US20110140321A1 - Tuyer device for introducing gas media under a liquid metal level - Google Patents
Tuyer device for introducing gas media under a liquid metal level Download PDFInfo
- Publication number
- US20110140321A1 US20110140321A1 US12/597,537 US59753708A US2011140321A1 US 20110140321 A1 US20110140321 A1 US 20110140321A1 US 59753708 A US59753708 A US 59753708A US 2011140321 A1 US2011140321 A1 US 2011140321A1
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- US
- United States
- Prior art keywords
- section
- liquid metal
- channels
- pipes
- tuyer
- 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
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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
- C21C5/42—Constructional features of converters
- C21C5/46—Details or accessories
- C21C5/48—Bottoms or tuyéres of converters
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B22—CASTING; POWDER METALLURGY
- B22D—CASTING OF METALS; CASTING OF OTHER SUBSTANCES BY THE SAME PROCESSES OR DEVICES
- B22D1/00—Treatment of fused masses in the ladle or the supply runners before casting
- B22D1/002—Treatment with gases
- B22D1/005—Injection assemblies therefor
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F27—FURNACES; KILNS; OVENS; RETORTS
- F27D—DETAILS OR ACCESSORIES OF FURNACES, KILNS, OVENS, OR RETORTS, IN SO FAR AS THEY ARE OF KINDS OCCURRING IN MORE THAN ONE KIND OF FURNACE
- F27D3/00—Charging; Discharging; Manipulation of charge
- F27D3/16—Introducing a fluid jet or current into the charge
-
- 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
- C21C2250/00—Specific additives; Means for adding material different from burners or lances
- C21C2250/08—Porous plug
-
- 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
- C22B9/05—Refining by treating with gases, e.g. gas flushing also refining by means of a material generating gas in situ
-
- Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
- Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
- Y02P—CLIMATE CHANGE MITIGATION TECHNOLOGIES IN THE PRODUCTION OR PROCESSING OF GOODS
- Y02P10/00—Technologies related to metal processing
- Y02P10/10—Reduction of greenhouse gas [GHG] emissions
- Y02P10/143—Reduction of greenhouse gas [GHG] emissions of methane [CH4]
Definitions
- the invention relates to producing and processing liquid metal (steel in ferrous metallurgy) in metallurgy.
- Argon, nitrogen and oxygen combined with CH 4 and nitrogen additives are used as gases. This operation allows accelerating homogenization of liquid metal and processes used during metal refining.
- a blower is used to supply gas into the steel-making unit including a tuyer device as the base that in any way comprises metal pipes that gas supply (working) channels are arranged into.
- a tuyer device with a blowing element for side supplying oxygen in molten metal is widely used.
- a central working channel for oxygen supply (including with nitrogen added) encompasses an annular working channel for supplying, for example, CH 4 with nitrogen added.
- a key problem for implementation of side supplying oxygen under a liquid metal level is the requirement to provide for continuous gas supply to liquid steel. Any interruption in gas supply results in liquid steel to be supplied into working channels with the possibility for steel breakthrough beyond the steel containing unit.
- a blowing element of a steel-making unit is known, wherein the specified problem is solved.
- the blowing element comprises a number of straight pipe sections connected between each other, that gas supply channels are arranged into, while the sections of connected pipes comprise a section with capillary and gas supply channels (refer to, for example, KNABL “Annual Refractory Symposium” dated Jul. 1-5, 2002).
- a material disadvantage of the known blowing element is its inapplicability for oxygen supply under a metal level.
- a tuyer device for side supplying oxygen under a liquid metal level comprises a well block from a refractory material with a built-in shell coaxial metal pipes arranged inside the shell having on the side of a device introducible into the liquid metal, at least one central working channel and at least one annular working channel; the channels are separately connected to ducts for supplying gas media to liquid metal (refer to, for example, European Patent No. EP 0 565 690 B1).
- the known tuyer device is the closest to the claimed one according to its essential features; therefore it is taken as a prototype.
- a material disadvantage of the known tuyer device is that it does not comprise, in fact, protection from breakthrough of liquid metal through working channels.
- the claimed tuyer device is free from the specified disadvantage.
- the problem of protection from breakthrough of liquid metal is solved through working channels therein.
