US20120055958A1 - Bottom pouring nozzle for use in a container for metal melts - Google Patents
Bottom pouring nozzle for use in a container for metal melts Download PDFInfo
- Publication number
- US20120055958A1 US20120055958A1 US13/319,720 US201013319720A US2012055958A1 US 20120055958 A1 US20120055958 A1 US 20120055958A1 US 201013319720 A US201013319720 A US 201013319720A US 2012055958 A1 US2012055958 A1 US 2012055958A1
- Authority
- US
- United States
- Prior art keywords
- pouring nozzle
- pressure
- mbar
- pouring
- metal melts
- 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.)
- Abandoned
Links
- 229910052751 metal Inorganic materials 0.000 title claims abstract description 19
- 239000002184 metal Substances 0.000 title claims abstract description 19
- 239000000155 melt Substances 0.000 title claims abstract description 15
- 238000000034 method Methods 0.000 claims description 10
- 229910000831 Steel Inorganic materials 0.000 description 6
- 239000010959 steel Substances 0.000 description 6
- 239000000463 material Substances 0.000 description 5
- 239000000161 steel melt Substances 0.000 description 4
- 239000007789 gas Substances 0.000 description 3
- 230000009467 reduction Effects 0.000 description 3
- 238000011109 contamination Methods 0.000 description 2
- 239000004575 stone Substances 0.000 description 2
- AZDRQVAHHNSJOQ-UHFFFAOYSA-N alumane Chemical class [AlH3] AZDRQVAHHNSJOQ-UHFFFAOYSA-N 0.000 description 1
- QVGXLLKOCUKJST-UHFFFAOYSA-N atomic oxygen Chemical compound [O] QVGXLLKOCUKJST-UHFFFAOYSA-N 0.000 description 1
- 238000010276 construction Methods 0.000 description 1
- 230000007423 decrease Effects 0.000 description 1
- 230000000694 effects Effects 0.000 description 1
- 239000011261 inert gas Substances 0.000 description 1
- 238000009434 installation Methods 0.000 description 1
- 238000009413 insulation Methods 0.000 description 1
- 230000001788 irregular Effects 0.000 description 1
- 238000012986 modification Methods 0.000 description 1
- 230000004048 modification Effects 0.000 description 1
- 229910052760 oxygen Inorganic materials 0.000 description 1
- 239000001301 oxygen Substances 0.000 description 1
- 230000002265 prevention Effects 0.000 description 1
- 238000005086 pumping Methods 0.000 description 1
- 238000007789 sealing Methods 0.000 description 1
- 239000002893 slag Substances 0.000 description 1
- 239000000126 substance Substances 0.000 description 1
Images
Classifications
-
- 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
- B22D41/50—Pouring-nozzles
- B22D41/502—Connection arrangements; Sealing means therefor
-
- 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
- B22D41/50—Pouring-nozzles
Landscapes
- Engineering & Computer Science (AREA)
- Mechanical Engineering (AREA)
- Casting Support Devices, Ladles, And Melt Control Thereby (AREA)
- Structures Of Non-Positive Displacement Pumps (AREA)
- Furnace Charging Or Discharging (AREA)
- Structure Of Emergency Protection For Nuclear Reactors (AREA)
Abstract
A pouring nozzle is provided for use in a container for metal melts. The pouring nozzle has an inner wall surrounding a through-flow opening for metal melts and an outer housing. During operation of the pouring nozzle a pressure of at maximum 500 mbar exists between the inner wall and the outer housing.
Description
- This application is a Section 371 of International Application No. PCT/EP2010/002443, filed Apr. 21, 2010, which was published in the German language on Nov. 18, 2010, under International Publication No. WO 2010/130330 A1 and the disclosure of which is incorporated herein by reference.
- The invention relates to a bottom pouring nozzle for use in a container for metal melts, having an inner wall surrounding a through-flow opening for metal melts, and an outer housing. Further, the invention relates to a method for operating the pouring nozzle, and to a pouring device for metal melts.
- Such a pouring nozzle is well known in the prior art. For example, in Korean patent application publication no. KR 2003-0054769 the construction and operation of such a pouring nozzle are described. To prevent interruptions in the operation of the pouring nozzle, the pressure within the material of the pouring nozzle should be slightly reduced. Such pressure reductions of minus 1000 to minus 1300 mm H2O, in fact, are found in typical pouring nozzles of pouring equipment in the steel industry. They correspond to an absolute pressure of about 885 mbar to 915 mbar. In practice, it has been shown that with such resulting pressure decreases, which are almost inevitable, possibly due to the Venturi effect of the flowing metal melt, the problem of adhering of through-flowing material (so-called clogging) is eliminated only insufficiently. The adhering leads to a reduction in the diameter of the pouring nozzle, to a constantly changing flow rate, and thus to quality-lowering turbulences and gas entrapment in the metal melt.
