A combined flat ingot crystallizer composed of arcuate working copper plates

Abstract

The utility model provides a kind of combined flat ingot crystallizer constituted by arc working copper plate, including mirror image symmetry according to thickness middle division flat ingot crystallizer half module I and flat ingot crystallizer half module II.The inner cavity of flat ingot crystallizer half module I and flat ingot crystallizer half module II is composed of arc working copper plate, arc working copper plate is composed of 3 different curved surface arc working copper plate, arc working copper plate is formed by cold bending, the two ends of arc working copper plate are composed of the arc with section curvature radius R, arc length is, and the middle working copper plate is arc with radius 5 times.The utility model fundamentally changes the uneven temperature field distribution of the corner area of right-angle flat ingot crystallizer during electroslag remelting, thereby improving product quality, and can improve the deformation resistance of arc working copper plate of flat ingot crystallizer, greatly extend the service life of working copper plate, and also has the advantages of reducing electroslag remelting power consumption.

Description

Technical Field

[0001] This utility model belongs to the technical field of electroslag remelting flat ingot crystallizers in the metallurgical industry, and particularly relates to a combined flat ingot crystallizer composed of an arc-shaped working copper plate. Background Technology

[0002] The electroslag remelting flat ingot crystallizer is an essential piece of equipment for producing electroslag flat steel ingots using an electroslag furnace. In the production process, factories typically use flat ingot crystallizers with a rectangular inner cavity. The corners are usually right-angled or have small rounded corners, with a corner radius r typically less than 20mm, hence the name rectangular flat ingot crystallizer. This type of rectangular flat ingot crystallizer has the following problems:

[0003] (1) The commonly used rectangular flat ingot crystallizer has too much cooling intensity at the corner, especially at the deep right-angle corner, where the cooling intensity is even greater. This is because at the corner, the working copper plate is in the 90° angle area, and the cooling water outside the working copper plate simultaneously provides sufficient cooling capacity to the high-temperature slag liquid and metal solution inside the angle from both sides of the angle. However, two problems exist simultaneously in this corner area: First, the 90° corner area is farthest from the heating center of the electrode arc in the flat ingot crystallizer. The heat generated by the electrode during electroslag remelting is transferred to the corner slowly, and the heat lost in the corner area cannot be replenished in time. Second, the electromagnetic stirring effect generated by the electrode during electroslag remelting is also greatly reduced in the corner area. The corner area forms a 90° dead zone, which prevents the slag liquid from flowing smoothly along the working copper plate. This makes it difficult for the heat of the high-temperature slag liquid to be effectively transferred to the 90° corner area, which can easily lead to a low slag temperature. During the electroslag remelting of flat ingots, the excessive cooling intensity at the corner reduces the solidification quality of the corner, resulting in metallurgical defects such as slag inclusions, wavy patterns, and serrated grooves. Subsequent processes have increased a lot of extra workload, which not only consumes manpower and resources but also delays the process time and reduces production efficiency.

[0004] To overcome this defect, some companies have increased the smelting power to raise the corner slag temperature. This process can improve the solidification defects at the corners, but it also brings new problems: increasing the corner slag temperature by increasing the smelting power not only requires additional energy but also inevitably increases the electrode melting rate, causing the temperature of the slag liquid and molten metal in the center of the flat ingot crystallizer to rise, slowing down the solidification rate and leading to metallurgical quality problems such as segregation and coarse grains. At the same time, excessively increasing the slag temperature can also seriously affect the service life of the working copper plate, reducing its lifespan.

[0005] (2) During the smelting process of the flat ingot crystallizer, the high-temperature side of the working copper plate is in a high-temperature working state for a long time, with the surface temperature of the copper plate reaching as high as 1700 degrees Celsius. Meanwhile, the other side of the copper plate is cooled by cooling water, the temperature of which is usually below 60 degrees Celsius, and the surface temperature of the copper plate is usually below 80 degrees Celsius. There is a temperature difference of 1600 degrees Celsius between the two sides of the copper plate. The thermal expansion of the high-temperature side is much greater than that of the low-temperature side. This will create huge stress inside the copper plate, causing it to bulge towards the high-temperature side. The commonly used flat working copper plate does not have the ability to resist this deformation. After a short period of time, the working copper plate of the flat ingot crystallizer will be deformed, thus affecting the normal production of the flat ingot crystallizer.

