CN85106442A

CN85106442A - The continuous pouring device of metal tape, particularly steel band

Info

Publication number: CN85106442A
Application number: CN198585106442A
Authority: CN
Inventors: 弗里茨·彼得·普里谢特尼格
Original assignee: Mannesmann AG
Current assignee: Vodafone GmbH
Priority date: 1984-11-03
Filing date: 1985-08-27
Publication date: 1987-02-25
Also published as: JPS61123451A; DE3440237A1; DE3440237C2; EP0181567A1

Abstract

In the direct casting device of this metal tape, particularly steel band, be in metal bath (2) under the pressure and can be communicated with principle by pipeline and be transported to the crystallizer (3) from a reservoir (1).

The difficulty that often occurs in the band continuous pouring process, as the difficulty in molten metal (2) is poured into the extremely narrow mold time control, the present invention wants to make the molten metal (2) that under high pressure is arranged in partially enclosed hold-up vessel (1) to export by a connor gate (5) that is positioned at the container top, at least the downside (3a) in sealing cast cross section (7) has one can introduce along the strand side and with the film (6) of poring rate running, this film (6) and cast strip (9) are positioned on their the cooling guide rail (10).

Description

The continuous pouring device of metal tape, particularly steel band

The present invention relates to by molten metal, particularly by the continuous pouring device of molten steel cast strip, wherein be in molten metal under the pressure and can be communicated with principle by pipeline and be transported to another crystallizer from a hold-up vessel.

Such device can move according to the following procedure: at first molten metal controlledly is input to fixing (non-vibrating) continuous pouring mold from a molten device of storage and cast gate, in mold and then controlledly pull out continuous-cast blank, and in cast, make a heat-pesistant thin film be attached to the side in cast cross section at least continuously and travel forward together with poring rate.

The basis of creating the cast strip production new technique is physical principle and technical possibility, can with casting method give minimum compression ratio that prepared material produces greater than 3, this coefficient can satisfy the desired material characteristics of rolling hot-rolled band.

Yet the compression ratio of the slab continuous casting of traditional handicraft (200 of thickness arrives 300mm)/hot-rolled band (roughing train, middle machine row, a finishing mill line) is greater than 30.All other production lines, as section bar, seamless pipe and slab, their compression ratio is in 3 to 10 scopes at present, this just causes cancel all roughing train and middle machine row and partial cancellation finishing mill line greater than 3 these targets from dropping to greater than 30 with compression ratio, thereby produce a new technology, this technology helps the shortening significantly of technological process line, makes the cost that is transformed between the hot-rolled band finished product from cast strip reduce greatly then.

Prior art can be divided into following technological process, and the independently implication that matches is therewith arranged basically:

Mould oscillation is all wanted in the continuous pouring of metal in vertical continuous casting or horizontal casting, or rather, promptly carry out under the situation of the relative motion between the mold of continuous billet casting and level.When using portable mold, promptly under mold, use some to belt feeder, roll, chain and other similar means.

Task of the present invention is, avoids the difficulty that often occurs in the band continuous pouring process, as the difficulty that the control aspect is produced when being injected into extremely long slit mold.

Above task can solve according to first kind of scheme of the present invention, promptly the connor gate above the molten metal in partially enclosed hold-up vessel under the pressure prerequisite that improves can be positioned at container by flows into, at least the film of downside that is attached to the cast cross section of sealing moves along with the strand side and with the poring rate running, film and cast strip are positioned on their the cooling guide rail.This assembling provides the accurate metering of molten metal, and available in case of necessity sealing gland is so that can keep giving the speed of pulling out that provides earlier.Additional pressure has then improved foundry goods

Density.In addition, the pressure of regulation also plays and makes cast strip be close to the effect of cooling off on the guide rail.On the other hand, the advantage of this film is to have saved a special vibrating device, can make that also the heat transmission in the cooling guide rail is interference-free.

A kind of preferential assembling form of the present invention is, this connor gate is contained in overfall on the guide level and one by one and can forms at the cold roll that the Cast Strip direction of motion moves.

According to the present invention, proposing above of task also can be solved by second kind of scheme.Just at the molten metal that improves the hold-up vessel that is arranged in top seal under the pressure prerequisite by connor gate vertical output to a board-like continuous pouring mould, and the broad side surface that can be between slit inlet and the flat continuous pouring mould of cooling type be attached to two correspondences with a film at least moves together along with the strand side and with poring rate synchronous operation.Except having accurate measurement, foundry goods

Outside the advantage of the good and rapid heat dissipation of density, this assembling is the coiled material processed of pourable thin strand also, and it is minimum to be out of shape possibility in this strand winding process afterwards.

