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Method for rendering refractory sulfide ores more susceptible to biooxidation
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5603411 METHOD FOR SEPARATING MIXTURE: OF FINELY DIVIDED MINERALS Williams Danny; ‘Gantt George E; Behl Sanja; Willis Mitchell J Macon, GA, UNITED STATES assigned to Engelhard Corporation A selective flocculation process that uses a mixture of dispersants including soda ash to disperse a slimed ore pulp prior to conditioning with a fatty acid, salt and then a polymeric flocculating agent.
5611839 METHOD FOR RENDERING REFRACTORY SULFIDE ORES MORE SUSCEPTIBLE TO BI~OOXIDATION Kohr William San Mateo, CA, UNITED STATES assigned to Geobiotics Inc A method of recovering precious metal values from refractory sulfide ores is provided. The method includes the steps Iofseparating clays and fines from a crushed refractory sulfide ore, forming a heap from the refractory sulfide ore, bioleaching the heap to thereby oxidize iron sulfides contained therein, and hydrometullurgically treating the bioleached ore to recover the precious metal values. If sufficient quantity of precious metal values are contained in the separated clays and fines, these materials can be further processed to recover the precious metal values contained therein.
1043
about 40 to about 60 cglg. The composition may further contain an acid to assist in the dispersion of the amine in water.
5611917 FLOTATION CELL CROWDER DEVICE Degner Vernon R Colsax, CA, UNITED STATES assigned to Baker Hughes Incorporated A froth crowder device is disclosed for incorporation into a froth flotation cell to improve the froth removal dynamics of the flotation cell. The froth crowder device is positioned within a froth flotation cell above and below the ovefflow launder, and provides a sloped surface to direct froth toward the overflow launder in an expedited manner. Experimental data confirms that use of a froth crowder device as disclosed expedites movement of the froth toward the launder for more efficient operation, permits operating the rotor of the flotation cell at reduced speeds without compromising the efficiency of operation, and reduces the amount of air necessary to produce a froth in the cell. Experimental data also confirms that little or no surface eddies are observed in froth flotation cells in which a crowder device as disclosed is used. By comparison, flotation cells without use of a crowder device experience increased occurrences of surface eddies which traps the froth within the tank and extends froth residency time to the ultimate detriment of separation efficiency.
5612431 5611916 AQUEOUS COMPOSITION USEFUL IN ORE FLOTATION CONTAINING ALIPHATIC AMINE Laskowski Janusz !5;Wang Qu Richmond, CANADA assigned to The University of British Columbia A composition, adapted to be used in the beneficiation of coarse potash ore fractions in the substantial absence of extender oil, which consists essentially of: (a) water; and (b) a long chain primary aliphatic amine, for example, a tallow-based amine, having an iodine value of from about 20 to about 70 cg/g, preferably from
LEACHING OF PRECIOUS METAL ORE WITH FLUOROALIPHATIC SURFACTANT Waddell Jennifer E, Sierakowski Michael J; Savu Patricia M; Moore George G, Jariwala Chetan; Guerra Miguel A Bumsville, MN, UNITED STATES assigned to Minnesota Mining and Manufacturing Company A method for improving the recovery of gold and silver from precious metal ore is disclosed. The method comprises contacting precious metal ore with an aqueous solution containing certain fluoroaliphatic SlllfaCtantS.
5603411 METHOD FOR SEPARATING MIXTURE: OF FINELY DIVIDED MINERALS Williams Danny; ‘Gantt George E; Behl Sanja; Willis Mitchell J Macon, GA, UNITED STATES assigned to Engelhard Corporation A selective flocculation process that uses a mixture of dispersants including soda ash to disperse a slimed ore pulp prior to conditioning with a fatty acid, salt and then a polymeric flocculating agent.
5611839 METHOD FOR RENDERING REFRACTORY SULFIDE ORES MORE SUSCEPTIBLE TO BI~OOXIDATION Kohr William San Mateo, CA, UNITED STATES assigned to Geobiotics Inc A method of recovering precious metal values from refractory sulfide ores is provided. The method includes the steps Iofseparating clays and fines from a crushed refractory sulfide ore, forming a heap from the refractory sulfide ore, bioleaching the heap to thereby oxidize iron sulfides contained therein, and hydrometullurgically treating the bioleached ore to recover the precious metal values. If sufficient quantity of precious metal values are contained in the separated clays and fines, these materials can be further processed to recover the precious metal values contained therein.
1043
about 40 to about 60 cglg. The composition may further contain an acid to assist in the dispersion of the amine in water.
5611917 FLOTATION CELL CROWDER DEVICE Degner Vernon R Colsax, CA, UNITED STATES assigned to Baker Hughes Incorporated A froth crowder device is disclosed for incorporation into a froth flotation cell to improve the froth removal dynamics of the flotation cell. The froth crowder device is positioned within a froth flotation cell above and below the ovefflow launder, and provides a sloped surface to direct froth toward the overflow launder in an expedited manner. Experimental data confirms that use of a froth crowder device as disclosed expedites movement of the froth toward the launder for more efficient operation, permits operating the rotor of the flotation cell at reduced speeds without compromising the efficiency of operation, and reduces the amount of air necessary to produce a froth in the cell. Experimental data also confirms that little or no surface eddies are observed in froth flotation cells in which a crowder device as disclosed is used. By comparison, flotation cells without use of a crowder device experience increased occurrences of surface eddies which traps the froth within the tank and extends froth residency time to the ultimate detriment of separation efficiency.
5612431 5611916 AQUEOUS COMPOSITION USEFUL IN ORE FLOTATION CONTAINING ALIPHATIC AMINE Laskowski Janusz !5;Wang Qu Richmond, CANADA assigned to The University of British Columbia A composition, adapted to be used in the beneficiation of coarse potash ore fractions in the substantial absence of extender oil, which consists essentially of: (a) water; and (b) a long chain primary aliphatic amine, for example, a tallow-based amine, having an iodine value of from about 20 to about 70 cg/g, preferably from
LEACHING OF PRECIOUS METAL ORE WITH FLUOROALIPHATIC SURFACTANT Waddell Jennifer E, Sierakowski Michael J; Savu Patricia M; Moore George G, Jariwala Chetan; Guerra Miguel A Bumsville, MN, UNITED STATES assigned to Minnesota Mining and Manufacturing Company A method for improving the recovery of gold and silver from precious metal ore is disclosed. The method comprises contacting precious metal ore with an aqueous solution containing certain fluoroaliphatic SlllfaCtantS.