Back to results
US 4,287,053 AGranted
Beneficiation of high carbonate phosphate ores
AssigneeTennessee Valley Authority
InventorsJames R. Lehr, Shuang-shii Hsieh
Life of this patent
Estimating the term…
Abstract
A phosphate ore flotation process subjecting a phosphate ore containing carbonate mineral impurities to froth flotation in the presence of phosphate depressants, said depressants are alkyl phosphonic acids, and a carbonate collector, said collector is fatty acids, removing the separated carbonate minerals from the overflow, and recovering the phosphate value in the underflow. The process of the present invention can be performed either prior to or after the separation of siliceous matter from phosphate minerals by methods known in the art.
Claims6
An ore flotation process which comprises the steps of
- (1) subjecting a phosphate ore containing carbonate mineral impurities to froth flotation in the presence of a phosphate depressant, said depressant being selected from the group consisting of alkyl phosphonic acids, and a carbonate collector, said collector being a fatty acid;
- (2) removing the separated carbonate minerals from the overflow;
- and
- (3) recovering the phosphate values in the underflow.
1 more element
Dependencies are inferred from the claim text.