1 1.5F2 2.04.3.2 Composite steel fire resisting shutter (see Table 4). Table 4 and Category Code Refractory time hF3 2.5F4 3.04.4 Classification according to refractory time and smoke prevention performance 4.4.1 Ordinary steel fire and smoke resisting shutter (see Table 5) Table 5 category and code refractory time h smoke leakage (20Pa differential pressure) FY1 1.5 ≤0.2m3 / m minFY2 2.0 ≤0.2m3 / m min4.4.2 composite steel fire and smoke resisting shutter (see table 6) table 6 category and code refractory time h smoke leakage (20Pa pressure) FY3 2.5 ≤0.2m3 / m minFY4 3.0 ≤0.2m3 / m min Excerpt completed. Fire shutter used as fire compartment has a fire resistance of 3 hours, and fire shutter set on the upper opening part on the firewall has a fire resistance of 1.2 hours. **** Materials with fire resistance of 3.0 hours are called AAA refractory material (back fire surface). "Building Conventions" have mentioned in places where it is really difficult to set a firewall, fire shutters can be used to separate fire compratment. When using fire shutters whose back surface temperature rise is included as the judging criteria of fire resistance, its fire resistance should be not less than 3.00h; When using fire shutters whose back surface temperature rise is not included as the judging criteria of fire resistance, independent protection of closed automatic water spraying system should be set on the both sides of the shutter, and the duration of water spray should be not less than 3.00h. In summary: Fire shutter is divided into: Grade AAA, A, B and C

Q: What's the function of aluminium dihydrogen phosphate on the refractories?: Mainly used for binder of high-temperature furnace refractory. Characteristics of liquid aluminum dihydrogen phosphate, castable. solid used for refractory spraying coating, chamotte, ceramic construction, which has high break resistance after being dried in 350-500 ° C, phosphate bricks. Characteristics of the solid aluminum dihydrogen phosphate, binding agent used for castable and casting industry: together with the refractory aggregate, ramming mixes at room temperature: Easy to mix, crush resistance, hydration resistance, chamotte, will not become soft even if soaked or boiling in water, molding. Liquid use refractory spraying coating, mainly used for corundum, chrome corundum water gap in refractory industry. The production of chrome aluminum zirconium corundum brick for water-coal-slurry gasifier is especially suitable for site construction applications mainly used for the electrical industry, high-temperature kiln and furnace, hardener, after mixing between 90-110 ° C for 4-24 hours at a constant temperature, forming strong bonding strength, electrical insulation, heat treatment resistance furnace

Q: What is the function of refractory in ceramics?: In addition, the quality of refractory determines the finish and color of ceramic glaze.

Q: Which are fire proofing thermal insulation materials?: Which are fire proofing thermal insulation materials? Which fire proofing thermal insulation materials are commonly seen?

Q: How long is the fire endurance of the rock wool board?: The rock wool board takes the basalt as raw material and is processed into artificial inorganic fiber through high temperature melting, which is light in weight, non-combustible, heat absorptive, small in thermal conductivity. The initial development in construction is a common type of application used for industrial buildings, which should be consistent with the requirements of "building insulation application categories and basic requirements" . In June 1981 the pre-launch succeeds. The rock wool board is a new type of insulation, burning compartment and sound-absorbing material. Generally the fire resistance of the rock wool board is 140-180 degree within two hours, It is best not to exceed this safe period, in order to avoid security risks.

Q: How many grades of fire?rating are there for interior decoration materials?: It can be divided into construction classification and fire resistance rating. Fire prevention for buildings. Fire prevention measures should be taken in the architectural design to prevent fires and reduce fire hazards to life and property. Building fire protection includes two aspects: fire prevention before fire disaster and measures in fire disaster, among which the former is mainly to confirm the fire resistant rating and fire-resistant structure.

Q: What parts of cement kilns are refractories used on?: In kilns.

Q: Are refractory materials and fireproofing materials the same?: Refractories are generally used in the industry such as power plants, electric stove and industrial furnace. They include refractory bricks and insulation materials. Fireproof materials are generally used in building and they are fireproofing.

Q: who knows the fire endurance of fireproof coating?: fireproof coating of different thickness differs in its fire endurance. Let me intrduce you as follows: The amount of time of 0.5 hours refractory thickness 0.45mm 0.79kg / m21 hr 0.9 mm 1.5kg / m21.5 hour 1.4 mm 2.3kg / m22 hr 2.0 mm 3.3kg / m22.5 h 2.8 mm 4.6 kg / m2

Q: Is it normal for caable fire resistant material to catch on fire?: Abnormal; aging is certainly one of the cause of the fire. That is caused only because of poor insulation and aging caused by short circuit, but a more important reason is configuration of air switch does not meet the requirements. If the capacity of air switch equals that of the cable, trip will happen at the moment when current is overloaded, not causing a short circuit or over current fire.

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