Authors: A.B. Maksimov, D.I. Shishlyannikov

Title of the article: Improving the quality of granulometric composition of the pot-ash ore mined by heading-and-winning machines «Ural-20R»

Year: 2018, Issue: 4, Pages: 4-11

Index UDK: 622.232.72

DOI: 10.26730/1816-4528-2018-4-4-11

Abstract: The processes of cutting and moving potassium ore during the operation of the «Ural-20R» tunneling com-bines are accompanied by the crushing. This leads to an increase in the number of unenriched pulverulent classes (par-ticle size less than 0,25 mm) in breakage products. The presence of particles of this size class has an effect on the degree of recovery of the useful component during enrichment. this determines the decline in profits of the mining enterprise. Improving the quality of the granulometric composition of ore by increasing the mass part of enrichment classes in it is an actual scientific and practical task, the solution of which is possible by justifying the rational parameters of the rock-destroying executive bodies and the loading equipment of the «Ural-20R» combines as well as the development and implementation of executive bodies that implement perspective cutting schemes. The analysis of sources of formation of dust-like classes at work of the «Ural-20R» combines has been executed. Defined the field of rational (minimum output of pulverized classes) parameters values of destruction of potash array when using chess and sequential cutting schemes. The analysis of correspondence of parameters of work of planetary-disk Executive bodies of combines «Ural-20R» of various modifications to rational parameters of cutting was carried out. The technical proposals for the improvement of the executive bodies of the combines «Ural-20R» by using cross schema of the destruction of the potash array were presented. Proved that the proposed technical solutions will to improve the quality of the ore and reduce the specific energy consumption of the process of destruction.

Key words: heading-and-winning machine destruction of the potassium array granulometric composition of ore dust formation during the operation of a heading-and-winning machine cross cutting

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