The magnesia bricks are able to withstand extremely high temperature up to 2000℃(3632℉). Kerui uses high purity fused magnesia as the main raw material. Now this magnesium bricks are one of the most popular product in high temperature kiln linings. Kerui customers cover more than 50 countries and regions in this world, including Russia, the Philippines, Fiji, Kuwait, Morocco, Thailand, Armenia, Denmark, Mexico, Sri Lanka, etc.
Standard Magnesia Refractory Bricks for Sale
The basic refractory bricks consist of 90% magnesia in bricks (MgO). Therefore, this refractory fire brick has strong resistance to basic chemical corrosion. Here are specific technical details about the basic refractory bricks.
This product has wide applications in permanent lining parts of steelmaking furnaces, lime kilns, glass kilns, regenerators, ferroalloy furnaces, mixed iron furnaces and various parts of non-ferrous metal furnaces.
| Item | M-98 | M-97A | M-97B | M-95 | M-91 | |
|---|---|---|---|---|---|---|
| MgO, % | ≥ | 97.5 | 97.0 | 96.5 | 95.0 | 91.0 |
| SiO2, % | ≤ | 1.00 | 1.20 | 1.50 | 2.00 | / |
| CaO, % | ≤ | / | / | / | 2.00 | 3.00 |
| Apparent Porosity, % | ≤ | 16 | 16 | 18 | 16 | 18 |
| Bulk Density, g/cm³ | ≥ | 3.00 | 3.00 | 2.95 | 2.90 | |
| Cold Crushing Strength, MPa | ≥ | 60 | 60 | 60 | 60 | |
| 0.2MPa Refractoriness Under Load, ℃ | ≥ | 1700 | 1700 | 1650 | 1560 | |
| Permanent Linear Change, % | 1650℃*2h -0.2~0 | 1650℃*2h -0.3~0 | 1600℃*2h -0.5~0 |
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Full Range of Kerui Magnesia Bricks
Kerui Refractory is a manufacturer that develops products with application as the center. We attach great importance to the R&D department. In order to improve the application effect of magnesia bricks, we provide high-quality composite magnesia bricks. Here are some introductions for you:
Magnesia Carbon bricks: It has graphite to improve thermal conductivity, corrosion resistance, mechanical strength, and make up for the anti-stripping magnesite bricks properties. It is often used in converter linings, AC arc furnaces, DC arc furnaces, ladle slag lines and other parts.
Magnesium Spinel bricks: Magnesium aluminum spinel bricks and magnesium iron spinel bricks are provided, with improved thermal shock stability and enhanced slag resistance. One of the most widely application is to build the top of basic steelmaking furnaces, open hearth furnaces and electric furnaces. If you want to explore more info, welcome to visit Kerui YouTube.
Magnesia Chrome bricks: poor resistance to temperature changes. It is suitable for the parts with serious slag invasion, corrosion, wear and scouring and has better effect when used in continuous operation furnaces. It is mostly used to build open-hearth furnace tops, electric furnace tops, external refining furnaces and various non-ferrous metal smelting furnaces, as well as cement rotary kiln firing zones and glass kiln regenerators.
Magnesia Calcium bricks: also called dolomite bricks, magnesia dolomite bricks. It’s a clean refractory material that has the function of adsorbing impurities and purifying molten steel. It can replace magnesia chrome bricks. It is most commonly used in the lining, furnace wall, furnace bottom, cladding and other parts of AOD, VOD, and GOR furnaces;
Excellent Magnesia Bricks Properties
High Refractoriness
Magnesium bricks have high refractoriness. The refractoriness of magnesia chrome bricks could be up to 2000℃. They could be used for the lining of different industrial equipment because of their good thermal conductivity. Among them, magnesia chrome brick has better resistance to acute cooling and heat. The volume is more stable at high temperature than other magnesite refractory bricks.
Strong Resistance to Alkaline Slag
Magnesia brick is an alkaline refractory material. So magnesia brick has strong resistance to alkaline slag. It can not resist the erosion of acid slag. However, magnesia chrome bricks can also resist some acidic substances. Using Kerui magnesia brick as the lining of equipment could extend the service time and keep the stability.
Good Resistance to Thermal Shock
Magnesium brick has good resistance to thermal shock. However, its resistance could be improved by adding different substances. As a compound refractory material, magnesia carbon brick has the strong resistance to alkaline slag and high thermal conductivity. Magnesia chrome bricks for cement kilns are more prone to produce kiln skin. The resulting kiln skin compensates for the poor resistance to thermal shock.
Usages of Magnesium Oxide Brick
Magnesia refractory brick plays an essential role in steelmaking alkaline flat furnaces, electric furnace bottom and wall, the permanent lining of oxygen converters, non-ferrous metal smelting furnaces, high-temperature tunnel kilns, heating furnace bottom and wall, glass kiln heat storage chamber lattice brick, and so on.
For the magnesium refractory brick mentioned above, Kerui will make different adjustments according to the actual use conditions and environment. The use of special-shaped brick masonry in complex parts ensures the economic benefits and later maintenance of enterprises in use. If necessary, we can provide a one-stop service to avoid problems during construction. Please contact us at any time.
Advanced Magnesite Bricks Manufacturing Process
According to different production processes, we can divide magnesite refractory bricks into two processes: direct bonding and chemical bonding.
Sintered magnesia bricks need to be continuously sintered in a high-temperature tunnel kiln at 1550~1650℃ to achieve the stability of their internal chemical properties. Sintered magnesium oxide bricks have high strength and a wider range of applications.
Chemically bonded magnesia bricks are also called unburnt/unsintered magnesia bricks, which means that appropriate mineralizers and binders are added to the mixed raw materials and then pressed into shape. Chemically bonded magnesite bricks are relatively cheaper and can be used in areas where performance requirements are not too high.
Magnesia Brick Manufacturer in China
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Certificates: ISO/CE/SGS certificates;
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