EP0099348A1 - Porous tip for an injection lance for stirring steel by injection - Google Patents
Porous tip for an injection lance for stirring steel by injection Download PDFInfo
- Publication number
- EP0099348A1 EP0099348A1 EP83870064A EP83870064A EP0099348A1 EP 0099348 A1 EP0099348 A1 EP 0099348A1 EP 83870064 A EP83870064 A EP 83870064A EP 83870064 A EP83870064 A EP 83870064A EP 0099348 A1 EP0099348 A1 EP 0099348A1
- Authority
- EP
- European Patent Office
- Prior art keywords
- porous
- nozzle
- injection
- nose
- lance
- 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
- 229910000831 Steel Inorganic materials 0.000 title claims description 7
- 239000010959 steel Substances 0.000 title claims description 7
- 238000002347 injection Methods 0.000 title 2
- 239000007924 injection Substances 0.000 title 2
- 238000003756 stirring Methods 0.000 title 1
- 238000007664 blowing Methods 0.000 claims abstract description 8
- 230000007935 neutral effect Effects 0.000 claims abstract description 7
- 239000011343 solid material Substances 0.000 claims abstract description 3
- 239000011148 porous material Substances 0.000 claims description 6
- 230000005587 bubbling Effects 0.000 claims description 5
- 238000004873 anchoring Methods 0.000 claims description 4
- 239000002184 metal Substances 0.000 claims description 2
- 239000011449 brick Substances 0.000 description 5
- 239000007789 gas Substances 0.000 description 5
- 230000006835 compression Effects 0.000 description 3
- 238000007906 compression Methods 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
- 230000035515 penetration Effects 0.000 description 2
- 229910052786 argon Inorganic materials 0.000 description 1
- 238000005336 cracking Methods 0.000 description 1
- 239000007788 liquid Substances 0.000 description 1
- 238000004519 manufacturing process Methods 0.000 description 1
- 239000000463 material Substances 0.000 description 1
- 238000005272 metallurgy Methods 0.000 description 1
- 229910052757 nitrogen Inorganic materials 0.000 description 1
- 230000035939 shock Effects 0.000 description 1
- 239000002893 slag Substances 0.000 description 1
Images
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
- C21C5/4606—Lances or injectors
- C21C5/4613—Refractory coated lances; Immersion lances
-
- 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
-
- 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
- C21C5/4606—Lances or injectors
Definitions
- the present invention relates to a porous nose intended to be fixed to the end of a blowing lance in order to cause bubbling of the steel.
- the bubbling of the steel is done either using a porous brick which is placed in the bottom of the ladle, or using a lance provided with a nose with central hole.
- porous brick has the disadvantage that the brick must be replaced after a very limited number of flows and each time the brick is replaced it is necessary to cool the bag completely to allow handling. In addition, at each pouring it is necessary to monitor carefully to avoid the penetration of the ladle.
- the lance with central blowing hole has the disadvantage that the oiling is too powerful and that the pocket metallurgy does not give the same results as with porous brick.
- the invention relates to a porous nose intended to be fixed to the end of a blowing lance cooled or not and offering a greater bubbling surface than the devices of the prior art.
- a porous nose characterized by a body of porous solid material, having on its upper surface a fixing means for fixing the body to the end of a blowing lance, the aforementioned body being formed with a cavity cylindrical central unit which is in communication with the interior of the nozzle to receive a neutral gas from said lance.
- the porous body comprises a wide mesh screen which surrounds the central cavity in order to arm the porous material of which the body is made.
- this mesh is welded to a metal washer fixed around the nozzle.
- at least one anchoring element is advantageously welded on the periphery of the nozzle and embedded in the porous material of said body.
- the nose is capable of creating a much larger number of bulbs, which makes the bubbling operation more efficient, and that it is possible to easily avoid plugging of the nose by maintaining the neutral gas pressure in the nose for a short time to allow the slag and steel to solidify.
- the replacement of the nose can be done very quickly.
- the porous nose comprises a cylindrical body 1, made of porous concrete for example, integral with a threaded nozzle 2 intended for fixing the nose to the end of a blowing lance known per se.
