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8163063 |
Method of leaching copper sulfide ore with the use of iodine
An object of the present invention is to provide a method of efficiently leaching copper from a copper sulfide ore containing chalcopyrite or enargite as a main constituent under versatile...
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8147797 |
Method and system for heating and cooling slurries
A system for cooling and recuperative heating of a slurry in a metallurgical process which includes heat exchangers, pumps and autoclaves is described herein. The heat exchangers use a non-scaling...
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8119085 |
Heap leaching of sulphide ores
A process for the heap leaching of multiple ores, the process characterized by the process steps of: (i) the agglomeration or wetting of an ore feed; (ii) exposing the agglomerated or wetted ore to...
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8097227 |
Method for thiosulfate leaching of precious metal-containing materials
Processes are provided for recovering precious metals from refractory materials using thiosulfate lixiviants. The processes can employ heap leaching or lixiviants that include one or more blinding...
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8070851 |
Chloride heap leaching
A heap leaching method to recover copper from a primary copper sulphide mineral wherein the mineral is leached in an acidic chloride/sulphate solution in the presence of oxygen with the surface...
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8043399 |
Process for rapid microwave-enhanced detoxification of CCA-treated wood
A method for detoxifying spent CCA (copper, chromium, arsenic) treated wood, from which CCA is efficiently removed from the wood, allowing both the CCA and the wood to be reused has been developed....
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8038974 |
Aqueous solutions containing metal cyanide for cyanide leaching for the winning of gold and silver
The present invention relates to solutions comprising water and at least one metal cyanide, at least a part of the water being obtained from wastewater which occurs as depleted wastewater in a...
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8030055 |
Method of biotreatment for solid materials in a nonstirred surface bioreactor
A method of biotreating and recovering metal values from metal-bearing refractrory sulfide ore using a nonstirred surface bioreactor is provided. According to the method, the surface of a plurality...
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8021461 |
Remedial heap treatment
A system and method are disclosed for improving component extraction from heap leach operations. Following heap leaching for some time, portions of the heap deficient in component extraction are...
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8003066 |
Method for scrubbing amine-type extractant
A method for scrubbing an amine extractant (A) containing an amine added with hydrochloric acid, and an amine binding a metal chloro complex ion, in a scrubbing stage constituting a solvent...
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7998430 |
Production of synthetic rutile by continuous leaching
A reactor 20 has a plurality of tubular downcomers 32, 34, 36, 38, 40 and risers 42, 44, 46, 48, 50, joined by sections 86, 88 in a continuous serpentine path the tubes dimensioned to provide...
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7947108 |
Precious metal recovery using thiocyanate lixiviant
Mineral materials comprising copper and precious metal are subjected to an acidic leach of the copper followed by an acidic thiocyanate leach of the precious metal.
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7892505 |
Hydrometallurgical process for the treatment of metal-bearing sulfide mineral concentrates
A hydrometallurgical process for the treatment of complex silver-bearing sulfide ores and concentrates that recovers substantially all silver, lead, antimony, zinc, copper and sulfur, along with...
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7858056 |
Recovering metals from sulfidic materials
A process for recovering a precious metal from a sulfidic material comprises the steps of preparing an acidic aqueous halide solution having an oxidation potential sufficient to oxidize the...
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7846234 |
Method of precious metal recovery
The proposed invention relates to methods of precious metal recovery and may be applied to the recovery of precious metals from various types of mineral raw source materials containing chlorides of...
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7837760 |
Process to increase the bioleaching speed of ores or concentrates of sulfide metal species, by means of continuous inoculation with leaching solution that contains isolated microorganisms, with or without presence of native microorganisms
The invention publishes a process to increase the bioleaching speed of ores or concentrates of sulfide metal species in heaps, tailing dams, dumps, or other on-site operations. The process is...
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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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7794677 |
Reduction of copper content in the molybdenite concentrate
Methods and systems for removing copper minerals from a molybdenite concentrate. One embodiment provides leaching copper from the molybdenite concentrate with a leaching solution comprising ferric...
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7790646 |
Conversion of fine catalyst into coke-like material
A process for converting fine catalyst slurried in heavy oil into a coke-like material from which catalytic metals can be recovered comprises mixing fine catalyst slurried in heavy oil with...
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7785395 |
Method for the recovery of gold from sulphide concentrate
The invention relates to a method for recovering gold from a sulphidic concentrate, particularly one containing arsenopyrite and/or pyrite, hydro-metallurgically. The concentrate is first subjected...
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7763096 |
Recovery of rhenium
The present invention relates to a method for recovering rhenium from an ethylene oxide catalyst containing rhenium and at least silver on a solid support, wherein at least a substantial portion of...
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7749302 |
Method for the hydrometallurgical treatment of sulfide concentrate containing several valuable metals
The invention relates to a method, by means of which the valuable metals contained in a sulphidic, multicomponent concentrate are recovered using hydrometallurgical treatment. One constituent of...
