WO1997020958A1 - Recuperation de cobalt a partir de scorie - Google Patents

Recuperation de cobalt a partir de scorie Download PDF

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Publication number
WO1997020958A1
WO1997020958A1 PCT/AU1996/000779 AU9600779W WO9720958A1 WO 1997020958 A1 WO1997020958 A1 WO 1997020958A1 AU 9600779 W AU9600779 W AU 9600779W WO 9720958 A1 WO9720958 A1 WO 9720958A1
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WO
WIPO (PCT)
Prior art keywords
slag
furnace
oxygen
fuel
free
Prior art date
Application number
PCT/AU1996/000779
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English (en)
Inventor
John Millice Floyd
Darren John Sutton
Edward Neil Mounsey
Gavin Peter Swayn
Original Assignee
Ausmelt Limited
Priority date (The priority date is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the date listed.)
Filing date
Publication date
Application filed by Ausmelt Limited filed Critical Ausmelt Limited
Priority to AU76865/96A priority Critical patent/AU702608B2/en
Publication of WO1997020958A1 publication Critical patent/WO1997020958A1/fr

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Classifications

    • C—CHEMISTRY; METALLURGY
    • C22—METALLURGY; FERROUS OR NON-FERROUS ALLOYS; TREATMENT OF ALLOYS OR NON-FERROUS METALS
    • C22B—PRODUCTION AND REFINING OF METALS; PRETREATMENT OF RAW MATERIALS
    • C22B5/00—General methods of reducing to metals
    • C22B5/02—Dry methods smelting of sulfides or formation of mattes
    • C22B5/10—Dry methods smelting of sulfides or formation of mattes by solid carbonaceous reducing agents
    • C—CHEMISTRY; METALLURGY
    • C22—METALLURGY; FERROUS OR NON-FERROUS ALLOYS; TREATMENT OF ALLOYS OR NON-FERROUS METALS
    • C22B—PRODUCTION AND REFINING OF METALS; PRETREATMENT OF RAW MATERIALS
    • C22B23/00—Obtaining nickel or cobalt
    • C22B23/02—Obtaining nickel or cobalt by dry processes
    • C—CHEMISTRY; METALLURGY
    • C22—METALLURGY; FERROUS OR NON-FERROUS ALLOYS; TREATMENT OF ALLOYS OR NON-FERROUS METALS
    • C22B—PRODUCTION AND REFINING OF METALS; PRETREATMENT OF RAW MATERIALS
    • C22B7/00—Working up raw materials other than ores, e.g. scrap, to produce non-ferrous metals and compounds thereof; Methods of a general interest or applied to the winning of more than two metals
    • C22B7/04—Working-up slag
    • Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
    • Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
    • Y02P—CLIMATE CHANGE MITIGATION TECHNOLOGIES IN THE PRODUCTION OR PROCESSING OF GOODS
    • Y02P10/00—Technologies related to metal processing
    • Y02P10/20—Recycling

