EP1128920A1 - Verfahren und einrichtung zur regulierung von giessstrahlen - Google Patents
Verfahren und einrichtung zur regulierung von giessstrahlenInfo
- Publication number
- EP1128920A1 EP1128920A1 EP99955923A EP99955923A EP1128920A1 EP 1128920 A1 EP1128920 A1 EP 1128920A1 EP 99955923 A EP99955923 A EP 99955923A EP 99955923 A EP99955923 A EP 99955923A EP 1128920 A1 EP1128920 A1 EP 1128920A1
- Authority
- EP
- European Patent Office
- Prior art keywords
- chamber
- gas
- pouring jet
- pouring
- constriction
- 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
- 230000001105 regulatory effect Effects 0.000 title claims abstract description 24
- 238000000034 method Methods 0.000 title claims abstract description 21
- 239000007789 gas Substances 0.000 claims description 64
- 239000002918 waste heat Substances 0.000 claims description 8
- 229910000831 Steel Inorganic materials 0.000 claims description 7
- 239000010959 steel Substances 0.000 claims description 7
- 238000004519 manufacturing process Methods 0.000 claims description 6
- XKRFYHLGVUSROY-UHFFFAOYSA-N Argon Chemical compound [Ar] XKRFYHLGVUSROY-UHFFFAOYSA-N 0.000 claims description 4
- 239000000919 ceramic Substances 0.000 claims description 3
- 239000002184 metal Substances 0.000 claims description 3
- 229910052786 argon Inorganic materials 0.000 claims description 2
- 239000000463 material Substances 0.000 claims description 2
- 229910052756 noble gas Inorganic materials 0.000 claims 1
- 238000009628 steelmaking Methods 0.000 abstract 1
- 239000007788 liquid Substances 0.000 description 11
- IJGRMHOSHXDMSA-UHFFFAOYSA-N Atomic nitrogen Chemical compound N#N IJGRMHOSHXDMSA-UHFFFAOYSA-N 0.000 description 4
- 230000003068 static effect Effects 0.000 description 4
- 238000009434 installation Methods 0.000 description 3
- 238000009749 continuous casting Methods 0.000 description 2
- 229910052757 nitrogen Inorganic materials 0.000 description 2
- 238000005266 casting Methods 0.000 description 1
- 238000002474 experimental method Methods 0.000 description 1
- 238000010438 heat treatment Methods 0.000 description 1
- 239000011261 inert gas Substances 0.000 description 1
- 230000001681 protective effect Effects 0.000 description 1
- 238000003860 storage 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
- B22D37/00—Controlling or regulating the pouring of molten metal from a casting melt-holding vessel
- B22D37/005—Shielding the molten metal stream
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B22—CASTING; POWDER METALLURGY
- B22D—CASTING OF METALS; CASTING OF OTHER SUBSTANCES BY THE SAME PROCESSES OR DEVICES
- B22D41/00—Casting melt-holding vessels, e.g. ladles, tundishes, cups or the like
- B22D41/14—Closures
Definitions
- the invention relates to a method and a device for regulating pouring jets in steel production.
- the methods and devices known in steel production for regulating the metallic pouring stream flowing from a ladle or other storage container into the processing installation, such as, for example, in the tundish of a continuous casting installation, are carried out using mechanical means, such as, for example, slides or plugs, through which the mass flow of the pouring jet * regulated until it is completely closed off.
- the object of the invention is therefore to provide an economical method and a simple device for optimally regulating the flow rate of pouring streams in steel production.
- This object is achieved with the method according to the invention in that the mass flow of the pouring jet is regulated by a gas.
- the gas for example an inert gas such as argon, a protective gas such as nitrogen or a gas in the form of an evaporated liquid
- a gas connection in the double wall of the concentric gas heater and then into the double wall of the concentric chamber connected to the gas heater.
- the gas enters the interior of the chamber through the inflow openings of the double wall, in which it is evenly distributed through a chamber forming and flows an annular gap to the pouring stream, concentric constriction and then discharged to the outside through a lower outflow opening of the gas heater.
- the amount of gas used is advantageously selected so that a pressure arises in the chamber which counteracts the pouring jet flowing out of the outflow opening of the container and thus has a regulating effect on its outflow amount.