[0006] (3). Patent No. ZL202421658375.2 discloses an elliptical flat ingot crystallizer, including two semi-circular crystallizers and two plate crystallizers. The semi-circular crystallizer is composed of a semi-circular crystallizer copper plate, a semi-circular crystallizer shell, a semi-circular crystallizer top plate, a semi-circular crystallizer bottom plate, a semi-circular crystallizer connecting rib plate, a semi-circular crystallizer water inlet pipe, and a semi-circular crystallizer water outlet pipe welded together. This structure can be combined into an electroslag remelting round ingot crystallizer and a flat ingot crystallizer, and also solves the problem of low solidification temperature at the corners, which can improve the solidification quality at the corners. However, the shortcomings are: (3.1). The flat ingot crystallizer of this structure is expensive due to its complex structure. (3.2). In addition to the semi-circular working copper plates at both ends, the working copper plate of the middle connecting module is still a flat copper plate. During the electroslag remelting process, this working copper plate is easily deformed. (3.3). This type of flat ingot crystallizer has four independent modules and many connection points. Each time it is smelted or demolded, the two semi-circular crystallizers and the two plate crystallizers must be connected or loosened with bolts, which makes the operation complicated. Each demolding requires disassembly and assembly, which is a large workload and has low work efficiency. Utility Model Content

[0007] The purpose of this invention is to overcome the defects of the existing technology and provide a combined flat ingot crystallizer composed of an arc-shaped working copper plate.

[0008] This invention plays an important role in overcoming solidification defects caused by the extremely uneven temperature field distribution in the corner of the strong cooling area of ​​the rectangular flat ingot crystallizer, and in overcoming the deformation of the wide copper plate in the flat ingot crystallizer. When used in the field of electroslag remelting flat ingot technology to produce electroslag flat ingots, it can reduce quality accidents and lower production costs.

[0009] The present invention adopts the following technical solution:

[0010] A combined flat ingot crystallizer composed of arc-shaped working copper plates includes two mirror-symmetrical flat ingot crystallizer half-modules, module I and module II, divided by their thickness. The inner cavities of both module I and module II are composed of arc-shaped working copper plates. Each arc-shaped working copper plate consists of three segments of different curved arc-shaped working copper plates. The two ends of each arc-shaped working copper plate are circular arc working copper plates with a radius of R and an arc length of [missing information]. The arc segment. The middle part of the bow-shaped working copper plate is an arc working copper plate with a radius of 5 times R and a length of (2-4)R. The two ends of the arc working copper plate with a radius of 5 times R are connected by arc working copper plates with a radius of R, which together form a smoothly transitioned bow-shaped working copper plate.

[0011] Furthermore, R can be set to 200mm-400mm.

[0012] Furthermore, the flat ingot crystallizer semi-module I is welded together from an arc-shaped working copper plate, an upper top plate, a lower bottom plate, vertical stiffeners, intermediate stiffeners, a connecting plate, a water distribution tank, a water collection tank, and a water tank guide plate. The water tank guide plate has the same structure as the bow-shaped working copper plate, and they are arranged parallel to each other. The top plate is welded to the water collection tank. The tops of both the bow-shaped working copper plate and the water tank guide plate are welded to the water collection tank. The upper outlet formed by the bow-shaped working copper plate and the water tank guide plate communicates with the interior of the water collection tank. The water distribution tank is welded to the lower bottom plate. The bottoms of both the water tank guide plate and the bow-shaped working copper plate are welded to the water distribution tank. The lower outlet formed by the water tank guide plate and the bow-shaped working copper plate communicates with the interior of the water distribution tank. The two outlets on both sides of the water tank guide plate and the bow-shaped working copper plate are welded to two connecting plates respectively. The water tank guide plate, the bow-shaped working copper plate, the top plate, the lower bottom plate, the water distribution tank, the water collection tank, and the connecting plates form a cooling water channel with the same shape as the bow-shaped working copper plate. The flat ingot crystallizer semi-module I and the flat ingot crystallizer semi-module II have the same structure.

[0013] Furthermore, a central water tank is installed horizontally in the middle of the arc-shaped working copper plate and the water tank guide plate, dividing the cooling water channel into two sections. The central water tank has evenly distributed holes. Two vertical stiffening plates are welded to the middle of the water tank guide plate, and a middle stiffening plate is welded to the middle of the water tank guide plate. This middle stiffening plate divides the central water tank into upper and lower parts, and has holes for water flow between the upper and lower parts of the central water tank.

