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WO/1994/017216A1 |
A continuous hydrometallurgical process for conversion of ore derived copper and/or zinc sulfides into recoverable water soluble sulfates is provided. The process comprises: i) contacting the ore derived copper and/or zinc sulfides with ...
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WO/1994/009166A1 |
A method for oxidizing treatment of molten matte and at the same time directly smelting sulphidic concentrate in a refractory-lined liquid bath reactor, e.g. a converter, into which oxidizing air is introduced below the surface of the li...
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WO/1994/008058A1 |
Zincky powder generated during the manufacture of steel is lixiviated in an alkaline solution to produce an alkaline zincky solution and an iron residue for separation. This solution is neutralized with acid to give a zincky precipitate ...
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WO/1994/000607A1 |
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 pressure to obtain a resulting acidic leach li...
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WO/1994/000606A1 |
A process for producing one or more metals from a mineral feedstock (12) is defined. The mineral is fed to a leaching apparatus (10) wherein it is contacted with electrolyte (14). The leaching apparatus has zones of decreasing oxidation ...
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WO/1993/024665A1 |
A method is disclosed for melting copper without incorporating unwanted oxygen and/or hydrogen into the copper by effectively controlling the burners (16) used to melt the copper within desired fuel/air ratio operating limits by employin...
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WO/1993/024666A1 |
Copper and/or nickel sulphide ore concentrates of high intrinsic energy value are oxygen smelted by introducing such concentrates via feeds (32) into a closed loop extraction circuit in which a molten sulphide carrier composition is forc...
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WO/1993/023579A1 |
Process and device for the separation of reusable metal constituents from a composite material, especially a laminated plastic-metal. The invention is characterized by a device for carrying out this process according to any one of claims...
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WO/1993/016204A2 |
Nickel and/or copper cations can be extracted, from their aqueous solutions also containing chelating agents, by liquid-liquid extraction with an organic solvent containing suitable complexing extractants for the nickel and/or copper. Ho...
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WO/1993/008310A1 |
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 order to dissolve the desired metals; b) ...
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WO/1993/006952A2 |
Heavy metals are efficiently removed from contaminated soil by a process which comprises leaching or washing the soil with a mild leachant solution comprised of an aqueous solution of an acid and a salt. Heavy metals are also efficiently...
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WO/1993/004208A1 |
An improved method for the recovery of copper from a copper sulfide concentrate, chalcocite, comprising partially leaching the chalcocite concentrate with an aqueous ammoniacal solution, such as ammonia and ammonium sulfate, with no subs...
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WO/1993/002219A1 |
A process for purifying the raw material of copper or its alloy containing at least one element selected among Pb, Ni, Sb, S, Bi and As, and further, under certain circumstances, at least one element selected among Sn, Fe and Zn as impur...
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WO/1993/001135A1 |
Apparatus is suitable mainly as part of the technologic line for purification of waste water containing dissolved metal forms or for the use in the hydrometalurgy. It consists of the fluid reactor (1) filled with a charge (11) of metal p...
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WO/1992/022673A1 |
The invention relates to a process for the treatment of complex metal sulphide materials and for the recovery of metal values from such materials. The process is characterized by first subjecting the material to a leaching process under ...
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WO/1992/017614A1 |
A method for ion flotation of copper ions uses as the flotation reagent a cationic surfactant of formula (I), wherein R?1� is a C�10?-C�18? alkyl group, R?3� is a lower alkyl group, or benzene ring optionally substituted with one...
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WO/1992/009370A1 |
Equipment scrap (S), for example electronic and electric appliances, components, cables, etc. is alternatively mechanically ground (1, 3), magnetically separated (2) and mechanically-physically separated (5, 10-12), for example by means ...
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WO/1992/008812A1 |
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 sites on activated carbon, adsorbing the me...
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WO/1992/006227A1 |
A process and device are disclosed for regenerating and recovering metals from chloride-containing solutions, such as those resulting from etching, corroding and rinsing during surface treatments, in particular galvanoplastic treatments ...
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WO/1992/001074A1 |
The noxious fumes leaving the dry hearth chamber (112) of a metal recovery furnace (102) are fed to an incinerator (106) where they are burnt at high temperature with oxygen. The hot, clean exhaust gas is introduced to the bath chamber (...
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WO/1991/009146A1 |
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 residual acid and reducing ferric iron in...
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WO/1991/003575A1 |
A smelting reactor (10) which includes a central internal carburization/combustion plenum or chamber (16) in which hot metal is carburized by the injection of coal fines and heated by post combustion of the coal gases. The chamber (16) h...
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WO/1990/002909A1 |
Burners with a flame observation mixer (71, 72) providing substantially complete combustion and a uniform flame composition using a wide variety of fuels including low pressure gaseous and liquid fuels and a method for using these burner...
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WO/1989/010791A1 |
A new depressant for use in enhanced separation of polymetallic sulphides is described. The depressant agent is used in conjunction with convention collector agents and frothing agents in the flotation separation of copper, nickel, lead,...
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WO/1989/009289A1 |
The invention relates to a process for recovering non-ferrous metal values such as nickel, cobalt, copper, zinc, manganese and magnesium from material containing said metals, by converting the non-ferrous metal values into sulphates by u...
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WO/1989/003434A1 |
Compositions comprising carbon-based supports and containing heteropolycyclic compounds such as bipyridyl, phenanthroline or derivatives thereof are used in separation of dissolved late transition metals such as Fe, Co, Ni and Cu from so...
