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US 12,325,030 B2Granted
Method for the beneficiation of iron ore streams
AssigneeFortescue Metals Group Ltd
InventorsStephen Stretch, Bohdan Ilich
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Abstract
A method of beneficiating iron ore streams, the method comprising the steps of sizing an iron ore stream to provide a fines fraction of less than 3.0 mm diameter particle size and contacting the fines fraction with a magnetic field and magnetically separating the fines fraction into a concentrate stream and a tailings stream.
Claims21
A method of beneficiating iron ore streams, the method comprising the steps of:
- sizing an iron ore stream to provide a wet fines fraction of less than 3.0 mm diameter particle size;
- contacting the wet fines fraction of less than 3.0 diameter particle size with a magnetic field directly, so that the fines fraction is magnetically separated into a concentrate stream and a tailings stream;
- and
- contacting the tailings stream with a second magnetic field and magnetically separating the tailings stream into a second concentrate stream and a second tailings stream;
- wherein the iron ore stream is a comminuted iron ore stream comprising about 40-66 w/w % iron and the concentrate stream has an iron concentration of at least 55 w/w % iron, wherein the tailings stream is an untreated tailings stream, and the second magnetic field is of higher intensity than the magnetic field.
2 more elements
Dependencies are inferred from the claim text.