Blank ejection hot delivery system of square and rectangular blank continuous casting machine and hot delivery method of blank ejection hot delivery system

Abstract

The invention discloses a square and rectangular blank continuous casting machine ejection hot delivery system and a hot delivery method thereof, and belongs to the field of metallurgy continuous casting steel rolling. The invention relates to how to carry out efficient and energy-saving casting blank hot delivery on transformation or new construction of a continuous casting system and a steel rolling system, and the ejection hot delivery system is adopted to realize hot delivery of a single square rectangular casting blank, so that the smooth proceeding of hot delivery direct rolling production of the continuous casting square rectangular casting blank is ensured, the energy consumption is reduced, the metal yield is improved, and the production cost is reduced. The production benefit is improved, the carbon emission is reduced, and the energy-saving, carbon-reducing and green manufacturing requirements of the metallurgical industry are met.

Description

Technical Field

[0001] The invention relates to the technical field of metallurgical continuous casting and steel rolling, and more specifically to a square billet hot delivery system and a hot delivery method thereof for a square billet continuous casting machine. Background Art

[0002] The steelmaking workshop in Area 1 of Baowu Magang Long Products Division currently has four 50t converters, and the casting system is equipped with one 4-machine 4-strand small special-shaped billet continuous casting machine, one 3-machine 3-strand large special-shaped billet continuous casting machine, and two 6-machine 6-strand square billet continuous casting machines.

[0003] The second area of ​​Baowu Magang Long Products Division currently has 3 120t converters, 3 argon blowing devices, 3 LF furnaces, 2 vacuum treatment facilities (1 VD, 1 RH), and the casting system is equipped with a 2-machine 2-strand heavy-duty special-shaped billet continuous casting machine, a 6-machine 6-strand small square billet continuous casting machine, and 2 CSP production lines.

[0004] According to the overall development plan of Magang Co., Ltd. of Baowu Magang Group, after the new special steel project for capacity replacement is finally constructed and put into production, the steelmaking workshop in Area 1 of the Long Products Division will be shut down, the existing smelting system in Area 2 will be retained, the 6-machine 6-strand small square billet continuous casting machine and 2 CSP production lines will be dismantled, and the existing supply for large and small H-shaped steels and medium-sized materials will be changed from the steelmaking workshop in Area 1 of the Long Products Division to Area 2. It is planned to build a double-high bar rolling long product production line in the original medium plate area of ​​Area 2.

[0005] According to the planning requirements, the steelmaking workshop in Area 1 of the Long Products Division will be shut down. Area 2 currently has a 2-machine 2-strand heavy-duty special-shaped billet continuous casting machine that supplies billets for heavy H-shaped steel rolling. Area 2 will have a newly built 6-machine 6-strand special-shaped billet / square rectangular billet continuous casting machine that meets the requirements of Area 1 for supplying billets for small H-shaped steel and medium-sized rolled steel. The planned 4-machine 4-strand special-shaped billet continuous casting machine will supply billets for large and small H-shaped steel rolling. If a double-high rod long product production line is planned to be built in the original medium plate area of ​​Area 2, a 6-machine 6-strand 170mm×170mm~210mm×210mm square rectangular continuous casting machine must be planned. In order to save and reduce energy consumption, increase metal recovery, improve production efficiency, reduce carbon emissions, and meet the energy-saving, carbon-reduction and green manufacturing requirements of the metallurgical industry, the continuous casting system and the rolling system are required to achieve hot delivery of billets. Summary of the invention

[0006] 1. Technical problem to be solved by the invention

[0007] In view of the problem of how to achieve efficient and energy-saving hot delivery of continuous casting billets in the current plant's continuous casting system and rolling system transformation, the present invention aims to provide a billet hot delivery system and its hot delivery method for a square and rectangular billet continuous caster. By using the billet hot delivery system of the present invention, single square and rectangular billets can be hot delivered, ensuring the smooth progress of the hot delivery and direct rolling production of continuous casting square and rectangular billets, saving and reducing energy consumption, increasing the metal yield, improving production efficiency, reducing carbon emissions, and meeting the requirements of energy conservation and carbon reduction in the metallurgical industry for green manufacturing.

