CN211803735U - Continuous casting machine for producing special-shaped blank - Google Patents

Continuous casting machine for producing special-shaped blank Download PDF

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Publication number
CN211803735U
CN211803735U CN202020289024.4U CN202020289024U CN211803735U CN 211803735 U CN211803735 U CN 211803735U CN 202020289024 U CN202020289024 U CN 202020289024U CN 211803735 U CN211803735 U CN 211803735U
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blank
sector
machine
continuous casting
crystallizer
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王颖
高仲
陈杰
陈卫强
代宗岭
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Capital Engineering & Research Inc Ltd
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Capital Engineering & Research Inc Ltd
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Abstract

The utility model provides a conticaster of production profile blank, the conticaster of production profile blank includes: a ladle turret provided with a ladle; the tundish is arranged below the ladle turret, and an inlet at the upper end of the tundish is connected with an outlet of the ladle; the crystallizer component is arranged below the intermediate tank, and an inlet at the upper end of the crystallizer component is connected with an outlet at the lower end of the intermediate tank; the fan-shaped section extends along the vertical direction and is arranged below the crystallizer component, and the upper end of the fan-shaped section is connected with the outlet at the lower end of the crystallizer component; the withdrawal and straightening machine is arranged along the vertical direction and is positioned below the sector section; the fire cutting machine and the oblique blank discharging system are arranged below the withdrawal and straightening machine. The device is vertically arranged, and the fan-shaped sections are arranged in the vertical direction, so that the casting blank is not bent or straightened, cracks caused by external force on the casting blank are reduced, and cracks on the surface of the casting blank caused by water accumulation of the inner arc when the straight arc-shaped or full arc-shaped continuous casting machine casts special-shaped blanks are reduced.

