CN108436046B - Vertical continuous casting production equipment and method for oversized round billet - Google Patents

Abstract

The application discloses a vertical continuous casting production device and a method for oversized round billets, wherein the vertical continuous casting production device for oversized round billets comprises a steel ladle (1), a middle tank (4), a crystallizer (6), a billet drawing system and a billet discharging system, wherein the billet discharging system comprises a casting billet discharging device (20), a casting billet combining device (23), a casting billet lifting device (25) and an upper billet discharging roller way (28). The vertical continuous casting production equipment and method mainly aim at the ultra-large-specification round billet with the diameter of 600 mm-1300 mm, adopt a brand new billet drawing system, a billet discharging system and other technologies, and adopt a plurality of matched technical equipment, so that the vertical continuous casting process method is suitable for producing various steel types such as carbon steel, combined steel and the like, especially medium-high alloy clean steel and steel types with high casting crack sensitivity, thereby realizing continuous production of large-section high-quality billets.

Description

A kind of vertical continuous casting production equipment and method for oversized round billets

Technical field

The invention relates to the technical field of steel smelting, specifically a vertical continuous casting production equipment for oversized round billets, and a vertical continuous casting method for oversized round billets.

Background technique

With the development of downstream steel manufacturing, material processing and other industries, based on the market demand for reducing material consumption and shortening the processing process, the market for large and medium-sized high-quality special steel round billets that are cast instead of ingots continues to expand, with ultra-large cross-sections of Ф1000mm and above, medium and high alloys The industrial production and development of high value-added blanks such as clean steel and highly sensitive casting cracks is gradually becoming the focus of the industry and will become a high-end field of special materials production.

Large-size round billets have high requirements on the internal quality homogeneity of the cast billet, and have stricter requirements on surface quality, internal cracks, internal segregation and center porosity. According to recent practice, it is generally necessary to be equipped with mold hydraulic vibration and mold liquid level. Automatic control, electromagnetic stirring technology, and a complete set of reasonable process control parameters (including mold powder, superheat, immersed nozzle, control of molten steel cleanliness, temperature control of the slab solidification process, optimization of cooling system parameters) and other technologies, in order to achieve The purpose of producing defect-free cast slabs. This product is expected to become an iconic high-end equipment product in the field of high-quality special steel.

At present, some of the patents that have been applied for in China are for a certain equipment, device or component of the vertical continuous casting system, some are for a certain process of the vertical continuous casting system, and some are for the process of the vertical continuous casting system, but for The product cross-section specifications are different, resulting in very different technical methods. Publicly published patents and related articles mainly focus on traditional billet vertical continuous casting and thin strip vertical continuous casting. The relevant patents for vertical continuous casting of large round billets are very different from the technical methods described in this patent in terms of product specifications and actual technical methods and equipment, and there is no patent that proposes effective continuous casting of round billets with a super-large cross-section of Φ1300mm. Casting technology methods.

Contents of the invention

In order to solve the problem that the existing vertical continuous casting production equipment is not suitable for producing oversized round billets. The invention provides a vertical continuous casting production equipment and method for super-large round billets. The vertical continuous casting production equipment for super-large round billets is mainly aimed at super-large round billets with a cross-section of Φ600mm to Φ1300mm, and adopts a new blank drawing method. System and billet discharge system and other technologies, and adopts a number of supporting technical equipment, making this vertical continuous casting process suitable for the production of carbon steel, composite steel and other types of steel, especially medium and high alloy clean steel, pouring crack Highly sensitive steel grades to achieve continuous production of large-section, high-quality blanks.

The technical solution adopted by the present invention to solve the technical problem is: a vertical continuous casting production equipment for oversized round billets, including a ladle, a tundish, a crystallizer, a billet drawing system and a billet discharge system. The billet discharge system contains a casting system. The billet discharge device, the billet merging device, the billet lifting device and the upper billet discharge roller. The ladle, tundish, crystallizer and the billet drawing system are arranged in sequence from top to bottom. The billet discharge device is connected with the billet drawing system. Corresponding to the outlet of the system, the billet unloading device and the billet doubling device are arranged on the left and right. The billet doubling device corresponds to the lower inlet of the billet lifting device, and the upper billet discharging roller is located at the upper outlet of the billet lifting device.

