The efficiency of the froth flotation process depends on the encoun­ter of particle and bubbles based on the hydrodynamics within the cell and the surface chemistry of the pulp for the film rupture during the attachment process.

The motion of hydrophobic valuable mineral particles in the froth is decisive for the reco­­very rate in flotation while the motion of hydrophilic particles strongly influences the grade of the concentrate. Particle motion is investigated in our group by new techniques.

The removal of non-metallic inclusions from liquid metal alloys by means of gas bubbles is important to ensure clean and high-quality structural materials. The project aims on a bet­ter understanding of interactions, e.g. collision and attachment, between bubbles and inclusions.

To remove ­very small particles from suspension an upscaling of their sizes, e.g. by stimulating their attachment to larger carrier particles (e.g. calcite for collecting TiO2 fines) is desirable. Currently, works with magnetic carrier particles are ongoing.