EP0045365A1 - Dispositif pour introduire le métal fondu dans un moule de coulée continu dont les parois sont mobiles - Google Patents
Dispositif pour introduire le métal fondu dans un moule de coulée continu dont les parois sont mobiles Download PDFInfo
- Publication number
- EP0045365A1 EP0045365A1 EP81104544A EP81104544A EP0045365A1 EP 0045365 A1 EP0045365 A1 EP 0045365A1 EP 81104544 A EP81104544 A EP 81104544A EP 81104544 A EP81104544 A EP 81104544A EP 0045365 A1 EP0045365 A1 EP 0045365A1
- Authority
- EP
- European Patent Office
- Prior art keywords
- gap
- casting body
- casting
- mold walls
- guide rails
- 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
- 229910052751 metal Inorganic materials 0.000 title claims abstract description 26
- 239000002184 metal Substances 0.000 title claims abstract description 26
- 238000009749 continuous casting Methods 0.000 title claims abstract description 9
- 229910001338 liquidmetal Inorganic materials 0.000 claims abstract description 12
- 238000007711 solidification Methods 0.000 claims abstract description 11
- 230000008023 solidification Effects 0.000 claims abstract description 11
- 238000005266 casting Methods 0.000 claims description 65
- 239000011261 inert gas Substances 0.000 claims description 13
- 239000000463 material Substances 0.000 claims description 11
- 239000007788 liquid Substances 0.000 claims description 5
- 239000000155 melt Substances 0.000 claims description 5
- 238000013459 approach Methods 0.000 claims description 2
- 230000009970 fire resistant effect Effects 0.000 abstract 1
- 239000011248 coating agent Substances 0.000 description 4
- 238000000576 coating method Methods 0.000 description 4
- 229910000831 Steel Inorganic materials 0.000 description 3
- 230000006378 damage Effects 0.000 description 3
- 239000010959 steel Substances 0.000 description 3
- RYGMFSIKBFXOCR-UHFFFAOYSA-N Copper Chemical compound [Cu] RYGMFSIKBFXOCR-UHFFFAOYSA-N 0.000 description 2
- 229910052802 copper Inorganic materials 0.000 description 2
- 239000010949 copper Substances 0.000 description 2
- 229910002804 graphite Inorganic materials 0.000 description 2
- 239000010439 graphite Substances 0.000 description 2
- 238000000034 method Methods 0.000 description 2
- 230000000149 penetrating effect Effects 0.000 description 2
- OKTJSMMVPCPJKN-UHFFFAOYSA-N Carbon Chemical compound [C] OKTJSMMVPCPJKN-UHFFFAOYSA-N 0.000 description 1
- HCHKCACWOHOZIP-UHFFFAOYSA-N Zinc Chemical compound [Zn] HCHKCACWOHOZIP-UHFFFAOYSA-N 0.000 description 1
- 230000001476 alcoholic effect Effects 0.000 description 1
- 229910052782 aluminium Inorganic materials 0.000 description 1
- XAGFODPZIPBFFR-UHFFFAOYSA-N aluminium Chemical compound [Al] XAGFODPZIPBFFR-UHFFFAOYSA-N 0.000 description 1
- 230000033228 biological regulation Effects 0.000 description 1
- 230000001914 calming effect Effects 0.000 description 1
- 239000011195 cermet Substances 0.000 description 1
- 238000013461 design Methods 0.000 description 1
- 238000006073 displacement reaction Methods 0.000 description 1
- 230000000694 effects Effects 0.000 description 1
- 239000003925 fat Substances 0.000 description 1
- 239000011521 glass Substances 0.000 description 1
- 238000012423 maintenance Methods 0.000 description 1
- 230000014759 maintenance of location Effects 0.000 description 1
- 150000002739 metals Chemical class 0.000 description 1
- 238000012986 modification Methods 0.000 description 1
- 230000004048 modification Effects 0.000 description 1
- 239000003921 oil Substances 0.000 description 1
- 239000000843 powder Substances 0.000 description 1
- 230000036316 preload Effects 0.000 description 1
- 239000011819 refractory material Substances 0.000 description 1
- 150000003839 salts Chemical class 0.000 description 1
- 239000002893 slag Substances 0.000 description 1
- 239000004575 stone Substances 0.000 description 1
- 239000000725 suspension Substances 0.000 description 1
- 230000007704 transition Effects 0.000 description 1
- 229910052725 zinc Inorganic materials 0.000 description 1
- 239000011701 zinc 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
- B22D11/00—Continuous casting of metals, i.e. casting in indefinite lengths
- B22D11/06—Continuous casting of metals, i.e. casting in indefinite lengths into moulds with travelling walls, e.g. with rolls, plates, belts, caterpillars
- B22D11/0637—Accessories therefor
- B22D11/064—Accessories therefor for supplying molten metal
Definitions
- the invention relates to a metal inlet in continuous casting machines, comprising a fixed refractory gate member and these partially encloses Bende-mold with moving in the direction of casting Kokillendoin - have the.