- the porous body 1 having for example a diameter of 220 mm is formed with a cylindrical central cavity 3, of 60 mm in diameter to serve as a compression chamber for a neutral gas (argon or nitrogen for example).
- the chamber 3 is in communication with the interior of the nozzle 2.
- a wide mesh screen 4 which serves to reinforce the body? in order to make it more resistant to handling and to avoid cracking due to thermal shock.
- this porous nose is simple.
- a washer 5 is welded onto which the screen 4 is fixed.
- the chamber 3 is formed by passing through the opening of the nozzle 2, a cylindrical wooden body having the desired diameter for the chamber 3 and which exceeds the washer 5 of a length equal to the desired length for said compression chamber. Then pour the porous concrete to form the body 1, then remove the wooden body.
- a cylindrical piece 6 serving as an anchoring element for more firmly fixing the porous concrete.
- the upper external face of the nose body is advantageously provided with an annular baffle 7 to avoid the penetration of the liquid bath along the joint of the nose with the nozzle 2.
Landscapes
- Engineering & Computer Science (AREA)
- Chemical & Material Sciences (AREA)
- Manufacturing & Machinery (AREA)
- Materials Engineering (AREA)
- Metallurgy (AREA)
- Organic Chemistry (AREA)
- Mechanical Engineering (AREA)
- Treatment Of Steel In Its Molten State (AREA)
- Adjustment Of Camera Lenses (AREA)
- Sampling And Sample Adjustment (AREA)
- Continuous Casting (AREA)
- Coating With Molten Metal (AREA)
- Nozzles (AREA)
- Joining Of Building Structures In Genera (AREA)
- Orthopedics, Nursing, And Contraception (AREA)
- Materials For Medical Uses (AREA)
- Powder Metallurgy (AREA)
Abstract
Le corps (1) en matière solide poreuse présente sur sa face supérieure un moyen de fixation (2) pour la fixation du corps à l'extrémité d'une lance de soufflage, le corps précité étant formé avec une cavité centrale cylindrique (3) qui se trouve en communication avec l'intérieur de la buselure (2) pour recevoir un gaz neutre deladite lance. Un grillage à mailles larges (4) entourant la cavité centrale (3) est noyée dans le corps poreux.The body (1) made of porous solid material has on its upper face a fixing means (2) for fixing the body to the end of a blowing lance, the aforementioned body being formed with a cylindrical central cavity (3) which is in communication with the interior of the nozzle (2) to receive a neutral gas said nozzle. A wide mesh screen (4) surrounding the central cavity (3) is embedded in the porous body.
Description
La présente invention concerne un nez poreux destiné à être fixé à l'extrémité d'une lance de soufflage afin de provoquer le bullage de l'acier.The present invention relates to a porous nose intended to be fixed to the end of a blowing lance in order to cause bubbling of the steel.
Jusqu'à ce jour le bullage de l'acier se fait soit à l'aide d'une brique poreuse que l'on place dans le fond de la poche de coulée, soit à l'aide d'une lance munie d'un nez à trou central. L'utilisation de la brique poreuse a pour inconvénient que la brique doit être remplacée après un nombre de coulées très restreint et chaque fois que la brique est remplacée il est nécessaire de refroidir la poche complètement pour permettre les manipulations. En outre , à chaque coulée il est nécessaire de surveiller soigneusement pour éviter la percée de la poche.To date, the bubbling of the steel is done either using a porous brick which is placed in the bottom of the ladle, or using a lance provided with a nose with central hole. The use of porous brick has the disadvantage that the brick must be replaced after a very limited number of flows and each time the brick is replaced it is necessary to cool the bag completely to allow handling. In addition, at each pouring it is necessary to monitor carefully to avoid the penetration of the ladle.
La lance à trou de soufflage central a.pour inconvénient que le huilage est trop puissant et que la métallurgie en poche ne donne pas les mêmes résultats qu'avec la brique poreuse.The lance with central blowing hole has the disadvantage that the oiling is too powerful and that the pocket metallurgy does not give the same results as with porous brick.
