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Matches 301 - 350 out of 2,562

Document Document Title
WO/1994/021830A1
A process for recovering zinc and iron from zinc- and iron-containing sulphidic material, which also contains lead and silver, in which the sulphidic material is leached under oxidizing conditions in a series of leach steps to produce a ...  
WO/1994/021832A1
Zinc is recovered from zinc sulphide material by introducing such material at a feed station (42) into a molten copper sulphide matte which is circulated in a closed loop path through said feed station (42), a zinc recovery station (16) ...  
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 ...  
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...  
JP5948637B2  
JP5939910B2  
JP5935098B2  
JP2016516894A
The present invention relates to the method and constituent which improve processing of mineral Tailing . A method includes making sub Flow shunt from the initiative pipe of a Tailing process flow. Additive agents, such as pure polymer w...  
JP5924575B2  
JP2016089196A
[Subject] A valuable metal recovery method and a valuable metal recovering system which can collect valuable metal, such as gold in waste, efficiently are provided. [Means for Solution] While sorting out the Mill The stone containing the...  
JP5920720B2  
JP2016069706A
[Subject] A way metal which makes it possible to collect valuable metal from a scrap efficiently oozes, and a recovery method of metal using it are provided. [Means for Solution] (1) In a method of making a plurality of metal oozing on t...  
JP5909189B2  
JP2016054736A
[Subject] A method of carrying out living thing exudation of the metal efficiently from used electronic equipment part articles, such as a waste electronic board, is provided. [Means for Solution] The Sulfo bacillus thermos bottle Rufido...  
JP5904089B2  
JP5904073B2  
JP2016044987A
[Subject] A disposal method of a radioactive cesium contaminant which obtains a charge of a radiation shielding material is provided at the same time it improves a rate of reduction-izing of a substance containing radioactive cesium. [Me...  
JP5893145B2  
JP2016035090A
To provide a novel metal recovery method that is convenient, requires lower costs and has excellent selectivity, and a metal recovery agent for use therein.The present invention provides a process for the separation precipitation/recover...  
JP5881885B1
[Subject] Especially the present invention pays its attention to reduction processing gas containing zinc steam which occurs when manufacturing reduced iron from electric furnace dust containing iron oxide and a zinc oxide on the occasio...  

Matches 301 - 350 out of 2,562