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Cross flow cyclonic flotation column for coal and minerals beneficiation

United States Patent

May 2, 2000
View the Complete Patent at the US Patent & Trademark Office
U.S. Department of Energy - Visit the Office of the Assistant General Counsel for Technology Transfer & Intellectual Property Website
An apparatus and process for the separation of coal from pyritic impurities using a modified froth flotation system. The froth flotation column incorporates a helical track about the inner wall of the column in a region intermediate between the top and base of the column. A standard impeller located about the central axis of the column is used to generate a centrifugal force thereby increasing the separation efficiency of coal from the pyritic particles and hydrophillic tailings.
Lai; Ralph W. (Upper St. Clair, PA), Patton; Robert A. (Pittsburgh, PA)
U. S. Department of Energy (Washington, DC)
08/ 889,588
July 8, 1997
STATEMENT REGARDING FEDERALLY SPONSORED RESEARCH OR DEVELOPMENT The United States Government has rights in this invention pursuant to the employer-employee relationship of the U.S. Department of Energy and the inventor.