Alumina Magnesia Carbon Brick Introduction:
Alumina-magnesia-carbon bricks are refractory products made from premium high-alumina bauxite or corundum sand, magnesia, and flake graphite. To enhance their oxidation resistance, additives such as Si powder, Al powder, SiC powder, or ferrosilicon powder can be added to the mix. The bricks are bonded with resin, high-pressure formed, and can be used after treatment at 200–300°C without the need for firing. They are primarily used for the linings of large converters, ultra-high power electric arc furnace ladles, and out-of-furnace refining vessels.
Alumina magnesia carbon (AMC) refractory bricks are a type of composite refractory material used in high-temperature applications such as steelmaking ladles, converters, and ladle slag lines. They are composed of alumina (Al2O3), magnesia (MgO), and carbon (C) as key components, along with various additives to enhance performance.
Alumina Magnesia Carbon Brick Advantages:
- High temperature resistance
- High erosion resistance
- Strong spalling resistance
- High residual linear expansion rate
- Excellent slag erosion resistance
- Strong thermal shock resistance
- Little reheating linear expansion
Alumina Magnesia Carbon Brick Application:
Alumina magnesia carbon (AMC) refractory bricks are a type of composite refractory material used in high-temperature applications such as steelmaking ladles, converters, and ladle slag lines. They are composed of alumina (Al2O3), magnesia (MgO), and carbon (C) as key components, along with various additives to enhance performance.
AMC refractory bricks are used mainly on sidewalls and bottom working linings of steel-making ladles, a vessel with a critical role in current integrated metallurgical processes [3]. The application of AMC bricks in the slag line is limited due their susceptibility to basic melt attack at high temperature [4]. These refractories are exposed to severe mechanical and thermal loading throughout their lifetime, in an aggressive environment comprised of melts (metal and slag), gases and solid particles. Their main advantage with respect to the other members of the C-oxide family, such as MgO-C and Al2O3-C bricks, is the in-situ formation of MgAl2O4 spinel at temperatures over 1000 °C, an expansive process which collaborates to close joints, reducing the corrosion by melts.
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