CN215746308U

CN215746308U - Vertical continuous casting system for copper and copper alloy cast ingots

Info

Publication number: CN215746308U
Application number: CN202121785065.3U
Authority: CN
Inventors: 陈荣良
Original assignee: Suzhou Southeast Mechanical And Electrical Equipment Factory
Current assignee: Suzhou Southeast Mechanical And Electrical Equipment Factory
Priority date: 2021-08-03
Filing date: 2021-08-03
Publication date: 2022-02-08
Anticipated expiration: 2031-08-03

Abstract

The utility model relates to the technical field of metallurgical casting, and discloses a vertical continuous casting system for copper and copper alloy ingots, which comprises a smelting device, a material moving device and the following components in sequence from top to bottom: the device comprises a casting device, a cooling device, a traction device, a synchronous sawing mechanism and a turnover mechanism; the cooling device comprises a water-cooling atomizing ring and a cooling water tank positioned below the water-cooling atomizing ring, a water inlet pipe of the water-cooling atomizing ring is connected with a water outlet pipe of a cooler in the crystallizer, and water sprayed by the water-cooling atomizing ring flows into the cooling water tank; the traction device comprises a traction cast ingot and a traction roller set used for clamping and traction cast ingot, and the traction roller set is provided with a clamping force fine adjustment mechanism; the utility model can realize the vertical full-automatic continuous casting of copper and copper alloy cast ingots, and has the advantages of high production efficiency, good product uniformity and stability, high comprehensive yield and low unit energy consumption of products compared with the vertical semi-continuous casting.

Description

Vertical continuous casting system for copper and copper alloy cast ingots

Technical Field

The utility model relates to the technical field of metallurgical casting, in particular to a vertical continuous casting system for copper and copper alloy ingots.

Background

Copper and copper alloy have a series of excellent characteristics such as electrically conductive, heat conduction, corrosion resistance, wear resistance, antibacterial, can plate, high strength, high extension, be applied to important fields such as electric power, electron, machinery, traffic, information communication, aerospace, ocean engineering, intelligent manufacturing widely, be an important basic material.

In the process of processing and forming copper and copper alloy materials, alloy smelting refining and casting are the first and most important processes, and the advantages and disadvantages of the process determine the advantages and disadvantages of an original structure of the alloy, and the original defects in a casting structure cannot be eliminated in subsequent processing and finally become permanent defects of products, so that waste products are formed; secondly, the mechanical property and the physical and chemical properties of the alloy material are directly influenced, and particularly the uniformity and the long-term stability of the properties among different batches of products and at different positions of the same batch of products are influenced; and thirdly, the production efficiency, the comprehensive yield and the unit energy consumption of products in the industrial production of the products are directly influenced, so that the production cost is directly influenced.

The products produced in the existing casting system have a series of problems of structural defects, poor product uniformity and stability, low production efficiency, low comprehensive yield, high unit energy consumption of products and the like.

SUMMERY OF THE UTILITY MODEL

The utility model mainly aims to provide a vertical continuous casting system for copper and copper alloy ingots, which solves a series of problems of structural defects, poor product uniformity and stability, low production efficiency, low comprehensive yield, high unit energy consumption and the like of products produced in the casting system in the prior art.

In order to achieve the purpose, the utility model provides the following technical scheme:

the utility model provides a vertical continuous casting system of copper and copper alloy ingot casting, includes the smelting device, moves the material device, still includes that from the top down sets gradually:

the casting device comprises a crystallizer and a movable casting trolley for bearing the crystallizer, wherein a cooler is arranged in the crystallizer;

the cooling device comprises a water-cooling atomizing ring and a cooling water tank positioned below the water-cooling atomizing ring, a water inlet pipe of the water-cooling atomizing ring is connected with a water outlet pipe of a cooler in the crystallizer, and water sprayed by the water-cooling atomizing ring flows into the cooling water tank;

the traction device comprises a traction cast ingot and a traction roller set used for clamping and traction the cast ingot, and the traction roller set is provided with a clamping force fine adjustment mechanism;

the synchronous sawing mechanism is used for sawing off the cast ingot;

and the turnover mechanism is used for turning over the sawed cast ingot.

Further, the smelting device comprises a holding furnace for providing metal melt for the casting device and 2 smelting furnaces which can move horizontally and alternately provide metal melt for the holding furnace;

the material moving device comprises a conveying mechanism and a lifting mechanism, wherein the conveying mechanism is used for conveying the ingot to the lifting mechanism from the turnover mechanism, and the lifting mechanism is used for lifting the ingot to a workshop terrace.

