CA1064669A - Continuous casting machine for casting steel - Google Patents
Continuous casting machine for casting steelInfo
- Publication number
- CA1064669A CA1064669A CA267,536A CA267536A CA1064669A CA 1064669 A CA1064669 A CA 1064669A CA 267536 A CA267536 A CA 267536A CA 1064669 A CA1064669 A CA 1064669A
- Authority
- CA
- Canada
- Prior art keywords
- casting
- displacement
- carriage
- mold
- continuous casting
- 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.)
- Expired
Links
- 238000005266 casting Methods 0.000 title claims abstract description 92
- 238000009749 continuous casting Methods 0.000 title claims abstract description 29
- 229910000831 Steel Inorganic materials 0.000 title claims abstract description 9
- 239000010959 steel Substances 0.000 title claims abstract description 9
- 238000006073 displacement reaction Methods 0.000 claims abstract description 46
- 238000009434 installation Methods 0.000 claims abstract description 35
- 239000002184 metal Substances 0.000 claims abstract description 12
- 229910052751 metal Inorganic materials 0.000 claims abstract description 12
- 150000002739 metals Chemical class 0.000 claims abstract description 5
- 238000004519 manufacturing process Methods 0.000 claims description 5
- 238000010276 construction Methods 0.000 description 7
- 230000007704 transition Effects 0.000 description 7
- 230000002844 continuous effect Effects 0.000 description 5
- 230000008439 repair process Effects 0.000 description 4
- 230000004888 barrier function Effects 0.000 description 3
- 230000008901 benefit Effects 0.000 description 3
- 230000010355 oscillation Effects 0.000 description 3
- 239000000498 cooling water Substances 0.000 description 2
- 230000008878 coupling Effects 0.000 description 2
- 238000010168 coupling process Methods 0.000 description 2
- 238000005859 coupling reaction Methods 0.000 description 2
- 238000010079 rubber tapping Methods 0.000 description 2
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 description 2
- 241000582342 Carria Species 0.000 description 1
- 241000283014 Dama Species 0.000 description 1
- 241000534944 Thia Species 0.000 description 1
- 230000015572 biosynthetic process Effects 0.000 description 1
- 230000008859 change Effects 0.000 description 1
- 238000004140 cleaning Methods 0.000 description 1
- 238000001816 cooling Methods 0.000 description 1
- JNSGIVNNHKGGRU-JYRVWZFOSA-N diethoxyphosphinothioyl (2z)-2-(2-amino-1,3-thiazol-4-yl)-2-methoxyiminoacetate Chemical compound CCOP(=S)(OCC)OC(=O)C(=N/OC)\C1=CSC(N)=N1 JNSGIVNNHKGGRU-JYRVWZFOSA-N 0.000 description 1
- 230000002349 favourable effect Effects 0.000 description 1
- 239000007788 liquid Substances 0.000 description 1
- 230000007246 mechanism Effects 0.000 description 1
- 239000000155 melt Substances 0.000 description 1
- 239000007921 spray Substances 0.000 description 1
- 230000007723 transport mechanism Effects 0.000 description 1
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
- B22D11/08—Accessories for starting the casting procedure
- B22D11/085—Means for storing or introducing the starter bars in the moulds
-
- 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
- B22D11/14—Plants for continuous casting
- B22D11/142—Plants for continuous casting for curved casting
Landscapes
- Engineering & Computer Science (AREA)
- Mechanical Engineering (AREA)
- Continuous Casting (AREA)
- Casting Devices For Molds (AREA)
Abstract
ABSTRACT OF THE DISCLOSURE
A continuous casting installation for metals, especially steel, comprising a movable tundish, a subdivided, at least partially curved roller apron, a withdrawal and straightening machine, and a runout roller table. There are provided two displacement carriages which can be selectively brought into a casting position and a preparatory position. At each displacement carriage there is arranged at least one unit consisting of a mold and a first part of the roller apron following such mold. The unit momentarily located in its casting position cooperates with a stationary second part of the roller apron. Furthers there are provided casting platform covers arranged above the displacement path of such displacement carriages between the casting position and the preparatory positions. The casting platform covers are arranged independent of the displacement carriages and there are provided devices for infeeding a dummy bar which cooperates with the unit located in casting position.
A continuous casting installation for metals, especially steel, comprising a movable tundish, a subdivided, at least partially curved roller apron, a withdrawal and straightening machine, and a runout roller table. There are provided two displacement carriages which can be selectively brought into a casting position and a preparatory position. At each displacement carriage there is arranged at least one unit consisting of a mold and a first part of the roller apron following such mold. The unit momentarily located in its casting position cooperates with a stationary second part of the roller apron. Furthers there are provided casting platform covers arranged above the displacement path of such displacement carriages between the casting position and the preparatory positions. The casting platform covers are arranged independent of the displacement carriages and there are provided devices for infeeding a dummy bar which cooperates with the unit located in casting position.
Description
The present invention relates to a continuous casting installation for metals, especially steel.
A considerable difficulty in obtaining a high degree of utilization of a continuou~ casting installation is to provide efficient coordination between the tapping cycles of the steel production assembly and the casting cycle~ of the continuous casting installation. The casting cycles consist of the casting time and the tran3ition time between two pours.
During the transition time it is particularly nece~sary that the hot ~trand end be withdrawn, the dummy bar introduced into -- the roller apron or strand guide arrangement and ~ealed in the mold. ~hi~ tran~ition time disadvantageously influence~ the utili~ation factor or available casting time of the installation.
~he available ca~ting time is, however, also negatively affected by predictable interruptions, ~uch a~ changes in the section or 6hape of the strand and/ox quality changes and so forth, aq well as also by non-predictable interruptions, such as metal break-out and the like~ ~`
It is known to increa~e the utili~ation factor of a oo~tinuous casting installation by means of sequential pours, becau~e in this way the transition time from one pvur to the next only comes into play when casting metal into the first ladle. Sequential pour3 or sequence ca~ting is, howe~er, only ; pos~ible with an exact coordination of the tapping times of the , . .
~teel production assembly and the casting time~ at the continuou~ casting installation. It i8 never po~sible to completely a~oid disturbances which affect such coordination.
Also, sequence ca~ting is only usual with melts of the same stecl quality as well a~ unaltered strand ~ection or shape.
Interruption of sequence casting or sequential pours occurs upon dama~e to refractory parts of the installation, metal break-out or other disturbances. In the case of steel plants ,;
where the production conslderably varies narrow limits are thus placed upon sequence casting and therefore the utilization of the continuous casting in~tallation.
