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8088347 |
Process for recovering copper sulphide from copper bearing ores by froth flotation
Process for recovering copper sulphide and optionally molybdenum sulphide from a copper bearing ore by froth flotation includes crushing said ore,mixing the obtained ground powder with at least a...
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8025859 |
Process for gold and silver recovery from a sulphide concentrate
A process for the extraction of a precious metal, such as gold or silver, from a sulphide ore or concentrate or other source material comprises subjecting the source material to pressure oxidation...
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7922788 |
Process for recovering gold and silver from refractory ores
The present invention is directed to flotation of refractory gold sulfide ores in which the ore is ground, floated, the tailings reground, and refloated to produce gold-bearing concentrates.
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7811534 |
Method for the treatment of copper-bearing materials
The present invention relates to a method for the treatment of copper-bearing materials, such as copper concentrates, so that the impurities and gangue minerals in the materials, such as silicates,...
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7576244 |
Compounds and compositions for use as foaming or frothing agents in ore and coal flotation
Compounds of formula (I) wherein R1 and R2 are each independently C1-C2 alkyl, and m is 1, 2, 3, 4, or 5 and compositions of formula (II) wherein R1 and R2 are each independently C1-C4 alkyl, and n...
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7491372 |
Procedure to leach copper concentrates, under pressure and at ambient temperature, by forming a reactive gel in a sulfate-chloride medium
A chemical process to leach copper concentrates in the presence of a concentrated solution of sulfates and chlorides. The process includes forming a high reactivity chemical paste containing a high...
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7482495 |
Process for making alkylene glycol ether compositions useful for metal recovery
A process for making an alkylene glycol ether composition is disclosed. In one aspect, the process comprises reacting propylene glycol methyl ether (PM) with from 1.5 to 3 equivalents of propylene...
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7435405 |
Anti-oxidation method for sulfide minerals in sulfide ore
By suppressing oxidation of sulfide minerals in sulfide ore due to bacteria or the like, this invention prevents the elution of heavy metals from the sulfide ore, and reduces the decrease in...
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7387767 |
Recovery of nickel, cobalt, iron, silica, zinc and copper from laterite ore by sulfuric acid leaching
A process for recovering nickel and cobalt values from nickel- and cobalt-containing laterite ores as an enriched mixed nickel and cobalt sulphide intermediate and for producing nickel and cobalt...
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7219804 |
Flotation processing including recovery of soluble nonferrous base metal values
A method of flotation processing ores and other mineral materials containing soluble nonferrous base metal and sulfide minerals involves dissolving the soluble nonferrous base metal and...
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7018593 |
Base metal recovery from a tailings dump by bacterial oxidation
A method of recovering base metal from a tailings dump which includes the steps of: aerating a surface layer of the dump; adjusting the pH and the moisture content of the surface layer to provide...
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6965629 |
Method and apparatus for initiating a pulsed arc discharge for nanopowder synthesis
A nanopowder synthesis system having an autofuser device which obviates the need for external power switches, and which accommodates repeated discharges (of the order of 107) between ablating...
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6953120 |
Method of recovering metal and/or oxide thereof in a slurry and tailings obtained from said method
A method of recovering metal and/or oxide thereof from a slurry is described. The method involves magnetically separating at least a portion of any magnetic impurities from the slurry and then...
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6875254 |
Methods for detecting and extracting gold
Methods for detecting gold and quantitating gold in ore samples utilizing a gold-specific protein are provided, including methods for multiple sample handling. Also provided are methods for...
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H002082 |
Oxidized normal paraffinic products and their application
A flotation agent including an oxidized paraffinic product which may be a Fischer-Tropach reaction product obtained by way of the Fischer-Tropsch reaction from carbon monoxide and hydrogen feed. A...
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6251163 |
Method for recovering gold from refractory carbonaceous ores
The process of the present invention recovers precious metals from refractory carbonaceous precious metal ores by floating a portion of the ground ore, blending the concentrate with an unfloated...