- Further pouring nozzles are known, for example, from German published
patent application DE 10 2004 057 381 A1. Here, the attempt is made to avoid the problem of adhering (clogging) with the help of controlled inert gas addition or by complete sealing of the entire pouring nozzle and associated prevention of oxygen entrance through the wall of the pouring nozzle into the steel melt. - German Patent DE 198 47 271 C1 describes a method in which the described adhering should be avoided by adding particular slag formers to the molten steel. Here, foreign substances are thus introduced into the molten steel. The adherences are described as aluminum compounds forming in the molten steel.
- The object of the present invention is to provide a pouring nozzle which is improved in terms of adhering of material during through-flow and, at the same time, is largely simplified.
- The object is achieved by a pouring nozzle for use in a container for metal melts, having an inner wall surrounding a through-flow opening for metal melts and an outer housing, wherein during operation of the pouring nozzle a pressure of at maximum 500 mbar exists between the inner wall and the outer housing. The object is further achieved by a method of operating the pouring nozzle for a metallurgical vessel having an inner wall surrounding a through-flow opening for metal melts and an outer housing, wherein during operation of the pouring nozzle a pressure of at maximum 500 mbar exists between the inner wall and the outer housing.
- Surprisingly, it has been found that, even without a complete insulation of the pouring nozzle, the problem of adhering can be solved for the most part in that during operation of the pouring nozzle a pressure of at maximum 500 mbar exists between its inner wall and its outer housing. Preferably, the pressure is at maximum 400 mbar, in particular at maximum 300 mbar. Advantageously, to avoid clogging, the pressure ranges from 100 to 400 mbar, preferably from 250 to 300 mbar. Obviously, at such low pressure, a gas entrance into the through-flow opening of the pouring nozzle is effectively avoided, so that there is virtually no adhering of material on the wall of the through-flow opening while the material is flowing through. In addition, there is no gas contamination of the metal melt flowing through, in particular no contamination of a steel melt. The pouring rate is not lowered, turbulences in the melt are reduced. The required negative pressure can be generated preferably by conventional pumps.
- Furthermore, according to the invention, a pouring device is equipped with a container for metal melts having a pouring nozzle, as described above, arranged in a wall, in particular in the floor (bottom) of the container.
- The pouring nozzle may be equipped with an upper and a lower nozzle. The upper nozzle may be arranged directly in the wall of a pouring apparatus, while the lower nozzle is arranged below it. Between the two nozzles a slide valve, known in principle, may be arranged with whose help the through-flow opening can be opened or closed to regulate the flow of the metal melt.
- Instead of a slide valve, a stopper rod can also be used in a known manner. By operation of the pouring nozzle is to be understood its operating state, that is, the state that exists during the through-flow of the metal melt. The pouring nozzle is preferably used for steel melts.
- The foregoing summary, as well as the following detailed description of the invention, will be better understood when read in conjunction with the appended drawings. For the purpose of illustrating the invention, there are shown in the drawings embodiments which are presently preferred. It should be understood, however, that the invention is not limited to the precise arrangements and instrumentalities shown. In the drawings:
-
FIG. 1 is a side sectional view of a pouring device having a pouring nozzle according to one embodiment of the invention; and -
FIG. 2 is a side sectional view of a conventional pouring device having a bottom pouring nozzle. - The