There is known to the art a continuous Gasting installation, whose at least partially curved roller apron is subdivided, and at two displacement carriages there is arranged at least one respective unit or assembly con~isting of a mold a~d a first roller apron portion merging therewith. ;
;~ The displacement carriages can be alternately brought into a casting position and a preparatory position. ~he unit which is momentarily located in the casting position cooperates with the stationary second part of the roller apron. Connected with the ~ -displacement caxriages are casting platform covers which cover the di~placement path of such di3placement carriages betwsen the castlng position and the preparatory positions. With this continuous casting installation the dummy bar is introduced by means of an infeed device in one of both preparatory positions into the unit~ The roller apron part of the unit is provided for thia purpose with a holding - and tra~port mechanism for the dummy bar. Each of both displacement carriages i9 therefore ,. ~
equipped with an electrical or hydraulic drive and with infeed llnes leading to appropriate supply netwQrks. ~he existence of such flexible infeed lines complicates the continuous casting installation and, furthermore, renders such also expensive due to the need to equip each uni+, with such drives. Furthermore, the transport mechanism between the uncouplin~ location and ~`~
the infeed locations for the dummy bar located in the preparatory po~itions is expenaive. A further drawback of this construction resides in the fact that repairs in the pxeparatory position, ; ?
laating longer than the casting time of the pour which i9 taking place, result in an i~crease in the transition time because the dummy bar cannot be introduced during the repair :~q~
time. In these instances, it i9 thus not possible to obtain optimum tran~ition times. Due to the co~nection of the casting platform covers with the displacement carriages, the casting platform cover is shifted away for a certain period of time during each transition time7 producing open pits or the like.
Such temporarily formed pit~ increa~e the danger of accidents occurring at the casting platform, and therefore~ it is necessary to erect pit barriers or the like. These barriers, in turn, however reduce the useful area of the casting or teeming platform and disturb the casting operation.
It is therefore a general object of the present invention to provide a new and improved construc~ion of a - continuou~ casting i~stallation which is not as~ociated with the aforementioned drawba¢ks and limitations o~ the prior art constructions.
Another and more specific object of the present invention aims at eliminating the a~orementioned drawbacks and providing a continuous casting installation having increased utilization factor with frequent change in the strand ~ection - 20 or shape and in the presence of disturbances, a~d ~urthermore, improving the configuration of the casting or teeming platform and reducing the danger of accidents.
Still a further significant object of the pre~ent invention aims at simplifying the return o~ the dummy bar to the ~ ;
roller apron or strand guide arrangement and into the mold as well as simplifying the total construction of the continuous casting installation and its operation.
Now in order to implernent these and still further object~ of the invention, which will becorne more readily apparent 30 as the description proceeds, the invention provides a continuous casting installation ~or metals, especlally steel, which i9 generally of the type comprising a movable tundish, a subdivided, ; - -3~ ~;
~: :
, j , i at least partially curved roller apron, a withdrawal and ~traightening machine, and a runout roller table. '~here are pro~ided two displacement carriages which c~n be selectively brought into a casting position and a preparatory position.
At each displacement carriage there is arranged at least one unit or assembly con~isting of a mold and a first part of the roller apron following such mold. The unit momentarily located in tis casting poqition cooperate~ with a stationary second part of the roller apron. Further, there are provided casting platform covers or cover members arranged above the displacement -~
path of such displacement carriages between the casting position and the preparatory positions. According to the -; invention, the casting platform covers are arranged independent of the displacement carriages and there are provided devices or ~-means for infeeding a dummy bar which cooperate with the unit located in the ca3ting position~
With such continuous ca~ting installation, it is possi~
ble to obtain transition times in the order of twenty minutes and less when changing the strand section or shape between successive - -pours. But also in the case of di~turbances, such as in parti~
:, .
cular metal brea~ outs, there ca~ be realized short tran~ition times by ex~hanging the units by means of the displacement carriage~. In addition to these advantages, the displacement carriages and the units or as~emblies located thereat are extremely ~imple in construction and they neither po~ses~ drive elements nor energy infeed line~ as~ociated therewith. In the case of multi-strand installations the units associated with 0ach strand can be constructed at both of the displacement carriage~
~o as to have minimum strand 3pacing. There thus result3 a compact construction possessing ~hort flow paths for the liquid steel between the ladle and the mold and also small tundi~he~.
Moreover, there can be carried out in one of the preparatory , positions comprehensive repairs during repair times amounting to a number of succe~qsive pouring or ca~ting cycles, such a~
cleaning of the roller apron after a break-out, without increasing ~he transition time, because there is no disturbance of the infeed of the dummy bar to the unit located in the casting position. Due to the inventive construction of the casting platform covers, there does not exist during the travel time any relative movement between the di~placement carriages and the casting or teeming platform. ~here is avoided the temporary formation of pits at the casting platform between the casting and preparatory positions as well as barriers or the like around ~uch pits. Dhe u~eful surface of the casting platform is therefore increased and detrime~tal hindering of the castin~
operation i9 also precluded. A further advantage i~ additionally realized by virtue of the fact that shifting of the displacement carriages is only neces~ary when changing the shape or section of the cast strand and in the preaence of disturbances. ;~
It is especially advantageoua if the casting platform cover is constructed as a tunnel which, in contrast to the casting platform, form~ a casting platform floor arranged at a greater elevation. With thi~ ~olution the casting platform co~er remains stationary even during travel of the displacement ~;
carriages. It i~ also readily possible to utilize the casting platform floor arranged at the greater elevation for handling or worki~g on the tundish or a~ a deposit sur~ace.
I~ for certain reasona a ca~ting platform floor ~- ;
arranged at a greater elevation ~hould be di3advantageous, then it i3 poa~ible according to a further a~pect o~ the invention, to arrange the casting platform cover to be pivotable in order to provide the neces~ary travel clearance for the displacement carriage. It is readily pos~ible to conatruct the pivotable ca~ting platform covers such that ., ,, ,~ .
~ ~6~
they do not form at any location of the ca~ting or teeming pla~form openlngs which could con~titute the source of an accident.
In order to reduce the tranqition time between -~equential pours, it i~ advantageous, according to a further facet of the invention, if the first roller pair, viewed in the direction of travel of the strand, of the stationary roller apron part pos~e~eq at lea~t one driving roller and directly thereafter there is provided an infeed location for a short dum~y bar, and if there are arranged after the withdrawal and straightening machine or unit an uncoupling location for the dummy bar and between the uncoupling location and the infeed location devices or mean~ ~or the infeed of the dummy bar. ~he transition time, with ~uch type co~tinuous casting in~tallation~ ~
- can b~ reduced by at lea~t an additional five minutes. The ~-device~ or ~eans for the infeed of the dummy bar advantageously comprise a crane cooperating with a curved roller guide and an infeed table arranged upon an intermediate platform.
It is po~sible to obtain a particularly favorable geometry of the equipment between the mold and the first roller apron part~ if the displacement carriages are con~tructed a~
semi-gantry or ~emi-portal carriage~ a~d es~entially con~ist ; of a vertical support or carrier at which there are secured the o~cillating mold and the roller apron part.
In order to en~ure for a faultle~s alignment between ~ ;
the roller apron part located at the associated di~placement j ~, , carria~e and the stationary ~econd part o~ the roller apron, it i~ adva~tageou~ if the di3placement carriages, when in their ca~ting position, are shifted by power devices against adjustment stop~ provided at the frame of the continuous ca~ting installation.
