Phosphate ore flotation
AssigneeMobil Oil Corporation
InventorsFrank B. Eisenhardt, Stanislaus F. Muehlberger
Life of this patent
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Abstract
The washing step that usually follows the deoiling of phosphate rougher concentrate is eliminated by adding lime to said rougher concentrate following the deoiling.
Claims3
An improved process for the recovery of phosphate rock from an aqueous suspension of solids, the process comprising at least two flotation steps employing the appropriate reagent system, one of which is fatty acid flotation and the other an amine flotation, the improvement whereby the rougher concentrate from the fatty acid flotation is deoiled with a strong mineral acid, treated with lime to neutralize the strong acid, reagentized with an amine and refloated to recover the phosphate values present without washing following deoiling and addition of said lime.
Dependencies are inferred from the claim text.