Medium grade magnesia refractory raw material industry is a typical resource-based industry. In the 1980s, since China's reform and opening up, due to the rapid increase in demand for magnesium raw materials and the access of primary raw materials, the rational development of magnesite has been seriously damaged. Dicalcium Fused magnesia Due to economic reasons, the price of magnesite super grade ore is about 5 times that of the third grade ore. The extensive mining and the serious phenomenon of mining rich and abandoning poor lead to the waste of resources, and even more serious is the imbalance of mining and stripping. Or scattered exploitation of raw materials and centralized construction of several large raw material bases. The magnesia refractory raw material industry is a typical resource-based industry. Manufacturer of fused magnesia

Since China's reform and opening up, due to the rapid increase in demand for magnesium raw materials and the access of primary raw materials, the rational development of magnesite has been seriously damaged. High grade natural magnesite, light burned magnesia powder or other materials containing magnesia are used as raw materials, which are naturally cooled after melting in the electric arc furnace to make periclase crystals grow from the melt. After cooling, remove the underfused material on the block, and the frit is fused magnesia. Underfired materials can be returned to the electric arc furnace.

After sorting and grading, the frit can be broken into the size required by the market. Characteristics of large crystal fused magnesia products: large melting of crystalline particles, high point structure, dense structure; Good thermal shock stability; Good high temperature bending strength; It has good slag resistance and corrosion resistance; Heat conduction, height edge. The burnt magnesia produced with natural magnesite as raw material by one-step or two-step calcination process with high-temperature equipment such as shaft kiln and rotary kiln is called sintered magnesia; The sintered magnesia can be divided into 18 grades according to its physical and chemical indicators. When magnesite is calcined at 1800 ℃, carbon dioxide completely escapes, magnesium oxide forms a compact block of periclase, and the calcined magnesia is weighed, which has a high refractoriness.

Its main component is magnesium oxide, which is made of natural super grade magnesite ore through flotation purification, light burning, fine grinding, high-pressure ball pressing, and ultra-high temperature oil shaft kiln calcination. It is made by melting in an electric arc furnace. This product has large crystal grain, compact structure, slag resistance and good thermal shock stability. It is an excellent high temperature electrical edge material and an important raw material for making high-grade magnesia bricks, magnesia carbon bricks and unshaped refractories. It is widely used in metallurgy, chemical industry, national defense, scientific research, aerospace, household electrical components, etc.