- the tuyer device for introducing gas media under a liquid metal level comprising a well block from a refractory material with a built-in shell, coaxial metal pipes arranged inside the shell, having on the side of a device introducible into the liquid metal, at least one central working channel and at least one annular working channel, the working channels are separately connected to ducts for supplying gas media to the metal, according to the claim coaxial metal pipes along their length consist of two interconnected sections of different diameters, the first section has the smaller diameter and designed for the specified supplying gas media into liquid metal, the second section having the larger diameter, being connected to the ducts for separately supplying gas media to the working channels of the first section, being provided with an extra pipe and having the annular channels only and the internal pipe of the section being closed on both ends and filled with a refractory material, the gaps of annular working channels of this tuyer section are in the form of capillaries for the liquid metal.
- annular working channels of the second section of the shell in transition areas to working channels of the first section of the shell are outlined with straight taper surfaces with smooth transition at end points, wherein at least in the transition area the end part of the internal pipe passes into the taper rod located coaxially in the central working channel of the first section.
- annular channels of the second section of the coaxial metal pipes in transition areas into working channels of the first section have spherical surface with smooth transition at transition end points, wherein at least in the transition area the end part of the internal pipe passes into a taper rod, located coaxially in the central working channel of the first section.
- the annular working channels in the second section of the shell are calibrated being located between pipes of a calibration spring, which initial diameter is lower that outside diameter of the pipe that this spring is placed on.
- the internal pipe of the second section of the coaxial metal pipes has calibration ribs along the outside diameter, including the transition area of the second section of the coaxial pipes into the first section.
- the pipes in the second section of the shell have a circumferential weld.
- FIG. 1 longitudinal section of the tuyer device is shown
- FIG. 2 longitudinal section of a tuyer device embodiment
- FIG. 3 transverse section A-A in FIG. 1 ,
- the tuyer device comprises coaxial metal pipes 1 and 2 on the side designed introducible into liquid metal. Outside diameter of pipes 2 is designated d in FIGS. 1 and 2 . It is the first section of the coaxial metal pipes. In the second section these metal pipes have the larger in comparison with d diameter equal to D for external pipe 2 , and central pipe 3 is located between pipes 1 and 2 closed on both ends.
- Pipes are embedded into shell 6 that in its turn is arranged in well block 7 .
- Central pipe 3 is filled with refractory material 8 .
- central pipes 3 at least on the side of the central working channel 4 passes into taper rod 9 that passes into channel 4 being arranged coaxial with the channel ( FIGS. 1 and 2 ).
- Central pipe 3 can have ends in the form of taper rod 9 on the both sides ( FIG. 2 ).
- annular working channels 10 and 11 interconnected respectively 10 with 5 and 11 with 4 working channels.
- Annular working channels 10 and 11 are separately connected to ducts for supplying the respective gas into channel 10 along pipe 12 and into channel 11 along pipe 13 (ducts are shown in FIGS. 1 and 2 by arrows).
- Working channels 4 , 5 , 10 and 11 are calibrated and for annular channels 5 , 10 and 11 either different design ribs 14 or calibration spring 15 are used, wherein ribs 14 and spring 15 encompass also transition areas 16 ( FIG. 1) and 17 ( FIG. 2 ) of the second section of the coaxial metal pipes to their first section.
- spring 15 this position is provided by springs with internal diameter is a bit lower than the outside diameter of the relative pipe.
- annular channels 10 and 11 are equal or a bit more than cross-section of channels which they are separately connected with, i.e. channel 10 with channel 5 and channel 11 with channel 4 .
- the size of annular gaps of channels 10 and 11 is capillary for liquid metal under which level gas media is considered to be supplied, wherein the capillary is meant to be a narrow gap that prevent liquid metal from passing through it.
- capillaries are to be gaps of 1.5 . . . 2 mm and less.
- the metal pipes in the second section of the unit have circumferential welds 18 .
- the tuyer device for introducing gas media under a liquid metal level operates as follows.
- Well block 7 with shell 6 and steel pipes 1 , 2 and 3 as shown in FIG. 1 or 2 are to be mounted in unit lining that is used for production and processing liquid metal.
- oxygen is supplied to liquid metal in gaseous condition, wherein is supplied under a metal level (for example, in steel melting unit: electric arc or open-hearth furnace).
- Gaseous oxygen is supplied by pipe 13 .
- Oxygen by annular working channel 11 is supplied to central channel 4 and then to liquid metal. Due to calibration ribs 14 available oxygen is uniformly supplied into channel 4 . If calibration spring 15 is used, oxygen flow is twisted and being twisted is supplied to liquid metal that results in improving of interaction effect between metal and oxygen.
