EP1301642A1 - Verfahren und vorrichtung zur verminderung des sauerstoffgehaltes einer kupferschmelze - Google Patents
Verfahren und vorrichtung zur verminderung des sauerstoffgehaltes einer kupferschmelzeInfo
- Publication number
- EP1301642A1 EP1301642A1 EP01956290A EP01956290A EP1301642A1 EP 1301642 A1 EP1301642 A1 EP 1301642A1 EP 01956290 A EP01956290 A EP 01956290A EP 01956290 A EP01956290 A EP 01956290A EP 1301642 A1 EP1301642 A1 EP 1301642A1
- Authority
- EP
- European Patent Office
- Prior art keywords
- gas
- melt
- treatment furnace
- copper
- reducing
- 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
Links
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
- 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 reducing the oxygen content of a copper melt, in which at least one flushing stone is arranged in the lower region of the copper melt, from which at least one flushing gas emerges which rises in the copper melt.
- the invention further relates to a device for reducing the oxygen content of a copper melt, which is essentially designed as a self-contained treatment vessel or a closed treatment furnace and in which the copper melt can be tempered and / or mixed by means of electric current.
- filters for example, the provision of residence times for settling, the treatment by additives which react with the contaminants, the use of physical separation processes such as e.g. Flushing, applying vacuum, etc. in one or more steps, in combination with the above technologies or in individual use of these technologies in order to achieve the desired refining effects.
- deoxidizers such as' e.g. Phosphorus can also be used as an alloying element to achieve certain material properties.
- electrolytically refined copper (cathodes) is used almost continuously as the base material, whose level of contamination due to the previous refining steps (thermal and chemical) is below 100 ppm for internationally listed grades.
- the electrical melting of copper cathodes is used as a discontinuous or continuous standard process for reducing the oxygen content below 5 to 15 ppm, the cathodes additionally being used some processes beforehand to increase the melting capacity or to remove adhering / enclosed impurities up to 950 ° C via gas burner.
- the melting then takes place in an electric furnace provided with charcoal and / or reducing, largely hydrogen-free protective gas, preferably in induction furnaces. Subsequently, the liquid copper is transferred through a, if necessary, electrically heated channel, which is also flooded with reducing / protective gas, into a warming / buffering / settling furnace, likewise usually designed as an induction furnace, which is also covered with charcoal and / or is flooded with reducing / protective gas. After leaving this furnace, the melt is transferred via an, if necessary, also electrically heated and flooded with reducing / protective gas channel into an electrically heated tundish, which is also covered with charcoal and / or flooded with reducing / protective gas.
- the liquid metal from the tundish usually reaches the partly through a ceramic valve in the bottom. likewise with a reducing / protective gas and / or, for example, a mold covered with soot, in which the metal solidifies continuously and is withdrawn continuously or discontinuously.
- This standard method described is essentially based on a reducing atmosphere in the furnace and the channels and in particular on the large exchange area between metal and reducing / protective gas within the transfer in the channels and on the long residence time inside the furnace.
- processes are also known which operate the above process steps in part without or only partially with reducing / protective gas.
- processes which only attempt to achieve low oxygen contents over long dwell times of the liquid metal in an induction furnace covered with charcoal.
- This object is achieved in that the copper is first melted in a gas-fired shaft furnace and then passed to a treatment furnace via a likewise gas-fired trough.
- a device according to DE 2 517 957 C 2 can be used as the shaft furnace.
- the purging gas emerges through the copper melt by flowing out of the purging stones from below, the purging gas being composed of at least one of the purging stones in a composition with 30% to 70% reducing gas and 70% up to 30% inert gas flows out.
- the shaft furnace is designed in such a way that copper with low oxygen, hydrogen and gas contents is continuously melted and transferred to the trough.
- Another object of the present invention is to construct a device of the type mentioned in the introduction in such a way that a reduction in the oxygen content of the copper melt can be carried out in a continuous process and at an appropriate production speed.
