98 fused magnesia

Alkaline refractory raw materials made of natural magnesite, light-burned magnesia (containing natural or sea (brine) water) or sintered magnesia melted by electric arc furnace. It is calcined at high temperature from magnesite, brucite or magnesium hydroxide extracted from seawater. Strong resistance to hydration. 98 fused magnesia

Introduction

Fused magnesia is a general term for products produced by high-temperature treatment of magnesite materials such as magnesite to reach the sintering degree. Using high-temperature equipment such as shaft kiln, rotary kiln and other high-temperature equipment for one-step calcination or two-step calcination process, magnesia fired with natural magnesite as raw material is called sintered magnesia; magnesite, etc. as raw materials are smelted in an electric arc furnace to cool down The latter is called fused magnesia; the one made by extracting magnesium oxide from seawater is called seawater magnesia. Magnesia is one of the most important raw materials for refractory materials, which is used to manufacture various magnesia bricks, magnesia alumina bricks, ramming materials, and repairing materials. Containing more impurities, it is used for paving the bottom of steelmaking furnace.

High-purity magnesia is made by flotation and purification of natural extra-grade magnesite ore, which is lightly burned, finely ground, pressed ball, and calcined in an ultra-high temperature oil shaft kiln. 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 good sintering degree and dense crystals. It is a high-quality raw material for the production of mid-range magnesia refractory products.

Fused magnesia is made by fusing selected special A-grade natural magnesite or high-purity light-burned magnesia particles in an electric arc furnace. The product has high purity, large crystal grains, dense structure, strong slag resistance, and good thermal shock stability. It is an excellent high-temperature electrical insulation material, and it is also used to make high-grade magnesia bricks, magnesia carbon bricks and unshaped refractory materials. Important raw materials.