L'invention a pour objet un nez poreux destiné à être fixé à l'extrémité d'une lance de soufflage refroidie ou non et offrant une surface de bullage plus importante que les dispositifs de l'art antérieur.The invention relates to a porous nose intended to be fixed to the end of a blowing lance cooled or not and offering a greater bubbling surface than the devices of the prior art.
Cet objectif est atteint par un nez poreux caractérisé par un corps en matière solide poreuse, présentant sur sa surface supérieure un moyen de fixation pour la fixation du corps à l'extrémité d'une lance de soufflage, le corps précité étant formé avec une cavité centrale cylindrique qui se trouve en communication avec l'intérieur de la buselure pour recevoir un gaz neutre de ladite lance.This objective is achieved by a porous nose characterized by a body of porous solid material, having on its upper surface a fixing means for fixing the body to the end of a blowing lance, the aforementioned body being formed with a cavity cylindrical central unit which is in communication with the interior of the nozzle to receive a neutral gas from said lance.
Avantageusement le corps poreux comprend un grillage à mailles larges qui entoure la cavité centrale afin d'armer la matière poreuse dont est constitué le corps. Dans un mode d'exécution, ce grillage est soudé sur une rondelle métallique fixée autour de la buselure. Pour fixer plus fermement la matière poreuse dont est constitué le corps poreux, au moins un élément d'ancrage est avantageusement soudé sur le pourtour de la buselure et noyé dans la matière poreuse dudit corps.Advantageously, the porous body comprises a wide mesh screen which surrounds the central cavity in order to arm the porous material of which the body is made. In one embodiment, this mesh is welded to a metal washer fixed around the nozzle. To fix more firmly the porous material of which the porous body is made, at least one anchoring element is advantageously welded on the periphery of the nozzle and embedded in the porous material of said body.
Les avantages découlant de cette réalisation sont que le nez est capable de créer un nombre beaucoup plus grand de bulies, ce qui rend l'opération de bullage plus efficace, et qu'il est possible d'éviter aisément le bouchage du nez en maintenant la pression de gaz neutre dans le nez pendant un court laps de temps de façon à permettre la solidification du laitier et de l'acier. Par ailleurs , le remplacement du nez peut se faire très rapidement.The advantages deriving from this embodiment are that the nose is capable of creating a much larger number of bulbs, which makes the bubbling operation more efficient, and that it is possible to easily avoid plugging of the nose by maintaining the neutral gas pressure in the nose for a short time to allow the slag and steel to solidify. In addition, the replacement of the nose can be done very quickly.
L'invention est exposée dans ce qui suit à l'aide d'un exemple de mode d'exécution illustré sur le dessin ci-annexé.The invention is set out in the following with the aid of an exemplary embodiment illustrated in the attached drawing.
Le nez poreux comprend un corps cylindrique 1, en béton poreux par exemple, solidaire d'une buselure à filet 2 destinée à la fixation du nez à l'extrémité d'une lance de soufflage connue en soi. Le corps poreux 1 ayant par exemple un diamètre de 220 mm est formé avec une cavité centrale cylindrique 3 , de 60 mm de diamètre devant servir de chambre de compression pour un gaz neutre (argon ou azote par exemple). La chambre 3 est en communication avec l'intérieur de la buselure 2. Dans la matière du corps 1 et entourant les parois de la chambre 3 est noyé un grillage à mailles larges 4 qui sert à armer le corps ? afin de rendre celui-ci plus résistant aux manipulations et éviter les fissurations dues aux chocs thermiques.The porous nose comprises a cylindrical body 1, made of porous concrete for example, integral with a threaded
Lorsque le nez 1 fixé à l'extrémité d'une lance de soufflage est introduit dans un bain d'acier et alimenté en gaz neutre qui vient emplir la chambre de compression 3, ce gaz neutre diffuse à travers le grillage 4 et le corps poreux 1 et se répand dans le bain d'acier.When the nose 1 fixed to the end of a blowing lance is introduced into a steel bath and supplied with neutral gas which fills the compression chamber 3, this neutral gas diffuses through the screen 4 and the porous body 1 and spreads in the steel bath.
