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7615100 |
Method for the precipation of silica in connection with zinc ore leaching
The invention relates to a method for the leaching of oxidized ores and in particular zinc ores. The ore, wherein the valuable metals are at least partially in silicate form, are routed to an...
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7578868 |
Metal recovery from a tank bioleaching solution with the use of coated magnetic particles
Small magnetic particles are introduced into a solution which is subjected to a bioleaching process. The particles are coated with a substance which has a selective affinity for, and which...
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7575623 |
Method for leaching aluminium-metal alloys
A method is described of treating aluminium-metal alloys with organic or inorganic bases by exposing them to an aqueous solution of the base, removing the aqueous base and washing the treated alloy...
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7575622 |
Heap leach process
The invention discloses a method of controlling a heap leach process through controlling an irrigation rate of a heap as a function of at least one of an aeration rate of the heap, a determination...
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7572418 |
Process to obtain titanium concentrates with high contents of TiO2 and low contents of radionuclide elements from anatase mechanical concentrates
A process for production of titanium concentrate with low contents of radionuclide elements from anatase mechanical concentrates. The process involves calcination in air and reduction with hydrogen...
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7563304 |
Heap bioleaching process
A heap bioleaching process wherein carbon, in the form of a carbonate, carbon dioxide or organic carbon, is added to the heap when the temperature in the heap is in the range of 45° C. to 60° C....
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7559972 |
Process for enhanced acid leaching of laterite ores
A process is described for the recovery of nickel and cobalt from a nickeliferous laterite ore including the steps of: providing a nickeliferous laterite ore and separating that ore into its low...
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7534407 |
Recovery of nickel
A process for recovering nickel from a solid feed material containing nickel in the form of millerite is disclosed. The process includes treating a slurry of the solid feed material and a process...
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7527771 |
Dissolving metal particles from supported catalyst using ultrasonic energy, solvent and etchant
A sample preparation method for characterization of nanoparticles embedded in the supports of heterogeneous catalysts, with improved particle dispersion, is introduced. The supported catalyst is...
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7517384 |
Method for improving metals recovery using high temperature pressure leaching
The present invention is directed to a system for recovering metal values from metal-bearing materials. During a reactive process, a seeding agent is introduced to provide a nucleation site for the...
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7510593 |
Method for producing concentrates
The invention relates to a method for processing concentrates, particularly concentrates produced from copper sulfide-based ores. According to the method, the concentrate ( 4 ) to be processed,...
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7494529 |
Optimization of bioleaching process
A method for optimizing a bioleaching process, at least in respect of heat generation and primary copper sulphide leaching, by actively monitoring and controlling inorganic and organic compounds in...
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7494528 |
Method for smelting copper concentrates
The invention relates to a method for smelting sulfidic copper concentrates, in which method copper sulfide bearing material is smelted in a smelting furnace ( 1 ) for creating blister copper and...
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7488370 |
Reducing cyanide consumption in gold recovery from finely ground sulphide ores and concentrates
Precious metals such as gold can be extracted from a refractory ore using a conventional cyanide leaching step and with reduced cyanide consumption by pre-treating the ore prior to cyanide...
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7465334 |
Zinc recovery process
A process for the recovery of zinc metal from a zinc mineral includes the steps of leaching the zinc mineral in a solution including a halide species formed from two or more different halides, to...
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7455716 |
High temperature heap bioleaching process
A heap is constructed with hypogenic copper sulfide bearing ore to include exposed sulfide mineral particles at least 25 weight % of which are hypogenic copper sulfides. The concentration of the...
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7455715 |
Heap bioleaching process for the extraction of zinc
A method of extracting zinc from a sulphidic ore is provided which comprises bioleaching the ore in a heap with acidophilic microorganisms to produce a pregnant leach solution which is recovered...
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7449160 |
Process of solvent extraction of copper
A process for efficient separation/recovery of copper involving selective extraction of the copper ion with the aid of an organic extractant from an aqueous chloride solution containing copper and...
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7416712 |
Method for obtaining cobalt and nickel from ores and ore concentrates
The invention relates to a method for obtaining metals from a cobalt and/or nickel arsenic sulfide ore or ore concentrate and/or a cobalt and/or nickel sulfide ore or ore concentrate, according to...
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7399454 |
Metallurgical dust reclamation process
Improved methods for treating metallurgical compositions involve reacting a metallurgical composition with an aqueous nitric acid solution. The reaction is performed at a pressure of at least about...
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7341700 |
Method for recovery of metals from metal-containing materials using medium temperature pressure leaching
The present invention relates generally to a process for recovering copper and other metal values from metal-containing materials using controlled, super-fine grinding and medium temperature...
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7311786 |
Passivation of sulfidic iron-containing rock
A method for passivating sulfidic iron-containing rock comprising: contacting sulfidic iron-containing rock with a magnesium-containing substance, a manganese-containing substance, and a...
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7294168 |
Method for purifying the solution in the hydrometallurgical processing of copper
The invention relates to the removal of bivalent copper from copper chloride solution in connection with the hydrometallurgical production of copper. In the copper production process, a...
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7214256 |
Solvent extraction process
A circuit configuration for a metal solvent extraction plant comprising:
A) an extraction section for extracting metal ions from an aqueous leach solution containing the metal ions with an...
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7166144 |
Interlaced series parallel configuration for metal solvent extraction plants
An interlaced series parallel configuration for the extraction of metal values from an metal value containing aqueous is a special series parallel configuration wherein the stripped organic is...
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7128840 |
Ultrasound enhanced process for extracting metal species in supercritical fluids
Improved methods for the extraction or dissolution of metals, metalloids or their oxides, especially lanthanides, actinides, uranium or their oxides, into supercritical solvents containing an...