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WO/1989/001530A1 |
The present invention relates to a method for monitoring and control of smeltmetallurgical processes, endothermic as well as exothermic ones, preferably pyrometallurgical processes, by means of optical spectrometry, whereby one first det...
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WO/1988/007591A1 |
A method for concentrating oxidized copper ore comprises preparation of the pulp, introduction of an ionized sulphide therein and flotation. Before flotation, the pulp and/or water solution of the ionized sulphide is subjected to electro...
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WO/1988/002408A1 |
The method provides for preparation of a pulp, its sulphidizing and floatation. The sulphidizing of the pulp is effected with melted sulphur at a temperature of 115-180�C and at a pressure of 1.5-10 atm in the presence of sodium sulpha...
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WO/1988/000248A1 |
Process for separation of a metal or mineral value from a base material in which 30 to 70 % of a particulate hydrophobic material is slurried under conditions of shear with a hydrophobic liquid. After a pre-determined time, the remainder...
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WO/1987/002273A1 |
Process for the selective recovery of copper from an aqueous metal containing solution in which (a) the solution at a pH of 7 or less is contacted with a chelate exchange resin to selectively remove a substantial proportion or all of the...
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WO/1987/002068A1 |
The mixture of sulfides is chemically attacked with an aqueous oxidizing solution of fluosilicic acid for dissolving the metals present. From said solution, the lead, and optionally the silver, is reprecipitated to the state of sulfates ...
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WO/1987/001138A1 |
A grain refinement method for copper-based metals, which method can be applied to a range of different types of such metals. In accordance with the method, one arranges that a melt of the metal to be grain refined contains each of the fo...
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WO/1986/006361A1 |
Preparation of metal carbides, nitrides, borides, silicides and phosphides, also metal alloys and pure metals, by providing a precursor in which there are organic ligands bonded to the metal or metals, such precursor having the element X...
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WO/1986/005211A1 |
A method for working-up valuable metal-bearing waste products, particularly but not exclusively copper scrap, containing a substantial amount of organic constituents, to a product form suitable for recovering the valuable-metal content, ...
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WO/1986/002949A1 |
The refining agent is a granular alloy of a metal selected in the group of alkaline-earth metals and zinc with a metal element in small proportions susceptible of providing the alloy with a substantially lower melting point. The alloy ma...
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WO/1986/000031A1 |
A method of separating metal particles where particles of the one metal exhibit a higher degree of friction against a surface than particles of the other metal, particularly for separating lead particles and copper particles one from the...
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WO/1985/004190A1 |
A circumferential sealing assembly for use with a generally cylindrical, rotatable liquid metal reaction vessel (1) and a hood (14) which is provided to collect hot gases from the reaction vessel (1). The sealing assembly comprises a cab...
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WO/1985/003952A1 |
This is a method for the complete leaching of the valuable metals in a metal sulphide material which contains copper, zinc, lead, silver and iron by the use of a solution which essentially contains cupric chloride/sulphates. After the va...
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WO/1985/002204A1 |
Lead constituents may be removed from a dross to produce a copper matte low in lead assay by melting the dross at temperature in excess of 900oC, allowing the molten dross to separate into a lead bullion layer and a matte layer, removing...
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WO/1985/001670A1 |
Processes for treating aqueous streams, such as waste streams and metal ion containing streams by utilizing reverse osmosis and electrodialytic water splitting. The processes use a minimum of treatment water, recovers chemical reagents a...
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WO/1985/001748A1 |
Nickel and cobalt is leached selectively from a copper-nickel-cobalt sulphide concentrate by the use of chlorine gas and oxygen gas (air) at 130oC - 160oC in an autoclave. A good separation is achieved between nickel and cobalt which goe...
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WO/1984/004259A1 |
Gold ore, or any other mineral treated to have a lyophilic surface, (e.g. chalcopyrites), is ground into a slurry in crusher (1), powdered coal and oil are added at location (2), and the mix is conveyed to a contact zone (3), where any m...
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WO/1984/003307A1 |
Method for electrolytically refining copper involving precise control of the thiourea concentrations in the copper sulfate, sulfuric acid solution used in the refining whereby improvements are obtained in tankhouse current efficiencies a...
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WO/1984/002148A1 |
A process for recovering precious metals from an alkaline cyanide process liquor containing a base metal component. The liquor is treated with precipitant for at least one base metal of said component, the precipitant being selected from...
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WO/1983/002956A1 |
Substantially completely deoxidized, consolidated dispersion-strengthened copper stock of sizable cross-section and particulates capable of being thus consolidated into such stock are shown. The stock exhibits ductility substantially gre...
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WO/1982/001895A1 |
An improved method for recovery of metal, particularly aluminum, from metal bearing dross (14) utilizes a trough (43) for collection of the dross (14). A wedge member (28) compresses the dross (14) in the trough (43). In this manner, met...
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WO/1982/001725A1 |
A method of recovering copper and nickel from sulphidic minerals containing copper, nickel and iron comprises the steps of roasting the mineral, preferably to provide magnetite; sulphating, for example with sulphuric acid, sulphur trioxi...
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WO/1982/001197A1 |
Process for producing cuprous chloride from chalcopyrite by means of a cupric chloride leach utilizing particular processing conditions in order to obtain relatively high cuprous chloride concentrations. The processing conditions are mai...
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WO/1981/001420A1 |
A process for recovering non-ferrous metal values from their ores, minerals, concentrates, oxidic roasting products, or slags by sulphating said starting material using a mixture comprising iron(III) sulphate and alkali metal- or ammoniu...
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