Process for recovering magnetite from fly ash

Details Process for recovering magnetite from fly ash Process for recovering magnetite from fly ash

1978-12-11

1980-03-04

Hill, Ralph J.

Solid material comminution or disintegration

Processes

With application of fluid or lubricant material

241 24, 241 77, 209214, 209 39, B02C 2314

Patent

active

041913361

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.

REFERENCES:
patent: 1512870 (1924-10-01), Ullrich et al.
patent: 3769054 (1973-10-01), Pennachetti et al.

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