In order to ensure that the introduction of the dummy , . . . .
bar into the unit occurs before -the cast ~trand has departed from the driving arrangement, it i5 possible according to a further feature of the invention, to driv~ the driving roller~
a~sociated with the infeed location for the dummy bar and the rollers of the withdrawal and ~traightening machine both synchronou31y a~ well a3 also independently of one another.
me invention will be better understood and objects other than those set forth above, will become apparent when consideration is given to the following detailed description thereof. Such description makes reference to the annexed drawinga wherein~
Figure 1 is a ~chem~tic vertical ~ection~l view through a continuou~ ca~ting in~tallation constructed according to the teachings of the present invention;
~ igure 2 i~ a top plan view of the continuous casting ::
in~tallation shown in Figure l; and ~igure 3 is a fragmsntary ~ertical sectional view through another embodiment of the invention. ;
` Describing now the drawing~, it is to be understood that only enough of the co~tinuous casting installation has bee~ shown in order to enable those qkilled in the art to ~; readil~ under~tand the underlying principles and concepts of the present invention. Further, it is to be appreciated that ~i there ha~ been illu3trated by way of example a twin-~trand casting machine or installation, although the principles of ths invention are equally applicable to other ca3ting installations, ~uch a~ a ~ingle strand casting machine. It will be seen in particular by referring to Figure~ 1 and 2 that a movable tundi3h , 2 i8 arranged above the two mo~d~ 1, 1'. Since the construction of the casting installation i~ ba~ically the same for each strand9 it will suf~ice to generally consider the component~
- a~ociated with one of the ~trand~. ~hus, it will be recognized ' ~9~ a-~
that following the mold 1 there i~ a roller apron or strand . .
guide arrangement 3, a withdrawal and ~traightening machine or unit 4, and a runout roller table 5. ~he roller apron 3 is provided with the usual secondary cooling devices, such as the schematically illustrated spray nozzles 40. Between the mold 1 and the withdrawal and ~traightening ~achi~e 4, there are arran~ed additional paix~ of driving rollers 8 and 9 which are driven by the ~chematically illu~trated drive motor~ 8a, 9a respectively. ~he driving roller pair 8 located closest to the mold 1 has directly following thereat an infeed location 10 for a ~hort dummy bar 11. After the withdrawl and straightening machine 4 there is arranged an uncoupling location, generally indicated by the arrow 12 for the dummy bar 11. Between the uncoupling location 12 and the infeed location 10 there are provided the hereinafter discussed transport devices or ?
tran~port means for infeeding the dummy bar 11 into the unit ... 20 located in the casting position, which unit 20 compri~es the :
:; roller section 21 a~d the associated mold 1. ~he transport device3 may comprise, by way of example, a crane 14 or equivalent 3tructure arranged above the runout roller table 5, which lifts the dummy bar 11 from the runout roller table 5 and thereby ~imultaneou~ly uncoupleq the dummy bar 11 from the ca~ strand 15.
; .
By means of a curved roller guide 16, also constituting part of the transport means, pivotable about the shaft 13 it is possible for the dummy bar 11 to be deposited upon an infeed table 17, equally constituting part of the transport means, and arranged above the withdrawal and straightening machine 4, as such ha~ been shown in phantom lines in Figure 1. This infeed table 17 can be displaced upon an intermediate platform 7 towards the infeed location 10 and by means of a drive 19 the dummy bar 11 can be shifted from the infeed table 17 into the . operable region of the driving roller~ or rolls 8. ~-~ . ~
: . -8- : :
.~ ~
",: ; ~ , ~.... . .
. ~ . . .
Above the driving rollers 8 which are secured at the machine frame and associated with th~ infeed location 10 there are movable, tran~versely with respect to the direction of travel of the strand 15, two di~placement carriages 22, 22' or equivalent s-tructure. The displacement carriage 22 is shown in the casting position 23 in Figure 1, and the displacement carriage 22' is shown in the preparatory position 24 in Figure 2. As mentioned previously, the exemplary embodiment of continuous casting installation depicted in Figures 1 and 2 serves to ca~t two strands. ~herefore, at each of the two displacement carriages 22S 22' there are mounted a respective unit 20 consi~ting of a respective mold, 3uch as the mold 1, and its following first roller apron part or portion, such as the roller apron part 21. ~he displacement carriages, 22, 22' can be alternately brought into the casting position 23 and into one of the preparatory positions 24, 24'. The unit or assembly 20 located in the casting position 23 cooperates with the stationary second part o~ the roller apron or strand guide arrangement 3.
This stationary second part of the roller apron 3 starts at the pair of driving roller~ 8 and ends at -the uncoupling location 12.
Between the casting position 2~ and the preparatory positions 24 and 24' respectively, the casting or teeming platform 6 is provided with casting platform covers or cover members 18 which are arranged independently of the displacement carriages 22, 22'. Each such casting platform 18 is constructed a~ a tu~nel and provide~, in relation to the casting platform 6, a castin~ platform floor arranged at a greater elevation. ~ach such casting platform cover 18 is fixedly connected in any convenient manner, such as by botts or other fa~tening mean~, with the ca~ting platform 6.
The displacement carriage 3 22, 22' are constructed as semi-gantry carriages and each essentially comprise a vertical _g_ support or carrier 25. ~he di~placeme~t carriage~ 22, 22' are e~sentially linearly displaceable along the railB 26, 26', 26 ", and the displace~ent carriage 22' can be ~hifted in each in~tance between the preparatory position 24 and the casting po~ition 23, whereas the d.isplacement carriage 22 can be shifted bet~Jeen the casting position 23 and the preparatory : position 24', ~t the vertical support 25 there are attached the associated oscillating molds 1, 1' as well as also the ~:
roller apron parts 21, 21'. A schematically illustrated ~: :
oscillation drive 27, which i~ connected at the casting position 23 with the foundation, can be coupled and uncoupled with an :
oacillation lever 29 by means of a piston and cylinder unit 28.
In order to fixedly clamp and simultaneouæly adjust the displacement carriage 22 located in the casting position 23, this di~placement carriage 22 is shifted by mean~ of a power ~-~
; device 30 against adjustment stops 31 provided at the machine ~:
frame, generally indicated b~ reference character 50. ~he ,~
roller apron part 21 is thus aligned with the driving rolls 8 ~`
located therebelow, ,~ :
~he roller~ 32 of the withdrawal and straightening ~ .
t `:'~
machine 4 are provided with the schematically illustrated roller drives 32a. ~he driving roller~ 8 as~ocaited with the `.
infeed location 10 for the dwnmy bar 11 and the rollers 32 of the withdrawal and ~traightening machine 4 are driven ,.
synchron.ou~ly and independently of one another with the aid of a suitable drive control, as schematically indicated by reference character 550 This enables outfeeding a cast strand 15 located below the driving roller~ 8 and at the 6ame time introducing the dummy bar 11 into the unit 20 by means of the aforementioned ;
30 driving rollers 8, If after the start of casting the dummy bar 11 .~ ~:
leaves the driving rollers 8, then the contact force o~ the ;~
driving rollers 8 and 9 is appreciably reduced to ~uch an extent ,i, --10--. ~ ,. . , . ........... : : ..
. ,, ~ ,. . .
... . . . . . . .
. . . . . . . ' , ' , 1 ~ @
that the cast ~trand 15 will not become damaged by such rollers.
In Figure 2 there is 3hown in phantom lines the tundi~h 2 in casting po~itlon and the tundi3h 2' which ha3 been rocked about a vertical shaft 35 i~ shown located at a preheating ~tation. When using such pivotable or displaceable tundishe~, it is possible to maintain small the spacing between the preparatory po~itions 24, 24'.
Now in Figure 3 there is illustrated a varian-t arrangement wherein a castlng platform cover or cover member 37 is pivotable about a hinge or pivot shaft 38 for the purpose of providing the requisite travel clearance for the displacement carriages 22, 22~. A support wall 39 ensures that during ~he entire time that the carriages 22, 22' are displaced, there is not present any pit-like opening in the casting platform between the casting position 23 and the preparatory positions 24, 24', thereby eliminating the danger of acciclents.
