Abstract
The paper concerns investigation of the effect of impact crusher operation on selected qualitative characteristics of mineral aggregate products. Qualitative characteristics of crushing products in terms of size reduction ratio and fine particles contents were analyzed from the point of view of operational parameters of the impact crusher. An investigative program was carried out on a plant scale and two primary parameters of the impactor were analyzed: velocity of the crusher rotor and the width of the outlet gap. The models of the crushing device operation were built separately for each type of the tested material, as well as for general conditions.
Highlights
Production of mineral aggregates is realized in processing circuits that use mostly crushing and screening operations
Properties of the feed material seem to be of crucial impact on the quality of obtained products, especially in terms of strength characteristics of specific fractions of aggregates or quality of produced concrete and asphalt mixtures [2,3,4]
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Summary
Production of mineral aggregates is realized in processing circuits that use mostly crushing and screening operations These relatively simple systems require a certain control and need to be adopted to the characteristics of the feed material as well as to expected technological outcomes [1]. The crushing process is of key significance in the aggregate processing sector but is of a special concern in raw materials treatment, in general In ore processing it applies both crushing and grinding operations, for the reason they are energy consuming, and breakage effectiveness is relatively low, especially in grinding operations in tumble mills [16]. It leads to deterioration of the living standards of inhabitants in the vicinity of mineral processing plants and constitutes a potential health risk for mine workers [24]
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