RU2370338C2 - Installation for continuous cast and method of alternate casting either wide work piece or maximally two times narrower - Google Patents

Abstract

FIELD: metallurgy. ^ SUBSTANCE: invention refers to metallurgy, particularly to installation for continuous cast of one wide or two work pieces two times narrower; installation consists of at least one distributing ladle, of crystalliser resting on facility of reciprocal motion, and of unit of work piece drawing located behind facility of reciprocal motion. By choice one or two crystallisers are arranged in the head part of the installation, also crystallisers can be replaced; further, the installation is equipped with one or two mechanisms of reciprocal motion and with two units for work piece drawing, also with two drive mechanisms for separate and synchronous drive of reciprocal motion mechanisms and units of work piece drawing. ^ EFFECT: control over individual requirements of each cast work piece; possibility to proceed with trouble-free casting of one work piece in case of problems with another. ^ 20 cl, 17 dwg

Description

The invention relates to a continuous casting installation and a casting method, optionally, of a wide billet or a maximum of two times narrower billets compared to it. A continuous casting installation comprises at least one distribution ladle, a mold supported by a reciprocating device and a workpiece pulling unit located after it.

The concepts of “wide billet” obtained by continuous casting and “narrower than billet”, as used in the present description, it should be understood that the width of one cast wide billet is greater than the sum of both cast at the same time more narrow blanks. For example, in such a continuous casting plant, a wider workpiece with a width of 3000 mm or, alternatively, two workpieces with a width of 1300 mm each can be cast, and when casting two workpieces, they can also have a different width.

By preform, it is preferable to understand a steel preform obtained by continuous casting, and other metal preforms, for example, based on aluminum or aluminum alloys, are also possible. Under the installation of continuous casting should be understood, for example, the installation of continuous casting of steel.

To increase the possibilities of using a continuous slab casting plant for casting wide billets, it has long been known in the prior art to design crystallizers in such a way that, by choice, a wide billet or several billets with a smaller width compared to it can be cast.

So, for example, it is already known from DE-B2003787 that in an existing mold with a cross section of a slab, the inner volume of the mold being formed by two wide side walls and two rearranged narrow side walls, at least one dividing element is used to obtain at least two spatially separated from each other internal volumes of the form. This dividing element, fixed between the wide side walls of the mold for slabs, carries shaping narrow side walls, which, to the same extent as the opposing narrow side walls of the mold for slabs, are regulated by their inclination to the casting direction depending on the width of the workpiece. However, in such continuous casting plants it is not possible to individually intervene in the manufacturing conditions of individual parallel casting blanks. If a violation occurs on one of several workpieces, it is impossible to change the casting conditions specifically for this workpiece, for example, reduce or increase the casting speed, or change the parameters of the reciprocating movement for this workpiece. A significant drawback of this known form of execution is that in case of violation on one workpiece, the casting parameters for all workpieces must change, or, in special cases, the casting process for all workpieces must be interrupted. Another drawback of this embodiment is that when casting two billets, it is essentially impossible to average the placement of the casting pipe with variable widths of the casting billets, due to the rigidly set distance between both casting pipes in the distribution ladle.

A continuous casting unit is known from DE-A3706720 for the simultaneous casting of two metal billets, and two molds positioned independently of each other are installed in a common table support of the mold swinging mechanism. The bottom rollers are attached to both molds, and in the direction of casting, a knot for pulling the workpieces adjoins them to support and guide the workpieces obtained by continuous casting. A reciprocating movement interacts with this table, so that both molds must forcefully perform a given reciprocating movement, therefore, individual setting of parameters for each casting blank is excluded.

From DE-A2702894 a multi-strand continuous casting plant is exclusively known for simultaneously casting at least two metal billets, in which the distance between two adjacent billets should be reduced due to special design measures in order to keep the length along the distribution ladle as small as possible. This is achieved due to the special arrangement of the drives of the pulling rollers. On the one hand, drive shafts built into each other are offered, which make it possible to arrange all drives on one side of the installation, and on the other hand, it is proposed to place drives above the continuous casting installation. This document also provides links to a dual continuous casting plant with which slabs and blooms (crimped ingots) can be produced simultaneously. At the same time, the difficult production conditions of such plants are indicated, moreover, in particular, at the initial phase of the casting process, the melt is supplied and the workpiece is pulled simultaneously.

Therefore, the aim of the present invention is to overcome the disadvantages of the prior art and improve the installation of continuous casting and a method for casting, optionally, a wide billet or a maximum of two times narrower billets compared to it, while you can specifically intervene or respond to the individual requirements of each cast billet, without affecting the corresponding other cast billet.

An additional advantage of the present invention lies in the fact that when parallel casting of two narrower workpieces occurs when violations occur on one workpiece, the casting of this workpiece can be interrupted, if necessary, and the process of casting another workpiece can continue unhindered.

This task, based on the continuous casting plant described above, is solved by the fact that the continuous casting plant contains space for accommodating one or two molds, and there are two reciprocating mechanisms and two workpiece pulling units with corresponding drive mechanisms for separate and synchronous actuation reciprocating mechanisms and workpiece pulling units.

