The sintering process of 1. tabular corundum is a solid-state sintering process, which makes the powder produce strength through material migration, leading to densification and recrystallization.
2. The density of tabular corundum semi-finished balls is an important factor affecting the sintering effect of products. The improvement of semi-finished ball density is to change the contact state between powder particles, shorten the distance between particles, increase the contact area, improve the speed and efficiency of energy transfer between solid phases, and thus improve the sintering effect.
3. To obtain a compact semi-finished ball. The powder material is discharged and rolled in the rotating multi-layer granulating drum, while the atomized binder is added. Under the rotation of the drum, the material is rolled into balls, and under the action of the bidirectional feeder, the material is circulated in the granulator in a bidirectional closed loop.
4. Pellets with different particle sizes and non-granulated powder are classified by the screening drum, and the large-particle pellets are discharged as finished products after granulation, while the small-particle pellets and powder are returned to the granulation drum to continue granulation, and the pellets are continuously rolled by the granulation drum in the process of bidirectional circulation to become compact balls with smooth surfaces.