Title page for ETD etd-10272008-172159

Type of Document Master's Thesis
Author Kennedy, Dennis Lee
Author's Email Address dknnd@vt.edu
URN etd-10272008-172159
Title Redesign of Industrial Column Flotation Circuits Based on a Simple Residence Time Distribution Model
Degree Master of Science
Department Mining and Minerals Engineering
Advisory Committee
Advisor Name Title
Luttrell, Gerald H. Committee Chair
Adel, Gregory T. Committee Member
Yoon, Roe-Hoan Committee Member
  • Residence Time Distribution
  • Coal Flotation
  • Column Flotation
Date of Defense 2008-10-14
Availability unrestricted
The potential for improved selectivity has made column flotation cells a popular choice for upgrading fine coal. Unfortunately, recent production data from full-scale column plants indicate that many industrial installations have failed to meet original expectations in terms of clean coal recovery. Theoretical studies performed using a simple dispersion model showed that this inherent shortcoming could be largely minimized by reconfiguring the columns to operate in series as a cell-to-cell circuit. Follow-up field data showed that this low-cost modification increased flotation recovery as predicted by the dispersion model. This study presents the key findings obtained from the field investigation and provides generic guidelines for designing multi-stage column circuits.
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