Classifying – separating – and assorting solids – Fluid suspension – Liquid
Patent
1991-12-30
1993-06-22
Lithgow, Thomas M.
Classifying, separating, and assorting solids
Fluid suspension
Liquid
209167, B03D 1008, B03D 102
Patent
active
052214664
ABSTRACT:
This invention provides an improved method for the rougher flotation of phosphate ore using sodium carbonate to control the pH at about 9.6-10.5. The method facilitates improved recovery of phosphate from its ore; in addition the Bone Phosphate of Lime (BPL) of the phosphate concentrate increases, which provides further advantages in that subsequent steps are improved by virtue of receiving a feed of greater purity. There are also certain environmental advantages obtained when ammonia is replaced with sodium carbonate and the operational safety of the flotation system is enhanced when ammonia is replaced with sodium carbonate.
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Garcia Steven C.
Staniek Charles T.
Freeport-McMoRan Resource Partners, Limited Partnership
Lithgow Thomas M.
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