Having nwo had the benefit of the foregoing -~
description, the operation of the continuous casting machine or installation shown in Figures 1 and 2 will be considered and i9 as follows:
By way of example, there will be de~cribed two succe3sive pours for di~ferent ~trand ~ections or shapes. During the time that one of the pours is still being completed, the mold~ 1, 1' of the di~placement carriage 22', which is in the preparatory po~ition 24, i~ adjusted to the new ~trand section : . .
which is required for the next pour or casting. After the departure of the ca~t strand 15 of the exi~ting pour from the mold~ 1, 1' which are in the casting position 23, it i9 ~ .
po~sible to di~connect by means of the piston and cylinder unit 28 the oscillation dri~e 27 ~rom the 03cillation lever 29 secured to the di~placement carriage 22. Once the strand 15 has departed from the roller apron part or section 21, then - . :
.
.
.
a not particularly illustrated bll-t conventional water coupling plate, which i~ connec-ted with ths carriage 22 and contains all of the connection~ for the mold cooling water and the ~econdary cooling water, i8 disconnected from the coupling plate fixedly arranged at the machine frame. By means of the power de~ice 30 there is released the adjust~ent of the ~ ;
carriage 22. After t.his preparatory work, the carriage 22 i8 shifted by its drive, such as the drive 60 illustrated in figure 2 for the carriage 22', along the rails 26 into the preparatory position 24'. Pr.actically at the same time the ~: carriage 22' i9 brought into the casting position 23, adjusted, the water connection plate coupled and the oscilla-tion drive :
27 connected with the lever 29. ~he infeed table 17 which can .
~ be shifted towards the driving rollers 8, displaces by means . :'~
of the drive 19 the dummy bar 11 which was brought a~ter the :~ start of ca~ting onto the infeed table, between the driving ~ :~
rollers 8. These driving rollers 8 then convey the dummy bar 11 :~;
into the unit 20. The dummy bar head is sealed in conventional manner at the mold and there can now be started the next pour or casting operation ~or the new strand shape or section. The .
- ;.:::
above-enumerated operations are carried out during such time as the existing pour or teemed metal is being discharged from the .
. tundish. The required tran~ition time, even in the ca~e of multi-strand casting in~tallations, is in the order of about 15 ~ :
.: minutes between the closure of the tundish for the old pour and ...
opening of the tundish for the new pour. ~:~
A~ter a break-out the exchange of the displacement.
; carriage~ 22, 22' is carried out in the same manner, and a~
a general rule the ~-trand 15 i~ severed between the driving roller~ 8 ~nd the roller apron part 21.
- ~he continuou~ casting in~tallation of the invention ~ ~
is not li~ited to curvilinear or arc-type roller apron~ a~ -.
.
, ,. ' , . ': . :
i~3~
shown in Figures 1 and 2. The principles of the invention al~o can be applied to continuous casting installation~ working with straight moldæ and partially straight roller apron~. With such an installation the dummy bar can be, for instanoe, introduced from the underside of the roller apron advantageously at the tran~ition between the straigllt roller apron portion and the curved roller apron portion.
In the ca~e of slab casting installations, the infeed location 10 can be provided with displaceable rollers for opening and cloqing ~uch infeed loeation. Moreover, the return of the du~my bar i9 not limited to the po~ibilities shown by way of example in Figures 1 and 2. It can be advantageous to use a long dummy bar which is introduced for instance through the withdrawal and ~traightening machine, or to in-troduce the dummy bar through the mold according to conventional solutions.
While there are shown and described present prefer~ed embodiments of the invention, it is to be di~tinctly understood -that the invention is not limited thereto, but may be otherwise variou~ly embodied and practiced withi~ the ~cope of the ~o lowing claims.
., : , , , - ,
A considerable difficulty in obtaining a high degree of utilization of a continuou~ casting installation is to provide efficient coordination between the tapping cycles of the steel production assembly and the casting cycle~ of the continuous casting installation. The casting cycles consist of the casting time and the tran3ition time between two pours.
During the transition time it is particularly nece~sary that the hot ~trand end be withdrawn, the dummy bar introduced into -- the roller apron or strand guide arrangement and ~ealed in the mold. ~hi~ tran~ition time disadvantageously influence~ the utili~ation factor or available casting time of the installation.
~he available ca~ting time is, however, also negatively affected by predictable interruptions, ~uch a~ changes in the section or 6hape of the strand and/ox quality changes and so forth, aq well as also by non-predictable interruptions, such as metal break-out and the like~ ~`
It is known to increa~e the utili~ation factor of a oo~tinuous casting installation by means of sequential pours, becau~e in this way the transition time from one pvur to the next only comes into play when casting metal into the first ladle. Sequential pour3 or sequence ca~ting is, howe~er, only ; pos~ible with an exact coordination of the tapping times of the , . .
~teel production assembly and the casting time~ at the continuou~ casting installation. It i8 never po~sible to completely a~oid disturbances which affect such coordination.
Also, sequence ca~ting is only usual with melts of the same stecl quality as well a~ unaltered strand ~ection or shape.
Interruption of sequence casting or sequential pours occurs upon dama~e to refractory parts of the installation, metal break-out or other disturbances. In the case of steel plants ,;
where the production conslderably varies narrow limits are thus placed upon sequence casting and therefore the utilization of the continuous casting in~tallation.
There is known to the art a continuous Gasting installation, whose at least partially curved roller apron is subdivided, and at two displacement carriages there is arranged at least one respective unit or assembly con~isting of a mold a~d a first roller apron portion merging therewith. ;
;~ The displacement carriages can be alternately brought into a casting position and a preparatory position. ~he unit which is momentarily located in the casting position cooperates with the stationary second part of the roller apron. Connected with the ~ -displacement caxriages are casting platform covers which cover the di~placement path of such di3placement carriages betwsen the castlng position and the preparatory positions. With this continuous casting installation the dummy bar is introduced by means of an infeed device in one of both preparatory positions into the unit~ The roller apron part of the unit is provided for thia purpose with a holding - and tra~port mechanism for the dummy bar. Each of both displacement carriages i9 therefore ,. ~
equipped with an electrical or hydraulic drive and with infeed llnes leading to appropriate supply netwQrks. ~he existence of such flexible infeed lines complicates the continuous casting installation and, furthermore, renders such also expensive due to the need to equip each uni+, with such drives. Furthermore, the transport mechanism between the uncouplin~ location and ~`~
the infeed locations for the dummy bar located in the preparatory po~itions is expenaive. A further drawback of this construction resides in the fact that repairs in the pxeparatory position, ; ?
laating longer than the casting time of the pour which i9 taking place, result in an i~crease in the transition time because the dummy bar cannot be introduced during the repair :~q~
time. In these instances, it i9 thus not possible to obtain optimum tran~ition times. Due to the co~nection of the casting platform covers with the displacement carriages, the casting platform cover is shifted away for a certain period of time during each transition time7 producing open pits or the like.
Such temporarily formed pit~ increa~e the danger of accidents occurring at the casting platform, and therefore~ it is necessary to erect pit barriers or the like. These barriers, in turn, however reduce the useful area of the casting or teeming platform and disturb the casting operation.
