CA2224537A1 - Process for regulating the temperature and making uniform the temperature profile of a molten metal billet - Google Patents
Process for regulating the temperature and making uniform the temperature profile of a molten metal billet Download PDFInfo
- Publication number
- CA2224537A1 CA2224537A1 CA002224537A CA2224537A CA2224537A1 CA 2224537 A1 CA2224537 A1 CA 2224537A1 CA 002224537 A CA002224537 A CA 002224537A CA 2224537 A CA2224537 A CA 2224537A CA 2224537 A1 CA2224537 A1 CA 2224537A1
- Authority
- CA
- Canada
- Prior art keywords
- billet
- inductor
- temperature
- outlet
- agitating
- 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
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
- B22D11/04—Continuous casting of metals, i.e. casting in indefinite lengths into open-ended moulds
- B22D11/045—Continuous casting of metals, i.e. casting in indefinite lengths into open-ended moulds for horizontal casting
-
- 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
- B22D41/60—Pouring-nozzles with heating or cooling means
-
- 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
- B22D11/04—Continuous casting of metals, i.e. casting in indefinite lengths into open-ended moulds
- B22D11/049—Continuous casting of metals, i.e. casting in indefinite lengths into open-ended moulds for direct chill casting, e.g. electromagnetic casting
-
- 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
- B22D11/10—Supplying or treating molten metal
- B22D11/11—Treating the molten metal
- B22D11/114—Treating the molten metal by using agitating or vibrating means
- B22D11/115—Treating the molten metal by using agitating or vibrating means by using magnetic fields
-
- 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
- B22D41/62—Pouring-nozzles with stirring or vibrating means
Landscapes
- Engineering & Computer Science (AREA)
- Mechanical Engineering (AREA)
- Continuous Casting (AREA)
- Casting Support Devices, Ladles, And Melt Control Thereby (AREA)
- General Induction Heating (AREA)
Abstract
Process for regulating the temperature and making uniform the temperature profile of a molten metal billet A process for regulating the temperature and making uniform the temperature profile of a molten metal billet, in particular of a steel billet, during its flow through an outlet in a metallurgical vessel is proposed, wherein the billet in the outlet is heated up through inductive electromagnetic coupling of the outlet and/or of the billet by means of an electromagnetic ac field and is agitated through inductive coupling of the billet by means of at least one spatially variable magnetic field.
Description
CA 02224~37 1997-12-11 Process of regulating the temperature and making uniform the temperature profile of a molten metal billet Speclflcation The invention relates to a process for regulating the temperature and for making uniform the temperature profile of a molten metal billet, in particular of a steel billet, when flowing through an outlet in a metallurgical vessel.
In DE 44 28 297 Al is described a process for castlng a metal melt from a metallurgical vessel. Within the bottom of the vessel are disposed an inductor and an outlet nozzle. For heating the outlet nozzle and/or for onset casting the inductor is switched on whereby the nozzle is heated inductively. During casting operation the inductor can continue to operate. Making the temperature profile of the melt in the outlet uniform and the inductive coupling of the melt to the electromagnetic field of the inductor is not provided.
In the technical work "Metallurgie des Stranggie~ens" ["Metallurgy of Continuous Casting"~, K.
Schwerdtfeger, editor, Stahl-Eisen, Dusseldorf 1992, pp. 449, the electromagnetic agitating during the continuous casting is described. By agitating the melt the solidification process is influenced such that a dentritic structure is interrupted and a globulitic structure is preferably attained (cf. p.
472). The agitators generate a spatially variable magnetic field. From the cited technlcal work are known rotating field agltators, linear fleld agltators and hellcoldal agltators (cf. pp. 473). These agitators are disposed within or, in the CA 02224~37 1997-12-11 dlrection of casting, under an ingot mold.
In the bibliographic reference ISIJ International, Vol. 36 (1996), No. 5, pp. 487-492 are described multlfrequency agitators.
