EP0153353A1 - Procede de recuperation de metaux lourds non ferreux et de metaux precieux a partir de materiaux contenant du carbone - Google Patents

Procede de recuperation de metaux lourds non ferreux et de metaux precieux a partir de materiaux contenant du carbone

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Publication number
EP0153353A1
EP0153353A1 EP84903057A EP84903057A EP0153353A1 EP 0153353 A1 EP0153353 A1 EP 0153353A1 EP 84903057 A EP84903057 A EP 84903057A EP 84903057 A EP84903057 A EP 84903057A EP 0153353 A1 EP0153353 A1 EP 0153353A1
Authority
EP
European Patent Office
Prior art keywords
gasification
carbon
reactor
gasification reactor
coking
Prior art date
Legal status (The legal status 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 status listed.)
Withdrawn
Application number
EP84903057A
Other languages
German (de)
English (en)
Inventor
Rudolf Jeschar
Wolfgang PÖTKE
Reinhard Wagner
Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.)
SONNENBERG Heinrich
Original Assignee
SONNENBERG Heinrich
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 SONNENBERG Heinrich filed Critical SONNENBERG Heinrich
Publication of EP0153353A1 publication Critical patent/EP0153353A1/fr
Withdrawn legal-status Critical Current

Links

Classifications

    • C—CHEMISTRY; METALLURGY
    • C10—PETROLEUM, GAS OR COKE INDUSTRIES; TECHNICAL GASES CONTAINING CARBON MONOXIDE; FUELS; LUBRICANTS; PEAT
    • C10J—PRODUCTION OF PRODUCER GAS, WATER-GAS, SYNTHESIS GAS FROM SOLID CARBONACEOUS MATERIAL, OR MIXTURES CONTAINING THESE GASES; CARBURETTING AIR OR OTHER GASES
    • C10J3/00—Production of combustible gases containing carbon monoxide from solid carbonaceous fuels
    • C10J3/02—Fixed-bed gasification of lump fuel
    • C—CHEMISTRY; METALLURGY
    • C10—PETROLEUM, GAS OR COKE INDUSTRIES; TECHNICAL GASES CONTAINING CARBON MONOXIDE; FUELS; LUBRICANTS; PEAT
    • C10J—PRODUCTION OF PRODUCER GAS, WATER-GAS, SYNTHESIS GAS FROM SOLID CARBONACEOUS MATERIAL, OR MIXTURES CONTAINING THESE GASES; CARBURETTING AIR OR OTHER GASES
    • C10J3/00—Production of combustible gases containing carbon monoxide from solid carbonaceous fuels
    • C10J3/02—Fixed-bed gasification of lump fuel
    • C10J3/20—Apparatus; Plants
    • C10J3/30—Fuel charging devices
    • C—CHEMISTRY; METALLURGY
    • C10—PETROLEUM, GAS OR COKE INDUSTRIES; TECHNICAL GASES CONTAINING CARBON MONOXIDE; FUELS; LUBRICANTS; PEAT
    • C10J—PRODUCTION OF PRODUCER GAS, WATER-GAS, SYNTHESIS GAS FROM SOLID CARBONACEOUS MATERIAL, OR MIXTURES CONTAINING THESE GASES; CARBURETTING AIR OR OTHER GASES
    • C10J3/00—Production of combustible gases containing carbon monoxide from solid carbonaceous fuels
    • C10J3/02—Fixed-bed gasification of lump fuel
    • C10J3/20—Apparatus; Plants
    • C10J3/34—Grates; Mechanical ash-removing devices
    • C10J3/36—Fixed grates
    • 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
    • C22B1/00—Preliminary treatment of ores or scrap
    • 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
    • C22B11/00—Obtaining noble metals
    • C22B11/02—Obtaining noble metals by dry processes
    • C22B11/021—Recovery of noble metals from waste materials
    • C22B11/025—Recovery of noble metals from waste materials from manufactured products, e.g. from printed circuit boards, from photographic films, paper, or baths
    • 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
    • C22B5/16—Dry methods smelting of sulfides or formation of mattes with volatilisation or condensation of the metal being produced
    • 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
    • C22B7/001—Dry processes
    • G—PHYSICS
    • G03—PHOTOGRAPHY; CINEMATOGRAPHY; ANALOGOUS TECHNIQUES USING WAVES OTHER THAN OPTICAL WAVES; ELECTROGRAPHY; HOLOGRAPHY
    • G03C—PHOTOSENSITIVE MATERIALS FOR PHOTOGRAPHIC PURPOSES; PHOTOGRAPHIC PROCESSES, e.g. CINE, X-RAY, COLOUR, STEREO-PHOTOGRAPHIC PROCESSES; AUXILIARY PROCESSES IN PHOTOGRAPHY
