Insulating fire brick which has impurity will have a certain influence on its performance, so we should try to ensure the purity of raw material while processing and manufacturing Mullite insulating fire brick. Especially for insulating fire brick, impurity will affect its chemical performance and the service time while using in furnace. But how does impurity influence the quality of insulating fire brick?
1. iron oxides
Ferrous oxide will penetrate into mullite solution, although it has a little effect on the melting point of mullite insulating fire brick, but will gradually stripped of impurities dyed dark, increasing the glass content, and reducing the fire-resistance.
2. Too much alkaline metal oxide will reduce the content of mullite, even serious damage mullite crystallization solution, meanwhile, it will produce more glass and influence the performance of mullite insulating fire brick.
3. Calcium oxide reduces light mullite crystallization effects, although little effect but need to pay more attention.
4. MgO will increase impurity in crystallization, so mullite content will decrease.
CCEWOOL DJM series mullite insulating brick, using high pure mullite as raw material, is made by adding alumina powder according to different type and then sintering in high temperature, manufacturing as per ASTM&JIS standard. Characterized with high compressive strength, thermal shock stability, low thermal conductivity. It can be widely used in industries such as metallurgy, petrochemical, machinery, ceramics and so on. It is an ideal product for longevity energy saving and efficiency enhancement.