The vertical continuous casting production equipment for oversized round billets also includes a rotary table or ladle car that can transport the ladle to the pouring position. A sliding nozzle and a long nozzle are provided between the ladle and the tundish.

The intermediate tank is connected with an induction heating device, and the crystallizer is connected with a crystallizer electromagnetic stirring device, a crystallizer internal and external arc hydraulic vibration device, and a crystallizer liquid level detection device.

The billet pulling system includes a billet centering device, a lifting rail, a billet guide device and a billet lifting equipment. The billet centering device is located between the mold and the lifting rail, the billet guide device and the billet lifting equipment. All are connected to lifting tracks.

The lifting track contains columns and beams. The lifting track has an upright frame structure. The cross section of the lifting track is square. The billet lifting equipment includes a first lifting device, a second lifting device and a third lifting device arranged in sequence from top to bottom. .

A first clamping device is connected to the first lifting device, and a second clamping device is connected to the second lifting device. The first lifting device can drive the first clamping device to rise and fall, and the second lifting device can drive the second clamping device. Lift.

A fire cutting machine is also connected to the second lifting device. The second lifting device can drive the fire cutting machine to rise and fall. The fire cutting machine is located below the second clamping device. The third lifting device contains a slab guide device and a support set up and down. The third lifting device can drive the billet guide device and the billet holding device to lift.

The first clamp device includes a left connecting base, a left clamp base, a right clamp base, a connecting block, a hydraulic cylinder and a right connecting base arranged in sequence from left to right. The left connecting base is connected to the left clamp base, and the left clamp There are clamp blocks fixed in the base and the right clamp base. The left clamp base and the right clamp base are both set on the track. The hydraulic cylinder is hinged with the connecting block and the right connecting base through the connecting rod. When the piston rod of the hydraulic cylinder extends When the hydraulic cylinder is retracted, the distance between the left clamp base and the right clamp base can be reduced; when the piston rod of the hydraulic cylinder is retracted, the distance between the left clamp base and the right clamp base can be increased.

The billet discharging device includes a billet discharging car and a billet discharging car roller conveyor. The billet discharging car can walk on the billet discharging car roller conveyor. The billet discharging car contains a balancing clamp device and a billet tipping device. The billet discharging device includes a billet merging device. The right end of the machine is equipped with a fixed baffle, and the upper billet discharging roller is equipped with a fire cutting machine and a marking machine.

A vertical continuous casting method for oversized round billets. The vertical continuous casting method for oversized round billets adopts the above-mentioned vertical continuous casting production equipment for oversized round billets. The vertical continuous casting method for oversized round billets is The continuous casting method includes the following steps:

Step 1. Lift the dummy rod to the lower part of the crystallizer;

Step 2: The ladle pours molten steel into the tundish;

Step 3: The blank drawing system performs blank drawing;

Step 4: The billet discharging system performs billet discharging.

The beneficial effects of the present invention are:

1. The technical method of the present invention uses the existing mature technology to improve the quality of large-sized cross-section cast slabs as much as possible, and combines the advantages of vertical continuous casting itself to produce a variety of steel types, especially those with high cleanliness requirements. and high-quality special steel round billets with high crack sensitivity.

2. Using the unique billet drawing system and billet discharge system of the present invention, it is possible to produce various specifications of cast billets with cross-section specifications ranging from Φ600mm to Φ1300mm and lengths ranging from 3.5m to 6m, thereby expanding the product range.

3. The present invention realizes the continuity and stabilization of the production of ultra-large-sized high-quality special steel round billets, improves productivity and yield, and significantly improves economic benefits.

