Features of diffused breathable bricks

The characteristics of the diffused breathable brick are closely related to the special structure of the diffused block. Its microporous structure can prevent the problem of slits sandwiching steel in the slit breathable brick on the basis of ensuring the air permeability. The air bubbles generated by the diffused breathable brick Small but many and very uniform, so that the stirring effect produced by the bottom blowing argon is relatively good. Therefore, the dispersion type breathable brick is favored by many steel manufacturers.

The internal structure of the diffused ventilation brick is not messy. The inner bottom round table (slit alarm device) and the core structure dispersion block are pre-fabricated, and then shaped like ordinary slit ventilation bricks. The manufacturing process is messy and the process requirements are very high. In order to ensure The long life of the dispersion block, the dispersion type breathable brick is made of synthetic materials with high strength, high refractoriness and good corrosion resistance.

During the use of the slit breathable brick, cold argon gas is continuously blown from the tail pipe, and the working face of the breathable brick is directly in contact with the high-temperature molten steel, which will generate a large temperature gradient, so that the thermal stress at the working face is particularly large, and the Coupled with the inherent quenching and heating effect, it is easy to cause cross-section adjacent to the working face. The diffused block of the diffused permeable brick has many microporous channels, and the temperature gradient is small, so the diffused permeable brick is not easy to produce brick core surface cross-section Another feature of the diffused type ventilation brick is that it has an alarm function. The alarm device is designed for a slit. It is very easy to observe the slit phenomenon in the later stage of use, and the slit is the ladle of the lower line. Compared with the slit ventilation brick, it is more and more Safety.

Dispersion-type breathable bricks have many characteristics and have many advantages compared to slit breathable bricks. For steel manufacturers, which type of breathable bricks to choose depends on the type of refining, process flow, etc.