Definitions

  • This invention relates to a process for the recovery of cobalt from cobalt containing slags.
  • Cobalt containing slags suitable for the recovery of cobalt metal usually have quite low levels of cobalt but relatively high levels of iron, and significant levels of other metals, all mostly present as solutions of oxides in iron-calcium-silicate slags.
  • the level of cobalt may be less than 1%, while the iron content may be up to 50% or higher.
  • Other metals which may be present include copper, nickel and bismuth.
  • Suitable slags for the recovery of cobalt, both for conventional processes and for the present invention include those from a converting furnace and/or an electric, reverberatory or flash furnace used to process nickel or copper concentrates or mattes.
  • CoO(s) + Fe(m) Co(m) + FeO(s) (3)
  • the low density of the coke causes it to float at the upper surface of the slag.
  • strongly reducing conditions prevail at the upper surface where the slag is in contact with the coke, and reduction by the overall reactions (1) and (2) occurs at that surface; with carbon monoxide being an intermediary in the overall reduction reactions (1) and (2).
  • the opportunity for reaction (3) is limited to contact between the slag and settling the droplets of iron metal, and surface to surface contact between the slag and the metal phase.
  • the present invention is directed to providing a process for the recovery of cobalt from slags.
  • the process of the invention at least in a preferred form, enables improved control over the iron content of metal produced.
  • cobalt is recovered from a molten slag having cobalt- and iron-containing constituents, using a top-submerged lancing injection furnace system.
  • the slag is smelted in a furnace of the system by: (i) charging carbon-containing reductant to the molten slag so as to generate a reducing region at or adjacent to a top surface of the slag; and (ii) injecting free-oxygen-containing gas and combustion fuel into the slag by a top-submerged lance of the furnace system to generate a combustion region between the top and a bottom surface of the slag.
  • the carbon-containing reductant can comprise any suitable carbon source. It may comprise a suitable fluid, carbon-containing material, such as fuel oil, natural gas, LPG and/or town gas. However, it preferably is a material containing free-carbon, such as coal or coke, in lump and/or particulate form. Coal is the most preferred reductant for use in the invention, as coal provides a significantly enhanced rate of reduction compared with other carbon-containing reductants.
  • the carbon-containing reductant When the carbon-containing reductant is fluid or of relatively fine particulate form, it can be injected, such as by at least one top-blowing lance, or at least one top submerged lance other than the lance or lances providing injected free-oxygen containing gas and fuel. Particularly in such case, reducing conditions can prevail over substantially the entire top surface of the slag, although the reducing region then will principally be located at the or each site of reductant injection.
  • the reductant is coal or coke, it preferably is in lump form and may simply be fed to the furnace system via a suitable feed chute or the like. Particularly in the latter case, the reductant will float on the top surface of the slag, tending to provide similar reducing conditions over that surface.
  • the slag present at the commencement of an operating cycle can comprise a heel of molten slag from a preceding cycle, or it can be provided from fresh particulate or molten slag feed material to be smelted.
  • the slag can be charged to the furnace of the system from another furnace, such as an electric furnace, a flash smelting furnace or a converter, in which it has been produced or melted.
  • the slag can be feed material which is charged to the furnace of the system in particulate and/or lump form and melted therein, using the or each lance providing free- oxygen containing gas to achieve combustion of the fuel supplied to the or each combustion zone.
  • the temperature of the slag during smelting preferably is from 1200°C to
  • the free-oxygen containing gas and fuel can be supplied throughout a cycle of operation, or they can be supplied intermittently as required.
  • the fuel can comprise at least one of a suitable fuel oil, natural gas, LPG, particulate coal and particulate coke.
  • the fuel and free-oxygen containing gas preferably pass through a respective passage of the or each lance. If necessary, the fuel is supplied with an entraining, inert carrier gas.
  • the free-oxygen containing gas and fuel are supplied such that, in the or each combustion region, substantially all free-oxygen is consumed in combustion of the fuel.
  • the free-oxygen-containing gas may be air, oxygen-enriched air, or any other suitable gas containing free-oxygen.
  • reaction (7) results in some re-oxidation of cobalt metal
  • the overall effect of reactions (5) to (7) is to ensure a greater retention of iron in the slag as oxide, relative to retention of cobalt in the slag.
  • oxidation reactions (6) and (7) are found to be able to be enhanced or retarded, relative to reaction (4), depending on the proximity of the lance tip and, hence, the combustion region to the interface between the slag and metal phase.