- flushing stones are arranged in such a way that a vertical flow is formed within the copper melt from the rising flushing gas, and in addition the treatment furnace is a completely closed system with controlled conditions for Forms metal and gases.
- the method and the device are suitable for being operated continuously in full.
- the casting of the copper melt can also be carried out batchwise depending on the treatment furnaces used.
- the starting material should first be melted down in an inexpensive gas-fired shaft furnace.
- the method and the device according to the invention make it possible to produce copper continuously with an oxygen content of less than 5 ppm and with a density greater than 8.9. Both the investment costs for the manufacture of the manufacturing plant and the operating costs in DM / t reduced when performing the method compared to the prior art.
- the treatment furnace (1) is provided with an inlet part (2) and a pouring part (3).
- the copper melt is preferably transferred from above into the inlet part (2) via an inlet (4).
- a level height of the melt is provided within the inlet part (2) in such a way that a space (6) remains between the melt and an inlet cover (7) in the vertical direction above a fill level (5).
- the melt is provided within the inlet part (2) with a cover layer (8), which can be made of soot or charcoal, for example.
- the inlet (4) extends in the vertical direction into the melt, so that the melt is fed in below the cover layer (8).
- one or more inlet flushing plug (s) (10) is arranged in the area of an inlet bottom (9), from which the flushing gas mixture rises to reduce the oxygen content of the melt.
- the inlet part (2) is coupled to a connecting channel (11) to the central part (12) of the treatment furnace (1).
- the connecting channel (11) extends below the fill level of the melt in the treatment furnace (1).
- it is contemplated to arrange the connection channel (11) immediately above the inlet floor (9) and to locate an upper boundary of the connection channel (11) at a distance from the inlet floor (9) such that the inlet channel (11) is directed vertically upwards is limited to about half the fill level of the melt within the inlet part (2).
- an entrance floor (15) in the area of an entrance (14) of the central part (12) at a height that is approximately the same as or a lower level of the entrance floor (9) of the entrance part (2 ) corresponds.
- One or more sink (s) (16) can be positioned in the area of the entrance floor (15) or above the entrance floor (15).
- the melt within the central part (12) can also be provided with a cover layer (8).
- a gas collection space (17) is arranged above the cover layer (8) and is delimited in the vertical direction by an oven cover (18).
- the furnace cover (18) has a gas outlet (19).
- the sink (s) (21) is / are preferably placed in such a way that a flow of the melt within the depression (13) is generated by rising gas bubbles in such a way that the flow direction points upwards in a central region and in edge regions a flow direction in the vertical direction is realized downwards.
- These flow directions are e.g. deflected by electric fields and / or inductors so that the exchange reactions between sink and melt are strengthened / extended. This ensures that melt flowing into the area of the central part (2) is first directed towards the bottom (20) and that this ensures sufficient contact with the flushing gas flowing out of the flushing plug (s) (21).
- the flow formed can, if necessary, be supported by a provided electrical heater.
- the middle part (12) is connected to the pouring part (3) via an outflow channel (22).
- the outflow channel (22) has a height localization similar to the connecting channel (11).
- An upper height limit of the outflow channel (22) is provided at about half the fill level of the melt within the pouring part (3).
- in the The area of a channel bottom (23) of the outflow channel (22) can have one or more sink (s) (24) arranged.
- an exit floor (25) is provided, which extends approximately at the same height as the channel floor (23) and the entrance floor (15).
- One or more sinks (26) can be placed in the area of the exit floor (25) or above the exit floor (25).
- the melt can also be provided with a cover layer (8) inside the pouring part (3) and a free space (28) is provided between the pouring cover (27) and the filling level above the cover layer (8).
- a pouring base (29) In the area of a pouring base (29) there is a pouring opening (30) for discharging the melt.
