Magnesia furnace bricks should be reasonably selected and used according to the working conditions and their properties. The varieties and uses of magnesia furnace bricks have been introduced before. The following are the kilns in which several magnesia furnace bricks are used.
1. Usually magnesia brick
It can experience the high temperature heat load of molten steel and molten slag, the flow impact of fluid and the chemical corrosion of molten steel and strong alkaline slag. Therefore, all the linings of smelting furnaces subjected to the above effects, such as open hearths, converters, electric furnaces, iron mixing furnaces, non-ferrous metal smelting furnaces, hearths of soaking furnaces and heating furnaces, as well as regenerators of cement kilns and glass kilns, etc. This kind of furnace brick can be used. However, due to its poor thermal shock resistance, it should not be used in places where the temperature changes rapidly. In addition, due to its large thermal expansion and low softening temperature under load, it must be suspended when used on the top of high-temperature kilns.
2. Magnesia calcium brick and magnesia silica brick
It can be used in the same places as ordinary magnesia bricks. However, because these finished products have a higher softening temperature under load, and magnesia-calcium bricks have better resistance to alkaline slag, magnesia-silica bricks also have the ability to resist various slag, so the scope of application more extensive. For example, magnesia-calcium bricks are better used in places corroded by alkaline slag. However, this kind of finished product has poor thermal shock resistance and is easy to crack. Magnesia-silica bricks can also be used as lattice bricks with less temperature change in the upper part of the regenerator of open hearth furnaces and glass melting furnaces.
3. Magnesia alumina brick
It can replace ordinary magnesia bricks, and it works well for the parts that suffer from the above effects. High-alumina bricks have excellent thermal shock resistance and high softening temperature under load, so they can also be used in places subject to periodic temperature fluctuations, such as being thrown on the top of open hearth furnaces, high temperature zones of cement kilns and regenerators of glass melting furnaces, etc. At this point, the application effect is significantly better than that of ordinary magnesia bricks. It can also be used on the top of other high temperature kilns such as high temperature tunnel kilns.
4. Magnesia chrome brick
It is suitable for service under the conditions of high temperature, slag corrosion and rapid temperature change. It is better used in places with similar working conditions as magnesia alumina bricks, such as open hearth furnace tops, non-ferrous metal smelting furnaces, high temperature zones of cement kilns and glass kiln regenerators. But it should not be used under the conditions of frequent changes in the atmosphere.
5. Magnesia carbon brick
It has good slag resistance, is not prone to structural spalling, and has good thermal shock resistance and is not prone to thermal cracking, so it is suitable for places subject to severe erosion and temperature changes. This kind of finished product has become the main material for oxygen steelmaking converter lining and electric furnace wall. It is also widely used in ladles. However, this material should not be used directly in a strong oxidizing atmosphere.
6. Directly combine magnesia bricks
It has high high temperature strength and excellent corrosion resistance. It is used in places where high temperature, heavy load and slag corrosion are severe, and its application effect is usually better than the above-mentioned ordinary magnesia furnace bricks.
Wechat Us 
