What is the role of mid-range magnesia in use

As the main refractory material, mid-range magnesia has practical applications in many places, and its functions are different in different places. How much do you know about such a common refractory material? Next, we will briefly introduce some of the main functions of mid-range magnesia as refractory materials, hoping to help you. 97 fused magnesia

The mid-range magnesia production system includes converters, electric furnaces, out-of-furnace refining furnaces, ladle, and tundish equipment. In electric furnaces, dry vibrating materials, prefabricated or cast-in-place furnace covers, or furnace covers: triangle areas, etc. Good fire-resistant use effect is obtained; in converters and electric furnaces, fire-resistant spray coatings are generally used for appropriate repairs when damaged. The methods include manual patching, wet, dry or flame spraying and slag splashing methods. In the converter, the traditional slag splashing furnace protection technology is generally used, and the furnace age can reach nearly 10,000 times; there are many types of refining furnaces outside the furnace, and the RH method and DH method degassing devices are inserted into the corresponding pipe linings. The high-aluminum refractory castable is poured into a large area and the service life is about 20 to 80 times. Ladle and tundish are important auxiliary industrial equipment for steelmaking furnaces, and are also thermal equipment that consumes the most refractory materials.

The iron system includes sintering, coking, blast furnace and its auxiliary equipment. The ignition furnace of the belt sintering machine is made on-site with refractory plastic and clay combined with refractory castables, or hoisted with phosphoric acid refractory castable prefabricated blocks, and its service life is 3 to 6 years. When the linear ignition device is used, the furnace top pressure is more and the furnace working conditions become better. Lightweight high-strength refractory castables or refractory fibers and their products can be used as linings to obtain better results.

Promoting sintering: The sintering effect of metal on refractory materials can be attributed to two factors: First, the introduction of plastic phase forming formed by metal can increase the density of the green body, shorten the distance between particles, and reduce the diffusion and mass transfer during the firing process. The required energy; Second, the melting point of metal is generally lower than that of refractory raw materials, which can generate liquid phase at a lower temperature. The capillary force formed by the liquid phase and its own viscous flow accelerate the migration rate of atoms and the body Shrinkage promotes the densification process of sintering.