Electroslag remelting combined slab crystallizer

Abstract

The utility model provides a kind of electric-shock remelting's slab ingot crystallizer, including two groups of mutually symmetrical setting by corrugated working copper plate and being formed slab ingot crystallizer half module;Two groups of mutually symmetrical setting slab ingot crystallizer half module left and right ends are each equipped with connecting plate, bolt hole is equipped on connecting plate, and two groups of symmetrical setting slab ingot crystallizer half module are fixedly connected by bolt hole, and constitute slab ingot crystallizer.Combination slab ingot crystallizer by corrugated working copper plate is formed, and the working copper plate in width direction is greatly improved due to using folding process, and the deformation resistance of wide copper plate is greatly improved.Wide copper plate is decomposed into 6 strip copper plates with width W / 6 due to using corrugated process, and the working copper plate of electric-shock remelting slab ingot crystallizer is formed into corrugated structure with high stability, and the adjacent copper plate of each strip copper plate is connected in the form of fold line.

Description

Technical Field

[0001] This utility model belongs to the field of metallurgical equipment, and in particular relates to an electroslag remelting combined flat ingot crystallizer. Background Technology

[0002] The electroslag remelting flat ingot crystallizer is an essential supporting equipment for the production of electroslag flat steel ingots in an electroslag furnace. During the production process, the working copper plate in the width direction of the flat ingot crystallizer presents the following problems:

[0003] During the smelting process in a flat ingot crystallizer, one side of the copper plate operates at a prolonged high temperature, reaching as high as 1700 degrees Celsius. The other side, however, is cooled by water at a temperature typically below 60 degrees Celsius, keeping the copper plate's surface temperature below 100 degrees Celsius. This 1600-degree Celsius temperature difference, with the thermal expansion of the higher-temperature side far exceeding that of the lower-temperature side, creates immense internal stress that causes the copper plate to bend towards the higher-temperature side. The planar shape of the copper plate cannot resist this deformation, especially along the width of the flat ingot crystallizer, which is typically wider than 800 mm and approximately 2000 mm high. This extreme stress causes the copper plate to bend towards the center of the crystallizer. Over time, this results in severe deformation of the working copper plate, making demolding difficult, increasing maintenance workload, and even rendering the crystallizer unusable, thus impacting the normal production of electroslag remelted flat ingots of special metal materials. Generally, the wider the working copper plate, the greater the total deformation of the copper plate, and the easier it is to deform. Conversely, the narrower the copper plate, the smaller the total deformation of the copper plate, and the less likely it is to deform. Utility Model Content

[0004] The purpose of this invention is to solve the problem of deformation of wide copper plates in the prior art.

[0005] To achieve the above objectives, the present invention adopts the following technical solution:

[0006] A combined flat ingot crystallizer for electroslag remelting includes two sets of flat ingot crystallizer half-modules symmetrically arranged from corrugated working copper plates; each of the two sets of flat ingot crystallizer half-modules has a connecting plate at both ends, and bolt holes are provided on the connecting plate. The two sets of symmetrically arranged flat ingot crystallizer half-modules are fixedly connected through the bolt holes to form a flat ingot crystallizer.

[0007] Furthermore, the corrugated working copper plate is composed of eight sections of cold-bent copper plates; the two ends of the corrugated working copper plate are cold-bent to form narrow sides with a height of D / 2; the middle part is divided into six strip copper plates with a width of W / 6 by cold bending, among which the copper plate with a width of L is pressed into a corrugated copper plate with an included angle α of 165°~170°, and the rest are flat copper plates connected to the narrow sides, with an included angle β of 172.5°~175° between the corrugated copper plate and the flat copper plate.

[0008] Furthermore, the width W ranges from 800mm to 1300mm, the width L ranges from 500mm to 900mm, and the thickness of the corrugated working copper plate ranges from 360mm to 600mm.