    • G03C11/00—Auxiliary processes in photography
    • G03C11/24—Removing emulsion from waste photographic material; Recovery of photosensitive or other substances
    • C—CHEMISTRY; METALLURGY
    • C10—PETROLEUM, GAS OR COKE INDUSTRIES; TECHNICAL GASES CONTAINING CARBON MONOXIDE; FUELS; LUBRICANTS; PEAT
    • C10J—PRODUCTION OF PRODUCER GAS, WATER-GAS, SYNTHESIS GAS FROM SOLID CARBONACEOUS MATERIAL, OR MIXTURES CONTAINING THESE GASES; CARBURETTING AIR OR OTHER GASES
    • C10J2300/00—Details of gasification processes
    • C10J2300/09—Details of the feed, e.g. feeding of spent catalyst, inert gas or halogens
    • C10J2300/0913—Carbonaceous raw material
    • C10J2300/0916—Biomass
    • C10J2300/092—Wood, cellulose
    • C—CHEMISTRY; METALLURGY
    • C10—PETROLEUM, GAS OR COKE INDUSTRIES; TECHNICAL GASES CONTAINING CARBON MONOXIDE; FUELS; LUBRICANTS; PEAT
    • C10J—PRODUCTION OF PRODUCER GAS, WATER-GAS, SYNTHESIS GAS FROM SOLID CARBONACEOUS MATERIAL, OR MIXTURES CONTAINING THESE GASES; CARBURETTING AIR OR OTHER GASES
    • C10J2300/00—Details of gasification processes
    • C10J2300/09—Details of the feed, e.g. feeding of spent catalyst, inert gas or halogens
    • C10J2300/0913—Carbonaceous raw material
    • C10J2300/093—Coal
    • C—CHEMISTRY; METALLURGY
    • C10—PETROLEUM, GAS OR COKE INDUSTRIES; TECHNICAL GASES CONTAINING CARBON MONOXIDE; FUELS; LUBRICANTS; PEAT
    • C10J—PRODUCTION OF PRODUCER GAS, WATER-GAS, SYNTHESIS GAS FROM SOLID CARBONACEOUS MATERIAL, OR MIXTURES CONTAINING THESE GASES; CARBURETTING AIR OR OTHER GASES
    • C10J2300/00—Details of gasification processes
    • C10J2300/09—Details of the feed, e.g. feeding of spent catalyst, inert gas or halogens
    • C10J2300/0913—Carbonaceous raw material
    • C10J2300/0946—Waste, e.g. MSW, tires, glass, tar sand, peat, paper, lignite, oil shale
    • C—CHEMISTRY; METALLURGY
    • C10—PETROLEUM, GAS OR COKE INDUSTRIES; TECHNICAL GASES CONTAINING CARBON MONOXIDE; FUELS; LUBRICANTS; PEAT
    • C10J—PRODUCTION OF PRODUCER GAS, WATER-GAS, SYNTHESIS GAS FROM SOLID CARBONACEOUS MATERIAL, OR MIXTURES CONTAINING THESE GASES; CARBURETTING AIR OR OTHER GASES
    • C10J2300/00—Details of gasification processes
    • C10J2300/09—Details of the feed, e.g. feeding of spent catalyst, inert gas or halogens
    • C10J2300/0953—Gasifying agents
    • C10J2300/0956—Air or oxygen enriched air
    • C—CHEMISTRY; METALLURGY
    • C10—PETROLEUM, GAS OR COKE INDUSTRIES; TECHNICAL GASES CONTAINING CARBON MONOXIDE; FUELS; LUBRICANTS; PEAT
    • C10J—PRODUCTION OF PRODUCER GAS, WATER-GAS, SYNTHESIS GAS FROM SOLID CARBONACEOUS MATERIAL, OR MIXTURES CONTAINING THESE GASES; CARBURETTING AIR OR OTHER GASES
    • C10J2300/00—Details of gasification processes
    • C10J2300/09—Details of the feed, e.g. feeding of spent catalyst, inert gas or halogens
    • C10J2300/0953—Gasifying agents
    • C10J2300/0959—Oxygen
    • C—CHEMISTRY; METALLURGY
    • C10—PETROLEUM, GAS OR COKE INDUSTRIES; TECHNICAL GASES CONTAINING CARBON MONOXIDE; FUELS; LUBRICANTS; PEAT
    • C10J—PRODUCTION OF PRODUCER GAS, WATER-GAS, SYNTHESIS GAS FROM SOLID CARBONACEOUS MATERIAL, OR MIXTURES CONTAINING THESE GASES; CARBURETTING AIR OR OTHER GASES
    • C10J2300/00—Details of gasification processes
    • C10J2300/09—Details of the feed, e.g. feeding of spent catalyst, inert gas or halogens
    • C10J2300/0953—Gasifying agents
    • C10J2300/0969—Carbon dioxide
    • C—CHEMISTRY; METALLURGY
    • C10—PETROLEUM, GAS OR COKE INDUSTRIES; TECHNICAL GASES CONTAINING CARBON MONOXIDE; FUELS; LUBRICANTS; PEAT
    • C10J—PRODUCTION OF PRODUCER GAS, WATER-GAS, SYNTHESIS GAS FROM SOLID CARBONACEOUS MATERIAL, OR MIXTURES CONTAINING THESE GASES; CARBURETTING AIR OR OTHER GASES
    • C10J2300/00—Details of gasification processes
    • C10J2300/12—Heating the gasifier
    • C10J2300/1253—Heating the gasifier by injecting hot gas
    • 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

