Title page for ETD etd-06012007-114612


Type of Document Master's Thesis
Author Salomon, Jeffrey A
Author's Email Address jsalomon@vt.edu
URN etd-06012007-114612
Title Design and Testing of a Hyperbaric Horizontal Belt Filter for Fine Coal Dewatering
Degree Master of Science
Department Mining and Minerals Engineering
Advisory Committee
Advisor Name Title
Luttrell, Gerald H. Committee Chair
Adel, Gregory T. Committee Member
Novak, Thomas Committee Member
Yoon, Roe-Hoan Committee Member
Keywords
  • Coal Preparation
  • Belt Filter
  • Pressure filter
  • filtration
  • Dewatering
Date of Defense 2007-06-01
Availability unrestricted
Abstract
This objective of this project was to develop a new dewatering device that could produce a lower moisture content and better fine particle recovery than current technology. To meet this goal, a hyperbaric horizontal belt filter was designed and constructed over the course of 18 months. Once built, the filter was then thoroughly tested to determine operational capabilities. The test data showed that the lowest moisture content that could be achieved with a coarse feed (minus 1 mm screen-bowl centrifuge feed) was 8.8%. This value could be further reduced to 8.2% and capacity increased with the use of dewatering aids. When testing with a fine feed (minus 0.15 mm column product feed), the lowest moisture content was 35% without chemicals and 29% with chemicals. A 50/50 mixture by volume of coarse and fine feeds was artificially created and provided a moisture of 10.8%, which was reduced using reagents to 8.4%. The machine provided a very high recovery rate for all feed materials. Of the coal input, no less than 94% of it reported to the dry product. The pressure used to dewater the coal was the controlling factor for the air consumption of the unit. The data from these tests suggest that a full size production unit is feasible, although the power requirements for gas compression would be high.

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