Description of drawings

The description and drawings that constitute a part of this application are used to provide a further understanding of the present invention. The illustrative embodiments of the present invention and their descriptions are used to explain the present invention and do not constitute an improper limitation of the present invention.

Figure 1 is a front view of the vertical continuous casting production equipment for oversized round billets according to the present invention.

FIG. 2 is an enlarged schematic diagram of the left part in FIG. 1 .

FIG. 3 is a top view corresponding to the left part in FIG. 1 .

FIG. 4 is an enlarged schematic diagram of the right part in FIG. 1 .

Figure 5 is a schematic diagram of the lifting track.

Figure 6 is a schematic diagram of the slab guide device.

Figure 7 is a schematic diagram of the slab lifting equipment.

Figure 8 is a schematic diagram of the clamping device.

Figure 9 is a detailed flow chart of the vertical continuous casting method of oversized round billets.

Figure 10 is the logic and schematic diagram of billet pulling operation.

1. Ladle; 2. Rotary table; 3. Long nozzle; 4. Intermediate tank; 5. Submerged nozzle; 6. Crystallizer; 7. Crystallizer electromagnetic stirring device; 8. Crystallizer internal and external arc hydraulic vibration device; 9. Movable guide section; 10. Dummy rod; 11. Cast slab centering device; 12. First clamping device; 13. First lifting device; 14. Second clamping device; 15. Fire cutting machine; 16. 2. Lifting device; 17. Third lifting device; 18. Billet guiding device; 19. Billet holding device; 20. Billet discharge device; 21. Balance clamp device; 22. Billet discharge car roller table; 23. Casting Billet combining device; 24. Billet combining roller table; 25. Billet lifting device; 26. Conveying roller table; 27. Fixed baffle; 28. Upper billet discharge roller table; 29. Lifting track;

121. Left connecting seat; 122. Left clamp seat; 123. Right clamp seat; 124. Connecting block; 125. Hydraulic cylinder; 126. Right connecting seat; 127. Clamp block; 128. Track; 129. Connecting rod .

Detailed ways

It should be noted that, as long as there is no conflict, the embodiments and features in the embodiments of this application can be combined with each other. The present invention will be described in detail below with reference to the accompanying drawings and embodiments.

A vertical continuous casting production equipment for oversized round billets, including a ladle 1, a tundish 4, a crystallizer 6, a billet drawing system and a billet discharging system. The billet discharging system contains a billet discharging device 20, billet merging Device 23, billet lifting device 25 and upper billet discharge roller 28, ladle 1, tundish 4, crystallizer 6 and the billet drawing system are arranged in sequence from top to bottom. The outlet of the billet drawing system and the billet discharge device Corresponding to 20, the slab discharge device 20 and the slab doubling device 23 are arranged on the left and right. The lower inlet of the slab lifting device 25 corresponds to the slab dosing device 23, and the upper slab discharge roller 28 is located on the slab lifting device 25. The upper outlet is shown in Figure 1 to Figure 4.

In this embodiment, the vertical continuous casting production equipment for oversized round billets also includes a rotary table 2 or a ladle cart that can transport the ladle 1 to the pouring position. A sliding nozzle and a ladle are provided between the ladle 1 and the intermediate tank 4. Changshuikou 3. The operation mode of ladle 1 can adopt the layout of a rotary table or a ladle car according to the conditions of the factory building. In this embodiment, the rotary table 2 is used.

In this embodiment, the intermediate tank 4 is connected with an induction heating device. For high-purity steel, the tundish tank 4 adopts a deep liquid level and large capacity design to give full play to the metallurgical effect of the tundish tank 4. And it is assisted by induction heating to achieve low superheat pouring of high-quality special steel.

