EP1560936A1 - Gaszuleitungssystem f r einen metallurgischen ofen sowie bet riebsverfahren hierzu - Google Patents
Gaszuleitungssystem f r einen metallurgischen ofen sowie bet riebsverfahren hierzuInfo
- Publication number
- EP1560936A1 EP1560936A1 EP03811346A EP03811346A EP1560936A1 EP 1560936 A1 EP1560936 A1 EP 1560936A1 EP 03811346 A EP03811346 A EP 03811346A EP 03811346 A EP03811346 A EP 03811346A EP 1560936 A1 EP1560936 A1 EP 1560936A1
- Authority
- EP
- European Patent Office
- Prior art keywords
- gas supply
- supply system
- gas
- nozzle
- furnace
- 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
- 238000011017 operating method Methods 0.000 title description 3
- 238000007664 blowing Methods 0.000 claims abstract description 17
- 238000011144 upstream manufacturing Methods 0.000 claims abstract description 3
- 238000000034 method Methods 0.000 claims description 12
- 230000000903 blocking effect Effects 0.000 claims description 5
- 230000001360 synchronised effect Effects 0.000 claims 1
- 230000000694 effects Effects 0.000 abstract description 17
- 229910001220 stainless steel Inorganic materials 0.000 abstract description 4
- 229910000975 Carbon steel Inorganic materials 0.000 abstract description 3
- 239000010962 carbon steel Substances 0.000 abstract 1
- 230000010355 oscillation Effects 0.000 abstract 1
- 239000010935 stainless steel Substances 0.000 abstract 1
- 239000007789 gas Substances 0.000 description 48
- 239000002184 metal Substances 0.000 description 7
- 238000002347 injection Methods 0.000 description 6
- 239000007924 injection Substances 0.000 description 6
- 238000000605 extraction Methods 0.000 description 5
- 230000010349 pulsation Effects 0.000 description 5
- 238000007670 refining Methods 0.000 description 5
- 238000004519 manufacturing process Methods 0.000 description 4
- 239000012071 phase Substances 0.000 description 4
- 230000003628 erosive effect Effects 0.000 description 3
- 230000002349 favourable effect Effects 0.000 description 3
- 239000011819 refractory material Substances 0.000 description 3
- XKRFYHLGVUSROY-UHFFFAOYSA-N Argon Chemical compound [Ar] XKRFYHLGVUSROY-UHFFFAOYSA-N 0.000 description 2
- IJGRMHOSHXDMSA-UHFFFAOYSA-N Atomic nitrogen Chemical compound N#N IJGRMHOSHXDMSA-UHFFFAOYSA-N 0.000 description 2
- 229910000831 Steel Inorganic materials 0.000 description 2
- QVGXLLKOCUKJST-UHFFFAOYSA-N atomic oxygen Chemical compound [O] QVGXLLKOCUKJST-UHFFFAOYSA-N 0.000 description 2
- 239000000155 melt Substances 0.000 description 2
- 239000001301 oxygen Substances 0.000 description 2
- 229910052760 oxygen Inorganic materials 0.000 description 2
- 239000010959 steel Substances 0.000 description 2
- 238000012360 testing method Methods 0.000 description 2
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 description 2
- VEXZGXHMUGYJMC-UHFFFAOYSA-N Hydrochloric acid Chemical compound Cl VEXZGXHMUGYJMC-UHFFFAOYSA-N 0.000 description 1
- 230000006978 adaptation Effects 0.000 description 1
- 229910052786 argon Inorganic materials 0.000 description 1
- 230000015572 biosynthetic process Effects 0.000 description 1
- 238000006243 chemical reaction Methods 0.000 description 1
- 238000005261 decarburization Methods 0.000 description 1
- 238000011835 investigation Methods 0.000 description 1
- 239000007791 liquid phase Substances 0.000 description 1
- 229910001338 liquidmetal Inorganic materials 0.000 description 1
- 230000001050 lubricating effect Effects 0.000 description 1
- 239000000203 mixture Substances 0.000 description 1
- 239000004570 mortar (masonry) Substances 0.000 description 1
- 229910052757 nitrogen Inorganic materials 0.000 description 1
- 230000000246 remedial effect Effects 0.000 description 1