Each of the two reciprocating mechanisms that are functionally independent of each other can also include several, but preferably two reciprocating mechanisms, which are synchronously actuated in each operating situation, for stable support of each mold.

The space for accommodating one or two molds is limited in the direction of movement of the workpiece by at least two reciprocating mechanisms on which one or two molds are supported. For the case where two molds are placed, each mold is attached to the reciprocating mechanism, and they can be driven independently of each other. For the case where only one mold is provided for casting a wide billet, this mold relies on both reciprocating mechanisms and they are driven synchronously. For structural reasons alone, it is advisable if each mold for casting a narrower workpiece relies on two reciprocating mechanisms, which are separated from each other by free space for the passage of the cast workpiece, but are always driven synchronously. In this sense, four reciprocating mechanisms were then assigned to the mold for casting a wide billet.

Similarly, when casting two narrow slabs, both nodes pulling the workpieces, of which, respectively, each refers to one casting workpiece, are driven independently of one another. When casting a wide workpiece, which requires both nodes to pull the blanks to support it, these nodes to pull the blanks are driven synchronously, due to which lateral withdrawal of the workpiece can be eliminated.

All molds used are preferably made as molds of adjustable width and have devices for moving narrow side walls to adjust the width of the cast billet and devices for adjusting the casting cone, depending on the width of the cast billet, on at least one of the narrow side walls.

To ensure the synchronous operation of both reciprocating mechanisms during casting of a separate wide workpiece, each of the two reciprocating mechanisms corresponds to a drive mechanism for generating reciprocating motion, and these drive mechanisms are associated with a synchronizing device for setting the conditions of a coordinated reciprocating displacement. When two narrower workpieces are cast at the same time, or when for some reason only one of the two narrower workpieces is cast, the synchronizing device is turned off, and the optimal casting conditions are established for each workpiece being cast.

Preferably, the synchronizing device for setting the conditions of the synchronous reciprocating movement is formed by the Central computing unit.

Each reciprocating mechanism includes a hydraulic actuator, for example a controlled hydraulic cylinder, and a control unit that controls the reciprocation of the hydraulic actuator. The control unit via signal lines is connected to the computing unit, from which the set values are transmitted to the control unit. The reciprocating mechanism may include, instead of a controlled hydraulic cylinder, for example, an adjustable eccentric drive.

Each reciprocating movement mechanism includes a support block for supporting the mold, and quick release couplings are placed on the support surface of each support block and the corresponding opposite supporting surface for supplying a working medium (cooler, current, for pipelines of the pressure transmission medium, signaling lines, etc.) and at least one guide mechanism and a centering mechanism. This ensures a quick and automated change of molds.

A quick and reliable change of molds is achieved if at least one manipulator for changing molds, preferably a transfer trolley, is placed on the casting site. The change of molds, in the corresponding case, while simultaneously changing the first element of the workpiece pulling unit next to the mold, can also be carried out by means of a workshop (hoisting) crane located on the casting site.

The space for accommodating one or two molds is adjoined by two workpiece pulling units running parallel in parallel to each other, by means of which one or both of the workpieces cast are supported on opposite sides and are guided accordingly. These two workpiece pulling units include roller support stands with several driven rollers and a number of non-driven rollers, the driven rollers being connected to the drive mechanisms and the driving mechanisms of the rollers of both roller supporting stands connected to a synchronizing device for setting synchronous rotation conditions for the driven rollers .

The roller support stand, as is usual for modern continuous casting plants, is divided into many consecutive segments, and some pairs of rollers in the workpiece pulling unit, at least one for each segment, are connected to the drives and provide controlled delivery of the cast workpiece with the intended drawing speed (casting speed).

Preferably, the synchronizing device for setting the conditions for synchronous rotation of the driven rollers in the workpiece pulling unit is formed by a central computing unit.

A preferred embodiment of the roller support stands is that the rollers or pairs of rollers that interact during the casting of a wide billet are supported by a common support frame or segmented frames following one after another. So that, despite this, when casting two separate billets, individual efforts could be applied to both billets, rollers of a pair of rollers having the possibility of relative motion, or rollers of a group of pairs of rollers having the possibility of relative motion, in each of both roller supporting stands are fixed on independent roller holders that rest on a common support frame or segmented frame.

Each drive mechanism of the driven roller is connected to it through a cardan shaft or another drive shaft and is located laterally outside of both adjacent to each other roller supporting stands of the workpiece pulling unit. If the space provided for this is insufficient, for example, due to the placement of one or more nodes for pulling the blanks of a multi-strand continuous casting unit or other independent continuous casting unit, there is also the possibility that the drive rollers are connected to the drive mechanism through a planetary gear and an angular gear, and place the drive mechanism in a raised position on the side above both adjacent adjacent roller support stands of the workpiece draw unit.

In the outlet zone of the continuous casting installation, each billet pulling unit at the next to the billet drawing unit is provided with an independent billet cutting device for transverse cutting of one of the two narrower billets being cast in parallel, and each of these billet cutting devices contains at least one separation element. As dividing elements for the transverse cutting of slabs, flame cutting installations are usually used. Thus, for both workpiece cutting devices, it is possible to cut two workpieces, cast simultaneously at different speeds, independently of each other, and, as appropriate, also into slabs or blooms with different lengths.