Description

Continuous casting machine for producing special-shaped blank
Technical Field
The utility model relates to a ferrous metallurgy trade continuous casting equipment technical field, concretely relates to conticaster of production profile blank.
Background
The special-shaped blank crystallizer is different from a common plate blank and a square blank crystallizer which only have four surfaces and four corners, the special-shaped blank crystallizer has twelve surfaces and twelve corners, and the cooling uniformity is difficult to ensure due to the complicated shape. In the processes of cooling and secondary cooling of the crystallizer, heat transfer of each part on the cross section is uneven, so that the stress of a casting blank is concentrated, and various casting blank quality defects such as surface longitudinal cracking, flange end internal cracking and the like are easy to occur. The conventional beam blank is cast by a full-arc continuous casting machine, and the maximum section is 1024mm by 390mm by 120mm, namely the weight per meter is 1.4 t/m. For the requirement of producing ultra-large-sized special-shaped blanks with the weight per meter more than 2.0t/m, the corresponding matched pouring section size is 1200mm x 500mm x 120mm at most. Chinese patent publication No. CN107552750 describes a multi-strand continuous casting machine and a method for producing an extra-large cross-section beam blank or slab, which uses a full arc continuous casting machine to produce the extra-large cross-section beam blank, and reduces the bending stress applied to the blank in the production process compared with the conventional straight arc continuous casting machine, but does not improve the straightening stress condition of the blank, and the beam blank having strong crack sensitivity is still easy to produce the blank crack in the beam blank steel under the action of thermal stress and straightening stress. The method described in this patent has a further disadvantage: because the casting blank has a large section, the casting machine has low drawing speed and low surface temperature of the casting blank, the surface temperature of the arc-shaped blank head cast by the full-arc-shaped special-shaped blank crystallizer is lower, the counterforce required for straightening the blank head is also huge, when the blank head passes through the first two withdrawal straightening machines, straightening is not realized, the cast blank head which is not straightened collides with the third withdrawal straightening machine and the fourth withdrawal straightening machine, and the withdrawal straightening machines can be damaged in serious cases. The mild case affects the production, and the severe case causes the stop of watering. Moreover, because of the characteristics of low web plate and high flange of the beam blank, water can be naturally accumulated in the inner arc of the beam blank during the production of the straight arc type or full arc type continuous casting machine, and even if a secondary cooling water blowing device is adopted, the surface cracks of the casting blank can still be caused by the water accumulation for the steel grade sensitive to the cracks.
In conclusion, the defects of the prior production of the super-large section beam blank are as follows:
1. by adopting the traditional full-arc continuous casting machine or straight-arc continuous casting machine, the beam blank is subjected to straightening stress and even bending stress besides thermal stress, and the beam blank steel grade with strong crack sensitivity is difficult to realize under the superposition of the stress.
2. Due to the shape characteristics of the special-shaped blank, when the straight arc type continuous casting or full arc type special-shaped blank continuous casting machine is used for producing, water is accumulated in the inner arc of the special-shaped blank, so that the casting blank is cooled unevenly, and the generation of cracks on the surface of the casting blank of the crack sensitive steel type is aggravated.
3. Because the cast casting blank has a large section, the casting machine has low pulling speed and the casting blank has low surface temperature, the tension leveler cannot straighten the arc casting blank head cast by the full arc crystallizer, the head of the casting blank rushes against the tension leveler, the production is influenced by a light person, and the casting is stopped by a heavy person.
SUMMERY OF THE UTILITY MODEL
The utility model provides a conticaster of production profile blank to reach the purpose that improves the casting blank quality.
The utility model provides a technical scheme that its technical problem adopted is: a continuous caster for producing preforms comprising: a ladle turret provided with a ladle; the tundish is arranged below the ladle turret, and an inlet at the upper end of the tundish is connected with an outlet of the ladle; the crystallizer component is arranged below the intermediate tank, and an inlet at the upper end of the crystallizer component is connected with an outlet at the lower end of the intermediate tank; the fan-shaped section extends along the vertical direction and is arranged below the crystallizer component, and the upper end of the fan-shaped section is connected with the outlet at the lower end of the crystallizer component; the withdrawal and straightening machine is arranged along the vertical direction and is positioned below the sector section; the fire cutting machine and the oblique blank discharging system are arranged below the withdrawal and straightening machine.
Furthermore, the crystallizer component comprises a crystallizer and a crystallizer vibration device, the crystallizer is connected with an outlet at the lower end of the intermediate tank, and the crystallizer vibration device is connected with the side wall of the crystallizer.
Furthermore, the crystallizer has broad face and narrow face, and the narrow face is straight plate-like structure, and the broad face is convex structure, and the broad face is provided with the cooling water hole.
