Title: Process for recovering magnetite from fly ash

Abstract: This invention relates to a process for recovering magnetite from fly ash. Fly ash containing magnetite is made into a slurry having 5% to 10% solids by weight and the slurry is then concentrated in a settling tank to a slurry having approximately 20% solids by weight. The concentrated slurry is delivered to a magnetic separator where the magnetite is separated from the remainder of the fly ash. The magnetite is then crushed in a pulverizer to a size so that 95% of the crushed magnetite will pass through a 325 mesh sieve. The crushed magnetite is then delivered to a second magnetite separator which is weaker than the first magnetic separator to separate the crushed magnetite from any impurities. The purified crushed magnetite is then dried and stored.

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Inventors: Brown, Jim W. (Carterville, IL, US)

Application Number: 967969
Filing Date: 1978-12-11
Publication_date: 1980-03-04
Assignee:
Primary Class(es): 241/21 209/39, 209/214, 241/24.14, 241/77
Other Classes:
US Patent Ref:

1512870	Oct, 1924	Ullrich et al.	241/77.
3769054	Oct, 1973	Pennachetti et al.	106/288.

Other Refs:
Primary Examiner: Hill, Ralph J.
Assistant Examiner:
Attorney: