Magnesia Carbon Brick is a kind of composite refractory bricks made by combining carbonaceous binders. Magnesia carbon bricks are made of magnesium oxide, and carbon material with high melting point as raw materials, with the addition of all kinds of non-oxide additives. Magnesia carbon bricks have excellent slag corrosion resistance, good thermal shock resistance, high temperature resistance, and low high temperature creep rate. Magnesia carbon bricks are widely used in converter, electric furnace, EAF and ladle.Therefore, RS supplier can provide you high quality products at low price. Welcome to contact us for free quotation.
What are Magnesia Carbon Brick?
Magnesia carbon brick belongs to a kind of Magnesia bricks. Magnesia carbon brick is a composite refractories made by combining carbonaceous binders. Magnesia carbon bricks are made of magnesium oxide, and carbon material with high melting point as raw materials, with the addition of all kinds of non-oxide additives.
Magnesia Carbon Brick Properties
As a kind of composite refractory material, magnesia carbon brick effectively utilizes the strong slag-resistant erosion ability of magnesia and high thermal conductivity and low-expansion property of carbon, and compensates for the biggest shortcomings of poor delamination resistance of magnesia. Mgo-C bricks mainly has the following characteristics:
- Good high temperature resistance
- Srong slag resistance
- Excellent thermal shock resistance
- Low high temperature creep rate
Magnesia Carbon Brick Composition
The main raw materials of magnesia carbon brick are magnesia, graphite, binders and additives. The quality of these raw materials directly affects the performance and use of magnesia carbon bricks.
Magnesite is the main raw material of magnesia carbon brick. Magnesite quality has a very vital influence on the magnesia carbon brick. How to reasonably choose magnesia is the key to the production of magnesium carbon brick. Magnesite has two types, one is fused magnesite and the other is sintered magnesite, and they have different characteristics. Compared with sintered magnesite, fused magnesite has good performance in bulky periclase crystals, and high bulk density of the particles. What’s more, the purity of magnesia has a major influence on the slag resistance of magnesia-carbon bricks. The higher the MgO content, the less the impurities, and the higher the slag resistance of magnesia carbon bricks.
The carbon material of magnesia carbon bricks is mainly flake graphite. Flake graphite has good high temperature resistance, electrical conductivity, thermal conductivity, lubrication, plastic and acid and alkali resistant properties.
In the production of magnesia carbon bricks, the binder acts to bond the matrix and the particles.
- 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(Metal aluminum powder, silicon powder, aluminum magnesium alloy powder,B4C,CaB6,etc)
Magnesia Carbon Brick Manufacturing Process
According to the different binders used, there are two kinds of production process of MgO-C bricks.
Firstly, When phenolic resin is used as a binder, the production process of magnesia carbon bricks is shown in the figure below:
Features: Mixing at room temperature, molding, process is simple.
Secondly, When asphalt is used as a binder, the production process of magnesia carbon bricks is shown in the figure below:
Features: In the balching, mixing and forming process, the mixture needs to be heated and the process is a little complicated. However, when bitumen is broken into fine powder and a certain amount of eucalyptus oil or washing oil is added as a cosolvent, a cold forming process can also be used to produce bitumen-bound magnesia carbon bricks.
Magnesia Carbon Brick Uses
Magnesia carbon bricks are widely used in the following fields:
- Electric furnace
- AC arc furnaces, linings of DC arc furnaces
Magnesia Carbon Brick Specification
|MgO /% ≥||80||78||76||76||74||74||72||70||70|
|C /% ≥||10||10||10||14||14||14||18||18||18|
|Apparent Porosity /% ≤||4||5||6||4||5||6||3||4||5|
|Bulk Density /g/cm-3 ≥||2.9||2.85||2.8||2.9||2.82||2.77||2.9||2.8||2.77|
|Cold Crushing Strength /MPa ≥||40||35||30||40||35||25||40||35||25|
|Modules of rupture /MPa ≥||6||5||4||10||8||5||9||7||4|
Magnesia Carbon Bricks Manufacturer
Rongsheng Kiln Refractory Company is a professional Magnesia carbon Brick Manufacturer in China. We export high quality Magnesia carbon Bricks to many countries such as Indonesia, Pakistan, Thailand, South Africa, Turkey, Iran, Saudi Arabia, Iraq, Japan, Korea, India and so on. Magnesia Carbon bricks have become a very mature product in our area. RS manufacturers proudly manufacture top quality Magnesite-Carbon bricks gaining fame world-wide. So please feel free to acquire what you want!