EP4474501A1 - System und verfahren zur raffination von kupferlegierungen - Google Patents

System und verfahren zur raffination von kupferlegierungen Download PDF

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Publication number
EP4474501A1
EP4474501A1 EP23382565.2A EP23382565A EP4474501A1 EP 4474501 A1 EP4474501 A1 EP 4474501A1 EP 23382565 A EP23382565 A EP 23382565A EP 4474501 A1 EP4474501 A1 EP 4474501A1
Authority
EP
European Patent Office
Prior art keywords
furnace
copper
refining
oxidising
copper alloy
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.)
Granted
Application number
EP23382565.2A
Other languages
English (en)
French (fr)
Other versions
EP4474501C0 (de
EP4474501B1 (de
Inventor
Oriol Guixà Arderiu
Gabriel Font Puig
Xavier Closa Roig
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.)
La Farga Yourcoppersolutions SA
Original Assignee
La Farga Yourcoppersolutions SA
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 La Farga Yourcoppersolutions SA filed Critical La Farga Yourcoppersolutions SA
Priority to ES23382565T priority Critical patent/ES3037543T3/es
Priority to EP23382565.2A priority patent/EP4474501B1/de
Publication of EP4474501A1 publication Critical patent/EP4474501A1/de
Application granted granted Critical
Publication of EP4474501C0 publication Critical patent/EP4474501C0/de
Publication of EP4474501B1 publication Critical patent/EP4474501B1/de
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Anticipated expiration legal-status Critical

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    • 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
    • C22B5/12—Dry methods smelting of sulfides or formation of mattes by gases
    • 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
    • C22B15/00—Obtaining copper
    • C22B15/0026—Pyrometallurgy
    • C22B15/0028—Smelting or converting
    • C22B15/003—Bath smelting or converting
    • C22B15/0041—Bath smelting or converting in converters
    • 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
    • C22B15/00—Obtaining copper
    • C22B15/0026—Pyrometallurgy
    • C22B15/0028—Smelting or converting
    • C22B15/0052—Reduction smelting or converting
    • 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
    • C22B15/00—Obtaining copper
    • C22B15/0026—Pyrometallurgy
    • C22B15/0056—Scrap treating
    • 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
    • C22B15/00—Obtaining copper
    • C22B15/0026—Pyrometallurgy
    • C22B15/006—Pyrometallurgy working up of molten copper, e.g. refining

