Research on the Grinding Energy Density in a Jet Mill.

Dariusz Urbaniak,Tomasz Wyleciał,Vladimir Pavlovich Zhukov,Aleksei Yevgenyevich Barochkin,Henryk Otwinowski,Jarosław Boryca

doi:10.3390/ma14082008

Dariusz Urbaniak, Tomasz Wyleciał + Show 4 more

Open Access

https://doi.org/10.3390/ma14082008

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Abstract

Raw materials are used in many industrial technologies. The raw material frequently has to be prepared as an intermediate with an appropriate particle size distribution, which requires the use of grinding. In grinding processes, energy consumption is a very important profitability criterion for the applied particular size reduction technology. The paper describes the comminution process that takes place in the jet mill using a modified form of the thermodynamic theory of grinding. In this theory, new material characteristics have been added: the surface and volumetric density of grinding energy. The thermodynamic theory is a combination of the classical Kick’s theory and the modified form of Rittinger’s theory. The tested physical magnitudes are a measure of the energy consumption of the grinding process. They describe the energy that must be provided in the grinding process to overcome interactions between particles related to the volume and surface of the material. Knowledge of these magnitudes is necessary to model thermomechanical phenomena in the solid state. The paper presents the results of research on comminution in a jet mill, on the basis of which the values of the tested material magnitudes were determined. It is graphically shown how the values of the tested magnitudes depend on the grain size of the ground samples.

Highlights

There are efforts to implement technological processes that would fit into the model of the closed cycle economy
The faster the economy started to gallop in its development, the faster it led to the depletion of raw materials and a growing demand for energy
This paper presents the results of research on the comminution process in a jet mill

Summary

Introduction

There are efforts to implement technological processes that would fit into the model of the closed cycle economy. The existing models of manufacturing of various goods have not always led one to seek savings, both in terms of the used raw materials and energy saving The product of such manufacturing processes was valuable as long as it met specific needs. Unnecessary goods have come to be seen in the context of the potential recovery of energy used in the prior generation phase in order to save the amount of energy needed to produce a new good Another aspect of the circular economy is looking for solutions that reduce the energy consumption of production processes for their energy optimization. An analysis of the literature shows that continuous research on grinding theories is still needed These studies are of particular importance for the implementation of technological processes under the aspect of the circular economy. Understanding the complex grinding processes will optimize these processes, saving both raw materials and energy

A Modified Form of the Thermodynamic Theory of Grinding

Determination of Material Characteristics

Research in the Jet Mill

Results

Conclusions