Magnesia-chrome bricks are refractory products containing magnesium oxide (MgO) and chromium oxide (Cr2O3) as the main components, and periclase and spinel are the main mineral components. Magnesia-chrome bricks, which have high refractoriness, high temperature strength, strong resistance to alkaline slag, excellent thermal stability, and certain adaptability to acidic slag. The main raw materials for the manufacture of magnesia chrome bricks are sintered magnesia and chromite. The purity of the magnesia raw material should be as high as possible. The requirements for the chemical composition of the chromite ore are: Cr2O3: 30-45%, CaO: ≤ 1.0-1.5%. Magnesia-chrome bricks are generally produced from sintered magnesia and refractory grade chrome ore. The refractory grains are silicate-bonded. The domestic magnesia-chrome bricks generally refer to ordinary magnesia-chrome bricks that are fired. Chrome bricks.

Magnesia chrome brick has a refractoriness of more than 2000 ° C, and the load softening temperature is generally above 1550 ° C. The high temperature volume stability is good, and the resistance to quenching and heat is stronger than that of magnesia brick. Refractory bricks can be used as high-temperature building materials and structural materials for building kiln and various thermal equipment, and can withstand various physical and chemical changes and mechanical effects at high temperatures. Now with the continuous development of China's cement industry, refractory materials Higher requirements have also been raised. The refractory industry, which has long relied on extensive economic growth, should increase its adjustment efforts to meet the needs of the new situation.

       China's cement industry refractory industry has problems such as low industry concentration, vicious competition, shortage of raw material resources, etc. Only by accelerating the reorganization and integration of refractory production enterprises for cement kiln can we adapt to the rapid development of the cement industry. At the same time, refractory brick enterprises should also strengthen cooperation with research institutes and user units, increase cooperation between industry, universities and research institutes, achieve new breakthroughs in the technology of green refractory materials, and strive to achieve some key green refractory materials in a short period of time. Substantial breakthroughs were made in technology and promotion. While developing green refractory materials, product quality must also be guaranteed. The reasons for the low life of refractory materials are mainly due to the backward production equipment of the manufacturer. The friction brick press is used for molding. The automation level of the ingredients, molding, firing and inspection processes is low, the product quality fluctuates greatly, the dimensional deviation is large, and the masonry method is improper. . In use, in order to prevent the refractory material from falling bricks, the steel plate is excessively locked, resulting in a large expansion of the refractory material during heating, excessive pressure to damage the refractory brick, and low level of fine management.