Definitions

  • the object of this invention application is to register a system and method for refining copper alloys, which incorporates considerable innovations and advantages over the techniques used up until now.
  • the invention proposes the development of a system and method for refining copper alloys, which, due to its particular arrangement, achieves greater energy performance and greater efficiency in a copper refining process.
  • the reverberatory furnace is characterised by working in phases, i.e., loading, melting, oxidation, refining, reduction and smelting phase. To be efficient in the refining phase, the furnace requires a large surface of liquid copper.
  • the "Cosmelt Process” is characterised by working continuously. Loading and melting is carried out in a vertical furnace with high energy efficiency, with the loading door at the top and the burners at the bottom of the furnace. The furnace is filled with recycled material, casting in the bottom and transferring the liquid copper to a set of refining boxes with the incorporation of additives and with porous plugs for the injection of oxygen to oxidise the bath. The set of boxes work continuously until they feed two furnaces for homogenising and reducing purified liquid copper that work alternately to maintain a constant flow of purified liquid copper.
  • the present invention due to its particular arrangement, contributes to improving energy performance and greater efficiency in the recycled copper treatment processes known in the state of the art.
  • the present invention has been developed to provide a copper alloy refining system, comprising a vertical furnace, an oxidising furnace, a refining furnace, a reducing furnace and a smelting furnace, arranged sequentially one after the other in this order and mutually linked for the passage therethrough of molten copper resulting from a copper load or copper alloy load introduced into the vertical furnace; wherein the vertical furnace has a melting capacity for the introduced copper load, wherein the oxidising furnace is enabled for oxygen exchange with the molten copper coming from the vertical furnace, wherein the refining furnace is enabled to add additives to the molten copper coming from the oxidising furnace, wherein the reducing furnace is enabled to reduce the molten copper coming from the refining furnace, wherein the smelting furnace is enabled to receive the molten copper coming from the reducing furnace.
  • the vertical furnace and the smelting furnace have the capacity for continuous output of molten copper, and the oxidising furnace, the refining furnace and the reducing furnace are provided for discontinuous filling and emptying.
  • the oxidising furnace, the refining furnace and the reducing furnace have the same volumetric capacity, which is six times higher than the volumetric capacity of the vertical furnace and two times higher than the volumetric capacity of the smelting furnace.
  • the oxidising furnace has an arrangement where a ratio between the free surface (S) of the molten copper and the height (A) of the same molten copper is eight.
  • the refining furnace has an arrangement where a ratio between the free surface (S) of the molten copper and the height (A) of the same molten copper is higher than fifteen.
  • the reducing furnace has an arrangement where a ratio between the free surface (S) of the molten copper and the height (A) of the same molten copper is two.
  • the vertical furnace allows the copper load to be introduced through its upper portion, and liquid copper and slag resulting from the melting of the copper load to exit through a lower side.
  • the oxidising furnace incorporates an injection of oxygen through lances or porous plugs.
  • the refining furnace incorporates porous plugs.
  • the reducing furnace incorporates an injection of reducing agent through lances or porous plugs.
  • a copper alloy refining method comprising the following successive steps:
  • melting, oxidation, refining, reduction and smelting take place respectively in a vertical furnace, an oxidising furnace, a refining furnace, a reducer and a smelting furnace, wherein the oxidising furnace, the refining furnace and the reducing furnace have the same volumetric capacity, which is six times higher than the volumetric capacity of the vertical furnace and two times higher than the volumetric capacity of the smelting furnace.
  • oxidation takes place in an oxidising furnace that has an arrangement where a ratio between the free surface (S) of the molten copper and the height (A) of the same molten copper is eight.
  • refining takes place in a refining furnace that has an arrangement where a ratio between the free surface (S) of the molten copper and the height (A) of the same molten copper is higher than fifteen.
  • melting, oxidation, refining, reduction and smelting take place respectively in a vertical furnace, an oxidising furnace, a refining furnace, a reducer and a smelting furnace, wherein the treatment capacity in tonnes per hour of the oxidising furnace, the refining furnace and the reducing furnace are equal and six times higher than the treatment capacity in tonnes per hour of the vertical furnace and two times higher than the treatment capacity in tonnes per hour of the smelting furnace.
  • the vertical furnace continuously discharges the liquid copper in the oxidising furnace, the oxidising furnace discharges the liquid copper in the refining furnace every six hours, the refining furnace discharges the liquid copper in the reducing furnace every six hours, the reducing furnace discharges the liquid copper in the smelting furnace every three hours, and the smelting furnace continuously delivers the liquid copper.
  • the copper alloy refining method is carried out by a described copper alloy refining system.
  • the present invention relates to a copper alloy refining system, which, due to its particular arrangement, provides notable advantages to the state of the art.
  • the copper alloy refining system comprises a vertical furnace 1, an oxidising furnace 2, a refining furnace 3, a reducing furnace 4 and a smelting furnace 5, which are arranged sequentially one after the other in this order, and mutually linked for the passage therethrough of molten copper 12 resulting from a copper load 11, copper alloy load or copper scrap load introduced into the vertical furnace 1.
  • the copper load 11 introduced into the copper alloy refining system of the invention and the molten copper 12 resulting from its melting in the vertical furnace 1 therefore follows a sequential path through the vertical furnace 1, the oxidising furnace 2, the refining furnace 3, the reducing furnace 4 and the smelting furnace 5 in this order.
  • the vertical furnace 1 is arranged at the beginning of the copper alloy refining system of the invention, and it is where the copper load 11 to be treated is introduced, and it has a melting capacity for said copper load 11 introduced for its transformation into liquid copper 12.
  • Figure 2 represents a possible arrangement of the vertical furnace 1, with an introduction of the copper load 11 through its upper portion, and a continuous output of liquid copper 12 resulting from its melting and slag 13 through a lower side.
  • the liquid copper 12 coming from the same molten copper load 11 passes to the oxidising furnace 2, which is enabled for oxygen exchange with the molten liquid copper 12 coming from the vertical furnace 1.