- Gas CH 4 including with nitrogen added, is supplied by pipe 12 , then by the annular working channel 10 to annular channel 5 and to liquid metal, encompassing liquid oxygen flow supplied to metal by central channel 4 . Therefore accelerated burning of the shell 6 , well block 7 and furnace lining is prevented.
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- Engineering & Computer Science (AREA)
- Chemical & Material Sciences (AREA)
- Mechanical Engineering (AREA)
- Metallurgy (AREA)
- Manufacturing & Machinery (AREA)
- Materials Engineering (AREA)
- General Engineering & Computer Science (AREA)
- Organic Chemistry (AREA)
- Carbon Steel Or Casting Steel Manufacturing (AREA)
- Treatment Of Steel In Its Molten State (AREA)
- Furnace Charging Or Discharging (AREA)
- Vertical, Hearth, Or Arc Furnaces (AREA)
- Manufacture And Refinement Of Metals (AREA)
Abstract
The invention relates to producing and processing liquid metal in metallurgy. The inventive tuyer device comprises a well block with a built-in shell, coaxial metal pipes arranged inside the shell, a central working channel and an annular channel encompassing the working channel on the side of a device introducible into the liquid metal, wherein the channels are separately connected to ducts for supplying gas media to the metal and the coaxial metal pipes consist of two interconnected sections of different diameters, the second section having the larger diameter, being connected to the ducts for separately supplying gas media to the working channels of the first section, being provided with an extra pipe and having the annular channels only, the gaps of which are in the form of capillaries for the liquid metal, the internal section of the central pipe being closed on both ends and filled with a refractory material.
Description
- The invention relates to producing and processing liquid metal (steel in ferrous metallurgy) in metallurgy.
- In recent years in metallurgy, in particular, in ferrous metallurgy, when liquid metal is produced, the process of liquid metal production is intensified introducing different media under a metal level. Gases are more often used as media.
- Argon, nitrogen and oxygen combined with CH4 and nitrogen additives are used as gases. This operation allows accelerating homogenization of liquid metal and processes used during metal refining.
- For example, in steel production blowing is widely used in steel-making units, in steel refining units.
- A blower is used to supply gas into the steel-making unit including a tuyer device as the base that in any way comprises metal pipes that gas supply (working) channels are arranged into. A tuyer device with a blowing element for side supplying oxygen in molten metal is widely used. In addition, a central working channel for oxygen supply (including with nitrogen added) encompasses an annular working channel for supplying, for example, CH4 with nitrogen added.
- A key problem for implementation of side supplying oxygen under a liquid metal level is the requirement to provide for continuous gas supply to liquid steel. Any interruption in gas supply results in liquid steel to be supplied into working channels with the possibility for steel breakthrough beyond the steel containing unit.
- The fact specified above requires a guaranteed exclusion of steel breakthrough beyond the steel containing unit.
- A blowing element of a steel-making unit is known, wherein the specified problem is solved. The blowing element comprises a number of straight pipe sections connected between each other, that gas supply channels are arranged into, while the sections of connected pipes comprise a section with capillary and gas supply channels (refer to, for example, KNABL “Annual Refractory Symposium” dated Jul. 1-5, 2002).
- A material disadvantage of the known blowing element is its inapplicability for oxygen supply under a metal level.
- A tuyer device for side supplying oxygen under a liquid metal level is known. The device comprises a well block from a refractory material with a built-in shell coaxial metal pipes arranged inside the shell having on the side of a device introducible into the liquid metal, at least one central working channel and at least one annular working channel; the channels are separately connected to ducts for supplying gas media to liquid metal (refer to, for example, European Patent No. EP 0 565 690 B1).
- The known tuyer device is the closest to the claimed one according to its essential features; therefore it is taken as a prototype.
- A material disadvantage of the known tuyer device is that it does not comprise, in fact, protection from breakthrough of liquid metal through working channels.
- The claimed tuyer device is free from the specified disadvantage. The problem of protection from breakthrough of liquid metal is solved through working channels therein.
