In the steel industry, magnesia brick plays an indispensable role, its use is mainly reflected in the following key aspects:
Magnesia brick
1. The core material of steel furnace lining
The steel making process is carried out at extremely high temperatures, and magnesia bricks are ideal for steel furnace linings due to their excellent high temperature resistance. Whether it is basic oxygen converter or electric arc furnace, magnesia brick can withstand long-term high temperature radiation and direct contact with molten steel, effectively preventing heat loss, to ensure that the high temperature environment in the furnace is stable and continuous. During the bconverter blowing, the intense chemical reaction makes the temperature in the furnace rise sharply, and the magnesia brick still maintains its structural integrity under the high temperature impact, which provides a solid and reliable internal space support for the smooth promotion of the steelmaking reaction, and effectively guarantees the continuity and stability of the steelmaking process.
2. The protection of molten steel refining links
In the refining stage of molten steel, such as LF (ladle refining furnace), VD (vacuum degassing) and other refining equipment, magnesia bricks also have excellent performance. The refining process has strict requirements on the temperature, composition uniformity and purity of molten steel, and the refining furnace lining constructed of magnesia brick can resist the erosion and scouring of high-temperature molten steel and various slag forming agents and alloying elements added in the refining process. Its good chemical stability ensures that the refining process will not pollute the molten steel due to adverse reactions between the lining material and the molten steel or other substances, thus laying the foundation for the production of high-quality steel with special performance requirements, helping to accurately control the quality indicators of molten steel and meet the strict quality specifications of high-end steel products in the modern steel industry.
3.Protecting the integrity of the furnace structure
The process of iron and steel smelting is accompanied by complex physical and chemical changes, and the huge thermal stress and static pressure of molten steel and slag pose a serious threat to the furnace structure. With its high mechanical strength and good thermal shock stability, magnesia brick can effectively alleviate the damage effect of these stresses on the furnace body. Under the harsh conditions of long-term high temperature, high pressure and frequent thermal cycling, magnesia brick can keep its structure relatively stable, avoid cracks, spalling and other damage phenomena, and then maintain the structural integrity of the entire steelmaking furnace body. This not only reduces the downtime caused by furnace body maintenance or replacement of lining materials, improves the utilization rate and production efficiency of steel production equipment, but also reduces the cost input of steel enterprises in equipment maintenance, and provides strong support for the efficient and stable production of the steel industry from the perspective of equipment operation guarantee.