Preferably, both workpiece cutting devices are arranged one after another in the workpiece feed direction, wherein each workpiece cutting device overlaps both parallel passing workpiece pulling units, or fire cutting rolls located in this area, and therefore each of the workpiece cutting devices has the option, perform cross cutting of one of both parallel cast pieces.

At least one of both workpiece cutting devices is equipped for transverse cutting of a wide workpiece with two interacting separation elements, the corresponding separation element corresponding, respectively, to one fire cutting roller table. When transversely cutting a wide workpiece, the direction of cut follows with a slight temporary shift from the edges of the workpiece inward, as is the case in traditional continuous casting installations for transverse cutting of wide workpieces. The second workpiece cutting device is in this case in the standby position.

According to an alternative embodiment, both workpiece cutting devices are placed next to each other and during the cutting process are moved in the direction of the workpiece feed along the crane runways, which are placed at some distance above the fire cutting rolling table. In order to synchronize movement during joint transverse cutting of a wide workpiece, both workpiece cutting devices are fixed to each other by a mechanical coupling, which is preferably actuated electro-hydraulically. Both workpiece cutting devices can also be equipped with separate displacement drives, and these displacement drives are assigned a synchronizing device, which is controlled from a central computing unit. Preferably, each blank cutting device comprises at least one spacer element, preferably formed by a fire cutting unit, which is positioned on the movement mechanism and allows lateral movement relative to the feed direction of the cast blank, the movement zone of at least one of these spacer elements one device for cutting the workpiece protrudes into the zone of movement of one of the separation elements of another installation for cutting the workpiece.

After the workpiece pulling units and the workpiece cutting devices related thereto, output roller tables are arranged to which a lateral movement device is attached for the changing transport direction of the cut workpieces diverted across the workpiece feed direction.

Between the casting ladle and the mold or molds there is a distribution ladle for molten metal. This distribution bucket has several outlet openings for molten metal arranged in a row, which correspond to locking elements, which are connected by means of signal lines to the central computing unit and configured to be activated depending on the casting format of the molds or molds located downstream. The locking elements are formed by gates or plugs, which are traditionally used in continuous casting plants.

To start the continuous casting installation according to the invention, two seeds are introduced through the workpiece pulling unit to the end zone from the outlet side of one mold or two molds, which, when using two molds, are equipped with separate seed heads, and when using one mold, a common seed head.

Compared with the traditional double-strand continuous casting installation, the design according to the invention has the following advantages:

- when casting one workpiece with a slab width of up to 3500 mm, alternatively, two workpieces with a width of up to 1600 mm can be cast simultaneously;

- during the construction of the installation significantly reduces the cost of the foundation and steel structure,

- one compact distributor can be used for all production options,

- auxiliary equipment, in particular, for the workpiece pulling unit (Banane), is required only in double volume, instead of 4 times,

- the cost of investment for a continuous casting plant is reduced by a total of about 20%.

Compared to the traditional “twin casting plant”, which is known, for example, from the aforementioned document DE-B2003787, a continuous casting plant having a structure according to the invention has the following advantages:

- a separate, independent technological mode is ensured only by separate crystallizers, separate reciprocating mechanisms, separate drives and separate devices for cutting the workpiece,

- when two-strand casting mode, the beginning of the casting of the workpieces can be carried out independently

- leading the breakthrough process is possible independently for each line,

- during a breakthrough, further casting with one (other) line is possible,

- change of the filling pipe can be carried out independently of the second line.

In addition, the invention provides a method for casting, optionally, a wide billet or two narrower billets compared to it in one continuous casting unit, wherein at least partially solidified billet is formed in one mold, and in the subsequent unit for drawing the billet, at least partially hardened billet is supported and removed. The problem underlying the invention is solved in that the casting parameters for casting each individual workpiece can be set and adjusted individually. This includes, when casting a single wide billet, synchronous installation and adjustment of the respective casting parameters and individual installation and adjustment of the corresponding casting parameters when parallel casting of two billets.

Moreover, the casting parameters, which fundamentally provide individually adjustable and adjustable casting of each workpiece, are the parameters of the reciprocating motion of the mold of each individual workpiece in the mechanism of the reciprocating movement and the casting speed or the drawing speed of each individual workpiece.

Further ensuring the flexibility of the production process results from the possibility of individual regulation of the cross-sectional shapes of each cast billet within certain specified values.

Preferably, the method according to the invention is characterized in that one mold is used for casting one wide preform in a continuous casting unit, which is supported by at least two synchronously controlled reciprocating mechanisms, and the cast preform is supported and drawn in two synchronously operating knots for pulling billets, and for casting two narrower billets in a continuous casting unit, two molds independent of each other are used, to which rely, respectively, on at least one reciprocating movement mechanism, which operates independently of the other reciprocating movement mechanism, and the cast billets are supported and drawn in the pulling units of workpieces controlled separately from each other.