- the invention has for its object to develop a metal inlet, which has a comparatively little technical effort over longer periods in the transition area between the casting body and the moving mold walls - which can be designed in particular as strips - a sufficient tightness.
- the metal inlet should be used in particular in continuous casting machines in which metals such as aluminum, copper, steel and zinc are processed.
- the technical problem underlying the invention is that the forces acting between the molten metal and the mold material or the casting body material make very small gap dimensions necessary for a purely mechanical seal; at the high casting temperatures, especially for copper and steel and their high aggressiveness for refractory materials, these cannot be maintained over the necessary period of a few hours.
- the liquid metal entering the gap between the mold walls and the casting body could indeed act as a seal when it solidifies completely; however, this solidification process is undesirable and disadvantageous, since the metal which has just solidified is continuously torn out of the gap or else grinds on the moving mold walls and would thus damage their surface. This would result in the destruction of the metal skin just created, a poor surface of the cast product and possibly damage to the continuous casting device.
- the stated object is achieved by a metal inlet of the type mentioned at the outset, which essentially has at least the features of claim 1.
- the invention then includes the knowledge that a continuous casting process under stationary conditions is only possible if no bridge of solidified metal is formed in the gap between the facing surfaces of the mold walls and the casting body. It is therefore important to prevent the metal from solidifying on the casting body, since otherwise there is a risk of bridging to the mold. So that the onset of solidification does not reach the casting body, i.e.
- a liquid area filled with liquid metal is maintained between it and the mold walls, the mold walls are equipped with a suitable heat-insulating coating and move so quickly relative to the casting body that in the
- the gap area filled with liquid metal only flows as much metal as is consumed by solidification and is carried away by the movement of the mold walls: Between the mold walls and at least the outlet area of the casting body, there is always a two-phase area in which the metal flowing into the gap due to solidification in the solidification area is just being consumed.
- the invention thus conveys the teaching that the gap deliberately set between the casting body and the moving mold walls can be automatically sealed by solidifying metal, provided that the material properties and geometric relationships of the components to be sealed off against one another and the speed of the mold walls are precisely matched to one another such that the amount of metal flowing into the gap corresponds to the solidified amount of metal conveyed out of the gap with the mold walls.
- powder and alcoholic suspensions based on glass, slag, graphite, ceramic-graphite are used as coating materials; however, the coating can also be produced using suitable salts, fats and oils.
- the gap is set so that it is not larger than two millimeters, preferably 1.5 or 1 millimeter (claims 2 to 4).
- the walls of the mold and the casting body are advantageously designed and arranged such that they run parallel to one another at least in the outlet region of the casting body.
- the gap between the casting body and the moving mold walls is preferably set to a value between 0.5 and 1 millimeter, the speed of the mold walls being between 10 and 20 meters per minute (claim 5).
