Dead-burned Magnesite,Dead Burnt Magnesite

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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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Product Description:

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 magnesiteDead-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.

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Q:What's the A grade fireproofing material?
A grade fireproofing material: 1. fire-proof plate; 2. fireproof wooden door; 3. fireproof wooden window frame; 4. fire resisting shutter; 5. fireproof and mothproof wood; 6. fireproof glove compartment; 8. fire retardant coating; 9. fire-proof sealing material.
Q:What's the definition of fire endurance of the fire-resistant coating for steel structure?
1. Fire endurance. Conduct fire resistance test of any building component according to the standard time-temperature curve, and the time when it is subjected to the fire to the time when it loses support capability or fire insulation function or its integrality is destroyed is referred to fire endurance. 2. Steel has relatively low fire endurance which is usually 0.25h only, namely 15 minutes; 3. Of steel structure buildings, steel can be used as beams, pillars, etc. but its fire endurance is not enough (usually these components have higher requirement on fire endurance, and take pillar as an example, it is usually demanded that the fire endurance should be 2-3h), and under this condition, it needs to brush fire retardant coating so as to raise the fire endurance. As to the specific quantity or types of the fire retardant coating, it is decided upon the actual conditions. In short, the building material needs to meet the required fire endurance of the buildings.
Q:I wanna ask what are the acidic refractories?
Usually, acidic refractory refers to a kind of refractory which contains a amount of silicon dioxide. There are the following: (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. The main features of the acidic refractories is resistant to the erosion of acidic substances (acidic residue) in high temperature, but is easy to react with alkaline material (basic slag). zirconite fireproofing material and silicon carbide as the special acidic refractories refractories are also in this category.
Q:What's the fire endurance of A grade fireproof glass curtain wall?
The following is fire endurance of A class fireproof glass curtain wall. Fire endurance of the fire window: 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. Technical requirements: 1. Materials and fittings: (1) Window frame should adopt the steel frame or wood frame with certain strength so as to guarantee the integrality and stability of the fitting; (2) Steel frame and mound layer can choose the galvanized steel sheet or stainless steel sheet. Its selection standard is in line with provisions of Article 5.1 in GB12955 "General Technical Requirements on Steel Fire Doors"; (3) Selection standard of wood frame and mound layer should be consistent with the provisions of Article 5.1.1 in GB14101 "General Technical Requirements on Wood Fire Doors"; (4) Filler material inside the steel frame and wood frame should be incombustible material; (5) Fireproof glass can choose the qualified product with no influence on the fire resistance test of the fire window, and its light transmittance should be no less than 75% of that of the ordinary sheet glass with the same layers; (6) Sealing material between the frame and the fireproof glass should use flame retardant material which can play the role of fire prevention and smoke insulation in case of fire. Hope it's helpful for you.
Q:How to distinguish the fire rating of rubber and plastic thermal insulation material?
It is divided into level A, B1, B2 and B3. According to the current "burning behavior of building materials classification method", Level A insulation material is a non-combustible material, which belongs to YT. However, from the point of view of the current market , level A insulation material are very few, only glass wool, rock wool board, foam glass and vitrified micro bead. However, compared with level A insulation material, the more welcomed by the market is the organic insulation material. This is characterized as thermal insulation material, which is divided into three levels: level B1 is flame retardant, level B2 is flammable and level B3 is flammable. The level B1 nonflammable thermal insulation material is determined according to the fire endurance of the material. And different parts of the material are divided differently! Such as the common EPS / XPS insulation boards through special treatment of adding flame retardant. . Level B2 combustible insulation material is commonly the EPS expanded polystyrene foam insulation board and XPS board, that is, the ordinary plate. This material has low ignition point, and releases large amounts of harmful gases in the combustion process . Level B3 flammable insulation material is commonly the thermal insulation material taking polystyrene foam as the main material. Since this material is highly flammable, it has been out of the external wall thermal insulation materials. As for the civil construction insulation materials, China's current popular building insulation materials in the market are mainly made of three organic foams: EPS (molded polystyrene board), XPS (extruded polystyrene board) and PU (polyurethane).
Q:Procedures for producing common refractory materials?
The general procedures of producing refractory materials include calcination of raw materials, selection of raw material , crushing, grinding, screening, mixing, ageing mixture, molding, drying, burning and etc. At present, the refractory factory usually purchases the calcined clinker, so the calcination of raw material is no longer a consideration of common refractory plants.
Q:I want to consult the fire resistant level standards of external wall thermal insulation materials.
Fire resistant level standards of external wall thermal insulation materials: 1, The thermal insulation material that has A-class combustion performance: Spraying inorganic fiber, glass wool, foam glass, ceramic foam, rock wool, foam cement and perlite obturator, and so on. 2, The thermal insulation material that has B1 level combustion performance: Special processed extruded polystyrene board (XPS) / special processed polyurethane (PU), phenolic and polystyrene powder. 3, Thermal insulation materials that have level B2 combustion performance: Molded polystyrene board (EPS), extruded polystyrene board (XPS), polyurethane (PU), polyethylene (PE), etc.
Q:Is the refractory reached British BS standard and used for cables in China at present ceramic silicone rubber?
Which standard? Please be more specific
Q:What's the difference between refractory metal raceway and fireproof raceway?
In terms of fire protection, fireproof raceway means that it is composed of the material with certain combustion performance and generally made of flame retardant or incombustible material. While for the refractory raceway, according to GA 479-2004 "Fire Resistant Cable Tray", its most important properties are: Fire resistance of the cable tray should meet with the following requirements: The cable tray of I grade fire resistance should keep the working time more than 60min, of II grade fire resistance should keep the working time more than 45min, and of III grade fire resistance should keep the working time more than 30min. Hope this is helpful for you! Thank you.
Q:What are unshaped fire-resisitance materials?
Refractory castable, refractory plastic material, usually classified according to construction and manufacture method, unfired bricks precast block, refractory pressed into material, refractory cast material, refractory coating, refractory ramming material there are many classification methods

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