Effect of Changing Jaw Crusher Parameters on Granulometry and Static Angle of Repose of Crushed Aggregate

Abstract

Crushing is one of the important technological operations in the reduction of oversized pieces of utility material. It is of great importance in mineral processing, where the excavated material is processed into a final product or for the purpose of further treatment. There are several different types of industrial crushers. In practice, it is usually not possible to process the raw material into the desired product using only one machine; it is usually necessary to use several crushers, often in combination of two or more construction types. When the material is crushed, its grain composition and flow properties change. The change in these properties affects the way the material is handled, in particular its transport and storage. A systematic approach to the influence of crusher parameter settings on the flowability and granulometry of the resulting product has not yet been published. In this study, the effect of laboratory jaw crusher parameter settings on the granulometry and static angle of repose of different types of crushed aggregates was investigated. It was observed that changing the setting of the crusher gap width changes the ratio of dust and coarser particles of the crushed material, and this ratio has a significant effect on the changes in the static angle of repose of this material.

Keywords: Angle of repose; Comminution; Crushing; Granulometry; Jaw crusher.