[0014] Furthermore, an inlet pipe is installed on the water distribution tank, and an outlet pipe is installed on the water collection tank. When the combined flat ingot crystallizer composed of bow-shaped working copper plates is working, cooling water enters the water distribution tank from the inlet pipes of the flat ingot crystallizer half-module I and the flat ingot crystallizer half-module II, respectively, and flows upward along the cooling water channel into the water collection tank. Then, it is introduced into the drain pipe from the water collection tank, forming a bow-shaped cooling water channel that is exactly the same as the bow-shaped working copper plate, so as to uniformly cool the two bow-shaped working copper plates.

[0015] Furthermore, the connecting plates on the flat ingot crystallizer half-module I and the flat ingot crystallizer half-module II are provided with corresponding bolt holes. The flat ingot crystallizer half-module I and the flat ingot crystallizer half-module II are connected by bolts passing through the bolt holes on the connecting plates. The corresponding working copper plates on the flat ingot crystallizer half-module I and the flat ingot crystallizer half-module II are combined to form an elliptical electroslag remelting flat ingot melting cavity. The inner cavity thickness of the electroslag remelting flat ingot crystallizer is greater than 2R, and the inner cavity width is 2R+(2-4)R. The width-to-thickness ratio of the obtained flat ingot is 2-3:1, and the height H of the flat ingot is set as needed.

[0016] The beneficial effects of this utility model are:

[0017] (1) Because the corner of the combined flat ingot crystallizer of this utility model is changed from a right-angled corner to a rounded corner, the cooling intensity of each point on the rounded cross-section of the corner is basically the same. Compared with the right-angled corner of the conventional flat ingot crystallizer, the strong cooling area at the corner of this combined flat ingot crystallizer is completely eliminated, and there is no corner overcooling phenomenon caused by the strong cooling area at the corner. The distance between the electrode edge and each point of the rounded copper plate at the corner of the combined flat ingot crystallizer is basically the same. During the smelting process, the high temperature heat energy in the center of the crystallizer is transferred to the rounded copper plate at the corner by a shorter distance than it is transferred to the corner of the right-angled crystallizer, thus improving the heat transfer efficiency. The elimination of the right-angled corner strengthens the electromagnetic stirring effect during the electroslag remelting process. Under the action of electromagnetic force, the high temperature slag liquid can rotate smoothly along the surface of the smooth bow-shaped working copper plate of the combined flat ingot crystallizer, and evenly transfer the high temperature heat near the electrode to each part of the molten pool of the combined flat ingot crystallizer, creating better conditions for the solidification process. Under these conditions, the electroslag flat ingots produced exhibit a smooth semi-circular transition shape at both ends. The edges of the flat ingots change from conventional rectangular right-angled edges to semi-circular large arc edges, preventing metallurgical defects such as slag inclusions, wavy grooves, and serrated grooves from occurring in the corner areas.

[0018] (2). The deformation resistance of the bow-shaped working copper plate in the combined flat ingot crystallizer is greatly improved because the bow-shaped working copper plate changes from a planar structure to a circular arc structure. The corner of the inner cavity of the combined flat ingot crystallizer is composed of two circular arc working copper plates with a radius of R. These two circular arc working copper plates have extremely strong deformation resistance, which makes the width of the middle copper plate narrower to L=W-2R, where W is the total width of the inner cavity of the working copper plate of the flat ingot crystallizer, and L is the width of the middle part of the copper plate after subtracting the width of the two circular arc radii R. In addition, the middle copper plate is also set as a circular arc micro-arch structure. This part of the micro-arch structure copper plate also has strong deformation resistance and can resist the tendency of the bow-shaped working copper plate to deform towards the center of the combined flat ingot crystallizer under high temperature conditions, which can ensure that the service life of the flat ingot crystallizer is greatly extended.

[0019] (3) The flat ingot crystallizer composed of an arc-shaped working copper plate is divided into two half-modules with symmetrical thickness. The thickness of the two half-modules after division is only half the thickness of the flat ingot crystallizer before division, forming a combined flat ingot crystallizer. During use, simply tightening the connecting bolts on the connecting plates of the two flat ingot crystallizer half-modules allows for electroslag remelting smelting operations, and loosening the connecting bolts on the connecting plates of the two flat ingot crystallizer half-modules allows for demolding operations. The operation is very convenient and simpler, more convenient, and more reliable than the technology of ZL202421658375.2. The function of the vertical stiffener and the intermediate stiffener is to further strengthen the rigidity of the working copper plate in the length and width directions, and increase the deformation resistance of the working copper plate in the length and width directions.

