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Matches 301 - 350 out of 2,542

Document Document Title
WO/1994/008057A1
A method for the recovery of zinc oxide from industrial waste materials of various components, including zinc, lead, iron and cadmium, by roasting the waste material at an elevated temperature, treating the waste material with an ammoniu...  
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...  
JP2015232084A
【課題】容易に精製でき、金属を容易に且つ 効率良く回収できる金属捕集剤及びその製造 方法、並びに金属を容易に且つ効率良く回収 できる金属回収方法の提供。【解決手段...  
JP2015535886A
アルミナを調製するためのプロセスであって 、このプロセスが、アルミニウムイオン、マ グネシウムイオンを含む浸出液および固体を 得るために、アルミニウム含有材料をH...  
JP2015226860A
【課題】酸性坑廃水から、銅、亜鉛および鉄 を金属もしくはその化合物として回収する効 果的な方法を提供すること。【解決手段】銅 イオン、鉄イオンおよび亜鉛イオンを少...  
JP5832183B2  
JP5832184B2  
JP5820070B2  
JP2015206077A
【課題】廃乾電池から該廃乾電池に含まれる マンガン成分と亜鉛成分とを分離、回収する 方法、設備および回収物を提供する。【解決 手段】廃乾電池からマンガン乾電池およ...  
JP5813506B2  
JP2015202474A
【課題】燃焼排ガスから排ガス中のダストを 分離除去する燃焼排ガスの処理方法として、 乾式電気集塵装置を用いた簡易な設備による 燃焼排ガスの処理方法であって、高いダ...  
JP2015182071A
To provide a method that removes a metal from the metal-containing organic-solvent solution with high efficiency.A method for removing a metal in an organic-solvent solution comprises dissolving a polymer in the metal-containing organic-...  
JP2015178675A
To provide a metal collection method capable of reducing a use amount of a chelator.The metal collection method of the invention comprises: a composite forming step for forming a composite of a metal in a sample and chelator in a mixture...  
JP5786021B2  
JP2015527491A
本方法は、得られる最終的な酸性状態が鉄に とってジャロサイトとして沈殿するのに理想 的であるこのような方法での、鉄を含まない 溶液または低い鉄含有量の溶液の再循環...  
JP2015527492A
硫化物鉱石及び精鉱からの卑金属の回収方法 本発明は、卑金属を硫化物鉱石及び精鉱から 回収する新規な方法であって、卑金属の鉱石 を第二鉄塩と混合し、該混合物を加熱し...  
JP2015157992A
To provide a method of removing impurities in an organic solvent which enables efficient separation of the organic solvent and impurities.A method of removing impurities in an organic solvent includes a neutralization step of adding a ne...  
JP5770118B2  
JP2015148008A
To provide a recovery system of high purity indium by a molten salt refining electrolytic method of conductive ITO (InO-SnO) scrap which is a main material for liquid crystal.There is provided a recovery system of high purity indium incl...  
JP5764264B2  
JP5762335B2  

Matches 301 - 350 out of 2,542