Furthermore, the top of the heat preservation furnace is provided with 3 stirring devices, stirring paddles of the stirring devices extend into the heat preservation furnace, and the stirring paddles are made of silicon carbide materials.

Furthermore, the smelting furnace and the holding furnace are both power frequency cored induction smelting furnaces which are connected with IGBT power supplies.

Furthermore, the traction roller group comprises a first traction roller, a second traction roller, a first bearing seat and a second bearing seat, wherein the first bearing seat and the second bearing seat are respectively connected with the first traction roller and the second traction roller, the first bearing seat is connected with a movable guide pillar in a sliding mode, the movable guide pillar is fixedly connected with a fixed support, the second bearing seat is fixedly connected with a fixed support, the clamping force fine adjustment mechanism is a belleville spring, the first bearing seat is connected with one end of the belleville spring, and the other end of the belleville spring is connected with a driving motor through a worm and gear mechanism.

Further, the water-cooling atomizing ring comprises a water inlet pipe and an annular water spraying pipe, the water inlet pipe is communicated with the annular water spraying pipe, a plurality of spray heads are arranged on the annular water spraying pipe, and a water flow adjusting valve is arranged on the water inlet pipe.

Further, the casting trolley comprises a pipeline connected with a water inlet pipe of the cooler in the crystallizer, a vibration mechanism for vibrating the crystallizer and a roller arranged at the bottom of the casting trolley.

The utility model has the beneficial effects that:

1. the utility model provides a vertical continuous casting system for copper and copper alloy ingots, which can realize vertical full-automatic continuous casting of the copper and copper alloy ingots and has the advantages of high production efficiency, good product uniformity and stability, high comprehensive finished product rate and low unit energy consumption of products compared with vertical semi-continuous casting;

2. according to the utility model, the water inlet pipe of the water-cooling atomizing ring is connected with the water outlet pipe of the cooler in the crystallizer, and water sprayed by the water-cooling atomizing ring flows into the cooling water tank, so that the water can be cooled for many times, the temperature of the cooling water can be stably transited, and the casting residual stress caused by too large difference of the temperature of the cooling water cooled for many times is avoided;

3. the clamping force fine adjustment mechanism is arranged, so that the small change of the size of the cast ingot can be counteracted, and the phenomenon of slipping or blocking during the traction of the cast ingot can be effectively avoided;

4. according to the utility model, the stirring device is arranged in the heat preservation furnace, so that refining and degassing of the metal melt are realized, thereby avoiding generation of air holes in the cast ingot, optimizing the structure of the cast ingot and improving the quality of the cast ingot.

Drawings

The accompanying drawings, which are incorporated in and constitute a part of this application, illustrate embodiments of the utility model and, together with the description, serve to explain the utility model and not to limit the utility model. In the drawings:

FIG. 1 shows a schematic structural diagram according to an embodiment of the utility model;

FIG. 2 shows a schematic structural diagram of a smelting apparatus in an embodiment in accordance with the utility model;

FIG. 3 shows a schematic structural view of a casting device, a cooling device and a drawing device according to an embodiment of the present invention;

FIG. 4 shows a schematic structural diagram of a traction device in an embodiment in accordance with the utility model;

FIG. 5 shows a schematic structural diagram of a water-cooled atomizing ring according to an embodiment of the present invention;

FIG. 6 is a schematic structural view showing a holding furnace according to an embodiment of the present invention;

FIG. 7 shows a schematic structural view of a pulling ingot in accordance with an embodiment of the utility model;

wherein the figures include the following reference numerals:

1. a smelting device; 11. a holding furnace; 111. a stirring device; 12. a smelting furnace; 2. a casting device; 21. a crystallizer; 22. casting a trolley; 3. a cooling device; 31. a water-cooled atomizing ring; 311. a water inlet pipe; 312. an annular water spray pipe; 313. a temperature meter; 314. a pressure gauge; 315. a flow meter; 316. a water flow regulating valve; 32. a cooling water tank; 4. a traction device; 41. pulling the cast ingot; 42. a traction roller set; 421. a first pull roll; 422. a second pull roll; 43. a belleville spring; 44. a first bearing housing; 45. a second bearing housing; 46. moving the guide post; 47. fixing a bracket; 5. a synchronous sawing mechanism; 6. a turnover mechanism; 7. a transport mechanism; 8. a lifting mechanism.

