Tytov O.O., Sukhariev V.V., Sushchenko O.I. Experimental research of efficiency of the crusher with wave profile of rolls during destruction of lamellar pieces

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Parent Category: Geo-Technical Mechanics, 2022

Category: Geo-Technical Mechanics, 2022, Issue 160

Geoteh. meh. 2022, 160, 71-79

https://doi.org/10.15407/geotm2022.160.071

 

EXPERIMENTAL RESEARCH OF EFFICIENCY OF THE CRUSHER WITH WAVE PROFILE OF ROLLS DURING DESTRUCTION OF LAMELLAR PIECES

¹Tytov O.O., ¹Sukhariev V.V., ¹Sushchenko O.I.

¹Institute of Geotechnical Mechanics named by N. Poljakov of National Academy of Sciences of Ukraine 

UDC 621.926: 622.7

Language: English

Abstract. The purpose of this work is to confirm experimentally the fact that crushers with a wave profile of rolls have improved efficiency to reduce the yield of lamellar pieces in lump materials compared to conventional equipment such as cone crushers and other types of crushers. In addition, it is necessary to identify the target size classes, for which, first of all, it is necessary to reduce the yield of lamellar pieces they are included. Here, the evaluation of efficiency of processing of the rock mass having increased yield of lamellar pieces was carried out based on the analysis of change in the amount of lamellar pieces yield in narrow fractions of feed material and crushing products. The latter was carried out by passing the pieces sequentially through round and slit sieves to obtain so-called subfractions. During the experiment, a two-roll crusher equipped with bands of the original wave profile design has been used. It allows effective use of schemes for pieces destruction under bending loads. These loads are the more effective, the larger a piece shape differs from the isometric one. The starting material has been 10-25 mm quartzite classified by subfractions having the yield of lamellar pieces from 0 to 91%. The obtained results confirmed, that the smallest yield of lamellar pieces has for the target fraction of products with a size of 1-2 width of the gap between the ledges of crusher rolls, almost independently on the lamellar yield and the size of feed material. The result of the work is also a proposed and tested in practice method for determining the yield of lamellar pieces for narrow fractions of material by sequential sieving on round and slit sieves. Note here, that piecemeal -linear nature of the dependence for the yield of lamellar pieces in narrow fractions of material on the ratio of the average size of slit sieve to the average size of round sieve for mentioned fractions is established. It has been shown, that the lamellar yield of crushing products is effectively reduced for all feed subfractions, with the exception of those containing practically only non-lamellar particles. Improved efficiency of the crusher with wave profile of rolls has been proved, in comparison with conventional equipment, when working with small degrees of crushing. Here, the destruction of mainly lamellar pieces and the minimal re-grinding of non-lamellar pieces is achieved.
Keywords: roll crusher, wave profile, bending load, lamellar piece, slit sieve.

REFERENCES:

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About authors:

Tytov Oleksandr Oleksandrovych, Candidate of Technical Sciences (Ph.D.), Associate Professor, Researcher in Department of Mechanics of Machines and Processes of Mineral Processes, Institute of Geotechnical Mechanics named by N. Poljakov of National Academy of Sciences of Ukraine (IGTM NAS of Ukraine), Dnipro, Ukraine, This email address is being protected from spambots. You need JavaScript enabled to view it.

Sukharіev Vitaliі Vitaliіovych, Candidate of Technical Sciences (Ph.D.), Senior Researcher in Department of Mechanics of Mineral Processing Machines and Processes, Institute of Geotechnical Mechanics named by N. Poljakov of National Academy of Sciences of Ukraine (IGTM NAS of Ukraine), Dnipro, Ukraine,  This email address is being protected from spambots. You need JavaScript enabled to view it.

Sushchenko Oleksandr Ivanovych, Chief Engineer in Department of Mechanics of Mineral Processing Machines and Processes, Institute of Geotechnical Mechanics named by N. Poljakov of National Academy of Sciences of Ukraine (IGTM NAS of Ukraine), Dnipro, Ukraine, This email address is being protected from spambots. You need JavaScript enabled to view it.

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