[0008] 2. Technical Solution

[0009] To achieve the above object, the technical solution provided by the present invention is as follows:

[0010] A billet hot delivery system for a square and rectangular billet continuous caster of the present invention includes an outfeed roller table for receiving the billets after continuous casting by the continuous caster; a steel turning device and a transverse steel shifting device are arranged on the side of the outfeed roller table. The steel turning device is used to turn the billets, and the transverse steel shifting device is used to push the turned billets onto the transfer table; behind the transfer table, there are a transverse steel fishing device, a billet pushing and separating device, and a transfer roller table. The transverse steel fishing device is used to move the billets on the transfer table to the billet pushing and separating device. The billet pushing and separating device is used to separate the billets and push single billets onto the transfer roller table, and the transfer roller table is used to convey the billets to the hot delivery roller table, thereby hot delivering the billets after continuous casting to the rolling process.

[0011] Furthermore, the hot delivery transmission direction of the billets between the transverse steel shifting device and the billet pushing and separating device is perpendicular to the billet outfeed direction received on the outfeed roller table; it is also perpendicular to the billet outfeed conveying direction on the hot delivery roller table.

[0012] Furthermore, the billet outfeed direction received on the outfeed roller table is opposite to the billet outfeed conveying direction on the hot delivery roller table.

[0013] Furthermore, the transverse steel shifting device and the transfer table are respectively located on both sides of the length direction of the outfeed roller table, and an emergency billet outfeed table is also arranged on the side of the outfeed roller table close to the transverse steel shifting device; the transverse steel shifting device is a two-way steel shifting device that can convey the billets to the emergency billet outfeed table.

[0014] Furthermore, a billet stepping cooling bed and a billet collecting table are successively arranged behind the transfer roller table along the pushing direction of the billet pushing and separating device. The billet stepping cooling bed is used to pick out the billets from the transfer roller table and move step by step with the billet stepping cooling bed.

[0015] Furthermore, it also includes an infrared cluster unit, which uses infrared camera imaging to monitor and detect the billet outfeed position signal and the number of billets for billet tracking and precisely control the operation of the billets at each stage.

[0016] Furthermore, a lifting baffle is arranged at the end of the outfeed roller table for billet stop and positioning.

[0017] The present invention also provides a hot charging method for the hot charging system of a square and rectangular billet continuous casting machine. Using the above-mentioned hot charging system, the billets after continuous casting by the continuous casting machine are received by the billet discharging roller table, the steel turning device turns the billets, the transverse steel shifting device laterally pushes the turned billets onto the transition table frame, the transverse steel fishing device fishes the steel and laterally transports the billets to the steel pushing and separating device, the steel pushing and separating device separates the billets and pushes the single billets onto the transition roller table, the transition roller table transports the billets to the hot charging roller table, and the hot charging roller table sends the steel to the rolling process, thereby hot charging the billets after continuous casting to the rolling process.

[0018] Furthermore, when hot charging and offline faults occur to the billets, the transverse steel shifting device pushes the billets onto the accident billet discharging table frame for billet discharging offline.

[0019] Furthermore, when it is necessary to cool the billets offline, the lower billet walking cooling bed picks out the billets from the transition roller table and realizes the walking movement during the lifting and walking of the cooling bed, and realizes automatic turning during the lifting and walking process.

[0020] 3. Beneficial effects

[0021] Adopting the technical solution provided by the present invention, compared with the prior art, it has the following beneficial effects:

[0022] (1) The hot charging system of the square and rectangular billet continuous casting machine of the present invention realizes hot charging of single square and rectangular billets, thus ensuring the smooth progress of the hot charging and direct rolling production of continuous casting square and rectangular billets, saving and reducing energy consumption, increasing the metal yield rate, improving production efficiency, reducing carbon emissions, and meeting the requirements of energy conservation and carbon reduction green manufacturing in the metallurgical industry.