[0020] Note: The width is symmetrically divided into two halves of a whole flat ingot crystallizer, which is divided downwards along the height from the width center line.

[0021] Thickness splitting refers to dividing a whole flat ingot crystallizer into two half modules along the height from the thickness center line downwards. Attached Figure Description

[0022] Figure 1 This is the front view of the present invention;

[0023] Figure 2 This is a side view of the present invention;

[0024] Figure 3 This is a top view of the present invention;

[0025] Figure 4 This is a top view of a conventional flat ingot crystallizer for melting.

[0026] Figure 5 This is a top view of the smelting process of this utility model.

[0027] In the diagram: 1-Top plate, 2-Bottom plate, 3-Water tank guide plate, 4-Arch-shaped working copper plate, 5-Intermediate stiffener plate, 6-Water distribution tank, 7-Water collection tank, 8-Drainage pipe, 9-Water supply pipe, 10-Vertical stiffener plate, 11-Connecting plate, 12-Bolt hole, 13-Cooling water channel, 14-Central water tank;

[0028] A-flat ingot crystallizer half-module I, B-flat ingot crystallizer half-module II;

[0029] 1000 - Melting cavity of conventional flat ingot crystallizer, 1001 - Electrode of conventional flat ingot crystallizer, 1002 - Cooling water channel of conventional flat ingot crystallizer, 1003 - Working copper plate of conventional flat ingot crystallizer, 1004 - Strong cooling zone of conventional flat ingot crystallizer, 1005 - Conventional flat ingot crystallizer;

[0030] 2000 - The melting cavity of this utility model; 2001 - The electrode of this utility model; 2002 - The cooling water channel of this utility model; 2003 - The working copper plate of this utility model; 2004 - The flat ingot crystallizer of this utility model. Detailed Implementation

[0031] To make the objectives, technical solutions, and advantages of this utility model clearer, the technical solutions of this utility model are described clearly and completely below. Obviously, the described embodiments are only some embodiments of this utility model, not all embodiments. Based on the embodiments of this utility model, all other embodiments obtained by those skilled in the art without creative effort are within the protection scope of this utility model.

[0032] The working principle of this invention is as follows: By changing the right-angled corners of the flat ingot crystallizer to rounded corners, the strong cooling zone at the corners of the crystallizer is eliminated, the electromagnetic stirring effect is improved, and the uniformity of slag temperature during electroslag remelting is enhanced, thereby improving solidification quality. Simultaneously, the simplified structure achieved through the use of a thickness-partitioned design not only simplifies operation but also facilitates demolding. The arc-shaped working copper plate utilizes a fully arc-shaped structure, significantly improving its resistance to deformation and extending the service life of the crystallizer.

[0033] like Figure 1 , Figure 2 As shown, this utility model discloses a combined flat ingot crystallizer composed of an arc-shaped working copper plate, comprising two mirror-symmetrical flat ingot crystallizer half-modules IA and IIB, which are divided according to their thickness.

[0034] The flat ingot crystallizer semi-module IA is welded together from the following components: bow-shaped working copper plate 4, upper top plate 1, lower bottom plate 2, vertical stiffener plate 10, intermediate stiffener plate 5, connecting plate 11, water distribution tank 6, water collection tank 7, and water tank guide plate 3.

[0035] The bow-shaped working copper plate 4 is composed of three working copper plates with different curved arc shapes. The two ends of the bow-shaped working copper plate 4 are arc-shaped working copper plates with a radius of R and an arc length of [missing information]. The arc segment is a 1 / 4 arc of a circle with an arc length equal to the radius R (R is 200mm-400mm). The middle part of the bow-shaped working copper plate 4 is a circular arc working copper plate with a radius of 5 times R and a length of (2-4)R. The two ends of the circular arc working copper plate with a radius of 5 times R are circular arc working copper plates with a radius of R. They are connected to form a smoothly transitioned bow-shaped working copper plate 4, as shown. Figure 3 As shown, the bow-shaped working copper plate 4 has a bow-shaped structure.

