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5626648 |
Recovery of nickel from bioleach solution
A bioleaching method is provided for recovering nickel from an ore selected from the group consisting nickel-containing lateritic ores and nickel-containing sulfidic ores or concentrates thereof....
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5618331 |
Vapor phase fluidized bed sulfation of titaniferous materials
An economic, non-polluting vapor-phase system of extracting titanium values from titanium ore or slag comprises solubilizing titanium (in ore or slag) with sulfuric acid to form titanyl sulfate,...
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5616168 |
Hydrometallurgical processing of impurity streams generated during the pyrometallurgy of copper
Impurity streams generated during the metallurgy of copper are hydrometallurgically processed at ambient pressure for recovery of primary values in an energy-efficient manner and with the capture...
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5613998 |
Reclamation process for tungsten carbide and tungsten-based materials
Tungsten carbide and/or tungsten can be recycled by oxidizing the tungsten composition at a temperature greater than 700° C. to form a water insoluble tungsten trioxide. This is then reduced to...
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5603750 |
Fluorocarbon fluids as gas carriers to aid in precious and base metal heap leaching operations
This invention provides an improved method of leaching precious and base metal values from ore comprising contacting a metal-bearing ore or ore concentrate with an oxidizing gas solution comprising...
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5601632 |
Method and an apparatus for the purification of residual products from flue gas purification plants
A method and an apparatus for the purification of residual products from flue gas purification plants. Between a wet-desulphurization plant (1) for flue gas and an associated waste water-treatment...
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5601658 |
Method of treating lead-containing surfaces to passivate the surface lead
A method for treating bronze or brass fixtures containing lead with a cupric acetate solution is described. The treatment results in decreased amounts of lead in subsequent use. A preferred...
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5587001 |
Process for treating iron-containing sulfidic rocks and ores
A process is provided for pretreating iron-containing sulfidic ores of precious metals or other such sulfidic rocks with a source of manganate ions prior to lixiviation to form a layer of manganese...
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5575907 |
Process for the recovery of raw materials from presorted collected waste, especially scrap electrochemical batteries and accumulators
The invention relates to a process for the recovery of raw materials from presorted collected waste, especially scrap electrochemical batteries and accumulators in which the scrap (10)is first...
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5571308 |
Method for recovering nickel from high magnesium-containing Ni-Fe-Mg lateritic ore
A method is provided for recovering nickel from high magnesium-containing lateritic ores which also contain iron. The ores which are referred to as saprolitic ores are subjected to leaching with a...
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5549811 |
Process for decontamination soils polluted with metals
The invention relates to a hydrometallurgical process for decontaminating soils 1 which are polluted with metallic elements, comprising a stage of basic leaching I so as to bring about the...
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5529606 |
Oxidation process and the separation of metals from ore
An oxidation process uses an inclined raceway which has a plurality of longitudinally spaced transverse riffles across the raceway so that a slurry of water and particles to be oxidized runs over...
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5527382 |
Hydrometallurgical process for the treatment of copper bearing ore
A hydrometallurgical process for recovering copper from copper bearing ores or fractions, by a process of first wetting and sulfatizing the ore with controlled amounts of H 2 SO 4 and water,...
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5512636 |
Cationic graft polymer agglomeration agents for mineral bearing ores
Agglomerating agent and method for use in heap leaching of mineral bearing ores. Cationic polymers alone or in combination with cement or lime are highly effective agglomerating agents in acidic or...
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5503656 |
Metal recovery and recycling method and system
A system and method for recovering metal contaminants from soil, including a leaching subsystem and a metal recovery system.
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5492554 |
Method for producing high-grade nickel matte from at least partly pyrometallurgically refined nickel-bearing raw materials
The invention relates to a method for producing high-grade nickel matte and slag in a combination of a suspension smelting furnace and some other furnace without charge-type converting, so that at...