It is therefore a general object of the present invention to provide a new and improved construc~ion of a - continuou~ casting i~stallation which is not as~ociated with the aforementioned drawba¢ks and limitations o~ the prior art constructions.
Another and more specific object of the present invention aims at eliminating the a~orementioned drawbacks and providing a continuous casting installation having increased utilization factor with frequent change in the strand ~ection - 20 or shape and in the presence of disturbances, a~d ~urthermore, improving the configuration of the casting or teeming platform and reducing the danger of accidents.
Still a further significant object of the pre~ent invention aims at simplifying the return o~ the dummy bar to the ~ ;
roller apron or strand guide arrangement and into the mold as well as simplifying the total construction of the continuous casting installation and its operation.
Now in order to implernent these and still further object~ of the invention, which will becorne more readily apparent 30 as the description proceeds, the invention provides a continuous casting installation ~or metals, especlally steel, which i9 generally of the type comprising a movable tundish, a subdivided, ; - -3~ ~;
~: :
, j , i at least partially curved roller apron, a withdrawal and ~traightening machine, and a runout roller table. '~here are pro~ided two displacement carriages which c~n be selectively brought into a casting position and a preparatory position.
At each displacement carriage there is arranged at least one unit or assembly con~isting of a mold and a first part of the roller apron following such mold. The unit momentarily located in tis casting poqition cooperate~ with a stationary second part of the roller apron. Further, there are provided casting platform covers or cover members arranged above the displacement -~
path of such displacement carriages between the casting position and the preparatory positions. According to the -; invention, the casting platform covers are arranged independent of the displacement carriages and there are provided devices or ~-means for infeeding a dummy bar which cooperate with the unit located in the ca3ting position~
With such continuous ca~ting installation, it is possi~
ble to obtain transition times in the order of twenty minutes and less when changing the strand section or shape between successive - -pours. But also in the case of di~turbances, such as in parti~
:, .
cular metal brea~ outs, there ca~ be realized short tran~ition times by ex~hanging the units by means of the displacement carriage~. In addition to these advantages, the displacement carriages and the units or as~emblies located thereat are extremely ~imple in construction and they neither po~ses~ drive elements nor energy infeed line~ as~ociated therewith. In the case of multi-strand installations the units associated with 0ach strand can be constructed at both of the displacement carriage~
~o as to have minimum strand 3pacing. There thus result3 a compact construction possessing ~hort flow paths for the liquid steel between the ladle and the mold and also small tundi~he~.
Moreover, there can be carried out in one of the preparatory , positions comprehensive repairs during repair times amounting to a number of succe~qsive pouring or ca~ting cycles, such a~
cleaning of the roller apron after a break-out, without increasing ~he transition time, because there is no disturbance of the infeed of the dummy bar to the unit located in the casting position. Due to the inventive construction of the casting platform covers, there does not exist during the travel time any relative movement between the di~placement carriages and the casting or teeming platform. ~here is avoided the temporary formation of pits at the casting platform between the casting and preparatory positions as well as barriers or the like around ~uch pits. Dhe u~eful surface of the casting platform is therefore increased and detrime~tal hindering of the castin~
operation i9 also precluded. A further advantage i~ additionally realized by virtue of the fact that shifting of the displacement carriages is only neces~ary when changing the shape or section of the cast strand and in the preaence of disturbances. ;~
It is especially advantageoua if the casting platform cover is constructed as a tunnel which, in contrast to the casting platform, form~ a casting platform floor arranged at a greater elevation. With thi~ ~olution the casting platform co~er remains stationary even during travel of the displacement ~;
carriages. It i~ also readily possible to utilize the casting platform floor arranged at the greater elevation for handling or worki~g on the tundish or a~ a deposit sur~ace.
I~ for certain reasona a ca~ting platform floor ~- ;
arranged at a greater elevation ~hould be di3advantageous, then it i3 poa~ible according to a further a~pect o~ the invention, to arrange the casting platform cover to be pivotable in order to provide the neces~ary travel clearance for the displacement carriage. It is readily pos~ible to conatruct the pivotable ca~ting platform covers such that ., ,, ,~ .
~ ~6~
they do not form at any location of the ca~ting or teeming pla~form openlngs which could con~titute the source of an accident.
In order to reduce the tranqition time between -~equential pours, it i~ advantageous, according to a further facet of the invention, if the first roller pair, viewed in the direction of travel of the strand, of the stationary roller apron part pos~e~eq at lea~t one driving roller and directly thereafter there is provided an infeed location for a short dum~y bar, and if there are arranged after the withdrawal and straightening machine or unit an uncoupling location for the dummy bar and between the uncoupling location and the infeed location devices or mean~ ~or the infeed of the dummy bar. ~he transition time, with ~uch type co~tinuous casting in~tallation~ ~
- can b~ reduced by at lea~t an additional five minutes. The ~-device~ or ~eans for the infeed of the dummy bar advantageously comprise a crane cooperating with a curved roller guide and an infeed table arranged upon an intermediate platform.
It is po~sible to obtain a particularly favorable geometry of the equipment between the mold and the first roller apron part~ if the displacement carriages are con~tructed a~
semi-gantry or ~emi-portal carriage~ a~d es~entially con~ist ; of a vertical support or carrier at which there are secured the o~cillating mold and the roller apron part.
In order to en~ure for a faultle~s alignment between ~ ;
the roller apron part located at the associated di~placement j ~, , carria~e and the stationary ~econd part o~ the roller apron, it i~ adva~tageou~ if the di3placement carriages, when in their ca~ting position, are shifted by power devices against adjustment stop~ provided at the frame of the continuous ca~ting installation.
In order to ensure that the introduction of the dummy , . . . .
bar into the unit occurs before -the cast ~trand has departed from the driving arrangement, it i5 possible according to a further feature of the invention, to driv~ the driving roller~
a~sociated with the infeed location for the dummy bar and the rollers of the withdrawal and ~traightening machine both synchronou31y a~ well a3 also independently of one another.
me invention will be better understood and objects other than those set forth above, will become apparent when consideration is given to the following detailed description thereof. Such description makes reference to the annexed drawinga wherein~
Figure 1 is a ~chem~tic vertical ~ection~l view through a continuou~ ca~ting in~tallation constructed according to the teachings of the present invention;
~ igure 2 i~ a top plan view of the continuous casting ::
in~tallation shown in Figure l; and ~igure 3 is a fragmsntary ~ertical sectional view through another embodiment of the invention. ;
` Describing now the drawing~, it is to be understood that only enough of the co~tinuous casting installation has bee~ shown in order to enable those qkilled in the art to ~; readil~ under~tand the underlying principles and concepts of the present invention. Further, it is to be appreciated that ~i there ha~ been illu3trated by way of example a twin-~trand casting machine or installation, although the principles of ths invention are equally applicable to other ca3ting installations, ~uch a~ a ~ingle strand casting machine. It will be seen in particular by referring to Figure~ 1 and 2 that a movable tundi3h , 2 i8 arranged above the two mo~d~ 1, 1'. Since the construction of the casting installation i~ ba~ically the same for each strand9 it will suf~ice to generally consider the component~
- a~ociated with one of the ~trand~. ~hus, it will be recognized ' ~9~ a-~
that following the mold 1 there i~ a roller apron or strand . .
