Main properties and applications of magnesia carbon brick

Magnesia carbon brick is made of magnesia, heavy burned magnesia, fused magnesia, high purity magnesia and high quality graphite and bauxite additives. The price of magnesia carbon brick has a great relationship with the graphite content in the brick. With the increase of graphite content, the strength of brick decreases, the thermal expansion rate decreases, and the residual expansion rate increases.

Therefore, the graphite content in the brick should be controlled at about 20%. Magnesia carbon brick has little wettability to slag, excellent spalling resistance and erosion resistance, and is suitable for slag line parts of ladle, especially for multi-furnace continuous pouring. In order to meet the need of producing clean steel, the application part of magnesia-carbon brick has been expanded from the slag line to the side wall during the refining of ladle.

When laying magnesia-carbon bricks on ladle, care should be taken not to mix with bricks containing high Si02. Otherwise, the local melting loss of magnesia-carbon brick will be increased, and the melting loss mechanism is as follows.

It is mainly used for lining and outlet of oxidizing reconversion furnace, hot spot of wall of high-power electric furnace, inner lining of refining furnace and slag line of steel drum outside the furnace.