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Abstract

A froth flotation method is provided for removing carbon from fly ash which utilizes an environmental friendly conditioning agent. The conditioning agent preferably comprises a biodegradable oil which is added to a slurry containing raw fly ash and water. The conditioning agent renders the carbon in the fly ash hydrophobic such that upon aeration of the slurry, air bubbles attach to the carbon particles and carry' them to the surface of the slurry in the form of a froth, such that the carbon may be removed.

Patent Number

6,068,131

Assignee

The Board of Control of Michigan Technological University, Houghton, Mich.

Application Number

09/352,594

Date Filed

7-13-1999

Certificate of Correction

Yes

Issue Date

5-30-2000

Disciplines

Engineering | Mechanical Engineering

Method of removing carbon from fly ash

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