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6210648 |
Method for processing refractory auriferous sulfide ores involving preparation of a sulfide concentrate
A method is provided for flotation of refractory auriferous sulfide using an oxygen-deficient flotation gas. The method is particularly suited for non-selective flotation of different...
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6200377 |
Process for beneficiation of mixtures of mineral particles
An improved process for the beneficiation of mixtures of mineral particles (such as kaolin clays) containing minerals which chelate with hydroxamates. The use of a silicon-containing compound in...
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5902977 |
Flotation cell and method
The present invention provides a process that employs both non-selective flotation and oxidative leaching of the resulting concentrates to recover an increased amount of copper from porphyry copper...
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5837210 |
Method for processing gold-bearing sulfide ores involving preparation of a sulfide concentrate
Provided is a method for processing a gold-bearing sulfide ore which involves maintaining the ore in a substantially oxygen free environment, preferably beginning with comminution of the ore and...
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5807479 |
Process for recovering copper from copper-containing material
The present invention provides a process that employs both non-selective flotation and oxidative leaching of the resulting concentrates to recover an increased amount of copper from porphyry copper...
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5792235 |
Method for recovering gold and other precious metals from carbonaceous ores
A method for recovering precious metals from carbonaceous ore comprising leaching the ore with a lixiviant solution and then preg-robbingly concentrating the precious metal-lixiviant complexes in...
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5770170 |
Recovery of zinc from sulphidic concentrates
There is provided a novel class of additives, specifically coals, which are useful in zinc extraction processes involving one or more pressure leach stages carried out at temperatures above the...
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5653945 |
Method for processing gold-bearing sulfide ores involving preparation of a sulfide concentrate
Provided is a method for processing a gold-bearing sulfide ore which involves maintaining the ore in a substantially oxygen free environment, preferably beginning with comminution of the ore and...
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5348713 |
Recovery of metal values from zinc plant residues
A process is disclosed for recovering zinc, lead, copper and precious metals from zinc plant residue, said process comprising leaching the residue with return zinc spent electrolyte, neutralizing...
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5320759 |
Selective recovery of heavy metals using xanthates
A process for selectively recovering dissolved heavy metals from a solution is disclosed that involves selectively reacting a xanthate with such dissolved heavy metals. Selective reaction of a...
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5108495 |
Method controlling a process by impedance analysis
The invention relates to a method for controlling a process operating by means of the electrochemical potential, in which process complex ores and/or concentrates are treated in order to arrange...
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5074993 |
Flotation process
A method of flotation of sulfides wherein pyrrhotite is depressed by use of a water-soluble polyamine while non-ferrous metal-containing sulfide or sulfidized minerals are floated selectively.
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5013359 |
Process for recovering gold from refractory sulfidic ores
A process for recovering gold from a refractory sulfidic ore which has been suspended in an aqueous slurry and oxidized using nitric acid so that substantially all of the gold in the ore is made...
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4879022 |
Ore flotation process and use of mixed hydrocarbyl dithiophosphoric acids and salts thereof
The present invention relates to an improved process for beneficiating an ore containing sulfide materials with selective rejection of pyrite, pyrrhotite and other metals and gangue. In particular,...
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4853114 |
Method for the depressing of hydrous, layered silicates
A process for the recovery of mineral values from base metal ores is disclosed. Specifically, a froth flotation process is disclosed which comprises contacting an aqueous ore slurry with an...
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4851036 |
Mineral ore flotation process and apparatus
There is disclosed a process and an apparatus for beneficiating a mineral ore, such as phosphate-containing ore, in a substantially vertical column. The feed subjected to the benefication...
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4797202 |
Froth flotation method
Minerals are recovered from ore by subjecting the ore, in the form of an aqueous pulp, to a froth flotation process in the presence of a collector of the formula: R1 --X--(R)n --N--(R2)2 (Ia)or R1...
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4793852 |
Process for the recovery of non-ferrous metal sulfides
This invention relates to a method of recovering non-ferrous metal sulfides from a metal ore which comprises subjecting the metal ore, in the form of an aqueous pulp, to a froth flotation process...
