Why Is Corundum Refractory Castable So Expensive?

There are many reasons why corundum refractory castable is so expensive. Usually, its price is 2-3 times higher than that of ordinary high-alumina bricks. So what are the reasons for its high price? Today, the editor will give a brief introduction:

1. High cost of raw materials

The raw material of corundum refractory castable is mainly corundum. Corundum is a high-purity, high-quality refractory mineral. Its mining and purification process is relatively complicated. Not only that, the alumina content in corundum bricks generally needs to reach more than 90%, which requires the purity of corundum to be high enough to meet this standard. At present, my country’s corundum storage resources are relatively small, and the mineral content in the ore is relatively low. At present, artificial corundum is still the main one used on the market, so the cost of corundum raw materials remains high.

2. Complex production process

The production process of corundum refractory castables is relatively complex and generally has high requirements for the process. Only in this way can the standard of more than 90% content be met, and the proportion of corundum refractory castables also needs to be very precise, so producers need to invest a lot of research and development and operating equipment, which is undoubtedly another increase in cost.

Although the price of corundum refractory castables is relatively expensive, it does have performance that ordinary refractory castables cannot achieve. It has significantly improved in fire resistance, corrosion resistance, wear resistance, thermal shock stability, etc. For ordinary refractory castables, it can still maintain stable performance in extreme environments such as high temperatures and strong chemical erosion and can meet the requirements of many demanding industrial applications. Therefore, it is often used in some key parts of high-temperature industrial kilns.