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US 4,282,087 AGranted
Selective flocculation for iron values
AssigneeAmerican Cyanamid Company
InventorsRichard M. Goodman, Hans P. Panzer
Life of this patent
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Abstract
An iron ore is finely ground and slurried prior to being subjected to treatment with a selective flocculant for iron values. Subsequent to treatment, the iron values are allowed to settle into the underflow concentrate and be recovered. The selective flocculant employed is a hydroxymethylated polyacrylamide having a high molecular weight and a degree of hydroxymethylation in excess of about 50%.
Claims2
A process for recovering iron values from a mixture of hematitic ore and its gangue material which comprises:
- (a) slurrying a finely ground hematitic ore in water;
- (b) treating said slurry with an effective amount of a hydroxymethylated polyacrylamide wherein the hydroxymethylated polyacrylamide has a molecular weight in excess of six million and has a degree of hydroxymethylation in excess of about 90%.
- (c) settling the iron values as an underflow concentrate;
- and
- (d) recovering the iron concentrate.
2 more elements
Dependencies are inferred from the claim text.