High purity iron oxide and method for production hereof

Details High purity iron oxide and method for production hereof High purity iron oxide and method for production hereof

1993-04-16

1994-05-31

Brunsman, David

Chemistry of inorganic compounds

Treating mixture to obtain metal containing compound

Iron group metal

423138, 423148, 423632, 423633, 423634, C01G 4902

Patent

active

053167465

ABSTRACT:
A method for producing high-purity iron oxide which comprises pulverizing iron ore into powder having an average particle diameter of 20-150 .mu.m, removing fine particles from the powder, and subjecting the powder to wet magnetic separation in a magnetic field of 1000-15000 gauss for the removal of impurities. The iron oxide powder may undergo the secondary steps of pulverization and classification, which are performed by the combination of a wet grinding means and a wet cyclone, and drying and calcination.

REFERENCES:
patent: 3007775 (1961-11-01), Llewelyn
patent: 3672579 (1972-06-01), Lawver
patent: 4133677 (1979-01-01), Matsui et al.
patent: 4309459 (1982-01-01), Takuoka
patent: 4319988 (1982-03-01), Aldrich
patent: 4378252 (1983-03-01), Kiemle et al.
patent: 5032367 (1991-07-01), Hirai et al.

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