In this embodiment, the crystallizer 6 is connected to a crystallizer electromagnetic stirring device 7, a crystallizer internal and external arc hydraulic vibration device 8 and a crystallizer liquid level detection device. The crystallizer 6 adopts a copper tube type and adopts an upper and lower two-layer equipment combination. Through the difference in heat transfer capacity of the upper and lower parts, the heat preservation of the molten steel at the end of pouring is achieved, which promotes the feeding of the tail billet and improves the metal yield. The mold electromagnetic stirring device 7, the mold internal and external arc hydraulic vibration device 8, and the mold liquid level detection device and control system are used to improve the internal and surface quality of the cast slab.

After the continuous casting billet comes out of the crystallizer 6, the cooling process control of the continuous casting billet is mainly achieved through cooling and heat preservation. The cooling is mainly the cooling of the crystallizer and the cooling of the guide foot roller section after coming out of the crystallizer. After that, heat preservation measures are taken to Make the surface temperature of the billet and the thickness of the billet shell within a reasonable range, thereby ensuring the quality of the billet and the normal operation of the billet drawing system and the billet discharge system.

In this embodiment, the main functions of the billet drawing system are to feed ingots and draw the billet. The billet drawing system includes a billet centering device 11, a lifting track 29, a billet guide device 18 and a billet lifting equipment. The slab centering device 11 is located between the mold 6 and the lifting rail 29. The slab centering device 11 is used to center the dummy rod 10 when the ingot is raised, so that the center line of the dummy rod 10 is in line with the lifting rail 29. The center lines of the slabs are coincident with each other, and the slab is guided when the slab is drawn. The slab centering device 11 is driven by hydraulic pressure. The slab guide device 18 and the slab lifting equipment are both connected to the lifting track 29, as shown in Figures 1 to 7.

In this embodiment, the lifting rail 29 provides guidance and support, and is composed of four columns and beams to form a square structure. That is, the lifting rail 29 has a square cross-section, and the lifting rail 29 has an upright frame structure, which is made by tailor-welding steel and steel plates. , passing through each layer of platform from bottom to top, and 4 bases are set at each layer to fix the columns and the platform, as shown in Figure 5. The billet lifting equipment is fixed in the lifting track 29. The billet lifting equipment includes a first lifting device 13, a second lifting device 16 and a third lifting device 17 arranged in sequence from top to bottom.

In this embodiment, the first clamping device 12 is connected to the first lifting device 13, and the second clamping device 14 is connected to the second lifting device 16. The first lifting device 13 can drive the first clamping device 12 to lift. , the first clamping device 12 can clamp and fix the dummy bar 10 or the cast slab, the second lifting device 16 can drive the second clamping device 14 to lift, and the second clamping device 14 can clamp and fix the dummy bar 10 or the cast slab. blank, as shown in Figure 7.

In this embodiment, a fire cutting machine 15 is also connected to the second lifting device 16. The second lifting device 16 can also drive the fire cutting machine 15 to rise and fall. The fire cutting machine 15 is located below the second clamping device 14. The third lifting device 16 is also connected to the fire cutting machine 15. The lifting device 17 contains a slab guiding device 18 and a slab supporting device 19 arranged up and down. The third lifting device 17 can drive the slab guiding device 18 and the slab supporting device 19 to rise and fall.

In this embodiment, the first clamp device 12 includes a left connecting seat 121, a left clamping seat 122, a right clamping seat 123, a connecting block 124, a hydraulic cylinder 125 and a right connecting seat 126 arranged in sequence from left to right. The left connecting base 121 is connected to the left clamp base 122. The left clamp base 122 and the right clamp base 123 are both fixed with clamp blocks 127. The left clamp base 122 and the right clamp base 123 are both arranged on the track 128. The hydraulic cylinder 125 is hingedly connected to the connecting block 124 and the right connecting seat 126 through four connecting rods 129. Both ends of the connecting rod 129 on the left side of the hydraulic cylinder 125 are hinged to the hydraulic cylinder 125 and the connecting block 124 respectively. Both ends of the rod 129 are hinged with the hydraulic cylinder 125 and the right connecting seat 126 respectively. Both the left clamp seat 122 and the right clamp seat 123 can slide left and right on the track 128. The track 128 is in a horizontal state. The track 128 is connected and fixed with the lifting track 29. . When the piston rod of the hydraulic cylinder 125 extends, the distance between the left clamp base 122 and the right clamp base 123 can be reduced, thereby clamping the dummy rod 10 or the slab; when the piston rod of the hydraulic cylinder 125 retracts , the distance between the left clamp base 122 and the right clamp base 123 can be increased, thereby loosening the dummy bar 10 or the billet.