- 239000002893 slag Substances 0.000 description 1
- 238000012546 transfer Methods 0.000 description 1
Classifications
-
- C—CHEMISTRY; METALLURGY
- C21—METALLURGY OF IRON
- C21C—PROCESSING OF PIG-IRON, e.g. REFINING, MANUFACTURE OF WROUGHT-IRON OR STEEL; TREATMENT IN MOLTEN STATE OF FERROUS ALLOYS
- C21C5/00—Manufacture of carbon-steel, e.g. plain mild steel, medium carbon steel or cast steel or stainless steel
- C21C5/28—Manufacture of steel in the converter
- C21C5/30—Regulating or controlling the blowing
- C21C5/35—Blowing from above and through the bath
-
- C—CHEMISTRY; METALLURGY
- C21—METALLURGY OF IRON
- C21C—PROCESSING OF PIG-IRON, e.g. REFINING, MANUFACTURE OF WROUGHT-IRON OR STEEL; TREATMENT IN MOLTEN STATE OF FERROUS ALLOYS
- C21C5/00—Manufacture of carbon-steel, e.g. plain mild steel, medium carbon steel or cast steel or stainless steel
- C21C5/28—Manufacture of steel in the converter
- C21C5/30—Regulating or controlling the blowing
- C21C5/34—Blowing through the bath
-
- C—CHEMISTRY; METALLURGY
- C21—METALLURGY OF IRON
- C21C—PROCESSING OF PIG-IRON, e.g. REFINING, MANUFACTURE OF WROUGHT-IRON OR STEEL; TREATMENT IN MOLTEN STATE OF FERROUS ALLOYS
- C21C5/00—Manufacture of carbon-steel, e.g. plain mild steel, medium carbon steel or cast steel or stainless steel
- C21C5/28—Manufacture of steel in the converter
- C21C5/42—Constructional features of converters
- C21C5/46—Details or accessories
- C21C5/48—Bottoms or tuyéres of converters
Definitions
- the invention relates to a gas supply system and an operating method for such a system for a side and / or bottom blowing metallurgical furnace, in particular a converter for the production of carbon steels or stainless steels, with at least one nozzle which is arranged in the furnace side wall and / or in the furnace floor , whereby gas is conveyed via a line to the nozzle and via the nozzle into the interior of the metallurgical furnace.
- converters of the AOD (Argon-Oxygen-Decarburization) type with nozzles arranged on the side, while converters with bottom nozzles are also used for other steel qualities.
- AOD Arx-Oxygen-Decarburization
- converters with bottom nozzles are also used for other steel qualities.
- different mixtures of oxygen and argon are applied to the nozzles.
- the nozzles are located below the metal bath level.
- FIG. 5 schematically shows the individual time sequences when a gas jet enters a metal melt and the “back-attack” effect on the basis of 5 stages.
- the gas jet 101 enters the molten metal 103 from the horizontally lying nozzle 102 approximately horizontally (FIG. 5, partial image 1).
- a gas bubble column 104 is formed.
- the gas bubble is expanded further into the interior of the molten metal 103 (partial picture 2).
- a constriction 105 occurs on the "stem” of the gas bubble and a "collapse” (partial picture 3), and finally the gas bubble 106 detaches itself in large format (partial picture 4).
- the object of the invention is to alleviate or eliminate the "back-attack" effect in metallurgical furnaces, the disadvantages mentioned above not being said to occur.
- the gas supply system of the metallurgical furnace has an inlet throttle device which is upstream or associated with the nozzle and which periodically reduces or interrupts the gas supply into the furnace interior. This ensures that the gas bubble can detach itself from the nozzle tip at much shorter intervals than with the conventional uninterrupted gas flow. This means that small bubbles form right from the start, and the effects of the "back-attack" on the vessel wall are much less. At the same time, there is a higher surface-to-volume ratio of the gas bubbles.
