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Archives of Mining Sciences

The Journal of Committee of Mining of Polish Academy of Sciences

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Advanced studies on coal injection into a cavitation cell for the purpose of comminution / Badania procesu wtłaczania węgla do komór kawitacyjnych w celu rozdrabniania

Greg Galecki / Gul Akar
  • DEPARTMENT OF MINING ENGINEERING, DOKUZ EYLUL UNIVERSITY, IZMIR, TURKEY, Post-Doctoral Fellow, DEPARTMENT OF MINING AND NUCLEAR ENGINEERING, MISSOURI S&T, ROLLA, MO, USA
  • Other articles by this author:
  • De Gruyter OnlineGoogle Scholar
/ Sezai Sen
  • DEPARTMENT OF MINING ENGINEERING, DOKUZ EYLUL UNIVERSITY, IZMIR, TURKEY, Post-Doctoral Fellow, DEPARTMENT OF MINING AND NUCLEAR ENGINEERING, MISSOURI S&T, ROLLA, MO, USA
  • Other articles by this author:
  • De Gruyter OnlineGoogle Scholar
/ Yaqing Li
Published Online: 2012-11-22 | DOI: https://doi.org/10.2478/v10267-012-0049-7

Abstract

In this study, the effect of coal comminution with waterjets enhanced by cavitation was investigated. The experiments were carried out using mono-size coal feeds in a batch closed circuit, in a specially designed cell to induce cavitation at 69 MPa inlet pressure and back pressures of zero and 0.345 MPa. Test results were evaluated on the product calculated surface area and the Rosin-Rammler parameters. The experiments showed that the maximum particle size reduction was achieved during the first run through the comminution circuit operated without back pressure. However, a decreasing tendency in comminution efficiency was noted with the number of runs through the system. The use of 0.345 MPa back pressure resulted in a wider size distribution of the product.

W pracy przedstawiono badanie procesu rozdrabniania węgla przy pomocy dysz wodnych, wspomaganego przez kawitację. Eksperymenty prowadzono na partiach brył węgla o jednakowych rozmiarach, w układzie zamkniętym, w specjalnej komorze kawitacyjnej przystosowanej do działania przy ciśnieniu wlotowym 69 MPa i przy przeciwciśnieniu zero i 0.345 MPa. Wyniki eksperymentu określono na podstawie obliczeń pól powierzchni, przy wykorzystaniu parametrów Rosina-Rammlera. Eksperymenty wykazały, że maksymalną redukcję rozmiarów ziaren węglowych uzyskuje się w trakcie pierwszej próby dokonanej w komorze bez zastosowania przeciwciśnienia. Z każdym kolejnym przebiegiem obserwowano malejącą skuteczność rozdrabniania. Zastosowanie przeciwciśnienia rzędu 0.345 MPa spowodowało większy rozrzut wymiarów ziaren w produkcie końcowym.

Keywords : waterjet; coal; comminution; Rosin-Rammler plots

Słowa kluczowe : struga wody; węgiel; rozdrabnianie; wykresy Rosina-Rammlera

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About the article

Published Online: 2012-11-22

Published in Print: 2012-12-01


Citation Information: Archives of Mining Sciences, Volume 57, Issue 3, Pages 769–778, ISSN (Print) 0860-7001, DOI: https://doi.org/10.2478/v10267-012-0049-7.

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