Effect of material bed compression on white fused corundum product particle shape and bulk density

• Published in: Open ceramics 2023-12, Vol.16, p.100489, Article 100489
• Main Authors: Tamás, László, Rácz, Ádám
• Format: Article
• Language: English
• Subjects: Corundum; HPGR; Particle bed compression
• ISSN: 2666-5395; 2666-5395
• DOI: 10.1016/j.oceram.2023.100489

Comminution of corundum is a challenging task, as it has outstanding mechanical strength and is highly abrasive and is consequently applied as a blasting and polishing agent in the abrasive industry. Thus, the selection of the best comminution methods to achieve the required dispersity properties has great importance. For this, first we must understand the effects of different type of stresses and their influence on the corundum particle fractions. Laboratory scale material bed compression experiments in a piston press were carried out to examine the effect of the pressure and material bed height on the product's particle size distribution, bulk density, and particle shape. The results showed that outstanding yield, high bulk density, and spherical particle shape can be achieved by particle bed breakage in a piston press, so the high-pressure grinding roll (HPGR) technology is a promising comminution method for corundum. [Display omitted] •Outstanding reduction ratio achieved by material bed compression breakage mode.•Desired bulk properties achieved for abrasive industry's requirements.•New evaluation method to assess the bulk density and particle sphericity relation.•Material bed compression successfully used to produce a desired particle shape.