Three real factors controlling the choice of grinding media:
How big it is, (diameter, usually expressed in millimeters or mesh size)
How heavy it is, (specific gravity, typically in g/cm3)
What it is made of (strength, wear life, abrasiveness, inertness, cost)
Of these, only size and density control its ability to disperse, the other factors being secondary. In other words, for a given size and given density, the material of which the bead is made makes no difference in its ability to disperse.
grinding media include zirconia grinding media,alumina grinding media,kalin bead,etc.
Alumina Grinding Media
irconia is one of the most studied ceramic materials. Zirconium dioxide (in its most naturally occurring form) is the mineral baddeleyite. Zirconia begins its life following a thermal treatment process (calcining) of the zirconium dioxide. This zirconia is further processed into different forms, including powder. Ceramco’s zirconia formulations utilize a “ready to press” type of zirconia powder for its near-net shaping manufacturing process.
With a melting point of 2715°C and a boiling point of 4300°C, pure zirconia is extremely tough. However, when heated, phase changes in its physical characteristics reveal a weakness. In its tetragonal phase the expansion of a pure zirconia part results in internal stresses, leading to cracks. This inherent weakness is corrected with the addition of a stabilizer, such as yttria (Yttrium oxide, Y2O3), producing YTZP, a yttria partially stabilized zirconia.
A part made of YTZP zirconia remains stable as is moves from its monoclinic (room temperature) phase to its tetragonal (heated) phase and back again, resulting in lessened expansion, and minimal crack propagation. These changes are referred to as Transformation Toughening.
Alumina grinding media
High strength, high hardness, wear resistance, corrosion resistance and other characteristics, widely used in building sanitary ceramics, industrial ceramics, electronic ceramics, high-grade refractory materials, special cement, non-metallic mineral products, chemical and pharmaceutical, coatings and other industries.
A. The product has high density and high hardness, which can greatly improve the grinding and grinding efficiency, and save electricity by 30% -40%.
B. The product has good abrasion resistance, which can ensure the purity of the crushed material, and its abrasion resistance is 30-40 times higher than traditional ball stones.
C. It can reduce the thickness of the mill lining, increase the effective volume of the mill by 20-40%, and increase the production capacity of the mill.
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Post time: Jan-10-2020