- the relevant gas back pressure is essentially determined by the amount of gas used per unit of time, the size of the annular gap area and the geometry of the constriction forming the chamber floor.
- the pouring jet outflow quantity from the outflow opening of the container is known to depend on the geometry of the outflow opening of the container and the static pressure of the material contained therein.
- the static liquid pressure corresponds to the height of the liquid level above the outlet opening in the container, that is to say generally the bath height.
- the gas volume flow can thus be regulated via the gas input quantity.
- the gas back pressure acting on the pouring jet flowing out of the container in the region of the outflow opening counteracts the static pouring jet liquid pressure.
- the amount of liquid flowing out of the outflow opening of the container can thus be regulated simply and effectively by the amount of gas used in a range of a full pouring stream quantity flow in the absence of gas counterpressure until the pouring jet flows back into the container at a gas backpressure exceeding the static liquid pressure.
- the gas heater is only to be understood as an option to improve the economics of the process, which can be dispensed with in unfavorable conditions, such as unfavorable installation conditions.
- the gas flowing directly into the double wall of the concentric chamber in this case is then also heated by the waste heat of the pouring jet flowing out of the outlet opening of the container until it flows into the interior of the chamber.
- the device characterized in that the container having the outflow opening is connected to the concentric chamber having the concentric constriction is used with particular advantage.
- the double-walled concentric chamber is connected to the concentric, double-walled gas heater in such a way that the gas flowing through the double wall of the gas heater and then through the double wall of the chamber via inflow openings in the chamber wall into the chamber interior in the double wall of the gas heater and the chamber is preheated by the waste heat of the pouring jet with the advantages already shown.
- the coolable and heatable made of ceramic or metal and gas-tightly connected to the container and enclosing the pouring jet only in a partial area, ensures a uniform gas introduction and has as the chamber bottom the concentric constriction forming the annular gap with the pouring jet.
- the narrowing of the chamber is designed in such a way that the highest possible flow resistance in the gas and thus a high gas back pressure in the region of the outflow opening of the container is ensured.
- a design of the constriction as a pointed edge has proven to be advantageous.
- the device according to the invention can also be used without a gas heat exchanger designed according to the available length of the pouring jet.
- the practical advantageous applicability of the invention was demonstrated by an experiment in which the sharp-edged chamber constriction forming an annular gap with a diameter of 20 mm was subjected to a gaseous nitrogen quantity of 150 m3 / h. A liquid with a diameter of 10 mm, hydraulically similar to the liquid steel, was used as the pouring stream. Due to the selected parameters, a gas back pressure of up to 0.5 bar was achieved in the area below the outflow opening of the container, which corresponds to a change in the bath level height of 0.7 m.
- pouring systems can be adapted in their casting performance to the respective requirements of the downstream system, for example a continuous casting system.
- the subject matter of the invention is not only limited to the regulation of metallic liquids in steel production. It can also be used to regulate the mass flow of liquid jets of different types, for example also particularly advantageously for regulating the mass flow of aggressive liquids.
- the pouring jet 3 enclosing, concentric and Double-walled chamber 4 has a concentric constriction 6, which forms the chamber bottom and is formed as a pointed edge, which in turn forms an annular gap 7 with the pouring jet 3, and is provided with inflow openings 8 opening into the interior of the chamber 4.
- the concentric gas heater 5 connected to the chamber 4 is in one of its
- Double wall opening located at the lower end of the gas connection 9 and provided with a bottom-side outflow opening 10.
- the gas flowing through the entry opening 9 into the double wall of the gas heater 5 and heated by the waste heat of the pouring jet 3 as it flows through it continues to flow through the double wall of the chamber 4 with further heating through the waste heat of the pouring jet 3 and then through the inflow openings opening into the chamber interior 8 evenly distributed into the interior of the chamber 4 surrounding the pouring jet 3 flowing out of the outlet opening 2 of the container 1.
- the preheated gas flowing into the interior of the chamber 4 is further heated by the waste heat of the pouring jet 3 flowing into the chamber 4 from the outlet opening 2 and then flows through the annular gap 7 formed in the area of the constriction 6 into the gas heater 5 and is discharged to the outside through the tube forming the inner wall of the gas heater 5 with the outlet opening 10 on the underside.
