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WO/2014/000021A1 |
In accordance with the present invention there is provided a method for leaching zinc from an ore, the method comprising the method steps of: curing the zinc silicate ore to be leached through the application of an aqueous solution of a ...
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WO/2013/166789A1 |
Disclosed are a cadmium removing process in zinc-containing solution purification with better cadmium removing effect and a purification method of zinc-containing solution with desired purification effect. The cadmium removing process in...
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WO/2013/156832A1 |
There is described a method for treating slag produced by metallurgical processes, in particular the waelz process, aimed to recover non-ferrous metals such as lead and zinc contained in such slag in the form of oxides. The method provid...
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WO/2013/120132A1 |
A process for recovering zinc oxide from a zinc ore, the process including the steps of: leaching the zinc ore with an alkaline lixiviant comprising an aqueous mixture of NH3 and NH4Cl, or ionic equivalent, having a NH4Cl concentration o...
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WO/2013/108645A1 |
The purpose of the present invention is to provide: a hydrogen sulfide gas production plant capable of recovering discharged waste hydrogen sulfide gas and efficiently supplying same to a treatment plant that performs treatment by using ...
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WO/2013/104045A1 |
A method for selectively processing a polymetallic oxide solution containing a plurality of base metals comprising at least one of: Cu, Co, Ni, Zn associated with iron, comprising acid leaching the solution; recovering a filtered leachat...
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WO/2013/076812A1 |
The present invention provides a method for producing a solution that contains nickel and cobalt with high purity by more efficiently and easily separating nickel and cobalt from a positive electrode material of a used nickel hydrogen ba...
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WO/2013/068645A1 |
A method for leaching a sulfidic metal concentrate in hydrometallurgical production of metal in a leaching process from which hot water vapor containing off-gas is conducted out and to which an acid solution warmed up to an elevated temp...
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WO/2013/056348A1 |
A process and an apparatus are disclosed for improved recovery of metal from hot and cold dross, wherein a dross-treating furnace is provided with a filling material with good capacity to store heat. This filling material is preheated to...
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WO/2013/036268A1 |
A process for separating zinc from a feedstock containing a mixture of metals and metal compounds. The process includes leaching a zinc -containing feedstock with a concentrated basic solution, optionally diluting the slurry with an amou...
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WO/2013/034049A1 |
Disclosed is a comprehensive recovery method for a complex material containing arsenic and valuable metal slags, comprising passing the materials containing arsenic through a primary rotating kiln to volatilize the arsenic, and through a...
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WO/2013/009630A1 |
An apparatus for condensing metal vapors has at least one inlet conduit that is cooled to cause a portion of the metal vapor to condense to liquid. The apparatus also has a holding tank that is connected to the inlet conduit that collect...
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WO/2012/150984A2 |
Provided are methods using a ketoxime in metal extraction. One aspect of the invention relates to a method for the recovery of metal from a metal-containing aqueous solution at an elevated temperature using a ketoxime. Another aspect rel...
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WO/2012/140284A1 |
The invention relates to a method wherein the zinc concentrate is subjected to the following steps: a. roasting at least one part of the zinc concentrate; b. neutral leaching, wherein the zinc oxide is dissolved; c. acid leaching, wherei...
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WO/2012/103571A1 |
A method of precipitating a zinc containing solid from an acidic solution containing dissolved zinc and magnesium comprising contacting the solution with a calcium containing neutralising agent to raise the pH of the solution to 4.5 to 7...
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WO/2012/073712A1 |
[Problem] To provide a method and device for supplying, at a controlled supply speed, zinc gas which is overheated to above the boiling point of zinc. [Solution] The method for supplying zinc gas according to the present invention compri...
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WO/2012/068621A1 |
A process for recovering zinc from a zinc containing material, the process including the steps of: leaching the zinc containing material with an alkaline lixiviant which includes an ammonium species, a hydroxide species and a halide spec...
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WO/2012/068620A1 |
A process for recovering zinc from a zinc containing material, the process including the steps of: leaching the zinc containing material with an alkaline lixiviant comprising an aqueous mixture of NH3 and NH4CI, or ionic equivalent, havi...
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WO/2012/040829A1 |
Zinc and lead are usually concomitantly present in Zn-Pb ores and tailings. A novel non-polluting hydrometallurgical process for selectively leaching and recovering zinc (Zn) from a composite lead (Pb) and zinc sulphide containing minera...
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WO/2012/024124A2 |
A process for treating spent catalyst containing heavy metals, e.g., Group VIB metals and Group VIII metals is provided. In one embodiment after deoiling, the spent catalyst is treated with an ammonia leach solution under conditions suff...
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WO/2011/141036A1 |
The invention relates to a method for reprocessing steel scrap, wherein the steel scrap is preheated with the aid of exhaust gases arising in a melting furnace. In order to prevent dioxins, furans, or other problematic organic substances...
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WO/2011/135991A1 |
Disclosed is a valuable metal recovery method that has excellent valuable metal selectivity and recovery efficiency, and furthermore is capable of reusing materials that were used in the recovery of a valuable metal. The valuable metal r...
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WO/2011/122983A1 |
The invention concerns a method for extracting brass, zinc oxide and copper oxide from brass foundry slag by crushing the slag, mechanically purifying same and extracting a brass oxide film, which includes preparing a solution containing...
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WO/2011/122984A1 |
The invention relates to a facility for extracting brass, zinc oxide and copper oxide from brass foundry slag. The facility includes a slag preparation section comprising a furnace, a crusher, a magnetic separator, a vibrating screen and...
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WO/2011/122985A1 |
A line for extraction of brass, zinc oxide and copper oxide from brass slags relates to the field of non-ferrous hydrometallurgy, and may be used for the selective extraction from brass casting production wastes of brass, zinc oxide, cop...
