EP1301642B1 - Procede et dispositif pour reduire la teneur en oxygene d'un bain de cuivre - Google Patents

Procede et dispositif pour reduire la teneur en oxygene d'un bain de cuivre Download PDF

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Publication number
EP1301642B1
EP1301642B1 EP01956290A EP01956290A EP1301642B1 EP 1301642 B1 EP1301642 B1 EP 1301642B1 EP 01956290 A EP01956290 A EP 01956290A EP 01956290 A EP01956290 A EP 01956290A EP 1301642 B1 EP1301642 B1 EP 1301642B1
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EP
European Patent Office
Prior art keywords
melt
treatment furnace
gas
copper
region
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.)
Expired - Lifetime
Application number
EP01956290A
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German (de)
English (en)
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EP1301642A1 (fr
Inventor
Heinrich Schliefer
Alexander Khoury
Stefan Schneider
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.)
Aurubis AG
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Norddeutsche Affinerie AG
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Publication of EP1301642A1 publication Critical patent/EP1301642A1/fr
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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
    • C22B9/00—General processes of refining or remelting of metals; Apparatus for electroslag or arc remelting of metals
    • C22B9/05—Refining by treating with gases, e.g. gas flushing also refining by means of a material generating gas in situ
    • 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 invention relates to a method for Reduction of the oxygen content of a Molten copper, in the lower part of the Copper melt arranged at least one purging plug is, from the at least one purge gas exits rises in the molten copper.
  • the invention also relates to a Device for reducing the oxygen content a molten copper, essentially as a self-contained treatment vessel or a closed treatment furnace is formed and in which the molten copper by means of electric Current tempered and / or can be mixed.
  • the cathodes additionally at some procedures before. Increase the Melting power or removal of adherent / trapped Impurities up to 950 ° C via Gas burners are heated.
  • the melting takes place in a with Charcoal and / or reducing, largely hydrogen-free inert gas provided electric furnace, preferably in induction furnaces. Subsequently a transfer of the liquid copper takes place one, if necessary, electrically heated and also flooded with reduction / inert gas Gutter in a holding / buffering / settling furnace, also usually designed as an induction furnace, the again covered with charcoal and / or with Reduction / protective gas is flooded. After this Leaving this oven, the melt is over a, if necessary, also electrically heated and with Reduction / inert gas flooded gutter into one convicted electrically heated tundish, the also covered with charcoal and / or with Reduction / protective gas is flooded. From the tundish The liquid metal usually passes through the soil attached ceramic valve in the z.T. likewise with reducing / protective gas and / or for Example with carbon black covered mold in which the Metal continuously solidifies and continuous or discontinuously withdrawn.
  • This described standard method is based in essential to a reducing atmosphere in the Oven and the gutters, and in particular on the large Exchange surface between metal and reduction / inert gas within the overpass in the gutters and on the long residence time inside the furnace.
  • this standard procedure are also known methods, some of which are the above Procedural steps without or only partially with Operate reduction / shielding gas. Also known are procedures that only last for long residence times of the liquid metal in one Induction oven under charcoal cover low Seek to achieve oxygen levels.
  • the object of the present invention is therefore to a method of the type mentioned in the introduction indicate that in large-scale application specified oxygen content reproducible and too reasonable and lower cost compared to the State of the art as described above, achieved can be.
  • a device according to the DE 2 517 957 C2 can be used as shaft furnace.
  • the purge gas by flowing out the purging stones from below through the molten copper from, wherein at least one of the purging stones the Purge gas in a composition of 30% to 70% Reduction gas and 70% to 30% inert gas flows out.
  • the shaft furnace is designed such that continuously copper with low acidity Hydrogen and gas contents melted and attached to the Gutter is passed.
