CZ279030B6 - Crystallizer for continuous casting of solidifying materials, particularly of steel in slabs - Google Patents

Abstract

The crystallizer applied for continuous casting, for casting a steel into the slaps especially, enabling to preset profile thickness, is located in the body of the casting device and it is created by the movable walls, segments (20), as for instance, at least one pair of endless belts (10) containing segments and located opposite, the segments of which are created based on the hollow and cooled parts (21) creating space between belts and this space is of slap shape. The end less belts with segments (10) are fixed to the closed carrying frame (11), via carrying consoles (12) and they are equipped with individual drives (17), while these drives are synchronised to each other and they are closed to the driving shafts (13), they also are equipped with the sealing pressure of contact walls (25) closed to the segments (20), and this pressure is created based on the breaks (15) on the lower shafts (14) and holes (53) with a longitudinal deviation having a tolerance on the carriers (51) closed to connecting the clappers (5) of rear walls (27) of segments (20). The side walls (23) are used for preset of the slap wide and they are created in a wide overhanging a maximal wide of the slap thickness and the side walls (22) are created in the length which corresponds to the constant wide of the slap, with the side sealing contact on the front active surfaces (26) closed to segments of the opposite belt (10). The shifter enabling to change the distance of axis and the pressure of belts (10) consists of at least two excenters (16) located between the pairs of the driving lower driven shafts (13, 14), movable in their bearings in the axial direction.

Description

Area: techniques

BACKGROUND OF THE INVENTION The present invention relates to a crystallizer for the continuous casting of solidifying materials, in particular steel, into slabs with the possibility of adjusting the slab width, and solves the complete mechanization, variability and reliability of continuous casting steeles. or alloys, including plastics.

BACKGROUND OF THE INVENTION

Installations for continuous casting of steel into slabs, as a state-of-the-art and highly rational form of production of steel into semi-finished products for further processing, in particular by hot rolling of metal. It encounters problems associated with the high difficulty of pouring liquid metal into slabs at varying widths, times and quality of solidification, rate of withdrawal and separation, all in a short period of time and without disturbing continuity at least during the processing of relatively bulky melting from a single convector. Apart from the technological mastery of melting homogenization, the co-operation of the explicit crystallization and boiling process of steel, the formation of slag and the like, the entrainment of substances itself! Melts in the space of the crystallizer along its walls, which are intensively cooled for heat dissipation, are the most demanding technological and constructional problem. The design and reliability of the crystallizer limits the rationalization of continuous steel casting. Conventional devices for continuous casting of steel, whether with vertical or horizontal separation of the slab after bending the vertically protruding semi-solid material, work on the principle of stable crystallizer with stable vertical walls of highly thermally conductive material mainly medium, on the one hand by permanent pulling of the chain hung on the starting plug of the slab front and on the other by the whole system of pulleys and so called. stepping beams that attach and feed the material according to the rate of metal crystallization observed. In the event of failure of any of these elements of the exhaust section or of the crystallizer itself, all in an inaccessible and focused environment, it is necessary to degrade the respective portion of the heat that has not yet been processed, and eliminating the fault is highly demanding, laborious, long term. The walls of the crystallizer are permanently heat-sealed and cannot be sufficiently cooled due to their thin-walled properties. Furthermore, when the solidifying material is drawn, especially on its inner surfaces in the lower part, they are rapidly and unevenly worn, which results in high consumption of this non-ferrous metal, not to mention the high cost of their production and possible renovation.

In terms of variability, in particular the width of the slab, attempts have been made to create a system of adjustable sidewalls, which further increases the design and control elements, the unevenness of the thermal load on the endwalls and the overlap, which is disproportionate to the effect. Partitioning experiments with vertically movable underparts to the so-called. Telescope in combination with stepping beams failed due to the complexity of construction and control.

-1GB 279030 B6

Attempts have been made to utilize endless link strips or other cell arrangements, for example, by stepping them off at the end of the casting path, to solve continuous casting of different substrates, but mainly with their horizontal arrangement and for small parts or components. plastics and the like. For the vertical withdrawal required for steel casting, as well as for the other technological requirements mentioned above, the belt crystallizers are not developed. Even in the above-mentioned devices with horizontal or stripe horizontal arrangement, only the problems with ensuring the cooling of the cells, by means of systems mentioned e.g. in U.S. Pat. 33507 From the year 1930 with priority of 22.6.1926 (Belgium) or EP 256866 consisting in the arrangement of cooling piping fixedly along the circumference of the track, with its elements opening into the opening space on the moving belt links and alternating or continuous air blowing or cooling spraying water. This only partially suggests a cooling solution, but does not address the above-mentioned requirements, in particular vertical casting of the enclosure.