[0009] Furthermore, an upper top plate is provided at the upper end of the corrugated working copper plate, and a lower bottom plate is provided at the lower end of the corrugated working copper plate. Two vertical ribs are provided at the two minor axis positions of the cross section of the corrugated working copper plate, parallel to the axial direction of the corrugated working copper plate. A horizontal intermediate rib is provided vertically at the center of the two vertical ribs. The intermediate rib and the vertical ribs form a cross structure. The intermediate rib is provided around the radial outer surface of the working copper plate.

[0010] Furthermore, water collection tanks are respectively installed on the lower surfaces of the top plate and the middle rib, and water distribution tanks are respectively installed on the upper surfaces of the bottom plate and the middle rib.

[0011] Furthermore, a water tank guide plate is provided on the outer surface of the corrugated working copper plate. The upper end of the water tank guide plate is connected to the water collection tank on the lower surface of the upper top plate, the lower end of the water tank guide plate is connected to the water distribution tank on the upper surface of the lower bottom plate, and the two ends of the water tank guide plate are connected to the vertical stiffener plate.

[0012] Furthermore, the water tank guide plate, corrugated working copper plate, upper top plate, and lower bottom plate form a cooling water channel with the same shape as the corrugated working copper plate.

[0013] The beneficial effects of this utility model are:

[0014] 1. In the width direction, deformation of the copper plate in a flat ingot crystallizer generally occurs in the central part of the wide copper plate within the melting cavity of the flat ingot crystallizer. Because the middle part of the corrugated working copper plate is decomposed into six strip copper plates, each with a width of W / 6, and the four central strip copper plates are corrugated, the expansion towards the center of the crystallizer caused by the high temperature on each corrugated copper plate is reduced by a factor of six, which is negligible. Simultaneously, the increased stiffness of the strip copper plates in the width direction enhances their resistance to deformation in that direction, further improving the copper plate's resistance to deformation in the width direction.

[0015] 2. The strip copper plates are connected by zigzag lines, which serve as thermal expansion isolation. The expansion force of each strip copper plate is not in the same direction in the width direction. There is a certain angle α or β between any corrugated strip copper plate and the adjacent narrow strip copper plate. Their expansion forces cannot form a resultant force and can cancel each other out. This greatly reduces the expansion force of the copper plate in the width direction and significantly reduces the expansion amount. It will not affect the deformation of the working copper plate of the flat ingot crystallizer W width in the width direction.

[0016] 3. In the height direction, the corrugated structure is also formed due to the folding effect between the copper strips. Because of the folding effect, the expansion force of each corrugated copper strip has an angle α or β, resulting in the following changes in thermal expansion force and deformation capacity compared to a flat copper plate at high temperatures:

[0017] First, the corrugated structure of wide copper plates is distributed vertically along the height direction, and its bending strength also increases the most along the vertical direction. The fundamental reason is that the α or β angle has the effect of strengthening the bending ability of the copper plate. The larger the α or β angle, the weaker the bending ability, and vice versa.

[0018] Because the corrugated copper plate is tilted at an angle α or β to the plane of the wide copper plate and is set in the opposite direction to the adjacent corrugated copper plate, when an external force is applied to the corrugated copper plate, the force will be decomposed into a force perpendicular to the plane of the copper plate and a horizontal component. A portion of the horizontal component parallel to the plane of the copper plate will be canceled out by the horizontal component in the opposite direction generated by the adjacent corrugated copper plate. The vertical force acting on the plane of the wide copper plate will be reduced. Therefore, the corrugated copper plate structure has a stronger resistance to deformation in the inner cavity of the flat ingot crystallizer than the flat wide copper plate. It can resist the tendency of the copper plate to deform towards the center of the flat ingot crystallizer under high temperature conditions, ensuring that the service life of the flat ingot crystallizer is greatly extended. Attached Figure Description

[0019] Figure 1 This is a front view of the electroslag remelting combined flat ingot crystallizer provided by this utility model;

[0020] Figure 2 This is a left view of the electroslag remelting combined flat ingot crystallizer of this utility model;

[0021] Figure 3 This is a top view of the electroslag remelting combined flat ingot crystallizer of this utility model.