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7731853 |
Method and equipment for purifying an extraction solution from aqueous entrainment and impurities
The invention relates to a method and equipment with which an organic solution extraction solution is purified from entrainment of aqueous solution and impurities during hydrometallurgical...
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7731777 |
Method for processing anode sludge
The invention relates to a hydrometallurgical method for separating the precious metals and impurities of anode sludge obtained from copper electrolysis. According to the method, anode sludge...
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7727510 |
Method of and apparatus for simulating a biological heap leaching process
A microbiological heap leaching simulation process wherein material, representative of ore in a heap, is microbiologically leached in a housing and the temperature of the material at a plurality of...
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7722840 |
Method for thiosulfate leaching of precious metal-containing materials
Processes are provided for recovering precious metals from refractory materials using thiosulfate lixiviants. The processes can employ heap leaching or lixiviants that include one or more blinding...
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7713500 |
Leaching process
A process for the oxidative leaching of sulphide mineral species, the method characterized by the method steps of: leaching a slurry containing the mineral species in one or more reaction vessels;...
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7682420 |
Method for leaching gold
In a method for leaching gold from copper sulfides, the sulfide ores are first subjected to leaching of copper, thereby producing a leaching residue having 7.9% or less of the copper content. This...
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7615199 |
Method for the recovery of valuable metals and arsenic from a solution
The invention relates to a method for the treatment of material containing at least one valuable metal and arsenic to form a valuable metal-depleted scorodite sediment and a pure aqueous solution...
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7534285 |
Method and apparatus for the recovery of refractory mineral ores
A method for extraction a metal from a mineral ore including a refractory ore contained in a metal. The method includes concentration of refractory ore followed by micronization of the concentrate...
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7514050 |
Processing of acid-consuming mineral materials involving treatment with acidic biooxidation effluent
In one aspect the present invention provides a method of recovering gold from each of at least two different refractory gold-bearing sulfidic mineral materials. A first mineral material is...
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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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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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7438874 |
Pressure oxidation leaching in the presence of an acidic solution of halide and sulfate ions from copper and base metal containing ore/concentrate
A process for the extraction of a base metal such as Ni, Co or Zn, from suiphide ore or concentrate containing copper and the base metal comprises the step of subjecting the ore or concentrate to...
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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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7404937 |
Production of synthetic rutile by continuous leaching
A reactor 20 has a plurality of tubular downcomers 32, 34, 36, 38, 40 and risers 42, 44, 46, 48, 50, joined by sections 86, 88 in a continuous serpentine path the tubes dimensioned to provide...
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7374732 |
Leaching process
A process for the oxidative leaching of sulphide mineral species, the method characterised by the method steps of: leaching a slurry containing the mineral species in one or more reaction vessels;...
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7351343 |
Copper metal recovery system
The present invention generally relates to a copper metal recovery system, able to integrate with a waste treatment system of a circuit board manufacture plant, includes a stirring unit, a...
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7264781 |
Calcining plant and method
Particulate material to be calcined is conditioned and then introduced into a stream of flue gases which transport the material along a sloping drying duct while drying the material. The dried...
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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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7169371 |
Process for the treatment of molybdenum concentrate
A method of treatment or purification of a molybdenum concentrate also containing copper, comprises the step of subjecting the molybdenum concentrate to pressure oxidation in the presence of oxygen...
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7157062 |
Inhibition of the depletion of metal values from pregnant lixiviant solutions
Methods for inhibiting depletion of mineral values from pregnant lixiviant solutions comprise contacting the requisite metal ore with a preg-robbing inhibition agent (PRIA) comprising (I) alkyl...
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7066983 |
Method for thiosulfate leaching of precious metal-containing materials
Processes are provided for recovering precious metals from refractory materials using thiosulfate lixiviants. The processes can employ lixiviants that include at most only small amounts of copper...
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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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6969499 |
Bacterially assisted heap leach
A bacterially assisted heap leach characterized by the steps of: providing an ore heap to oxidize sulphide minerals therein; providing a biological contactor inoculated with ferrous iron oxidizing...
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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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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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6833021 |
Method for treating precious metal bearing minerals
A method of processing a mineral composition comprising a refractory material the method comprising milling the composition to a particle size of P80 of less than 25 microns and leaching said...
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6818191 |
Autoclave control mechanisms for pressure oxidation of molybdenite
The process chemistry during the oxidation of molybdenite concentrates in an oxygen pressure leach can be controlled by regulating the amount of ferric iron and excess sulfuric acid recycled as...
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6777511 |
Process for producing poly (meth) acrylates having reduced metal content
An industrially excellent process for producing a poly(meth)acrylate having a reduced metal content which comprises contacting a mixture of a poly(meth)acrylate and an organic solvent with an...
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