  • the oxidation reactions are enhanced by lowering the lance tip nearer to the interface, and retarded by raising the lance tip towards the upper surface of the slag.
  • an operator in addition to reactions (4) to (7) enhancing production of cobalt metal relative to iron metal at a given lance tip height within the slag, an operator is able to adjust the ratio of cobalt metal and iron metal by raising or lowering the lance as required to control the overall state of reduction reactions involved. The operator therefore is able to improve and control the level of reduction of cobalt and iron achieved, and thereby optimise the process for recovery of cobalt with a required iron content.
  • a cobalt containing slag for use in the invention typically will contain constituents of other metals, in addition to iron.
  • the other metals include nickel, copper and bismuth.
  • the non-ferrous metals will tend to be reduced along with cobalt and iron and, to the extent that this is the case, they generally also will report in the metal phase, such as is the case of nickel and copper.
  • some non-ferrous metals will report in the smelting off-gases from which they can be recovered, and bismuth is an example of such metal.
  • the process of the invention can be conducted as a continuous or a batch operation.
  • the process enables the relative rates of reactions (1) and (2) at the upper surface of the slag to be optimised by the choice of reductant, and also by adjustment of the level at which the tip of the or each lance provides top-submerged injection of free-oxygen containing gas.
  • selection of the lance tip level allows the production of cobalt metal with a controlled level of iron metal.
  • a continuous operation there typically is a continuous feed to the furnace system of slag to be smelted, reductant and free-oxygen containing gas, while there also may be continuous or intermittent supply of fuel. Additionally, the furnace system can be continuously or intermittently tapped, at respective locations, for discharge of metal product and discardable slag.
  • the molten metal product may be retained in the furnace system, after tapping off the slag, thereby preventing accumulation of iron oxide in the slag to a level tending to reverse reaction (6).
  • the molten metal product can be tapped from the furnace system, with a heal of slag being retained for processing of a next batch of slag to be smelted.
  • the slag if of an appropriate composition, may be smelted without addition of other slag forming material.
  • slag forming compounds such as SiO 2 AI 2 O 3 CaO and/or MgO can be added.
  • the top-submerged lancing system required by the invention is one which has a very low capital investment requirement compared with the electric or smelting furnace of the known processes.
  • the capital investment can be significantly less, in some instances up to an order of magnitude less than, that for the known processes.
  • the process of the invention preferably is able to be operated with low- cost reductant comprising coal, with this resulting in lower operating costs and enhanced reaction rates compared with reliance in the known processes on electricity or coke.
  • the known processes are unable to utilise coal as a reductant since, unlike the furnace system of the invention, the furnaces of the known processes are unable to accommodate the large volume of furnace off- gases which results from use of coal.
  • the process of the invention enables avoidance of a furnace as required by the known processes, it can enable use of such furnace, if available.
  • the slag to be smelted can be supplied to the furnace of the system used in the process of the invention from another furnace, such as an electric furnace, a flash smelting furnace or a converter.
  • slag discharged from the furnace system of the invention can be passed to another furnace, such as an electric furnace, a bath smelting furnace (such as a top-submerged lancing reactor or Noranda reactor), a suspension smelting furnace (such as an Outukumpu smelting furnace), or a converter, for further treatment such as for additional smelting for recovery of its remaining iron content.
  • the process can be operated to produce a sulphidised metal product, if required.
  • This can be achieved by adding, and smelting the slag in the presence of, a sulphide such as FeS, pyrite, pyrrhotite or other concentrate including FeS, FeS 2 or other metal sulphides such as a copper concentrate, or sulphates such as CaSO 4 , or a sulphidising agent such as sulphur, in each case to react with the metal product to generate a sulphide phase (matte).
  • a sulphide such as FeS, pyrite, pyrrhotite or other concentrate including FeS, FeS 2 or other metal sulphides such as a copper concentrate, or sulphates such as CaSO 4
  • a sulphidising agent such as sulphur
  • the process of the invention can accommodate a limited addition of cobalt-containing or other metal-containing secondary material, reverts or scrap to the slag to enable additional metal to be taken-up in the metal product or matte. Additionally, or alternatively, some ores or concentrates can be charged to the furnace of the system for smelting with the slag, such as to produce a metal product of a composition suitable for production of a required alloy, although it generally is not desirable that cobalt-containing ore or concentrate be used for this purpose.