  • Another object of the present invention is a device of the type mentioned in the introduction such that a reduction in the Oxygen content of the copper melt in one continuous process and with appropriate Production speed to be performed can.
  • the method and the Device suitable to the full extent to be operated continuously.
  • the molten copper may vary depending on the used treatment stoves also discontinuous be performed. In particular, it is thought, the starting material initially in one inexpensive gas-fired shaft furnace melt down.
  • the treatment oven (1) is with an inlet part (2) and a Spout (3) provided.
  • the copper melt is preferably via an inlet (4) from above into the Inlet part (2) transferred.
  • Within the Inlet part (2) becomes a level height of the melt provided such that in the vertical direction Above a filling level (5) a free space (6) between the melt and an inlet cover (7) remains.
  • the melt is within the Inlet part (2) with a cover layer (8) provided, for example, from soot or charcoal can be trained.
  • the inlet (4) extends in the vertical direction to the melt into it, so that the supply of the melt below the cover layer (8) takes place.
  • In the illustrated embodiment is in Area of an inlet floor (9) one or more Einlauf Hughes Hughes / e (10) arranged, from which the Purging gas mixture for the reduction of Oxygen content of the melt rises.
  • the inlet part (2) is connected to a connecting channel (11) to the central part (12) of the treatment furnace (1) coupled.
  • the connecting channel (11) extends below the level of the melt in the Treatment furnace (1).
  • the connecting channel (11) directly to arrange above the inlet floor (9) and a upper limit of the connection channel (11) with a distance to the inlet bottom (9) to such locate that the inlet channel (11) in vertical direction upwards about half way Level of the melt within the Inlet part (2) is limited.
  • a crucible-like or tunnel-like depression (13) provided, in which the melt flows.
  • an input bottom (15) to arrange a height of about the height or a height lower level of the inlet floor (9) of the Inlet part (2) corresponds.
  • an input bottom (15) to arrange a height of about the height or a height lower level of the inlet floor (9) of the Inlet part (2) corresponds.
  • an input bottom (15) to arrange a height of about the height or a height lower level of the inlet floor (9) of the Inlet part (2) corresponds.
  • an input bottom (15) to arrange a height of about the height or a height lower level of the inlet floor (9) of the Inlet part (2) corresponds.
  • an input bottom (15) to arrange a height of about the height or a height lower level of the inlet floor (9) of the Inlet part (2) corresponds.
  • an input bottom (15) to arrange a height of about the height or a height lower level of the inlet floor (9) of the Inlet part (2) corresponds.
  • the melt within the middle part (12) can also be provided with a cover layer (8).
  • cover layer (8) is a gas collection room (17) arranged in the vertical direction is bounded above by a furnace lid (18). Of the Furnace lid (18) has a gas outlet (19).
  • One or more Spülstein / e (21) is arranged in the region of a bottom (20) of the middle part (12).
  • the sink (s) (21) is / are preferably placed so that of rising gas bubbles a flow of melt within the well (13) is generated such that in a middle Area the flow direction in vertical Direction facing upwards and in peripheral areas a Flow direction in the vertical direction down is realized.
  • These flow directions are e.g. by electric fields or inductors amplified so deflected that the exchange reactions between sink and melt strengthened / lengthened.
  • the middle part (12) is above an outflow channel (22) connected to the spout (3).
  • Outflow channel (22) has a height localization similar to the connecting channel (11).
  • an output bottom (25) In the area of a transition of the middle part (12) in the discharge channel (22) is an output bottom (25), which is about the same Height as the channel bottom (23) and the Entrance floor (15) extends. In the area of Starting floor (25) or above the Exit floor (25) can one or more Sink / e (26) to be placed.
  • the Melt be provided with a cover layer (8) and above the cover layer (8) is between a Spout cover (27) and the filling level a free space (28) provided.
  • a spout opening (30) for discharging the Melt arranged in the area of a spout (29) in the area of a spout (29) in the area of a spout (29) in the area of a spout (29) in the area of a spout (29) is a spout opening (30) for discharging the Melt arranged.
