National University of Science and Technology MISIS (Moscow, Russia)

I. I. Basyrov, Senior Lecturer, basirovilnur@mail.ru
N. A. Chichenev, Dr. Eng., Prof., chich38@mail.ru
O. A. Kobelev, Dr. Eng., Prof., o-kobelev@yandex.ru
O. N. Chicheneva, Cand. Eng., Associate Prof., ch-grafika@mail.ru

This paper examines issues related to crushing and grinding processes in beneficiation plants. These processes serve as preparatory operations before ore beneficiation, with the goal of separating the grains of various minerals contained in the ore, which are closely intertwined and intergrown. It is noted that roller crushers used in industry have a simpler design and lower specific energy consumption compared to crushers of other types. One promising area is the reconstruction of ore preparation systems using roller crushers with vertical cone-shaped rolls, in which the discharge gap continuously decreases in the axial direction, allowing for size reduction by crushing with the presence of an attrition effect. This article proposes a method for determining the roll sizes in roller crushers with vertical cone-shaped rolls, which are used at the fine crushing stage. For the first time, the dependence of the working section length of cone rolls in a roller crusher with vertical cone-shaped rolls on the crushing ratio and the roll cone angle is obtained. Recommendations are given for selecting the minimum and maximum diameters of the working section of cone rolls. The relationship between the distance between the axes of the cone rolls in a roller crusher with vertical cone-shaped rolls and the crushing ratio and the initial diameter of the working section of the roll is determined. A method for determining roll sizes and roll center distances was used to develop a physical model of a vertical cone roller crusher. This model will be used to conduct experimental crushing operations to identify differences in crushed products from those produced by conventional crushing devices, such as jaw, cone, horizontal roller, and hammer crushers. This will then be used to study the completeness of mineral liberation, the nature of crushed product destruction, particle size distribution, and energy efficiency.

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