Classifying – separating – and assorting solids – Fluid suspension – Liquid
Patent
1978-12-04
1980-10-21
Halper, Robert
Classifying, separating, and assorting solids
Fluid suspension
Liquid
B03D 104
Patent
active
042292875
ABSTRACT:
Tin values in the form of cassiterite (SnO.sub.2) are recovered from aqueous pulps of finely divided cassiterite-bearing ore, preconcentrate or concentrate by froth flotation. The ore pulps are deslimed thoroughly, partially or not at all. Slimes, gangue or waste minerals in the pulps are selectively depressed by use of a metal salt/silicate reagent combination. The cassiterite is floated at a mildly acidic to neutral pH, generally in the range of about 5 to 6, by one and/or more highly selective tin collectors such as sulfosuccinamates, aspartates, phosphonates, etc., at environmental or, preferably, elevated pulp temperature. Flotation machine impeller speeds are within conventional range or higher, preferably the latter. The cleaning of the thus-produced cassiterite rougher flotation concentrate is performed after an additional (secondary) conditioning step whereby an additional depressant, such as tannic acid, sulfuric acid, sodium fluosilicate, sodium lignin sulfonate or activated charcoal is used.
REFERENCES:
patent: 1492904 (1924-05-01), Solmon
patent: 1972588 (1934-09-01), Hansen
patent: 2120485 (1938-06-01), Clemmer
patent: 2202601 (1940-05-01), Ried
patent: 2557455 (1951-06-01), Moyer
patent: 2607479 (1952-08-01), Bates
patent: 2741364 (1956-05-01), Wilson
patent: 3314537 (1967-04-01), Greene
patent: 3337048 (1967-08-01), Mercade
patent: 3469693 (1969-09-01), Arbiter
patent: 3482013 (1969-08-01), Mercade
patent: 3635337 (1972-01-01), Mercade
patent: 3830366 (1974-08-01), Day
patent: 3915391 (1975-10-01), Mercade
patent: 3929629 (1975-12-01), Griffith
Chem. Abst., 73, 1970, 101144n.
Chem. Abst., 82, 1975, 33609b.
Chem. Abst., 75, 1971, 39080z.
Engelhard Minerals & Chemicals Corporation
Halper Robert
Moselle Inez L.
LandOfFree
Tin flotation does not yet have a rating. At this time, there are no reviews or comments for this patent.
If you have personal experience with Tin flotation, we encourage you to share that experience with our LandOfFree.com community. Your opinion is very important and Tin flotation will most certainly appreciate the feedback.
Profile ID: LFUS-PAI-O-2021790