[0036] The water tank guide plate 3 and the bow-shaped working copper plate 4 have the same structure. The water tank guide plate 3 and the bow-shaped working copper plate 4 are arranged parallel to each other. The upper top plate 1 is welded to the water collection tank 7. The tops of both the bow-shaped working copper plate 4 and the water tank guide plate 3 are welded to the water collection tank 7. The upper outlet formed by the bow-shaped working copper plate 4 and the water tank guide plate 3 communicates with the interior of the water collection tank 7. The water distribution tank 6 is welded to the lower bottom plate 2. The bottoms of both the water tank guide plate 3 and the bow-shaped working copper plate 4 are welded to the water distribution tank 6. The lower outlet formed by the water tank guide plate 3 and the bow-shaped working copper plate 4 communicates with the interior of the water distribution tank 6. The two outlets on both sides of the water tank guide plate 3 and the bow-shaped working copper plate 4 are respectively welded to two connecting plates 11. Thus, the water tank guide plate 3, the bow-shaped working copper plate 4, the upper top plate 1, the lower bottom plate 2, the water distribution tank 6, the water collection tank 7, and the connecting plates 11 form a cooling water channel 13 with the same shape as the bow-shaped working copper plate 4. Figure 3 As shown, the horizontal cross-sectional structure of the cooling water channel 13 is the same as that of the bow-shaped working copper plate 4.

[0037] A central water tank 14 is installed in the middle of the horizontal direction of the arc-shaped working copper plate 4 and the water tank guide plate 3, which divides the cooling water channel 13 into two sections. Holes are evenly distributed on the central water tank 14.

[0038] Two vertical stiffeners 10 are welded to the middle of the water tank guide plate 3. An intermediate stiffener 5 is welded to the middle of the water tank guide plate 3. The intermediate stiffener 5 divides the middle water tank 14 into upper and lower parts. There are holes on the intermediate stiffener 5 to allow water to flow between the upper and lower parts of the middle water tank 14.

[0039] A water inlet pipe 9 is installed on the water distribution tank 6, and a water outlet pipe 8 is installed on the water collection tank 7. When the combined flat ingot crystallizer composed of bow-shaped working copper plates is working, the cooling water enters the water distribution tank 6 from the water inlet pipes 9 of the flat ingot crystallizer half module IA and the flat ingot crystallizer half module IIB, respectively, and flows upward along the cooling water channel 13 into the lower part of the middle water tank 14. Then it enters the upper part of the middle water tank 14 through the hole of the middle rib plate 5, and then enters the upper cooling water channel 13 into the water collection tank 7. Finally, it is introduced into the drain pipe 8 from the water collection tank 7, forming a bow-shaped cooling water channel 13 that is exactly the same as the bow-shaped working copper plate 4, so as to uniformly cool the two bow-shaped working copper plates 4. The combined flat ingot crystallizer composed of the bow-shaped working copper plate 4 has no right-angle corners. Not only are the angled areas completely smooth transitioned with large arcs, but the three sections of the working copper plate 4 are different curved arcs, forming a smooth transition. This not only greatly improves the deformation resistance of the bow-shaped working copper plate, but also makes the cooling intensity of the bow-shaped working copper plate more uniform, effectively improving the solidification quality at various points of the flat ingot crystallizer, especially the right-angled corners of the original flat ingot crystallizer.

[0040] The connecting plates 11 on the half-modules IA and IIB of the flat ingot crystallizer have corresponding bolt holes 12. Bolts passing through these bolt holes 12 connect the half-modules IA and IIB, resulting in a complete composite flat ingot crystallizer composed of arc-shaped working copper plates 4. The corresponding working copper plates 4 on the half-modules IA and IIB combine to form an elliptical electroslag remelting flat ingot melting cavity. As described above, the inner cavity of the electroslag remelting flat ingot crystallizer has a slightly arched shape (e.g., the middle section of the arc-shaped working copper plate 4 is a circular arc working copper plate with a radius of 5 times R) due to the arc shape of the L-segment copper plate. Figure 3 As shown, the thickness is slightly greater than 2R, the width of the inner cavity is 2R+(2-4)R, and the width-to-thickness ratio of the resulting flat ingot is 2-3:1. The height H of the flat ingot can be determined as needed.

[0041] The bow-shaped working copper plate 4 is formed by cold bending.

