Method of making a mineral filler from fly ash
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United States of America Patent
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Oct 31, 2000
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N/A
app pub date -
Feb 17, 1999
filing date -
Feb 17, 1999
priority date (Note) -
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Abstract
A method for producing a mineral filler from fly ash is provided in which fly ash is dry processed in an air classifier to obtain a fine fraction having an average particle size of from about 0.1 to 5 microns. The fine fraction is then preferably passed through a magnetic separator to remove ferrous iron oxides and may optionally be treated with a surface modifier. The resulting processed fly ash may be used in a wide variety of filler applications.
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