EP3113895A1 - Verfahren und anlage zur kühlung von flüssigkeitsgekühlten kokillen für metallurgische prozesse - Google Patents
Verfahren und anlage zur kühlung von flüssigkeitsgekühlten kokillen für metallurgische prozesseInfo
- Publication number
- EP3113895A1 EP3113895A1 EP15710448.0A EP15710448A EP3113895A1 EP 3113895 A1 EP3113895 A1 EP 3113895A1 EP 15710448 A EP15710448 A EP 15710448A EP 3113895 A1 EP3113895 A1 EP 3113895A1
- Authority
- EP
- European Patent Office
- Prior art keywords
- coolant
- mold
- temperature
- cooling
- water
- 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
- 238000001816 cooling Methods 0.000 title claims abstract description 26
- 238000000034 method Methods 0.000 title claims description 26
- 238000010310 metallurgical process Methods 0.000 title description 2
- 239000002826 coolant Substances 0.000 claims abstract description 42
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 claims abstract description 28
- 238000007711 solidification Methods 0.000 claims abstract description 14
- 230000008023 solidification Effects 0.000 claims abstract description 14
- 229910000831 Steel Inorganic materials 0.000 claims abstract description 13
- 239000007788 liquid Substances 0.000 claims abstract description 13
- 229910052751 metal Inorganic materials 0.000 claims abstract description 13
- 239000002184 metal Substances 0.000 claims abstract description 13
- 239000010959 steel Substances 0.000 claims abstract description 13
- 238000009749 continuous casting Methods 0.000 claims abstract description 12
- 230000005499 meniscus Effects 0.000 claims abstract description 11
- 239000002608 ionic liquid Substances 0.000 claims abstract description 8
- 150000002739 metals Chemical class 0.000 claims abstract description 4
- 229910045601 alloy Inorganic materials 0.000 claims abstract description 3
- 239000000956 alloy Substances 0.000 claims abstract description 3
- RYGMFSIKBFXOCR-UHFFFAOYSA-N Copper Chemical compound [Cu] RYGMFSIKBFXOCR-UHFFFAOYSA-N 0.000 claims description 8
- 229910052802 copper Inorganic materials 0.000 claims description 8
- 239000010949 copper Substances 0.000 claims description 8
- 230000000694 effects Effects 0.000 claims description 7
- 239000002893 slag Substances 0.000 claims description 7
- 238000003860 storage Methods 0.000 claims description 5
- PXHVJJICTQNCMI-UHFFFAOYSA-N Nickel Chemical compound [Ni] PXHVJJICTQNCMI-UHFFFAOYSA-N 0.000 claims description 4
- 230000003111 delayed effect Effects 0.000 claims description 3
- 238000004519 manufacturing process Methods 0.000 claims description 3
- 230000005611 electricity Effects 0.000 claims description 2
- 238000010438 heat treatment Methods 0.000 claims description 2
- 229910052759 nickel Inorganic materials 0.000 claims description 2
- 239000000155 melt Substances 0.000 abstract description 5
- 150000003839 salts Chemical class 0.000 abstract description 5
- 229910001338 liquidmetal Inorganic materials 0.000 description 17
- 239000000498 cooling water Substances 0.000 description 6
- 230000017525 heat dissipation Effects 0.000 description 5
- 230000015572 biosynthetic process Effects 0.000 description 4
- 239000012298 atmosphere Substances 0.000 description 3
- 238000005266 casting Methods 0.000 description 2
- 230000001276 controlling effect Effects 0.000 description 2
- 239000000110 cooling liquid Substances 0.000 description 2
- 230000007547 defect Effects 0.000 description 2
- 230000001105 regulatory effect Effects 0.000 description 2
- 239000002918 waste heat Substances 0.000 description 2
- 229910052782 aluminium Inorganic materials 0.000 description 1
- XAGFODPZIPBFFR-UHFFFAOYSA-N aluminium Chemical compound [Al] XAGFODPZIPBFFR-UHFFFAOYSA-N 0.000 description 1
- 238000013459 approach Methods 0.000 description 1
- 239000000919 ceramic Substances 0.000 description 1
- 229910017052 cobalt Inorganic materials 0.000 description 1
- 239000010941 cobalt Substances 0.000 description 1