- FIG. 2 shows that the starting material (31) to be melted is first fed to a melting furnace (32) and then transported via a trough (33) into the area of the treatment furnace (1).
- a flushing gas can be applied both in the region of the channel (33) and in the region of the inlet part (2), the pouring part (3) and the middle part (12). In each case, feed lines (35) for the purge gas are shown.
- the molten and already preset liquid metal flows continuously from the tap hole into the gas-fired channel (33), which is controlled and equipped in a similar way to the cathode shaft furnace.
- the copper reaches the treatment furnace (1), which can also be a casting furnace, from the gas-fired and / or electrically heated and covered and / or closed channel (33).
- sumps which are heated by inductors and in which flushing stones are arranged in the bottom and / or from above such that an intimate mixture of the liquid metal with the flushing gases takes place in these sumps.
- These swamps are connected to the trough (33) either directly or through siphons.
- the inductors mentioned above can be channel inductors as well as crucible inductors.
- the channel (33) can be arranged to be stationary or movable, depending on the use of one or more treatment / casting ovens.
- the treatment furnace (1) is preferably a self-contained, fireproof brick-lined vessel. This can be arranged in a stationary or movable manner, furthermore only be present once or several times, depending on the casting technology and / or the power design.
- the pretreated liquid copper coming into the treatment furnace * (1) is removed from the channel (33), for example via a floor drain under a bath or in a shallow inflow in the inlet area (2) of the treatment furnace, which is covered with reducing agents, for example charcoal and sealed with lids against the atmosphere initiated.
- reducing agents for example charcoal and sealed with lids against the atmosphere initiated.
- the bottom (9) and / or the sides and / or the cover (7) of the inlet part (2) are equipped with flushing nozzles so that an intimate mixing of the incoming copper with flushing gas is ensured.
- the inlet part (2) can also - depending on its capacity - be provided with inductors as in the channel (33).
- the ' so ' further treated liquid copper • arrives from the egg inlet part (2) directly or via a siphon to the middle part (12) of the treatment furnace (1).
- This part of the furnace is also sealed off from the atmosphere with a cover (18) and the metal strip in it is covered with reducing agents, for example soot.
- the bottom (20) and / or the sides and / or the entrance and exit areas of the middle part (12) are equipped with flushing nozzles so that an intimate mixing of the incoming copper with the flushing gas is guaranteed.
- the bottom (20) is provided with one or more inductor (s) and / or an electromagnetic stirrer, so that the melt is additionally moved and thereby an intimate mixture with the purge gases, with which e.g. Continuous operation of incoming and outgoing copper and with the charcoal cover takes place and, if necessary, the melt in the treatment furnace (1) is kept at the required pouring temperature or brought to it.
- inductor s
- electromagnetic stirrer e.g. Continuous operation of incoming and outgoing copper and with the charcoal cover takes place and, if necessary, the melt in the treatment furnace (1) is kept at the required pouring temperature or brought to it.
- the melt reaches the pouring part (3) directly or via a siphon, which is also filled with reducing agents, e.g. covered with charcoal and sealed with lids (27) against the atmosphere.
- reducing agents e.g. covered with charcoal and sealed with lids (27) against the atmosphere.
- flushing stones and inductors can also be installed in the pouring part (3) similarly to the pouring part (2).
- the melt then enters the mold / mold under bath via a ceramic valve and a ceramic tube including a nozzle under the bath.
- the mold can also be flanged directly to the pouring part (3) under the bath, so that the ceramic valve mentioned above is then omitted. If the mold is flanged over the bath, a corresponding mechanical or electromagnetic one can be used between the pouring part (3) and the mold Pump can be installed in a closed version, or if the mold is closed, the melt is drawn through the solidified strand into the mold using a known method.
- the non-flanged mold and the liquid metal in the upper part of the mold are e.g. covered by protective gas and / or by soot and / or by soot-charcoal mixtures against the atmosphere.