  • the ratio of free- oxygen to fuel supplied by top-submerged injection to the or each combustion zone provides a substoichiometric level of oxygen. In that ratio, the level of free oxygen can be from 80% to 95% of stoichiometric requirements for full combustion of the fuel. However, the actual level can vary, depending on the mode of operation in use of the process.
  • the process can be operated in one stage producing a single cobalt- containing product, or in two stages. In the latter case, the process may utilise a first stage operated at a higher substoichiometric level of free-oxygen, usually in excess of about 85% such as about 90% of the stoichiometric level, to produce for example a copper-rich metal product containing a minor proportion of recovered cobalt. The process then may utilise a second stage, after separation of the copper-rich metal, which is operated at a lower substoichiometric level of free-oxygen such as from about 85% down to 60%, or lower, of the stoichiometric level, to produce iron-rich metal product containing the balance of recovered cobalt.
  • the principal heat energy source is provided, at the or each combustion zone, by combustion of injected fuel by free-oxygen provided by the top-submerged injection.
  • This gas can be combusted above the slag by free-oxygen blown into the furnace space and heat energy from such post-combustion or after-burning supplements heat energy is taken up by the slag.
  • the take-up of heat energy from post-combustion can increase the operating temperature to a required level and/or reduce the level of free-oxygen and fuel consumed as a consequence of the top-submerged injection.
  • Free-oxygen for post-combustion or after-burning can be supplied by any suitable means. It may be blown into the furnace space, above the slag, by a top blowing lance; that is, by a lance which does not provide for top-submerged injection. However, a lance which does provide top-submerged injection of free-oxygen containing gas and fuel into the slag also can be used to blow free-oxygen into the furnace space above the slag. In the latter case, the top-submerged injection lance may be of a form disclosed in our Australian patent specification 640955 (corresponding to US 5251879) or our Australian patent specification 647669 (corresponding to US 5308043) the disclosures of which are incorporated herein and to be read as part of the present disclosure.
  • a lance of the form disclosed in those specifications has a shroud, disposed around an upper part thereof, through which a lance cooling gas is able to be passed for discharge into the furnace space.
  • the cooling gas is or includes free-oxygen, which provides for post-combustion or after burning above the slag.
  • the top-submerged injecting lance or lances can be of any suitable form.
  • Figure 1 is a schematic, sectional representation of a top-submerged lancing injection furnace system according to the invention
  • Figure 2 is a flow-chart depicting operation with the system of Figure 1 in a single stage process
  • Figure 3 is a flow-chart depicting operation with the system of Figure 1 in a two stage process.
  • the system 10 shown therein includes a furnace 12 and a top-submerged injecting lance 14.
  • Furnace 12 is of a suitable refractory material and, in use, holds molten cobalt-containing slag 16 from a furnace used to process nickel or copper concentrate or matte, and which additionally contains iron with copper and/or nickel. Adjacent to its base, furnace 12 has a taphole 18 for tapping molten metal 20 (and/or matte), and a taphole 22 for tapping slag 16.
  • Furnace 12 also has an off-take flue 24 through which fume and off- gases can be discharged for subsequent processing.
  • furnace 12 has a feed port 26, with a feed-control device 26a, by which reductant such as coal and, if required, flux material is able to be charged into the furnace.
  • Adjacent port 26, furnace 12 additionally has an opening 28 through which lance 14 extends and, while not shown, system 12 further includes means by which lance 14 is able to be raised and lowered.
  • lance 14 With establishment of a sufficient depth of slag 16 in furnace 12, injection via lance 14 is commenced. In an initial stage, lance 14 is positioned so that its lower discharge end is above the slag, to cause splashing of the slag 16 and formation of a coating 30 on the outer surface of lance 12. The cooling effect of gas passing through lance 14 freezes coating 30 so as to protect the lance from corrosion by molten slag 16. Lance 14 then is positioned so that its lower end is at a required level below the slag surface, to enable top- submerged injection in the slag 16. Despite the lower end of the lance 14 being in the molten slag 16, coating 30 is able to be maintained by the cooling effect of gas passing through lance 14.