- GUTLYIVDDKVIGB-UHFFFAOYSA-N cobalt atom Chemical compound [Co] GUTLYIVDDKVIGB-UHFFFAOYSA-N 0.000 description 1
- 238000010276 construction Methods 0.000 description 1
- 230000001419 dependent effect Effects 0.000 description 1
- 238000010891 electric arc Methods 0.000 description 1
- 230000002349 favourable effect Effects 0.000 description 1
- 239000000463 material Substances 0.000 description 1
- 238000012986 modification Methods 0.000 description 1
- 230000004048 modification Effects 0.000 description 1
- 238000012544 monitoring process Methods 0.000 description 1
- 230000008092 positive effect Effects 0.000 description 1
- 239000000843 powder Substances 0.000 description 1
- 238000012545 processing Methods 0.000 description 1
- 238000011084 recovery Methods 0.000 description 1
- 239000003507 refrigerant Substances 0.000 description 1
- 238000007789 sealing Methods 0.000 description 1
- 239000007787 solid Substances 0.000 description 1
- 239000007921 spray Substances 0.000 description 1
- 238000010313 vacuum arc remelting Methods 0.000 description 1
Classifications
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B22—CASTING; POWDER METALLURGY
- B22D—CASTING OF METALS; CASTING OF OTHER SUBSTANCES BY THE SAME PROCESSES OR DEVICES
- B22D11/00—Continuous casting of metals, i.e. casting in indefinite lengths
- B22D11/04—Continuous casting of metals, i.e. casting in indefinite lengths into open-ended moulds
- B22D11/055—Cooling the moulds
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B22—CASTING; POWDER METALLURGY
- B22D—CASTING OF METALS; CASTING OF OTHER SUBSTANCES BY THE SAME PROCESSES OR DEVICES
- B22D11/00—Continuous casting of metals, i.e. casting in indefinite lengths
- B22D11/16—Controlling or regulating processes or operations
- B22D11/18—Controlling or regulating processes or operations for pouring
- B22D11/181—Controlling or regulating processes or operations for pouring responsive to molten metal level or slag level
- B22D11/182—Controlling or regulating processes or operations for pouring responsive to molten metal level or slag level by measuring temperature
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B22—CASTING; POWDER METALLURGY
- B22D—CASTING OF METALS; CASTING OF OTHER SUBSTANCES BY THE SAME PROCESSES OR DEVICES
- B22D23/00—Casting processes not provided for in groups B22D1/00 - B22D21/00
- B22D23/06—Melting-down metal, e.g. metal particles, in the mould
- B22D23/10—Electroslag casting
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B22—CASTING; POWDER METALLURGY
- B22D—CASTING OF METALS; CASTING OF OTHER SUBSTANCES BY THE SAME PROCESSES OR DEVICES
- B22D45/00—Equipment for casting, not otherwise provided for
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B22—CASTING; POWDER METALLURGY
- B22D—CASTING OF METALS; CASTING OF OTHER SUBSTANCES BY THE SAME PROCESSES OR DEVICES
- B22D7/00—Casting ingots, e.g. from ferrous metals
- B22D7/06—Ingot moulds or their manufacture
- B22D7/064—Cooling the ingot moulds
-
- 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
- C22B9/16—Remelting metals
- C22B9/18—Electroslag remelting
-
- 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
- C22B9/16—Remelting metals
- C22B9/20—Arc remelting
Definitions
- the present invention relates to an improved method for cooling liquid-cooled molds used in continuous casting and remelting plants and for the production of strands or blocks of steels and metals, e.g. Aluminum, copper, nickel and cobalt and their alloys are used. Furthermore, the invention relates to a system for carrying out the method according to the invention.
- the molds used for this purpose usually consist of an alloyed or unalloyed copper insert, which is installed in a so-called "water jacket", usually consisting of a welded steel construction, the heat removal being effected by the cooling water passing through the gap between mold insert and water jacket
- the cooling water must be so large that a vapor bubble formation on the water side of the Kokillendones is avoided.