Other advantages and features of the proposed invention arise from the following description of non-restrictive examples with reference to the drawings, which show the following:

Figure 1 is a longitudinal section of a continuous casting installation, corresponding to the invention, with its essential components,

Figure 2 is a view in plan of the placement of two molds for the independent casting of two workpieces,

Figure 3 is a view in section along the line BB in Figure 2 of molds and reciprocating mechanisms for independent casting of two workpieces,

Figure 4 is a cross-sectional view of crystallizers and reciprocating mechanisms for casting a wide workpiece in a representation similar to that shown in Figure 3,

Figa is a structural diagram for regulating the reciprocating movement of the mechanisms of the reciprocating movement with independent casting of two workpieces,

Fig.5b is a structural diagram for controlling the reciprocating movement of the reciprocating mechanisms when casting a wide workpiece,

6 - distribution bucket in the working position above the mold for casting a wide billet,

Fig.7 - distribution bucket in the working position over two placed next to each other molds for casting two narrower workpieces,

Fig. 8 illustrates a workpiece pulling unit according to the invention, in cross-sectional view, transverse to the direction of movement of the workpiece,

Fig.9 - the placement of two continuous casting plants corresponding to the invention, with partially raised drive mechanisms,

Figure 10 is a structural diagram for synchronizing nodes pulling workpieces when casting two narrower workpieces,

11 - placement of the nozzles and the injection scheme when casting a wide slab,

Fig - placement of the nozzles and the injection scheme when casting two narrower slabs,

Fig - two fire cutting device for the transverse cutting of a cast billet in a top view,

Fig. 14 is a transverse transport mechanism for removing a wide slab from an output roller table of a continuous casting installation,

Fig - mechanism of transverse transportation for removal of two slabs from the output conveyor of the continuous casting installation,

Fig - seed for filling the mold for casting a wide billet,

Fig - seed for filling two molds for the simultaneous casting of two workpieces.

The installation according to the invention for continuous casting of slabs for casting, optionally, a single wide billet or two narrower billets compared to it, with its essential components, is schematically shown in longitudinal section in FIG. This continuous casting installation includes, in a sequence of steps for manufacturing one or two blanks with a slab cross-section, essentially components and functions, as described below.

Starting from the casting ladle 1 for receiving a portion of molten steel, the molten steel flows through the protective tube 2, at an adjustable flow rate, into the distribution ladle 3. From there, the molten steel is introduced through a number of submersible casting cups 4, with an adjustable flow rate, into one or two cooled and performing reciprocating motion of the mold 5, where the solidification of the molten steel begins on the inner walls, and the blank 6 is formed in accordance with the shape specified by the inner walls of the crystallization torus, with a continuously growing hardened crust of the workpiece and with a liquid core. The mold 5 is based on a reciprocating mechanism 7, from which a predetermined reciprocating motion is transmitted to the mold 5, which is influenced by the cross section of the cast billet, the casting speed and the quality of the steel for the molten steel being cast. The workpiece 6, directed vertically downward, after exiting the mold 5 with support on the workpiece 8, is guided and cooled again and diverted from the vertical direction to the horizontal direction. The workpiece pulling unit 8 includes roller support stands 9, 10 (outer arc, inner arc) for supporting both wide sides of the workpiece, which have a tight nozzle of irreducible rollers 11 and driven rollers 12 and form a transport channel for the workpiece. The rollers 11, 12 of both roller support stands 9, 10 are arranged in segments and are supported by interchangeable segmented frames 13, following one after another in the workpiece pulling unit. In particular, in the case of a direct mold 5, the first segment following the mold is configured as a bend zone 14. The output roller table 15 is adjacent to the workpiece pulling unit 8, after the workpiece dressing zone, to the last section of the workpiece pulling unit, in the zone of operation of the workpiece cutting device 16, for transverse cutting of a fully hardened workpiece here, the output work table is made as a fire cutting roller 22. As the separation elements 17 are used installation 18 fire cutting. In the further lateral movement device 19, the preform segments cut in the preform cutting device into measured lengths are removed from the zone of the output roller table 15. In addition, a manipulator 20 is provided in the zone of the output roller table 15 to enter the seed 21, which locks the outlet at the beginning of the casting process mold opening 5. In a continuous casting installation according to the invention, for casting, optionally, a wide billet or a maximum of two times narrower billets compared to it, these essentially The unit components of the installation are constructed in a special way, as described in more detail below.

An essential component of the continuous casting apparatus according to the invention is a mold for casting a wide workpiece or both molds for casting two workpieces narrower than it, and reciprocating mechanisms supporting these crystallizers. They are shown in FIG. 4 for casting a wide workpiece and in FIGS. 2 and 3 for casting two workpieces narrower compared to it. Figures 2 and 4 show in dashed lines the limited space 25 in the continuous casting head for positioning, optionally, a mold 5 or two molds 5a, 5b, the limited space 25 in the casting direction G of the respective workpieces being limited by the supporting blocks 26 of the reciprocating mechanisms 7 the movements on which the mold 5 or both of the molds 5a, 5b are supported. The molds can be easily removed from this space 25 by means of the manipulators 27 and reinstalled or replaced. As suitable manipulators for this replacement process, either a replacement trolley 28 with appropriate gripping mechanisms and two places for interchangeable molds, or a workshop crane 30 serving the casting platform 29 are suitable (FIG. 1). The molds 5, 5a, 5b generally have two wide side walls 31 and two narrow side walls 32, 33 clamped between the wide side walls.