[0022] Attached reference numerals: 1-Top plate, 2-Bottom plate, 3-Water tank guide plate, 4-Corrugated 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-Box body, 15-Smelting cavity, 16-Corrugated transition point, 17-Narrow side. Detailed Implementation

[0023] To further understand the invention content, features and effects of this utility model, the following embodiments are provided, and detailed descriptions are given in conjunction with the accompanying drawings.

[0024] The structure of this utility model will now be described in detail with reference to the accompanying drawings.

[0025] Please refer to Figure 1 An electroslag remelting flat ingot crystallizer includes two sets of flat ingot crystallizer half-modules symmetrically arranged and composed of corrugated working copper plates 4. Both ends of the two sets of flat ingot crystallizer half-modules are provided with connecting plates 11, and bolt holes 12 are provided on the connecting plates 11. The two sets of flat ingot crystallizer half-modules are fixedly connected through the bolt holes 12 to form a complete flat ingot crystallizer.

[0026] The corrugated working copper plates 4 on the two sets of symmetrically arranged flat ingot crystallizer half-modules are completely identical in size. Each corrugated working copper plate 4 consists of eight working copper plates of different widths. The boundary line between any two corrugated copper plates is the corrugated transition point 16. The eight working copper plates of different widths are pressed into a single copper plate by cold bending. The two ends of the corrugated working copper plate 4 are formed into narrow sides 17 with a height of D / 2 by cold bending. The middle of the corrugated working copper plate 4 is divided into six strip copper plates with a width of W / 6 by cold bending. Among the six strip copper plates, the copper plate with a width of L is pressed into a corrugated copper plate with an included angle α of 165°~170°. The corrugated design not only increases the surface area of ​​the copper plate, which helps heat dissipation, but also improves the overall strength of the copper plate. The rest are flat copper plates and are connected to the narrow sides 17. The included angle β between the corrugated copper plates and the flat copper plates is 172.5°~175°. The two ends of the corrugated working copper plate 4 are cold-bent into two narrow sides 17 perpendicular to the width plane of the corrugated working copper plate 4. These serve as working copper plates in the thickness direction of the smelting cavity 15 of the flat ingot crystallizer semi-module. The height of the narrow side 17 is D / 2. The width of the corrugated working copper plate 4 is W. The corrugated working copper plate 4 with a width of W is divided into six strip copper plates of the same width by cold bending. Each strip copper plate has a width of W / 6. The copper plate with a width of L in the middle is pressed into a wavy corrugated copper plate. The other two copper plates connected to the corrugated copper plate and the narrow side 17 have a width of W / 6. These two copper plates are flat and are connected to the four corrugated copper plates with a width of W / 6 to form the working copper plates in the width direction of the flat ingot crystallizer cavity.

[0027] like Figure 3 As shown, there is an included angle α between the four corrugated copper plates, with an angle of 165°~170°, and the included angle β between the corrugated copper plate and the two adjacent flat copper plates, with an angle of 172.5°~175°.

[0028] A top plate 1 is provided at the upper end of the corrugated working copper plate 4, and a bottom plate 2 is provided at the lower end of the corrugated working copper plate 4. Two vertical ribs 10 are arranged parallel to the axial direction of the corrugated working copper plate 4 at two minor axis positions of the cross section. A horizontal intermediate rib 5 is vertically arranged at the center of the two vertical ribs 10, forming a cross structure with the vertical ribs 10. The intermediate rib 5 is arranged around the radial outer surface of the working copper plate 4. Water collection tanks 7 are respectively provided on the lower surface of the top plate 1 and the intermediate rib 5, and water distribution tanks 6 are respectively provided on the upper surface of the bottom plate 2 and the intermediate rib 5. A water tank guide plate 3 is provided on the outer surface of the corrugated working copper plate 4. The upper end of the water tank guide plate 3 is connected to the water collection tank 7 on the lower surface of the top plate 1, and the lower end of the water tank guide plate 3 is connected to the water distribution tank 6 on the upper surface of the bottom plate 2. The two ends of the water tank guide plate 3 are connected to the vertical ribs 10. The water tank guide plate 3, together with the corrugated working copper plate 4, the upper top plate 1, and the lower bottom plate 2, form a cooling water channel 13 with the same shape as the corrugated working copper plate 4. The cross-section of the cooling water channel 13, corresponding to the width L of the corrugated working copper plate, also forms the same structure as the corrugated working copper plate. The cooling water channel 13 is an important condition for maintaining continuous cooling of the corrugated working copper plate under high-temperature operating conditions of the crystallizer.

