Method of removing unburned carbon from coal ash

Details Method of removing unburned carbon from coal ash Method of removing unburned carbon from coal ash

2006-12-11

2011-11-08

Matthews, Terrell (Department: 3653)

Classifying, separating, and assorting solids

Plural, diverse separating operations

C209S002000, C209S010000, C209S019000

Reexamination Certificate

active

08051985

ABSTRACT:
A method comprising; a step in which unburned carbon contained in coal ash is mechanically separated with a classifier; a step in which the coal ash from which part of the unburned carbon has been removed with the classifier is pulverized or disaggregated with a pulverizer; a step in which water is added to the coal ash pulverized or disaggregated with the pulverizer to obtain a slurry; a step in which a scavenger is added to the slurried coal ash; a step in which a shear force is applied to the slurry containing the scavenger to cause the scavenger to selectively adhere to the unburned carbon contained in the coal ash; a step in which a foaming agent is added to the slurry in which the scavenger has adhered to the unburned carbon; and a step in which the unburned carbon is floated on the slurry containing the foaming agent together with bubbles and is separated.

REFERENCES:
patent: 4424065 (1984-01-01), Langhoff et al.
patent: 4426282 (1984-01-01), Aunsholt
patent: 4474619 (1984-10-01), Meyer et al.
patent: 4526680 (1985-07-01), Owen
patent: 4532032 (1985-07-01), Ng et al.
patent: 4593859 (1986-06-01), Nakaoji et al.
patent: 4676804 (1987-06-01), Miller et al.
patent: 4712742 (1987-12-01), Ogawa et al.
patent: 4737272 (1988-04-01), Szatkowski et al.
patent: 4925559 (1990-05-01), Biermann et al.
patent: 5022983 (1991-06-01), Myers et al.
patent: 5379902 (1995-01-01), Wen et al.
patent: 6793079 (2004-09-01), Khan et al.
patent: 7163105 (2007-01-01), Jameson et al.
patent: 7328806 (2008-02-01), Khan et al.
patent: 2003/0106843 (2003-06-01), Jameson et al.
patent: 2004/0099575 (2004-05-01), Khan et al.
patent: 2004/0256294 (2004-12-01), Khan et al.
patent: 2005/0051465 (2005-03-01), Khan et al.
patent: 2005/0121370 (2005-06-01), Jameson et al.
patent: 2007/0199486 (2007-08-01), Saito et al.
patent: 3613347 (2005-01-01), None

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