Polulyakh D.A. Determination of parameters for coal hydromechanical screening through the combined sifting surface of rectangular form

Details

Parent Category: Geo-Technical Mechanics, 2016

Category: Geo-Technical Mechanics, 2016, Issue 131

 

Geoteh. meh. 2016, 131, 90-99

 DETERMINATION OF PARAMETERS FOR COAL HYDROMECHANICAL SCREENING THROUGH THE COMBINED SIFTING SURFACE OF RECTANGULAR FORM

¹Polulyakh D.A.

¹SHEI «NMU»

UDC 622.74:621.928.028

Abstract. The coal hydromechanical screening technology is developed< which is based oncombined sifting surface of rectangular form used for coarse-size machine-class coal preparationbefore its dense-medium separation. The combined sifting surface consists of stationary, connecting and mobile sectors. Screening in stationary sector is under the action of hydrodynamic force, and in mobile sector – under the action of oscillation force. It is determined that technological, structural, hydrodynamic and mechanical parameters impacts on efficiency of the machine-class coal preparation. Such combination of screening and dehydration operations in one aggregate has helped solving the complex scientific and technical problem, especially for the equipment with 1000 t/h productivity: the screen choking by oversized product is 4,6 % (including 0,5 % by the class 0-1 mm); humidity is 7,8 %; screening efficiency is 90,2 %; relative efficiency of dehydration is 84,2 %; and efficiency of machine-class coal preparation is 75,9 %.
Keywords: coal, hydromechanical screening, efficiency, coal of machine-classes, vibrocompaction.

REFERENCES

1. Polulyakh, O.V. (2011), «Ground of machine classes largeness ranges at coal enriching», Ph.D. Thesis, special 05.15.08, SHEI «National mining university», Dnepropetrovsk, UA.
2. Shevchenko, G.A. (2011), «Development of scientific bases of oscillation moving processes the and division of mineral raw material in a liquid on a hesitating surface», D. Sc. Thesis, special. 05.05.06, IGTM NAS of Ukraine, Dnepropetrovsk, UA.
3. Keles, S., Egtes, T. and Bethell, P. (2010), «Development of the Centribaric Dewatering Technology», Proceedings XVI international Coal Preparation Congress, Littleton (USA): SME.
4. Polulyakh, A.D. (1999), «Enriching of ordinary coal five machine classes», Coal of Ukraine, no. 5, pp. 49-50.
5. Kirnarskiy, A.S. (2012), «Principle of one-functional dividing processes at enriching of anthracite coal», Coal, no. 5, pp. 92-94.
6. Polulyakh, A.D., Pilov, P.I. and Yegurnov, A.Ye. (2007), Praktikum po raschetam kachestvennokolichestvennykh i vodno-shlamovykh skhem ugleobogatitelnykh fabric [Practical Work on the calculations of high-quality-quantitative and water-slime charts of coal preparation factories], National mining university, Dnepropetrovsk, UA.
7. Polulyakh, A.D. (2010), Gidrogrokhocheniye ugley [Hydro-screening of coals], PP Shevelev E.A, Dnepropetrovsk, UA.

About the author:

Polulyakh Danil Aleksandrovich, Candidate of Technical Sciences (Ph.D) Associate Professor, Associate Professor of Department of Mineral Preparation, State Higher Educational Institution «National mining university» (SHEI «NMU»), Dnepr, Urraine, This email address is being protected from spambots. You need JavaScript enabled to view it. .

• < Prev
• Next >