  • the invention relates to a process for the recovery of non-ferrous and noble metals from carbon-containing materials, in particular from coking products using thermal processes.
  • the above process is used in particular for the recovery of non-ferrous and precious metals from carbon-containing old products, such as cables or films.
  • the metals can be recovered relatively easily if the carbon is burnt or gasified.
  • those processes are particularly suitable in which the melting temperature of the metals contained in the carbonaceous materials and the softening point of the ash formed are not exceeded, so that the non-ferrous or noble metals are ultimately in a dry ash. Otherwise, caking or sticking and thus an adverse blockage of the reactors used can occur.
  • the method described above, in which carbon is burned off does not allow controlled temperature control. The temperatures occurring in the combustion process can rise so much, at least locally, that the melting temperatures of the metals or the softening points of the ashes are exceeded. This leads not only to losses of metal, but also to a considerable process disruption.
  • the gasification of the carbon is therefore preferable to the combustion.
  • a gas mixture containing water vapor (H 2 0), carbon dioxide (C0 2 ) and oxygen (0 «) serves as the gasifying agent.
  • Oxygen is preferably used in the form of air-oxygen. The following reactions occur in the gasification of carbon:
  • the reactor When operating without oxygen, the reactor must be heated from the outside. In general, the gasification of coal, coke or carbon-containing waste products and the like is carried out with the aim of producing a clean and combustible gas with the highest possible calorific value.
  • reactor types come z. B. the bulk reactor, the fluidized bed reactor, the reactor with circulating fluidized bed and the fly dust reactor in question.
  • the gasification agent HO, CO 2 or 0_ is fed to the reactor at a relatively cold temperature below about 500.degree. At this low temperature, however, only a little CO and H 2 is formed.
  • the bed must first be heated to the generally favorable reaction temperature of about 800 to 900 ° C.
  • DE-OS 27 48 051 relates to a method for treating photographic films with a plastic base layer, a coating layer made of an adhesive and a " organic layer containing silver. " Silver recovery.
  • the photographic film is treated in a very special way in a wash tank with hot water in the presence of an enzyme with the aim of largely removing the coating layer made of adhesive.
  • the resulting washing liquid is filtered and the filter paper is roasted together with the residue in order to burn off gelatin and other non-metallic substances and to leave mainly metallic silver.
  • This known method is technically relatively complex and not to be carried out without loss. From DE-OS 27 48 051, however, it can also be seen that the most common method for recovering silver from photographic films is said to be:
  • DE-OS 23 56 393 also deals with a method for the recovery of silver from photographic films.
  • These films have a polyester film support which is provided with a slide on at least one surface onto which a gelatin / silver halide layer is applied as a cover layer. This material is cut up. The film pieces are then treated with a solvent until the lower layer is practically completely dissolved and the top layer containing gelatin is practically separated from the film carrier. The separated gelatin with the silver contained therein is then further processed in a special way. In this case, the procedure should advantageously be such that the silver is recovered from the gelatin-containing material separated from the film pieces by flameless combustion of the gelatin-containing material mixed with ammonium nitrate.
  • DE-OS 23 56 393 further points out that silver is generally recovered from film waste or used photographic films by burning the film as such and recovering the silver-containing component as ash or residue. However, such a method is said to lead to undesirable air pollution with an adverse loss of silver.
  • the invention was based on the object of proposing a method for recovering non-ferrous and noble metals from carbon-containing materials which is technically simple, trouble-free and low-loss with regard to the recyclable material and largely without environmental pollution and economically feasible.
  • this object is achieved in that a carbon-containing material with colored and / or
  • the composition (H 0 / CO / 0) of the gasification agent before entering the gasification reactor of this type is set that in the gasification Set the reactor largely to isothermal conditions, and the temperature is controlled by changing the partial pressure ratio p_ / (p-_ _ + p__).
  • any carbon-containing material with a non-ferrous and / or noble metal content can be used as the starting material, provided that because of its chemical nature it fundamentally enables the gasification process already described above, ultimately producing an ash product with a greatly increased metal content.
  • This can e.g. are cables or films that are advantageously used in lumpy or comminuted form.
  • Röntgenfil_ ⁇ _naterial films and / or images are in the foreground due to the relatively high silver content.