- The marked technical result is achieved due to the fact, that in the tuyer device for introducing gas media under a liquid metal level, comprising a well block from a refractory material with a built-in shell, coaxial metal pipes arranged inside the shell, having on the side of a device introducible into the liquid metal, at least one central working channel and at least one annular working channel, the working channels are separately connected to ducts for supplying gas media to the metal, according to the claim coaxial metal pipes along their length consist of two interconnected sections of different diameters, the first section has the smaller diameter and designed for the specified supplying gas media into liquid metal, the second section having the larger diameter, being connected to the ducts for separately supplying gas media to the working channels of the first section, being provided with an extra pipe and having the annular channels only and the internal pipe of the section being closed on both ends and filled with a refractory material, the gaps of annular working channels of this tuyer section are in the form of capillaries for the liquid metal. Moreover, annular working channels of the second section of the shell in transition areas to working channels of the first section of the shell are outlined with straight taper surfaces with smooth transition at end points, wherein at least in the transition area the end part of the internal pipe passes into the taper rod located coaxially in the central working channel of the first section. In addition, annular channels of the second section of the coaxial metal pipes in transition areas into working channels of the first section have spherical surface with smooth transition at transition end points, wherein at least in the transition area the end part of the internal pipe passes into a taper rod, located coaxially in the central working channel of the first section. In addition, the annular working channels in the second section of the shell are calibrated being located between pipes of a calibration spring, which initial diameter is lower that outside diameter of the pipe that this spring is placed on. Moreover, the internal pipe of the second section of the coaxial metal pipes has calibration ribs along the outside diameter, including the transition area of the second section of the coaxial pipes into the first section. In addition, the pipes in the second section of the shell have a circumferential weld.
- The tuyer device for introducing gas media under a liquid metal level is explained with scheme drawings.
- In
FIG. 1 longitudinal section of the tuyer device is shown, - in FIG. 2—longitudinal section of a tuyer device embodiment;
- in FIG. 3—transverse section A-A in
FIG. 1 , - in FIG. 4—transverse section B-B in
FIG. 2 . - The tuyer device comprises coaxial metal pipes 1 and 2 on the side designed introducible into liquid metal. Outside diameter of pipes 2 is designated d in
FIGS. 1 and 2 . It is the first section of the coaxial metal pipes. In the second section these metal pipes have the larger in comparison with d diameter equal to D for external pipe 2, andcentral pipe 3 is located between pipes 1 and 2 closed on both ends. On the side introducible into liquid metal pipes 1 and 2 form central working channel 4 and annular working channel 5. Pipes are embedded intoshell 6 that in its turn is arranged in wellblock 7.Central pipe 3 is filled with refractory material 8. The end part (end) ofcentral pipes 3 at least on the side of the central working channel 4 passes into taper rod 9 that passes into channel 4 being arranged coaxial with the channel (FIGS. 1 and 2 ).Central pipe 3 can have ends in the form of taper rod 9 on the both sides (FIG. 2 ). In the second section coaxial metal pipes with the larger diameter D between pipes there areannular working channels 10 and 11 interconnected respectively 10 with 5 and 11 with 4 working channels.Annular working channels 10 and 11 are separately connected to ducts for supplying the respective gas intochannel 10 alongpipe 12 and into channel 11 along pipe 13 (ducts are shown inFIGS. 1 and 2 by arrows).Working channels 4, 5, 10 and 11 are calibrated and forannular channels 5, 10 and 11 eitherdifferent design ribs 14 orcalibration spring 15 are used, wherein ribs 14 andspring 15 encompass also transition areas 16 (FIG. 1) and 17 (FIG. 2 ) of the second section of the coaxial metal pipes to their first section. In regard tospring 15 this position is provided by springs with internal diameter is a bit lower than the outside diameter of the relative pipe. The following combination is also used:calibration ribs 14 inannular gap 10 andcalibration springs 15 in annular gap 11 and vice-versa. Transition between these two sections of the coaxial metal pipes can be made along taper surface 16 (FIG. 1 ) or spherical surface 17 (FIG. 2 ). By any design this transition is made smooth at transition end points. Cross-section ofannular channels 10 and 11 is equal or a bit more than cross-section of channels which they are separately connected with, i.e.channel 10 with channel 5 and channel 11 with channel 4. But in any case the size of annular gaps ofchannels 10 and 11 is capillary for liquid metal under which level gas media is considered to be supplied, wherein the capillary is meant to be a narrow gap that prevent liquid metal from passing through it. In regard to liquid steel in metal melting and refining units capillaries are to be gaps of 1.5 . . . 2 mm and less. - According to assembly conditions the metal pipes in the second section of the unit have circumferential welds 18.
- The tuyer device for introducing gas media under a liquid metal level operates as follows.
