What are the requirements for the production materials of breathable bricks?

First of all, in order to better ensure the permeability of the surface of the breathable brick, it needs to be in the steel penetration mode in the ventilation channel. In this process, we need to ensure the control of its steel penetration value, so that the breathable brick and its related materials It can well control the wetting angle of its molten steel. In addition, when the breathable brick is used in terms of performance, due to the use environment, it will be strongly scoured by some properties of the molten steel, so that the material of the brick body needs to have a high enough structure. performance and high temperature mechanical properties.

It is reported that this high-performance breathable brick is applied in intermittent mode during use. Therefore, all materials of its brick body need to have strong thermal shock resistance and peeling resistance under severe heating and cooling. Because of such good product performance, oxygen-burning cleaning is required in later use and maintenance, which ultimately improves the anti-oxidation ability of its brick surface materials, thereby better extending the service life of its products in later production. .

Therefore, in order to better meet the various properties required in the use process, it is necessary to effectively reduce the content of fine powder and increase the relevant proportion of medium particulate matter required in the manufacture of such craft bricks. At the same time, in the manufacturing process , the raw materials need to use corundum profiles such as tabular corundum and fused zirconium as aggregates. At the same time, activated alumina, high-purity fused spinel and other micropowder raw materials and chrome oxide green and other unique shape raw materials are used for matrix ratio. In this process, we should pay attention to the specific gravity of cement chromium steel and other materials in this process, which is smaller than other corundum materials.

This is mainly because these raw materials have the same physical and chemical properties, such as high fire resistance, strong thermal shock stability, etc. They also have strong slag corrosion resistance and high strength spall resistance during use, which makes them in the load performance. At a relatively soft relative temperature, it exhibits the application performance of breathable bricks with less creep and less thermal shrinkage.