  • the liquid copper 12 passes to the refining furnace 3, which is in turn enabled to add additives to the liquid copper 12 coming from the oxidising furnace 2.
  • the liquid copper 12 passes to the reducing furnace 4, which is enabled to reduce the liquid copper 12 coming from the refining furnace 3.
  • the liquid copper 12 passes to the smelting furnace 5, which is enabled to receive the liquid copper 12 coming from the reducing furnace 4, and its continuous delivery.
  • the copper alloy refining system of the proposed invention also has a number of particularities.
  • the oxidising furnace 2 the refining furnace 3 and the reducing furnace 4 have the same volumetric capacity.
  • said same volumetric capacity of the oxidising furnace 2, the refining furnace 3 and the reducing furnace 4 is six times higher than the volumetric capacity of the vertical furnace 1, and is simultaneously two times higher than the volumetric capacity of the smelting furnace 5. Therefore, the volumetric capacity of the smelting furnace 5 is three times higher than that of the vertical furnace 1.
  • This detail of the oxidising furnace 2 provides the advantage of having a high capacity for oxygen exchange with copper, as well as sufficient surface for the exchange of copper with fluxes.
  • the oxidising furnace 2 can also incorporate an injection of oxygen through lances or porous plugs to allow good slagging.
  • the refining furnace 3 has an arrangement where a ratio between the free surface S of the liquid copper 12 and the height A of the same liquid copper load 12 is higher than fifteen, in other words, S(m 2 )/A(m)>15, obviously using coherent units of surface and height, metres in this case.
  • This detail of the refining furnace 3 provides the advantage of a high capacity for surface exchange, with a low height of liquid copper 12 and a large section, with great ease of slagging and great movement of the copper through porous plugs, allowing the loading of additives and good automatic slagging.
  • This detail of the reducing furnace 4 entails the advantage of a high capacity for reduction exchange, with a large height of liquid copper 12 and a small section.
  • the reducing furnace 4 can also have an injection of reducing agent through lances or porous plugs.
  • the copper alloy refining system of the present invention avoids the drawbacks of the pyrometallurgical processes known in the state of the art, allows for operation and continuous casting called Circular Copper Smelter (CCS) by the applicant himself, and allows for circular copper of all types with a minimum copper content of 94% to be processed, incorporating the advantages and eliminating the limitations of the current processes known in the state of the art (reverberation and "Cosmelt Process").
  • CCS Circular Copper Smelter
  • the copper alloy refining system of the present invention optimises each furnace based on the phase that is required to purify circular copper, thus obtaining greater energy performance and greater efficiency in each copper refining process.
  • Figure 2 shows the vertical furnace 1 in greater detail, wherein the copper load 11 to be treated in its upper portion and an outlet for liquid copper 12 and slag 13 through a lower side can be seen.
  • the combustion burners 14 are displaced to the rear and allow the generation of a pool of liquid copper 12 that facilitates the transfer and exit of the slag 13 to the oxidising furnace 2.
  • the melting treatment capacity of the vertical furnace 1 will then be X tonnes/hour.
  • the volumetric capacity of the oxidising furnace 2, the refining furnace 3 and the reducing furnace 4 is six times higher than the volumetric capacity of the vertical furnace 1
  • the treatment capacity of the oxidising furnace 2 is 6X, considering X as the continuous treatment capacity in tonnes/hour for refining copper recycling by the vertical furnace 1.
  • the oxidising furnace 2 continuously receives the liquid copper 12 from the vertical furnace 1, and the liquid copper 12 is emptied and delivered to the refining furnace 3 every six hours.
  • the refining furnace 3 also with a treatment capacity of 6X, after loading the liquid copper 12 from the oxidising furnace 2, empties the liquid copper 12 to the reducing furnace 4 every six hours.
  • the treatment capacity of the reducing furnace 4 is also 6X, receiving liquid copper 12 from the refining furnace 3 every six hours.
  • the smelting furnace 5 has a treatment capacity of 3X.
  • the reducing furnace 4 discharges the liquid copper 12 to the smelting furnace 5 every three hours, and the liquid copper 12 subsequently exits the smelting furnace 5 continuously.
  • the vertical furnace 1 and the waiting and smelting furnace 5 are provided for continuous operation and transfer of the liquid copper 12, while the oxidising furnace 2, the refining furnace 3 and the reducing furnace 4 are provided for discontinuous filling and emptying.
  • the invention further includes a copper alloy refining method.
  • said method of the invention can also be carried out by using the copper alloy refining system described above and also included in the invention.
  • the copper alloy refining method included in the invention comprises the following successive steps, as represented schematically in figure 6 :
  • the said copper alloy refining method, melting 100, oxidation 101, refining 102, reduction 103 and smelting 104 take place respectively in a vertical furnace 1, an oxidising furnace 2, a refining furnace 3, a reducer 4 and a smelting furnace 5, wherein the oxidising furnace 2, the refining furnace 3 and the reducing furnace 4 have the same volumetric capacity, which is six times higher than the volumetric capacity of the vertical furnace 1 and two times higher than the volumetric capacity of the smelting furnace 5.
  • the oxidising furnace 2 where oxidation 101 takes place has an arrangement where a ratio between the free surface (S) of the molten copper 12 and the height (A) of the same molten copper 12 is eight.
  • the refining furnace 3 where refining 103 takes place has an arrangement where a ratio between the free surface (S) of the molten copper 12 and the height (A) of the same molten copper 12 is higher than fifteen.
  • reduction 104 takes place in a reducing furnace 4 that has an arrangement where a ratio between the free surface (S) of the molten copper 12 and the height (A) of the same molten copper 12 is two.
  • melting 100, oxidation 101, refining 102, reduction 103 and smelting 104 take place respectively in a vertical furnace 1, an oxidising furnace 2, a refining furnace 3, a reducer 4 and a smelting furnace 5, wherein the treatment capacity in tonnes per hour of the oxidising furnace 2, the refining furnace 3 and the reducing furnace 4 are equal and six times higher than the treatment capacity in tonnes per hour of the vertical furnace 1 and two times higher than the treatment capacity in tonnes per hour of the smelting furnace 5.
  • the vertical furnace 1 continuously discharges the liquid copper 12 in the oxidising furnace 2, the oxidising furnace 2 discharges the liquid copper 12 in the refining furnace 3 every six hours, the refining furnace 3 discharges the liquid copper 12 in the reducing furnace 4 every six hours, the reducing furnace 4 discharges the liquid copper 12 in the smelting furnace 5 every three hours, and the smelting furnace 5 continuously delivers the liquid copper 12.
  • the copper alloy refining method of the invention can also be carried out in the copper alloy refining system also included in the same invention.