In the case of a mold for casting a wide billet 6 (Figure 4), both opposite wide side walls 32, 33 are placed at the same distance from the central axis 34 of the mold and provide a symmetrical setting of the mold and the conicity of the mold relative to this central axis 34 of the mold using the appropriate mechanisms 35 for moving narrow walls, as is the case in a conventional single-strand slab continuous casting installation. The mold 5 is based on four reciprocating mechanisms 7a, 7b, which, with synchronous vertical movement, provide the desired reciprocating motion of the mold.

Both molds 5a, 5b for casting, optionally, two workpieces are supported, at the minimum possible distance from each other, in a common space 25 on, respectively, two supporting blocks 26 of the two reciprocating mechanisms 7a, 7b running parallel to the wide side walls 31 moreover, lying inside the narrow side walls of both molds are placed directly next to each other. Such a dense placement method requires fundamentally different forms of execution of these narrow side walls 32, 33 in each of both molds. Both narrow side walls 33 located inside, of which only the narrow side wall of one mold are shown, are positioned motionless in their position, and, if necessary, tapering is possible. Both external narrow side walls 32, of which only the narrow side wall of one mold are also shown, are connected with mechanisms 35 for moving narrow sides and allow you to set different values of the width of the workpiece and, if necessary, adjust the taper. Placing two crystallizers 5a, 5b directly next to each other for simultaneously casting two billets 6a, 6b provides a very compact design of the subsequent units for drawing the billets and, as a whole, a continuous casting unit with a minimum installation width.

Each of the four support blocks 26 (Figure 2) has a number of centering devices 36 and quick disconnect devices for supplying a working medium 37 (for a cooler, for power supply, etc.), which are made as well-known detachable connections (not shown in detail) ), which interact with the counterparts on the appropriate mold used or the molds used, and thus provide a quick and tight connection when placed directly in the crystal mash on the support blocks 26. These devices quick coupling and centering devices correspond to the support surfaces on each support block and the cooperating support surfaces in crystallizers.

Each reciprocating mechanism 7, 7a, 7b includes a support frame 39, which is detachably fixed to the console in the installation support base 40. A drive mechanism 41 is fixed to the supporting frame 39, by which a predetermined reciprocating movement is communicated to the support block 26. In order to stabilize the support block 26 in the carrier frame 39, it is connected to the guide elements 42, which are formed by flat springs.

Accordingly, two mechanisms 7a, 7b or 7c, 7d, which are jointly provided for supporting and reciprocating, respectively, of the mold 5a, 5b for casting a narrower workpiece, are connected to a hydraulic control unit 44 (Fig. 5a), which provides a synchronous reciprocating - translational movement of both interacting support blocks 26a, 26b or 26c, 26d. Both control units 44 are controlled from the central computing unit 45 individually and in accordance with the casting conditions of the respective workpiece. When using one mold 5 for casting a wide billet, all four reciprocating mechanisms 7a, 7b, 7c, 7d work together (Fig. 5b), and the corresponding hydraulic control units 44 are connected via data lines to a synchronization device 46, which is formed by central computing unit 45.

Figure 6 shows a distribution ladle 3, placed in the casting position above the mold 5 for casting a separate wide billet 6. The molten steel 48, which is introduced into the distribution ladle 3 through a protective pipe not shown in the drawing, flows through the outlet 49 in the bottom of the distribution the bucket 3 and through the immersion casting pipe 4 into the mold cavity 5. The immersion casting pipe 4 or the outlet 49 corresponds to a shutter element 50, which is mounted on the bottom of the distribution bucket. The shutter member 50 consists of a hydraulically or pneumatically actuated gate, by means of which the flow rate of the molten steel is regulated.

In the same way, Fig. 7 shows the same distribution bucket 3 located above two molds 5a, 5b for simultaneously casting two workpieces 6a, 6b in the working position. Each of both crystallizers 6a, 6b corresponds to a submersible casting pipe 4 with a shutter element 50 for controlled supply of molten steel from a common distribution ladle 3.