  • metal-containing or, in particular silver-containing plastic materials upstream 'preferably initially a coking process .to Gewin ⁇ of a non-ferrous and precious metal-containing coke and coke-like product are subjected to drying.
  • the usual coking measures can be taken.
  • the starting materials are heated in the absence of air, ie in the form of what is known as dry distillation.
  • Various processes, such as degassing, cracking, etc. take place here, with the result that a product with a comparatively high carbon content is obtained in which the non-ferrous and / or noble metals are already enriched to a certain extent.
  • These coking processes allow metal contents of about 10 to 15% by weight to be set.
  • a coking process in the present invention is the pyrolysis of importance, by which is generally the chemical decomposition of substances at 'high temperatures under Excludes air.
  • a pyrolytic process plays an important role in chemical engineering, for example in the splitting of hydrocarbons to produce pyrolytic graphite.
  • coking processes are spoken of in the context of the invention, this is to be understood as far as possible and generally relates to processes in which the original starting material has more or less been converted into a coke or a coke-like product.
  • the smoldering process for example, is also subordinate to this term. As such, this is understood to mean the dry distillation of natural fuels in the absence of air at temperatures of 450 to 600 ° C (low-temperature coking), in which all volatile constituents escape from the starting product to form a coke-like product.
  • nonferrous and / or noble metals are found in the starting materials of the process according to the invention, in particular in the coke-like starting materials.
  • non-ferrous metals is a collective name for all heavy metals (colored in themselves or in their alloys) and their alloys except iron and precious metals, ie for all heavy metals except iron. These include in particular copper, Nickel and cobalt.
  • the precious metals include the elements gold, silver, rhenium and the so-called platinum metals (ruthenium, rhodium, palladium, osmium, iridium and platinum) and others.
  • any fuels can be used, for which it only has to be ensured that a gaseous gasification agent can be produced with them, which can control water, carbon dioxide and oxygen in controllable and in particular in such quantities "that the gasification agent introduced into the gasification reactor enables an isothermal process control via its partial pressure ratio p / (p u + p r ,).
  • the term" fuel is largely used in the sense of the invention understand, which is a summary relationship for all solid, liquid or gaseous substances which, either in natural form or in a form derived therefrom by refinement, can be economically combusted with atmospheric oxygen with the release of usable heat the benefits and economy of a fuel are measured, are carbon and hydrocarbon, possibly also hydrogen.
  • Solid fuels such as wood, peat, lignite, hard coal and anthracite can be used as natural fuels, in particular in refined form as briquetted coke.
  • liquid fuels such as crude oil, heating oil, coal tar oil, aromatic or aliphatic hydrocarbons such as gasoline and benzene, and in particular whose gaseous fuels or fuel gases are used.
  • “Fuel gases” comprehensively refer to combustible technical gases (cf. Römpps Chemielexikon, 7th edition, Vol. 1, 1973, p. 421). Natural gas, luminous gas, generator gas and a wide variety of gaseous alkanes, such as methane, ethane, propane, butane and acetylene, can be used with particular advantage. These gases can all be used in a mixture.
  • the oxygen content during combustion that is to say the air factor
  • the oxygen required for the combustion is expediently introduced by atmospheric oxygen.
  • water is injected for cooling, in particular into the gas leaving the gas generator. If such a water injection is not necessary, but if the temperature is even to be increased, then the oxygen combustion stream which is fed to the combustion chamber is increased.
  • carbon dioxide and / or oxygen can be supplied before the gasification agent is introduced into the combustion reactor. The person skilled in the art can consequently recognize various control options within the scope of the invention, without it being necessary to explain them in greater detail.
  • the gas or gasification agent leaving the gas generator need not be fed to the gasification reactor at a single point. However, this is preferably done in the lower part of the gasification reactor. In general, there is also the possibility, which can be advantageous in individual cases, of supplying the gasification agent to the gasification reactor at inlets which are distributed over its height.
  • gasification reactors can be used for the process according to the invention. So it can be the gasification reactors already described in more detail above.
  • a fixed bed reactor is preferred, to which the carbonaceous material to be gasified is supplied in finely divided or piece form.
  • a fluidized bed reactor or fly ash reactor may "are likewise used. However, it is thereby ensured that due to the moving material bed only no or minor portions of finely divided material are discharged from the top of the reactor and lead to environmental pollution. If the gasification agent is already supplied to the gasification reactor at the desired gasification temperature, then combustion reactions no longer take place or only to a minor extent.