Further, the fan-shaped section has set gradually first fan-shaped section, second fan-shaped section and third fan-shaped section along vertical downward direction, and the axis of first fan-shaped section, the axis of second fan-shaped section and the axis collineation of third fan-shaped section.
Furthermore, the first sector section is provided with the close-packed centre gripping that the octahedral supported, the second sector section is provided with the close-packed centre gripping that the four sides supported, and the third sector section is provided with the close-packed centre gripping that the two sides supported.
Furthermore, the same side of the sector section and the withdrawal and straightening machine is provided with a withdrawal and straightening machine and a sector section replacing device.
Further, the continuous casting machine for producing the beam blank further comprises: the dummy ingot removing device is arranged between the withdrawal and straightening machine and the flame cutting machine and is used for separating a dummy bar from a casting blank; and the dummy bar storage device is arranged at one side of the dummy bar removing device and is used for storing the dummy bar.
Further, the oblique blank discharging system comprises: the oblique blank discharging slideway is obliquely arranged in the horizontal direction, and the lower end of the oblique blank discharging slideway is arranged below the flame cutting machine; the blank receiving trolley is arranged on the inclined blank outlet slide way in a sliding manner and can bear the casting blank cut by the flame cutting machine; the casting blank pinch roll and the ejection roller way are arranged along the horizontal direction and are connected with the upper end of the oblique ejection slideway.
The beneficial effects of the utility model are that, the utility model discloses an integrated device is vertical arranging, and set up fan-shaped section along vertical direction, can make the casting blank neither receive the bending, also not receive the aligning, thereby reduce the casting blank because of receiving the crackle that this external force produced, but also can reduce the casting blank surface crack that interior arc ponding leads to when straight arc or full arc conticaster casting special-shaped blank, reach the purpose that improves the casting blank quality, consequently this embodiment can produce super large section special-shaped blank, can be fit for producing the sensitive steel grade of crackle again, can also avoid opening the production problem that the first perk of casting blank collides the withdrawal and straightening machine and brings.
Drawings
The accompanying drawings, which form a part of the present application, are included to provide a further understanding of the invention, and are incorporated in and constitute a part of this specification, illustrate embodiments of the invention and together with the description serve to explain the invention and not to limit the invention. In the drawings:
fig. 1 is a schematic structural diagram of an embodiment of the present invention;
FIG. 2 is a schematic view of a close-packed clamp configuration in the first segment;
FIG. 3 is a schematic view of a close-packed clamp in the second segment;
FIG. 4 is a schematic view of a close-packed clamping configuration in the third segment.
Reference numbers in the figures: 1. a ladle; 2. a ladle turret; 3. an intermediate tank; 4. a crystallizer; 5. a crystallizer vibration device; 6. a first sector segment; 7. a second sector segment; 8. a withdrawal and straightening machine and a sector section replacing device; 9. a withdrawal and straightening machine; 10. a dummy ingot removing device; 11. a dummy bar storage device; 12. cutting the machine with fire; 13. an oblique blank discharging system; 14. a casting blank pinch roll; 15. a knockout roller bed; 16. a third sector segment.
Detailed Description
It should be noted that the embodiments and features of the embodiments in the present application may be combined with each other without conflict. The present invention will be described in detail below with reference to the accompanying drawings in conjunction with embodiments.
As shown in fig. 1, the embodiment of the present invention provides a continuous casting machine for producing a special-shaped blank, which comprises a ladle turret 2, a tundish 3, a crystallizer component, a sector, a withdrawal and straightening unit 9, a flame cutting unit 12 and an inclined blank discharging system 13. The ladle turret 2 is provided with a ladle 1. The intermediate tank 3 is arranged below the ladle turret 2, and an inlet at the upper end of the intermediate tank 3 is connected with an outlet of the ladle 1. The crystallizer component is arranged below the intermediate tank 3, and an inlet at the upper end of the crystallizer component is connected with an outlet at the lower end of the intermediate tank 3. The fan-shaped section extends along the vertical direction and is arranged below the crystallizer component, and the upper end of the fan-shaped section is connected with the outlet at the lower end of the crystallizer component. The withdrawal and straightening unit 9 is arranged in the vertical direction and is located below the segment. And the fire cutting machine 12 and the inclined blank discharging system 13 are arranged below the withdrawal and straightening unit 9.