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 embodiments with reference to the attached drawings.

As shown in fig. 1 to 6, according to an embodiment of the present invention, a vertical continuous casting system for copper and copper alloy ingots is provided.

Specifically, the device comprises a smelting device 1, a holding furnace 11 and a smelting furnace 12 with rollers capable of moving horizontally, wherein the smelting furnace 12 and the holding furnace 11 both adopt a power frequency cored induction smelting furnace which is connected with an IGBT power supply, and the IGBT power supply has the advantages that 1, the conduction voltage drop is smaller, and the loss generated by a component per se is lower when the current is the same; 2. the conduction angle of the IGBT power supply rectifying part is not adjusted, the direct-current voltage is at the highest value, and the power factor is greater than 0.98; 3. the power supply can realize frequency modulation constant power output without being influenced by the quantity of furnace burden; 4. the IGBT power supply does not adjust the conduction angle of the rectification part, does not generate higher harmonics, and has small influence on the power quality of a power grid; the 2 smelting furnaces 12 alternately provide metal melt for the holding furnace 11, so that the ingot can be continuously cast, and the holding furnace 11 provides metal melt for the casting device 2; the top of the holding furnace 11 is provided with 3 stirring devices 111, stirring paddles of the stirring devices 111 extend into the holding furnace 11, and the stirring paddles are made of silicon carbide materials and have better high-temperature resistance; through the rapid stirring of the stirring paddle, the refining and degassing of the metal melt are realized, so that the generation of air holes in the cast ingot is avoided, the organization structure of the cast ingot is optimized, and the quality of the cast ingot is improved.

The casting device 2 comprises a crystallizer 21 and a casting trolley 22 which bears the crystallizer 21 and is provided with a movable wheel, a cooler is arranged in the crystallizer 21, the casting trolley 22 comprises a pipeline connected with a water inlet pipe of the cooler in the crystallizer 21, and cooling water is safely and reliably provided for the crystallizer 21; the casting trolley 22 also comprises a vibration mechanism for vibrating the crystallizer 21, so that mechanical vibration with adjustable frequency and amplitude is provided for the casting process, the casting condition is improved, and the structure of the cast ingot is optimized; the bottom of the casting trolley 22 is provided with a roller which can move so as to ensure that the center line of a pouring pipe of the holding furnace 11, the center line of the crystallizer 21 and the center line of the traction cast ingot 41 are collinear.

A cooling device 3 is arranged below the casting device 2, the cooling device 3 comprises a water-cooling atomizing ring 31 and a cooling water tank 32 positioned below the water-cooling atomizing ring 31, a water inlet pipe 311 of the water-cooling atomizing ring 31 is connected with a water outlet pipe of a cooler in the crystallizer 21, and water sprayed by the water-cooling atomizing ring 31 flows into the cooling water tank 32; the water-cooling atomizing ring 31 comprises a water inlet pipe 311 and an annular water spraying pipe 312, wherein the water inlet pipe 311 is communicated with the water spraying pipe, a plurality of spray heads are arranged on the water spraying pipe, and a temperature instrument 313, a pressure instrument 314, a flow instrument 315 and a water flow regulating valve 316 are arranged on the water inlet pipe 311; because the cooling water flows into the water-cooling atomizing ring 31 from the cooler in the crystallizer 21 and then flows into the cooling water tank 32, the cooling water can be cooled for multiple times, the temperature of the cooling water can be stably transited, and the casting residual stress caused by too large difference of the temperature of the cooling water cooled for multiple times is avoided; practice proves that when the flow and temperature of water sprayed by the water-cooling atomizing ring 31 are not well controlled, casting stress difference is easily formed on the inner part and the outer part of the ingot, when the stress reaches a certain degree, micro cracks are generated on the surface or the inner part of the ingot, the defects are exposed during subsequent fine processing, quality defects are formed, and the damage to materials is great.