The billet guide 18 is located at the bottom of the pit of the vertical continuous casting production equipment for the oversized round billet. The billet guide 18 can guide and support the cut fixed-length billet to prevent it from tilting. The slab guide device 18 is mainly composed of a hydraulic cylinder, a connecting rod mechanism, a guide wheel, etc. According to different cross-sections, the hydraulic cylinder extension stroke is controlled by a displacement sensor, thereby forming a clamping opening corresponding to the cast slab, as shown in Figure 6.

The first lifting device 13 includes a frame and a driving mechanism. The structures of the first lifting device 13, the second lifting device 16 and the third lifting device 17 are basically the same. Three lifting devices are arranged from bottom to top to complete the drawing relay through clamps. The frame is made of profiled steel and has a total of 8 sets of guide wheels at the upper and lower corners. The drive mechanism adopts a variable frequency motor + screw lift solution, in which each set of drive mechanism is composed of 1 variable frequency motor through 2 commutators and couplings, and 4 screw lifts are connected in series and parallel to work simultaneously, and the weight of the slab is slowly loaded. Draw the blank downward, as shown in Figure 7. The first lifting device 13, the second lifting device 16 and the third lifting device 17 are compact in structure, take up little space, and have large load-bearing capacity. The vertically installed screw rod is tensioned to avoid bending deformation under heavy load. The mechanical connection synchronization is good and can be 24 It works continuously for hours and is less affected by high temperatures; the variable frequency drive and encoder detection feedback are beneficial to controlling the casting speed.

The structures of the first clamping device 12 and the second clamping device 14 are basically the same. The first clamping device 12 and the second clamping device 14 are used to clamp the casting billet during the process of unloading the billet so that it does not slide down. Ensure that the cast slab is lowered at the casting speed. Since a single clamp requires a large clamping capacity, the design uses the output force of the hydraulic cylinder, which is amplified by a lever and used as the clamping force of the slab, as shown in Figure 8. The fire cutting machine 15 is fixed on the frame of the second lifting device 16 and moves up and down together with the frame.

In this embodiment, the casting billet discharging device 20 includes a billet discharging car and a billet discharging car roller conveyor 22. The billet discharging car can travel on the billet discharging car roller conveyor 22. The billet discharging car contains a balancing clamp device 21 and a billet discharging device 20. The billet tipping equipment has a fixed baffle 27 at the right end of the billet merging device 23, and a fire cutting machine and a marking machine are provided on the upper billet discharging roller 28.

The billet discharging car is used to vertically move out the cut fixed-length cast slab or dummy bar, and after dumping, transport it to the billet merging roller conveyor 24 of the billet merging device 23 by the billet discharging car roller conveyor 22 . The billet discharging car runs on the billet discharging car roller table 22. The billet discharging car is equipped with a balancing clamp device 21 and billet tipping equipment. The traveling transmission device is driven by a gear motor, and the clamps and tipping equipment are driven by hydraulic pressure. The roller table consists of multiple individually motor-driven rollers.

The slab combining device 23 receives the slab on the slab car roller conveyor 22 and transports it to the conveying roller conveyor 26 on the slab lifting device 25 . Since multiple streams share one slab merging device 23, the device moves back and forth between the streams to receive the slabs on the roller conveyor 22 of the front billet discharging car, and moves to the front of the slab lifting device 25, passing through the driving roller. The cast slab is transported to the cast slab lifting device 25. The travel transmission of the slab combining device 23 is driven by a gear motor, and the roller table is driven by a motor. A lifting baffle 27 is provided at the end of the roller table for controlling the positioning of the slab.