In DE 195 00 012 A1 is described a regulation and closure device for a metallurgical vessel which operates with a rotor and a stator (pipe-in-pipe closure system). Depending on the material selection for the rotor elther it or the melt flowing through lt is coupled to the electromagnetic field of an inductor.
In the case of contlnuous horizontal casting machlnes the outlet shell(s) extend into a sidewall of the melt container. The outlet shell(s) are flanged onto an ingot mold so that the melt flows horizontally through the outlet shell(s) into the ingot mold. In the metallurgical vessel (distributor) perforce a specific temperature gradient develops. In the liquid metal flowing through the outlet shell this results in so-called temperature streaks or "black stripes", thus in a nonuniform temperature profile which causes a quality reduction of the steel product.
It is the task of the inventlon to avoid in the outlet a decrease of the temperature and a nonuniform temperature profile of the melt flowing through it.
The above task is solved according to the invention through the characteristics of claim 1. By "billet" is here not understood a continuous casting billet leaving an ingot mold and solidifylng but rather the melt flowing in the outflow region of the metallurglcal vessel which enters the CA 02224~37 1997-12-11 ingot mold horlzontally during contlnuous horlzontal casting.
The heatlng ensures that the temperature profile of the blllet does not become even more nonunlform in the outlet as lt potentially enters from the metallurglcal vessel lnto the outflow. Moreover, through the heatlng ls achleved that the temperature of the blllet ln the outlet does not, or only lnslgnlflcantly, decrease. The heating of the billet can take place thereby that the blllet ltself ls lnductively coupled to the electromagnetlc ac fleld and/or the outlet becomes coupled and heat through heat conductlon and~or heat radlatlon ls transferred to the blllet.
Through the electromagnetlc agltatlon of the blllet lts temperature proflle becomes unlform in the outlet such that across the cross section of the billet at all locations essentlally the same temperature obtalns.
The descrlbed measures lead to an improvement of the quallty ln partlcular by lmprovlng the surface of the product of the contlnuous castlng.
Advantageous embodlments of the lnventlon are descrlbed in the dependent clalms and the followlng descrlptlon of embodlment examples.
In the drawlng deplct:
Flgure 1 a partlal sectlon of a metallurglcal vessel wlth two lnductor reglons at an lngot mold of a horlzontal contlnuous castlng machlne and Flgure 2 a metallurglcal vessel wlth one lnductor at an lngot mold of a horlzontal contlnuous castlng machlne.
In a sldewall 1 or a metallurglcal vessel whose CA 02224~37 1997-12-11 lnterlor volume ls denoted by 2, an lnductor 4 is dlsposed ln a flrebrlck sleeve 3. The lnductor 4 ls cooled vla plpellnes 13 wlth water and/or alr. Accordlng to Figure 1 the inductor 4 ls dlvided lnto two inductor regions wherein the one inductor region is connected through electrlcal terminals 14, 15 to a frequency converter or changer 5T and the other inductor region through terminals 16, 17 to a further converter or changer 5R. The frequencies F and the powers L
of the converters or changers are settable.
The inductor 4 is disposed about an intermediate shell 6 which serves for temperature insulatlon and the lntroduclbllity of an outlet shell 9. The outlet shell g is flanged so as to be exchangeable by means of a holding device 8 to an lngot mold 7 associated with the metallurglcal vessel.
In the Flgures only one outlet shell ls shown. Further outlet shells disposed in the same way on the lngot mold 7 are potentlally dlsposed behind the plane of drawing. In the representation according to the Figures the outlet shell(s) 9 borne by the ingot mold 7 are slid into the intermediate shell 6 through horizontal movement of the lngot mold 7. A cement layer 10 serves as a seallng between outlet shell 9 and lntermedlate shell 6.
The outlet shell 9 representlng an abraslon part comprlses a carbon-bound, alumlna-comprlsing ceramlc materlal whlch becomes lnductlvely coupled to an electromagnetic field of the lnductor 4. The outlet shell 9 forms a throughflow cross sectlon 11 for the steel melt flowlng from the lnterlor volume 2 of the metallurglcal vessel into the lngot mold 7.
