Classifying – separating – and assorting solids – Fluid suspension – Liquid
Patent
1990-06-15
1992-03-10
Silverman, Stanley S.
Classifying, separating, and assorting solids
Fluid suspension
Liquid
252 61, B03D 1012, B03D 1014, B03D 102
Patent
active
050947460
ABSTRACT:
The present invention relates to improved process for beneficiating an ore-containing sulfide material. In particular, the process is useful for beneficiating ores and recovering metals such as gold, copper, lead, molybdenum, zinc, etc., from the ores. In one embodiment, the process comprises the steps of:
(1) forming a slurry comprising at least one crushed mineral-containing ore, water and a collector which is a mixture of (A) at least one metal salt of a phosphorus acid represented by the Formula: ##STR1## wherein each R.sub.1 is independently a hydrocarbyl, hydrocarbyloxy or hydrocarbylthio group having from 1 to about 18 carbon atoms, each X is independently oxygen or sulfur, and the lowest oxidation state of the metal is plus two, and (B) at least one thio compound comprising (i) at least one dithiocarbamate represented by the formula: ##STR2## wherein each R.sub.2 is independently hydrogen, a hydrocarbyl group having from 1 to about 18 carbon atoms, or R.sub.2 taken together with R.sub.3 and the nitrogen atom form a five, six or seven member heterocyclic group; each R.sub.3 is independently a hydrocarbyl group having from 1 to about 18 carbon atoms, or R.sub.3 taken together with R.sub.2 and the nitrogen atom form a five, six or seven member heterocyclic group; and R.sub.4 is a hydrocarbylene group having from 1 to about 10 carbon atoms, (ii) at least one thionocarbamate represented by the Formula ##STR3## wherein R.sub.5 and R.sub.6 are hydrocarbyl groups having from 1 to about 18 carbon atoms or mixtures of (i) and (ii);
(2) subjecting the slurry from step (1) to froth flotation to produce a froth; and
(3) recovering a mineral from the froth.
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Cairns James A.
Collins Forrest L.
Hunter Frederick D.
Lithgow Thomas M.
Silverman Stanley S.
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