Method for improving the pozzolanic character of fly ash

Details Method for improving the pozzolanic character of fly ash Method for improving the pozzolanic character of fly ash

1997-08-29

1998-10-06

Lithgow, Thomas M.

Classifying, separating, and assorting solids

Fluid suspension

Liquid

209 121, 209 13, 209 17, 209459, 106405, 106DIG1, 106705, B03B 904, B03B 700

Patent

active

058172300

ABSTRACT:
A method for improving the pozzolanic character of fly ash includes the steps of first hydraulically classifying and then flotation separating the fly ash in order to reduce particle size distribution and remove carbon. The method also includes the steps of spiral concentrating separated coarse particles to recover iron, pyrite and marcasite and screening the fly ash to remove ultra-light carbon and plant debris.

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