- Such an embodiment is particularly suitable for casting steel.
- the guide rails can in particular also be guided movably in the casting body using spring elements.
- the guide rails can be adjusted in height within the casting body, in particular by adjusting wedges or similar remote-controlled lifting devices.
- the guide rails are expediently designed to be relatively narrow on the side facing the mold walls; their width transverse to the longitudinal direction of the casting body is preferably not more than five millimeters (claim 8)
- the outlet region of the casting body is equipped with a bore which widens in the shape of a funnel; the wall of the bore advantageously has a convex curvature, but under certain circumstances also a straight line or concave curvature.
- the curvature of the outlet area which is tailored to the casting problem, optimally achieves the following goals: high mechanical stability of the casting area of the casting body, sufficiently high thermal capacity and heat conduction to the outside, i.e. in the direction of the mold, and extensive calming of the turbulent flow.
- the outlet area and the remaining area of the pouring body are expediently connected to one another in a manner which permits thermally induced dimensional changes (claim 14); in particular, the two areas of the casting body can be fastened to one another by plug connections.
- Si S N 4 , BN or cermet are used in particular as suitable materials for the exit area; the rest of the casting body can be made in particular of refractory high-alumina ceramic, such as silimanite stone.
- the above-mentioned connection which permits displacements is particularly advantageous if the outlet region of the cast-in body - in contrast to its remaining region - consists of a material with good thermal conductivity (claim 17).
- the gap in the outlet region of the casting body is advantageously filled with inert gas; the inert gas pressure is chosen so that its size is slightly below that of the metallostatic pressure of the melt in the outlet area (claim 15). Since the inert gas pressure is always lower than the already mentioned metallostatic pressure of the melt, the inert gas cannot the liquid metal and get into the casting line.
- An embodiment of the subject matter of the invention with an inert gas seal preferably additionally has the features of claim 16.
- the metal inlet according to the invention has, as essential components, band-shaped mold walls 2 moved in the direction of arrow 1 and a fixed casting body 3, which in turn is composed of an outlet area 4 and a rear remaining area 5.
- the areas 4 and 5 consist of a material with good (area 4) or with low (area 5) thermal conductivity.
- the liquid metal to be cast is introduced in the direction of arrow 6 through a bore 7 in the casting body 3 between the moving mold walls 2; the solidification range emanating from this is denoted by 8.
- the operating conditions prevailing during the casting process are thus selected such that just as much liquid metal flows in through the gap-shaped liquid region 8 'as there is after the solidification on the mold walls 2 due to their movement to the right (arrow 1).
- the casting body 3 on the side facing the mold walls 2 (that is to say in the region of the outer surfaces 4 'and 5' in FIG. 1) is equipped with guide rails 10 on which the Support mold walls 2 with a low preload (see Fig. 2).
- the width b of these guide rails. is preferably not more than five millimeters, their mutual distance a transverse to the longitudinal direction of the pouring body 3 is not more than two hundred millimeters.
- the guide rails 10 - viewed in the direction of the longitudinal axis 7 '(or in the direction of the arrows 1 and 6) - come as close as possible to the exit edge 4 "of the exit area 4; however, their distance from this exit edge must be dimensioned in such a way that 1 - which extends into the gap 9 - the distance c of the front edges of the guide rails 10 from the trailing edge 4 "is therefore not less than thirty millimeters (cf. FIG. 1).
- the outlet area 4 of the casting body 3 is equipped with an annular channel 11, through which inert gas is guided into the gap between the components 2 and 4.
- the annular channel 11 communicates through a supply line 12 with a not shown inert gas in V e r retention.
- the pressure of the inert gas is such that it is constantly slightly below the value of the metallostatic pressure in the melt in the area of the outlet edge 4 "of the outlet area 4.
- the inert gas present prevents the melt from penetrating too far into the gap between the components 2 and 4, without the risk of storing inert gas in the casting line.