[0042] The combined flat ingot crystallizer composed of the bow-shaped working copper plate 4 can not only solve the quality problem of the corners in the process of flat ingot electroslag remelting, but also extend the service life of the combined flat ingot crystallizer, reduce energy consumption, and is easy to use, which is very beneficial to the production of flat ingot electroslag remelting.

[0043] The working principle of this utility model is as follows:

[0044] First, the flat ingot crystallizer half-module IA and flat ingot crystallizer half-module IIB are connected and fixed with bolts. Cooling circulating water is introduced, entering the water distribution tank 6 through the water supply pipe 9, then entering the lower part of the middle water tank 14 through the cooling water channel 13, then entering the upper part of the middle water tank 14 through the hole of the intermediate stiffener 5, then entering the upper cooling water channel 13, and flowing into the water collection tank 7. Under the condition of the reinforced structure of the intermediate stiffener 5, the flow is uniform and enters the water collection tank 7. Finally, the water is discharged through the drain pipe 8. Electroslag material is placed in the melting cavity 2000 of this utility model, which is surrounded by the flat ingot crystallizer half-module IA and flat ingot crystallizer half-module IIB. Then, the electrode 2001 is inserted into the melting cavity 2000. The electrode is energized according to a certain process procedure to enter the electroslag remelting process control process. Due to the structure of this utility model, metallurgical defects such as slag inclusions, corrugated grooves, and sawtooth grooves will not appear on the arc cross-section.

[0045] Compared with the prior art, this utility model has the following advantages:

[0046] like Figure 4As shown in the figure, 1000 is the melting cavity of a conventional flat ingot crystallizer, 1001 is the electrode of a conventional flat ingot crystallizer, 1002 is the cooling water channel of a conventional flat ingot crystallizer, 1003 is the working copper plate of a conventional flat ingot crystallizer, 1004 is the strong cooling zone of a conventional flat ingot crystallizer, and 1005 is the conventional flat ingot crystallizer.

[0047] like Figure 5 As shown in the figure, 2000 represents the melting cavity of this invention, 2001 represents the electrode of this invention, 2002 represents the cooling water channel of this invention, 2003 represents the working copper plate of this invention, and 2004 represents the flat ingot crystallizer of this invention. Figure 4 , Figure 5 The comparison reveals the following points: 1. Figure 4 The conventional flat ingot crystallizer, specifically the right-angled corner (i.e., the strong cooling zone 1004), exhibits a localized area of ​​intense cooling. The cooling water channel 1002 of the conventional flat ingot crystallizer provides excess cooling to the two adjacent right-angled sides of the corner. Furthermore, the area enclosed by these two right-angled sides is relatively small. The molten metal in this area retains more heat, making it more prone to premature solidification than other parts of the conventional flat ingot crystallizer, resulting in irregular surface quality—the corner defect. Figure 5 The utility model flat ingot crystallizer shown has no right angles and no strong cooling area. The cooling intensity is uniform at all points on the cross-section of the flat ingot crystallizer, and the solidification quality is stable.

[0048] 2. Figure 4 and Figure 5 The melting cavity and electrodes shown in the diagram have identical external dimensions. However, the distance from the corner of the electrode to the right-angle corner of a conventional flat ingot crystallizer differs significantly from the distance at the same location in the novel flat ingot crystallizer. The distance from the corner of electrode 1001 in a conventional flat ingot crystallizer to the corner of the strong cooling zone 1004 is much greater than the distance from the corner of electrode 2001 in this invention to the working copper plate 2003 in the same direction and location. In other words, the distance from the corner of the electrode in this novel flat ingot crystallizer to the working copper plate at the corner is much shorter than the distance from the corner of the electrode in a conventional flat ingot crystallizer to the corner of the strong cooling zone. This greatly improves the cooling conditions in the corner area and eliminates the strong cooling zone formed by the right-angle corner. The farther the electrode is from the flat ingot crystallizer, the less heat generated by the electric arc during electroslag remelting is transferred to the corresponding corner. This is more detrimental to the strong cooling zone of the conventional flat ingot crystallizer, making it more prone to solidification defects due to excessive cooling and insufficient heat at the corner.

[0049] 3. Figure 4 The working copper plate 1003 of the conventional flat ingot crystallizer shown is flat and easily deformed under high-temperature operating conditions. Figure 5The working copper plate 2003 of this utility model is an arc-shaped working copper plate composed of different arc segments. It has a strong resistance to high temperature deformation, significantly extends service life, and greatly reduces maintenance workload.

