Magnesia carbon brick for converter refers to a magnesia carbon brick for converter, which is made of magnesia and graphite as the main raw materials and used as a converter lining. The main raw materials are fused magnesia or high-purity sintered magnesia and high-purity graphite. Generally, it is required that MgO in magnesia is greater than or equal to 95%, and the content of C in graphite is greater than or equal to 94%. Use phenolic resin or asphalt as binding agent, select appropriate additives according to use conditions, and make finished products after batching, kneading, molding, and heat treatment. Gunning material

During the smelting process, the operating conditions and damage of each part of the converter are different. In order to achieve balanced corrosion loss, the grades and quality of the selected magnesia carbon bricks are different for each part of the converter under different conditions of use.

The temperature of the furnace mouth and the furnace cap changes drastically, and the slag corrosion is serious. The magnesia carbon bricks with good thermal shock resistance and strong slag resistance should be selected. Except for the damage caused by blowing, the two sides of the trunnion have no protective slag layer cover on the surface, which is not easy to repair, and the carbon in the brick is easy to oxidize. High-quality magnesia carbon bricks with excellent slag resistance and good oxidation resistance should be built. The slag line is in long-term contact with molten slag and is severely corroded by slag. It is necessary to build magnesia carbon bricks with excellent slag resistance. The splashing effect of slag and molten steel when oxygen is blown on the charging side can easily cause chemical erosion, abrasion, erosion, and direct impact and erosion of the loaded scrap steel and molten iron on the charging side. Magnesia carbon bricks with strong slag resistance, high temperature strength and good thermal shock resistance should be selected. Compared with other parts, the hearth and bottom have lighter erosion. Ordinary magnesia-carbon bricks can be used. When top-bottom composite blowing technology is used, especially bottom blowing CO2, O2 and other gases, the damage is more serious. High-grade magnesia carbon bricks with good oxidation resistance, good thermal shock resistance, high temperature strength, and strong slag resistance should be selected. Depending on the use of different parts of the converter, the selection of magnesia-carbon bricks with corresponding properties is an effective way to improve the technical and economic indicators of the converter.