  • the 0 temperature of the gasification agent and its composition with regard to its H 2 O, CO 2 and O 2 content is set in such a way that the temperatures which occur during the gasification and which are described above in detail again ⁇ given exothermic and endothermic reactions regarding ⁇ lent the heat balance approximately.
  • the highest possible temperature should be aimed for in the gasification reactor, since then the gasification processes run more favorably.
  • the temperature or temperature required in individual cases depends on the melting point of the metals contained in the coking material that is preferably used. This temperature must be fallen far below enough so that losses of the desired metal do not occur due to melting processes and other chemical processes.
  • a coking product containing silver e.g. one obtained from X-ray films is preferably operated in a range from approximately 700 to 900 ° C, very preferably in a range from 750 to 0 850 ° C. In this case, natural gas has also proven itself as a particularly cheap fuel for producing the gasification agent.
  • the procedure is accordingly such that a temperature which appears suitable * is first selected on the basis of purely professional considerations, taking into account the above technical statements.
  • the fuel that enables the production of a gasifying agent at the desired temperature will then be selected to match this temperature.
  • the gasification reactor is first heated in a certain preliminary phase, ie not under gasification conditions by the hot gasification agent.
  • the procedure is generally as follows: as soon as the desired gasification temperature has been reached, usually after half an hour to an hour, which also depends on the spatial dimensioning of the gasification reactor used and of the material to be gasified, a kind of fine regulation takes place - valuation.
  • the process product obtained according to the invention which as a rule has a metal content of about 50 to 80% by weight, can then in turn be melted out in a simple and practically trouble-free process, e.g. in a crucible or melting furnace.
  • a simple and practically trouble-free process e.g. in a crucible or melting furnace.
  • Such devices are known in the prior art. It can be shaft ovens, hearth ovens, crucible ovens and drum and rocking ovens. This list is of course not exhaustive, but rather other devices are also conceivable in which the desired non-ferrous or noble metals are freed from the undesired accompanying materials, in particular the ash components, as part of a type of melt cleaning.
  • the heating process can be accelerated in that the gasification reactor is provided with external heating devices which additionally make temperature control possible when the gasification phenomena occur.
  • a comprehensive list of these modification options does not appear to be necessary and would otherwise go without a hitch, since the skilled person would thus not be given any additional necessary information for realizing the essential idea of the invention.
  • the figure shows an advantageous embodiment of a device with which the method according to the invention can be carried out in practice.
  • the figure shows a gas generator 1 and a reactor 20.
  • a fuel for example natural gas
  • enters the pre-burner 4 to which air is supplied as an oxygen supplier via a feed line 3.
  • Certain combustion processes are already taking place in the pre-burner 4 and are completed in the following main combustion chamber 5.
  • the main combustion chamber 5 leaves the gaseous gasifying agent, which is preferably set to the desired temperature, via line 6, which feeds the gasifying agent 20 to the gasifying reactor 20. If necessary, the gasification agent is supplied via " line 7 water,
  • the gasification agent introduced into the gasification reactor 20 then passes through a grate 8 into the one stored thereon.
  • This material 9 is located in the form of a fixed bed in the gasification reactor 20.
  • the ash-like material which is largely subjected to the gasification process, enters a funnel 10 via the grate 8 and then falls into a collecting container 11.
  • This material generally has a metal content of up to 90%.
  • a gaseous product or exhaust gas leaves the upper part of the gasification reactor 20 at the outlet 12. This gaseous product can, at least in part, not be shown again in the drawing, the gas generator 1.
  • the material 9 is preferably continuously fed to the gasification reactor 20 in such quantities that the isothermal process procedure remains practically undisturbed.
  • the starting material was a pyrolysis coke with a silver content of approximately 5.72% by weight. This material was tested in an experimental facility similar to that described above Embodiment of a device corresponds in principle, carried out. The test lasted 5 hours with a gas consumption of 15 ⁇ L. 3rd Natural gas was used as fuel. The natural gas was burned under the following conditions:
  • composition of the gasifying agent was;
  • a pyrolysis coke was used in an amount of 1285 g with the above-mentioned silver content. 141 g of ash were obtained from the material used.