To ensure optimal distribution of the melt in the inner volume of the mold of each mold 5, 5a, 5b, as well as to meet the requirements of different casting speeds and sections of the workpieces, in particular different values of the width of the workpiece, several outlet openings 49 and their corresponding gate elements 50, which, graphically represented by vertical dash-dotted lines, depict the central axes 51a, 51b, 51c, 51d and 51e of the outlet openings 49. These are central The e-axes 51 a through 51 e of the outlet openings are arranged along a straight line not shown, which lies in the middle plane of the mold. The various outlet openings 49 with a corresponding closure element 50 can, if necessary, be equipped with submersible filling tubes 4 and actuated. For example, for casting a wide billet, molten steel can be introduced into the molds through the central outlet 49 corresponding to the central axis 51 c (FIG. 6), or through two outlet openings corresponding to the central axes 51b and 51d. When two billets 6a, 6b are cast simultaneously, depending on the selected casting width, the outlet openings 49 can be activated in accordance with the central axes 51b and 51d or in accordance with the central axes 51a and 51e. In each case, it is sought to introduce molten steel in the middle of relatively wide side walls and, if possible, in the middle of relatively narrow side walls, and thereby to a large extent with uniform distribution in the mold 5 or in both molds 5a, 5b. Therefore, when changing the mold in the distribution ladle, it is necessary to provide only a submersible filling pipe in accordance with the selected continuous casting mold. All other necessary approvals at the continuous casting plant are carried out exclusively by regulation in accordance with the technological process.

Each cast billet, after being withdrawn from the mold in the bent knot 8 for drawing the billet, deviates from the substantially vertical direction of the casting in the horizontal direction of transportation. Two simultaneously cast billets 6a, 6b, as shown in Figs. 8 and 9, are supported and stretched in the adjacent nodes 8a, 8b for pulling the billets independently of each other.

Each of the independent workpiece pulling units 8a, 8b includes a roller support stand 9a, 9b for the outer arc and a roller support stand 10a, 10b for the inner arc of the continuous casting installation, which essentially consist of a dense set of driven and non-driven rollers.

Preferably, both nodes pulling the workpieces, while maintaining their functional independence, are divided into segments, which include adjacent to each other pulling workpieces. On Fig shows a cross section of a similar segment with driven rollers 12, which form two pairs of rollers and provide for both cast billets 6A, 6b independent from each other, support and pulling. The rollers related to the respective workpieces are connected to the drive mechanisms 53 for setting an individual speed. The rollers of the external arc of both the workpiece pulling units 8a, 8b are supported by a common supporting frame 54 or segmented frame supporting both the workpiece drawing units and form the fixed side of the workpiece drawing unit. The internal arc rollers for both draw units of the blanks 8a, 8b are supported by independent roller holders 55a, 55b and are secured to the common carrier frame 54 or segmented frame via articulated joints 56a, 56b. The independent roller holders 55a, 55b in the carrier frame guides not shown in the drawing can be moved vertically and can be pressed against the respective workpiece between the roller holders 55a, 55b and the carrier frame 57 so that a predetermined torque can be transmitted. The supporting frame 54 of the external arc and the supporting frame 57 of the internal arc by means of lateral clamping devices 59 are mounted in the segment and correspond to the conventional construction of the segment of the workpiece pulling unit.

Figure 9 shows the location directly next to each other of two continuous casting plants in accordance with the invention, in which the overall width of the installation is minimized. At the same time, the other, as with both externally located workpiece pulling units, far-sided drive mechanisms 53 of the driven rollers 12 through the planetary gear 60, the connected angular gear 61 and through the cardan shafts 62 in a raised position in the lateral direction are located above both passing next to each other internally located roller support stands 8b, 8a. Also included in the scope of the invention is the option when only one of the continuous casting plants is made in accordance with the invention.

When casting a wide billet, which in its length along the width passes through both nodes 8a, 8b to pull the billets, as shown in Fig. 10, the drive mechanisms 53a, 53b of the driven rollers 12a, 12b are controlled from the synchronizing device 46 to set the conditions for the same rotation (number revolutions of rollers). Likewise, the compression force of the driven rollers on the workpiece is balanced by equal loading or synchronization of the control units 63 and, thus, of the hydraulic cylinders 58a, 58b by means of a synchronizing device 46 or a central computing unit. The hydraulic cylinder 58a acts between the roller holder 55a and the common bearing frame 57, and the hydraulic cylinder 58b acts between the roller holder 55b and the common bearing frame 57 and thus enables the individual installation of, in particular, driven rollers on the workpiece.

In the nodes for drawing the blanks 8, 8a, 8b, the blank is continuously cooled, still liquid in the core zone, to the temperature of the blank, which provides continuous solidification and cutting of the blank. In particular, in the first segments of the workpiece drawing unit, especially in the bending zone, particular importance is attached to the cooling of the workpiece. Figure 11 shows the location of the nozzles for cooling the workpiece, consistent with the casting of a wide workpiece, and Figure 12 for cooling, consistent with the casting of two, narrower than the workpieces.

Along the unit for pulling the workpiece in several rows extending along the casting direction, preferably in five rows, as shown in the drawing, nozzles 65a, 65b, 65c, 65d, 65e are arranged, which can be loaded either individually or in groups. When casting one workpiece 6 of maximum width, all five nozzles or rows of nozzles are used (Fig. 11) and provide uniform loading of the workpiece surface by the cooler across the casting direction or the workpiece moving direction. When casting two blanks 6a, 6b of the maximum possible width, both external nozzles 65a, 65b and 65d, 65e, respectively, work, and the middle nozzle 65c is turned off (Fig. 12). Only the left or right blank 6a or 6b may also be cast. Accordingly, only both nozzles corresponding to this workpiece can be activated. Thus, coordination with any possible mode of operation is possible.

