Modeling of free and hindered settling conditions for fine coal beneficiation through a falcon concentrator

Feridun Boylu*

*Corresponding author for this work

Research output: Contribution to journalArticlepeer-review

20 Citations (Scopus)

Abstract

In this study, the free and hindered settling conditions for coal-shale-clay separation through a Falcon concentrator were determined experimentally using response surface methodology. The model parameters consisted of the separation efficiency and ash content of the concentrate and tailings. Based on the model with the highest response, free settling conditions dominated at centrifugal forces below 100 g and at solid concentrations of up to 30%-35%, especially for coarser particle sizes of 300 μm. These results revealed that, for effective fine coal beneficiation through a Falcon concentrator, the solid concentration should be maintained higher than 30%-35% (with a maximum of 45%-50%) to create hindered settling conditions because separation under these conditions is achieved based on specific gravity. The best results were obtained at a solid concentration of 50%. This finding was interesting because separations through enhanced gravity separators were achieved under conditions similar to separations performed in autogenous media.

Original languageEnglish
Pages (from-to)277-289
Number of pages13
JournalInternational Journal of Coal Preparation and Utilization
Volume33
Issue number6
DOIs
Publication statusPublished - 2 Nov 2013

Keywords

  • Falcon concentrator
  • Fine coal beneficiation
  • Free settling
  • Hindered settling
  • Modelling

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