EP0987338A1 - Procédépour la production de tubes soudés en cuivre - Google Patents
Procédépour la production de tubes soudés en cuivre Download PDFInfo
- Publication number
- EP0987338A1 EP0987338A1 EP99250159A EP99250159A EP0987338A1 EP 0987338 A1 EP0987338 A1 EP 0987338A1 EP 99250159 A EP99250159 A EP 99250159A EP 99250159 A EP99250159 A EP 99250159A EP 0987338 A1 EP0987338 A1 EP 0987338A1
- Authority
- EP
- European Patent Office
- Prior art keywords
- phosphorus
- melt
- casting furnace
- copper
- feed trough
- 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
- 229910052802 copper Inorganic materials 0.000 title claims abstract description 36
- 239000010949 copper Substances 0.000 title claims abstract description 36
- RYGMFSIKBFXOCR-UHFFFAOYSA-N Copper Chemical compound [Cu] RYGMFSIKBFXOCR-UHFFFAOYSA-N 0.000 title claims abstract description 34
- 238000004519 manufacturing process Methods 0.000 title claims description 16
- OAICVXFJPJFONN-UHFFFAOYSA-N Phosphorus Chemical compound [P] OAICVXFJPJFONN-UHFFFAOYSA-N 0.000 claims abstract description 36
- 229910052698 phosphorus Inorganic materials 0.000 claims abstract description 36
- 239000011574 phosphorus Substances 0.000 claims abstract description 36
- 238000005266 casting Methods 0.000 claims abstract description 24
- 239000000155 melt Substances 0.000 claims abstract description 22
- 239000000463 material Substances 0.000 claims abstract description 9
- 238000002844 melting Methods 0.000 claims abstract description 6
- 230000008018 melting Effects 0.000 claims abstract description 6
- 239000010406 cathode material Substances 0.000 claims abstract description 3
- 238000000034 method Methods 0.000 claims description 19
- 238000003466 welding Methods 0.000 claims description 14
- QVGXLLKOCUKJST-UHFFFAOYSA-N atomic oxygen Chemical compound [O] QVGXLLKOCUKJST-UHFFFAOYSA-N 0.000 claims description 13
- 229910052760 oxygen Inorganic materials 0.000 claims description 13
- 239000001301 oxygen Substances 0.000 claims description 13
- RIRXDDRGHVUXNJ-UHFFFAOYSA-N [Cu].[P] Chemical compound [Cu].[P] RIRXDDRGHVUXNJ-UHFFFAOYSA-N 0.000 claims description 4
- 238000005097 cold rolling Methods 0.000 claims description 4
- 238000003756 stirring Methods 0.000 claims description 4
- 229910000881 Cu alloy Inorganic materials 0.000 claims description 3
- 239000008187 granular material Substances 0.000 claims description 3
- 230000001939 inductive effect Effects 0.000 claims description 3
- 239000007788 liquid Substances 0.000 claims description 3
- 239000012080 ambient air Substances 0.000 claims description 2
- 238000001816 cooling Methods 0.000 claims description 2
- 230000005672 electromagnetic field Effects 0.000 claims description 2
- 238000005098 hot rolling Methods 0.000 claims description 2
- 238000005259 measurement Methods 0.000 claims description 2
- 238000002156 mixing Methods 0.000 claims description 2
- 230000007717 exclusion Effects 0.000 claims 1
- 239000007789 gas Substances 0.000 claims 1
- 238000010992 reflux Methods 0.000 claims 1
- 239000003638 chemical reducing agent Substances 0.000 abstract description 3
- 238000005096 rolling process Methods 0.000 description 4
- 238000010276 construction Methods 0.000 description 2
- 238000010924 continuous production Methods 0.000 description 2
- 230000033001 locomotion Effects 0.000 description 2
- 239000002184 metal Substances 0.000 description 2
- 229910052751 metal Inorganic materials 0.000 description 2
- CWYNVVGOOAEACU-UHFFFAOYSA-N Fe2+ Chemical compound [Fe+2] CWYNVVGOOAEACU-UHFFFAOYSA-N 0.000 description 1
- UFHFLCQGNIYNRP-UHFFFAOYSA-N Hydrogen Chemical compound [H][H] UFHFLCQGNIYNRP-UHFFFAOYSA-N 0.000 description 1
- 230000015572 biosynthetic process Effects 0.000 description 1
- 239000003795 chemical substances by application Substances 0.000 description 1
- 239000004020 conductor Substances 0.000 description 1
- 239000000356 contaminant Substances 0.000 description 1
- 238000009749 continuous casting Methods 0.000 description 1
- 239000013078 crystal Substances 0.000 description 1
- 238000009826 distribution Methods 0.000 description 1
- 238000004870 electrical engineering Methods 0.000 description 1
- 238000005516 engineering process Methods 0.000 description 1
- 238000010438 heat treatment Methods 0.000 description 1
- 229910052739 hydrogen Inorganic materials 0.000 description 1
- 239000001257 hydrogen Substances 0.000 description 1
- 150000003017 phosphorus Chemical class 0.000 description 1
- 230000000704 physical effect Effects 0.000 description 1
- 239000011265 semifinished product Substances 0.000 description 1
- 239000002893 slag Substances 0.000 description 1
- 238000005476 soldering Methods 0.000 description 1
- 239000007787 solid Substances 0.000 description 1
- QAOWNCQODCNURD-UHFFFAOYSA-L sulfate group Chemical group S(=O)(=O)([O-])[O-] QAOWNCQODCNURD-UHFFFAOYSA-L 0.000 description 1
- 238000009966 trimming Methods 0.000 description 1
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
- 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 producing welded pipes made of Cu and Cu alloys in a combined production line consisting of one in Line arranged melting furnace, a casting furnace, a belt caster, a Hot rolling mill, a cooling section, a cold rolling mill and a coil device, as well as the subsequent pipe forming and welding section with a subsequent one if necessary Pulling device for the welded pipe.