The embodiment of the utility model provides a whole device is vertical arranging, and sets up fan-shaped section along vertical direction, can make the casting blank neither receive the bending, also not receive the aligning to reduce the casting blank because of receiving the crackle that this external force produced, still reducible casting blank surface crack that interior arc ponding leads to when straight arc or full arc conticaster casting special-shaped blank, reach the purpose that improves the casting blank quality. Therefore, the method can be used for producing the extra-large-section special-shaped blank, is suitable for producing crack sensitive steel grades, and can avoid the production problem caused by the head raising and collision of the cast blank head on the withdrawal straightening machine. In addition, the market of the special-shaped blank is relatively small, so that more small-sized casting blanks are produced, and the market demand of large-sized casting blanks is reduced, so that no vertical continuous casting machine with an oversized special-shaped blank section exists at present.
The crystallizer subassembly includes crystallizer 4 and crystallizer vibrating device 5, and crystallizer 4 and the lower extreme exit linkage of intermediate tank 3, crystallizer 4 have broadside and leptoprosopy, and the leptoprosopy is straight plate column structure, and the broadside is convex structure, and the broadside is provided with the cooling water hole. The crystallizer 4 has the advantages of maintaining the high cooling efficiency of the crystallizer water hole and realizing the easy processing property of the crystallizer water hole.
Further, a mold oscillating device 5 is connected to the side wall of the mold 4. The crystallizer vibration device 5 is full-plate spring hydraulic vibration, and the crystallizer vibration device 5 has the advantages that the online replacement of a vibration formula can be realized, and non-sinusoidal vibration modes and the like can be realized.
As shown in fig. 2 to 4, the sector is provided with a first sector 6, a second sector 7 and a third sector 16 in sequence in a vertically downward direction, and the axis of the first sector 6, the axis of the second sector 7 and the axis of the third sector 16 are collinear. This embodiment has the advantage of being convenient to center as compared to the arcuate segment.
Furthermore, the first segment 6 is provided with close-packed clamping of octahedral support, so that the inner sides of flanges, narrow surfaces and webs of the special-shaped blank can be prevented from bulging. The second sector section 7 is provided with close-packed clamping supported by four sides, so that narrow surfaces and webs of the special-shaped blank can be prevented from bulging. The third sector-shaped section 16 is provided with a close-packed clamping with two-side support, so that bulging of the profiled blank web can be prevented.
In the embodiment of the utility model, fan-shaped section is provided with the same side of drawing and straightening machine 9 and draws and straighten machine and fan-shaped section change device 8. The tension leveler 9 is an independent frame, the tension leveler and the fan-shaped section replacing device 8 can realize the hoisting and maintenance of the tension leveler 9, and meanwhile, the rollers of the tension leveler 9 can adopt annular inner cold rollers so as to achieve the purpose of improving the cooling effect.
Preferably, the continuous casting machine for producing the parisons further comprises a dummy bar removing device 10 and a dummy bar storing device 11. The dummy bar removing device 10 is arranged between the withdrawal and straightening machine 9 and the flame cutting machine 12, and the dummy bar removing device 10 is used for removing a dummy bar from a casting blank. The dummy bar storage device 11 is provided at one side of the dummy bar removing device 10 and stores a dummy bar. The embodiment of the utility model provides an in dummy bar strorage device 11 utilizes the hoist engine to retrieve the dummy bar to next casting machine is opened to water and is sent into crystallizer 4 through the 9 centre grippings of withdrawal and straightening machine.
As shown in fig. 1, the oblique blank discharging system 13 comprises an oblique blank discharging slideway, a blank receiving trolley, a casting blank pinch roll 14 and a blank discharging roller way 15. The oblique blank discharging slideway is obliquely arranged in the horizontal direction, and the lower end of the oblique blank discharging slideway is arranged below the flame cutting machine 12; the blank receiving trolley is arranged on the oblique blank outlet slide way in a sliding manner and can bear the casting blank cut by the fire cutting machine 12; and the casting blank pinch roll 14 and the ejection roller table 15 are arranged along the horizontal direction and are connected with the upper end of the oblique ejection slide way.
When the casting blank starts to be cut, the blank receiving trolley in the inclined blank discharging system 13 can automatically receive the blank head of the fixed-length casting blank, so that the fixed-length casting blank is prevented from sliding off. After the fixed-size casting blank is cut, the blank receiving trolley is driven by the winch to be lifted above the ground together with the casting blank, and the casting blank is output through the casting blank pinch roll 14 and the blank discharging roller table 15.
It should be noted that the position of the cutting torch of the flame cutting machine 12 can be adaptively adjusted according to the shape of the casting blank, so as to ensure that the distance between the cutting torch of the flame cutting machine 12 and the surface of the casting blank of the special-shaped blank is within a proper range, and improve the cutting efficiency.
Further, the embodiment of the utility model provides a be vertical conticaster, can dispose more than two runners. The method has the advantages that the casting blank is not bent or straightened, so that cracks of the casting blank caused by the two external forces are reduced. Meanwhile, the vertical continuous casting machine also reduces water accumulation of the inner arc of the straight arc-shaped or full arc-shaped continuous casting machine for casting the beam blank, thereby reducing the surface cracks of the casting blank caused by uneven cooling of the inner arc of the beam blank. The vertical continuous casting machine does not have the casting blank head because of not having the curved casting blank head, does not have the casting blank nose, has also avoided the problem that the full arc conticaster blank head nose collides the withdrawal and straightening unit. In addition, the arrangement mode of the multiple runners is suitable for the requirements of different casting machines on the yield, and is also favorable for matching with converters with various tonnages.
