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Matches 351 - 400 out of 2,736

Document Document Title
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 ...  
WO/1994/005818A1
A process and condensing system (10) is provided for condensing zinc and other metal vapors from a gaseous stream. A duplex condensing bath is provided, having a bottom layer of molten zinc and a top layer comprising a liquid condensing ...  
WO/1994/002210A1
A method is described which allows two hazardous waste products, namely PVC and electric arc furnace dust, both of which have negative commercial value, to be combined to produce an iron oxide suitable for steel making, pure cadmium, lea...  
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 ...  
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...  
WO/1993/020898A1
The object of the invention is to provide a process and the corresponding industrial Plant(s) which make feasible the thermal treatment of Hazardous Waste of different nature and origin also mixed, excluding the release of harmful efflue...  
WO/1993/019213A1
The metallurgical-works dust is taken to a first furnace atmosphere, preferably at 1000 to 1100 °C. The dust pellet is kept with continuous agitation therein until especially chlorine, alkaline and lead compounds have virtually totally ...  
WO/1993/014030A1
A method for the recovery of zinc oxide from industrial waste materials of various components, including zinc, lead, iron and cadmium, comprising the steps of treating the waste material with an ammonium chloride solution maintained at a...  
WO/1993/011573A1
The invention relates to a method of processing used batteries, especially zinc-carbon and alkali-manganese batteries, in order to recover any usable or environmentally relevant substances, comprising the mechanical reduction of the init...  
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) ...  
WO/1992/008815A1
A process for the treatment of zinc sulfide or other zinc bearing feed materials in conjunction with an iron sulfide containing mineral or compound to effect a separation of zinc from iron by fuming of either zinc and sulphur vapour or z...  
WO/1992/006222A1
The invention relates to the field of metallurgy and to a method and a device for the extraction of zinc in solution in a liquid iron bath (2) held in a container (3), such as a crucible for the casting of foundry parts. It is characteri...  
WO1991009977A3  
WO/1991/009977A2
Zinc is recovered by melting in a furnace a mass containing oxides of zinc and iron, a slag-forming flux material and a carbonaceous material, the content of the carbonaceous material being selected to avoid excessive foaming. The zinc v...  
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...  
WO/1991/008317A1
Zinc may be recovered from zinc sulphide concentrates by establishing a molten slag bath at 1150 °C to 1300 °C containing ferrous and ferric oxides, dissolving zinc sulphide in the bath, oxidizing the zinc sulphide by reaction with the...  
WO/1991/007225A1
Metal vapour, for example zinc fume in the offgas of a smelting furnace, is captured by bringing the stream into direct contact with a fluidized bed of solid particles having a particulate loading of greater than 10 kg/m?3¿ and preferab...  
WO/1991/003424A1
A high temperature process for leaching selected metal compounds, such as gallium or germanium, from ores containing those selected metal compounds is disclosed. The method generally includes contacting metal-containing ores with an admi...  
WO/1991/002825A1
A process for absorbing zinc vapour in molten lead is characterized in that a gas containing zinc vapour is contacted with and then separated from a flowing stream of molten lead in a cyclone.  
WO/1990/013679A1
A process is described for the partial desulphurization roasting of a variety of zinc bearing sulphide ores or concentrates by adjusting the roaster temperature and residence time in the roaster thus providing an oxygen deficient atmosph...  
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,...  
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...  
WO/1988/001654A1
Lead-zinc complex sulphide ores or concentrates are treated by a process which comprises: a) adding the ore or concentrate to a bath of molten matte which is overlaid by a slag layer; b) agitating and heating the bath by submerged inject...  
WO/1987/003010A1
A furnace (10) and process for recovery of zinc from sulphide materials in which zinc sulphide material together with an oxidizing gas is introduced by lance (20) into a first (17) of two laterally adjacent zones (17, 18) formed by a gas...  
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 ...  
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...  
