Classifying – separating – and assorting solids – Fluid suspension – Liquid
Patent
1985-10-07
1987-01-13
Nozick, Bernard
Classifying, separating, and assorting solids
Fluid suspension
Liquid
B01D 314
Patent
active
046363033
ABSTRACT:
A phosphate ore beneficiation process wherein phosphate ore containing coarse, weathered dolomite in the flotation feed thereof is subjected to beneficiation as follows: Said feed is sent to rougher phosphate flotation wherein it is treated with fatty acid and fuel oil and wherefrom is removed the coarse weathered dolomite in one or more cleaner phosphate flotations, without the use of additional flotation reagents added thereto, to thereby remove the coarse carbonate, i.e., dolomite fraction, which fraction would not otherwise float in subsequent carbonate flotation. In many instances this process effects reduction of the carbonate, as MgO contamination in the final concentrate, to less than about 1.0 percent by weight. Process feed can be prepared from the coarse pebble waste or the conventional flotation feed of the original phosphate matrix. After the acid-wash step there oftentimes is so little residual silica remaining to be removed from the resulting phosphate concentrate that the use of an amine circuit is not necessary. Rather, said resulting concentrate is directly subjected to carbonate flotation using alkyl diphosphonic acid as depressant and fatty acids as collector, with the phosphate values being recovered in the underflow therefrom.
REFERENCES:
patent: 2105807 (1938-01-01), Crago
patent: 3462016 (1969-08-01), Bushell et al.
patent: 4287053 (1981-09-01), Lehr et al.
patent: 4301003 (1981-11-01), Hsieh
patent: 4324653 (1982-04-01), Henchiri et al.
patent: 4436616 (1984-03-01), Dufour et al.
patent: 4440636 (1984-04-01), Lilley
patent: 4486301 (1984-12-01), Hsieh et al.
Nozick Bernard
Petrusek Robert A.
Tennessee Valley Authority
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