- a process is not in the Pre-published German patent application 197 34 780.0 described.
- the process described is advantageous because it is in a continuous Process flow is economically capable of welding copper pipes and tubes to produce from copper alloys in low to high capacity.
- the continuous Process sequence using casting machines with very high Casting speeds enable the high capacity on the one hand, without that on the other To negatively influence the quality of the pipes. This is the first time in practice created a useful method for producing welded non-ferrous metal pipes, the due to its high capacity, flexibility and low cost is economically applicable
- Copper cathodes contain minor Amounts of oxygen, u. a. from adhering sulfate residues. Because oxygen in one hand small amounts have only a slight harmful influence on the electrical, has mechanical and physical properties of the copper and on the other hand the Oxygen oxidizes other contaminants, its presence reduces that Conductivity and cold formability of the copper hardly. For this reason, the Electrical engineering mostly uses oxygen-containing copper. When soldering and welding however, there is a risk of hydrogen embrittlement from oxygen-containing copper, therefore such types of copper cannot be used for the production of pipes become. Oxygen-free copper is required here.
- the object of the present invention is to implement the method described at the outset Manufacture of welded copper pipes through further process steps optimize that improve the weldability of the rolled strip and thus the Allow production of a longitudinally welded pipe of high quality.
- the known method is improved in that Primary material for the welded pipes return or cathode material melted down and fed into the casting furnace via a feed trough, whereby for deoxidation of the copper melt to oxygen-free copper phosphorus in small amount as a reducing agent in the casting furnace or directly in the Feed trough is introduced.
- the excess of phosphorus from the solid copper recorded with mixed crystal formation.
- An SF copper is obtained in this way according to DIN 1708 or 1787, which is also known as DHP-Copper from US standards.
- an oxygen-free pipe should therefore be used for longitudinally welded pipes Copper with 0.015 to 0.040% phosphorus with a fluctuation range of ⁇ 30 ppm be used.
- the known wire rod processes for electrolytic copper usually work with gas-fired casting furnaces. These are disadvantageous for oxygen-free copper; because on This is due to the insufficient bath movement of the melt in such furnaces Tolerance field of the residual phosphorus content used for the manufacture of welded Pipe is essential not to be followed.
- the invention proposes according to another feature that the mixing of the melt in the Casting furnace or in the feed trough by means of alternating electromagnetic fields inductive stirring coil. Due to the even distribution of the phosphorus in the Melt is achieved that when welding the pipe due to constant Conductivity in the welding pipe belt fewer errors occur, the quality of the pipe gets better and the reject rate drops.
- the casting furnace or the feed trough can be gas-heated or else be heated inductively.
- the bath can the melt is set in motion by an additional inductive stirring coil become.
- Induction-heated casting furnaces are suitable, which are equipped with Channel or crucible inductors are equipped, their electromagnetic Alternating fields are used to make the copper melt intense as well to mix that the phosphorus content only fluctuates by ⁇ 30 ppm.
- the oxygen content and / or the Average residual phosphorus content of the melt can be measured and used on hand the measured values determine the amount of phosphorus added to the melt which is required to bind the remaining oxygen in the liquid copper and to raise the total phosphorus content to the required value.
- the oxygen content in the melt is measured before the addition of Phosphorus.
- the phosphorus content of the melt is preferably between values 0.018% and 0.030% set.
