Magnesite Bricks are magnesite refractories whose magnesium oxide content is more than 90%. They are basic refractories made from the main crystalline phase periclase, Can be normally divided into burnt magnesite brick and chemical bonded magnesite brick two kinds. Magnesite bricks have good alkali resistance and are widely used in alkaline open hearth for steel-making, the bottom of the furnace and the wall of the furnace. If you are in need of cheap magnesia bricks with qualified for your furnace, just Email Rongsheng Kiln Refractory Company! Quote RS!
Magnesite Brick Meaning
According to the Magnesia Bricks wikipedia, Magnesite brick, also called magnesite refractory brick or magnesite fire brick are alkaline magnesite refractories choose periclase as the main crystalline phase. Since magnesium oxide content is over 90 %, they have strong alkali resistance and good high temperature resistance. In the heating furnace and soaking pit, magnesia bricks are mainly used for laying the bottom surface of the furnace and the bottom of the soaking pit.
Magnesia Bricks Composition
The main raw material for making magnesia bricks is the sintered magnesis whose basic content is MgCO3. It has the requirement for the chemical composition and sintering degree of the sintered magnesia. The chemical composition of sintered magnesia should be MgO＞87%, CaO ＞3.5%, SiO3 < 5%, and on the other hand, sintering condition should be good. The degree of sintering condition is generally measured by density, and the density had better greater than 3.53g/cm3. The appearance color of sintered magnesia is tan or brown, and degree of burning is less than 0.3%. It requires no tumor substance, and the less black block the better. After being selected, sintered magnesia can be digested by thoroughly removing the light burning components and impurities of free lime. Add a certain amount of water to the calcined magnesia stone and remove the lime with a sieve after weathering the CaO.
Magnesite Bricks Properties
- High refractoriness up to 2000℃.
- Refractoriness under load is high.
- Good alkali resistance.
- Poor thermal shock resistance.
Magnesite Bricks Uses
Magnesite bricks are widely used for steelmaking alkaline hearth furnace, electric furnace bottom, and wall, permanent lining of oxygen converter, nonferrous metal smelting furnace, high temperature tunnel kiln, calcined magnesite bricks kiln and cement rotary kiln lining, heating furnace bottom and wall, glass kiln storage room and so on.
Magnesite Bricks Classification
1.Burnt Magnesite Bricks.
- Silicate bonded magnesite brick.
- Directly bonded magnesite brick.
- Re-bonded magnesite brick.
2.Unburned Magnesite Bricks.
- Chemical bonded magnesite brick.
- Bituminous bonded magnesite brick.
Magnesite Bricks Manufacturing Process
The main material of magnesia bricks is magnesite, its basic component is MgCO3, which becomes sintered magnesia after calcining at high temperature and breaking to a certain size. The sintered magnesia is widely used as patching material and ramming material, and the magnesia with less impurity has been chosen to make magnesite bricks.
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According to their different production processes, magnesite bricks are divided into sintered magnesite bricks and chemically bonded magnesite bricks. Sintered magnesite bricks are made from dead burned proper granular size magnesia, adding brine aqueous solution (MgCl2) and sulfite pulp waste liquor as a binder, burned at 1550 ~ 1650 ℃ high temperature after compression molding. While, the production of chemical bonded magnesite bricks are not through the burning process. When the sintered magnesia is prepared according to the grain size ratio, add appropriate mineralization agents and binding agents, the final product is formed after pressing and drying. The strength of chemically bonded magnesite bricks is lower than that of sintered magnesite bricks, but the price is lower than half that of sintered magnesite bricks. Chemically bond magnesite bricks are used in places where performance requirements are not high, such as heating furnace and soaking pit bottom.
Magnesite Bricks Specification
|Apparent Porosity %||≤20||≤18||≤17||≤16|
|Bulk density g/cm³||2.8||2.86||2.95||3.1|
|Cold Crushing Strength Mpa||≥50||≥60||≥65||≥70|
|0.2Mpa Initial RUL ℃||1540||1550||1620||1700|
|Reheating linear change % 1650℃, 2h||≤0.6||≤0.5||≤0.4||≤0.4|
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Magnesite Bricks Price
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Magnesite Bricks Manufacturer
Among magnesite bricks manufacturers, RS magnesite bricks manufacturer is on the top list who can produce a large amount of various qualified magnesite bricks with cheap price. Rongsheng magnesite bricks manufacturer is like the magnesite bricks manufacturer in India, have years of experience in producing magnesite bricks and produce tons of magnesite bricks annually. Every year, RS magnesite bricks manufacturer sells magnesite refractory bricks world widely. Any need of magnesite bricks? Click RS For Cheap Magnesite Bricks! Quote RS Now!