- Well
block 7 withshell 6 andsteel pipes 1, 2 and 3 as shown inFIG. 1 or 2 are to be mounted in unit lining that is used for production and processing liquid metal. To intensify production process (metal melting or refining) oxygen is supplied to liquid metal in gaseous condition, wherein is supplied under a metal level (for example, in steel melting unit: electric arc or open-hearth furnace). Gaseous oxygen is supplied by pipe 13. In some cases a certain quantity of nitrogen is added to oxygen. Oxygen by annular working channel 11 is supplied to central channel 4 and then to liquid metal. Due tocalibration ribs 14 available oxygen is uniformly supplied into channel 4. Ifcalibration spring 15 is used, oxygen flow is twisted and being twisted is supplied to liquid metal that results in improving of interaction effect between metal and oxygen. - Gas CH4, including with nitrogen added, is supplied by
pipe 12, then by the annular workingchannel 10 to annular channel 5 and to liquid metal, encompassing liquid oxygen flow supplied to metal by central channel 4. Therefore accelerated burning of theshell 6, wellblock 7 and furnace lining is prevented. - Available smooth transitions 16 (or 17), as well as taper rod 9 included into central working channel 4, prevent from effect of supplied gas jet separation.
- Selecting cross-section ratios of calibration channel 11 and central channel 4 provides for acceleration of oxygen flow to metal. Differential pressure provides for
pipe 3 to be pressed to pipe 1 throughribs 14 orspring 15. Similarly pipe 1 is pressed to pipe 2. In both cases the specified pressing is provided in areas 16(17). - In case of oxygen supply is disturbed (or in case of any other causes) liquid metal (steel) starts to be supplied to central channel 4. Calibration design of annular working
channels 10 and 11 with capillary gaps for liquid metal (1.5 . . . 2.0 mm for liquid steel) stops further passing of liquid metal. Moreover, effect of metal breakthrough prevention is intensified by the refractory material 8 being melted. - Therefore, in the claimed tuyer device for introducing gas media under a liquid metal level metal breakthrough is prevented over the operation area of the tuyer device.
Claims (6)
1. A tuyer device for introducing gas media under a liquid metal level comprising a well block from a refractory material with a built-in shell, coaxial metal pipes arranged inside the shell, having on the side of a device introducible into the liquid metal, at least one central working channel and at least one annular working channel, the working channels are separately connected to ducts for supplying gas media to the metal, wherein the coaxial metal pipes along their length consist of two interconnected sections of different diameters, the first section having the smaller diameter and designed for the specified supplying gas media to liquid metal, the second section having the larger diameter, being connected to the ducts for separately supplying gas media to the working channels of the first section, being provided with an extra pipe and having the annular channels only and the internal pipe of the section being closed on both ends and filled with a refractory material, the gaps of annular working channels of this tuyer section are in the form of capillaries for the liquid metal.
2. The tuyer device according to claim 1 , wherein the annular working channels of the second section of the coaxial metal pipes in transition areas into working channels of the first section are outlined with straight taper surfaces with smooth transition at end points, while at least in the transition area the end part of the internal pipe passes into a taper rod located coaxially in the central working channel of the first section.
3. The tuyer device according to claim 1 , wherein the annular channels of the second section of the coaxial metal pipes in transition areas into the working channels of the first section have spherical surface with smooth transition at end points, while at least in the transition area the end part of the internal pipe passes into the taper rod, located coaxially in the central working channel of the first section.
4. The tuyer device according to claim 1 , wherein the annular working channels in the second section of the shell are calibrated being located between pipes of the calibration spring with initial diameter lower than the outside diameter of the pipe, that this spring is placed on.
5. The tuyer device according to claim 1 , wherein the internal pipe of the second section of the coaxial metal pipes is made with calibration ribs on the outside diameter, including over the transition area of the second section of the coaxial pipes into the first section.
6. The tuyer device according to claim 1 , wherein the pipes in the second section of the shell have circumferential weld.
