The magnesia chrome bricks is a kind of refractory material, which the main content of magnesia chrome bricks are magnesia oxide and chromium oxide and the main mineral constituent is periclase and spinel. This kind of brick has the characteristic of high refractoriness, high temperature strength, strong corrosion resistance to alkaline slag, good thermal stability and a certain adaptability to acid residue. The main raw materials for making magnesia chrome bricks are sintered magnesia and chromite. The purity of magnesia raw materials should be as high as possible, the chemical composition requirement of chromite is: Cr2O3:30 – 45%, CaO = 1 ~ 1.5%.

Production Process of Magnesia Chrome Bricks

The production process of magnesia chrome brick is similar to that of magnesia brick. In order to eliminate the loose effect caused by the expansion of generating spinel by the reaction of MgO and Cr2O3, Al2O3 or iron oxides during the sintering process, we can also use magnesia chrome bricks made from synthetic sintered materials. In addition, there are unburned magnesia chrome bricks, for example, unburned magnesia chrome brick combined with inorganic magnesium salt solution. The production process of unburned magnesia chrome brick is simple, the cost is low, and the thermal stability is good, but the high temperature strength is far less than the brick.

Application of Magnesia Chrome Brick

Magnesia chrome brick is mainly used in the metallurgical industry, such as the construction of open hearth, furnace top, furnace refining furnace and various non-ferrous metal smelting furnace. The high temperature section of ultra high power electric furnace is made of fused magnesia chrome bricks. Magnesia chrome bricks made from synthetic materials are used in high erosion area of external refining furnace. Magnesia chrome bricks made of fused magnesia chrome bricks and synthetic materials are used in high erosion area of non-ferrous metal flash smelting furnace. In addition, the magnesia chrome brick is also used in the burning zone of cement rotary kiln and the regenerator of glass kiln.

Physical and Chemical Index of Magnesia Chrome Brick