CA 02224~37 1997-12-11 The flowlng-through takes place in the horlzontal direction H.
By 12 is denoted the wall thickness of the outlet shell 9.
In the embodiment example according to Figure 1 the inductor region connected to the frequency converter or changer 5T serves for heating up the outlet shell 9 before and during the onset casting and the heating, respectively the temperature regulation of the molten metal billet, in partlcular of a steel billet, flowlng through the throughflow cross sectlon ll. Thls lnductor reglon ls supplled with alternatlng current by the converter or changer 5T and generates a correspondlng electromagnetic ac field and encompasses in the form of a coil the outlet shell 9.
The inductor region connected to the converter or changer 5R serves for agitating the melt in the throughflow cross section 11. Through the corresponding driving from converter or changer 5R, thls inductor region generates in the blllet ln the throughflow cross section 11 a spatially variable magnetlc field which leads to an agltation effect.
This inductor reglon can be structured of one or several colls wherein the coils can also be distributed on the circumference of the outlet shell 9. This inductor region is preferably structured as a rotating field agltator or hellcoidal agitator or also as linear travelllng field agltator as ls descrlbed ln the prevlously cited technlcal work. It ls structured such that the metal melt S entering from the lnterlor volume 2 lnto the outlet shell 9 is swirled through such that across the throughflow cross section 11 a temperature profile of maximum possible uniformity is generated in the billet.
CA 02224~37 1997-12-11 In the embodlment example accordlng to Figure 1 the agltatlng lnductor reglon connected wlth the converter or changer 5R ls disposed, in the dlrection of flow 11, before the heatlng lnductor reglon connected with the converter or changer 5T. This ls advantageous because thereln the already agltated blllet ls after heated. However, the reverse configuratlon would also be posslble.
In the embodlment accordlng to Figure 1 the inductor connected to the converter or changer 5R can be used during the onset casting or also for heatlng the outlet shell 9 if the frequency and/or power of the converter or changer 5R ls set correspondingly.
In the embodlment example according to Figure 2 only one lnductor ls provlded whlch ls connected by means of the electrlc termlnals 14, 15 with the converter or changer 5TR, whose power and frequency are settable. The inductor 4 ls therein driven by the converter or changer 5TR such that it assumes the functlons: agitatlng the blllet and heatlng the billet. Thls can take place thereby that the converter or changer 5TR ls cyclically driven at agitating frequency, agltatlng power and heatlng frequency, heating power. This can also take place thereby that, as descrlbed in the previously cited bibliographic reference, a converter or changer 5TR is used which supplies the lnductor(s) wlth a multlfrequency alternatlng current whereln the frequencles are superlmposed. Through the correspondlng settlng of frequency or power lt ls also posslble to preheat the outlet shell 9 for the onset castlng.
CA 02224~37 1997-12-11 In both embodiment examples the agitation of the billet preferably takes place wlth a lower frequency than does the heating-up of the blllet. The electromagnetic flelds for heating-up and agitation can be superimposed in time and/or space.
In the throughflow cross section 11 the billet, due to the temperature layering in the lnterior volume 2 of the metallurgical vessel, has a lower temperature than further up.
In order to counteract this durlng the heating-up, the inductor 4 or, ln the embodlment example accordlng to Figure 1, the inductor reglon connected to the converter or the changer 5T underneath the center axis H of the throughflow cross sectlon 11 ls spaced less far apart from it ~the axis]
than above the center axis H.