Further improvement project of the present invention is that film passes between overfall and cooling guide rail.Its advantage is to have avoided vibration, and poring rate can be high, and the heat radiation of mold wooden partition can be carried out smoothly.

According to further inventive concept, the hold-up vessel of adjacent metal liquation is provided with a balancing gate pit, and this chamber communicates with hold-up vessel by an opening that is positioned at the dividing plate bottom.

Another improvement project of the present invention be overfall install at least one that mix up by Cast Strip thickness or or adjustable cold roll as crystallizer.This cold roll has replaced the film of continuous Cast Strip upper side, but also can regulate the thickness of Cast Strip.

Advantage is on the other hand, the contraction of available following method compensation Cast Strip, promptly along the direction of motion of Cast Strip another cold roll is installed behind above-mentioned cold roll again, all cold rolls are all twined by a film, and wherein at least one cold roll can rotate with the Cast Strip movement velocity.The advantage of this device is the controllability of cold roll, these cold rolls must before and after evenly distributed and be positioned at different height.

The border of Cast Strip can guarantee that promptly the not end at cold roller is equipped with the edge slicer that its spacing equates with the Cast Strip width with following measure.

The present invention has also avoided reoxidizing of casting process critical stage molten metal, and method is to be attached in the balancing gate pit of hold-up vessel to be filled with inert gas.

Embodiments of the invention and are described in detail as follows at this as shown in drawings.

They are:

Fig. 1 is the side view of first embodiment of device.

Fig. 2 is an alternate embodiments of device, is the part side view equally.

Fig. 3 is the front view of Fig. 2 device.

Fig. 4 is the vertical section of another selected embodiment of device.

Fig. 5 is the horizontal profile of V among Fig. 4-V hatching.

Band continuous pouring device according to Fig. 1 has a hold-up vessel 1, molten metal 2(liquid steel) flow into crystallizer 3 thus.Molten metal 2 is carried by an adjustable pressure reduction dp/dt from balancing gate pit 4.Hold-up vessel 1 has only a connor gate 5 by be connected with balancing gate pit 4 entire container sealing of molten metal 2, and this cast gate is made of dull and stereotyped 5a of superincumbent nozzle and the following dull and stereotyped 5b of nozzle.The downside 3a of the crystallizer 3 that is produced thus is used for introducing film 6.In addition, cast cross section 7.For example by

sidewall

8a and 8b the narrow side of Cast Strip 9 is limited according to Fig. 3 such.Here, film 6 is close on the guide rail, and this guide rail is derived hot-fluid dQ/dt from metal bath.

Film 6 can be made by various material.Can consider with aluminium strip and steel band as metallic film.Yet film 6 also can be used the thick resistant to elevated temperatures ceramic membrane of 0.1mm for example.Also can further consider the palpus epitaxial that adopts glass fibre membrane and carbon-fiber film and single crystal carbon.Certainly, film 6 also can use the mixed form of above-mentioned material.Here the adaptive temperature variation of the equal energy of the material of mentioning also has heat conductivility preferably.In addition, also can imagine, film 6 uses with a metal tape that supports it, but this metal tape does not directly contact liquid molten metal 2 or the outside cast strip that has solidified.In this case, film 6 can stop cold metal tape and heat cast strip between bonding.In principle, film 6 can play and remove crystallizer 3 from

Moving effect.Pour this difficult problem in the narrow crystallizer into as for the metal bath that temperature is about 1500 ℃ (molten steel), can by with balancing gate pit 4 in be higher than the connor gate 5 that atmospheric pressure is connected and solve.According to second embodiment (Fig. 2 and Fig. 3), connor gate 5 is made of the overfall 11 that is positioned at horizontal plane 12, and wherein cold roll 13 is under the jurisdiction of cooling guide rail 10 as a part of crystallizer 3.In order to regulate different Cast Strip thickness the cold roll 13 that is driven in rotation install can be along direction of arrow up-down adjustment.Therefore, the connor gate 5 here constitutes jointly by cooling off guide rail 10 or film 6 and cold roll 13.It is the same cold with guide rail 10 that the preliminary metering effect that overfall 11 plays molten metal is used for roll 13, so cooling is carried out in connor gate 5.