In the outlet zone of the continuous casting installation according to the invention, there are two output roller tables 15a, 15b, on which, after exiting the workpiece cutting device, either one wide slab is moved, which rests on both output rollers 115a, 15b together, or two narrower compared to him a slab, to each of which there corresponds a corresponding live roll. On Fig shows the situation of the transverse transportation of a wide slab, and on Fig - situation of the transverse transportation of two narrower compared to it slabs.

In the horizontal outlet zone of the continuous casting installation, both output roller tables 15a, 15b are made in the usual way in the area of operation of the two cutting devices 16a, 16b as fire cutting rollers 22a, 22b. Both made as fire cutting installations of the workpiece cutting device are placed in the direction of movement of the workpieces, indicated by the arrow, one after another at a distance that is sufficient to be able to cut one of the two workpieces to be measured into measured pieces at the maximum casting width. Each of the blank cutting devices 16a, 16b refers to a live roll of the fire table 22a, 22b, and thereby one of the two blanks. When manufacturing only one wide workpiece, which is located on both live rolls at a time, which is not shown here, transverse cutting is performed using only one of both workpiece cutting devices, while the second workpiece cutting device is in the standby position.

Both devices 16A, 16b cutting blanks are made in an identical manner. They consist, respectively, of the gantry crane 81, which is moved along the side crane tracks 80a, 80b, in parallel with the direction of movement of the workpieces, which overlaps both fire table rolling tables 22a, 22b. On the transverse holder 82 of the gantry crane 81 on the horizontal guides 83, two separating elements 17 are arranged to move. The separating elements 17 of the workpiece cutting device can be used for transverse cutting of both a wide workpiece and one of two workpieces narrower compared to it.

As shown in FIG. 14, a wide slab is located in the positioning zone of the output roller tables, in which a lateral conveying device 19 is located, which comprises two colliding hooks 70 and two movement actuators 71, and which moves the slab from position A on the output roller tables 15a, 15b in position B on the subsequent conveyor conveyor 72a. On this transporting conveyor, the slab is removed from the installation area and fed to after-treatment devices not shown or to the storage position.

On Fig, it is shown, on each of the roller tables, a narrow slab in the area of the outlet of the output roller tables 15a, 15b, where both slabs are displaced by means of lateral transport devices 19a, 19b in diverging directions of the outlet on the output roller tables 72a or 72b. This is accomplished by moving actuators 71a, 71b and colliding hooks 70a, 70b from positions A, A 'on the output roller tables 15a, 15b at position B, B' on the respective transport conveyor tables 72a or 72b related thereto.

In order to start the continuous casting process, individual molds for casting a wide billet or both molds for casting two workpieces narrower compared to it from the output side of their inner volume of the mold should be closed by means of a seed, which is usually introduced along the bottom of the billet pulling unit into the mold.

As shown in FIG. 16, a seed head 75, which is pivotally coupled to two seeds 21 a, 21 b, is inserted into the mold cavity of the mold 5 for casting a wide preform and closes it from the exit side. The driven rollers 12a, 12b of both draw units 8a, 8b, which are shown by dash-dotted lines, interact with both seeds 21a, 21b with synchronous control from the synchronization device 46 and thereby prevent the seeds from distorting during movement in both draw units.

On Fig shows the situation when the joint or separate start of the casting of two workpieces of smaller width: the seed closes through the head of the seed 75A the output end of the mold 5a, and in the same way, the seed closes through the head of the seed 75b the output end of the mold 5b. The seed 21a corresponds to the blank drawing unit 8a and is individually moved by means of the driven roller 12a to the blank drawing unit. Independently of this, the seed 21b can be moved by means of the driven roller 12b into the workpiece draw unit 8b. Thus, it is possible to start casting of each individual billet in time independently of the other.

Claims (20)