  • top-submerged injection With lance 14 positioned for top-submerged injection, fuel such as oil and free-oxygen containing gas such as air is supplied to the upper end thereof from suitable sources (not shown) for injection within the slag 16. Also, reductant such as coal and, if required, suitable flux material is charged via port 26 onto slag 16. The top-submerged injection establishes substantial turbulence within slag 16, as depicted by arrows A and splashing of slag 16, and a combustion and oxidising zone 32 at the lower end of lance 14 in which the fuel is substantially fully combusted.
  • fuel such as oil and free-oxygen containing gas such as air is supplied to the upper end thereof from suitable sources (not shown) for injection within the slag 16.
  • reductant such as coal and, if required, suitable flux material is charged via port 26 onto slag 16.
  • the top-submerged injection establishes substantial turbulence within slag 16, as depicted by arrows A and splashing of slag 16, and a combustion
  • Flux material melts and combines with slag 16 to achieve and/or maintain a suitable level of slag basicity and/or fluidity.
  • the reductant preferably in lump form, floats on the top of slag 16 and establishes an upper smelting and reducing zone 34, above the combustion zone 32.
  • the reductant reduces metal species in the slag 16 to the metal, by reactions (1) and (2) in the case of cobalt and iron.
  • the turbulence resulting from submerged injection circulates fresh slag to zone 34 to maintain such reduction.
  • reactions (3) to (7) occur to varying degrees within slag 16, but with the conditions favouring reduction of cobalt species to the metal to a substantially greater extent, relative to reduction of iron species to the metal, than is possible with conventionally processes.
  • Droplets of the molten metals settle through slag 16 to establish a layer of molten metal 20 below slag 16, in a quiescent zone at the base of furnace 12.
  • slag 16 Carbon monoxide and hydrogen produced during the smelting and combustion operation is evolved from slag 16 into the furnace space above the slag. These gases, and any entrained carbon dust, can be subjected to post- combustion or after-burning in zone 36 of that space.
  • free-oxygen containing gas such as air can be supplied to zone 36 by a lance (not shown) extending laterally through an upper portion of furnace 12.
  • lance 14 can be of the form of Australian patent specification 640955 or 647669, which has a shroud which terminates in or adjacent to zone 36, with the free- oxygen containing gas for post-combustion being discharged within furnace 12, above slag 16, via the lower end of the shroud.
  • molten metal 20 is tapped from furnace 12 via taphole 18.
  • slag 16 can be tapped from furnace 12 via taphole 22.
  • the operation may be continuous, with continuous or periodic charging of fresh slag, or it may be batchwise. In the latter case a heel of slag 16 preferably is retained in furnace 12 to facilitate commencement of a next cycle of operation with a fresh charge of slag.
  • the alloy metal produced during the 90 minute smelting period contained 35% Cu, 11.6% Ni, 6.1% Co and 38.9% Fe.
  • the resultant slag contained 0.42% Cu, 0.01% Ni and 0.08% Co, indicating a very substantial recovery of cobalt, and an attainment of an alloy having a high Co/Fe ratio relative to conventional processes. The ratio is very significantly enhanced relative to that for the initial slag, while the alloy was suitable for processing for cobalt recovery.
  • the resultant slag was suitable for disposal or use for a variety of purposes.
  • Molten alloy produced in the first stage was tapped from the furnace before the second stage.
  • the alloy contained from 4-15% Co, 30-70% Fe, 1-25% Cu and 1-25% Ni.
  • the slag resulting from the first stage was retained in the furnace and subjected to second stage smelting.
  • a sulphidising agent was supplied to the furnace to result in metal produced being provided as a sulphide matte phase.
  • the sulphidising agent was selected from sulphidic copper concentrate, pyrite, pyrrhotite, sulphur, or a mixture of a sulphate such as gypsum with carbon and oxidic or metallic iron. Otherwise, the procedure was as for the first stage but with the lance fired at less than 85% stoichiometry, and maintenance of a bath temperature of from 1200 to 1350°C.
  • the matte produced has a metal content comprising 4-25% Co, 20-60% Fe, 1-25% Cu and 1-25% Ni.
  • the matte was upgraded in the same furnace.
  • the upgrading was performed by blowing the heel of slag with the lance, while supplying fluxes such as silica to the slag.
  • the blowing from above the surface of the slag rather than top-submerged injection, was without addition of reductant, and resulted in oxidation of iron in the matte to increase the level of FeO and FeO ! 5 in the slag.
  • the upgraded matte depending on the composition of the initial matte and the duration of blowing, had a metal content of 10-25% Co, 10-50% Fe, 5-25% Cu and 5-25% Ni.
  • the alloy produced by the single stage process or the first stage of a two stage process, as well as the sulphidised matte product, are suitable for sale to Co refineries, or to be refined, for the recovery of Co, as well as other metals including Cu and Ni, as the metal.
  • the slags able to be used can have a relatively high magnesium content, as the process of the invention is able to accommodate operating temperatures of about 1500°C necessitated by such slags.