La fabrication de ce nez-poreux est simple. Sur la buselure 2 on soude une rondelle 5 sur laquelle on fixe le grillage 4. La chambre 3 est formée en passant dans l'ouverture de la buselure 2, un corps cylindrique en bois ayant le diamètre voulu pour la chambre 3 et qui dépasse la rondelle 5 d'une longueur égale à la longueur voulue pour ladite chambre de compression. Ensuite on coule le béton poreux devant former le corps 1, puis on retire le corps en bois. Sur la buselure 2 est avantageusement soudée une pièce cylindrique 6 servant d'élément d'ancrage pour fixer plus fermement le béton poreux.The fabrication of this porous nose is simple. On the
La face extérieure supérieure du corps du nez est avantageusement pourvue d'une chicane annulaire 7 pour éviter la pénétration du bain liquide le long de la jointure du nez avec la buselure 2.The upper external face of the nose body is advantageously provided with an annular baffle 7 to avoid the penetration of the liquid bath along the joint of the nose with the
Claims (4)
Priority Applications (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
AT83870064T ATE28478T1 (en) | 1982-06-25 | 1983-06-22 | POROUS SUBMERSIBLE LANCE HEAD FOR BLOWING STEEL. |
Applications Claiming Priority (2)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
BE208450 | 1982-06-25 | ||
BE0/208450A BE893651A (en) | 1982-06-25 | 1982-06-25 | POROUS NOSE FOR STEEL BALLING |
Publications (2)
Publication Number | Publication Date |
---|---|
EP0099348A1 true EP0099348A1 (en) | 1984-01-25 |
EP0099348B1 EP0099348B1 (en) | 1987-07-22 |
Family
ID=3843540
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
EP83870064A Expired EP0099348B1 (en) | 1982-06-25 | 1983-06-22 | Porous tip for an injection lance for stirring steel by injection |
Country Status (10)
Country | Link |
---|---|
US (1) | US4492365A (en) |
EP (1) | EP0099348B1 (en) |
JP (1) | JPS5910464A (en) |
AT (1) | ATE28478T1 (en) |
BE (1) | BE893651A (en) |
BR (1) | BR8303391A (en) |
CA (1) | CA1207144A (en) |
DE (1) | DE3372639D1 (en) |
ES (1) | ES285245Y (en) |
ZA (1) | ZA834666B (en) |
Cited By (2)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
EP0336050A1 (en) * | 1988-04-08 | 1989-10-11 | RECHERCHES ET DEVELOPPEMENTS DESAAR, société anonyme | Injection or blow lance |
FR2931478A1 (en) * | 2008-05-26 | 2009-11-27 | Arkema France | PRODUCT FOR PREPARING LACTAMS COMPRISING A PHOTONITROSATION STEP FOLLOWED BY A BECKMANN TRANSPOSITION STEP |
Families Citing this family (4)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
ATE29741T1 (en) * | 1982-12-17 | 1987-10-15 | Rene Desaar | POROUS GAS LANCE HEAD. |
FR2650520A1 (en) * | 1989-08-03 | 1991-02-08 | Vesuvius France Sa | KETTLE FOR REGULATING THE FLOW OF A LIQUID COMPRISING A GAS SUPPLIED FREE SPACE |
US7198206B2 (en) * | 2004-08-02 | 2007-04-03 | Clear Lam, Inc. | Compact gassing lance |
EP2089330B1 (en) * | 2006-11-02 | 2014-07-09 | Rockwool International A/S | Method and apparatus for the production of mineral fibres |
Citations (5)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
US3503597A (en) * | 1967-02-20 | 1970-03-31 | Kessler Harry Harvey | Metal treating device |
DE1961690A1 (en) * | 1968-12-03 | 1970-06-18 | Dresser Ind | Device for stirring molten metal |
LU70375A1 (en) * | 1973-07-13 | 1974-10-17 | ||