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5482534 |
Extraction or recovery of non-ferrous metal values from arsenic-containing materials
A process suitable for the extraction or recovery of metal values from arsenic containing feeds and including the steps of: a) treating the feed with a nitric acid-containing leachant solution in...
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5431713 |
Method for the reclamation of metallic compounds from zinc and lead containing dust
A method for the reclamation of zinc, lead, tin, cadmium and copper from dust containing such elements or compounds which involves leaching the dust with sulfuric acid or ammonium bisulfate,...
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5429661 |
Method of recovering lead from recycable lead-containing raw material
A method of recovering lead is proposed, wherein preliminarily crushed recycable raw material composed of spent lead-sulphuric acid storage batteries is subjected to treatment with an alkaline...
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5427606 |
Base metals recovery by adsorption of cyano complexes on activated carbon
A recovery method for base metal values (e.g. copper) from ore slurry or aqueous solution, comprising forming a solution of a metal complex (e.g. cyano-copper) having an affinity for adsorption...
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5411574 |
Titanium extraction
A process for producing a titanium product, which process includes: providing a titanium-containing material; and a leaching composition including: a source of ammonia or ammonium ions; a source of...
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5397380 |
Method for processing complex metal sulphide materials
A process for the treatment of complex metal sulphide materials and for the recovery of metal values from such materials. The process involves first subjecting the material to a leaching process...
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5387276 |
Method of leaching mineral values from oil sand tailings
A method of removal of valuable minerals of oil sand tailings including continuous operation of mixing said tailings with acid, curing the agglomeration and leaching of the cured agglomeration for...
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5385600 |
Method for beneficiating nickel sulfide concentrates and corresponding mixtures, unsuitable for smelting
The invention relates to a method for fully beneficating nickel sulfide concentrates or other corresponding mixtures, unsuitable for smelting, by combining the use of both pyrometallurgical and...
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5380354 |
Recovery of metals from sulphidic material
A process for recovering zinc and iron from zinc- and iron-containing sulphidic material, which also contains lead and silver, in which the sulphidic material is leached under oxidizing conditions...
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5344479 |
Upgrading copper sulphide residues containing nickel and arsenic
A process is disclosed for separating and recovering nickel and copper values from a nickel-copper matte which may contain iron and arsenic. Finely divided nickel-copper matte is leached in aqueous...
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5316567 |
Hydrometallurgical copper extraction process
A process for the extraction of copper from a sulphide copper ore or concentrate comprises the steps of subjecting the ore or concentrate to agitation leaching at an elevated temperature and...
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5248342 |
Methods for processing battery waste and other lead-contaminated materials
The present invention is directed to improved methods for processing battery wastes, battery casing debris and other lead contaminated materials. The improved processes of the present invention...
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5246486 |
Biooxidation process for recovery of gold from heaps of low-grade sulfidic and carbonaceous sulfidic ore materials
A process for biooxidation of sulfides in a heap of mineral ores by freeing precious metals dispersed or occluded within said ores as pyritic or arsenopyritic sulfides and the like; the process...
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5244493 |
Biometallurgical treatment of precious metal ores having refractory carbon content
A method is provided for the recovery of precious metal values, such as gold and silver, from refractory carbonaceous, or carbonaceous-sulfidic ore material. The ore material is inoculated using a...
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5238489 |
Leaching/flotation scrap treatment method
A method of treating a mixture of Nd 2 Fe 14 B and SmCo 5 alloy scrap or waste particulates wherein the mixture is introduced to a bath of sulfuric acid solution to selectively dissolve the Nd 2...
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5232491 |
Activation of a mineral species
A method of activating a mineral species wherein the mineral species is activated by fine or ultra fine milling prior to processing by methods of oxidative hydrometallurgy. The milled mineral...
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5228903 |
Method for stripping metals in solvent extraction
Aqueous solutions containing metal cations, that may include cations of both desired metal and impurity or secondary metal, are treated with an organic liquid extractant suitable for the extraction...