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RE32786 |
Neutral hydrocarboxycarbonyl thiourea sulfide collectors
New and improved collector compositions for use in froth flotation processes for the beneficiation of mineral values from base metal sulfide ores are disclosed. The collector compositions comprise...
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4786318 |
Thickening of gold process slurries
A process for thickening gold ore slurries or slimes for gold purification which comprises adding to such gold ore slimes an effective amount of flocculant comprising a terpolymer containing 5-35...
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4747940 |
Ore flotation and tri-alkali metal-di(carboxyalkyl) dithiocarbamate and triammonium-di(carboxyalkyl) dithiocarbamate flotation agents for use therein
Tri-alkali metal di(carboxyalkyl) dithiocarbamates and triammonium-di(carboxyalkyl) dithiocarbamates which can be characterized by the formula ##STR1## wherein R and R' can be the same or different...
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4735783 |
Process for increasing the selectivity of mineral flotation
An aqueous solution containing a water soluble polyvalent metal sulphate, an alkali metal silicate and an alkali metal metabisulphite is described which is added to a slurry of a copper mineral...
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4710361 |
Gold recovery by sulhydric-fatty acid flotation as applied to gold ores/cyanidation tailings
Gold values are obtained from gold cyanidation tailings or gold bearing ores by treating the same with a flotation collector consisting of 5 to 20% xanthate collector and 80 to 95% fatty acid...
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4663279 |
Method of beneficiation of complex sulfide ores
A method of beneficiation of complex sulfide ores comprises crushing and grinding complex sulfide ore containing sulfides of copper, zinc, iron and other minerals, subjecting the ground ores to...
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4606764 |
Method of recovering metals from ores using a formate reducing agent
The invention comprises the treatment of metal oxides and mixed metal oxides and metal sulfides in a vertical tube reactor system having a downcomer section and a riser section in order to oxidize...
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4597791 |
Gold recovery processes
The present invention relates to a process for the separation of gold from particulate material containing gold, which comprises introducing a hydrophobic liquid, a non-gold particulate hydrophobic...
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4585561 |
Flotation process for the continuous recovery of silver or silver compounds from solutions or dispersions
A flotation process for the continuous recovery of silver or silver compounds from solutions or dispersions is described, wherein finely divided, inert gas bubbles are injected into the dispersions...
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4579589 |
Process for the recovery of precious metals from a roaster calcine leach residue
A process for separating precious metals from a roaster calcine leach residue from a process wherein copper or zinc sulfides are roasted to produce a copper or zinc calcine; the calcine is leached...
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4579586 |
Mercaptohydroxy alkanes
Dimercaptodihydroxy alkanes are used as a curing agent for epoxide resins and as ore flotation agents.
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4554137 |
Enrichment of minerals by flotation and collector agents employed for this purpose
Process of enrichment of minerals by flotation by means of a collector comprising a thio-compound, the thio-compound being a straight or branched dialkyl or dialkenyl polysulphide.
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4545963 |
Process for separately recovering zinc and lead values from zinc and lead containing sulphidic ore
A process for separately recovering zinc and lead values from zinc and lead containing sulphidic ore which also contains iron comprises subjecting ground ore to a first flotation step to float an...
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4511540 |
Exploitation of copper, nickel and cobalt by treating manganiferous matrix oxidized ores
Process for treating oxidized ores with a manganiferous matrix to recover the small quantities of copper, nickel and cobalt, which consists of attacking the aforementioned ore by means of an...
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4460459 |
Sequential flotation of sulfide ores
A sequential flotation process for the recovery of high-grade concentrates of copper, lead and cobalt-nickel from sulfide ores is provided. A primary grind ore pulp is conditioned with SO2 as H2...
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4404022 |
Dore slag treatment
A method is disclosed for treating dore slag resulting from smelting of a dore furnace charge, by grinding such slag and then subjecting the obtained pulp to froth flotation in the presence of a...
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