Applications Claiming Priority (3)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
RU2007115836/02A RU2374328C2 (en) | 2007-04-26 | 2007-04-26 | Tuyere device for introduction of gas mediums under level of liquid metal |
RU2007115836 | 2007-04-26 | ||
PCT/RU2008/000264 WO2008153440A2 (en) | 2007-04-26 | 2008-04-24 | Tuyer device for introducing gas media under a liquid metal level |
Publications (1)
Publication Number | Publication Date |
---|---|
US20110140321A1 true US20110140321A1 (en) | 2011-06-16 |
Family
ID=40130338
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
US12/597,537 Abandoned US20110140321A1 (en) | 2007-04-26 | 2008-04-24 | Tuyer device for introducing gas media under a liquid metal level |
Country Status (7)
Country | Link |
---|---|
US (1) | US20110140321A1 (en) |
EP (1) | EP2154256A4 (en) |
CN (1) | CN101715491A (en) |
BR (1) | BRPI0810678A2 (en) |
EA (1) | EA015797B1 (en) |
RU (1) | RU2374328C2 (en) |
WO (1) | WO2008153440A2 (en) |
Families Citing this family (2)
Publication number | Priority date | Publication date | Assignee | Title |
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DE102010015098B4 (en) | 2010-04-15 | 2014-05-15 | Techcom Gmbh | Device for introducing gases into hot liquid media |
WO2011127877A1 (en) | 2010-04-15 | 2011-10-20 | Techcom Gmbh | Device for introducing gases into hot liquid media |
Citations (1)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
EP1645643A1 (en) * | 2003-06-16 | 2006-04-12 | Techcom Import-Export Gmbh | Tuyere device for introducing gaseous media under a liquid-metal layer |
Family Cites Families (5)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
NZ206264A (en) * | 1982-11-23 | 1986-02-21 | Injectall Ltd | Apparatus for introducing substance into metal melts |
US4573418A (en) * | 1982-12-01 | 1986-03-04 | Steirische Wasserkraft- Und Elektrizitaets-Ag | Method of and apparatus for reheating desulfurized waste gas |
DE3809828A1 (en) * | 1988-03-23 | 1989-10-12 | Radex Heraklith | COOLSTONE |
DE4136552A1 (en) | 1991-11-06 | 1993-05-13 | Kortec Ag | NOZZLE DEVICE FOR INITIATING MEDIA INTO A MELT AND METHOD FOR OPERATING THIS NOZZLE DEVICE |
US5249778A (en) * | 1992-04-14 | 1993-10-05 | Dolomitwerke Gmbh | Gas stir plug device with visual wear indicator |
-
2007
- 2007-04-26 RU RU2007115836/02A patent/RU2374328C2/en not_active IP Right Cessation
-
2008
- 2008-04-24 CN CN200880013540A patent/CN101715491A/en active Pending
- 2008-04-24 WO PCT/RU2008/000264 patent/WO2008153440A2/en active Application Filing
- 2008-04-24 US US12/597,537 patent/US20110140321A1/en not_active Abandoned
- 2008-04-24 EA EA200901452A patent/EA015797B1/en not_active IP Right Cessation
- 2008-04-24 EP EP08767025A patent/EP2154256A4/en not_active Withdrawn
- 2008-04-24 BR BRPI0810678-9A patent/BRPI0810678A2/en not_active IP Right Cessation
Patent Citations (2)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
EP1645643A1 (en) * | 2003-06-16 | 2006-04-12 | Techcom Import-Export Gmbh | Tuyere device for introducing gaseous media under a liquid-metal layer |
US7534390B2 (en) * | 2003-06-16 | 2009-05-19 | Techcom Import Export Gmbh | Tuyere device for introducing gaseous media under a liquid-metal layer |
Also Published As
Publication number | Publication date |
---|---|
RU2374328C2 (en) | 2009-11-27 |
RU2007115836A (en) | 2008-11-10 |
BRPI0810678A2 (en) | 2015-06-16 |
EP2154256A4 (en) | 2010-11-17 |
WO2008153440A2 (en) | 2008-12-18 |
CN101715491A (en) | 2010-05-26 |
EP2154256A2 (en) | 2010-02-17 |
WO2008153440A3 (en) | 2009-02-12 |
EA015797B1 (en) | 2011-12-30 |
EA200901452A1 (en) | 2010-08-30 |
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AS | Assignment |
Owner name: TECHCOM GMBH, GERMANY Free format text: ASSIGNMENT OF ASSIGNORS INTEREST;ASSIGNORS:SCHUMACHER, EDGAR;HLOPONIN, VIKTOR NIKOLAEVICH;FRANZKY, RENATA;AND OTHERS;REEL/FRAME:023783/0843 Effective date: 20091022 |
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STCB | Information on status: application discontinuation |
Free format text: ABANDONED -- FAILURE TO RESPOND TO AN OFFICE ACTION |