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4274870 |
Smelting of copper concentrates by oxygen injection in conventional reverberatory furnaces
A process for the modification to existing and conventional reverberatory furnaces for smelting copper concentrates in such furnaces, for improving the thermal efficiency of the furnace and for...
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4236918 |
Recovery of elemental sulfur and metal values from tailings from copper recovery processes
Process for recovery of copper, molybdenum, gold and elemental sulfur in tailings from hydrometallurgical processing of copper sulfide ores, particularly chalcopyrite. The tailings are usually...
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4198297 |
Removal of trace copper ions from water
Cations, such as copper, are recovered from very dilute aqueous solutions by means of a bubble fractionation process comprising countercurrent contacting of the feed solution with a stream of gas...
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4192851 |
Leaching of metal sulphides
The process of the invention is for the separate recovery of elemental sulfur and residual sulfides and metal salt solution from reaction slurries obtained from leaching of metal sulfides in ores...
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4159943 |
Froth flotation of ores using hydrocarbyl bicarbonates
A froth flotation method for recovering of mineral values of earth alkaline metal minerals such as of magnesium, calcium, strontium, barium; base metal minerals such as of copper, silver, lead,...
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4130415 |
Copper flotation with anti-5-nonyl-2-hydroxybenxophenone oxime
The disclosure is of the use of a class of chelating agents having active nitrogen and oxygen chelating atoms and which form insoluble chelates with copper, as reagents for the recovery of for...
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4130626 |
Flotation separation of iron oxide from undigested matte particles obtained from autoclave leach residues
Undigested matte particles in autoclave leach residues containing iron oxide are separated from iron oxide by subjecting an aqueous slurry thereof to flotation without the use of a flotation...
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4118312 |
Process for the concentration by flotation of fine mesh size or oxidized ores of copper, lead, zinc
The invention relates to the concentration by flotation of fine mesh size and/or oxidized ores. The invention consists in using a chelating agent selected from the β-diketones as flotation...
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4090867 |
Flotation of non-sulphide copper ores
Flotation of a variety of non-sulphide and mixed sulphide plus non-sulphide copper ores is disclosed. Stabilization of non-sulphide copper mineral surfaces by sulphidization is initially required...
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4054516 |
Method for selectively capturing metal ions
A method for selectively capturing metal ions by treating a solution conting ions of heavy metals, such as cupric ions, zinc ions, etc., at an adjusted pH value with a metal capturing agent...
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4024218 |
Process for hydrometallurgical upgrading
This invention relates to a process for hydrometallurgical treatment of concentrates of sulphides of copper, nickel, cobalt, lead and iron and copper-containing mattes. A first embodiment of the...
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4022866 |
Recovery of metals
Copper, zinc and nickel are recovered from sulfide concentrates prepared from ores of one or more such metals by subjecting such concentrate to a leaching operation which comprises slurrying the...
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4011072 |
Flotation of oxidized copper ores
Copper is recovered from an aqueous pulp of an ore containing both sulfide minerals and oxidized minerals by continuously monitoring the EMF of the pulp and adding a water-soluble sulfide to the...
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4006014 |
Use of tetraalkylammonium halides as flotation collectors
A process for the recovery of copper minerals from oxidized ores by flotation employing sulphidization of the oxidized minerals followed by flotation employing a tetraalkylammonium halide as...
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3968032 |
Process for concentrating lead and silver by flotation in products which contain oxidized lead
A flotation process for recovering lead and silver values from electrolytic zinc residues is disclosed. BACKGROUND OF THE INVENTION The present invention relates to a process for reclaiming...
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3819363 |
METAL RECOVERY METHOD
A system for recovering noble metal values from chemically composite ore materials. The process is effective to assay as well as to remove commercial quantities of precious metals associated...
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3728430 |
METHOD FOR PROCESSING COPPER VALUES
The steps of leaching copper values from oxide ores, mixed sulfide-oxide ores, and other oxide copper bearing materials in an aqueous medium or suspension containing soluble sulfites or bisulfites...
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3701421 |
METHOD OF MINERAL SEPARATION BY FROTH FLOATATION
A method of mineral separation by froth floatation in which pulp is fed into a cylindrical tank of height approximately equal to its diameter. The pulp is mechanically agitated, and air at low...
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3426896 |
FLOTATION OF BULK CONCENTRATES OF MOLYBDENUM AND COPPER SULFIDE MINERALS AND SEPARATION THEREOF
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3403020 |
Leaching of copper from ores with cyanide and recovery of copper from cyanide solutions
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3339730 |
Froth flotation method with counter-current separation
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3230071 |
Recovery of metal values from complex ores
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3203968 |
Ion flotation method
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3202281 |
Method for the flotation of finely divided minerals
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3168396 |
Recovery of mineral values from ore
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2989394 |
Heat treatment and concentration of oxide ores
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2878102 |
Recovery of metallic and non-metallic values from sulfide and sulfide-oxide ores
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2838369 |
Process for the concentration of ores containing gold and uranium
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2807533 |
Silver recovery method
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3582317 |
Title is not available
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3834896 |
Title is not available
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