Recovery and utilization of bottom ash magnetics for coal cleaning medium

Research output: Chapter in Book/Report/Conference proceedingConference contributionpeer-review

1 Scopus citations

Abstract

Dense medium processes are used to clean over 50% of the coal that is fed into preparation plant facilities worldwide. The dense medium is formed using ultrafine magnetite which is recovered after the cleaning step using drain-and-rinse screens and magnetic separators. Despite the high efficiency of the recovery system, magnetite losses of around 0.5 to 1.0 kg/ton are common. Considering the recent escalation of magnetite to around $300/ton, an alternative source of magnetic material from coal combustion bottom ash has been investigated. A relatively low cost recovery system has been developed. Dense-medium tests using the bottom ash magnetics revealed a high level of efficiency as indicated by probable error values around 0.03 over the range of medium densities investigated. The results from both the recovery and coal cleaning efforts will be discussed in detail.

Original languageEnglish
Title of host publicationSME Annual Meeting and Exhibit and CMA's 111th National Western Mining Conference 2009
Pages6-11
Number of pages6
StatePublished - 2009
EventSME Annual Meeting and Exhibit and CMA's 111th National Western Mining Conference 2009 - Denver, CO, United States
Duration: Feb 22 2009Feb 25 2009

Publication series

NameSME Annual Meeting and Exhibit and CMA's 111th National Western Mining Conference 2009
Volume1

Conference

ConferenceSME Annual Meeting and Exhibit and CMA's 111th National Western Mining Conference 2009
Country/TerritoryUnited States
CityDenver, CO
Period2/22/092/25/09

ASJC Scopus subject areas

  • Geochemistry and Petrology
  • Geophysics
  • Geotechnical Engineering and Engineering Geology

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