A traction device 4 is arranged below the cooling device 3, and a protective tray is arranged at the top of the traction device 4; the protective tray can collect water leakage of the upper casting cooling water collecting box under the unexpected condition on one hand, and can prevent objects falling from the upper part accidentally from damaging the traction device 4 on the other hand, thereby playing a role of effectively protecting equipment; the traction device 4 comprises a traction ingot 41 and a traction roller set 42 for clamping and drawing the ingot, the traction roller set 42 can be set into one group or two groups according to different casting alloys, the traction roller set 42 comprises a first traction roller 421 and a second traction roller 422, each traction roller is respectively driven by an alternating-current variable-frequency speed regulating motor, the traction speed is stepless adjustable and can be suitable for various copper and copper alloy castings needing different casting speeds, and a clamping force fine-adjustment mechanism is arranged on the traction roller set 42; the clamping force fine adjustment mechanism is a belleville spring 43, the traction roller group 42 comprises a first traction roller 421 and a second traction roller 422, the traction roller group further comprises a first bearing seat 44 and a second bearing seat 45 which are respectively connected with the first traction roller 421 and the second traction roller 422, the first bearing seat 44 is connected with a movable guide pillar 46 in a sliding mode, the movable guide pillar 46 is fixedly connected with a fixed support 47, the second bearing seat 45 is fixedly connected with the fixed support 47, the first bearing seat 44 is connected with one end of the belleville spring 43, and the other end of the belleville spring 43 is connected with a driving motor through a worm gear mechanism. The driving motor controls the first bearing seat 44 to move along the movable guide post 46 through the worm gear mechanism, so that the distance between the first traction roller 421 and the second traction roller 422 is adjusted, clamping force on the cast ingot is generated, and in the continuous casting process, the cast ingot is slightly changed in geometric dimension under the influence of various process conditions such as melt temperature, crystallizer cooling strength and the like, the butterfly spring 43 is arranged to offset the slight change of the cast ingot dimension, and the phenomenon of slipping or blocking during the traction of the cast ingot can be effectively avoided.

A synchronous sawing mechanism 5 is arranged below the traction device 4, and the synchronous sawing mechanism 5 is used for sawing off the cast ingot.

And a turnover mechanism 6 is arranged below the synchronous sawing mechanism 5 and used for turning over the ingot after sawing.

Still be equipped with and move the material device, including transport mechanism 7 and hoist mechanism 8, transport mechanism 7 is used for the ingot casting from hoist mechanism 8 is transported to tilting mechanism 6, hoist mechanism 8 is used for promoting the ingot casting to workshop terrace.

According to an embodiment of the present invention, there is also provided a vertical continuous casting method of copper and copper alloy ingots, including the steps of:

s1 preparation of high-temperature melt for casting copper and copper alloy

Sequentially adding the prepared metal raw materials into a smelting furnace 12 for smelting and refining; when the chemical composition, temperature and melt quality of the metal melt in the smelting furnace 12 reach the requirements of the converter, the metal melt in the smelting furnace 12 is transferred into the holding furnace 11 for further degassing and refining, and casting is waited.

S2: installation traction cast ingot

Firstly, the casting crystallizer 21 is detached from the casting trolley 22, a prepared traction cast ingot 41 is inserted from the upper part of the casting trolley 22 by using a crown block in a workshop, and is inserted between a first traction roller 421 and a second traction roller 422 after passing through the cooling device 3, and then the traction roller group 42 is controlled to clamp the traction cast ingot 41 to form a certain pretightening force; the distance between the upper end surface of the installed traction cast ingot 41 and the bottom of the casting trolley 22 is 300mm-500 mm.

S3: is continuously cast

S301, firstly, reinstalling the crystallizer 21 on the casting trolley 22 with a special structure, and connecting a casting cooling water pipeline; s302, controlling the traction device 4 to lift the traction cast ingot 41 to 150mm, inserting the traction cast ingot into the crystallizer 21, and opening cooling water of the crystallizer 21 and the cooling device 3; s303, turning the tilting heat preservation furnace 11 to a casting station, opening a metal melt discharge valve, and injecting the metal melt into the crystallizer 21; s304, controlling the traction device 4 to enable the traction cast ingot 41 to drive the solidified cast ingot to vertically move downwards; s305, when the ingot is moved downwards to a certain length, the synchronous sawing mechanism 5 is automatically started and synchronously walks and saws with the ingot; s306, after the sawing is finished, the synchronous sawing mechanism 5 moves horizontally to exit from the sawing station, the saw blade stops running, the synchronous sawing mechanism 5 continues to move downwards, the ingot after sawing is sent to the turnover mechanism 6, and then the synchronous sawing mechanism 5 moves upwards and returns to the initial position; s307, the turnover mechanism 6 is automatically started, the ingot is turned over at 90 degrees to be in a horizontal position, a driving roller way of the turnover mechanism 6 is automatically started, and the ingot is transferred to the conveying mechanism 7; s308, the conveying mechanism 7 is automatically started, the cast ingot is conveyed to the lifting mechanism 8, the lifting mechanism 8 is automatically started, and the cast ingot is vertically conveyed to a workshop terrace; s309, conveying the cast ingot to a temporary cast ingot storage roller way, weighing, checking and marking.

