# Modeling of realistic microstructures on the basis of quantitative mineralogical analyses

Technische Universität Bergakademie Freiberg

Dr. Michael Klichowicz studied mechanical engineering at the Technische Universität Bergakademie Freiberg, where he specialized in mineral processing, special foundation engineering and mining machines. His master’s thesis received the Klaus Schönert Prize of the VDMA and was awarded by the Stiftung Lausitzer Braunkohle for its outstanding quality. Michael Klichowicz was also VDMA-certified as an engineer for mineral-processing machines and plant engineering. Michael Klichowicz then worked as a research fellow at the Institute of Mineral-Processing Machines in Freiberg and published his PhD thesis in 2020. He is currently a postdoctoral researcher at the Institute.

### Expertise

- Mineral processing
- Discrete element simulation
- Microstructure modeling

### Of interest to

- Mineral-processing engineers
- Mineralogists
- Geologists

### Interview

**Russell Alt-Haaker**

Author

Author

In your dissertation, you look at how to make comminution technology more efficient. What exactly is comminution, and what is it used for?

**Michael Klichowicz**

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## Keywords

Mineral, processing, comminution, fracture behavior, ore processing, discrete element method, microstructure, fracture propagation, mineral microstructure, computer simulation, quantitative microstructure analysis, sustainability

## Abstract

This research aims to make it possible to use realistic mineral microstructures in simulations of mineral processing. In particular, comminution processes, such as the crushing and grinding of raw mineral materials, are highly affected by the mineral microstructure, since the texture and structure of the many grains and their micromechanical properties determine the macroscopic fracture behavior.

To illustrate this, consider a mineral material that essentially consists of grains of two different mineral phases, such as quartz and feldspar. If the micromechanical properties of these two phases are different, this will likely have an impact on the macroscopic fracture behavior. Assuming that the grains of one of the minerals break at lower loads, it is likely that a crack through a stone of that material will spread through the weaker grains. In fact, this is an important property for ore processing. In order to extract valuable minerals from an ore, it is important to liberate them from the commercially worthless material in which they are found. For this, it is essential to know and understand how the material breaks at grain-size level.

To be able to simulate this breakage, it is important to use realistic models of the mineral microstructures. This study demonstrates how such realistic two-dimensional microstructures can be generated on the computer based on quantitative microstructural analysis. Furthermore, the study shows how these synthetic microstructures can then be incorporated into the well-established discrete element method, where the breakage of mineral material can be simulated at grain-size level.

#### Suggested citation

Klichowicz, Michael. *Modeling of realistic microstructures on the basis of quantitative mineralogical analyses*. Berlin: DUZ Verlags- und Medienhaus, 2020.

#### Repository

tubaf.qucosa.de#### Identifiers

■978-3-96037-342-1