WO/1986/002107A1
Recovering zinc from zinc bearing ore or concentrate (1) in an electrolic cell (3) which includes a cathode (5) containing cathode compartment (16) and an anode (4) containing anode compartment (2). The cathode and anode compartments are...  
WO/1985/000385A1
A process for recovering metal values from a zinc-containing complex sulphide material comprising leaching the material in a first leaching stage with a controlled amount of an aqueous chloride lixiviant solution containing cupric chlori...  
WO/1982/000664A1
Method for selectively extracting germanium from an aqueous acid solution containing, in addition to germanium, at least another metal selected from the group comprising cadmium, zinc, cobalt, iron, arsenic, aluminium, gallium and nickel...  
WO/1981/003500A1
A process for the production of ferrous metals or alloys thereof in which Zn and other heavy metals are recovered from the iron-bearing flue dust and the iron dust residue is returned to the furnace. The iron bearing flue dust is first s...  
JP2019157214A
[Subject] The present invention should manufacture zinc oxide team ore which excels with high intensity what is depended on the conventional manufacturing process in quality stability. [Means for Solution] Temperature management is perfo...  
JP2019143172A
[Subject] A pressurization oxidization exudation method of metallic sulfide that a loss of the recovery object metal can be reduced is provided. [Means for Solution] A pressurization oxidization exudation method carries out continuous su...  
JP2019127982A
[Subject] Avoid a functional fall resulting from deposition of exhaust gas dust in a damper in exhaust-gas-treatment equipment which opens and closes a flue which transports exhaust gas by a butterfly damper. [Means for Solution] Valve e...  
JP2019521250A
[Subject] Provide the metal manufacture device by solar energy heat reduction. [Means for Solution] The device concerned contains a solar energy collection light-and-heat conversion system and a heat reduction system, and is the solar en...  
JP6547963B2  
JP2019119895A
【課題】スペシャルハイグレード相当の純度 を有する亜鉛地金を歩留まりよく安定して量 産することのできる亜鉛地金の製造方法を提 供する。【解決手段】電炉ダスト又は電...  
JP2019093372A
To provide a method for treatment of waste and the like including harmful organic halide and heavy metals, capable of inhibiting gas flue block.There is provided a method for treatment of the object to be treated including organic halide...  
JP2019085642A
To provide a manufacturing device and a manufacturing method, capable of providing a high purity non-metal product or other metal products by removing impurities from molten metal of non-iron metal or other metals containing impurities a...  
JP6516264B2  
JP6512354B2  
JP6511503B1
[Subject] Offer of disposal methods, such as waste containing a harmful organic halogenated compound and a heavy metal which make it possible to control a flue blockade. [Means for Solution] It is a disposal method of a processed materia...  
JP2019060019A
To provide a separation method of zinc capable of separating zinc from an iron-making dust at high recovery rate and good efficiency.There is provided a separation method of zinc including a zinc leaching process for leaching zinc contai...  
JP2019060018A
To provide a separation method of zinc capable of separating zinc from an iron-making dust at high recovery rate and good efficiency.There is provided a separation method of zinc including a zinc leaching process for leaching zinc contai...  
JP6493423B2  
JP2019035145A
To provide either metal of tin, silver, copper, zinc or indium or a tin alloy with a low α-ray release amount having an α-ray release amount of 0.002 cph/cmor less without increasing the α-ray release amount even by heating irrespecti...  
JP6468841B2  
JP6459860B2  
JP6447423B2  
JP2018202383A
To provide a method for removing Sb from an Sb-containing acidic solution and for recovering valuable metals while suppressing the cost.A method for removing Sb includes adding at least one of Fe, Snand Alto an Sb-containing acidic solut...  
JP2018178201A
To provide a method for separating copper or zinc from an object for an exudation treatment small in agent used amount and small in energy used amount.There is provided a method for separating copper or zinc from an object for an exudati...  

Matches 351 - 400 out of 2,736