April 2, 2020

Product development by powder mixing

Mixing of powders is considered an art: in contrast to liquids, powders often do not behave as a continuum. Furthermore, powders can be free flowing but they also can be cohesive, i.e. more energy should be applied to make these particles move. If we then add to this, that also the particle size and the density and the shape of the various components can differ, this all makes mixing powders not so straigtforward. As a consequence, mixing solid materials requires a deeper understandig of the materials, the materials properties, and the working principles of the equipment used.

In our field testing area, we have different types of mixing equipment for mixing powders from diffusion mixers such as cube mixers from 2-12 liters mixing volume, via convective mixers in the range of 5-20 liters mixing volume, up to high shear mixers in the range of 1-6 liters mixing volume. This enables to mix free flowing powder materials up to very cohesive materials in a wide range of mixing volumes.

The cube mixers we use are in stainless steel but also in a transparent version; the latter allows a visual impression of the mixing process and could also visually inform on the potential of segregation of the powdered product, which can negatively impact on the mixing quality. Coupled to our opportunities for product characterization, e.g. particle size analysis and segregation analysis, we can offer a full evaluation of your mixing process.