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All of us has known that fused cast azs block is produced by casting method, which makes the fused cast azs block form many excellent properties, however, the operation in casting process has great influence on the quality of fused cast azs block, and it not only affects the appearance of fused cast azs block, but also directly affects the inner quality of fused cast azs block. The characteristics in casting operation process are as below:

Formation of shrinkage cavity: In the mold, the molten liquid occurs when the self - shaped wall begins to solidify. If the molten liquid reduces caused by the liquid shrinkage and solid shrinkage and don't get added, which will form concentrated shrinkage cavity in the place of final solidification of fused cast azs block.

The physical and chemical reactions in melting process of fused cast azs block are as below:

1. Alumina
The liquid is crystallized to corundum when cooling

2. Zirconite
it mainly contents zirconium silicate which is decomposed as below:
The melting point of zirconite is 2430 degree, but with the help of flux, the temperature do not need so high, in a word zircon is transferred to baddeleyite from low temperature crystal to high temperature crystal.

3. Soda ash and borax

The specific production flow of fused cast azs block is as below:

1. Proportion the raw material
Pre-treat the raw material of oxidized aluminum powder, zircon sand and zirconium and other raw materials, proportion them with computer according to different type of fused cast azs block.

2. Melting in electronic furnace