guide arrangement 3, a withdrawal and ~traightening machine or unit 4, and a runout roller table 5. ~he roller apron 3 is provided with the usual secondary cooling devices, such as the schematically illustrated spray nozzles 40. Between the mold 1 and the withdrawal and ~traightening ~achi~e 4, there are arran~ed additional paix~ of driving rollers 8 and 9 which are driven by the ~chematically illu~trated drive motor~ 8a, 9a respectively. ~he driving roller pair 8 located closest to the mold 1 has directly following thereat an infeed location 10 for a ~hort dummy bar 11. After the withdrawl and straightening machine 4 there is arranged an uncoupling location, generally indicated by the arrow 12 for the dummy bar 11. Between the uncoupling location 12 and the infeed location 10 there are provided the hereinafter discussed transport devices or ?
tran~port means for infeeding the dummy bar 11 into the unit ... 20 located in the casting position, which unit 20 compri~es the :
:; roller section 21 a~d the associated mold 1. ~he transport device3 may comprise, by way of example, a crane 14 or equivalent 3tructure arranged above the runout roller table 5, which lifts the dummy bar 11 from the runout roller table 5 and thereby ~imultaneou~ly uncoupleq the dummy bar 11 from the ca~ strand 15.
; .
By means of a curved roller guide 16, also constituting part of the transport means, pivotable about the shaft 13 it is possible for the dummy bar 11 to be deposited upon an infeed table 17, equally constituting part of the transport means, and arranged above the withdrawal and straightening machine 4, as such ha~ been shown in phantom lines in Figure 1. This infeed table 17 can be displaced upon an intermediate platform 7 towards the infeed location 10 and by means of a drive 19 the dummy bar 11 can be shifted from the infeed table 17 into the . operable region of the driving roller~ or rolls 8. ~-~ . ~
: . -8- : :
.~ ~
",: ; ~ , ~.... . .
. ~ . . .
Above the driving rollers 8 which are secured at the machine frame and associated with th~ infeed location 10 there are movable, tran~versely with respect to the direction of travel of the strand 15, two di~placement carriages 22, 22' or equivalent s-tructure. The displacement carriage 22 is shown in the casting position 23 in Figure 1, and the displacement carriage 22' is shown in the preparatory position 24 in Figure 2. As mentioned previously, the exemplary embodiment of continuous casting installation depicted in Figures 1 and 2 serves to ca~t two strands. ~herefore, at each of the two displacement carriages 22S 22' there are mounted a respective unit 20 consi~ting of a respective mold, 3uch as the mold 1, and its following first roller apron part or portion, such as the roller apron part 21. ~he displacement carriages, 22, 22' can be alternately brought into the casting position 23 and into one of the preparatory positions 24, 24'. The unit or assembly 20 located in the casting position 23 cooperates with the stationary second part o~ the roller apron or strand guide arrangement 3.
This stationary second part of the roller apron 3 starts at the pair of driving roller~ 8 and ends at -the uncoupling location 12.
Between the casting position 2~ and the preparatory positions 24 and 24' respectively, the casting or teeming platform 6 is provided with casting platform covers or cover members 18 which are arranged independently of the displacement carriages 22, 22'. Each such casting platform 18 is constructed a~ a tu~nel and provide~, in relation to the casting platform 6, a castin~ platform floor arranged at a greater elevation. ~ach such casting platform cover 18 is fixedly connected in any convenient manner, such as by botts or other fa~tening mean~, with the ca~ting platform 6.
The displacement carriage 3 22, 22' are constructed as semi-gantry carriages and each essentially comprise a vertical _g_ support or carrier 25. ~he di~placeme~t carriage~ 22, 22' are e~sentially linearly displaceable along the railB 26, 26', 26 ", and the displace~ent carriage 22' can be ~hifted in each in~tance between the preparatory position 24 and the casting po~ition 23, whereas the d.isplacement carriage 22 can be shifted bet~Jeen the casting position 23 and the preparatory : position 24', ~t the vertical support 25 there are attached the associated oscillating molds 1, 1' as well as also the ~:
roller apron parts 21, 21'. A schematically illustrated ~: :
oscillation drive 27, which i~ connected at the casting position 23 with the foundation, can be coupled and uncoupled with an :
oacillation lever 29 by means of a piston and cylinder unit 28.
In order to fixedly clamp and simultaneouæly adjust the displacement carriage 22 located in the casting position 23, this di~placement carriage 22 is shifted by mean~ of a power ~-~
; device 30 against adjustment stops 31 provided at the machine ~:
frame, generally indicated b~ reference character 50. ~he ,~
roller apron part 21 is thus aligned with the driving rolls 8 ~`
located therebelow, ,~ :
~he roller~ 32 of the withdrawal and straightening ~ .
t `:'~
machine 4 are provided with the schematically illustrated roller drives 32a. ~he driving roller~ 8 as~ocaited with the `.
infeed location 10 for the dwnmy bar 11 and the rollers 32 of the withdrawal and ~traightening machine 4 are driven ,.
synchron.ou~ly and independently of one another with the aid of a suitable drive control, as schematically indicated by reference character 550 This enables outfeeding a cast strand 15 located below the driving roller~ 8 and at the 6ame time introducing the dummy bar 11 into the unit 20 by means of the aforementioned ;
30 driving rollers 8, If after the start of casting the dummy bar 11 .~ ~:
leaves the driving rollers 8, then the contact force o~ the ;~
driving rollers 8 and 9 is appreciably reduced to ~uch an extent ,i, --10--. ~ ,. . , . ........... : : ..
. ,, ~ ,. . .
... . . . . . . .
. . . . . . . ' , ' , 1 ~ @
that the cast ~trand 15 will not become damaged by such rollers.
In Figure 2 there is 3hown in phantom lines the tundi~h 2 in casting po~itlon and the tundi3h 2' which ha3 been rocked about a vertical shaft 35 i~ shown located at a preheating ~tation. When using such pivotable or displaceable tundishe~, it is possible to maintain small the spacing between the preparatory po~itions 24, 24'.
Now in Figure 3 there is illustrated a varian-t arrangement wherein a castlng platform cover or cover member 37 is pivotable about a hinge or pivot shaft 38 for the purpose of providing the requisite travel clearance for the displacement carriages 22, 22~. A support wall 39 ensures that during ~he entire time that the carriages 22, 22' are displaced, there is not present any pit-like opening in the casting platform between the casting position 23 and the preparatory positions 24, 24', thereby eliminating the danger of acciclents.
Having nwo had the benefit of the foregoing -~
description, the operation of the continuous casting machine or installation shown in Figures 1 and 2 will be considered and i9 as follows:
By way of example, there will be de~cribed two succe3sive pours for di~ferent ~trand ~ections or shapes. During the time that one of the pours is still being completed, the mold~ 1, 1' of the di~placement carriage 22', which is in the preparatory po~ition 24, i~ adjusted to the new ~trand section : . .
which is required for the next pour or casting. After the departure of the ca~t strand 15 of the exi~ting pour from the mold~ 1, 1' which are in the casting position 23, it i9 ~ .
po~sible to di~connect by means of the piston and cylinder unit 28 the oscillation dri~e 27 ~rom the 03cillation lever 29 secured to the di~placement carriage 22. Once the strand 15 has departed from the roller apron part or section 21, then - . :
.
.