According to other embodiment (Fig. 4), connor gate 5 is arranged on the vertical direction of motion (dm/dt).Here a kind of flat continuous pouring mold 15 of preferential selection, this mold can be derived hot-fluid dQ/dt by copper coin.Film 6 always is positioned on two corresponding broad side surfaces of flat cast mold 15, and wherein slit inlet 16 imports the film 6 of closed shuttling movement thus.Pass to cooling device 17 by the hot-fluid major part that film 6 is derived.Here, film 6 is always around initiatively and on the driven

deflector roll

18 and 19 turning round with poring rate Vg.

In the embodiment of Fig. 2 and Fig. 3, film 6 passes between overfall 11 and cooling guide rail 10.In any case, molten metal 2 all must pass the opening 20 that dividing plate 22 forms by base plate 21 and also promptly flow into hold-up vessels 1 with balancing gate pit 4.

The present invention can also implement from the mode of other variation: according to the embodiment of Fig. 2, allow to settle a cold roll 13, not have the film 6 of termination to be wrapped in rotation on two cold rolls 13 again along the Cast Strip direction of motion in cold roll 13 backs.One of them cold roll 13 is driven rotation with poring rate.Poring rate Vg must be equal with the Cast Strip movement velocity.

The border, side of Cast Strip 9 can be by

sidewall

8a, 8b(Fig. 3) place restrictions on, also can be by edge slicer 23(Fig. 3) place restrictions on, these sections can be by required Cast Strip width adjustment.In addition, the similar guider of being introduced among available and Fig. 1, Fig. 2 and Fig. 4 is introduced additional film 6.Such example illustrates at Fig. 5.Be illustrated in the film of both sides among the figure with 6a and 6b.

Fig. 4 has also comprised another embodiment.The hold-up vessel 1 here extends to connor gate 5 always, and wherein (illustrated left side) molten metal 2 of not having a thermograde flows on the cast cross section 7 from " contraction mouth " 24 of a protrusion and in there cooling suddenly quickly.Right-hand part shown in Fig. 4 has constituted another selection scheme to this, and wherein hold-up vessel 1 imports to molten metal 2 on the cast cross section 7 by the vertical next door 25 of a part.

Claims

1, by molten metal, particularly by the continuous pouring device of molten steel cast strip, wherein being in molten metal under the pressure can be communicated with principle by pipeline and be transported to another crystallizer from a hold-up vessel, the invention is characterized in, the molten metal (2) that under high pressure is arranged in partially enclosed hold-up vessel (1) can be by connor gate (a 5) output that is positioned at container (1) top, at least having at the downside (3a) in cast cross section (7) of sealing one can be along the strand flank movement and with the film (6) of poring rate running, and this film (6) and cast strip (9) are positioned on the cooling guide rail (10) of film (6) or cast strip (9).

2, according to the device of claim 1, it is characterized by, connor gate (5) is positioned at overfall (11) on guide rail (10) horizontal plane (12) and one by one and can constitutes at the driven cold roller of the Cast Strip direction of motion (13).

3, by molten metal, particularly by the continuous pouring device of molten steel cast strip, wherein being in molten metal under the pressure can be communicated with principle by pipeline and be transported to the crystallizer from a hold-up vessel, it is characterized by, the molten metal (2) that under high pressure is arranged in the hold-up vessel (1) of top seal vertically flows into a flat continuous pouring mold (15) by a connor gate (5), and wherein having on corresponding two broad side surfaces between the flat continuous pouring mold (15) of slit inlet (16) and cooling at least one can be along strand flank movement and the film (6) that moves with poring rate.

4, according to the device of claim 1 and 2, it is characterized by, film (6) passes through between overfall (11) and cooling guide rail (10).

5, according to one of them device of claim 1 to 4, it is characterized by, the hold-up vessel (1) of adjacent metal melt (2) has a balancing gate pit (4), and this balancing gate pit is connected with hold-up vessel (1) by the opening (22) on dividing plate (22) bottom (21).

6, according to the device of claim 1,2 and 4, it is characterized by, be at least overfall outer (11) mend adorn one by Cast Strip thickness cold roll that mix up or adjustable (13) as crystallizer (3).

7, according to the device of claim 6, it is characterized by, along the Cast Strip direction of motion an other cold roll (13) is housed at least also afterwards at cold roll (13), thin film (6) is wrapped on these cold rolls and rotates, and at least one cold roll (13) is to be driven rotation with poring rate.

8, according to any device of claim 1 to 7, it is characterized by, these cold rolls (13) have the edge slicer (23) that spacing equates with the Cast Strip width at afterbody.

9, according to any device of claim 1 to 8, it is characterized by, be attached in the balancing gate pit (4) of hold-up vessel (1) and be filled with inert gas.