Comparison of Wet and Dry Grinding in Electromagnetic Mill

Marta Wołosiewicz-Głąb,Zbigniew Ogonowski,Dariusz Foszcz,Marek Pawełczyk,Szymon Ogonowski

doi:10.3390/min8040138

Marta Wołosiewicz-Głąb, Zbigniew Ogonowski + Show 3 more

Open Access

https://doi.org/10.3390/min8040138

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Abstract

Comparison of dry and wet grinding process in an electromagnetic mill is presented in this paper. The research was conducted in a batch copper ore grinding. Batch mode allows for precise parametrization and constant repetitive conditions of the experiments. The following key aspects were tested: processing time, feed size, size of the grinding media, mass of the material and graining media, and density of the pulp. The particles size distribution of the product samples was analyzed in the laboratory after each experiment. The paper discusses the experimental results as well as the concept of dry and wet grinding and classification circuits for the electromagnetic mill. The main points of the discussion are the size reduction effectiveness and power consumption of the entire system.

Highlights

Comminution is one of the most energy-consuming technological processes, which aims to bring the material to the desired particle size [1,2,3]
One can notice that the increase in size reduction is most visible when the processing time is increased from 5 to 10 s
The methodology of batch grinding in electromagnetic mill (EMM) has proven to be effective for the purpose of comparing different process parameters

Summary

Introduction

Comminution is one of the most energy-consuming technological processes, which aims to bring the material to the desired particle size [1,2,3]. The analysis of comminution consists of establishing the relations between the particle size distribution of products, the physical properties of the material, the comminution energy consumption and the parameters of the machines [4]. Comminution of raw material is carried out for two main reasons [1,5]: obtaining a final product, according to the requirements (main operation in the case of aggregates) and, mineral liberation, that is, bringing the material to such a state that it liberates the injection of the useful ingredient from the gangue (preparatory operation to a beneficiation process). The choice of the machine is usually determined by the feed particles size and the requirements for the product

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Results

Conclusion