.
a not particularly illustrated bll-t conventional water coupling plate, which i~ connec-ted with ths carriage 22 and contains all of the connection~ for the mold cooling water and the ~econdary cooling water, i8 disconnected from the coupling plate fixedly arranged at the machine frame. By means of the power de~ice 30 there is released the adjust~ent of the ~ ;
carriage 22. After t.his preparatory work, the carriage 22 i8 shifted by its drive, such as the drive 60 illustrated in figure 2 for the carriage 22', along the rails 26 into the preparatory position 24'. Pr.actically at the same time the ~: carriage 22' i9 brought into the casting position 23, adjusted, the water connection plate coupled and the oscilla-tion drive :
27 connected with the lever 29. ~he infeed table 17 which can .
~ be shifted towards the driving rollers 8, displaces by means . :'~
of the drive 19 the dummy bar 11 which was brought a~ter the :~ start of ca~ting onto the infeed table, between the driving ~ :~
rollers 8. These driving rollers 8 then convey the dummy bar 11 :~;
into the unit 20. The dummy bar head is sealed in conventional manner at the mold and there can now be started the next pour or casting operation ~or the new strand shape or section. The .
- ;.:::
above-enumerated operations are carried out during such time as the existing pour or teemed metal is being discharged from the .
. tundish. The required tran~ition time, even in the ca~e of multi-strand casting in~tallations, is in the order of about 15 ~ :
.: minutes between the closure of the tundish for the old pour and ...
opening of the tundish for the new pour. ~:~
A~ter a break-out the exchange of the displacement.
; carriage~ 22, 22' is carried out in the same manner, and a~
a general rule the ~-trand 15 i~ severed between the driving roller~ 8 ~nd the roller apron part 21.
- ~he continuou~ casting in~tallation of the invention ~ ~
is not li~ited to curvilinear or arc-type roller apron~ a~ -.
.
, ,. ' , . ': . :
i~3~
shown in Figures 1 and 2. The principles of the invention al~o can be applied to continuous casting installation~ working with straight moldæ and partially straight roller apron~. With such an installation the dummy bar can be, for instanoe, introduced from the underside of the roller apron advantageously at the tran~ition between the straigllt roller apron portion and the curved roller apron portion.
In the ca~e of slab casting installations, the infeed location 10 can be provided with displaceable rollers for opening and cloqing ~uch infeed loeation. Moreover, the return of the du~my bar i9 not limited to the po~ibilities shown by way of example in Figures 1 and 2. It can be advantageous to use a long dummy bar which is introduced for instance through the withdrawal and ~traightening machine, or to in-troduce the dummy bar through the mold according to conventional solutions.
While there are shown and described present prefer~ed embodiments of the invention, it is to be di~tinctly understood -that the invention is not limited thereto, but may be otherwise variou~ly embodied and practiced withi~ the ~cope of the ~o lowing claims.
., : , , , - ,
Claims (9)
1. A continuous casting installation for metals, especially steel, for the production of a continuously cast strand, comprising:
a movable tundish for teeming molten metal into a continuous casting mold;
a subdivided, at least partially curved roller apron for the continuously cast strand;
a withdrawal and straightening machine arranged after the roller apron in the direction of travel of the continuously cast strand;
a runout roller table following the withdrawal and straightening machine;
two displacement carriages, each displacement carriage being selectively movable between a casting position and a preparatory position;
at least one unit comprising a continuous casting mold and a first part of the roller apron arranged after said mold carried by each displacement carriage;
said unit which is momentarily located in its casting position cooperating with a stationary second part of the roller apron;
a casting platform;
cover members provided for the casting platform and arranged above the displacement path of the displacement carriages between the casting position and the preparatory positions;
said casting platform cover members being arranged independent of the displacement carriages; and means for infeeding a dummy bar cooperating with the unit located in the casting position.
a movable tundish for teeming molten metal into a continuous casting mold;
a subdivided, at least partially curved roller apron for the continuously cast strand;
a withdrawal and straightening machine arranged after the roller apron in the direction of travel of the continuously cast strand;
a runout roller table following the withdrawal and straightening machine;
two displacement carriages, each displacement carriage being selectively movable between a casting position and a preparatory position;
at least one unit comprising a continuous casting mold and a first part of the roller apron arranged after said mold carried by each displacement carriage;
said unit which is momentarily located in its casting position cooperating with a stationary second part of the roller apron;
a casting platform;
cover members provided for the casting platform and arranged above the displacement path of the displacement carriages between the casting position and the preparatory positions;
said casting platform cover members being arranged independent of the displacement carriages; and means for infeeding a dummy bar cooperating with the unit located in the casting position.
2. The continuous casting installation as defined in claim 1, wherein:
each casting platform cover member is constructed as a tunnel which provides a casting platform floor arranged at a greater elevation than the casting platform.
each casting platform cover member is constructed as a tunnel which provides a casting platform floor arranged at a greater elevation than the casting platform.
3. The continuous casting installation as defined in claim 1, further including:
means for pivotably mounting each casting platform cover member in order to provide travel clearance for the associated displacement carriage.
means for pivotably mounting each casting platform cover member in order to provide travel clearance for the associated displacement carriage.
4. The continuous casting installation as defined in claim 1, wherein:
said stationary second part of the roller apron includes a first pair of rollers, viewed in the direction of travel of the strand, defining driving rollers;
a dummy bar-infeed location provided directly following said driving rollers for the infeed of a short dummy bar;
means defining an uncoupling location for the dummy bar arranged after the withdrawal and straightening machine;
said means for infeeding the dummy bar being arranged between the uncoupling location and the infeed location for infeeding the dummy bar.
said stationary second part of the roller apron includes a first pair of rollers, viewed in the direction of travel of the strand, defining driving rollers;
a dummy bar-infeed location provided directly following said driving rollers for the infeed of a short dummy bar;
means defining an uncoupling location for the dummy bar arranged after the withdrawal and straightening machine;
said means for infeeding the dummy bar being arranged between the uncoupling location and the infeed location for infeeding the dummy bar.
5. The continuous casting installation as defined in claim 1, wherein said means for infeeding the dummy bar comprises:
an intermediate platform;
a crane for infeeding the dummy bar;
a curved roller guide means, and an infeed table arranged upon the intermediate platform.
an intermediate platform;
a crane for infeeding the dummy bar;
a curved roller guide means, and an infeed table arranged upon the intermediate platform.
6. The continuous casting installation as defined in claim 1, wherein.
each said displacement carriage is structured substantially as a semi-gantry carriage and comprises a vertical support;
the mold of said carriage defining an oscillating mold; and said oscillating mold and said first part of the roller apron being secured at said carriage.
each said displacement carriage is structured substantially as a semi-gantry carriage and comprises a vertical support;
the mold of said carriage defining an oscillating mold; and said oscillating mold and said first part of the roller apron being secured at said carriage.
7. The continuous casting installation as defined n claim 1, further including:
frame means;
adjustment stop means provided for said frame means; and power means for displacing the displacement carriage which is in casting position against the adjustment stop means of said frame means.
frame means;
adjustment stop means provided for said frame means; and power means for displacing the displacement carriage which is in casting position against the adjustment stop means of said frame means.
