The difference between the spinel brick and silicon mullite brick

This is the two kinds of products: silicon refractory mullite brick, mullite bricks should be. The main component is aluminum and silicon, crystalline mullite to A3S2 (3AL2O3.2SIO2). The main ingredient is magnesium spinel or spinel, namely MGO and Al2O3.

Mullite brick belongs to the silicon aluminum brick, the main characteristic is thermal expansion coefficient is low, good resistance to thermal shock, resistance to wear and chemical corrosion resistance.

Belong to the mg Al spinel brick brick, is the main characteristics of anti erosion ability,refractory material, good abrasion resistance, good heat shock stability. Their bulk density higher than mullite stoned. However, there are problems of spinel water, may react with steam powder. In this sense, the mullite is more stable.

What is said above the silicon mullite brick has many advantages, but we choose to forget a little, it is the main cause of low thermal conductivity! Refractory materials but resistance to chemical attack ability is not very good, also thermal shock is not very good, for the following reasons, pressure and thermal shock is inverse proportion relationship.

The main characteristics of spinel brick is resistance to mechanical stress better, refractory material is suitable for use in near tyre. For the water problems in the above posts have said, please note that the coefficient of thermal conductivity!