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7041152 |
Method for processing elemental sulfur-bearing materials using high temperature pressure leaching
The present invention relates generally to a process for the production of sulfuric acid and liberation of precious metal values from materials containing sulfur through pressure leaching...
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7037357 |
Recovery of metals from jarosite-containing materials
A method to dissolve at least one metal from jarosite or other iron hydroxyl sulphate containing-material which includes the steps of subjecting the material to alkaline treatment in a brine...
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7033480 |
Process for recovering platinum group metals from material containing base metals
The process of the present invention recovers platinum group metal(s), such as platinum and palladium, from PGM-containing materials containing base metals, such as copper and nickel. The process...
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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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6929677 |
Method for leaching copper concentrate
This invention relates to a method where sulfidic iron-bearing copper concentrate is leached on the countercurrent principle, in a chloride environment. The leaching takes place with the aid of...
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6896808 |
Recovery of metal values from aqueous solutions and slurries
The invention generally relates to a process for the recovery or removal of metal species from a solution or slurry comprising the steps of: a) contacting the solution or slurry with a polymeric...
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6884280 |
Heat transfer in heap leaching of sulphide ores
A method of leaching sulphide mineral concentrates wherein heat generated by bioleaching of sulphide mineral concentrates in at least one reactor is transferred into a heap in which bio-assisted...
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6852237 |
Method for improved recovery of metals
Methodology for the extraction of metallic elements from solid and liquid metal-contaminated starting material such as mineral ores, recyclable wastes, contaminated soils, engraving solutions,...
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6846346 |
Sulfatization process for metal extraction from sulfide ores
The invention provides a hydrometallurgical process for treating metal-containing sulfide ores and concentrates, comprising reacting said metal-containing sulfide with concentrated sulfuric acid at...
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6835230 |
Method for leaching zinc concentrate
A method of leaching zinc from a zinc concentrate comprising leaching a zinc concentrate in an aqueous solution containing free sulfuric acid and ferric ions, whereby elemental sulfur is deposited...
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6833020 |
Recovery of copper from copper bearing sulphide minerals by bioleaching with controlled oxygen feed
A method of recovering copper from a copper bearing sulphide mineral which includes the steps of subjecting the slurry to a bioleaching process, supplying a feed gas which contains in excess of 21%...
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6797326 |
Method of making polycrystalline diamond with working surfaces depleted of catalyzing material
Griffin, Nigel, et al78.1081-1.3-29 Disclosed is a method for manufacturing a polycrystalline diamond or diamond-like element with greatly improved wear resistance without loss of impact strength....
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6773485 |
Method for recovering catalytic metals using a porous metal filter
A method for recovering catalytic metals from fluid compositions containing catalytic metal colloids. Fluid compositions such as aqueous rinse solutions or dragout baths containing catalytic metal...
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6755891 |
Process for the treatment or removal of impurities in a hydrometallurgical extraction process
A Process for the treatment or removal of impurities, such as arsenic, antimony or bismuth, generated as by-products during smelting and refining of copper concentrates, comprises subjecting the...
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6746512 |
Hydrometallurgical extraction of copper and other valuable metals
A hydrometallurgical process for extracting copper and any one or more than one of zinc, silver and gold from a sulphide ore or concentrate is disclosed. The process includes a range of mineral...
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6743276 |
Method and apparatus for solar heating a mining leach solution
A method and apparatus for solar heating a leach solution prior to its distribution over an ore heap. The apparatus includes a heat absorbing mat having a series of individual heat absorbing tubes...
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6733567 |
Recovery of nickel from nickel bearing sulphide minerals by bioleaching
A method of recovering nickel from a nickel bearing sulphide mineral slurry which includes the steps of subjecting the slurry to a bioleaching process, supplying a feed gas which contains in excess...
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6669757 |
Method for extracting metal from glass waste
A method and systems are provided for extracting heavy metal from glass waste. Glass is initially crushed to a diameter size between about 10 nanometers and about 2 millimeters. The glass is then...
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6641642 |
High temperature pressure oxidation of ores and ore concentrates containing silver using controlled precipitation of sulfate species
A method for the treatment of sulfide ores containing silver by pressure oxidation. The method includes the addition of a sulfate-binding material to reduce the formation of jarosite species during...
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6569224 |
Hydrometallurgical process for the recovery of nickel and cobalt values from a sulfidic flotation concentrate
A hydrometallurgical process for the recovery of nickel and cobalt values from a sulfidic flotation concentrate. The process involves forming a slurry of the sulfidic flotation concentrate in an...
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6554915 |
Dissolution of nickel in non-oxidizing aqueous acid solutions
Fairly pure metallic nickel may be efficiently dissolved in non-oxidizing acid. If the nickel includes individual pieces longer than 0.5 mm in any linear dimension, oxidizing agent is preferably...
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6503293 |
Process for the extraction of copper
A process for the extraction of copper from a copper sulphide containing concentrate such as chalcopyrite, involves dispersing the finely divided copper sulphide containing concentrate in an...
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6500232 |
Interfacial crud removal system for solvent extraction and method for solvent extraction
Process and equipment for the removal of crud from the interface between aqueous and organic layers in SX settlers in which at least one rotatable auger is positioned at or near the interface to...
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6485542 |
Ni-Fe alloy sputtering target for forming magnetic thin films, magnetic thin film, and method of manufacturing the Ni-Fe alloy sputtering target
An Ni—Fe alloy material suitable for forming a ferromagnetic Ni—Fe alloy thin film is provided. The magnetic thin film produces a small number of particles during sputtering, and excels in...
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