- Flanged and non-flanged molds are also covered with protective gas at the metal outlet end against the atmosphere. The metal is now frozen, but still hot.
- the protective gas used in the channel (33), in the treatment furnace (1) and in the mold essentially consists of inert gas such as e.g. Argon, nitrogen and from CO / C02 mixtures, the mixing ratios of inert gas ranging from 100% to 70% depending on the injection location and of C0 / C02 varying from 0% to 30% depending on the injection location when used according to the method described as for the invention Have proven effective.
- inert gas such as e.g. Argon, nitrogen and from CO / C02 mixtures
- a proportion of the reducing gas in the range from 40% to 60% of the total gas volume consisting of reducing gas and inert gas in the area of the flushing stones.
- the proportion of the reducing gas is typically about 50%. All of the above shares represent volume shares.
- the proportion of the reducing gas in the furnace atmosphere should be in the range from 10% to 40%. The proportion is typically about 20%.
- the proportion of oxidizing gas components in the furnace atmosphere is about 0% to 10%. Typically there is a share of 5%.
- the rinsing stones, their internal formation and their arrangement in the refractory lining or in the lids and thus with their bath height or their blowing depth as well as their local distribution and number in the channel (33) and in the treatment furnace (1) depends on the respectively existing or to be interpreted parameters.
Landscapes
- 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)
Description
Claims
Applications Claiming Priority (3)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
DE10035593 | 2000-07-21 | ||
DE10035593A DE10035593A1 (de) | 2000-07-21 | 2000-07-21 | Verfahren und Vorrichtung zur Verminderung des Sauerstoffgehaltes einer Kupferschmelze |
PCT/DE2001/002316 WO2002008476A1 (de) | 2000-07-21 | 2001-06-21 | Verfahren und vorrichtung zur verminderung des sauerstoffgehaltes einer kupferschmelze |
Publications (2)
Publication Number | Publication Date |
---|---|
EP1301642A1 true EP1301642A1 (de) | 2003-04-16 |
EP1301642B1 EP1301642B1 (de) | 2005-03-09 |
Family
ID=7649772
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
EP01956290A Expired - Lifetime EP1301642B1 (de) | 2000-07-21 | 2001-06-21 | Verfahren und vorrichtung zur verminderung des sauerstoffgehaltes einer kupferschmelze |
Country Status (7)
Country | Link |
---|---|
US (1) | US7264767B2 (de) |
EP (1) | EP1301642B1 (de) |
CN (1) | CN1271225C (de) |
AT (1) | ATE290613T1 (de) |
AU (1) | AU2001278370A1 (de) |
DE (2) | DE10035593A1 (de) |
WO (1) | WO2002008476A1 (de) |
Families Citing this family (12)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
JP4593397B2 (ja) * | 2005-08-02 | 2010-12-08 | 古河電気工業株式会社 | 回転移動鋳型を用いた連続鋳造圧延法による無酸素銅線材の製造方法 |
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 |
US20090136884A1 (en) * | 2006-09-18 | 2009-05-28 | Jepson Stewart C | Direct-Fired Furnace Utilizing An Inert Gas To Protect Products Being Thermally Treated In The Furnace |
US20090065354A1 (en) * | 2007-09-12 | 2009-03-12 | Kardokus Janine K | Sputtering targets comprising a novel manufacturing design, methods of production and uses thereof |
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 |
