Master theses / Diploma theses / Compulsory internship
Competitive bubble-particle attachment from a particle mixture in a model stirred cell (Id 405)
No current offer!
Flotation is a widely used technique worldwide to extract valuable minerals from less valuable ones. To make the process more efficient, several methods have been developed to investigate how various factors affect particle floatability (recovery). Traditionally, this is done by measuring the hydrophobicity of the particles. However, floatability is a much broader concept that encompasses not only hydrophobicity but also other factors such as hydrodynamic conditions. In our research, we introduce a novel approach to quantify particle floatability from a mixture through dynamic bubble surface coverage experiments, considering hydrodynamic effects. Our focus is to understand how the different particles attach to a single bubble from a system containing two (or three) different particle types (chalcopyrite and/or pyrite + quartz). In particular, how one type of particle affects the recovery of another type.
Our objective is:
- To study the effect of pH and collector concentration on particle floatability.
- To establish a correlation between floatability and flotation recovery.
Experimental methods/techniques:
- Image acquisition and analysis
- Particle size analysis techniques such as laser diffraction and dynamic light scattering
Department:
Transport processes at interfaces
Contact: Dr. Eftekhari, Milad, Öktem, Gülce
Requirements
- duration min. 6 month, workplace: HZDR
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