Analysis of one-stage and two-stage crushing of shale in jaw crusher ShchD 10M for manufacture of terrazzo tiles

The article presents the experimental research data on oneand two-stage crushing of shale from the Rezh open pit mine in the Ural Region in jaw crusher ShchD 10M with a complex-moving jaw. Shale is a metamorphic rock of low rank, composed mainly of dark-color minerals and quartz or dark-color minerals and feldspar (except for amphiboles). Crushed shale is widely used in construction for coating of building sides, in production of roofing and in manufacture of tiles. For this reason, it is important for the theory and practice to determine rational parameters of shale crushing. The implemented studies into shale crushing show that as against the one-stage process, the two-stage crushing yields much more fines and reduces the yield of coarse (uncrushed) particles. The one-stage crushing offers acceptable coarseness of particles, as well as simplifies the process and allows less number of crushers to be involved. The productivity and time of crushing, as well as weight of shale samples are determined. Using testing screen A 20, size distribution of crushed shale was carried out, and the bar charts of the size distribution were constructed. Advantages and disadvantages of one-and two-stage crushing in a jaw crusher are described.

Keywords: jaw crusher, shale, crushing, testing screen, coarseness, productivity, fraction, rock.
For citation:

Bochkov V. S., Dyagilev S. D. Analysis of one-stage and two-stage crushing of shale in jaw crusher ShchD 10M for manufacture of terrazzo tiles. MIAB. Mining Inf. Anal. Bull. 2020;(7):78-84. [In Russ]. DOI: 10.25018/0236-1493-2020-7-0-78-84.

Acknowledgements:
Issue number: 7
Year: 2020
Page number: 78-84
ISBN: 0236-1493
UDK: 622.732
DOI: 10.25018/0236-1493-2020-7-0-78-84
Article receipt date: 12.02.2020
Date of review receipt: 05.03.2020
Date of the editorial board′s decision on the article′s publishing: 20.06.2020
About authors:

V.S. Bochkov1, Cand. Sci. (Eng.), Assistant Professor, e-mail: bochkof@list.ru,
S.D. Dyagilev1, Student,
1 Ural State Mining University, 620144, Ekaterinburg, Russia.

 

For contacts:

V.S. Bochkov, e-mail: bochkof@list.ru.

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