Landscapes
- Engineering & Computer Science (AREA)
- Mechanical Engineering (AREA)
- Continuous Casting (AREA)
- Casting Support Devices, Ladles, And Melt Control Thereby (AREA)
- Furnace Charging Or Discharging (AREA)
- Discharge Heating (AREA)
- Crystals, And After-Treatments Of Crystals (AREA)
- Superconductors And Manufacturing Methods Therefor (AREA)
Description
Claims
Applications Claiming Priority (3)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| DE19852289A DE19852289A1 (de) | 1998-11-13 | 1998-11-13 | Verfahren und Einrichtung zur Regulierung von Gießstrahlen |
| DE19852289 | 1998-11-13 | ||
| PCT/EP1999/008285 WO2000029147A1 (de) | 1998-11-13 | 1999-10-30 | Verfahren und einrichtung zur regulierung von giessstrahlen |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| EP1128920A1 true EP1128920A1 (de) | 2001-09-05 |
| EP1128920B1 EP1128920B1 (de) | 2003-03-05 |
Family
ID=7887630
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| EP99955923A Expired - Lifetime EP1128920B1 (de) | 1998-11-13 | 1999-10-30 | Verfahren und einrichtung zur regulierung von giessstrahlen |
Country Status (6)
| Country | Link |
|---|---|
| EP (1) | EP1128920B1 (de) |
| AT (1) | ATE233624T1 (de) |
| DE (2) | DE19852289A1 (de) |
| ES (1) | ES2194524T3 (de) |
| PT (1) | PT1128920E (de) |
| WO (1) | WO2000029147A1 (de) |
Family Cites Families (7)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| GB2094454B (en) * | 1981-03-03 | 1984-09-19 | Flogates Ltd | Improvements in the pouring of molten metals |
| US4424955A (en) * | 1981-10-05 | 1984-01-10 | Korf Technologies, Inc. | Apparatus for treating liquid metal in a vessel |
| JPS5861954A (ja) * | 1981-10-09 | 1983-04-13 | Mitsubishi Heavy Ind Ltd | 密閉型連続鋳造設備 |
| IT1176428B (it) * | 1984-07-18 | 1987-08-18 | Radex Italiana Spa | Manicotto di uscita in un dispositivo per controllare l'efflusso di acciaio fuso da una siviera o da una paniera |
| DE3444512C2 (de) * | 1984-12-06 | 1987-03-19 | Klöckner-Werke AG, 4100 Duisburg | Verfahren und Vorrichtung zum Einblasen mindestens eines Gases oder mindestens eines in einem Gas suspendierten Feststoffes in eine in einem metallurgischen Gefäß befindliche metallische Schmelze, insbesondere in eine unter Vakuum stehende Stahlschmelze |
| GB8910136D0 (en) * | 1989-05-03 | 1989-06-21 | British Steel Plc | Controlling teeming streams |
| DE3917403C2 (de) * | 1989-05-29 | 1998-02-05 | Zimmermann & Jansen Gmbh | Verfahren und Vorrichtung zum Füllen einer Stranggießkokille mit metallischer Schmelze |
-
1998
- 1998-11-13 DE DE19852289A patent/DE19852289A1/de not_active Ceased
-
1999
- 1999-10-30 PT PT99955923T patent/PT1128920E/pt unknown
- 1999-10-30 AT AT99955923T patent/ATE233624T1/de not_active IP Right Cessation
- 1999-10-30 EP EP99955923A patent/EP1128920B1/de not_active Expired - Lifetime
- 1999-10-30 WO PCT/EP1999/008285 patent/WO2000029147A1/de not_active Ceased
- 1999-10-30 ES ES99955923T patent/ES2194524T3/es not_active Expired - Lifetime
- 1999-10-30 DE DE59904485T patent/DE59904485D1/de not_active Expired - Lifetime
Non-Patent Citations (1)
| Title |
|---|
| See references of WO0029147A1 * |
Also Published As
| Publication number | Publication date |
|---|---|
| DE59904485D1 (de) | 2003-04-10 |
| DE19852289A1 (de) | 2000-05-25 |
| EP1128920B1 (de) | 2003-03-05 |
| ATE233624T1 (de) | 2003-03-15 |
| WO2000029147A1 (de) | 2000-05-25 |
| ES2194524T3 (es) | 2003-11-16 |
| PT1128920E (pt) | 2003-07-31 |
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