- the annular channel 11 On the rearward side facing away from the exit edge 4 ′′, the annular channel 11 is closed by a seal 13 which is in contact with the mold walls 2 at the same time.
- the subject matter of the invention is not limited to use in connection with belt-shaped mold walls; it can also interact with mold walls of a different design.
Landscapes
- Engineering & Computer Science (AREA)
- Mechanical Engineering (AREA)
- Continuous Casting (AREA)
- Molds, Cores, And Manufacturing Methods Thereof (AREA)
- Catching Or Destruction (AREA)
- Feeding And Watering For Cattle Raising And Animal Husbandry (AREA)
- Dental Prosthetics (AREA)
- Casting Support Devices, Ladles, And Melt Control Thereby (AREA)
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| AT81104544T ATE6215T1 (de) | 1980-08-01 | 1981-06-12 | Metalleinlauf in stranggiessvorrichtungen mit bewegten kokillenwaenden. |
Applications Claiming Priority (2)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| DE3029223 | 1980-08-01 | ||
| DE3029223A DE3029223C2 (de) | 1980-08-01 | 1980-08-01 | Einlauf für die Metallschmelze in Stranggießvorrichtungen |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| EP0045365A1 true EP0045365A1 (fr) | 1982-02-10 |
| EP0045365B1 EP0045365B1 (fr) | 1984-02-15 |
Family
ID=6108679
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| EP81104544A Expired EP0045365B1 (fr) | 1980-08-01 | 1981-06-12 | Dispositif pour introduire le métal fondu dans un moule de coulée continu dont les parois sont mobiles |
Country Status (9)
| Country | Link |
|---|---|
| EP (1) | EP0045365B1 (fr) |
| JP (1) | JPS5752549A (fr) |
| AT (1) | ATE6215T1 (fr) |
| BR (1) | BR8104956A (fr) |
| CA (1) | CA1182617A (fr) |
| DD (1) | DD201650A5 (fr) |
| DE (2) | DE3029223C2 (fr) |
| ES (1) | ES8205366A1 (fr) |
| ZA (1) | ZA815269B (fr) |
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| EP0148384A1 (fr) * | 1983-12-20 | 1985-07-17 | Fried. Krupp Gesellschaft mit beschränkter Haftung | Zone d'admission pour le métal liquide dans des installations de coulée continue avec une buse de coulée fixe réfractaire et lingotière avec parois mobiles uniquement dans la direction de coulée |
| EP0149164A3 (en) * | 1984-01-13 | 1985-08-21 | Fried. Krupp Gesellschaft Mit Beschrankter Haftung | Pouring nozzle consisting of several longitudinal sections for supplying liquid metal into the mould for continuous casting and process of making such a nozzle |
| US4785873A (en) * | 1986-03-10 | 1988-11-22 | Larex Ag | Sealing between a casting nozzle and at least one continuous traveling casting belt |
Families Citing this family (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| DE3325716C2 (de) * | 1983-07-16 | 1985-08-14 | Fried. Krupp Gmbh, 4300 Essen | Gießdüsen-Mundstück für Stahlschmelze verarbeitende Stranggießkokillen mit in Gießrichtung mitlaufenden Kokillenwänden |
| DE3403152C2 (de) * | 1984-01-31 | 1986-02-20 | Fried. Krupp Gmbh, 4300 Essen | Verfahren zum Zuführen von Stahlschmelze aus einem Zwischenbehälter in eine Doppelbandstranggießkokille und Zwischenbehälter zur Durchführung des Verfahrens |
| CA2517447C (fr) * | 1994-07-19 | 2007-05-29 | Alcan International Limited | Processus et appareil de coulage d'une bande de metal, et injecteur connexe |