[0023] (2) The hot charging system of the square and rectangular billet continuous casting machine of the present invention realizes the rapid transportation of billet hot charging in the continuous casting system, ensures the production process requirements of the square and rectangular billet hot charging system of the continuous casting machine, meets the high-rhythm process production requirements of the billet hot charging of the continuous casting machine, and reduces the investment cost of the continuous casting machine on the premise of ensuring the safe and reliable operation of the equipment.

[0024] (3) The hot charging system of the square and rectangular billet continuous casting machine of the present invention realizes the automatic interlocking control of all equipment in the hot charging system under the condition of meeting the high-rhythm process production requirements of the billet hot charging of the continuous casting machine, improves the production safety and intelligent level of the continuous casting machine, and minimizes the labor cost to the greatest extent; at the same time, it improves the safe and reliable operation of the equipment and improves the production efficiency of the continuous casting machine.

[0025] (4) The billet hot delivery system for the square and rectangular billet continuous casting machine of the present invention adopts a flexible push rod device of a two-way steel transfer machine for the transverse steel transfer device, which can realize billet output in two directions. At the same time, the processes of direct billet off-line and emergency off-line of the casting machine are considered. It not only meets the high-rhythm requirement of billet output in the continuous casting machine production process, improves the safety and reliability performance of the billet output equipment, increases the production efficiency of the continuous casting machine, but also reduces the investment cost of the billet output equipment of the continuous casting machine.

[0026] (5) The billet hot delivery system for the square and rectangular billet continuous casting machine of the present invention adopts the method of rapid steel fishing and transverse transportation. The steel fishing device can fish 4 - 6 billets each time and then quickly traverse horizontally to realize rapid steel transfer to the pusher and steel separating device, achieving rapid transportation of billets out of the continuous casting system. It can not only meet the billet output rhythm of fixed-length production in the continuous casting system, but also meet the process requirements of the hot delivery temperature of billets in the rolling mill system. BRIEF DESCRIPTION OF THE DRAWINGS

[0027] Figure 1 It is a schematic structural diagram of the billet hot delivery system for the square and rectangular billet continuous casting machine of the present invention.

[0028] Explanation of the reference numerals in the schematic diagram:

[0029] 1. Billet output roller table; 2. Steel turning device; 3. Transverse steel transfer device; 4. Transition bench; 5. Transverse steel fishing device; 6. Pusher and steel separating device; 7. Transition roller table; 8. Hot delivery roller table; 9. Lower billet walking beam cooling bed; 10. Lower billet collecting bench; 11. Emergency billet output bench; 12. Lifting baffle. DETAILED DESCRIPTION OF THE INVENTION

[0030] To further understand the content of the present invention, the present invention will be described in detail with reference to the accompanying drawings.

[0031] In the description of the present invention, it should be noted that the orientation or positional relationship indicated by the terms "center", "upper", "lower", "left", "right", "vertical", "horizontal", "inner", "outer", etc. is based on the orientation or positional relationship shown in the accompanying drawings. It is only for the convenience of describing the present invention and simplifying the description, rather than indicating or implying that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation, and therefore should not be construed as a limitation of the present invention. In addition, the terms "first", "second", "third" are only used for descriptive purposes and cannot be construed as indicating or implying relative importance.

[0032] The present invention will be further described below with reference to the embodiments.

[0033] Embodiment

[0034] According to the actual situation of the converter capacity, on-site facilities, site logistics in Area 2 and the planning requirements, a double-high-bar long product production line is to be built in the original medium plate area of Area 2. It is necessary to build a square and rectangular billet continuous caster with 6 machines and 6 strands, with dimensions ranging from 170mm×170mm to 210mm×210mm. According to the requirements of the matching between the continuous caster and the furnace, considering the flow field, superheat, continuous casting and service life design requirements of the tundish, a square and rectangular billet continuous caster with 6 machines and 6 strands is to be built, with a flow spacing of 1350mm and a basic arc radius of R10000 mm. The maximum drawing speed of the square billet is 3m / min, and the fixed length of the square billet is 10 - 12m. The continuous caster is designed according to the requirements of process technology configuration.