pouring device 1 shown inFIG. 1 is, for example, a distributor of steel melts, in whose bottom apouring nozzle 2 is arranged. Thepouring nozzle 2 is inserted with itsupper part 3 intoseating stone 4, which is arranged inlining 5 of the distributor. Below theupper part 3 is arranged a so-calledslide valve 6, by which through-flow opening 7 of thepouring nozzle 2 can be closed or opened. Theslide valve 6 can be configured in a known manner. It is equipped with apush rod 8, which regulates the closure and which is guided in a sealed manner through theouter housing 9 of thepouring nozzle 2. Theouter housing 9 surrounds theslide valve 8 and lies at its lower part sealed against thelower part 10 of thepouring nozzle 2. At itsupper part housing 9 extends around theupper part 3 of thepouring nozzle 2, lies densely against the upper 3, and is surrounded on the outside byseating stone 4. Thelower part 10 of thepouring nozzle 2 is arranged below theslide valve 6. It extends intomold 11. A vacuum pump is connected to anadjustable pump valve 12, by which the pressure between theouter housing 9 and theinner wall 13 bordering the through-flow opening 7 is lowered to a value of about 250 mbar. The pressure is measured in the pumping section. - Surprisingly, contrary to many experiences in current practice, it was found that no significant adhering on the inside of through-
flow opening 7 could be found in thepouring nozzle 2 of the invention, even when the pressure is lowered to about 500 mbar. -
FIG. 2 shows a pouring device without a significant reduction in pressure, which is generally similar to the arrangement shown inFIG. 1 , but in which no pressure-reducing measures, in particular no housing and no vacuum pump, are present. This installation is operated at atmospheric pressure, thus at a pressure of about 1000 mbar. - It has been found that, in the arrangement shown schematically in
FIG. 2 , the describedbuildup 14 is formed in the interior of thelower part 10 of pouringnozzle 2, leading to irregular and constantly changing through-flow of molten steel. As a result, turbulences are generated, which can affect the quality of steel. - It will be appreciated by those skilled in the art that changes could be made to the embodiments described above without departing from the broad inventive concept thereof. It is understood, therefore, that this invention is not limited to the particular embodiments disclosed, but it is intended to cover modifications within the spirit and scope of the present invention as defined by the appended claims.
Claims (14)
1.-9. (canceled)
10. A pouring nozzle for use in a container for metal melts, the pouring nozzle comprising an inner wall surrounding a through-flow opening for metal melts and an outer housing, wherein during operation of the pouring nozzle a pressure of at maximum 500 mbar exists between the inner wall and the outer housing.
11. The pouring nozzle according to claim 10 , wherein the pressure is at maximum 400 mbar.
12. The pouring nozzle according to claim 10 , wherein the pressure at maximum 300 mbar.
13. The pouring nozzle according to claim 10 , wherein the pressure is 100 to 400 mbar.
14. The pouring nozzle according to claim 10 , wherein the pressure is 250 to 300 mbar.
15. The pouring nozzle according to claim 10 , further comprising a pump for generating the pressure.
16. A pouring device having a container for metal melts, wherein the pouring nozzle according to claim 10 is arranged in a wall of the container.
17. A method of operating a pouring nozzle for a metallurgical vessel having an inner wall surrounding a through-flow opening for metal melts and an outer housing, the method comprising operating the pouring nozzle by generating a pressure of at maximum 500 mbar between the inner wall and the outer housing.
18. The method according to claim 17 , wherein the pressure is generated at a maximum 400 mbar.
19. The method according to claim 17 , wherein the pressure is generated at a maximum 300 mbar.
20. The method according to claim 17 , wherein the pressure is generated at 100 to 400 mbar.
21. The method according to claim 17 , wherein the pressure is generated at 250 to 300 mbar.
22. The method according to claim 17 , wherein the pressure is generated with help of a pump.
Applications Claiming Priority (3)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
DE102009020990.5 | 2009-05-12 | ||
DE102009020990A DE102009020990A1 (en) | 2009-05-12 | 2009-05-12 | Floor spout for use in a container for molten metal |
PCT/EP2010/002443 WO2010130330A1 (en) | 2009-05-12 | 2010-04-21 | Method for operating a floor drain for use in a tank for metal melts |
Publications (1)
Publication Number | Publication Date |
---|---|
US20120055958A1 true US20120055958A1 (en) | 2012-03-08 |
Family
ID=42556918