The operating function is substantially the following At the latest after the ingot mold 7 wlth the outlet shell(s) 9 has been brought lnto the posltlon deplcted in the Figures at the still empty metallurgical vessel, the inductor 4 is switched on by means of the converter or changer 5T or 5TR, respectlvely, for heating up the outlet shells to operating temperature. Thereln by means of the converter or changer 5 a frequency and an electrlc power ls set which brings the outlet shell 9, lf required, to approximately liquid temperature of the provlded metal melt. Subsequently, metal melt S ls poured lnto the lnterlor volume 2 of the metallurgical vessel. Thls flows as liquld blllet through the outlet shell 9 lnto the lngot mold 7. In the process lt can CA 02224~37 1997-12-11 not freeze in the outlet shell 9 because such ls heated to the corresponding hlgh temperature. After the onset casting the frequencies of the converter or changer 5T, 5R, or respectlvely of the converter or changer 5TR, are set for castlng the llquld steel such that the electromagnetlc flelds penetrate the wall thlckness 12 of the outlet shell 9 and have on the blllet, on the one hand, an agitating effect and, on the other hand, a heating effect. The heating effect can therein also take place indirectly thereby that the outlet shell 9 heating up in the electromagnetic field transfers heat onto the billet.
In DE 44 28 297 Al is described a process for castlng a metal melt from a metallurgical vessel. Within the bottom of the vessel are disposed an inductor and an outlet nozzle. For heating the outlet nozzle and/or for onset casting the inductor is switched on whereby the nozzle is heated inductively. During casting operation the inductor can continue to operate. Making the temperature profile of the melt in the outlet uniform and the inductive coupling of the melt to the electromagnetic field of the inductor is not provided.
In the technical work "Metallurgie des Stranggie~ens" ["Metallurgy of Continuous Casting"~, K.
Schwerdtfeger, editor, Stahl-Eisen, Dusseldorf 1992, pp. 449, the electromagnetic agitating during the continuous casting is described. By agitating the melt the solidification process is influenced such that a dentritic structure is interrupted and a globulitic structure is preferably attained (cf. p.
472). The agitators generate a spatially variable magnetic field. From the cited technlcal work are known rotating field agltators, linear fleld agltators and hellcoldal agltators (cf. pp. 473). These agitators are disposed within or, in the CA 02224~37 1997-12-11 dlrection of casting, under an ingot mold.
In the bibliographic reference ISIJ International, Vol. 36 (1996), No. 5, pp. 487-492 are described multlfrequency agitators.
In DE 195 00 012 A1 is described a regulation and closure device for a metallurgical vessel which operates with a rotor and a stator (pipe-in-pipe closure system). Depending on the material selection for the rotor elther it or the melt flowing through lt is coupled to the electromagnetic field of an inductor.
In the case of contlnuous horizontal casting machlnes the outlet shell(s) extend into a sidewall of the melt container. The outlet shell(s) are flanged onto an ingot mold so that the melt flows horizontally through the outlet shell(s) into the ingot mold. In the metallurgical vessel (distributor) perforce a specific temperature gradient develops. In the liquid metal flowing through the outlet shell this results in so-called temperature streaks or "black stripes", thus in a nonuniform temperature profile which causes a quality reduction of the steel product.
It is the task of the inventlon to avoid in the outlet a decrease of the temperature and a nonuniform temperature profile of the melt flowing through it.
The above task is solved according to the invention through the characteristics of claim 1. By "billet" is here not understood a continuous casting billet leaving an ingot mold and solidifylng but rather the melt flowing in the outflow region of the metallurglcal vessel which enters the CA 02224~37 1997-12-11 ingot mold horlzontally during contlnuous horlzontal casting.
The heatlng ensures that the temperature profile of the blllet does not become even more nonunlform in the outlet as lt potentially enters from the metallurglcal vessel lnto the outflow. Moreover, through the heatlng ls achleved that the temperature of the blllet ln the outlet does not, or only lnslgnlflcantly, decrease. The heating of the billet can take place thereby that the blllet ltself ls lnductively coupled to the electromagnetlc ac fleld and/or the outlet becomes coupled and heat through heat conductlon and~or heat radlatlon ls transferred to the blllet.
Through the electromagnetlc agltatlon of the blllet lts temperature proflle becomes unlform in the outlet such that across the cross section of the billet at all locations essentlally the same temperature obtalns.
The descrlbed measures lead to an improvement of the quallty ln partlcular by lmprovlng the surface of the product of the contlnuous castlng.