[0035] In view of the actual situation of on-site facilities and site logistics, in order to achieve efficient and energy-saving hot delivery of the cast billets between the continuous casting system and the rolling system, that is, the hot delivery system of the continuous casting billet output must achieve hot delivery of single square and rectangular cast billets.

[0036] The hot delivery system of the square and rectangular billet continuous caster designed in this embodiment is a unique hot delivery process design method and equipment configuration requirement suitable for the continuous casting of square billets or rectangular billets with dimensions of 170mm×170mm to 210mm×210mm to rolling. It specifically includes an output roller table 1, which is used to receive the cast billets after continuous casting by the continuous caster. A steel turning device 2 and a transverse steel shifting device 3 are arranged on the side of the output roller table 1. The steel turning device 2 is used to turn the cast billets, and the transverse steel shifting device 3 is used to push the turned cast billets onto the transition table 4. A transverse steel fishing device 5, a steel pushing and separating device 6 and a transition roller table 7 are arranged behind the transition table 4. The transverse steel fishing device 5 is used to move the cast billets on the transition table 4 to the steel pushing and separating device 6. The steel pushing and separating device 6 is used to separate the steel of the cast billets and push single cast billets onto the transition roller table 7. The transition roller table 7 is used to convey the cast billets to the hot delivery roller table 8, so as to hot deliver the cast billets after continuous casting to the rolling process.

[0037] Among them, the hot delivery transmission direction of the cast billets between the transverse steel shifting device 3 and the steel pushing and separating device 6 is perpendicular to the billet output direction received on the output roller table 1; it is also perpendicular to the billet output conveying direction on the hot delivery roller table 8. Specifically, the billet output direction received on the output roller table 1 is opposite to the billet output conveying direction on the hot delivery roller table 8.

[0038] In this embodiment, the billet discharging roller table 1 is used to receive and support the billets sent by the conveying roller table after hot cutting of the continuous casting machine. A lifting baffle 12 is arranged at the tail end of the billet discharging roller table 1 to meet the requirements of short fixed dimensions during production and prevent eccentric loading when the transverse steel shifting device 3 pushes the billets. The steel turning device 2 can realize steel turning and two-way billet transfer and support slideways, and turn the billets stopped on the billet discharging roller table 1 onto the support slideways of the steel turning device 2; in order to achieve fast response speed and precise position turning, the steel turning of the steel turning device 2 is controlled by an encoder, with fast response speed and precise position turning, and can buffer the rhythm of high-speed billet discharging of square and rectangular billets in the continuous casting system. The transverse steel shifting device 3 performs transverse pushing and can shift the steel in two directions, and moves the billets to the transition table 4 or the emergency billet discharging table 11 for billet discharging and offline. The transverse movement is controlled by an encoder to achieve precise positioning of the billets and improve the response speed at the same time. Similarly, the transverse steel fishing device 5 quickly transversely moves the billets on the transition table 4 to the billet pushing and separating device 6. To achieve precise positioning of the billets and improve the response speed at the same time, the steel fishing of the steel fishing device 5 is also controlled by an encoder. The billet separating device 6 has the functions of billet pushing and billet separating, separates the billets and pushes the single billet to the transition roller table 7. The pushing hydraulic cylinder of the billet pushing and separating device 6 is controlled by a linear position sensor. The transition roller table 7 conveys the billets to the hot delivery roller table 8, thereby conveying the billets to the rolling mill workshop to achieve hot delivery and direct rolling; the transition roller table 7 and the hot delivery roller table 8 are controlled by centralized interlocking.

[0039] Since the conveying directions of continuous casting billet discharging and the rolling process in the continuous casting process are both T-shaped perpendicular to the hot delivery conveying direction of this embodiment, combined with Figure 1 as shown, the arrow direction A is the billet discharging direction of the continuous casting machine in the continuous casting process, the arrow direction B is the hot delivery transmission direction of the hot delivery roller table 8 in the rolling process, the center line a is the center line of the continuous casting machine in the continuous casting process, the center line b is the hot delivery center line of the billets in the rolling process, and the transverse direction between a and b is the hot delivery direction of the billets. In this embodiment, the continuous casting billet discharging system and the rolling billet delivery system are integrated into one, so as to realize rapid hot delivery to the rolling process after continuous casting, meet the hot rolling requirements, save and reduce energy consumption, improve the metal yield, improve the production efficiency, reduce carbon emissions, and meet the requirements of energy conservation, carbon reduction and green manufacturing in the metallurgical industry.

