Magnesia Carbon Bricks

Magnesia carbon bricks belong to magnesia carbon refractory. RS Refractory Supplier produces and  sales all kinds of magnesia refractory bricks. With high quality, RS magnesia carbon bricks are featured with high temperature resistance, strong slag resistance, good thermal shock resistance, and low high temperature creep rate. The Mg Carbon Bricks are usually used in converter, ac arc furnace, dc electric arc furnace lining, and the ladle, etc.

magnesia carbon bricks for sale
magnesia carbon bricks for sale

Magnesia Carbon Bricks Compositions

Mag carbon bricks are made of magnesium oxide, and carbon material with high melting point as raw materials, together with all kinds of oxide additives.  The main raw materials of magnesia carbon brick including magnesite, flaky graphite, organic binder and antioxidant.

Magnesite is the main raw material of MgO C brick. There are two types of Magnesite. As raw material of magnesia carbon bricks, one is fused magnesite and the other is sintered magnesite, and they have different characteristics. Compared with sintered magnesite, fused magnesite is featured with bulky periclase crystals, and high bulk density of the particles. Magnesite quality has a very important influence on the magnesia carbon brick. How to reasonably choose magnesia is the key to the production of magnesium carbon brick.

Graphite as the main raw material of MgO C brick, mainly due to its excellent physical performance: Non-wetting for slag, high thermal conductivity, and low thermal expansion. In addition, graphite is not eutectic with refractories at high has high refractoriness.

  • Raw materials:  magnesite, flaky graphite
  • Organic binder: coal tar, coal pitch, asphalt, as well as special carbon resin, polyol, asphalt modified phenolic resin, synthetic resin, etc.
  • Others: antioxidant

In order to improve the oxidation resistance of MgO C brick, it is added to additives.

The functions of the additives can be elaborated from two aspects: On the one hand, from the thermodynamics aspect. In the working temperature, additives reacts with carbon, thus generates other material, which is more easily oxidized compared with carbon, thus protecting the carbon. On the other hand, from the dynamics aspect. Additives react with oxygen, carbon monoxide or carbon changing the microstructure of carbon composite refractories, such as increasing density, clogging pores, and preventing oxygen or other reaction products from spreading and so on.

Commonly used binders of the mag carbon bricks are coal tar, coal pitch, asphalt, as well as special carbon resin, polyol, asphalt modified phenolic resin, synthetic resin, etc.

magnesia carbon bricks
magnesia carbon bricks

Magnesia Carbon Bricks Properties

Magnesium oxide doesn’t fuse with carbon when magnesia carbon brick is used under high temperature, therefore, keeping the good refractory performance of the original components. Furthermore, carbon is featured with good thermal conductivity, low thermal expansion and elastic coefficient, which effectively prevent spalling and slag penetration, thus greatly change the weakness of the magnesia refractory, such as the slag penetration. In addition, because of the wettability of carbon for the slag, mgo c bricks have good corrosion resistant performance.

  1. Good Thermal shock resistance
  2. Low thermal expansion and elastic coefficien
  3. Good corrosion resistantce
  4. Spalling resistance
  5. Low high temperature creep rate, etc.

Magnesia carbon brick, as a kind of composite refractory materials, takes advantage of the strong slag erosion resistance ability of magnesia and the high thermal conductivity as well as low expansibility of carbon, which effectively makes up for the spalling resistance, which is the biggest disadvantage of the poor magnesia.

In conclusion, because mag carbon bricks belong to mgo c refractories, so such products have good high temperature performances, such as good thermal shock resistance, corrosion resistance, spalling resistance, and low high temperature creep rate, becoming the ideal materials used on the furnace.

Alumina Magnesia Carbon Bricks
Alumina Magnesia Carbon Bricks

Magnesia Carbon Bricks Specification

Apparent Porosity%≤ 5.0 4.0 4.0 3.0 3.0
Volumo Density g/cm3≥ 3.00 3.00 2.98 2.95 2.92
Cold Crushing Strength MPa≥ 50 40 40 35 35
Chemical Composition%  Mgo,≥ 84 82 76 76 72
 C,≥ 8 10 12 14 18
Application General Use Corrosion Resistance Extra Corrosion Resistance

 Magnesia Carbon Bricks Applications

Magnesia carbon bricks can be used in the key parts of the thermal technology furnaces, such as:

  • Steelmaking Converter
  • Electric Arc Furnace
  • Ladle
  • Secondary Refining Furnace
  • AC Arc Furnace
  • DC Electric Arc Furnace
RS Magnesia Carbon Bricks Manufacturer
RS Magnesia Carbon Bricks Manufacturer

Magnesia Carbon Bricks Manufacturers

Zhengzhou Rongsheng Kiln Refractory Co. Ltd, has established more than decades, it has become a comprehensive enterprise producing refractory materials in metallurgy, building materials, electric power and chemical industry, etc. Rongsheng 2 refractory factories, the refractory bricks and refractory castables are equipped with advanced production equipment to efficiently complete customer orders.

RS Refractory Bricks: high alumina bricks, magnesia bricks, carbon bricks, silicon bricks, corundum brick and fireclay bricks, etc.

RS Unshaped Refractory: refractory castable, high alumina cement, low cement castables, and wear resistance castable, etc.

RS Refractory Products have passed the ISO9001:2005 Quality Certification. In addition, Rongsheng has established cooperative relations with multiple scientific research institutes, so we can ensure you the superior quality of magnesia carbon bricks.

Rongsheng has exported such magnesia carbon bricks to Ireland, Banglagdesh, Indonesia, Vietnam, etc. Welcome the you to check the price and buy magnesia carbon bricks from RS!

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