Method and apparatus for beneficiating phosphate ores

Details Method and apparatus for beneficiating phosphate ores Method and apparatus for beneficiating phosphate ores

1980-02-25

1982-04-13

Bashore, S. Leon

Chemistry: fertilizers

Processes and products

Inorganic material

71 44, 209 8, 209 11, 209214, 426807, 423305, C05B 1302

Patent

active

043245773

ABSTRACT:
Method and apparatus for producing high grade phosphate rock from low grades, slime or tailings by subjecting the low grade rock, slime or tailings to a calcination treatment at a temperature within the range from 1000.degree. F. to 1600.degree. F., and preferably from 1400.degree. F. to 1600.degree. F., until a fraction of said rock, slime or tailings becomes magnetically attractable, and subjecting the treated material to a high strength magnetic field to separate the same magnetically into at least two fractions, one of increased BPL and one of decreased BPL.

REFERENCES:
patent: 2528552 (1950-11-01), Royster
patent: 3032190 (1962-05-01), LeBaron
patent: 3225923 (1965-12-01), Lawyer
patent: 3684090 (1972-08-01), Kilbride
patent: 3901795 (1975-08-01), Smith et al.
patent: 4083929 (1978-04-01), Priestley

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