[0040] In practice, the distance between the ab centerlines is often large. For example, in this embodiment, it reaches 43 m. To meet the production process requirements of the billet or rectangular billet hot charging system for the continuous casting machine, rapid conveying of the cast billets from the continuous casting system is required. It is difficult to meet this requirement by using a rotary roller table or by using a chain type and a drawing steel transverse movement. In this embodiment, a method of rapid steel fishing and conveying is adopted, that is, a transverse steel fishing device 5 is used. The steel fishing device 5 can fish 4 - 6 cast billets each time and then rapidly traverse laterally, so as to rapidly transfer the steel to the pusher and steel separating device 6. The pusher and steel separating device 6 has the functions of rapid conveying and steel separation, so as to realize the rapid conveying and steel separation of the cast billets from the continuous casting system, which can meet both the billet sizing production rhythm of the continuous casting system and the hot charging temperature process requirements of the rolling system for the cast billets. Correspondingly, since the pusher and steel separating device 6 receives 4 - 6 cast billets, the pusher and steel separating device 6 not only has the function of pushing the steel, but also has the function of step-by-step steel separation. For this purpose, the pusher and steel separating device 6 uses a hydraulic cylinder to control the pushing of the cast billets, and the maximum stroke meets the requirement of pushing 6 cast billets. To realize the function of pushing the steel step-by-step and separating the steel, one cast billet is pushed into the transfer roller table 7. The pushing hydraulic cylinder of the pusher and steel separating device 6 is controlled by an internal linear sensor, and the step-by-step stroke is determined according to the cross-sectional size of the cast billet. At the same time, according to the requirements of different step-by-step stroke operations for controlling 4 - 6 cast billets, the precise stepping of the cast billets to the transfer roller table 7 is realized.

[0041] To prevent failures or maintenance in the hot charging of the cast billets, a direct offline of the cast billets is designed and configured in the billet hot charging system of this embodiment. A production process of offline billet discharging of steel fishing - pusher and steel separating - roller table - cold bed steel picking and stepping - collecting table is adopted. A blanking stepping cold bed 9 and a blanking collecting table 10 are configured on one side of the transfer roller table 7 for the offline conveying, straightening, cooling and collecting of the cast billets. The blanking cold bed 9 directly picks out the cast billets from the transfer roller table 7, and realizes the stepping movement during the lifting and stepping of the cold bed. During the stepping lifting process, automatic flipping is realized, which increases the cooling area of the cast billets, improves the cooling speed and the uniform cooling effect of the cast billets, and avoids the deformation of the cast billets. At the same time, due to the automatic flipping of the cast billets, the automatic straightening of the cast billets is realized, effectively improving the quality of the cast billets. When the cast billets are directly offline, it is required that the transfer roller table 7 be in a locked stop state and not allowed to run.

[0042] In addition, to prevent failures in the hot charging and offline of the cast billets, an accident billet discharging table 11 is also arranged on one side of the billet discharging roller table 1 in the billet hot charging system of this embodiment. This requires that the transverse steel transfer device 3 has a two-way steel transfer function, that is, it can push the cast billets to the accident billet discharging table 11 for billet discharging and offline, so as to maintain the continuous production of the continuous casting.

[0043] The above schematically describes the present invention and its embodiments. This description is not restrictive, but only one of the embodiments of the present invention, and actually is not limited thereto. Therefore, if those of ordinary skill in the art are inspired by it and design, without creative work, a structural manner and an embodiment similar to this technical solution without departing from the purpose of the present invention, they should all fall within the protection scope of the present invention.

