Production process of fused zirconia corundum brick

 

1) Raw materials of fused zirconia corundum brick: 

Raw materials such as alumina powder, zircon sand and desiliconized zirconium and other raw materials, which are accepted after acceptance and stored for use or sent to raw materials for pretreatment.

 

2) Raw material proportioning of fused zirconia corundum brick: 

After the raw materials are processed in the workshop, the raw materials will be proportioned for use according to different product requirements.

 

3) Melting process of fused zirconia corundum brick: 

In accordance with the requirements of the production plan, the matched raw materials of fused zirconium corundum are added to the automatically controlled electric arc furnace and melted under the best conditions. Use single-phase or three-phase electric arc furnace to melt and mix with industrial alumina zircon concentrate solvent and quartz sand binder ingredients for mixing, melting and casting. The key to the melting process is to maintain a stable melting temperature system to obtain a melt with uniform chemical composition, low carbon content, a certain temperature and good casting properties.

 

4) Casting process of fused zirconia corundum brick: 

Pour the molten material into a specially designed product mold. A fused cast electric fusion brick with compact structure and good performance is made. When casting with a suitably overheated melt, the shrinkage cavities of the zirconia corundum bricks are concentrated, the thickness of the dense zone increases, and the density of the entire product also increases. However, when the degree of overheating is too high, although the density of the culture body increases, it is easy to cause cracks and large shrinkage holes in the product.

 

5) Heat preservation and annealing process of fused zirconia corundum brick: 

Slowly cool the cast bricks to grow the crystals of the fused zirconia corundum bricks and form the best structure. Usually, an incubator filled with diatomaceous earth and other thermal insulation materials is used for annealing with molds, or an adjustable temperature resistance furnace or tunnel kiln is used for annealing with molds or demolding according to a certain temperature system. The initial annealing temperature and holding conditions have a significant effect on the annealing effect.

 

6) Demold process of fused zirconia corundum brick: 

The annealed fused-cast zirconium corundum bricks are taken out of the cavity by equipment for product inspection.

 

7) Machinical processing procedure of fused zirconia corundum brick: 

Check the appearance defects, brick size, and surface accuracy of the bricks one by one, and perform high-precision grinding according to user requirements to ensure the size and surface accuracy of the bricks. After processing, it is pre-assembled to ensure that the product size is packaged and shipped.