[0050] Finally, it should be noted that the above embodiments are only used to illustrate the technical solutions of this utility model, and not to limit it. Although this utility model has been described in detail with reference to the foregoing embodiments, those skilled in the art should understand that modifications can still be made to the technical solutions described in the foregoing embodiments, or equivalent substitutions can be made to some of the technical features. Such modifications or substitutions do not cause the essence of the corresponding technical solutions to deviate from the spirit and scope of the technical solutions of the embodiments of this utility model.

Claims

1. A combined flat ingot crystallizer composed of an arc-shaped working copper plate, characterized in that, The system comprises two mirror-symmetrical flat ingot crystallizer half-modules, module I and module II, divided by thickness. Both modules have an inner cavity composed of an arc-shaped working copper plate. Each arc-shaped working copper plate consists of three segments of different curved, arc-shaped working copper plates. The two ends of each arc-shaped working copper plate are circular arc working copper plates with a radius of R and an arc length of [missing information]. The arc segment, the middle part of the bow-shaped working copper plate is an arc working copper plate with a radius of 5 times R and a length of (2-4)R. The arc working copper plate with a radius of 5 times is connected to the arc working copper plates with radii of R at both ends, and they form a smoothly transitioned bow-shaped working copper plate.

2. The combined flat ingot crystallizer composed of an arc-shaped working copper plate according to claim 1, characterized in that, R can be 200mm-400mm.

3. The combined flat ingot crystallizer composed of an arc-shaped working copper plate according to claim 1, characterized in that, The flat ingot crystallizer semi-module I is welded together from an arc-shaped working copper plate, an upper top plate, a lower bottom plate, vertical stiffeners, intermediate stiffeners, a connecting plate, a water distribution tank, a water collection tank, and a water tank guide plate. The water tank guide plate has the same structure as the arc-shaped working copper plate and is arranged parallel to it. The upper top plate is welded onto the water collection tank. The tops of both the arc-shaped working copper plate and the water tank guide plate are welded onto the water collection tank. The upper outlet formed by the arc-shaped working copper plate and the water tank guide plate connects to the interior of the water collection tank. The water distribution tank is welded to the bottom plate. The bottom of the water tank guide plate and the bow-shaped working copper plate are both welded to the water distribution tank. The lower outlet formed by the water tank guide plate and the bow-shaped working copper plate is connected to the inside of the water distribution tank. The two outlets on both sides of the water tank guide plate and the bow-shaped working copper plate are welded to two connecting plates respectively. The water tank guide plate, the bow-shaped working copper plate, the top plate, the bottom plate, the water distribution tank, the water collection tank and the connecting plates form a cooling water channel with the same shape as the bow-shaped working copper plate.

4. The combined flat ingot crystallizer composed of an arc-shaped working copper plate according to claim 3, characterized in that, A central water tank is installed in the horizontal middle of the arc-shaped working copper plate and the water tank guide plate, dividing the cooling water channel into two sections. The central water tank has evenly distributed holes. Two vertical stiffeners are welded in the middle of the water tank guide plate. An intermediate stiffener is welded in the middle of the water tank guide plate, dividing the central water tank into upper and lower parts. The intermediate stiffener has holes for water to flow between the upper and lower parts of the central water tank.

5. The combined flat ingot crystallizer composed of an arc-shaped working copper plate according to claim 3, characterized in that, The water distribution tank is equipped with an inlet pipe, and the water collection tank is equipped with an outlet pipe.

6. The combined flat ingot crystallizer composed of an arc-shaped working copper plate according to claim 3, characterized in that, The connecting plates on the half-module I and half-module II of the flat ingot crystallizer have corresponding bolt holes. The half-module I and half-module II of the flat ingot crystallizer are connected by bolts passing through the bolt holes on the connecting plates. The corresponding working copper plates on the half-module I and half-module II of the flat ingot crystallizer are combined to form an elliptical electroslag remelting flat ingot melting cavity. The inner cavity thickness of the electroslag remelting flat ingot crystallizer is greater than 2R, and the inner cavity width is 2R+(2-4)R. The width-to-thickness ratio of the resulting flat ingot is 2-3:

1. The height H of the flat ingot is set as needed.

Images