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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...
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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...
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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...
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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...
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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...
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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...
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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...
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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.
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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...
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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,...
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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...
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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...
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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...
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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 ...
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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...
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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...
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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...
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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...
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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...
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JP7456762B2 |
To provide a rotary hearth furnace capable of improving the productivity of products.A rotary hearth furnace comprises an annular furnace body 11 having a burner, a rotary hearth 12 rotating the inside of the furnace body 11 and an exhau...
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JP7441237B2 |
A method of the invention for treatment of particulate material for metal recovery includes heating a furnace to a first temperature, feeding a particulate material into the furnace, and before or after heating of the raw material, feedi...
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JP2024019771A |
[Problem] When dust containing zinc is heated in a rotary kiln to gasify and recover the zinc contained in the dust, the combustible gas generated from the dust can be easily removed without using large equipment, and the zinc contained ...
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JP2024013693A |
[Problem] CaMnO3A method for recovering precious metals from a material to be treated using a perovskite oxide as a recovery agent is provided, which is applicable to industrial implementation. The present invention relates to a method f...
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JP7424598B2 |
To provide a method for preventing the elution of heavy metals in seabed ore, in the atmosphere.The method for preventing the elution of heavy metals in seabed ore, in the atmosphere, according to the present invention includes a step of...
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JP7419514B2 |
The present invention refers to an improved process for recovering zinc from primary and secondary raw materials, said process comprising a first leaching step wherein the ratio between the zinc weight contained in the raw material and t...
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JP7415629B2 |
To provide a method of manufacturing zinc oxide ore capable of retaining a chlorine grade in a crude zinc oxide cake low by heightening a chlorine removal rate while suppressing usage of sodium carbonate in a wet process.A method of manu...
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JP7400401B2 |
To produce a high-quality zinc oxide ore whose fluorine concentration is sufficiently reduced while restraining the heat load to a drying/heating furnace by a high temperature operation in a process of producing the zinc oxide ore from a...
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JP7396340B2 |
To provide a zinc separation method enabling zinc to be easily separated from an iron-making dust, at low cost, a zinc material production method and an iron material production method.A zinc separation method comprises: a wet classifica...
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JP2023551442A |
Improved processes and systems for producing renewable hydrogen suitable for reducing metal ores and for producing activated carbon are disclosed. Some variations include pyrolyzing biomass to produce carbon-containing biological reagent...
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JP2023551443A |
Improved processes and systems for producing renewable hydrogen suitable for reducing metal ores and for producing activated carbon are disclosed. Some variations include pyrolyzing biomass to produce carbon-containing biological reagent...
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JP7392538B2 |
The present invention provides a method for treating an alloy, wherein nickel and/or cobalt is obtained by separating copper and zinc from an alloy that contains copper, zinc, and nickel and/or cobalt. The present invention is a method f...
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JP7392539B2 |
Provided is an alloy treatment method comprising separating copper and zinc from an alloy containing nickel and/or cobalt and also containing copper and zinc to obtain nickel and/or cobalt selectively. An alloy treatment method is provid...
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JP2023550618A |
Improved processes and systems for producing renewable hydrogen suitable for reducing metal ores and for producing activated carbon are disclosed. Some variations include pyrolyzing biomass to produce carbon-containing biological reagent...
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JP2023549557A |
The present invention is a method for converting metal oxides into metal M.1To provide a system and method for reducing [Selection diagram] Figure 1
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JP2023167518A |
To suppress variation of the mercury concentration of slurry obtained by an exhaust gas treatment process in a method for producing crude zinc oxide sintered ore.A method for producing crude zinc oxide sintered ore comprises: a reduction...
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JP7380280B2 |
To provide a grizzly bar which can be used in the situation that where constant collisions with a high-temperature block object and so on under, for example, high temperature environment of 700°C or more, of which not only a top surface...
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JP2023547502A |
The present invention is a method for processing hard metals, more particularly hard metal scraps, in which the hard metals are combined with low melting point alloyed metals in a reaction chamber of a reactor (10) while heat is applied....
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JP2023161901A |
To improve productivity of coarse zinc oxide burnt ore by reducing a carry-over of an input in a dry heating process, in manufacture of the coarse zinc oxide burnt ore where fine powder of the coarse zinc oxide is used as an additional r...
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JP2023542549A |
Some variations are compositions for reducing metal ores, wherein the composition comprises carbon metal ore particulates, and the carbon metal ore particulates have a carbon metal ore particulate content of at least about 0.1 on an anhy...
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JP2023542551A |
Some variations are compositions for reducing metal ores, wherein the composition comprises carbon metal ore particulates, and the carbon metal ore particulates have a carbon metal ore particulate content of at least about 0.1 on an anhy...
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JP2023542552A |
Some variations are compositions for reducing metal ores, wherein the composition comprises carbon metal ore particulates, and the carbon metal ore particulates have a carbon metal ore particulate content of at least about 0.1 on an anhy...
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JP2023138482A |
To provide a method for recycling metals from porous materials comprising metals.A method comprises: (1) at least one step of heat treatment of a porous material A which comprises at least one mineral oxide and has a sulphur content of 2...
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JP7351180B2 |
To provide technical means, which is means for adjusting a distribution breadth of a drop position of a discharged matter from a discharge port of a rotary kiln, capable of being easily applied to an existing rotary kiln and implemented ...
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JP2023540603A |
A method for producing valuable products from industrial dust is described. The method includes: i) providing an industrial dust having a first concentration of at least one valuable substance and a volatile component to a heating device...
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JP7341570B2 |
The invention relates to a method for producing copper metal from copper concentrates without generating waste, which comprises: (a) oxidizing copper concentrate; (b) cleaning and cooling the gases; (c) feeding to a reduction reactor; (d...
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JP2023536281A |
A method of processing a pyrite-containing slurry is disclosed. The method includes removing pyrite from a pyrite-bearing slurry and forming (i) an inert stream and (ii) a pyrite-bearing material, the pyrite-bearing slurry from a tailing...
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JP2023536274A |
Metals such as copper or nickel or zinc or cobalt from metal sulfide-containing materials in mining materials where it would be "uneconomical" to recover the metal using conventional recovery options prior to the invention. A method for ...
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JP2023103823A |
To provide a method for manufacturing a crude zinc oxide using steel dust as a raw material which can effectively utilize flue cinder containing zinc and copper produced in a copper refining furnace as a part of a raw material, while avo...
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JP2023103824A |
To provide a method for producing a dried product or a fired product, in a process executed using a rotary kiln provided with a burner for heating using heavy oil or the like as a fuel and a rotary heating furnace body driven by electric...
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JP7307298B2 |
A production device, method and application of nano-sized zinc molybdate. The device includes a double-cone mixer; an elevator is obliquely provided at a bottom of a discharge port of the double-cone mixer; a rear end of the elevator is ...
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