- plate molds made of copper which either have holes through which the cooling liquid is passed or on the cooling water side have milled grooves that serve as cooling channels and by a screwed steel plate to be sealed.
- Such molds are in use in continuous casting, as well as in plants for remelting self-consuming electrodes either in a hot Slag bath - the electroslag remelting process - or by an arc under vacuum - the vacuum arc remelting process.
- the liquid metal to be cast is poured from a tundish into one or more water-cooled oscillating copper molds.
- the molds used are open at the bottom and can also have a certain conicity.
- a first viable strand shell is formed which is continuously withdrawn from the mold.
- casting powder slags are used.
- an already solidified metal block (self-consumable electrode) is melted in an electrically conductive slag or under vacuum by an electric arc.
- the liquid steel collects in a liquid metal sump, which is located in a water-cooled mold, and solidifies in this to a remelt block.
- remelting can be used on the one hand downwardly open molds (Gleitkokillen) and on the other hand down closed molds (Standkokillen).
- the molds may have a certain conicity.
- the Umschmelzblock is pulled down from the mold by means of a movable bottom plate.
- the molds for continuous casting and remelting are cooled by circulating water of a conventional water cycle, which usually consists of a cooling water storage tank, a pump set and a heat exchanger and valves, valves, measuring and control devices for the purpose of controlling and controlling the water flow.
- Water usually has a comparatively low operating temperature.
- a maximum flow temperature of 50-60 ° C at a temperature difference between the cooling water supply and return temperature ( ⁇ ) of about 10 ° C can be mentioned here.
- This low temperature of the water leads to a strong cooling effect due to the self-adjusting high temperature gradient between steel and mold inner wall. This strong cooling effect can lead to a solidification of the meniscus of the liquid steel at the boundary line liquid metal and atmosphere or slag.
- One way in which the method according to the invention is aimed is, for example, to carry out the cooling water circuit of the mold as a pressure circuit.
- the water temperature can be increased up to 180 ° C, which corresponds to a water pressure of about 1 1 - 14 bar.
- This approach requires a technical control of the pressure circuit, whereby safety aspects must also be considered.
- Another solution which is simpler compared to a pressurized water circuit, is to cool the mold with liquid metal or salt melts, which can be operated in a pressure range comparable to the conventional water cycle.
- the only modification here relates to the sealing rings of the existing molds, which must be suitable for use at higher temperatures. Salt melts suitable for this purpose are also referred to in the literature as ionic liquids.
- Ionic liquids are characterized in that they are liquid in a temperature range between room temperature and 600 ° C, preferably between room temperature and 300 ° C, without requiring an increase in pressure is necessary.
- all ionic liquids known per se can be used. Types and production methods of ionic liquids can be found in WO 2005/021484, WO 2008/052860, WO 2008/052863 and WO 2013/1 13461.
- the cooling of the mold is carried out indirectly as in the prior art water cooling, that is, the cooling medium does not come into direct contact with the liquid to be cast metal.
- the dissipated heat is removed or recovered via a heat exchanger, so that a constant inlet temperature of the coolant can be ensured. Due to the very high difference between the inlet and outlet temperature of the cooling medium, a very large amount of waste heat is released, which would escape completely or partially into the atmosphere. By using a heat exchanger, this recovered heat can be fed into a heating circuit. Furthermore, by a heat exchanger subsequent suitable unit also this waste heat for steam and subsequently be used to generate electricity.
- Another advantage of using liquid metal or molten salts is that, in the case of damage to the mold, there is no reaction of the refrigerant with the liquid metal to be poured or remelted.
- the essential effect of the process according to the invention is that a positive effect on the quality of the strand or remelt block is achieved by the use of water under elevated pressure or of liquid metal melts or ionic liquids. Due to the higher temperature of these cooling media, the initial solidification of the metal is delayed so that it begins only below the meniscus area.
- a method for cooling liquid-cooled usually consisting of copper molds for continuous casting or remelting self-consuming electrodes of steels or metals, in which the cooling effect of the coolant used is greatly reduced compared to water, so that the primary solidification of the liquid metal is delayed and takes place only below the meniscus in contact with the mold wall.
