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[October 2002]
Ceramic Beads for Microgrinding and Microdispersion
SEPR says its recently launched ZIRPRO ceramic beads are finding use in the
grinding and dispersion of many industrial products, such as paints, inks,
agrochemicals, magnetic coatings, mineral fillers, dyes, pigments and
cosmetics.The beads are claimed to offer outstanding performance in:
* grinding various fine particles to a specified size distribution.
* ensuring homogeneous dispersion.
* enhancing the productivity of existing equipment.
* monitoring the operating conditions, for consistent and reproducible
formulations.
* Reducing costs through decreased wear on beads and mills, lower
consumption of energy and easier clean-up at change in formulation.
According to SEPR, the manufacturing processes give ZIRPRO beads the
essential qualities needed for all industrial grinding operations:* high specific gravity
* low wear and high shock resistance
* low abrasivity on equipment
* advantageous cost:performance ratio
Zirmil - yttria zirconia beads - are described as well suited for use in
horizontal mills and particularly in high energy mills. With a density of
5.9, Zirmil beads are 55% denser than typical ceramic beads and are produced
by the sintering of fine, uniform particle size mineral oxides into a
homogeneous and highly cohesive bead structure.The crystallographic and chemical compositions (93% zirconium oxide) is said
to contribute to outstanding wear resistance. Zirmil beads are currently
available in sizes from 0.7mm to 1.5mm. Sizes below 0.7mm and above 1.5mm
are due to follow.
ENDS