Authors: D.O. Shpankova, S.A. Mayorov, Yu.A. Lagunova

Title of the article: Analysis of the geometric shape of crushing plates in laboratory jaw crushers

Year: 2025, Issue: 6, Pages: 34-41

Branch of knowledge: 2.8.8. Geotechnology, Mining machines (engineering)

Index UDK: 622.271

DOI: 10.26730/1816-4528-2025-6-34-41

Abstract: Laboratory jaw crushers, due to their compactness and technical flexibility, are an optimal platform for applied research and design experiments. In conditions of laboratory sample preparation, which require high accuracy, reproducibility of results and the ability to adapt the equipment to various physical and mechanical properties of the analyzed material, the study of the geometric shape (design) of the crushing jaw armor is a very urgent task. The article presents the results of an experimental study of the effect of the geometric shape of the crushing jaws on the efficiency of processing ores of different hardness in laboratory jaw crushers. A comparison of crushers of the SVITICH-3 (with flat armor plates) and ЩД 10М (with toothed armor plates) models is carried out in crushing three types of rocks: granite, marble and limestone. The curves of the characteristics of the granulometric composition of crushing products of different hardness are plotted. The aim of the study is to substantiate the need to develop a new design of a crushing jaw that combines the advantages of both toothed and flat geometry to obtain the best crushing product. Promising versions of modular plates with cut-in wear-resistant elements of various configurations are proposed. A significant amount of experimental data has been obtained. The results confirm a significant effect of plate geometry on the productivity and uniformity of crushing, which is the basis for further improvement of the design of laboratory-scale crushers. Tests and preliminary experimental studies have confirmed that the obtained results are adequate to the crushing processes in real machines and correspond to changes in operating conditions. A basis has been created for the next stage of research related to the assessment of the stress-strain state of various configurations of crushing jaw armor.

Key words: jaw crusher crushing plates jaw shape granulometric composition crushing efficiency laboratory tests

Receiving date: 31.10.2025

Approval date: 14.11.2025

Publication date: 18.12.2025

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