- the gas flow into the furnace interior be reduced or interrupted periodically at frequencies above approximately 5 Hz, and thus the gas flow is divided into smaller volume units. It was found that from a frequency of about 5 Hz switching frequency of the inflow throttle device there is a significant reduction in the maximum pressure amplitudes at approximately the same frequency. This favorable reduction in pressure amplitudes can be amplified with increasing switching frequency with very favorable results at a switching frequency of 20 Hz and higher, for example.
- the inflow throttle device is arranged in the gas supply line to the nozzles and as close as possible to the nozzle outlet.
- any type of inflow throttling devices or units for gas flows can be considered.
- a device of a mechanical type is proposed, preferably a solenoid or a servo valve.
- the arrangement of the inlet throttle devices should preferably be carried out in such a way that they can be bypassed.
- the system has lockable bypass lines that integrate the respective lines Inlet throttle device are assigned. It is then possible, in certain blowing phases, for example in phases with a low blowing rate, in which the "back-attack" effect is not so pronounced, to pass the gas flow only through the bypass lines and towards regulation by the inflow throttling devices dispense. At the same time, with such an arrangement, operation can continue in the event of failure of one or more of the inflow throttle devices.
- Figure 1 is a schematic representation of a metallurgical furnace with a gas supply system according to the invention.
- Fig. 2 shows the alternating pressure as a function of time for a
- Gas supply system with nozzle without valve according to the prior art 3 shows a corresponding representation of the alternating pressure as a function of time for a gas supply system according to the invention with pulsation through a solenoid valve;
- Fig. 4 shows the alternating pressure as a function of time for a
- Gas supply system with pulsation through a servo valve; 5 schematically shows the mechanism of the “back-attack” phenomenon; 6 shows the dependence of the “back-attack” frequency on the gas blowing pressure from “Injection Phenomena in Extraction and Refining”, ed. By AE Wraith, April 1982, pages A1- 36.
- FIG. 1 schematically shows, using the example of a converter 1 with a refractory lining 2, a gas supply system 3 according to the invention for reducing or preventing the “back-attack” effect.
- a gas supply system 3 for reducing or preventing the “back-attack” effect.
- several (submersible) nozzles are used on the converter wall, which lie below the bath surface 4 after the converter 1 has been placed vertically, only one of the nozzles 5 is shown by way of example in Fig. 1.
- the nozzle 5 extends horizontally through the refractory lining 2 of the furnace.
- the nozzle 5 is part of the gas supply system 3, which also has gas lines 6, in each of which an inflow throttle device 7, here a solenoid valve or a servo valve, is integrated in.
- This inflow throttle device 7 is arranged as close as possible to the nozzle outlet or regularly reduced or completely interrupted for a short time Gas lines 6, the gas supply system 7 each have bypass lines 8.
- the respective bypass line 8 can be shut off or opened by means of a locking device 9.
- the inflow throttle device 7 or the blocking device 9 is then closed.
- the control of the valve and the blocking device 9 is carried out by means of a control device 10 which is connected to the valve and the blocking device 9 via control lines 11.
- the control device 10 is also used to control the adaptation of individual valves of adjacent feed lines for a plurality of nozzles and the blocking devices of the bypass lines.