  • FIG. 2 In the highly schematic representation in FIG. 2 is illustrated that to be melted Starting material (31) first a melting furnace (32) is fed and then via a Gutter (33) in the area of the treatment furnace (1) is transported. An application of purge gas can both in the area of the gutter (33) and in the Area of the inlet part (2), the spout part (3) and the middle part (12). drawn are each supply lines (35) for the purge gas.
  • the melted and already pre-set (inter alia, with respect to oxygen, total gas content and Impurities) liquid metal passes continuously from the stitch hole in the Gas-fired gutter (33), which in a similar way the cathode shaft furnace controlled and equipped is.
  • the copper From the gas-fired and / or electrically heated and covered and / or closed channel (33) the copper enters the treatment furnace (1), the at the same time can be casting furnace.
  • the above inductors can Be channel inductors as well as crucible inductors.
  • the groove (33) can be fixed or movable be arranged, depending on the use of one or several treatment / pouring furnaces.
  • the transfer with gas heating is like that Melting much more efficient and therefore more energy efficient than transferring to the Fully electrically heated gutters (33) of the Standard procedure.
  • the treatment furnace (1) is preferably an in a closed, fireproof walled vessel. This can be arranged stationary or movable be, continue only one or more times be present, depending on the casting technology and / or Power rating.
  • the bottom (9) and / or the sides and / or the Cover (7) of the inlet part (2) are with rinsing nozzles equipped so that an intimate mixture of the incoming copper is ensured with purge gas.
  • the inlet part (2) can also - depending on its capacity - with inductors as in the Be provided channel (33).
  • the thus treated liquid copper passes from the inlet part (2) directly or via a siphon to the central part (12) of the treatment furnace (1).
  • This part of the oven is also against the Atmosphere sealed with a lid (18) and the metal strip therein is with reducing agents, e.g. Russ, covered.
  • the bottom (20) and / or the sides and / or the Input and output areas of the middle part (12) are equipped with rinsing nozzles so that an intimate Mixing the incoming copper with the Purge gas is guaranteed.
  • the bottom (20) with one or multiple inductor (s) and / or one provided electromagnetic stirrer, so that the Melt is additionally moved and thereby a intimate mixing with the purge gases, with the e.g. continuous operation incoming and outgoing Copper takes place as well as with the charcoal cover and, if necessary, the melt in the Treatment furnace (1) on the required Held casting temperature or brought to this becomes.
  • the spout part (3) also rinsing stones and inductors similar to installed at the pouring part (2).
  • the melt then passes under the bathroom via a ceramic valve and a ceramic tube incl. nozzle under bath in the mold / molds.
  • the mold can also directly be flanged to the spout (3) under the bathroom, so that then the above-mentioned ceramic valve eliminated. Is the mold flanged over bath, so can e.g. between spout (3) and mold one appropriate mechanical or electromagnetic Pump installed in closed version be, or in self-contained mold by known method, the melt through the solidified strand pulled into the mold.
  • the non flanged mold and in the upper part the mold liquid metal is e.g. by Inert gas and / or soot and / or soot - Charcoal mixtures covered against the atmosphere.
  • Flanged as not flanged molds are also at their metal outlet end against the atmosphere covered with inert gas. The metal is now frozen, but still hot.
  • the in the gutter (33), in the treatment furnace (1) and the protective gas used in the mold is in essentially from inert gas such as e.g. Argon, Nitrogen and from CO / CO2 - mixtures, where Mixing ratios of inert gas from 100% to 70% each by injection site and by CO / CO2 from o% to 30% each after injection in the application after the described method as for the Purpose of the invention proved effective to have.
  • inert gas such as e.g. Argon, Nitrogen and from CO / CO2 - mixtures
  • the proportion of the reducing gas in the Furnace atmosphere should be in the range of 10% to 40% lie. Typically, the proportion is about 20%.
  • the proportion of oxidizing gas constituents in the Furnace atmosphere is about 0% to 10%. Typically, there is a 5% share.
  • the purgatives, their inner training and theirs Arrangement in the refractory lining or in the lids and thus with their overlying Bath height or their Einblastiefe and their local Distribution and number in the channel (33) and in the channel Treatment furnace (1) depends on the respective existing or austden parameters.

