Single float step phosphate ore beneficiation

Details Single float step phosphate ore beneficiation Single float step phosphate ore beneficiation

1985-03-28

1986-05-13

Nozick, Bernard

Classifying, separating, and assorting solids

Precedent preparation of items or materials to facilitate...

Selective differentiation

209166, B03D 102

Patent

active

045884986

ABSTRACT:
A flotation process is taught for beneficiating phosphate ores containing, as impurities, silica and alkaline earth metal carbonates, particularly dolomite. Using a single flotation stage, the phosphate values are recovered in the overflow and quite unexpectedly both the siliceous and the carbonate gangue minerals are simultaneously removed in the underflow. Prior to flotation, surfaces of the minerals in the phosphate ore are selectively sulfidized with an insoluble copper-containing metal sulfide, permitting use of sulfide mineral collecting reagents such as alkyl xanthates in the flotation step to achieve a high degree of selectivity.

REFERENCES:
patent: 1094760 (1914-04-01), Terry
patent: 3405802 (1968-10-01), Preller et al.
patent: 4514290 (1985-04-01), Swiatkowski et al.

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