US Patent Number
5456363
Publication Date
10-10-1995
Abstract
An improved froth flotation method is provided for the removal and recovery of an ultra-fine constituent such as carbon from tailings such as fly ash. A flotation apparatus is utilized that preferably includes a slurry conditioning tank and a flotation cell. The method of the present invention comprises the improvement of utilizing a flotation reagent formulation comprising a mixture of fuel oil and petroleum sulfonate. The method broadly includes the steps of (1) producing a slurry, or solid suspension, of the material containing the constituent to be recovered by adding a preselected amount of water or other slurrying liquid; (2) adding the flotation reagent comprising a mixture of fuel oil and petroleum sulfonate to the slurry that renders the selected constituent hydrophobic; (3) aerating the conditioned slurry; (4) recovering the selected ultra-fine constituent from an upper portion of the flotation apparatus; and (5) withdrawing and recovering tailings from a lower portion of the flotation apparatus.
Assignees
University of Kentucky Research Foundation, Lexington, Ky.
Application Number
383,629
Filing Date
02/06/1995
Recommended Citation
Groppo, John and Brooks, Steven M., "Method of Removing Carbon from Fly Ash" (1995). Center for Applied Energy Research Faculty Patents. 28.
https://uknowledge.uky.edu/caer_patents/28