And repeating S305-S309, and continuously casting the ingot.

The above description is only a preferred embodiment of the present invention and is not intended to limit the present invention, and various modifications and changes may be made by those skilled in the art. Any modification, equivalent replacement, or improvement made within the spirit and principle of the present invention should be included in the protection scope of the present invention.

Claims

1. The utility model provides a vertical continuous casting system of copper and copper alloy ingot casting which characterized in that, includes smelting device (1), moves the material device, still includes from the top down and sets gradually:

the casting device (2) comprises a crystallizer (21) and a movable casting trolley (22) bearing the crystallizer (21), wherein a cooler is arranged in the crystallizer (21);

the cooling device (3) comprises a water-cooling atomizing ring (31) and a cooling water tank (32) positioned below the water-cooling atomizing ring (31), a water inlet pipe (311) of the water-cooling atomizing ring (31) is connected with a water outlet pipe of a cooler in the crystallizer (21), and water sprayed by the water-cooling atomizing ring (31) flows into the cooling water tank (32);

the traction device (4) comprises a traction ingot casting (41) and a traction roller set (42) for clamping and traction ingot casting, and the traction roller set (42) is provided with a clamping force fine adjustment mechanism;

the synchronous sawing mechanism (5) is used for sawing off the cast ingot;

and the turnover mechanism (6) is used for turning over the sawed ingot.

2. The vertical continuous casting system for copper and copper alloy ingots according to claim 1,

the smelting device (1) comprises a holding furnace (11) for providing metal melt for the casting device (2) and 2 smelting furnaces (12) which can move horizontally and alternately provide metal melt for the holding furnace (11);

the material moving device comprises a conveying mechanism (7) and a lifting mechanism (8), the conveying mechanism (7) is used for conveying the ingot to the lifting mechanism (8) from the turnover mechanism (6), and the lifting mechanism (8) is used for lifting the ingot to a workshop floor.

3. The vertical continuous casting system for copper and copper alloy ingots according to claim 2, wherein 3 stirring devices (111) are arranged at the top of the holding furnace (11), stirring paddles of the stirring devices (111) extend into the holding furnace (11), and the stirring paddles are made of silicon carbide materials.

4. The vertical continuous casting system for copper and copper alloy ingots according to claim 2, wherein the smelting furnace (12) and the holding furnace (11) are both power frequency cored induction smelting furnaces, and the power frequency cored induction smelting furnaces are connected with IGBT power supplies.

5. The vertical continuous casting system for copper and copper alloy ingots according to claim 1, wherein the drawing roller set (42) comprises a first drawing roller (421) and a second drawing roller (422), and further comprises a first bearing seat (44) and a second bearing seat (45) which are respectively connected with the first drawing roller (421) and the second drawing roller (422), the first bearing seat (44) is slidably connected with a movable guide pillar (46), the movable guide pillar (46) is fixedly connected with a fixed bracket (47), the second bearing seat (45) is fixedly connected with a fixed bracket (47), the clamping force fine-adjustment mechanism is a belleville spring (43), the first bearing seat (44) is connected with one end of the belleville spring (43), and the other end of the belleville spring (43) is connected with a driving motor through a worm gear mechanism.

6. The vertical continuous casting system for copper and copper alloy ingots according to claim 1, wherein the water-cooling atomizing ring (31) comprises a water inlet pipe (311) and an annular water spray pipe (312), the water inlet pipe (311) is communicated with the annular water spray pipe (312), a plurality of nozzles are arranged on the annular water spray pipe (312), and a water flow regulating valve (316) is arranged on the water inlet pipe (311).

7. The vertical continuous casting system for copper and copper alloy ingots according to claim 1, wherein the casting trolley (22) comprises a pipe connected to a water inlet pipe of a cooler in the crystallizer (21), a vibrating mechanism for vibrating the crystallizer (21), and rollers provided at the bottom of the casting trolley (22).