Method of making mineral filler and pozzolan product from fly ash
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United States of America Patent
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Jun 5, 2001
Issued Date -
N/A
app pub date -
Jul 19, 1999
filing date -
Feb 17, 1999
priority date (Note) -
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Abstract
A method for producing a mineral filler and pozzolan product 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 and a coarse fraction having an average particle size of from about 6 to 20 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 to form a mineral filler. The coarse fraction is preferably passed through a 100 mesh screen to form a pozzolan product.
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