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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)

Claims (22)

  1. Procédé pour diminuer la teneur en oxygène d'un bain de cuivre fondu, dans lequel au moins un bouchon poreux dont sort au moins un gaz de brassage qui remonte dans le bain de cuivre fondu est disposé dans la zone du bain de fusion de cuivre située dans le bas dans le sens vertical, le cuivre étant d'abord fondu dans un fourneau à cuve et étant ensuite conduit dans un four de traitement par une rigole de transport, caractérisé en ce que tant dans la zone de la rigole de transport que dans la zone du four de traitement, le gaz de brassage remonte dans le bain de cuivre fondu après être sorti des bouchons poreux, en ce qu'un gaz de brassage dont la composition contient de 30 à 70 % de gaz réducteur et de 70 à 30 % de gaz inerte sort d'au moins l'un des bouchons poreux et en ce que le bain de fusion est chauffé électriquement dans le four de traitement et est déplacé dans le sens vertical.
  2. Procédé selon la revendication 1, caractérisé en ce que le gaz de brassage utilisé est composé de 40 à 60 % de gaz réducteur et de 60 à 40 % de gaz inerte.
  3. Procédé selon les revendications 1 ou 2, caractérisé en ce que le gaz de brassage utilisé est composé d'environ 50 % de gaz réducteur et d'environ 50 % de gaz inerte.
  4. Procédé selon l'une des revendications 1 à 3, caractérisé en ce que le bain de cuivre fondu présent dans le four de traitement (1) est maintenu à température et brassé par un chauffage par induction.
  5. Procédé selon l'une des revendications 1 à 4, caractérisé en ce que dans la région d'une rigole (33) située entre le four de fusion et le four de traitement (1), le bain de cuivre fondu est réchauffé et brassé par induction.
  6. Procédé selon l'une des revendications 1 à 5, caractérisé en ce que le bain de fusion du four de traitement (1) et/ou de la rigole (33) est recouvert par une couche de recouvrement (8) qui contient du carbone.
  7. Procédé selon l'une des revendications 1 à 6, caractérisé en ce que le gaz réducteur contient une proportion de monoxyde de carbone.
  8. Procédé selon l'une des revendications 1 à 7, caractérisé en ce que le gaz réducteur contient une proportion de dioxyde de carbone.
  9. Procédé selon l'une des revendications 1 à 7, caractérisé en ce que pour les bouchons poreux, on utilise un matériau qui contient des proportions en Al2O3, SiC, SiO2 ainsi que MgO.
  10. Procédé selon l'une des revendications 1 à 7, caractérisé en ce que l'on utilise un matériau poreux pour les bouchons poreux.
  11. Procédé selon l'une des revendications 1 à 7, caractérisé en ce qu'un écoulement dans la direction verticale est créé dans une partie centrale (12) du bain de fusion de cuivre du four de traitement (1).
  12. Procédé selon l'une des revendications 1 à 7, caractérisé en ce que l'écoulement créé dans le bain de fusion de cuivre est créé dans certaines zones vers le haut dans la direction verticale et dans d'autres zones vers le bas dans la direction verticale.
  13. Dispositif pour diminuer la teneur en oxygène d'un bain de cuivre fondu qui présente essentiellement un four de traitement (1) ainsi qu'une rigole de transport pour le cuivre fondu, le four de traitement (1) présentant une entrée (2), une partie centrale (12) ainsi qu'une busette de coulée (3), et dans lequel on utilise au moins un inducteur pour maintenir la température du bain de fusion de cuivre, et dans lequel est disposé, dans la zone d'un fond (20) de la partie centrale (12), au moins un bouchon poreux (21), et la partie centrale (12) présentant une section transversale de conception telle que le gaz de brassage en ascension forme, à l'intérieur du bain de cuivre fondu, un courant vertical, caractérisé en ce qu'un canal de liaison (11) est disposé entre la pièce centrale (12) et l'entrée (2), au-dessous d'un niveau de fusion et que l'inducteur est disposé, en tant que chauffage par induction pour tempérer et agiter le bain de cuivre fondu, de manière à ce que la direction d'écoulement de la fonte de cuivre, générée par l'inducteur, soit orientée verticalement, vers le haut, dans une zone centrale de la pièce centrale (12), et verticalement, vers le bas, dans les zones marginales.
  14. Dispositif selon la revendication 13, caractérisé en ce qu'un bouchon poreux (16) est disposé dans une zone de transition entre la partie centrale (12) et la partie d'entrée (2).
  15. Dispositif selon les revendications 13 ou 14, caractérisé en ce qu'au moins un bouchon poreux de sortie (26) est disposé dans une zone de transition entre la partie centrale (12) et la partie (3) qui contient la busette de coulée.
  16. Dispositif selon l'une des revendications 13 à 15, caractérisé en ce qu'un canal de sortie (2) situé en dessous du niveau du bain de fusion est disposé entre la partie centrale (12) et la partie (3) de busette de coulée.
  17. Dispositif selon l'une des revendications 13 à 16, caractérisé en ce qu'un espace (17) de collecte de gaz situé au-dessus du bain de fusion est disposé dans la partie centrale (12).
  18. Dispositif selon l'une des revendications 13 à 17, caractérisé en ce qu'un espace libre (6) situé au-dessus du bain de fusion est disposé dans la pièce d'entrée (12).
  19. Dispositif selon l'une des revendications 13 à 18, caractérisé en ce qu'un espace libre (28) situé au-dessus du niveau du bain de fusion est disposé dans la pièce (3) de busette de coulée.
  20. Dispositif selon l'une des revendications 13 à 19, caractérisé en ce qu'au moins un bouchon poreux de sortie (24) est disposé dans la zone du canal de sortie (22) entre la partie centrale (12) et la pièce (3) de busette de coulée.
  21. Dispositif selon l'une des revendications 13 à 20, caractérisé en ce que le four de traitement (1) est doté d'au moins un agitateur magnétique.
  22. Dispositif selon l'une des revendications 13 à 21, caractérisé en ce qu'au moins un bouchon poreux est disposé dans la région d'une paroi latérale du four de traitement (1).
EP01956290A 2000-07-21 2001-06-21 Procede et dispositif pour reduire la teneur en oxygene d'un bain de cuivre Expired - Lifetime EP1301642B1 (fr)

