WFA aggregate & WFA castable

White fused alumina (briefly WFA) is a common refractory material. It works as refractory aggregates and refractory castables a lot. Let’s explore the relationship between WFA aggregate and WFA castable.

Shaped refractory products and ladle lining & ladle bases are applications in steel making and furnace building.   Refractory raw materials get mixed up with large particles and small particles. The large particles act as support. They are like the skeleton of the material. So big grains are called refractory aggregates. The small particles play a filling role, filling the gaps between the aggregates. The high-temperature molten steel contact with the ladle lining for a long time in steel ladles. Therefore, the texture of the lining should be as tight as possible. That feature can prevent the erosion and impact of the molten steel at high temperatures. Thus prolong the service life of the refractory products.

White fused alumina can resistant to high temperatures at about 1850-1900 ℃. It has strong chemical stability, high bulk density (3.55-3.6g/cm3). Furthermore, WFA is resistant to chemical corrosion. It is an excellent alumina refractory raw material.

In particular, specifications of WFA aggregate are: 0-1mm, 0.2-0.6mm, 1-3mm, 3-5mm, 5-8mm.

Specifications of WFA castables are: 200F, 220F, 270F, 325F.