Advantageous embodlments of the lnventlon are descrlbed in the dependent clalms and the followlng descrlptlon of embodlment examples.
In the drawlng deplct:
Flgure 1 a partlal sectlon of a metallurglcal vessel wlth two lnductor reglons at an lngot mold of a horlzontal contlnuous castlng machlne and Flgure 2 a metallurglcal vessel wlth one lnductor at an lngot mold of a horlzontal contlnuous castlng machlne.
In a sldewall 1 or a metallurglcal vessel whose CA 02224~37 1997-12-11 lnterlor volume ls denoted by 2, an lnductor 4 is dlsposed ln a flrebrlck sleeve 3. The lnductor 4 ls cooled vla plpellnes 13 wlth water and/or alr. Accordlng to Figure 1 the inductor 4 ls dlvided lnto two inductor regions wherein the one inductor region is connected through electrlcal terminals 14, 15 to a frequency converter or changer 5T and the other inductor region through terminals 16, 17 to a further converter or changer 5R. The frequencies F and the powers L
of the converters or changers are settable.
The inductor 4 is disposed about an intermediate shell 6 which serves for temperature insulatlon and the lntroduclbllity of an outlet shell 9. The outlet shell g is flanged so as to be exchangeable by means of a holding device 8 to an lngot mold 7 associated with the metallurglcal vessel.
In the Flgures only one outlet shell ls shown. Further outlet shells disposed in the same way on the lngot mold 7 are potentlally dlsposed behind the plane of drawing. In the representation according to the Figures the outlet shell(s) 9 borne by the ingot mold 7 are slid into the intermediate shell 6 through horizontal movement of the lngot mold 7. A cement layer 10 serves as a seallng between outlet shell 9 and lntermedlate shell 6.
The outlet shell 9 representlng an abraslon part comprlses a carbon-bound, alumlna-comprlsing ceramlc materlal whlch becomes lnductlvely coupled to an electromagnetic field of the lnductor 4. The outlet shell 9 forms a throughflow cross sectlon 11 for the steel melt flowlng from the lnterlor volume 2 of the metallurglcal vessel into the lngot mold 7.
CA 02224~37 1997-12-11 The flowlng-through takes place in the horlzontal direction H.
By 12 is denoted the wall thickness of the outlet shell 9.
In the embodiment example according to Figure 1 the inductor region connected to the frequency converter or changer 5T serves for heating up the outlet shell 9 before and during the onset casting and the heating, respectively the temperature regulation of the molten metal billet, in partlcular of a steel billet, flowlng through the throughflow cross sectlon ll. Thls lnductor reglon ls supplled with alternatlng current by the converter or changer 5T and generates a correspondlng electromagnetic ac field and encompasses in the form of a coil the outlet shell 9.
The inductor region connected to the converter or changer 5R serves for agitating the melt in the throughflow cross section 11. Through the corresponding driving from converter or changer 5R, thls inductor region generates in the blllet ln the throughflow cross section 11 a spatially variable magnetlc field which leads to an agltation effect.
This inductor reglon can be structured of one or several colls wherein the coils can also be distributed on the circumference of the outlet shell 9. This inductor region is preferably structured as a rotating field agltator or hellcoidal agitator or also as linear travelllng field agltator as ls descrlbed ln the prevlously cited technlcal work. It ls structured such that the metal melt S entering from the lnterlor volume 2 lnto the outlet shell 9 is swirled through such that across the throughflow cross section 11 a temperature profile of maximum possible uniformity is generated in the billet.
CA 02224~37 1997-12-11 In the embodlment example accordlng to Figure 1 the agltatlng lnductor reglon connected wlth the converter or changer 5R ls disposed, in the dlrection of flow 11, before the heatlng lnductor reglon connected with the converter or changer 5T. This ls advantageous because thereln the already agltated blllet ls after heated. However, the reverse configuratlon would also be posslble.