Landscapes
- Engineering & Computer Science (AREA)
- Chemical & Material Sciences (AREA)
- Manufacturing & Machinery (AREA)
- Materials Engineering (AREA)
- Metallurgy (AREA)
- Organic Chemistry (AREA)
- Carbon Steel Or Casting Steel Manufacturing (AREA)
- Furnace Charging Or Discharging (AREA)
Abstract
Description
Claims
Applications Claiming Priority (3)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
DE10253535A DE10253535A1 (de) | 2002-11-16 | 2002-11-16 | Gaszuleitungssystem für einen metallurgischen Ofen sowie Betriebsverfahren hierzu |
DE10253535 | 2002-11-16 | ||
PCT/EP2003/010920 WO2004046390A1 (de) | 2002-11-16 | 2003-10-02 | Gaszuleitungssystem für einen metallurgischen ofen sowie betriebsverfahren hierzu |
Publications (2)
Publication Number | Publication Date |
---|---|
EP1560936A1 true EP1560936A1 (de) | 2005-08-10 |
EP1560936B1 EP1560936B1 (de) | 2014-04-09 |
Family
ID=32185777
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
EP03811346.0A Expired - Lifetime EP1560936B1 (de) | 2002-11-16 | 2003-10-02 | Gaszuleitungssystem für einen metallurgischen ofen sowie betriebsverfahren hierzu |
Country Status (17)
Country | Link |
---|---|
US (2) | US7691320B2 (de) |
EP (1) | EP1560936B1 (de) |
JP (1) | JP4485954B2 (de) |
KR (1) | KR101024248B1 (de) |
CN (2) | CN103805733A (de) |
AR (1) | AR041962A1 (de) |
AU (1) | AU2003276022B2 (de) |
BR (1) | BR0316334B1 (de) |
CA (1) | CA2506333C (de) |
DE (1) | DE10253535A1 (de) |
EG (1) | EG23630A (de) |
MX (1) | MXPA05005234A (de) |
PL (1) | PL202586B1 (de) |
RU (1) | RU2335550C2 (de) |
UA (1) | UA79339C2 (de) |
WO (1) | WO2004046390A1 (de) |
ZA (1) | ZA200502675B (de) |
Families Citing this family (6)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
CN102560004B (zh) * | 2012-02-14 | 2015-09-16 | 中冶赛迪工程技术股份有限公司 | 钢水包气体搅拌的方法及搅拌气体控制装置 |
CN105339585A (zh) | 2013-06-27 | 2016-02-17 | 国际壳牌研究有限公司 | 对由沥青质造成的井孔和生产管线的堵塞的修复 |
BR112016012017B1 (pt) * | 2013-11-28 | 2021-03-02 | Jfe Steel Corporation | método de operação de um conversor |
EP2910651A1 (de) | 2014-02-19 | 2015-08-26 | Siemens VAI Metals Technologies GmbH | Verfahren zum Umwälzen eines Metallbades und Ofenanlage |
EP2993240A1 (de) * | 2014-09-08 | 2016-03-09 | Primetals Technologies Austria GmbH | Drosseleinrichtung, Ofen und Verfahren zum Betreiben des Ofens |
CN111041158A (zh) * | 2019-12-23 | 2020-04-21 | 广东华鳌合金新材料有限公司 | 一种带稳压罐的aod炉气体装置及其炼钢方法 |
Family Cites Families (13)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
US3851866A (en) * | 1971-12-09 | 1974-12-03 | H Knuppel | Process and a device for even distribution and alternating supply of liquid and gaseous protective media for the refining gas tuyeres of a converter |
FR2173060A1 (en) * | 1972-02-22 | 1973-10-05 | Centre Rech Metallurgique | Fluid injection simultaneously with oxygen in converter - - protects refractory lining in region of tuyere |
EP0045658A1 (de) * | 1980-08-06 | 1982-02-10 | British Steel Corporation | Verfahren zum Überwachen einer Gaseinlassöffnung |
DE3045992A1 (de) * | 1980-12-05 | 1982-07-22 | Metallgesellschaft Ag, 6000 Frankfurt | Verfahren zum einblasen von hochsauerstoffhaltigen gasen in ein ne-metalle enthaltendes schmelzbad |
JPS5871343A (ja) * | 1981-10-22 | 1983-04-28 | Kobe Steel Ltd | 溶融金属容器に設けるガス吹込み用ノズル |
JPS63171820A (ja) | 1987-01-12 | 1988-07-15 | Kobe Steel Ltd | 精錬炉の吹錬方法 |
