The function of a magnesia-carbon brick manufacturer depends on the existence of carbon in the brick. The oxidation of carbon in the process of using it is easy to form the degradation of the product organization, so that the slag invades into the brick along the gap, corrodes the magnesia-carbon particles, and reduces the service life of magnesia-carbon brick.

The requirements of binder for magnesia-carbon brick consumption are

1. It has a certain viscosity and activity under the conditions, and has good wettability to magnesia and graphite

2. The binder can be further condensed in the process of thermal disposal, so that the product has a higher strength

3. In the process of thermal disposal, the binder shall not cause excessive expansion and contraction of the product, so as to avoid cracking of the product

4. The content of F.C should be high, and the carbon polymeric body after coking treatment has good high temperature strength

The binder of common consumption magnesium-carbon brick is coal pitch, coal tar, special carbonaceous resin, polyalcohol, asphalt modified phenolic resin, decompose phenolic resin and so on.

The stirring action of the breathable element has an important influence on the composition and temperature of uniform molten steel and the promotion of alloying. The long nozzle and the immersion nozzle maintain the molten steel to avoid secondary oxidation. At the same time, the immersion nozzle controls the flow field of the mold, which plays an important role in promoting the floating of inclusions, adding slag and shaking the flow field. Silicone-free carbon-free immersion nozzle with anti-blocking function can not only reduce the carburization and silicon of molten steel, but also avoid the adhesion of alumina in the nozzle and add large inclusions in the billet. Magnesia-carbon immersion nozzle can avoid alumina inclusion in molten steel and is beneficial to improve the quality of cord steel.

The flow path of molten steel can be optimized by setting a reasonable turbulence controller in the tundish, optimizing the combination of weir and dam, and adding dead zone by using air curtain retaining wall to promote the floating of inclusions and improve the quality of billet. Optimize the shape of the plug rod head, improve the sensitivity of the molten steel flow control, add a firm liquid level in the mold, reduce the feasibility of slag-rolling; Argon gas channel is set at the head of all plug rods to reduce alumina adhesion and improve the quality of billet.