Dual intensity magnetic separation process for beneficiation of platinum ore
AssigneeMobil Oil Corporation
InventorTheodore P. Goldstein
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Abstract
A method to isolate the paramagnetic fractions of a sediment to beneficiate the platinum and platinum group element ores therein comprising a differential magnetic filtration separation process.
Claims9
A process for recovering platinum and platinum group element ores from sediments comprising (1) screening the sediment until substantially all coarse material having a diameter larger than about 2 mm is removed;
- (2) magnetically separating and removing strongly magnetic minerals from the remaining sediment with a weak magnetic field having a force of from about 10 gauss to about 100 gauss;
- (3) removing the paramagnetic materials with a strong magnetic field having a force of from about 100 gauss to about 20 kilogauss;
- and (4) separating and recovering the platinum ores and/or platinum group element ores therefrom leaving a diamagnetic residue.
A method for isolating the paramagnetic fractions of a sediment selected from the group consisting essentially of marine, estuarine and riverine sedimentary deposits and beneficiating the platinum and platinum group element ores contained therein in a differential magnetic filtration separation process comprising (1) removing fractions of the sediment larger than about 2 mm by screening (2) separating and removing the ferromagnetic materials from the remaining sediment with a weak magnetic force of about 10 gauss to about 100 gauss followed by (3) isolation of the paramagnetic fraction by use of a stronger magnetic force having a strength of from about 100 gauss to about 20 kilogauss and recovering the platinum or platinum group element ores.
Dependencies are inferred from the claim text.