KR101188069B1 (ko) * | 2007-11-14 | 2012-10-04 | 천-유 창 | 리튬 이온 배터리 분야용 공기 민감성 전극 물질을 생산하는 방법 및 장치 |
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 |
Family Cites Families (19)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
DE235586C (de) | ||||
US1839927A (en) * | 1928-09-19 | 1932-01-05 | Ajax Metal Company | Recuperator or regenerator use of gases from high frequency furnaces |
US2741557A (en) | 1952-02-04 | 1956-04-10 | Norddeutsche Affinerie | Process for the deoxidation of copper |
DE928672C (de) * | 1952-02-05 | 1955-06-06 | Norddeutsche Affinerie | Verfahren zum Desoxydieren von Kupfer |
US2821472A (en) | 1955-04-18 | 1958-01-28 | Kaiser Aluminium Chem Corp | Method for fluxing molten light metals prior to the continuous casting thereof |
FR1582780A (de) | 1968-01-10 | 1969-10-10 | ||
SE328967B (de) * | 1969-02-20 | 1970-09-28 | Asea Ab | |
DE2019538A1 (de) | 1970-04-23 | 1971-11-04 | Basf Ag | Verfahren und Vorrichtung zum Entgasen und Reinigen von Metallschmelzen |
BE791287A (fr) * | 1971-11-15 | 1973-05-14 | Int Nickel Canada | Procede de pyro-affinage de cuivre |
JPS5364617A (en) | 1976-11-22 | 1978-06-09 | Furukawa Electric Co Ltd:The | Manufacture of oxygen-free high-conductivity copper |
US4139184A (en) * | 1977-06-13 | 1979-02-13 | Republic Steel Corporation | Gas stirrer |
IN152319B (de) * | 1978-06-21 | 1983-12-17 | Impact Int Pty Ltd | |
FI72752C (fi) * | 1985-11-28 | 1987-07-10 | Outokumpu Oy | Desoxidation av smaelt koppar. |
GB2220424A (en) * | 1988-07-05 | 1990-01-10 | Christopher John English | Degassing and cleaning system for molten metals |
JP2689540B2 (ja) | 1988-11-21 | 1997-12-10 | 三菱マテリアル株式会社 | 低酸素含有銅の製造方法及び製造装置 |
BR9407587A (pt) * | 1993-08-28 | 1997-01-07 | Foseco Int | Processo de purificação de metal em fusão e vaso de manipulação de metal em fusão |
DE4335643C1 (de) * | 1993-10-15 | 1994-10-27 | Mannesmann Ag | Verfahren und Vorrichtung zum Einleiten von Gasen in Metallschmelzen |
US5850034A (en) * | 1997-06-17 | 1998-12-15 | Asarco Incorporated | Making of metal products using a gas analyzer |
DE19844667A1 (de) | 1998-09-29 | 2000-03-30 | Linde Ag | Verfahren zum Polen von Kupfer |
-
2000
- 2000-07-21 DE DE10035593A patent/DE10035593A1/de not_active Ceased
-
2001
- 2001-06-21 DE DE50105546T patent/DE50105546D1/de not_active Expired - Lifetime
- 2001-06-21 EP EP01956290A patent/EP1301642B1/de not_active Expired - Lifetime
- 2001-06-21 AT AT01956290T patent/ATE290613T1/de active
- 2001-06-21 US US10/333,222 patent/US7264767B2/en not_active Expired - Lifetime
- 2001-06-21 WO PCT/DE2001/002316 patent/WO2002008476A1/de active IP Right Grant
- 2001-06-21 AU AU2001278370A patent/AU2001278370A1/en not_active Abandoned
- 2001-06-21 CN CNB018131204A patent/CN1271225C/zh not_active Expired - Lifetime
Non-Patent Citations (1)
Title |
---|
See references of WO0208476A1 * |
Also Published As
Publication number | Publication date |
---|---|
ATE290613T1 (de) | 2005-03-15 |
CN1443248A (zh) | 2003-09-17 |
DE10035593A1 (de) | 2002-01-31 |
DE50105546D1 (de) | 2005-04-14 |
WO2002008476A1 (de) | 2002-01-31 |
CN1271225C (zh) | 2006-08-23 |
US7264767B2 (en) | 2007-09-04 |
US20040007091A1 (en) | 2004-01-15 |
AU2001278370A1 (en) | 2002-02-05 |
EP1301642B1 (de) | 2005-03-09 |
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