What is the use of high-purity magnesia

High-purity magnesia is one of the important products produced by fireproof material manufacturers, and such products are widely used in fire protection projects. So, do you know what high-purity magnesia is? What is it for? Next, let's introduce it to you, hoping to help you in choosing refractory materials. 97 fused magnesia

High-purity magnesia is one of the most important raw materials for refractory materials, used to make various magnesia bricks, magnesia alumina bricks, ramming materials, and repairing materials. Containing more impurities, it is used for paving the bottom of steelmaking furnace.

The main component of magnesia is magnesium oxide, and the impurities are CaO, SiO2, Fe2O3, etc. Magnesium oxide is an alkaline oxide with a melting point of 2800 degrees. After high temperature heating, it transforms into a stable cubic crystal, commonly known as periclase.

GB/T 2273-1998 combines the two national standards of magnesia and high-quality magnesia into one standard sintered magnesia. Sintered magnesia is mainly calcined at high temperature from magnesite, brucite or magnesium hydroxide extracted from seawater. Strong resistance to hydration. When magnesite is calcined at 700-950 ℃, CO2 is released. The resulting magnesite is a soft porous material and cannot be used as a refractory material; magnesite calcined at 1550-1600 ℃ is called burnt magnesia. Magnesia. The burnt magnesia fired with natural magnesite as raw material is called sintered magnesia with high temperature equipment such as shaft kilns, rotary kilns and other high-temperature equipment. The sintered magnesia is divided into 18 brands according to its physical and chemical indicators See the national standard GB/T 2273-1998 for details. The molten magnesia is formed by smelting magnesite as raw materials and reaching a molten state by electric arc furnace cooling; the magnesia produced by extracting magnesia from seawater is called seawater magnesia.

High-purity magnesia is made of natural super-grade magnesite ore by flotation purification, light sintering, fine grinding, ball pressing and ultra-high temperature oil shaft kiln calcination. It is a high-quality raw material for making bricks and indeterminate refractories. The mid-grade magnesia is produced from light-burned magnesia with 97% MgO content as raw material, and is produced by processes such as ball pressing and high-temperature shaft kiln calcination. The product has a good degree of sintering and dense crystals. It is a high-quality raw material for the production of mid-range magnesia refractory products. It can also be used to manufacture various magnesia bricks, magnesia alumina bricks, ramming materials, charging materials, etc. Containing more impurities, it is used for paving the bottom of steelmaking furnace.