The embodiment of the utility model provides a maximum section of profile blank that can produce is 1200mm 500mm 120mm, and the single meter is heavy to reach 2.0 t/m. Steel grades include plain carbon steel (e.g., Q235), crack sensitive alloy steel (e.g., weathering steel Q355NH), and the like.
The utility model also provides a production method of special-shaped blank, the conticaster of production special-shaped blank of adoption produces, and production method of special-shaped blank includes following step:
step 10, placing a steel ladle 1 containing molten steel on a steel ladle rotary table 2, and distributing the molten steel into a crystallizer component through a tundish 3;
step 20, starting the withdrawal and straightening machine 9 and the crystallizer assembly to enable the casting blank and the dummy bar to pass through the sector section downwards along the vertical direction for cooling;
step 30, separating the casting blank from the dummy bar and recycling the dummy bar;
and step 40, starting the flame cutting machine to cut the casting blank, and conveying the cut casting blank to a set position through the inclined blank discharging system 13.
Wherein step 30 comprises: the dummy bar is separated from the casting blank by a dummy bar removing device 10, and the dummy bar is recovered and stored by a dummy bar storage device 11.
The method can be used for producing the beam blank with the weight per meter more than 2.0t/m, and the operation steps are as follows during specific work:
the ladle 1 holds the refined molten steel, is hoisted to a receiving bay through a crown block, is placed on a butterfly-shaped rotary table, and is rotated through the ladle rotary table 2, so that the ladle 1 is stopped above the intermediate tank 3. The molten steel is distributed to the respective flow of the blank molds 4 through the tundish 3. After the molten steel in the crystallizer 4 is proper in height, the withdrawal and straightening machine 9 starts, and the crystallizer vibration device 5 synchronously vibrates along with the withdrawal and straightening machine 9 (the vibration frequency and the vibration amplitude of the crystallizer vibration device 5 can be matched with different vibration schemes according to the withdrawal speed, the steel type and the section). The withdrawal and straightening machine 9 withdraws the dummy bar and the cast slab, during which the cast slab gradually advances through the water spray cooling of the first segment 6, the second segment 7 and the third segment 16 and the clamping of the segments in different close-packed modes. During the period, the dummy bar is recovered through the dummy bar storage device 11 for the next casting; and after the dummy bar is pulled out of the withdrawal and straightening machine 9, the dummy bar is removed by using the dummy bar removing device 10.
And when the length of the casting blank meets the sizing requirement, starting the fire cutting machine 12 to cut, wherein the cutting gun of the fire cutting machine 12 needs to adjust the position of the cutting gun according to the shape of the casting blank and keep a proper distance from the surface of the casting blank due to different thicknesses of flanges and webs, so that the casting blank is cut efficiently. During the period that the casting blank starts to be cut, the blank receiving trolley in the oblique blank discharging system 13 can automatically receive the blank head of the fixed-length casting blank, so that the fixed-length casting blank is prevented from sliding off. After the fixed-size casting blank is cut, the blank receiving trolley is driven by the winch to be lifted above the ground together with the casting blank, and the casting blank is output through the casting blank pinch roll 14 and the blank discharging roller table 15.
From the above description, it can be seen that the above-mentioned embodiments of the present invention achieve the following technical effects:
the embodiment of the utility model provides a can make the casting blank neither receive the bending, also receive the aligning to reduce the casting blank because of receiving the crackle that these two external forces produced. The surface cracks of the casting blank caused by the accumulated water of the inner arc can be reduced when the straight arc-shaped or full arc-shaped continuous casting machine casts the special-shaped blank, so the utility model is particularly suitable for producing the crack sensitive steel with large section.
Because the embodiment of the utility model provides a do not have curved opening and water the base head, do not have the casting blank nose, also avoided full arc conticaster base head nose to collide the problem of withdrawal and straightening unit.
In addition, the arrangement mode of the multiple runners is suitable for the requirements of different casting machines on the yield, and is also beneficial to matching of converters with various tonnages.
The above description is only for the specific embodiments of the present invention, and the scope of the present invention can not be limited by the embodiments, so that the replacement of the equivalent components or the equivalent changes and modifications made according to the protection scope of the present invention should still belong to the scope covered by the present patent. In addition, the utility model provides an between technical feature and the technical feature, between technical feature and the technical scheme, all can the independent assortment use between technical scheme and the technical scheme.

