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Thesis Powder and Slurry Processes

 

Continuous dry ball milling with grinding aids additives

In dry fine grinding processes the relevance of particle-particle interactions rises with increasing product fineness. These particle-particle interactions promotes agglomeration of fine material, reducing the grinding efficiency and complicating the process control. The understanding of particle agglomeration and its relation with process parameters would help in better prediction of industrial process results. mehr


Modelling of shear stresses effects on particles attrition

In this sense, this work proposes to determine an empirical relation between applied shear stresses in bulk particles and the fragments generated from breakage. mehr

Flowability Characterisation of Biomass and Fibrous Particles in a New Failure Test Apparatus

The interest in topics like recycling, biomass or fibre reinforced materials increases strongly. New processes and materials are attended with the upcoming questions of reliable storing ,
conveying and dosing devices. An important yet difficult aspect of this is the prediction of the flowability of non spherical particles because conventional methods have not shown trustworthy results for these particles. mehr

Evaluation of the Limits of Ring Shear Testing / Testing a New Adaptable Lid

The interest in topics like recycling, biomass or fibre reinforced materials increases strongly. New processes and materials are attended with the upcoming questions of reliable storing, conveying and dosing devices. While conventional shear Tests work well for a lot of particles, elongated particles lead to varying results depending on different factors such as filling. mehr

Modelling of particles agglomeration in dry grinding

This project proposes a preliminary model for fine particles agglomeration. The steps project include a literature review, experimental work and formulation of a empirical or fundamental model. mehr

Modelling of cycling processes in a stirred media mill

Within this thesis, the circulation mode should be investigated based on particle size distribution and residence time in a stirred media mill. For this matter, the rotational speed and the volume flow will be varied systematically. Furthermore, it is of interest to vary through the mass concentration and grinding charge the stress energy in the mill.
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Influence of viscosity in a stirred media mill

Within this thesis, viscosities should be varied through model fluids and it should be obtained the influence of temperature and viscosity on the grinding bead movement. Through the variation of volume flow and stirrer speed, there will be different temperatures within the mill. more


Team Members

Current Projects

Ultra-fine grinding of multi-component systems in stirred media mills more

Future Grinding Technologies more

InnoRec – Innovative recycling processes for new lithium cell Generations more

Charge-based selective separation of submicron particles from grinding processes more

Development of surface tailored metal powders for increased production efficiency at the laser powder-bed fusion additive manufacturing process (PBF-LB/M) more

Silicon Graphite goes Industry more

Finished Projects
Nanogrinding of organic and inorganic materials more

Increase of the energy efficiency by controlling the flow properties and minimizing the agglomeration in dry fine grinding processes more