Recovery of minerals from ultra-basic rocks

Details Recovery of minerals from ultra-basic rocks Recovery of minerals from ultra-basic rocks

1978-12-06

1981-03-17

Hill, Ralph J.

Solid material comminution or disintegration

Processes

With classifying or separating of material

209 12, 209 38, 209 39, 209214, B07B 1500

Patent

active

042562678

ABSTRACT:
A process for the metallurgical treatment of pyroxenite-type ore, which comprises comminuting the ore to a particle size range of between about 40 and 600 micron, or alternatively between about 40 to 1000 micron, and thereafter subjecting the comminuted ore to dry HIMS to recover a non-attracted apatite concentrate from weakly attracted silicate minerals contained in the pyroxenite ore. Another aspect of the invention relates to the recovery of phlogopite and/or vermiculite from more weakly attracted diopside and non-attracted apatite by dry HIMS. A further aspect of the invention relates to particle size fractionation by pneumatic classification followed by dry HIMS, electrostatic separation and dry HIMS, and electrostatic separation alone, applied respectively to fine, medium, and coarse particle size fractions respectively to recover apatite from silicate minerals contained in pyroxenite ore.

REFERENCES:
patent: 3022890 (1962-02-01), Snow
patent: 3022956 (1962-02-01), Haseman
patent: 3032189 (1962-05-01), Adam et al.
patent: 3032190 (1962-05-01), Le Baron
patent: 3326474 (1967-06-01), Clary et al.

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