In the embodlment accordlng to Figure 1 the inductor connected to the converter or changer 5R can be used during the onset casting or also for heatlng the outlet shell 9 if the frequency and/or power of the converter or changer 5R ls set correspondingly.
In the embodlment example according to Figure 2 only one lnductor ls provlded whlch ls connected by means of the electrlc termlnals 14, 15 with the converter or changer 5TR, whose power and frequency are settable. The inductor 4 ls therein driven by the converter or changer 5TR such that it assumes the functlons: agitatlng the blllet and heatlng the billet. Thls can take place thereby that the converter or changer 5TR ls cyclically driven at agitating frequency, agltatlng power and heatlng frequency, heating power. This can also take place thereby that, as descrlbed in the previously cited bibliographic reference, a converter or changer 5TR is used which supplies the lnductor(s) wlth a multlfrequency alternatlng current whereln the frequencles are superlmposed. Through the correspondlng settlng of frequency or power lt ls also posslble to preheat the outlet shell 9 for the onset castlng.
CA 02224~37 1997-12-11 In both embodiment examples the agitation of the billet preferably takes place wlth a lower frequency than does the heating-up of the blllet. The electromagnetic flelds for heating-up and agitation can be superimposed in time and/or space.
In the throughflow cross section 11 the billet, due to the temperature layering in the lnterior volume 2 of the metallurgical vessel, has a lower temperature than further up.
In order to counteract this durlng the heating-up, the inductor 4 or, ln the embodlment example accordlng to Figure 1, the inductor reglon connected to the converter or the changer 5T underneath the center axis H of the throughflow cross sectlon 11 ls spaced less far apart from it ~the axis]
than above the center axis H.
The operating function is substantially the following At the latest after the ingot mold 7 wlth the outlet shell(s) 9 has been brought lnto the posltlon deplcted in the Figures at the still empty metallurgical vessel, the inductor 4 is switched on by means of the converter or changer 5T or 5TR, respectlvely, for heating up the outlet shells to operating temperature. Thereln by means of the converter or changer 5 a frequency and an electrlc power ls set which brings the outlet shell 9, lf required, to approximately liquid temperature of the provlded metal melt. Subsequently, metal melt S ls poured lnto the lnterlor volume 2 of the metallurgical vessel. Thls flows as liquld blllet through the outlet shell 9 lnto the lngot mold 7. In the process lt can CA 02224~37 1997-12-11 not freeze in the outlet shell 9 because such ls heated to the corresponding hlgh temperature. After the onset casting the frequencies of the converter or changer 5T, 5R, or respectlvely of the converter or changer 5TR, are set for castlng the llquld steel such that the electromagnetlc flelds penetrate the wall thlckness 12 of the outlet shell 9 and have on the blllet, on the one hand, an agitating effect and, on the other hand, a heating effect. The heating effect can therein also take place indirectly thereby that the outlet shell 9 heating up in the electromagnetic field transfers heat onto the billet.
Claims (9)
1. Process for regulating the temperature and making uniform the temperature profile of a molten metal billet, in particular of a steel billet, when flowing through an outlet in a metallurgical vessel, wherein the billet in the region of the outlet is heated by inductive electromagnetic coupling of the outlet and/or of the billet by means of an electromagnetic ac field and is agitated through the inductive coupling of the billet by means of at least one spatially variable magnetic field.
2. Process as claimed in claim 1, characterized in that of several inductors or of several inductor regions of an inductor electromagnetic fields are used for heating and/or agitating of the billet.
3. Process as claimed in claim 1, characterized in that one inductor with several superimposed electromagnetic fields is used for heating and agitating the billet.
4. Process as claimed in one of the preceding claims, characterized in that the heating is influenced through the differentially spacing of the inductor or an inductor region from the center axis of the billet.
5. Process as claimed in claim 4, characterized in that during horizontal continuous casting the billet is heated more strongly in its lower region than in its upper region.
6. Process as claimed in one of the preceding claims, characterized in that the agitating is carried out by means of a rotating field agitator or a linear travelling field agitator.