FR2384569A1 (en) * | 1977-03-26 | 1978-10-20 | Didier Werke Ag | NEW USE OF CERAMIC FIBROUS MATERIAL AND GAS INJECTION LANCE FOR THE TREATMENT OF METALLURGIC BATHS |
BE879036A (en) * | 1979-09-27 | 1980-01-16 | Desaar Rene | SQUEEGEE FOR BLOWING OR INJECTION LANCE |
Family Cites Families (6)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
FR90233E (en) * | 1966-06-27 | 1967-11-03 | Air Liquide | Improvement in injectors, nozzles and burners for metallurgical furnaces |
US3610602A (en) * | 1969-10-14 | 1971-10-05 | United States Steel Corp | Gas-permeable refractory plug and method |
GB1374586A (en) * | 1971-10-08 | 1974-11-20 | British Aluminium Co Ltd | Apparatus for introducing gas into liquid metal |
CA1002722A (en) * | 1973-10-29 | 1977-01-04 | Frank E. Carroll | Insulated roofing structure and method |
US4276331A (en) * | 1976-01-26 | 1981-06-30 | Repwell Associates, Inc. | Metal-ceramic composite and method for making same |
FR2380092A1 (en) * | 1977-02-10 | 1978-09-08 | Air Liquide | GAS INSUFFLATION ROD IN FUSION METAL |
-
1982
- 1982-06-25 BE BE0/208450A patent/BE893651A/en not_active IP Right Cessation
-
1983
- 1983-06-22 DE DE8383870064T patent/DE3372639D1/en not_active Expired
- 1983-06-22 AT AT83870064T patent/ATE28478T1/en active
- 1983-06-22 EP EP83870064A patent/EP0099348B1/en not_active Expired
- 1983-06-22 ES ES1983285245U patent/ES285245Y/en not_active Expired
- 1983-06-23 CA CA000431111A patent/CA1207144A/en not_active Expired
- 1983-06-24 BR BR8303391A patent/BR8303391A/en not_active IP Right Cessation
- 1983-06-25 JP JP58113669A patent/JPS5910464A/en active Pending
- 1983-06-27 US US06/508,165 patent/US4492365A/en not_active Expired - Fee Related
- 1983-06-27 ZA ZA834666A patent/ZA834666B/en unknown
Patent Citations (5)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
US3503597A (en) * | 1967-02-20 | 1970-03-31 | Kessler Harry Harvey | Metal treating device |
DE1961690A1 (en) * | 1968-12-03 | 1970-06-18 | Dresser Ind | Device for stirring molten metal |
LU70375A1 (en) * | 1973-07-13 | 1974-10-17 | ||
FR2384569A1 (en) * | 1977-03-26 | 1978-10-20 | Didier Werke Ag | NEW USE OF CERAMIC FIBROUS MATERIAL AND GAS INJECTION LANCE FOR THE TREATMENT OF METALLURGIC BATHS |
BE879036A (en) * | 1979-09-27 | 1980-01-16 | Desaar Rene | SQUEEGEE FOR BLOWING OR INJECTION LANCE |
Cited By (3)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
EP0336050A1 (en) * | 1988-04-08 | 1989-10-11 | RECHERCHES ET DEVELOPPEMENTS DESAAR, société anonyme | Injection or blow lance |
FR2931478A1 (en) * | 2008-05-26 | 2009-11-27 | Arkema France | PRODUCT FOR PREPARING LACTAMS COMPRISING A PHOTONITROSATION STEP FOLLOWED BY A BECKMANN TRANSPOSITION STEP |
WO2009153470A1 (en) * | 2008-05-26 | 2009-12-23 | Arkema France | Method for preparing lactames, comprising a photonitrosation step, followed by a beckmann transposition step |
Also Published As
Publication number | Publication date |
---|---|
ES285245U (en) | 1985-09-01 |
ES285245Y (en) | 1986-05-01 |
EP0099348B1 (en) | 1987-07-22 |
ZA834666B (en) | 1984-04-25 |
BE893651A (en) | 1982-12-27 |
BR8303391A (en) | 1984-02-07 |
DE3372639D1 (en) | 1987-08-27 |
CA1207144A (en) | 1986-07-08 |
JPS5910464A (en) | 1984-01-19 |
US4492365A (en) | 1985-01-08 |
ATE28478T1 (en) | 1987-08-15 |
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