The Main Differences Between Silica Molybdenum Bricks and Magnesia-alumina Spinel Bricks

Silica molybdenum bricks and magnesia-alumina spinel bricks are two different types of refractory bricks. They have some major differences in material composition and application fields.

Material Composition
Physical and chemical properties of silica molybdenum bricks. The “silicon” in silica molybdenum bricks refers to silicon carbide, and “moly” refers to mullite. Silica hemolysin bricks are made by sintering with high alumina bauxite and silicon carbide as the main raw materials. Refractory bricks. Essentially, silica molybdenum brick is just a high-alumina brick with silicon carbide added. Among them, some products may be mixed with refractory raw materials such as mullite, “three stones” and corundum.

Magnesia-alumina spinel bricks: Magnesium-alumina spinel bricks are a type of alkaline refractory bricks. They mainly include unfired and fired block bricks. Spinels can also be synthesized to make amorphous refractory materials to form an overall structure. and gunned lining. The production process of magnesia-alumina spinel bricks is the same as that of ordinary magnesia bricks.

Use
Silica molybdenum bricks: Suitable for high-temperature environments such as high-temperature industrial furnaces and electric furnaces, and have good thermal shock resistance and fire resistance.
Magnesia-alumina spinel bricks: Mainly used in industrial furnaces with high refractory requirements such as cement kilns and glass kilns, especially under alkaline conditions, because spinel has a certain resistance to alkaline materials.

Performance Characteristics
Silica molybdenum brick: It has a high heat resistance and fire resistance, and has high thermal shock stability requirements under high-temperature conditions.
Magnesia-aluminum spinel brick: It has good alkali resistance and corrosion resistance, and is suitable for environments with a lot of alkaline substances.

Price: Due to different material compositions and preparation processes, the prices of the two may differ. The specific situation depends on factors such as market supply and demand and production processes.

Generally speaking, silica molybdenum bricks are mainly used in high-temperature industrial furnaces, while magnesia-aluminum spinel bricks are more suitable for specific industrial furnaces, especially high-temperature conditions in alkaline environments. Selecting the appropriate refractory brick depends on the specific application requirements and work environment.