Claims

1. A billet hot delivery system for a square and rectangular billet continuous casting machine, characterized in that: It includes a billet discharging roller table (1) which is used to receive the billets after continuous casting by a continuous caster; a steel turning device (2) and a transverse steel shifting device (3) are arranged on the side of the billet discharging roller table (1). The steel turning device (2) is used to turn the billets, and the transverse steel shifting device (3) is used to push the turned billets onto a transition rack (4); a transverse steel fishing device (5), a steel pushing and separating device (6) and a transition roller table (7) are arranged behind the transition rack (4). The transverse steel fishing device (5) is used to move the billets on the transition rack (4) to the steel pushing and separating device (6). The steel pushing and separating device (6) is used to separate the billets and push single billets onto the transition roller table (7). The transition roller table (7) is used to convey the billets to a hot charging roller table (8), so as to hot charge the billets after continuous casting to the rolling process.

2. The billet hot delivery system for a square and rectangular billet continuous casting machine according to claim 1, wherein: The hot charging transmission direction of the billets between the transverse steel shifting device (3) and the steel pushing and separating device (6) is perpendicular to the billet discharging direction of the billets received on the billet discharging roller table (1); it is also perpendicular to the billet discharging and conveying direction of the billets on the hot charging roller table (8).

3. The billet hot delivery system for a square and rectangular billet continuous casting machine according to claim 2, wherein: The billet discharging direction of the billets received on the billet discharging roller table (1) is opposite to the billet discharging and conveying direction of the billets on the hot charging roller table (8).

4. A billet hot delivery system for a square and rectangular billet continuous casting machine according to claim 1, characterized in that: The transverse steel shifting device (3) and the transition rack (4) are respectively located on both sides of the billet discharging roller table (1) in the length direction, and an accident billet discharging rack (11) is also arranged on the side of the billet discharging roller table (1) close to the transverse steel shifting device (3); the transverse steel shifting device (3) is a two-way steel shifting device and can convey the billets onto the accident billet discharging rack (11).

5. A billet hot delivery system for a square and rectangular billet continuous casting machine according to claim 1, characterized in that: Behind the transition roller table (7) along the pushing direction of the steel pushing and separating device (6), a billet discharging walking cooling bed (9) and a billet discharging collecting rack (10) are arranged in sequence. The billet discharging walking cooling bed (9) is used to pick out the billets from the transition roller table (7) and move forward step by step along with the billet discharging walking cooling bed (9).

6. A billet hot delivery system for a square and rectangular billet continuous casting machine according to any one of claims 1-5, characterized in that: It also includes an infrared cluster unit which uses infrared camera imaging to monitor and detect the billet discharging position signals and the number of billets for billet tracking and precisely control the operation of the billets at each stage.

7. A billet hot delivery system for a square and rectangular billet continuous casting machine according to any one of claims 1-5, characterized in that: A lifting baffle (12) is arranged at the end of the billet discharging roller table (1) for stopping and positioning the billets.

8. A hot charging method for the hot charging system of a slab continuous casting machine, using the hot charging system according to any one of claims 1-7, characterized in that: The billets after continuous casting by the continuous caster are received by the billet discharging roller table (1). The steel turning device (2) turns the billets. The transverse steel shifting device (3) transversely pushes the turned billets onto the transition rack (4). The transverse steel fishing device (5) fishes the billets and transversely moves the billets to the steel pushing and separating device (6). The steel pushing and separating device (6) separates the billets and pushes single billets onto the transition roller table (7). The transition roller table (7) conveys the billets to the hot charging roller table (8). The hot charging roller table (8) sends the steel to the rolling process, so as to hot charge the billets after continuous casting to the rolling process.

9. The hot charging method of the hot charging system for the billet discharging of a square and rectangular billet continuous caster according to claim 8, characterized in that: When there are hot charging and offline faults with the billets, the transverse steel shifting device (3) pushes the billets onto the accident billet discharging rack (11) for billet discharging and going offline.

10. The hot charging method of the hot charging system for the billet discharging of a square and rectangular billet continuous casting machine according to claim 8, characterized in that: When it is necessary to cool the billets offline, the billet discharging walking cooling bed (9) picks out the billets from the transition roller table (7) and realizes the stepping movement during the lifting and stepping of the cooling bed, and realizes automatic turning during the stepping and lifting process.

Images