Special Electrically Fused Magnesia
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Fused magnesite sand are manufactured by high purity caustic calcined magnesite through electro-fusing,a part of SiO2,moves to the surface because of the huge difference in the specific which well grown crystals,well crystal perfection and structure homogeneity,excellent chemical stability,good corrosion resistance to slag and high stength at high temperature.it is main raw .material for manufacturing magnesia or magnesiacarbon Bric refractories.The manufactures are mainly used in regenerative chamber in the large scale glass furnace by floating method,electrical furnace,convert furnace,house hold electrical appliances as electrical insulating materials and so on...
Fused Magnesite (Ordinary Grade)
Fused Magnesite (Ordinary Grade) is manufactured through fusing high quality raw magnesite in electric arc furnace with the characteristics of big crystal, dense structure and strong corrosion resistance. As an excellent basic refractory raw material, its MgO content is between 87 – 98%.
Fused Magnesite (Big Crystal)
Fused Magnesite (Big Crystal) is manufactured through fusing high quality calcined magnesite at high temperature in electric arc furnace with the characteristics of complete crystal, dense texture, good high temperature performance and strong corrosion resistance.
Fused Magnesite (Big Crystal) whose MgO content is between 97 – 99% is widely used in refractory industry. Meanwhile, it is also an excellent high-temperature endurable insulating material.
Main products level :
0-1mm;1-3mm; 3-5mm; 0-10mm 50-325 mesh
Electrically fused magnesia has gradually won a place in the special refractories group, owing to its physical superiority over the ordinary grades of dead-burned magnesite. The history of its development dates from the world-war period, when considerable interest was aroused in the sources of supply of magnesite in this country. The economic advantages depend largely on the European situation and the prevailing price for the fused material, but the practical advantages of using a totally shrunk, well-crystallized material are obvious. The crystalline material obtained from various grades of raw material differs somewhat in its physical characteristics, and there is a decided difference in the physical properties between dead-burned magnesite and electrically fused magnesia.
MgO% | 92.0%MIN |
CaO% | 2.0%MAX |
H2O | 0.2%MAX |
SiO2 | 3.0%MAX |
Fe2O3 | 1.0%MAX |
Size | 3-5mm |
- Q:Which kind of refractory floor is easy to use? ?
- Since it is used in public places, fireproofing is quite important.
- Q:What's the fire resistance test method of doors and roller shutters?
- Fire resistance test method of doors and roller shutters: This standard specifies the fire resistance test method for roller shutter doors under standard fire conditions. The method is used to test the fire resistance of the ventilating duct when bearing the external fire (A duct) and internal fire (B duct). Fire resistance test of vertical ducts may be conducted referring to this standard. 1.Test specimen1.1 The test specimen is obtained by cutting from any part of the qualified metal tube unless otherwise relevant standard or mutual agreement specifies the cutting position of the metal tube. 1.2 Length of the specimen: L≈2.5D+50mm (D: outer diameter of the metal tube). The cut surface of the specimen must be perpendicular to the axis of the metal , and the seamed edge of the cut should be round off. Test method GB243-82 of metal tube necking 2. Test procedures 2.1 In the test, punch or press the metal tube into the tapered conical seat (see Figure) with a hammer or press machine, and make it uniformly diminished to the regulated shrinkage X which is calculated according to the following formula: Test method GB243-822 for metallic pipe necking: The inner wall of the seat cover used in the test should be polished, and has certain hardness and is coated with lubricating oil. Its conicity is 1:10, 1:5 or others in accordance with relevant standard provisions. If there is no provision, then adopt the conicity of 1:10. This standard is not suitable for: a) The pipeline whose fire resistance depends on the fire resistance of the ceiling; b) The pipeline with access door, unless otherwise the access door is included into the pipeline and tested together; c) The pipeline with two or three sides; d) Fume exhaust pipes;
- Q:What's the difference between refractory metal raceway and fireproof raceway?
- Refractory metal is used to lay and control cables, while trunking is used to lay wires and communication cables; refractory metal is bigger (200*100-600*200), while trunking is smaller; refractory metal has bigger turning radius, while trunking mostly turns a right angle; refractory metal has larger span, while trunking has smaller span; their fixation and installation ways are also different.
- Q:What is the main constituent of refractory brick?
- Primarily magnesium oxide and sodium silicate as binder.
- Q:What does refractory mean?
- Ordinary refractories are often used brick, semisilica brick, clay brick, high alumina brick, magnesia brick etc..Special materials often use AZS brick, corundum brick, magnesia chrome brick, silicon carbide, silicon nitride bonded silicon carbide, nitrides, silicides, sulfide, boride, carbide and other non oxide refractory materials; calcium oxide, chromium oxide, alumina, Magnesium Oxide, beryllium and other refractory materials. Often used insulation refractories are diatomite products, asbestos products, insulation panels and so onUnshaped refractory materials commonly used are fettling, refractory ramming material, refractory castable, refractory plastic material, refractory clay, refractory gunning, refractory cast material, fireproof coating, lightweight castable, mud etc..
- Q:How many kilns using refractories are needed? What are the furnaces respectively?
- Rotary kiln, general alumina bricks, high alumina bricks, corundum - mullite brick and vertical kiln. I am limited. Please forgive me that I can only talk about what I know. There are tunnel kiln, clay brick, etc. which can be used in these kiln and shuttle kiln and so on. Shuttle kiln.
- Q:Do you know the refractories?
- Definition of refractory: inorganic non-metallic material with fire resistance greater than 1580 degrees is refractory.Refractory material is a part of material industry. It is named refractory material for thermal kiln. Refractory materials are divided into conventional refractory materials and special refractory materials, and conventional refractory materials are used in metallurgical furnaces, cement kilns, glass kilns and other thermal furnace lining materials, mostly processed from natural raw materials. Special refractory materials are of high purity, mostly oxide synthetic materials, used in special smelting equipment, or special parts of kilns.
- Q:I am a refractory material manufacturer, sold products, money is always not back, anxious to die, what is the way?
- Looking for refractory materials network, you can conduct online transactions, funds guaranteed
- Q:What are the new refractories? What are the features? How about their application and development?
- In metallurgy, in what position should it be used, in order to make the best. Answers are as following. In iron, steelmaking or converter. When questioning, pay attention to the ways. Answers: Try to use synthetic refractory materials.
- Q:how to classify the fireproofing material levels A1 A2 B1?
- their classification is shown specifically in Fireproof? Specification of Building Interior Decoration?Design GB 50222-95 appendix A, flammability,inflammability materials, flame retardency, noninflammability: combustion performance of A, B3, B2, B1 materials are divided into
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Special Electrically Fused Magnesia
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