Authors: K.V. Bochkova, V.S. Bochkov

Title of the article: Research of primary ore preparation at hard-to-access deposits

Year: 2021, Issue: 6, Pages: 26-31

Branch of knowledge: 05.05.06 Mining machines

Index UDK: 622.732

DOI: 10.26730/1816-4528-2021-6-26-31

Abstract: In Russia, as in the rest of the world, there is a depletion of deposits in places of traditional human habitation, which makes it necessary to search for the development of hard-to-reach deposits. Such deposits include deposits located in remote sparsely populated regions, and deposits located under high-strength overburden which can also be attributed to hard-to-reach deposits. In this regard, for the development of such deposits, it is necessary to study the technology, justify the use of one or another type of equipment. Of particular interest is the determination of the rational technology and parameters of the primary ore preparation directly at the deposit (in the open pit). For these purposes, according to the authors of this article, mobile crushing and screening complexes may be suitable, which allow you to quickly establish a technological process in hard-to-reach regions. Primary ore preparation, in turn, makes it possible to prepare ore to a size of 3-5 mm, which will ensure its cost-effective transportation to existing processing plants, which will allow using a minimum set of technological equipment in a hard-to-reach deposit. To substantiate the primary ore preparation directly in the quarry, the presented article analyzed the problem of setting up equipment for mobile sorting complexes that operate under non-stationary conditions at various, relatively small deposits of nonmetallic minerals, including dumps. In particular, experimental studies were carried out to identify dependencies connecting changes in the gap between the jaws of a jaw crusher and productivity using the example of the most common host rocks, such as marble from the Sarapul deposit (Berezovsky town) and granite from the Isetsky deposit (Iset site). The tendencies of changes in energy consumption during crushing of marble and granite have been determined. The resulting fractional composition was also analyzed after crushing the indicated rocks at various gaps between the jaws. Jaw crusher SCHD 10 M, sieve analyzer A 20 and laboratory balance MASSA-K VK-3000 were used as experimental equipment.

Key words: jaw crusher jaws energy intensity size gap crushing marble granite deposit host rock

Receiving date: 13.11.2021

Approval date: 03.12.2021

Publication date: 24.12.2021

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