SUMMARY OF THE INVENTION It is an object of the present invention to provide a device and technology for continuously casting steel at different and adjustable widths as well as as small slabs as possible so that the solidification material is entrained and led to the separation point from the crystallizer body in its external pulling elements, with high reliability and reliability, cooling effects and variability of the casting parameters, all without disturbing the crystallization technology.

SUMMARY OF THE INVENTION

The above-mentioned drawbacks are substantially eliminated by the crystallizer casting of solidification adjustments of the device width in the space below the bearing plugs in vertical walls for materials, mainly steel slabs, slabs, placed in the body through a casting hole. one pair of opposed continuous infinitely continuous casting consists of a starter whose webs of continuous webs are formed by hollow chilled side wall panels, each of which consists of a continuous web attached by means of a bracket in a closed nostril of the crystallizer Separately synchronized drive of the upper drive shaft for movement in the direction of the slab outlet, the brake on the lower drive shaft and the coolant distribution mounted on a separate pin with drive of the timing node, equipped with flexible connecting hoses for each of the wall members, each wall member comprising a hollow chilled panel and a front face and a side wall with a side face, the side walls being mirrored at the opposing link belt, the crystallizer further comprising a hinged bottom of the starter mechanism and a longitudinal offset of the endless belts, which is formed by two eccentrics located between the upper drive. the starting moment of the pre-hardening material from level D is synchronized with the moment the crystallizer cross-section is filled to level H with the moment of closing the plug by the hinged arms controlled by the transfer device with combined movement of point B in vertical and horizontal direction.

-2GB 279030 B6

The crystallizer according to the present invention has the advantages in that the complete mechanization, the variability and the reliability of the steel continuous casting equipment, in particular the vertical withdrawal, changing its direction, changing the range of slabs or strips and the possibility of casting non-ferrous metals, alloys or more. plastics. All the above mentioned disadvantages of the system of stable crystallisers are eliminated and all functional parameters for the use of band crystallisers in steel technology, such as the possibility of using less demanding materials on hollow sections of cells, synchronization of two opposing belt drives together with continuous cooling system, mechanization are suitable. start of casting, pressure sealing of the cell ends and especially mutual adjustment of individual strips to each other in order to adjust the dimensions of the inter-band space and thus the casting slab through the start of melting but also during operation.

The arrangement of the one-dimensional walls of the inter-band space with the overlap of the cell front walls allows adjustment of the slab width by using simple eccentrics for mutual shifting of the shafts of the individual belts.

An overview of the figures in the drawing

The crystallizer of the present invention will be illustrated by way of example with reference to the accompanying drawings, in which: FIG. 1 shows a general view of the assembly of the belts and the construction of the active elements in cross-section, showing the casting spaces in the starting position, [0029] FIG. 2 is a front view of a cooling manifold disposed on one face of the crystallizer; FIG. 3 is a longitudinal sectional view of the layout of the cooling manifolds and the placement of the elements of one of the belts; FIG. 4 is a plan view of the location and relative position of the belt members during melting, including the design of the chain link structure of the shaft rosettes, and the detail of the link pressure seal of FIG. 7, FIGS. 5 and 6 are views of the crystallizer in the installed state, with the drives and shifters indicated on the opposite control side of the crystallizer, and finally FIG. 8 is a perspective view of the crystallizer.

DETAILED DESCRIPTION OF THE INVENTION

On the casting device body 70, the crystallizer is fixed and positioned coaxially with respect to the pouring opening 73 of the funnel.

72, wherein between the wall members 20 of the individual endless link strips 10, a filling and pre-hardening space 63 is formed arranged vertically from the funnel 72 to the exit level 62 of the slab 80. The exit direction 61 of the slab 80 can still be vertical. from the space profile

73 by adjusting the conicity and height of the wall members 20 of the individual link strips 10 and their sealing and guiding elements.

