Magnesia sand, the most commonly used raw material for magnesia refractories

Magnesite is the main raw material of magnesia refractory. The main chemical composition is MgO and the mineral is periclase. Cyanite is an equiaxed crystal system, with a density of 3.56-3.67g / cm3, a hardness of 5.5, a linear expansion coefficient of 13.5 × 10-6K-1, a large elastic modulus, and a cubic, octahedral, or irregular granular shape It has stable chemical properties, large lattice energy, and a melting point as high as 2800 ° C. Magnesium oxide is mainly produced from natural magnesite, dolomite, brucite (Mg (OH) 2), serpentine (3MgO · 2SiO2 · 2H2O), salt lake brine, seawater, etc.

 

Magnesite is the mineral name of magnesium carbonate (MgCO3). Magnesite in the category of industrial minerals and rocks is mainly composed of crystalline and amorphous magnesite minerals. It is a carbonate rock that can be used industrially. The magnesite used in industry is actually processed magnesite. The processed magnesite is called magnesite in the original product standard issued by the Ministry of Metallurgy. Magnesite has two categories: crystalline magnesite and cryptocrystalline magnesite. Its theoretical chemical composition is: w (MgO) = 47.8%, w (CO2) = 52.2%. Natural magnesite is trigonal or cryptocrystalline white magnesite.

The hardness of crystalline magnesite is 3.4-5.0, and the bulk density is 2.96-3.12 g / cm3. From the chemical composition point of view, the most common impurities of magnesite are CaO, Fe2O3, SiO2, Al2O3 and so on. The impurities contained in magnesite can promote sintering, but when the content of impurities is large, its fire resistance is greatly reduced, and even the production process is difficult.
 

Sunrise Refractory has abundant natural magnesite resources. Therefore, our magnesium bricks are loved by customers around the world. If you have any question for our magnesium bricks, call me and i will reply you in the first time.