New spiral technologies

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

Abstract

Spiral concentrators are widely used for the beneficiation of fine coal in the nominally -1.0+0.15 mm size fraction and offer a number of advantages for fine coal beneficiation including low operating and capital costs, operational simplicity, excellent tolerance to variation in feed conditions, low maintenance, and high reliability. Spirals typically separate effectively at cut points between 1.70 and 1.80 specific gravity. Under more carefully controlled conditions of feed rate and percent solids, cut points around 1.60 can be achieved. The most noted limitation of current spiral models is the inability to achieve cut points below these levels to compete with other water-based technologies, such as teeter-bed separators, reflux classifiers, and water-only cyclones. Spiral manufacturers have continued to improve spiral technology to meet this challenge. Building on successful developments of a two-stage circuit in one spiral assembly, manufacturers have introduced new low specific gravity cut point spirals. Test work has been completed, and these spirals are now finding application in the coal industry.

Original languageEnglish (US)
Title of host publicationChallenges and Opportunities in Coal Preparation - Proceedings from a 2019 Conference Highlighting Current Practice and Future Requirements for Coal Preparation Engineers
EditorsMark S. Klima, Barbara J. Arnold, Peter J. Bethell
PublisherSociety for Mining, Metallurgy and Exploration
Pages73-84
Number of pages12
ISBN (Electronic)9780873354776
StatePublished - 2019
Event2019 Conference Highlighting Current Practice and Future Requirements for Coal Preparation Engineers: Challenges and Opportunities in Coal Preparation - Southpointe, United States
Duration: Oct 23 2019 → …

Publication series

NameChallenges and Opportunities in Coal Preparation - Proceedings from a 2019 Conference Highlighting Current Practice and Future Requirements for Coal Preparation Engineers

Conference

Conference2019 Conference Highlighting Current Practice and Future Requirements for Coal Preparation Engineers: Challenges and Opportunities in Coal Preparation
CountryUnited States
CitySouthpointe
Period10/23/19 → …

All Science Journal Classification (ASJC) codes

  • Chemical Engineering(all)
  • Geotechnical Engineering and Engineering Geology
  • Energy Engineering and Power Technology
  • Fuel Technology
  • Mechanical Engineering

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