- the melting furnace is charged either with only cathodes or with additional return material. If the return material comes from pipe production, it already has a certain phosphorus content. If this phosphorus content is measured before charging and the weight ratio between cathode copper and return material is known, the average residual phosphorus content of the melt can be determined. On the basis of the measured oxygen content of the melt, it is now also possible to determine the amount of phosphorus added, which is preferably supplied in the form of phosphorus copper granules and with which the remaining oxygen in the liquid copper is bound in order to bring the total phosphorus content to a value which complies with the regulations to raise
- the measurement can be carried out continuously or at appropriate intervals over a period below Ambient air closure working phosphor dosing with which the amount of phosphorus required for deoxidation as phosphor-copper granules the melt is removed.
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)
- Continuous Casting (AREA)
Applications Claiming Priority (2)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| DE19843235 | 1998-09-09 | ||
| DE19843235 | 1998-09-09 |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| EP0987338A1 true EP0987338A1 (fr) | 2000-03-22 |
| EP0987338B1 EP0987338B1 (fr) | 2003-06-25 |
Family
ID=7881702
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| EP99250159A Expired - Lifetime EP0987338B1 (fr) | 1998-09-09 | 1999-05-19 | Procédépour la production de tubes soudés en cuivre |
Country Status (3)
| Country | Link |
|---|---|
| EP (1) | EP0987338B1 (fr) |
| DE (1) | DE59906069D1 (fr) |
| ES (1) | ES2196718T3 (fr) |
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN107805722A (zh) * | 2017-12-12 | 2018-03-16 | 芜湖精艺铜业有限公司 | 无氧铜铸造炉 |
| CN115493402A (zh) * | 2022-08-29 | 2022-12-20 | 金川集团股份有限公司 | 一种工频感应炉熔沟凝固和二次起熔的方法 |
| CN116200621A (zh) * | 2023-04-23 | 2023-06-02 | 弋阳县宏田金属制品有限公司 | 一种耐高压脱氧铜管及其制备方法 |
Citations (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| GB951550A (en) * | 1961-06-21 | 1964-03-04 | Foseco Int | Degassing and deoxidation of copper and copper-base alloys |
| GB1000310A (en) * | 1961-10-12 | 1965-08-04 | Siemens Ag | Improvements relating to the melting and refining of metals |
| JPS52145327A (en) * | 1976-05-31 | 1977-12-03 | Furukawa Metals Co | Copper alloy with anti softening property |
| JPH06212300A (ja) * | 1993-01-14 | 1994-08-02 | Kobe Steel Ltd | シャフト炉を用いたｐ含有低酸素銅の製法 |
| DE19734780C1 (de) * | 1997-08-06 | 1998-12-10 | Mannesmann Ag | Verfahren zur Herstellung von geschweißten Rohren aus Cu und Cu-Legierungen |
-
1999
- 1999-05-19 DE DE59906069T patent/DE59906069D1/de not_active Expired - Fee Related
- 1999-05-19 EP EP99250159A patent/EP0987338B1/fr not_active Expired - Lifetime
- 1999-05-19 ES ES99250159T patent/ES2196718T3/es not_active Expired - Lifetime
Patent Citations (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| GB951550A (en) * | 1961-06-21 | 1964-03-04 | Foseco Int | Degassing and deoxidation of copper and copper-base alloys |
| GB1000310A (en) * | 1961-10-12 | 1965-08-04 | Siemens Ag | Improvements relating to the melting and refining of metals |
| JPS52145327A (en) * | 1976-05-31 | 1977-12-03 | Furukawa Metals Co | Copper alloy with anti softening property |
| JPH06212300A (ja) * | 1993-01-14 | 1994-08-02 | Kobe Steel Ltd | シャフト炉を用いたｐ含有低酸素銅の製法 |
| DE19734780C1 (de) * | 1997-08-06 | 1998-12-10 | Mannesmann Ag | Verfahren zur Herstellung von geschweißten Rohren aus Cu und Cu-Legierungen |
Non-Patent Citations (2)
| Title |
|---|
| DATABASE WPI Section Ch Week 197803, Derwent World Patents Index; Class M26, AN 1978-05554A, XP002126577 * |
| PATENT ABSTRACTS OF JAPAN vol. 018, no. 578 (C - 1269) 7 November 1994 (1994-11-07) * |
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN107805722A (zh) * | 2017-12-12 | 2018-03-16 | 芜湖精艺铜业有限公司 | 无氧铜铸造炉 |
| CN115493402A (zh) * | 2022-08-29 | 2022-12-20 | 金川集团股份有限公司 | 一种工频感应炉熔沟凝固和二次起熔的方法 |
| CN116200621A (zh) * | 2023-04-23 | 2023-06-02 | 弋阳县宏田金属制品有限公司 | 一种耐高压脱氧铜管及其制备方法 |
Also Published As
| Publication number | Publication date |
|---|---|
| EP0987338B1 (fr) | 2003-06-25 |
| DE59906069D1 (de) | 2003-07-31 |
| ES2196718T3 (es) | 2003-12-16 |
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