1. Installation of continuous casting, designed for casting one wide billet (6) or two narrow billets compared to it (6a, 6b), containing at least one distribution bucket (3), and made with the possibility of placement in space ( 25) the head part of the installation of one mold (5) or two molds (5a, 5b) with the possibility of replacement, and is equipped with one or two mechanisms (7a, 7b) of the reciprocating motion of the molds and two nodes (8a, 8b) for pulling the workpieces with appropriate drive mechanics zmami (41), providing separate and simultaneous actuation mechanisms (7a, 7b) of reciprocating motion and knots (8a, 8b) stretching the preforms. 2. Installation according to claim 1, in which each of the two mechanisms (7a, 7b) of the reciprocating movement contains a drive mechanism (41) for generating a reciprocating movement associated with a synchronizing device (46) for setting the conditions of the synchronous mode of reciprocating translational motion. 3. Installation according to claim 2, in which the synchronizing device (46) for setting the conditions of the synchronous mode of reciprocating motion is made in the form of a central computing unit (45). 4. Installation according to any one of claims 1 to 3, in which each reciprocating mechanism (7a, 7b) includes a hydraulic actuator (41) and a control unit (44), which is connected via signal lines to a computing unit ( 45). 5. Installation according to any one of claims 1 to 3, in which each reciprocating mechanism (7a, 7b) includes a support block (26, 26a, 26b, 26c, 26d) for supporting the mold (5, 5a, 5b ), and on the supporting surface of each supporting block and the corresponding opposite supporting surface on the mold there are devices (37) for quick-connect for supplying a working medium and at least one centering device (36). 6. Installation according to claim 1, in which at least one manipulator (27) is placed on the casting platform (29) to replace the molds, preferably a transfer trolley (28). 7. Installation according to claim 1, in which two parallel passing nodes (8a, 8b) for pulling the blanks include roller support stands (9a, 9b, 10a, 10b) with driven (12, 12a, 12b) rollers and irreducible rollers ( 11), and the driven rollers are connected with the drive mechanisms (53), and the drive mechanisms of the rollers of both roller support stands (9a, 9b, 10a, 10b) are connected with a synchronizing device (46) for setting the conditions for synchronous rotation of the driven rollers (12, 12a, 12b). 8. Installation according to claim 7, in which the synchronizing device (46) for setting the conditions for synchronous rotation of the driven rollers in the workpiece pulling unit is formed by a central computing unit (45). 9. Installation according to any one of claims 7 or 8, in which the interacting rollers (11, 12, 12a, 12b) or the pairs of rollers of both roller support stands (9a, 9b, 10a, 10b) interacting during casting of a wide workpiece are supported by a common carrier frame (54) or segmented frames. 10. Installation according to claim 9, in which pairs of rollers or rollers of a group of pairs of rollers are made with the possibility of relative movement in each of both roller supporting stands (9a, 9b) and are mounted on independent roller holders (55a, 55b), which are based on a common support frame (57) or segmented frame. 11. Installation according to claim 7, in which each drive mechanism (53) of the driven roller (12a, 12b) is connected to it through a cardan shaft (62) and placed laterally outside of both adjacent roller support stands (9a, 9b) , 10a, 10b) of the nodes (8a, 8b) for drawing the blanks. 12. Installation according to claim 11, in which, when at least two continuous casting plants are placed side by side and with nodes (8a, 8b) placed in pairs next to each other, drawing at least two continuous casting plants lying with the inner side of the drive rollers (12b, 12a), connected through a planetary gear (60) and an angular gear (61) with the drive mechanism (53), and the drive device in a raised position are placed on the side above the two adjacent rolling support stands of the nodes ( 8a, 8b) pulling the bar wok. 13. Installation according to claim 1, in which each node (8A, 8b) for pulling the workpiece corresponds to an independent device (16a, 16b) for cutting the workpiece for transverse cutting of one of two parallel casting narrower workpieces (6a, 6b), and each of these The workpiece cutting device comprises at least one spacer element (17), preferably a fire cutting unit. 14. Installation according to item 13, in which the device (16A, 16b) for cutting workpieces, overlapping both nodes (8a, 8b) for pulling the workpieces or live rolls (22a, 22b) of fire cutting, are placed one after the other in the feed direction of the workpiece. 15. Installation according to item 13, in which at least one of both devices (16A, 16b) for cutting workpieces is equipped for transverse cutting of a wide workpiece (6) with two interacting separation elements (17). 16. Installation according to claim 1, in which after nodes (8a, 8b) for pulling the blanks and devices (16) for cutting the blanks, output roller tables (15a, 15b) are placed, to which the lateral movement device (19, 19a, 19b) is attached for a changing direction transportation of cut billets (slabs), diverted across the direction of supply of the workpiece. 17. Installation according to claim 1, in which the distribution bucket (3) is made with several outlet holes (49) arranged in a row for molten metal, to which the locking elements (50) correspond, wherein said locking elements are connected via signal lines to the central computing block (45) and made with the possibility of activation depending on the cross-sectional format of the molds located downstream (5, 5a, 5b). 18. Installation according to claim 1, in which to start casting two seeds (21a, 21b) are introduced through the unit (8a, 8b) for pulling the workpiece into the molds (5, 5a, 5b), moreover, when using two molds (5a, 5b) the seeds are equipped with separate heads (75a, 75b), and when using one mold (5), they have a common head (75). 19. A method for casting one wide billet or two narrow billets compared to it in one continuous casting unit, wherein at least a partially solidified billet is formed in one mold, which is supported and output by means of a subsequent unit for drawing the billet, the casting parameters for castings of each billet, both when casting one billet and when parallel casting two billets, are individually set and adjusted, characterized in that for casting one wide billet in For continuous casting, one mold is used, which is mounted on at least two synchronously controlled reciprocating mechanisms, while the cast billet is supported and pulled by two synchronously operating units for drawing the billet, and for simultaneous casting of two narrow billets, in a continuous installation castings use two molds independent of each other, each of which is installed, respectively, on at least one reciprocating mechanism motion ceiling elements operating independently of the other mechanism the reciprocating movement, wherein the strand are supported and stretched by drawing preforms nodes managed separately from each other. 20. The method according to claim 19, characterized in that individually set and adjust at least one parameter of the reciprocating motion of the mold for each individual workpiece and the casting speed of each individual workpiece.

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