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  • Chemical & Material Sciences (AREA)
  • Engineering & Computer Science (AREA)
  • Organic Chemistry (AREA)
  • Mechanical Engineering (AREA)
  • Materials Engineering (AREA)
  • Metallurgy (AREA)
  • Manufacturing & Machinery (AREA)
  • Oil, Petroleum & Natural Gas (AREA)
  • Combustion & Propulsion (AREA)
  • Life Sciences & Earth Sciences (AREA)
  • Environmental & Geological Engineering (AREA)
  • General Life Sciences & Earth Sciences (AREA)
  • Geology (AREA)
  • Physics & Mathematics (AREA)
  • General Physics & Mathematics (AREA)
  • Geochemistry & Mineralogy (AREA)
  • Manufacture And Refinement Of Metals (AREA)

Abstract

Procédé de récupération de métaux lourds non ferreux et de métaux précieux à partir de matériaux contenant du carbone, en particulier des produits de cokéfaction, en utilisant un processus thermique. Un matériau contenant du carbone et avec une certaine teneur en métaux lourds non ferreux et/ou en métaux précieux est traité dans un réacteur de gazéification au cours d'un processus largement isotherme par addition d'un agent de gazéification produit dans une chambre de combustion séparée à partir d'un combustible. Quant à sa composition (H2O/CO2/O2), l'agent de gazéification est tel que surviennent dans le réacteur de gazéification des rapports largement isothermes. La régulation de la température s'effectue grâce à la modification du rapport de pression partielle pO2/(pH2O + pCO2).
EP84903057A 1983-08-11 1984-08-07 Procede de recuperation de metaux lourds non ferreux et de metaux precieux a partir de materiaux contenant du carbone Withdrawn EP0153353A1 (fr)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
DE3329042 1983-08-11
DE19833329042 DE3329042A1 (de) 1983-08-11 1983-08-11 Verfahren zur rueckgewinnung von bunt- und edelmetallen aus kohlenstoffhaltigen materialien

Publications (1)

Publication Number Publication Date
EP0153353A1 true EP0153353A1 (fr) 1985-09-04

Family

ID=6206337

Family Applications (1)

Application Number Title Priority Date Filing Date
EP84903057A Withdrawn EP0153353A1 (fr) 1983-08-11 1984-08-07 Procede de recuperation de metaux lourds non ferreux et de metaux precieux a partir de materiaux contenant du carbone

Country Status (3)

Country Link
EP (1) EP0153353A1 (fr)
DE (1) DE3329042A1 (fr)
WO (1) WO1985000834A1 (fr)

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
RU2482200C1 (ru) * 2011-12-05 2013-05-20 Учреждение Российской Академии Наук: Амурский Научный Центр Дальневосточного Отделения Российской Академии Наук Способ обогащения бедных по содержанию золота растворов

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Publication number Priority date Publication date Assignee Title
GB8604080D0 (en) * 1986-02-19 1986-03-26 Camlaw Ltd Cutchey S J Fluidised bed process
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