Evaluation of bench-scale pressure filtration when dewatering coal refuse slurry

M. S. Klima, G. S.S. Raman, J. Ganter, J. Smith, L. Hellgren, J. Pollack

Research output: Chapter in Book/Report/Conference proceedingConference contribution

8 Scopus citations

Abstract

Bench-scale pressure filtration testing was carried out to dewater coal refuse slurry. The test slurry was obtained from the thickener underflow stream of an operating coal preparation facility in Pennsylvania, which was processing bituminous coal. The slurry was being discharged into a slurry impoundment. Pressure filtration offers an option for dewatering the solids sufficiently to reduce or possibly eliminate the need for an impoundment. Moreover, filtration allows additional water to be recovered and reused in the cleaning facility, reducing the need for make-up water. Pressure filtration testing was carried out using approximately 90 mL slurry samples at pressures ranging from about 480 kPa to 900 kPa. Other test variables included slurry pH and temperature. Filtrate samples were collected as a function of time. For selected tests, the iron concentration of the filtrate was measured. The results indicated that filtration performance was affected by pressure and temperature. In addition, pH had a significant effect on filtration, with higher filtration rates and higher iron concentrations occurring at low pH values.

Original languageEnglish (US)
Title of host publication2nd Environmental Considerations in Energy Production Conference
EditorsJ. R. Crayon
PublisherSociety for Mining, Metallurgy and Exploration (SME)
Pages284-294
Number of pages11
ISBN (Electronic)9781510811744
StatePublished - Jan 1 2015
Event2nd Environmental Considerations in Energy Production Conference - Pittsburgh, United States
Duration: Sep 20 2015Sep 23 2015

Publication series

Name2nd Environmental Considerations in Energy Production Conference

Other

Other2nd Environmental Considerations in Energy Production Conference
CountryUnited States
CityPittsburgh
Period9/20/159/23/15

All Science Journal Classification (ASJC) codes

  • Energy Engineering and Power Technology
  • Renewable Energy, Sustainability and the Environment

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