Applications Claiming Priority (3)

Application Number Priority Date Filing Date Title
DE10035593A DE10035593A1 (de) 2000-07-21 2000-07-21 Verfahren und Vorrichtung zur Verminderung des Sauerstoffgehaltes einer Kupferschmelze
DE10035593 2000-07-21
PCT/DE2001/002316 WO2002008476A1 (fr) 2000-07-21 2001-06-21 Procede et dispositif pour reduire la teneur en oxygene d"un bain de cuivre

Publications (2)

Publication Number Publication Date
EP1301642A1 EP1301642A1 (fr) 2003-04-16
EP1301642B1 true EP1301642B1 (fr) 2005-03-09

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EP01956290A Expired - Lifetime EP1301642B1 (fr) 2000-07-21 2001-06-21 Procede et dispositif pour reduire la teneur en oxygene d'un bain de cuivre

Country Status (7)

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US (1) US7264767B2 (fr)
EP (1) EP1301642B1 (fr)
CN (1) CN1271225C (fr)
AT (1) ATE290613T1 (fr)
AU (1) AU2001278370A1 (fr)
DE (2) DE10035593A1 (fr)
WO (1) WO2002008476A1 (fr)

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US8158071B2 (en) * 2006-04-29 2012-04-17 Chun-Chieh Chang Method and devices for producing air sensitive electrode materials for lithium ion battery applications
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RU2451755C2 (ru) * 2007-11-14 2012-05-27 Цун-Юй ЧАНГ Способ и устройство для производства чувствительных к воздушной среде электродных материалов для применения в батареях литий-ионных аккумуляторов
CA2705260C (fr) * 2007-11-14 2013-08-06 Chun-Chieh Chang Procede et dispositifs de production de materiaux d'electrode sensibles a l'air pour applications sur batterie a ions lithium
CN101386918A (zh) * 2008-10-30 2009-03-18 阳谷祥光铜业有限公司 一种高硫粗铜的阳极精炼方法
DE102017103016A1 (de) * 2017-02-15 2018-08-16 Mkm Mansfelder Kupfer Und Messing Gmbh Schmelzeofen zum Herstellen von wasserstoffarmen Kupfer und Verfahren zum Herstellen von wasserstoffarmen Kupfer sowie Kupferschmelze und Kupferelement
CN107664419B (zh) * 2017-08-22 2019-08-09 南通高新工业炉有限公司 一种带有除气装置的金属熔化炉
CN109112320A (zh) * 2018-10-30 2019-01-01 辽宁科技大学 一种采用透气砖供气的底吹炼铜装置
CN112658230B (zh) * 2020-12-03 2023-06-20 安徽楚江高新电材有限公司 船用电力电缆用高性能铜杆的生产工艺
DE102021121030A1 (de) 2021-08-12 2023-02-16 Otto Junker Gesellschaft mit beschränkter Haftung Vorrichtung zur induktiven Erwärmung einer Metallschmelze, Mehrkammerschmelzofen zum Schmelzen von Schrott aus Metall und Verfahren zum Schmelzen von Schrott aus Metall

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Publication number Publication date
US20040007091A1 (en) 2004-01-15
CN1443248A (zh) 2003-09-17
EP1301642A1 (fr) 2003-04-16
DE50105546D1 (de) 2005-04-14
AU2001278370A1 (en) 2002-02-05
ATE290613T1 (de) 2005-03-15
CN1271225C (zh) 2006-08-23
WO2002008476A1 (fr) 2002-01-31
US7264767B2 (en) 2007-09-04
DE10035593A1 (de) 2002-01-31

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