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  • Chemical & Material Sciences (AREA)
  • Manufacturing & Machinery (AREA)
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  • Mechanical Engineering (AREA)
  • Metallurgy (AREA)
  • Organic Chemistry (AREA)
  • Life Sciences & Earth Sciences (AREA)
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Abstract

Cette invention concerne un procédé de récupération de cobalt à partir de scorie en fusion comportant des éléments contenant du cobalt et du fer, ledit procédé faisant usage d'un système de four à lance d'injection immergée par le haut. On fond la scorie dans un four du système (i) en chargeant un agent réducteur contenant du carbone dans la scorie en fusion se trouvant dans le four de manière à produire une région de réduction au niveau ou à proximité de la surface supérieure de la scorie, et (ii) en injectant un gaz contenant de l'oxygène libre et un carburant de combustion à l'intérieur de la scorie au moyen d'une lance immergée par le haut du système de four de façon à produire une région de combustion entre la surface supérieure et la surface inférieure de la scorie. Ce procédé permet de réguler le contenu en fer du produit obtenu, par ajustement de la distance de la région de combustion par rapport à l'interface scorie/métal.
PCT/AU1996/000779 1995-12-07 1996-12-04 Recuperation de cobalt a partir de scorie WO1997020958A1 (fr)

Priority Applications (1)

Application Number Priority Date Filing Date Title
AU76865/96A AU702608B2 (en) 1995-12-07 1996-12-04 Recovery of cobalt from slag

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
AUPN7014 1995-12-07
AUPN7014A AUPN701495A0 (en) 1995-12-07 1995-12-07 Recovery of cobalt from slag

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WO1997020958A1 true WO1997020958A1 (fr) 1997-06-12

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WO (1) WO1997020958A1 (fr)
ZA (1) ZA9610143B (fr)

Cited By (5)

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Publication number Priority date Publication date Assignee Title
WO2000014285A1 (fr) * 1998-09-04 2000-03-16 Technological Resources Pty Ltd Procede de fusion directe
WO2006079132A1 (fr) * 2005-01-27 2006-08-03 Patco Engineering Gmbh Procede pour reduire des laitiers contenant des oxydes metalliques, ou pour vitrifier et/ou degazer des matieres minerales en fusion, et dispositif pour mettre en oeuvre le procede
US8016912B2 (en) 2007-09-14 2011-09-13 Barrick Gold Corporation Process for recovering platinum group metals using reductants
WO2018073145A1 (fr) * 2016-10-21 2018-04-26 Umicore Procédé de recyclage de matériaux renfermant du cobalt
RU2827774C1 (ru) * 2023-04-10 2024-10-01 Общество с ограниченной ответственностью "НОРД Инжиниринг" Способ обеднения металлургических шлаков, содержащих цветные металлы

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CN114251948B (zh) * 2020-09-22 2023-07-25 中冶长天国际工程有限责任公司 烧结燃料偏析布料装置及方法

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US4236915A (en) * 1978-12-21 1980-12-02 Queneau Paul Etienne Process for oxygen sprinkle smelting of sulfide concentrates
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US4236915A (en) * 1978-12-21 1980-12-02 Queneau Paul Etienne Process for oxygen sprinkle smelting of sulfide concentrates
US4380469A (en) * 1979-12-18 1983-04-19 Voest-Alpine Aktiengesellschaft Process and apparatus for continuously reducing and melting metal oxides and/or pre-reduced metallic materials
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Cited By (11)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
WO2000014285A1 (fr) * 1998-09-04 2000-03-16 Technological Resources Pty Ltd Procede de fusion directe
CZ302736B6 (cs) * 1998-09-04 2011-10-12 Technological Resources Pty Ltd Zpusob prímého tavení a nádoba na výrobu kovu
WO2006079132A1 (fr) * 2005-01-27 2006-08-03 Patco Engineering Gmbh Procede pour reduire des laitiers contenant des oxydes metalliques, ou pour vitrifier et/ou degazer des matieres minerales en fusion, et dispositif pour mettre en oeuvre le procede
US7905940B2 (en) 2005-01-27 2011-03-15 Sgl Carbon Se Method for reducing metal oxide slags or glasses and/or for degassing mineral melts, and device for carrying out said method
US8016912B2 (en) 2007-09-14 2011-09-13 Barrick Gold Corporation Process for recovering platinum group metals using reductants
WO2018073145A1 (fr) * 2016-10-21 2018-04-26 Umicore Procédé de recyclage de matériaux renfermant du cobalt
KR20190075979A (ko) * 2016-10-21 2019-07-01 유미코아 코발트 함유 재료의 리사이클링 방법
JP2019536902A (ja) * 2016-10-21 2019-12-19 ユミコア コバルト担持材料をリサイクルするためのプロセス
EA038396B1 (ru) * 2016-10-21 2021-08-20 Юмикор Способ переработки кобальтсодержащих материалов
KR102545429B1 (ko) * 2016-10-21 2023-06-19 유미코아 코발트 함유 재료의 리사이클링 방법
RU2827774C1 (ru) * 2023-04-10 2024-10-01 Общество с ограниченной ответственностью "НОРД Инжиниринг" Способ обеднения металлургических шлаков, содержащих цветные металлы

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