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  • Engineering & Computer Science (AREA)
  • Chemical & Material Sciences (AREA)
  • Manufacturing & Machinery (AREA)
  • Materials Engineering (AREA)
  • Mechanical Engineering (AREA)
  • Metallurgy (AREA)
  • Organic Chemistry (AREA)
  • Manufacture And Refinement Of Metals (AREA)
EP23382565.2A 2023-06-08 2023-06-08 System und verfahren zur raffination von kupferlegierungen Active EP4474501B1 (de)

Priority Applications (2)

Application Number Priority Date Filing Date Title
ES23382565T ES3037543T3 (en) 2023-06-08 2023-06-08 System and method for refining copper alloys
EP23382565.2A EP4474501B1 (de) 2023-06-08 2023-06-08 System und verfahren zur raffination von kupferlegierungen

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
EP23382565.2A EP4474501B1 (de) 2023-06-08 2023-06-08 System und verfahren zur raffination von kupferlegierungen

Publications (3)

Publication Number Publication Date
EP4474501A1 true EP4474501A1 (de) 2024-12-11
EP4474501C0 EP4474501C0 (de) 2025-07-30
EP4474501B1 EP4474501B1 (de) 2025-07-30

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EP23382565.2A Active EP4474501B1 (de) 2023-06-08 2023-06-08 System und verfahren zur raffination von kupferlegierungen

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EP (1) EP4474501B1 (de)
ES (1) ES3037543T3 (de)

Citations (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US3682623A (en) * 1970-10-14 1972-08-08 Metallo Chimique Sa Copper refining process
US5511767A (en) * 1994-06-03 1996-04-30 Mitsubishi Materials Corporation Copper smelting apparatus
CN110004351A (zh) * 2019-05-23 2019-07-12 中国恩菲工程技术有限公司 含铜钢的生产系统

Patent Citations (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US3682623A (en) * 1970-10-14 1972-08-08 Metallo Chimique Sa Copper refining process
US5511767A (en) * 1994-06-03 1996-04-30 Mitsubishi Materials Corporation Copper smelting apparatus
CN110004351A (zh) * 2019-05-23 2019-07-12 中国恩菲工程技术有限公司 含铜钢的生产系统

Also Published As

Publication number Publication date
EP4474501C0 (de) 2025-07-30
ES3037543T3 (en) 2025-10-02
EP4474501B1 (de) 2025-07-30

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