- the flow rate of the coolant is set at inlet temperatures of room temperature, but also considerably higher, so that an outlet temperature of the coolant of over 80 ° C is reached.
- the temperature difference between the coolant inlet and outlet may be between 5 ° C and a maximum of 150 ° C to achieve the purpose of the invention.
- an inlet temperature of the coolant between 60 ° C and 100 ° C is preferably selected and set the outlet temperature at temperature differences between 40 ° C and 100 ° C at 100 ° C to 200 ° C.
- basically pressurized water can be used. That's it necessary to adjust the pressure in the circuit so that formation of vapor bubbles in contact with the mold wall is prevented.
- molten metal which are liquid below 100 ° C.
- a particularly favorable solution is the use of ionic liquids with and without water content, which are liquid above room temperature and up to at least 200 ° C.
- a defined control of the temperature difference between inlet and outlet of the coolant in the range of at least 5 ° C and a maximum of 150 ° C is required. It is essential here to maintain the respectively selected or desired temperature difference at a defined coolant inlet temperature which can be maintained by re-cooling the coolant in a heat exchanger.
- a suitable for carrying out the method according to the invention cooling circuit has a storage tank as a reservoir for the coolant and a circulation pump, by means of which the coolant is conveyed by the continuous casting or Umschmelzkokille and a heat exchanger, and corresponding valves and measuring devices for monitoring and control.
- the cooling circuit can be designed both open, so that the storage tank is at atmospheric pressure or closed with a pressurized storage tank.
- a closed cooling circuit for carrying out the method according to the invention is shown schematically with a mold 1, which can be designed as a sliding or standing mold for the continuous casting or remelting process.
- the coolant enters the mold 1 via the inlet 2 at a temperature T 1 which is in the range between room temperature and 300 ° C.
- T 1 which is in the range between room temperature and 300 ° C.
- T2 T1 + ⁇
- the heat released via a heat exchanger 4 amount of heat can be used subsequently for a recovery of thermal energy.
- a collecting container 5 and a pump 6 the coolant is passed back into the mold 1.
Landscapes
- Engineering & Computer Science (AREA)
- Mechanical Engineering (AREA)
- Chemical & Material Sciences (AREA)
- Manufacturing & Machinery (AREA)
- Materials Engineering (AREA)
- Metallurgy (AREA)
- Organic Chemistry (AREA)
- Physics & Mathematics (AREA)
- Plasma & Fusion (AREA)
- Molds, Cores, And Manufacturing Methods Thereof (AREA)
- Continuous Casting (AREA)
Abstract
Description
Claims
Applications Claiming Priority (2)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
ATA161/2014A AT515566A1 (de) | 2014-03-06 | 2014-03-06 | Verfahren zur Kühlung von flüssigkeitsgekühlten Kokillen für metallurgische Prozesse |
PCT/EP2015/054369 WO2015132237A1 (de) | 2014-03-06 | 2015-03-03 | Verfahren und anlage zur kühlung von flüssigkeitsgekühlten kokillen für metallurgische prozesse |
Publications (2)
Publication Number | Publication Date |
---|---|
EP3113895A1 true EP3113895A1 (de) | 2017-01-11 |
EP3113895B1 EP3113895B1 (de) | 2019-07-03 |
Family
ID=52686333
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
EP15710448.0A Active EP3113895B1 (de) | 2014-03-06 | 2015-03-03 | Verfahren und anlage zur kühlung von flüssigkeitsgekühlten kokillen für metallurgische prozesse |
Country Status (4)
Country | Link |
