The main characteristics of fused magnesia products are: complete structure, compact structure, high melting point (up to 2800 C), stable chemical performance, high compressive strength, strong insulation, erosion resistance and corrosion resistance. It is an important raw material for metallurgy, building materials, light industry, furnace lining and bulk materials, as well as indispensable heavy metallurgy industries such as steel, cement, glass and non-ferrous metal smelting. Refractories are required.
The fused magnesia is mainly made from magnesite ore with a content of more than 47% by melting in an electric arc furnace. The chemical indexes of fused magnesia can be divided into six items: 1. magnesia content; 2. silica content; 3. ferric oxide content; 4. aluminium oxide content; 5. caustic soda; 6. bulk density; fused magnesia product has high purity, large crystalline grains, compact structure, strong slag resistance, good thermal shock stability, and is an excellent high-temperature electrical insulating material, as well as high-grade magnesium production. Bricks, magnesia-carbon bricks and important raw materials of amorphous refractories.
Main uses of fused magnesia: fused magnesia can be mainly used as auxiliary refractories such as gunning material, ramming material, etc. and electrical grade magnesia powder of flow steel mouth brick, magnesia brick, magnesia chrome brick, 97 fused magnesia sand, 98 fused magnesia sand and other special refractory bricks. It can also be used as refractory lining in vacuum and non-vacuum induction furnaces and electric arc furnaces. It is an ideal raw material for making magnesia crucible, furnace gallbladder and various high temperature casing.
Production process of large crystalline fused magnesia: large crystalline fused magnesia is mainly made by melting magnesia particles with 91% - 92% content and 0 mm - 3 mm size in electric arc furnace. The product has high purity, large grain size, compact structure, strong slag resistance and good thermal shock stability. It is an excellent high-temperature electrical insulation material, and also an important raw material for making high-grade magnesia brick, magnesia-carbon brick and amorphous refractories. It is widely used in metallurgy, chemical industry, national defense, scientific research, aerospace, household electrical appliances, etc.
Large crystalline fused magnesia product characteristics: high purity, large melting grain, high point, compact structure; good thermal shock stability; good high temperature flexural strength; good slag resistance and corrosion resistance; strong thermal conductivity, high insulation.
Usage of large crystalline fused magnesia products: large crystalline fused magnesia is used for refractory lining of steelmaking furnace. It is a high-quality and high-grade alkaline refractory material for refractory bricks and amorphous refractories. It can also be used as filler for making thermocouples and thermal insulation materials (household appliances, etc.). It can also be used for ceramic raw materials and sintering aids as well as metallurgy, building materials, chemical industry, national defense and medical devices. And so on.