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Patent Searching and Data


Matches 301 - 350 out of 2,475

Document Document Title
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...  
JP2014173140A
To provide a method for recycling converter dust, in which the converter dust, that is obtained by using zinc-containing dust as an iron source and generated by blowing, can be recovered easily and surely as a blast furnace raw material....  
JP2014173121A
To recover valuable metals contained in waste, e.g. municipal refuse incineration ash or sludge, at low costs.Dust containing valuable metals is recovered in a cement production process using a cooling tower 3 which cools the whole of a ...  
JP2014524519A  
JP2014173188A
To recover valuable metals contained in waste, e.g. municipal refuse incineration ash or sludge, at low costs.A method of recovering valuable metals from a cement production process using a cooling tower 3 for cooling the whole of combus...  
JP2014173109A
To provide an apparatus and a method which enable recovering and utilizing a zinc ingredient and coke powder contained in dust discharged from the cupola furnace body.A recovery apparatus includes: a first classifier which communicates w...  
JP2014162960A
To provide a zinc oxide ore production method which produces zinc oxide ore from halogen-containing ore, and can produce high-quality zinc oxide ore by maintaining a sufficiently desirable halogen removal rate while performing operation ...  
JP2014159631A
To provide a metal refining device capable of improving the refining efficiency of metal without accompanying the addition of equipment and the time for maintenance.The metal refining device comprises: a molten metal holding vessel (10) ...  
JP2014521831A  
JP5576901B2  
JP5576221B2  
JP5572928B2  
JP5571345B2  
JP5567564B2  
JP5565354B2  
JP5566562B2  
JP5563093B2  
JP5563763B2  
JP2014133925A
To prevent a reduction of production by suppressing a decrease in throughput in a dezincification plant at the start-up of the dezincification plant used in a dezincification step of nickel wet-refining, and to efficiently conduct filtra...  
JP5554481B2  
JP5554478B2  
JP5541736B2  
JP5540574B2  
JP5533076B2  
JP5512482B2  
JP5512771B2  
JP2014095132A
To provide a method for recovering rare metals which allows for utilizing input materials without waste, and regenerating the input materials easily so as to recycle, and to provide a device for recovering rare metals which can be easily...  
JP2014084509A
To provide a method in which additional cost is suppressed, halogen and cadmium included in crude zinc oxide can be efficiently removed in production of zinc oxide ore.A production method of zinc oxide ore includes: a wet process S20 in ...  
JP2014510841A  

Matches 301 - 350 out of 2,475