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
US13/319,720 Abandoned US20120055958A1 (en) | 2009-05-12 | 2010-04-21 | Bottom pouring nozzle for use in a container for metal melts |
Country Status (11)
Country | Link |
---|---|
US (1) | US20120055958A1 (en) |
EP (1) | EP2429743A1 (en) |
JP (1) | JP2012526659A (en) |
KR (1) | KR20120027323A (en) |
CN (1) | CN102421552A (en) |
BR (1) | BRPI1013506A2 (en) |
DE (1) | DE102009020990A1 (en) |
MX (1) | MX2011011987A (en) |
RU (1) | RU2011150270A (en) |
WO (1) | WO2010130330A1 (en) |
ZA (1) | ZA201108253B (en) |
Cited By (1)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
US20130233899A1 (en) * | 2010-11-11 | 2013-09-12 | Rhi Ag | Discharge nozzle for installation inside the base of a metallurgical vessel |
Families Citing this family (1)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
CN114619006A (en) * | 2022-02-14 | 2022-06-14 | 包头钢铁(集团)有限责任公司 | Method for controlling inclusions in pipeline steel during ladle replacement |
Family Cites Families (9)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
JPS613653A (en) * | 1984-06-15 | 1986-01-09 | Kawasaki Steel Corp | Sliding nozzle device having sealing mechanism |
JPH03281045A (en) * | 1990-03-29 | 1991-12-11 | Kurosaki Refract Co Ltd | Sliding nozzle device having sealing mechanism |
JP2551941Y2 (en) * | 1991-01-11 | 1997-10-27 | 住友金属工業株式会社 | Closed sliding nozzle |
JPH05138335A (en) * | 1991-07-12 | 1993-06-01 | Shinagawa Refract Co Ltd | Sealing mechanism and/or gas blowing or evacuating mechanism in cartridge slide valve device |
JPH05185191A (en) * | 1992-01-10 | 1993-07-27 | Kobe Steel Ltd | Method for pouring molten metal into casting mold from tundish and structure of pouring nozzle |
JP3484820B2 (en) * | 1995-04-20 | 2004-01-06 | 大同特殊鋼株式会社 | Continuous casting of free-cutting steel |
DE19847271C1 (en) | 1998-10-07 | 2000-05-04 | Mannesmann Ag | Process for the production of steel with a carbon content equal to or less than 0.9 percent by weight and an Si content of 0.15-1.0 percent by weight |
KR20030054769A (en) | 2001-12-26 | 2003-07-02 | 주식회사 포스코 | A continuously casting method for low air inclusions in slab |
DE102004057381A1 (en) | 2004-11-26 | 2006-06-01 | Heraeus Electro-Nite International N.V. | Method for controlling the flow and bottom outlet for a metallurgical vessel |
-
2009
- 2009-05-12 DE DE102009020990A patent/DE102009020990A1/en not_active Withdrawn
-
2010
- 2010-04-21 EP EP10719993A patent/EP2429743A1/en not_active Withdrawn
- 2010-04-21 WO PCT/EP2010/002443 patent/WO2010130330A1/en active Application Filing
- 2010-04-21 US US13/319,720 patent/US20120055958A1/en not_active Abandoned
- 2010-04-21 CN CN2010800206606A patent/CN102421552A/en active Pending
- 2010-04-21 JP JP2012510127A patent/JP2012526659A/en active Pending
- 2010-04-21 MX MX2011011987A patent/MX2011011987A/en unknown
- 2010-04-21 BR BRPI1013506A patent/BRPI1013506A2/en not_active IP Right Cessation
- 2010-04-21 RU RU2011150270/02A patent/RU2011150270A/en not_active Application Discontinuation
- 2010-04-21 KR KR1020117029426A patent/KR20120027323A/en not_active Application Discontinuation
-
2011
- 2011-11-10 ZA ZA2011/08253A patent/ZA201108253B/en unknown
Cited By (1)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
US20130233899A1 (en) * | 2010-11-11 | 2013-09-12 | Rhi Ag | Discharge nozzle for installation inside the base of a metallurgical vessel |
Also Published As
Publication number | Publication date |
---|---|
BRPI1013506A2 (en) | 2016-04-05 |
CN102421552A (en) | 2012-04-18 |
RU2011150270A (en) | 2013-06-20 |
MX2011011987A (en) | 2011-12-08 |
DE102009020990A1 (en) | 2010-11-18 |
EP2429743A1 (en) | 2012-03-21 |
KR20120027323A (en) | 2012-03-21 |
JP2012526659A (en) | 2012-11-01 |
ZA201108253B (en) | 2012-07-25 |
WO2010130330A1 (en) | 2010-11-18 |
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Legal Events
Date | Code | Title | Description |
---|---|---|---|
AS | Assignment |
Owner name: HERAEUS ELECTRO-NITE INTERNATIONAL N.V., BELGIUM Free format text: ASSIGNMENT OF ASSIGNORS INTEREST;ASSIGNORS:DAMS, FRANCIS;KENDALL, MARTIN;REEL/FRAME:027206/0197 Effective date: 20110816 |
|
AS | Assignment |
Owner name: RHI AG, AUSTRIA Free format text: ASSIGNMENT OF ASSIGNORS INTEREST;ASSIGNOR:HERAEUS ELECTRO-NITE INTERNATIONAL N.V.;REEL/FRAME:028438/0497 Effective date: 20120420 |
|
STCB | Information on status: application discontinuation |
Free format text: EXPRESSLY ABANDONED -- DURING EXAMINATION |