The fixed-length cast slab is transported to the conveying roller 26 on the slab lifting device 25 through the rollers on the slab transverse movement and billet combining device, and is positioned by the fixed baffle 27 at the end of the roller. After the slab stops, the cast slab is The billet lifting device 25 lifts the conveying roller 26 together with the cast billet to the height of the billet roller surface through a mechanical hoisting mechanism, and then the cast billet is driven by the roller conveyor to the upper billet discharging roller 28 to complete the billet discharging in the entire foundation pit. process. The lifting method adopts motor + winch device to ensure the blank discharging cycle requirements and operational stability. In addition, the upper billet discharge roller 28 transports the fixed-length cast billet to the lower line area. The upper billet discharge roller 28 can be equipped with a secondary fire cutting machine or a sample fire cutting machine, as well as a marking machine and other equipment to complete corresponding auxiliary functions and meet production requirements.

The vertical continuous casting production equipment for super-large round billets consists of cooling process model, low superheat pouring technology, mold vibration technology, mold liquid level control technology, billet tail insulation technology, electromagnetic stirring technology, horizontal cut-to-length cutting, Unique billet drawing system and billet discharge system and other technical integration.

This vertical continuous casting production equipment for super-large round billets is suitable for large-sized round billets ranging from Φ600mm to Φ1300mm, with a fixed length range of 3.5m to 6m, and can achieve 1 to 3 streams of casting. This vertical continuous casting production equipment for super-large round billets is suitable for the production of carbon steel, composite steel and other steel types, especially medium and high alloy clean steel and steel types with high sensitivity to casting cracks.

The following introduces the working process of the vertical continuous casting production equipment for this super-large round billet:

As shown in Figure 9, when the dummy is raised, the second section of the dummy rod 10 is lifted downward from the pouring platform to the designated position by the overhead crane, and then the first clamp device 12 is sent to the designated position by the first lifting device 13. position, when the centering device 11 is used to lift the dummy rod, the dummy rod 10 is centered, the first clamping device 12 clamps and holds the second section of the dummy rod 10, and then the crane clamp is loosened After opening, the first section of the dummy bar 10 is also lifted to the designated position. At this time, the operation is assisted by personnel. After connecting the two sections of the dummy bar 10, the crane then moves the movable guide section 9 and the crystallizer electromagnetic stirring device 7. Lift crystallizer 6 and other equipment to the production location.

The ladle 1 is transferred from the ladle receiving position to the pouring position through the rotary table 2, and the molten steel is poured into the intermediate tank 4 through the sliding nozzle and the long nozzle 3 for protection. The intermediate tank 4 is assisted by induction heating to achieve low superheat pouring of high-quality special steel. The molten steel in the tundish is poured into the crystallizer 6 through the immersion nozzle 5 for protection.

During pouring production, the crystallizer electromagnetic stirring device 7 and the crystallizer internal and external arc hydraulic vibration device 8 start to operate normally. The crystallizer liquid level detection device transmits signal data to the control system, and then controls the flow through the stopper rod mechanism.

After the continuous casting billet exits the crystallizer 6, it is cooled by air-water atomization in the guide foot roller section, and then passes through the surrounding sealed heat preservation area. The centering device 11 can be used to guide the cast billet on the way.

The first lifting device 13 and the second lifting device 16 each have a set of clamping devices, which can clamp the entire billet before cutting is completed; during the casting process, the first lifting device 13 and the second lifting device 16 use wire The clamp device (the first clamp device 12 and the second clamp device 14) and its frame are fixed by sliding away the bar, and the continuous casting process of the billet is realized by relay drawing.

