Refractory

Magnesia Carbon Brick

  • Tuesday, 11 October 2022
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Magnesia Carbon Brick

Magnesia carbon bricks are made from high carbon graphite and magnesia and are bonded together by phenolic resin. These bricks have a high thermal stability and are suitable for lining furnaces. They can withstand high temperatures and low pressures, and maintain the brick structure and density.

These bricks are widely used in construction and industrial applications. Their high temperature resistance makes them an ideal material for high-quality buildings. The main raw materials for making these bricks include graphite, magnesia aggregate, resins, and additives. The most common additives are silica, BN, and B4C.

Magnesia carbon bricks can be manufactured by fusing high-purity magnesia. These bricks are produced with few grain boundaries and are therefore resistant to wear. A magnesia carbon brick's wear rate can be influenced by the amount of MgO and carbon in the slag.

Graphite is a material that can be incorporated in refractories to increase their chemical corrosion resistance. It also makes them less susceptible to thermal shock. In addition, it can contain antioxidants. Further, this material is largely used in steelmaking. However, it is important to note that it is flammable.

Magnesia carbon bricks are used in many industries. They are highly durable and resistant to corrosion and erosion. They are also used in stainless steel pickling plants and caustic acid handling vessels. In addition to this, the development of new generation magnesia carbon bricks containing Nano carbon will create a growing demand in the future.

To prepare magnesia carbon bricks, magnesium oxide materials are first graded to select fine, medium, and coarse particles. Then, they are mixed with a binder in predetermined proportions. After this, the mixture is kneaded and pressed into bricks.

The addition of fine particles increases porosity. It is best to use fine particles of less than 15% by mass. This material improves filling properties after shaping. And if it is blended with graphite, the final product will be less dense. That's why it is important to make sure magnesia carbon bricks are made of the highest quality raw material.

Another advantage of magnesia carbon brick is its corrosion resistance. It is a good choice for lining steel in harsh environments. This brick is also used in the bottom of continuous casting tundishes and the refining package outside the furnace. Further, the density of magnesia carbon bricks reduces the possibility of spalling.

The refractory properties of MgO-C bricks have been studied in detail. Research has also focused on the rate of carbon oxidation. The rate of carbon oxidation was studied to minimize its impact on the properties of the brick. MgO-C bricks have also proved to be highly durable in practice. However, their durability is largely dependent on their application and their ability to resist oxidation.

The reductive firing method has been used to evaluate the properties of MgO-C bricks. This method has been shown to reduce the apparent porosity of the bricks by up to 10%. This method is also known to increase the corrosion and oxidation resistance of the bricks.

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