Phosphate ore triple float
AssigneeTexasgulf Inc.
InventorGlenn H. Schrieber
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Abstract
A process for the improved beneficiation of phosphate ore in which the double float cationic (i.e., amine) floatation step is performed in two stages instead of the standard single stage, and which permits recovery of approximately two-thirds of the phosphate values that were previously lost in the amine tailings of the standard single stage process.
Claims5
An improved process for the beneficiation of phosphate ore wherein the ore is floated with anionic reagent to produce a single float product, the single float product is treated with acid to remove anionic reagent, and the acid treated single float product is subjected to cationic floatation with cationic reagent to produce a double float product, wherein the improvement comprises:
- (a) performing said cationic floatation in first and second stages;
- (b) adding cationic floatation reagent in starvation amounts in said first stage with a low floatation retention time to produce a float containing most of the silica from the ore which is discarded;
- and,
- (c) adding additional cationic floatation reagent to the phosphate ore remaining from said first stage to said second stage with enough floatation retention time to produce a float containing most of the phosphate from the total cationic floatation tailings which is recovered.
Dependencies are inferred from the claim text.