The fire cutting machine 15 is fixed on the frame of the second lifting device 16 and moves up and down together with the frame. When the second lifting device 16 pulls the billet to the specified metallurgical length position, the third lifting device 17 also reaches the designated position, and the billet supporting device 19 will just contact the end face of the billet; after the above-mentioned lifting device is in place, the fire cutting machine 15 cuts the gun Begin cutting the slab horizontally. During cutting, the second lifting device 16 continues to pull the billet downward at a pulling speed simultaneously. Before the second clamp device 14 of the second lifting device 16 reaches the bottom end of the screw of the second lifting device 16, the billet will be cut. . The specific drawing process is shown in Figure 10.

During cutting, a unique high-pressure nitrogen blowing nozzle is used to perform high-pressure purge on the remaining cutting burrs on the end face of the billet. After the fixed-length cutting is completed, the fixed-length cast slab continues to move downward to the designated position with the third lifting device 17. During the process, the guide roller device 18 ensures that the cast slab is stable on the billet supporting device 19 of the third lifting device 17 and does not sideways. turn.

When the fixed-length cast billet arrives at the designated position of the third lifting device 17 with the billet support device 19, the balance clamp device 21 on the billet unloading vehicle will hold the billet out horizontally, and then dump it so that the billet is placed horizontally. And it is supported by the billet discharge car roller table 22 of the billet discharge device 20. Afterwards, the slab combining device 23 moves to the front of each stream to be discharged, and the fixed-length slab is driven by the discharge car roller conveyor 22 and transported to the slab combining roller conveyor 24 of the slab combining device. The slab combining device 23 Then it moves laterally to the entrance of the slab lifting device 25, and the fixed-length slab is driven by the billet combining roller conveyor 24 and transported to the conveying roller conveyor 26 of the slab lifting device 25. The end of the conveying roller 26 is provided with a fixed baffle 27, and the conveying roller 26 is provided with an anti-tilt and anti-slip device to prevent the cast slab from sliding obliquely.

After the fixed-length slab is in place, the slab lifting device 25 will use its own mechanical winch drive to lift the conveying roller 26 (including the fixed-length slab) to the upper slab discharge roller 28 on the workshop floor. Stop when the billet is pressed, and then the cast billet is transported to the upper billet discharging roller 28 to complete the billet discharging process. A secondary fire cutting machine or a sample fire cutting machine, as well as a marking machine and other equipment can be installed on the upper billet discharge roller 28 to complete corresponding auxiliary functions and meet production requirements.

Summarizing the working process of the above-mentioned vertical continuous casting production equipment for oversized round billets, the following is a vertical continuous casting method for oversized round billets. The vertical continuous casting method for oversized round billets adopts the above-mentioned oversized round billets. Vertical continuous casting production equipment for round billets. The vertical continuous casting method for oversized round billets includes the following steps:

Step 1. Lift the dummy rod 10 to the lower part of the crystallizer 6;

Step 2: Ladle 1 pours molten steel into the intermediate tank 4;

Step 3: The blank drawing system performs blank drawing;

Step 4: The billet discharging system performs billet discharging.

The above are only specific embodiments of the present invention and cannot be used to limit the scope of the invention. Therefore, the replacement of equivalent components, or equivalent changes and modifications made according to the patent protection scope of the present invention, should still be covered by this patent. category. In addition, the technical features in the present invention can be freely combined with each other, between technical features and technical solutions, and between technical solutions and technical solutions.

