Classifying – separating – and assorting solids – Fluid suspension – Liquid
Patent
1994-10-20
1996-08-13
Lithgow, Thomas M.
Classifying, separating, and assorting solids
Fluid suspension
Liquid
241 20, B03D 102, B03D 106
Patent
active
055447600
ABSTRACT:
An improved method for recovering lead sulfides from a mineral deposits. Pulverized mineral deposit material is mixed with water, agitated with pH adjustment from about 8 to about 10.5 to form a slurry. Rapeseed oil is added to the conditioned slurry to render the surface of the lead sulfide particles hydrophobic. After agitating and adding a frothing agent, air bubbles are injected into the resultant composition to cause hydrophobic lead sulfide particles to become attached to the air bubbles and to rise and form a froth fraction which is then separated and recovered. The process uses substantially non-toxic rapeseed oil as a hydrophilizing agent. The process is less environmentally damaging, less costly and more specific in separating lead sulfides from iron containing minerals which are normally present in ores together with the lead sulfides.
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Chemical Abstracts 107:81479 "Thermal Differentiation Of Oils Used As Collectors In Floatation".
Chemical Abstracts 103:39267 "Chemical Problems With Rape Oil As Floatation Collector".
Jancik, V. "The Possibility Of Using Rape Fatty Acids For Technical Purposes", Birografika, 1964.
Benn Freddy W.
Cornell William L.
Dattilo Marion
Lithgow Thomas M.
Roberts Richard S.
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