8. The continuous casting installation as defined in claim 4, further including:
said withdrawal and straightening machine having rollers; and means for synchronously as well as independently driving said driving rollers associated with the infeed location and said rollers of the withdrawal and straightening machine.
said withdrawal and straightening machine having rollers; and means for synchronously as well as independently driving said driving rollers associated with the infeed location and said rollers of the withdrawal and straightening machine.
9. A continuous casting installation for metals, especially steel, for the production of a continuously cast strand, comprising:
tundish means for teeming molten metal into a continuous casting mold;
a roller apron for the continuously cast strand;
a withdrawal and straightening machine arranged after the roller apron in the direction of travel of the continuously cast strand;
two displacement carriages, each displacement carriage being selectively movable between a casting position and a preparatory position;
at least one unit comprising a continuous casting mold and a first part of the roller apron arranged after said mold carried by each dis-placement carriage;
said unit which is momentarily located in its casting position cooperating with a stationary second part of the roller apron;
a casting platform;
cover means provided for the casting platform and arranged above the displacement path of the displacement carriages between the casting position and the preparatory positions;
said cover means being mounted independent of the displacement carriages; and means for infeeding a dummy bar cooperating with the unit located in the casting position.
tundish means for teeming molten metal into a continuous casting mold;
a roller apron for the continuously cast strand;
a withdrawal and straightening machine arranged after the roller apron in the direction of travel of the continuously cast strand;
two displacement carriages, each displacement carriage being selectively movable between a casting position and a preparatory position;
at least one unit comprising a continuous casting mold and a first part of the roller apron arranged after said mold carried by each dis-placement carriage;
said unit which is momentarily located in its casting position cooperating with a stationary second part of the roller apron;
a casting platform;
cover means provided for the casting platform and arranged above the displacement path of the displacement carriages between the casting position and the preparatory positions;
said cover means being mounted independent of the displacement carriages; and means for infeeding a dummy bar cooperating with the unit located in the casting position.
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CH1608575A CH595909A5 (en) | 1975-12-11 | 1975-12-11 |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CA1064669A true CA1064669A (en) | 1979-10-23 |
Family
ID=4414351
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CA267,536A Expired CA1064669A (en) | 1975-12-11 | 1976-12-09 | Continuous casting machine for casting steel |
Country Status (8)
| Country | Link |
|---|---|
| JP (1) | JPS5272330A (en) |
| AT (1) | AT349667B (en) |
| BR (1) | BR7608279A (en) |
| CA (1) | CA1064669A (en) |
| CH (1) | CH595909A5 (en) |
| DE (1) | DE2655484C3 (en) |
| FR (1) | FR2334448A1 (en) |
| GB (1) | GB1508967A (en) |
Families Citing this family (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CH622194A5 (en) * | 1977-06-09 | 1981-03-31 | Concast Ag | |
| FR2495030A1 (en) * | 1980-11-28 | 1982-06-04 | Clesid Sa | Multi:track continuous casting machine - where each mould has tongs which clamp dummy starter billet, so casting can be started separately in each mould |
| DE3524553C1 (en) * | 1985-07-10 | 1986-07-31 | Mannesmann AG, 4000 Düsseldorf | Device for a short start-up line |
| DE4132185C2 (en) * | 1991-09-27 | 2001-03-08 | Sms Demag Ag | Cold strand guidance of a continuous casting machine |
Family Cites Families (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CH463709A (en) * | 1966-05-09 | 1968-10-15 | Bliss E W Co | Continuous casting process and installation for implementing the process |
| AT292937B (en) * | 1969-05-30 | 1971-09-10 | Voest Ag | Continuous casting plant for slabs |
| AU461822B2 (en) * | 1970-07-21 | 1975-06-05 | Comcast Ag | Continuous casting plant for steel |
| FR2155807A2 (en) * | 1971-10-06 | 1973-05-25 | Creusot Loire | Continuous casting appts - with ingot mould oscillating motor remote from the ingot mould carriage |
-
1975
- 1975-12-11 CH CH1608575A patent/CH595909A5/xx not_active IP Right Cessation
-
1976
- 1976-12-08 DE DE19762655484 patent/DE2655484C3/en not_active Expired
- 1976-12-09 BR BR7608279A patent/BR7608279A/en unknown
- 1976-12-09 CA CA267,536A patent/CA1064669A/en not_active Expired
- 1976-12-09 AT AT912176A patent/AT349667B/en not_active IP Right Cessation
- 1976-12-10 GB GB5177076A patent/GB1508967A/en not_active Expired
- 1976-12-10 FR FR7637368A patent/FR2334448A1/en active Granted
- 1976-12-11 JP JP14832676A patent/JPS5272330A/en active Pending
Also Published As
| Publication number | Publication date |
|---|---|
| ATA912176A (en) | 1978-09-15 |
| FR2334448B1 (en) | 1982-10-29 |
| DE2655484B2 (en) | 1978-11-30 |
| JPS5272330A (en) | 1977-06-16 |
| AT349667B (en) | 1979-04-25 |
| DE2655484A1 (en) | 1977-06-23 |
| BR7608279A (en) | 1977-11-29 |
| GB1508967A (en) | 1978-04-26 |
| DE2655484C3 (en) | 1979-07-26 |
| FR2334448A1 (en) | 1977-07-08 |
| CH595909A5 (en) | 1978-02-28 |
Similar Documents
| Publication | Publication Date | Title |
|---|---|---|
| US3273208A (en) | Interchangeable continuous casting apparatus | |
| US3344844A (en) | Apparatus for handling a curved continuous casting starting bar | |
| JP3948750B2 (en) | Metal supply system for continuous casting machine | |
| CN109834250A (en) | A kind of mobile steel (iron) water pot is tumbled equipment and casting method | |
| CA1064669A (en) | Continuous casting machine for casting steel | |
| CN210820144U (en) | Pouring device for refractory material product | |
| PL178460B1 (en) | Device designed for feeding and changing of casting pipe in a system for continuous casting of slab ingots | |
| JP3007941B2 (en) | Metal strip casting method | |
| US3218682A (en) | Apparatus for molten metal supply changeover during casting | |
| CN213944866U (en) | Small-volume accurate casting machine | |
| CN1076646C (en) | Opened water cooled die casting machine | |
| FI56495C (en) | OVER ANCHORING FOR METAL PROTECTION WITH METAL I IN STRAENGGJUTNINGSKOKILL | |
| US5494201A (en) | Device for inserting a retractable blank shutting off plate in a device for the conveyance and exchange of a pouring tube | |
| CN109465432B (en) | Smelting furnace system | |
| KR101175629B1 (en) | Apparatus for mounting shroud nozzle | |
| CN112296292A (en) | Operation method for continuous casting of double-flow plate blank | |
| CN2301274Y (en) | Quick constant diameter gate replacing device for billet continuous casting tundish | |
| US3334683A (en) | Trough shifting and dumping apparatus | |
| US4234036A (en) | Arrangement at a continuous casting plant | |
| US4453589A (en) | Arrangement for continuously casting a metal strand | |
| CN216028057U (en) | Automatic immersion nozzle changing device for slab continuous casting | |
| GB2029294A (en) | Method of changing the cross sectional format of a strand being continuously cast | |
| CN1063689C (en) | Chain arc type continuous caster | |
| CN115351270B (en) | Fixing device of tundish bottom electromagnetic cyclone nozzle equipment | |
| CA1192018A (en) | Starter apparatus for a continuous casting plant, especially for casting steel strands |