Claims (5)

1. A vertical continuous casting production equipment for oversized round billets, characterized in that the vertical continuous casting production equipment for oversized round billets includes a ladle (1), a tundish (4), and a crystallizer (6) , billet drawing system and billet discharging system. The billet discharging system includes a billet discharging device (20), a billet combining device (23), a billet lifting device (25) and an upper billet discharging roller (28). The ladle (1), tundish (4), crystallizer (6) and the billet drawing system are arranged in sequence from top to bottom. The billet discharging device (20) corresponds to the outlet of the billet drawing system. The billet discharging device (20) corresponds to the outlet of the billet drawing system. (20) and the billet merging device (23) are arranged on the left and right. The billet merging device (23) corresponds to the lower entrance of the billet lifting device (25). The upper billet discharge roller (28) is located in the billet lifting device. (25) upper outlet; The intermediate tank (4) is connected to an induction heating device, and the crystallizer (6) is connected to a crystallizer electromagnetic stirring device (7), a crystallizer internal and external arc hydraulic vibration device (8) and a crystallizer liquid level detection device; The billet drawing system includes a billet centering device (11), a lifting track (29), a billet guide device (18) and a billet lifting equipment. The billet centering device (11) is located in the crystallizer (6) and the lifting device. Between the rails (29), the slab guide device (18) and the slab lifting equipment are connected to the lifting rails (29); The lifting track (29) contains columns and beams. The lifting track (29) has an upright frame structure. The cross-section of the lifting track (29) is square. The billet lifting equipment includes first lifting devices (29) arranged sequentially from top to bottom. 13), the second lifting device (16) and the third lifting device (17); A first clamping device (12) is connected to the first lifting device (13), and a second clamping device (14) is connected to the second lifting device (16). The first lifting device (13) can drive the first clamping device. The clamp device (12) lifts and lowers, and the second lifting device (16) can drive the second clamp device (14) to lift; A fire cutting machine (15) is also connected to the second lifting device (16). The second lifting device (16) can drive the fire cutting machine (15) to rise and fall. The fire cutting machine (15) is located in the second clamping device (14). Below, the third lifting device (17) contains a slab guiding device (18) and a slab supporting device (19) arranged up and down. The third lifting device (17) can drive the slab guiding device (18) and the slab supporting device. (19) Lifting. 2. The vertical continuous casting production equipment for oversized round billets according to claim 1, characterized in that the vertical continuous casting production equipment for oversized round billets further includes a device capable of transporting the ladle (1) to the pouring position. The rotary table (2) or ladle car has a sliding nozzle and a long nozzle (3) between the ladle (1) and the intermediate tank (4). 3. The vertical continuous casting production equipment for oversized round billets according to claim 1, characterized in that the first clamp device (12) includes a left connecting seat (121) and a left clamp arranged sequentially from left to right. Clamp base (122), right clamp base (123), connecting block (124), hydraulic cylinder (125) and right connecting base (126), left connecting base (121) is connected to the left clamp base (122), left Clamp blocks (127) are fixed in the clamp base (122) and the right clamp base (123). The left clamp base (122) and the right clamp base (123) are both arranged on the track (128). The hydraulic The cylinder (125) is hinged with the connecting block (124) and the right connecting seat (126) through the connecting rod (129). When the piston rod of the hydraulic cylinder (125) extends, the left clamp seat (122) and the right clamp seat (123) can be reduced; when the piston rod of the hydraulic cylinder (125) is retracted, the distance between the left clamp base (122) and the right clamp base (123) can be increased. 4. Vertical continuous casting production equipment for oversized round billets according to claim 3, characterized in that the billet discharging device (20) includes a billet discharging car and a billet discharging car roller table (22). The car can walk on the roller conveyor of the billet discharge car (22). The billet discharge car contains a balance clamp device (21) and a billet tipping device. The right end of the billet merging device (23) is provided with a fixed baffle (27 ), the upper billet discharging roller table (28) is equipped with a fire cutting machine and a marking machine. 5. A vertical continuous casting method for oversized round billets, characterized in that the vertical continuous casting method for oversized round billets adopts the vertical continuous casting production equipment for oversized round billets according to claim 1 , the vertical continuous casting method of oversized round billets includes the following steps: Step 1. Lift the dummy rod (10) to the lower part of the crystallizer (6); Step 2: Pour molten steel from the ladle (1) into the intermediate tank (4); Step 3: The blank drawing system performs blank drawing; Step 4: The billet discharging system performs billet discharging.