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5211818 |
Method for recovering lead from batteries
A method and apparatus for recovering lead from scrap lead/acid batteries involves first mechanically breaking up the batteries into small pieces, then feeding the small pieces into a substantially...
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5211745 |
Nickel processing
A method of processing intermediate nickel bearing products, the method comprising subjecting the intermediate nickel bearing products to an acid leach in order to dissolve substantially all of the...
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5207995 |
Recovery of cerium from fluoride-containing ores
Recovery of cerium values from fluoride-containing ores such as bastnasite is enhanced. The ore is ground, roasted, and leached with dilute hydrochloric acid to produce an ore concentrate. The...
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5181956 |
Method for purifying TiO.sub.2 ore
Process for beneficiating titanium bearing ore selected from the group consisting essentially of titaniferous ores, leucoxene, rutile, perovskite, and sphene comprising: (a) contacting said ore...
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5158603 |
Process of extracting anions with quaternary amines
An improved extraction system employing a quaternary amine to extract anions from an aqueous solution, particularly precious metals such as gold or silver from an aqueous alkaline solution. The...
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5127942 |
Microbial consortium treatment of refractory precious metal ores
A method is provided for the recovery of precious metals, such as gold and silver, from refractory carbonaceous sulfidic material. The carbonaceous sulfidic material is ground and placed in heaps...
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5102512 |
Process for extracting and purifying gallium from bayer liquors
A process for extracting and purifying the gallium contained in an industrial solution of sodium aluminate by fixing the gallium on a stationary phase constituted by porous polystyrene adsorbent...
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5082493 |
Processing of carbon steel furnace dusts
In a process for the hydrometallurgical treatment of electric arc furnace dusts which includes an acetic acid leach, the acetic acid solution used to perform the leach is made strong enough to...
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5068094 |
Process for the removal of cadmium ions from phosphoric acid resulting from a wet process
A process for the removal of cadmium ions by liquid-liquid extraction from wet process phosphoric acid, which had been obtained from crude phosphate ores by dissolution with sulfuric acid, uses...
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5028385 |
Treatment of metals for coating or activation
Coating with high-melting metals can be simplified by alloying high-melting metal with sufficient aluminum to make low-melting alloy that is applied, bonded in place, and then subjected to the...
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5017346 |
Process for treating zinc oxide bearing materials
A process of refining zinc oxide from roasted zinc sulphide bearing concentrates comprises leaching the concentrate in an aqueous sulphur dioxide solution under controlled conditions providing...
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5011665 |
Nonpolluting recovery of rare earth values from rare earth minerals/ores
Rare earth values are nonpollutingly recovered from a rare earth mineral/ore, especially one containing but minor amounts of the rare earths, by (a) leaching/decomposing such rare earth mineral/ore...
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5007960 |
Method for removing chromium from chromium containing waste material
A method is provided for removing chromium from a chromium containing waste material wherein the waste material is dried by indirect heating, sized to a particle size of less than 0.105 mm, mixed...
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5007620 |
Apparatus for biological processing of metal-containing ores
An apparatus for use in bioleach processing of metal-bearing solids is disclosed. The apparatus includes a containment means adapted for containing a slurry made up of metal-bearing solids, a...
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4999171 |
Process for recovery of gallium by chelate resin
A process for recovery of gallium from aqueous solution containing gallium by adsorbing gallium to a chelate resin is disclosed. According to this process, the aqueous solution containing gallium...
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4988487 |
Process for recovering metal values such as scandium, iron and manganese from an industrial waste sludge
A process for eliminating an industrial waste sludge by converting its metal values into useful products involves the selective leaching of Mn, divalent Fe, and other valuable metals, such as Sc,...
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4979987 |
Precious metals recovery from refractory carbonate ores
Precious metal values, particularly gold and silver, are liberated from refractory, carbonate ores by adjusting the molar ratio of sulfide to total acid consumers to between about 1.2 and about 3.2...
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