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WO/2011/113997A1 |
The invention relates to a method and a reactor for purifying solid matter from the process solution (2) in the fluidized bed in the reactor, into which the process solution is fed to form the fluidized bed (4) in the essentially cylindr...
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WO/2011/106012A1 |
Presented is a method and apparatus for treating an exhaust gas. A series of filters and conditioning units are used to separate and extract various substances from the exhaust gas, typically originating from an industrial process. In an...
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WO/2011/076995A1 |
The invention relates to a method for treating the leaching residue containing iron and sulphur that is generated in the leaching of a sulphidic non-ferrous metal concentrate. The sulphur-containing leaching residue or part of it is rout...
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WO/2011/069221A1 |
Physical-chemical process intended for the treatment of steel industry residues of electric arc furnaces (EAF), known as "aciary powder", for the recovery of zinc, iron and other metals of interest contained therein through obtaining sol...
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WO/2011/061408A1 |
The invention relates to a method for removing chloride from zinc sulphate solution in conjunction with zinc production. According to the method, the chloride is removed from solution by means of monovalent copper, which is produced in a...
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WO/2011/051674A2 |
The present invention concerns the condensing of vapour phase compounds or elements, typically metals such as magnesium, obtained by reduction processes. These include metallothermic and carbothermic processes. There is described a metho...
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WO/2011/040344A1 |
Disclosed is a method for producing briquettes, by which briquettes having enhanced strength can be produced even when the amount of a binder used therefor is reduced as much as possible. Specifically disclosed is a method for producing ...
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WO/2011/038746A1 |
The invention relates to a method for dezincifying zinced steel scrap, wherein the zinced steel scrap is brought into contact with an acidic solution, which is already pre-loaded with zinc ions. It has been shown that a significant accel...
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WO/2011/024244A1 |
Disclosed is a dezincing apparatus which comprises an induction heating vessel (50) that has an introduction opening for introducing steel sheet scraps (41) and is the outer vessel of the dezincing apparatus (2), induction heating coils ...
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WO/2011/020181A1 |
Calcium (Ca), manganese (Mn) and magnesium (Mg) carbonate plus lead (Pb) and zinc (Zn) sulphide minerals in a permeable host, crushed ore, concentrates or as mine discharge tailing are selectively solution mined (in-situ or ex-situ) with...
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WO/2011/016415A1 |
Disclosed is a liquid supply apparatus wherein the inner diameter (D2) of an outflow nozzle (14, 114) is set to a size which allows molten liquid (M) accommodated in a liquid storage container (10, 100, 200) to flow out under the weight ...
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WO/2010/150873A1 |
Disclosed is a method for efficiently and economically separating and recovering elements, such as copper, that coexist in scrap iron, wherein scrap iron is melted and the molten product of scrap iron obtained is brought into contact wit...
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WO/2010/143623A1 |
A method for water and metal recovery from a plating wastewater resulting from washing is disclosed with which water and metals are efficiently recovered from the plating wastewater, the method comprising an iron insolubilization step in...
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WO/2010/108212A1 |
A method for leaching zinc from a zinc-bearing carbonate ore, the method comprising the steps of: subjecting the zinc-bearing carbonate ore to elevated temperatures of between about 300°C and about 900°C thereby producing a roasted ore...
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WO/2010/086407A1 |
The invention relates to a method for treating alkaline and saline batteries including mechanically grinding said batteries to obtain a battery homogenate, at least one separation making it possible to isolate the black mass, acid leachi...
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WO/2010/082065A2 |
A process for recovering a metal chloride or mixed metal chloride from a solid waste material comprising recoverable metal containing constituents produced by lead, copper or zinc smelting and refining processes, said process comprising ...
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WO/2010/072773A1 |
The present invention relates to a method for eliminating halides, in particular chlorides and fluorides, from secondary zinc oxides, for example Waelz or Primus oxides, including the steps of (1) stripping the secondary zinc oxides with...
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WO/2010/074180A1 |
Disclosed is a method for manufacturing highly pure polycrystalline silicon by reducing chlorosilane with metallic zinc whereby a large amount of polycrystalline silicon can be produced continuously and stably while zinc chloride is proc...
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WO/2010/071932A1 |
A method for extracting zinc from an aqueous ammoniacal zinc solution containing impurities, the method comprising the steps of: (i) contacting the aqueous ammoniacal zinc solution containing impurities with an organic phase comprising a...
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WO/2010/064143A2 |
The present disclosure is directed towards systems and methods for the treatment of wastewater. A system in accordance with one particular embodiment may include a vacuum filter band system configured to receive a saturated ion exchange ...
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WO/2010/037169A1 |
This invention relates to a process for extraction of mined material including the steps of draining liquid from the mined material, and adding metal-binding particles to the drained liquid. The process is particularly well adapted for e...
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WO/2010/034465A1 |
The invention relates to a method for the selective acidic dezincification of steel scrap. The selective complete dezincification is achieved by adding oils, wherein the dissolution of iron by the autogenous inhibitory action of the oils...
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WO/2010/023691A1 |
This invention relates to an improved method for processing high zinc iron ores for production of iron and steel comprising the steps of; producing agglomerate comprising a mixture of iron oxides, carbonaceous materials, and fluxes with ...
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WO/2010/019062A1 |
According to this invention, a process for obtaining zinc, lead, gold and silver concentrate from a complex low - concentration ore. The process consists of several stages: three - staged basic grinding and two - staged classification, c...
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WO/2010/016020A2 |
A method of production of Zinc dust, which includes melting Zinc products in a melting furnace on a semi-continuous basis, transferring at least a part of the molten Zinc products to a vaporizing furnace, vaporizing the molten Zinc in th...
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