7. Process as claimed in one of the preceding claims 1 to 5, characterized in that the agitating is carried out by means of a helicoidal agitator.
8. Process as claimed in one of the preceding claims, characterized in that lower frequencies are used for the agitating than for the heating.
9. Use of fluid-cooled, in particular compressed-air and/or water-cooled, inductors and/or agitators for carrying out the process as claimed in claim 1 to 8.
Applications Claiming Priority (2)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| DE19651531.9 | 1996-12-11 | ||
| DE19651531A DE19651531C2 (en) | 1996-12-11 | 1996-12-11 | Process for regulating the temperature and for uniformizing the temperature profile of a molten, metallic strand |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CA2224537A1 true CA2224537A1 (en) | 1998-06-11 |
Family
ID=7814388
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CA002224537A Abandoned CA2224537A1 (en) | 1996-12-11 | 1997-12-11 | Process for regulating the temperature and making uniform the temperature profile of a molten metal billet |
Country Status (5)
| Country | Link |
|---|---|
| EP (1) | EP0847819A1 (en) |
| JP (1) | JPH10175047A (en) |
| KR (1) | KR19980063887A (en) |
| CA (1) | CA2224537A1 (en) |
| DE (1) | DE19651531C2 (en) |
Families Citing this family (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN101039768A (en) * | 2004-09-13 | 2007-09-19 | 动力技术有限责任公司 | Methods and facilities for suppressing vortices arising in tundishes or ladles during their respective discharge |
| JP4505536B2 (en) * | 2008-07-08 | 2010-07-21 | 新日本製鐵株式会社 | Slab surface temperature measuring device and slab surface temperature measuring method |
Family Cites Families (8)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| FR2252154B1 (en) * | 1973-11-28 | 1976-12-03 | Siderurgie Fse Inst Rech | |
| CH604974A5 (en) * | 1976-12-17 | 1978-09-15 | Concast Ag | |
| DE3527387A1 (en) * | 1985-07-31 | 1987-02-26 | Klaus Prof Dr In Schwerdtfeger | Method for the electromagnetic stirring of metallic melts |
| SU1766616A1 (en) * | 1990-10-23 | 1992-10-07 | Научно-исследовательский институт технологии машиностроения | Melting-casting plant |
| JPH04197559A (en) * | 1990-11-27 | 1992-07-17 | Nkk Corp | Continuous casting method for steel |
| DE4136066A1 (en) * | 1991-11-01 | 1993-05-06 | Didier-Werke Ag, 6200 Wiesbaden, De | Outlet improved arrangement for metallurgical vessel - comprises sleeve and surrounding cooled induction coil of truncated conical form, with oil axially adjustable to vary gap to freeze or melt metal |
| DE4428297A1 (en) * | 1994-08-10 | 1996-02-15 | Didier Werke Ag | Refractory nozzle for pouring molten metal from a vessel |
| DE19500012A1 (en) * | 1995-01-02 | 1996-07-04 | Didier Werke Ag | Control and closure device for a metallurgical vessel |
-
1996
- 1996-12-11 DE DE19651531A patent/DE19651531C2/en not_active Expired - Fee Related
-
1997
- 1997-12-02 EP EP97121152A patent/EP0847819A1/en not_active Withdrawn
- 1997-12-08 KR KR1019970066657A patent/KR19980063887A/en not_active Application Discontinuation
- 1997-12-10 JP JP9369696A patent/JPH10175047A/en active Pending
- 1997-12-11 CA CA002224537A patent/CA2224537A1/en not_active Abandoned
Also Published As
| Publication number | Publication date |
|---|---|
| DE19651531C2 (en) | 1999-01-14 |
| KR19980063887A (en) | 1998-10-07 |
| EP0847819A1 (en) | 1998-06-17 |
| JPH10175047A (en) | 1998-06-30 |
| DE19651531A1 (en) | 1998-06-18 |
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| Date | Code | Title | Description |
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| FZDE | Dead |