| AT405254B (de) * | 1996-02-20 | 1999-06-25 | Hulek Anton | Raupenkokille für eine stranggussanlage |
Citations (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| FR1094517A (fr) * | 1953-11-25 | 1955-05-20 | Installation de coulée pour métaux en fusion | |
| CH508433A (de) * | 1970-06-24 | 1971-06-15 | Prolizenz Ag C O Schweiz Kredi | Düse für die Zuführung des geschmolzenen Metalles beim Bandgiessen in Raupenkokille |
| FR2121418A1 (en) * | 1971-01-12 | 1972-08-25 | Technicon Instr | Horizontal continuous casting |
| FR2389434A1 (fr) * | 1977-05-05 | 1978-12-01 | Prolizenz Ag |
Family Cites Families (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US3598173A (en) * | 1968-10-17 | 1971-08-10 | Olin Mathieson | Continuous casting machine having a variable mold length and adapted for casting in a variety of sizes at high speed |
-
1980
- 1980-08-01 DE DE3029223A patent/DE3029223C2/de not_active Expired
-
1981
- 1981-06-12 AT AT81104544T patent/ATE6215T1/de not_active IP Right Cessation
- 1981-06-12 DE DE8181104544T patent/DE3162265D1/de not_active Expired
- 1981-06-12 EP EP81104544A patent/EP0045365B1/fr not_active Expired
- 1981-07-08 ES ES503761A patent/ES8205366A1/es not_active Expired
- 1981-07-30 DD DD81232223A patent/DD201650A5/de unknown
- 1981-07-30 JP JP56118565A patent/JPS5752549A/ja active Pending
- 1981-07-31 BR BR8104956A patent/BR8104956A/pt unknown
- 1981-07-31 ZA ZA815269A patent/ZA815269B/xx unknown
- 1981-07-31 CA CA000382933A patent/CA1182617A/fr not_active Expired
Patent Citations (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| FR1094517A (fr) * | 1953-11-25 | 1955-05-20 | Installation de coulée pour métaux en fusion | |
| CH508433A (de) * | 1970-06-24 | 1971-06-15 | Prolizenz Ag C O Schweiz Kredi | Düse für die Zuführung des geschmolzenen Metalles beim Bandgiessen in Raupenkokille |
| FR2121418A1 (en) * | 1971-01-12 | 1972-08-25 | Technicon Instr | Horizontal continuous casting |
| FR2389434A1 (fr) * | 1977-05-05 | 1978-12-01 | Prolizenz Ag |
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| EP0148384A1 (fr) * | 1983-12-20 | 1985-07-17 | Fried. Krupp Gesellschaft mit beschränkter Haftung | Zone d'admission pour le métal liquide dans des installations de coulée continue avec une buse de coulée fixe réfractaire et lingotière avec parois mobiles uniquement dans la direction de coulée |
| EP0149164A3 (en) * | 1984-01-13 | 1985-08-21 | Fried. Krupp Gesellschaft Mit Beschrankter Haftung | Pouring nozzle consisting of several longitudinal sections for supplying liquid metal into the mould for continuous casting and process of making such a nozzle |
| US4785873A (en) * | 1986-03-10 | 1988-11-22 | Larex Ag | Sealing between a casting nozzle and at least one continuous traveling casting belt |
Also Published As
| Publication number | Publication date |
|---|---|
| CA1182617A (fr) | 1985-02-19 |
| ZA815269B (en) | 1982-10-27 |
| JPS5752549A (en) | 1982-03-29 |
| DE3029223A1 (de) | 1982-11-04 |
| EP0045365B1 (fr) | 1984-02-15 |
| ES503761A0 (es) | 1982-06-01 |
| ATE6215T1 (de) | 1984-03-15 |
| DE3162265D1 (en) | 1984-03-22 |
| ES8205366A1 (es) | 1982-06-01 |
| DD201650A5 (de) | 1983-08-03 |
| BR8104956A (pt) | 1982-04-20 |
| DE3029223C2 (de) | 1984-09-27 |
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