Claims (8)

1. A continuous casting machine for producing preforms, comprising:
the ladle turret (2) is provided with a ladle (1);
the tundish (3) is arranged below the ladle turret (2), and an inlet at the upper end of the tundish (3) is connected with an outlet of the ladle (1);
the crystallizer component is arranged below the intermediate tank (3), and an inlet at the upper end of the crystallizer component is connected with an outlet at the lower end of the intermediate tank (3);
the fan-shaped section extends along the vertical direction and is arranged below the crystallizer component, and the upper end of the fan-shaped section is connected with the outlet at the lower end of the crystallizer component;
the withdrawal and straightening machine (9) is arranged along the vertical direction and is positioned below the sector section;
the fire cutting machine (12) and the oblique blank discharging system (13) are arranged below the withdrawal and straightening machine (9).
2. Continuous casting machine for the production of parisons in accordance with claim 1, in which the crystalliser assembly comprises a crystalliser (4) and crystalliser oscillating means (5), the crystalliser (4) being connected to the outlet of the lower end of the intermediate tank (3) and the crystalliser oscillating means (5) being connected to the side wall of the crystalliser (4).
3. Continuous casting machine for the production of parisons in accordance with claim 2, in which the crystallizer (4) has a wide face and a narrow face, the narrow face being of a straight plate-like configuration, the wide face being of a convex configuration and the wide face being provided with cooling water holes.
4. Continuous casting machine for the production of parisons according to claim 1, in which the sectors are provided, in succession, in a vertically downward direction, with a first sector (6), a second sector (7) and a third sector (16), the axis of the first sector (6), the axis of the second sector (7) and the axis of the third sector (16) being collinear.
5. Continuous casting machine for the production of parisons in accordance with claim 4, in which the first sector (6) is provided with octahedral-support close-packed clamps, the second sector (7) is provided with four-support close-packed clamps and the third sector (16) is provided with two-support close-packed clamps.
6. Continuous casting machine for the production of parisons according to claim 1, in which the sector is provided with a withdrawal straightening machine and a sector exchange device (8) on the same side as the withdrawal straightening machine (9).
7. The continuous casting machine for producing parisons in claim 1, further comprising:
the dummy ingot removing device (10) is arranged between the withdrawal and straightening machine (9) and the flame cutting machine (12), and the dummy ingot removing device (10) is used for separating a dummy bar from a casting blank;
and the dummy bar storage device (11) is arranged at one side of the dummy bar removing device (10) and is used for storing the dummy bars.
8. Continuous casting machine for the production of parisons in accordance with claim 1, in which the oblique ejection system (13) comprises:
the oblique blank discharging slide way is obliquely arranged in the horizontal direction, and the lower end of the oblique blank discharging slide way is arranged below the flame cutting machine (12);
the blank receiving trolley is arranged on the oblique blank outlet slide way in a sliding mode and can bear the casting blank cut by the fire cutting machine (12);
and the casting blank pinch roll (14) and the ejection roller table (15) are arranged along the horizontal direction and are connected with the upper end of the oblique ejection slide way.
CN202020289024.4U 2020-03-10 2020-03-10 Continuous casting machine for producing special-shaped blank Active CN211803735U (en)

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CN202020289024.4U CN211803735U (en) 2020-03-10 2020-03-10 Continuous casting machine for producing special-shaped blank

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Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN111168027A (en) * 2020-03-10 2020-05-19 中冶京诚工程技术有限公司 Continuous casting machine for producing special-shaped blank and production method

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN111168027A (en) * 2020-03-10 2020-05-19 中冶京诚工程技术有限公司 Continuous casting machine for producing special-shaped blank and production method

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