Two carrier brackets 12 for each of the belts 10 are mounted on the closed support frame 11, on which both the upper drive shafts 13 and the lower driven shafts 14 are provided with bottom springs 18 with sides corresponding to the effective height of the wall members 20. the upper drive shaft 13 is provided with a drive 17 and the lower driven shaft 14 is provided with a brake

-3GB 279030 B6

15. On either side of each of the support brackets 12 are disposed two rows of guide rollers 54 disposed between three rows of carriers 51 with chain link pins 52, of which the outer rows are located at the edges of the molded rosettes 18. To increase efficiency, brake pressure 15, longitudinal oval openings 53 are formed on the carriers 51, and also the rear walls 27 of the wall members 20 are provided with bridging springs 55.

The wall member 20 consists of a hollow chilled panel 21 which comprises a front wall 23 with a front face 26 formed in a width S exceeding the necessary maximum width of the slab 80, a rear wall 27 and a sealing wall 25 and side walls 22 with a side face 24. V corresponds to slab width 80.

In each wall member 20 of the two link strips 10, through the side wall 22 into the cavities of the cooling element 21, the inlet ducts 34 overlapping into the distal part of the cavity and the drainage ducts 35 of the cooling medium are connected to the respective chambers. a rotatable coolant inlet and outlet node 32 which is rotatably mounted on a pin 37 and rotated by a drive 36 synchronized with a drive 17 of the link belts 10.

At the lower level of the crystallizer on the wall of the support frame 11, the starter mechanism is provided with an actuator 43 and a retractable tilting bottom 42 reaching the end thereof after the starter plug 41 at the level 62 of the slab exit 80.

The displacers 16 of the relative links of the articulated strips 10 are located on the control side remote from the cooling manifolds 30 in front of the drives 17 and the brakes 15 and consist of yard eccentrics 90 with articulated horizontal displacement control of the shafts 13 and 14 of the articulated strips 10 upstream of the bearings 19.

The handling of the device consists in that the crystallizer, after being assembled and tested in the workshop, is installed on the casting device body 70 and the respective dimensions of the drawbar and the position of the individual parts are adjusted, in particular by means of the shifter 16, aligning the starter plug 41 and retracting Gradually, after pouring the metal and according to its state of cooling, the drives 17 of the link belts 10 are lowered in parallel with the drives 36 of the cooling manifold 30 and the tilting bottom 42 of the starter mechanism 40 is gradually displaced. casting device outside the crystallizer. The interband space between the front surfaces 26 and the side surfaces 24 of the wall members 20 corresponding to the dimensions of the cast slab 80 is adjusted and optionally changed either before re-melting or during casting as desired and desired range of slab widths 80 by moving both eccentric shifters 16 to reach the desired The slab pressure of the slab 80 .. The constant contact pressure of the contact walls 25 of the wall elements 20 relative to each other is provided by the back pressure during their downward movement, i.e. in the casting operation caused by the torque on the drive shaft 13 and by the permanent engagement of the brakes 15 on the lower known shafts 14, while on the distal path of the wall members 20 upwards they are pulled to the extent of clearance in the holes 53 of their carriers 51.

Claims (1)

Crystallizer for the continuous casting of solidification materials, in particular slabs steel, with the possibility of adjusting the slab width, located in the casting body in the space below the casting opening, consisting of a support frame, vertical slabs shaping slabs and a starter plug the vertical walls are formed by one pair of opposing endless link strips, the individual links being formed by hollow chilled side wall panels, characterized in that each endless link belt (10) attached by means of a bracket (12) in the closed crystallizer support frame (11) comprises separate a mutually synchronized drive (17) of the upper drive shaft (13) for movement in the direction of exit of the slab (80), a brake (15) on the lower drive shaft (14) and a coolant pressure distribution (30) mounted on a separate pin (37) ) with a drive (36) of the rotary timing node (32) provided with flexible connecting hoses (33) for each of the wall members (20), each wall member (20) consisting of a hollow cooled member (21) with a front active surface (26) and a side wall (22) with a side active surface (24), wherein the side wall (22) is mirrored at the opposed link waist (10) and the further crystallizer comprises a hinged bottom (42) of the starter mechanism (40) and a displacement (16) of the longitudinal offset of the endless link strips (10) formed (90) located between the upper drive shafts (13) and the lower drive shafts (14), wherein the starting torque of the pre-hardening material (80) from level D is synchronized with the crystallizer cross-section (63) being filled to level (H) and (41) operated by a collapsible arm (42) operated by a combination movement device (43).