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Apparatus and process for the separation of hydrophobic and hydrophilic particles using microbubble column flotation together with a process and apparatus for generation of microbubbles

United States Patent

*** EXPIRED ***
September 29, 1998
View the Complete Patent at the US Patent & Trademark Office
A method and apparatus are disclosed for the microbubble flotation separation of very fine and coarse particles, especially coal and minerals, so as to produce high purity and high recovery efficiency. This is accomplished through the use of a flotation column, microbubbles, recycling of the flotation pulp, and countercurrent wash water to gently wash the froth. Also disclosed are unique processes and apparatus for generating microbubbles for flotation in a highly efficient and inexpensive manner using either a porous tube or in-line static generators.
Yoon; Roe-Hoan (Blacksburg, VA), Adel; Gregory T. (Blacksburg, VA), Luttrell; Gerald H. (Blacksburg, VA)
Virginia Tech Intellectual Properties, Inc. (Blacksburg, VA)
08/ 641,778
April 30, 1996
This invention was made in part with Government support under Contract Number DE-FG22-83PC 60806 awarded by the Department of Energy. The Government has certain rights in the invention.