---|---|
EP (1) | EP3113895B1 (de) |
AT (1) | AT515566A1 (de) |
ES (1) | ES2747801T3 (de) |
WO (1) | WO2015132237A1 (de) |
Cited By (1)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
CN108031806A (zh) * | 2017-10-17 | 2018-05-15 | 襄阳远锐资源工程技术有限公司 | 一种铅锭浇铸装置及浇铸方法 |
Families Citing this family (1)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
CN114799105A (zh) * | 2022-05-06 | 2022-07-29 | 山东钢铁股份有限公司 | 一种结晶器钢水辅助冷却装置及使用方法 |
Family Cites Families (17)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
US3157919A (en) * | 1960-05-13 | 1964-11-24 | Firth Sterling Inc | Apparatus for producing improved ingot metal |
AT308302B (de) * | 1970-12-16 | 1973-06-25 | Voest Ag | Vorrichtung zum Kühlen einer Stranggießkokille |
JPS57187151A (en) * | 1981-05-13 | 1982-11-17 | Nippon Steel Corp | Cooler for continuously cast ingot |
JPH06277804A (ja) * | 1993-03-26 | 1994-10-04 | Sumitomo Metal Ind Ltd | 連続鋳造用鋳型の冷却方法 |
DE19728098A1 (de) * | 1997-07-02 | 1999-01-07 | Inteco Int Techn Beratung | Trichterkokille mit trichterförmigem Einsatzrohr für das Elektroschlackeumschmelzen sowie Verfahren dazu |
JP2000210758A (ja) * | 1999-01-26 | 2000-08-02 | Kawasaki Steel Corp | 連続鋳造方法および連続鋳造用鋳型 |
AT410413B (de) * | 2000-11-14 | 2003-04-25 | Inteco Int Techn Beratung | Verfahren zum elektroschlacke umschmelzen von metallen |
TWI268821B (en) * | 2002-04-27 | 2006-12-21 | Sms Demag Ag | Adjustment of heat transfer in continuous casting molds in particular in the region of the meniscus |
EP1452252A1 (de) | 2003-02-28 | 2004-09-01 | Hubert Dipl.-Ing. Sommerhofer | Verfahren zum Stranggiessen |
DE10308982B3 (de) * | 2003-03-01 | 2004-03-04 | Ald Vacuum Technologies Ag | Verfahren und Vorrichtung zum Ausgleich der im Schmelzraum und im Kühlwassersystem herrschenden Drücke bei einer Sonderschmelzanlage |
WO2005021484A2 (de) | 2003-08-27 | 2005-03-10 | Proionic Production Of Ionic Substances Gmbh & Co Keg | Verfahren zur herstellung ionischer flüssigkeiten, ionischer feststoffe oder gemische derselben |
DE102006002355A1 (de) * | 2006-01-11 | 2007-07-12 | Hartmut Ricken | Vorrichtung und Verfahren zur thermischen Koppelung zwischen Kokille und Kühler während des Stranggießens |
ES2527722T3 (es) | 2006-10-10 | 2015-01-28 | Proionic Gmbh & Co Kg | Método para reaccionar 2-carboxilatos 1,3-heteroaromáticos con agua |
DE502007005080D1 (de) | 2006-10-10 | 2010-10-28 | Proionic Production Of Ionic S | Verfahren zur herstellung quarternärer carbonate |
AT509894A1 (de) * | 2010-06-01 | 2011-12-15 | Siemens Vai Metals Tech Gmbh | Verfahren und vorrichtung zur erzeugung von überhitztem sattdampf in einer stranggiessmaschine |
CH705326A2 (de) * | 2011-07-22 | 2013-01-31 | Heinrich Marti | Verfahren zur Nutzung von Wärmeenergien, vorzugsweise bei einer Stranggiessanlage. |
PE20142105A1 (es) | 2012-02-02 | 2014-12-20 | Vtu Holding Gmbh | Liquidos ionicos para enfriamiento en entornos de alta temperatura |
-
2014
- 2014-03-06 AT ATA161/2014A patent/AT515566A1/de not_active Application Discontinuation
-
2015
- 2015-03-03 ES ES15710448T patent/ES2747801T3/es active Active
- 2015-03-03 WO PCT/EP2015/054369 patent/WO2015132237A1/de active Application Filing
- 2015-03-03 EP EP15710448.0A patent/EP3113895B1/de active Active
Cited By (1)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
CN108031806A (zh) * | 2017-10-17 | 2018-05-15 | 襄阳远锐资源工程技术有限公司 | 一种铅锭浇铸装置及浇铸方法 |
Also Published As
Publication number | Publication date |
---|---|
AT515566A1 (de) | 2015-10-15 |
ES2747801T3 (es) | 2020-03-11 |
EP3113895B1 (de) | 2019-07-03 |
WO2015132237A1 (de) | 2015-09-11 |
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