US4824080A (en) * | 1987-02-24 | 1989-04-25 | Allegheny Ludlum Corporation | Apparatus for introducing gas into molten metal baths |
SE8702601L (sv) * | 1987-06-23 | 1988-12-24 | Hoeganaes Ab | Metallurgisk dysa |
DE3728526C1 (en) * | 1987-08-24 | 1989-03-30 | Mannesmann Ag | Method for minimising the process gas consumption in metallurgical processes |
JPH07310112A (ja) * | 1994-03-22 | 1995-11-28 | Kawasaki Steel Corp | 底吹きノズルを有する精錬容器中の溶融金属の揺動防止方法 |
JPH09176719A (ja) * | 1995-12-26 | 1997-07-08 | Sumitomo Metal Ind Ltd | 転炉および吹錬操業方法 |
CN1148459C (zh) * | 1998-11-20 | 2004-05-05 | 广西柳州钢铁(集团)公司 | 一种转炉氧枪气流的喷吹方法及装置 |
ITRM20010146A1 (it) * | 2001-03-21 | 2002-09-21 | Acciai Speciali Terni Spa | Metodo e sistema di controllo per convertitori aod. |
-
2002
- 2002-11-16 DE DE10253535A patent/DE10253535A1/de not_active Withdrawn
-
2003
- 2003-02-10 UA UAA200505915A patent/UA79339C2/uk unknown
- 2003-10-02 CA CA2506333A patent/CA2506333C/en not_active Expired - Fee Related
- 2003-10-02 EP EP03811346.0A patent/EP1560936B1/de not_active Expired - Lifetime
- 2003-10-02 US US10/534,944 patent/US7691320B2/en not_active Expired - Fee Related
- 2003-10-02 BR BRPI0316334-2A patent/BR0316334B1/pt not_active IP Right Cessation
- 2003-10-02 KR KR1020057008739A patent/KR101024248B1/ko active IP Right Grant
- 2003-10-02 AU AU2003276022A patent/AU2003276022B2/en not_active Ceased
- 2003-10-02 CN CN201310741476.6A patent/CN103805733A/zh active Pending
- 2003-10-02 RU RU2005118554/02A patent/RU2335550C2/ru not_active IP Right Cessation
- 2003-10-02 JP JP2004552469A patent/JP4485954B2/ja not_active Expired - Fee Related
- 2003-10-02 MX MXPA05005234A patent/MXPA05005234A/es active IP Right Grant
- 2003-10-02 WO PCT/EP2003/010920 patent/WO2004046390A1/de active Application Filing
- 2003-10-02 PL PL375315A patent/PL202586B1/pl not_active IP Right Cessation
- 2003-10-02 CN CNA2003801031863A patent/CN1711362A/zh active Pending
- 2003-11-13 AR ARP030104191A patent/AR041962A1/es active IP Right Grant
-
2005
- 2005-04-01 ZA ZA200502675A patent/ZA200502675B/en unknown
- 2005-05-15 EG EGNA2005000224 patent/EG23630A/xx active
-
2009
- 2009-01-17 US US12/321,180 patent/US7998400B2/en not_active Expired - Fee Related
Non-Patent Citations (1)
Title |
---|
See references of WO2004046390A1 * |
Also Published As
Publication number | Publication date |
---|---|
JP4485954B2 (ja) | 2010-06-23 |
EG23630A (en) | 2007-02-05 |
CA2506333A1 (en) | 2004-06-03 |
DE10253535A1 (de) | 2004-05-27 |
PL375315A1 (en) | 2005-11-28 |
CA2506333C (en) | 2011-07-05 |
CN1711362A (zh) | 2005-12-21 |
RU2335550C2 (ru) | 2008-10-10 |
ZA200502675B (en) | 2005-10-17 |
BR0316334A (pt) | 2005-09-27 |
PL202586B1 (pl) | 2009-07-31 |
US7691320B2 (en) | 2010-04-06 |
AR041962A1 (es) | 2005-06-01 |
KR101024248B1 (ko) | 2011-03-29 |
US7998400B2 (en) | 2011-08-16 |
WO2004046390A1 (de) | 2004-06-03 |
JP2006506522A (ja) | 2006-02-23 |
US20090194918A1 (en) | 2009-08-06 |
EP1560936B1 (de) | 2014-04-09 |
CN103805733A (zh) | 2014-05-21 |
US20060038327A1 (en) | 2006-02-23 |
AU2003276022A1 (en) | 2004-06-15 |
KR20050075020A (ko) | 2005-07-19 |
UA79339C2 (en) | 2007-06-11 |
RU2005118554A (ru) | 2006-01-20 |
AU2003276022B2 (en) | 2009-01-22 |
BR0316334B1 (pt) | 2010-09-21 |
MXPA05005234A (es) | 2005-12-14 |
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