[0029] The connecting plates 11 on the two sets of symmetrical flat ingot crystallizer half-modules are provided with symmetrical bolt holes 12. The connecting plates 11 have two important functions: first, they are welded together with the working copper plate 4, the upper top plate 1, the lower bottom plate 2, and the water tank guide plate 3 to form a stable box structure 14; second, the bolt holes of the two sets of crystallizer half-modules have the same size and dimensional tolerance. By passing bolts through the bolt holes 12 on the connecting plates 11 to connect the two sets of symmetrically arranged flat ingot crystallizer half-modules, a complete flat ingot crystallizer can be obtained. The two sets of symmetrically arranged flat ingot crystallizer half-modules form a melting cavity 15 with a width W, a thickness D, and a height H.

[0030] A drain pipe 8 is provided on the side of the water collection tank 7 on the lower surface of the upper top plate 1, and a water supply pipe 9 is provided on the side of the water distribution tank 6 on the upper surface of the lower bottom plate 2. When the flat ingot crystallizer is working, cooling water enters the water distribution tank 6 from the water inlet pipes 9 of the two sets of flat ingot crystallizer half modules, flows upward along the cooling water channel 13 into the water collection tank 7, and then is introduced into the drain pipe 8 from the water collection tank 7, forming a corrugated cooling water channel that is exactly the same as the corrugated working copper plate 4, so as to uniformly cool the corrugated working copper plate 4 of the two flat ingot crystallizers.

[0031] By connecting two sets of semi-modules consisting of corrugated working copper plates 4 and connecting them to cooling water, the electroslag remelting process of flat ingots of special metal materials can be carried out. The wide copper plates of this flat ingot crystallizer will not deform, demolding is convenient, and the service life can be significantly extended.

[0032] This invention uses a cold bending method to bend the working copper plate in the width direction of the flat ingot crystallizer into six very narrow strip copper plates. The strip copper plates have a certain included angle α or β between them, forming a wavy corrugated structure. The corrugated structure changes the working copper plate's resistance to thermal deformation, giving it extremely strong resistance to deformation in both the height and width directions. Furthermore, the shape of the smelted flat ingot remains basically flat, and the surface of the flat ingot has slight large wavy stripes, which will not have any adverse effect on subsequent rolling or forging processes.

[0033] The working principle of this utility model:

[0034] This novel design addresses the issue of wide working copper plates in electroslag remelting flat ingot crystallizers being prone to deformation. Based on the objective fact that the wider the copper plate, the greater the cumulative deformation at high temperatures, the design decomposes the wide copper plate into six narrow strips with zigzag lines using a cold bending process. The four middle strips are corrugated, ensuring that the plane orientation of any two adjacent strips is different. This decomposes the deformation direction of the copper plate at high temperatures into six distinct directions, preventing the formation of a combined force. Furthermore, the width of each strip is reduced to one-sixth of the original wide copper plate, significantly reducing the absolute expansion of each strip at high temperatures to a negligible level. Finally, the included angle α or β between the strips has the property of absorbing thermal expansion, allowing for the absorption of some of the thermal expansion at high temperatures.

[0035] The working copper plate of a flat ingot crystallizer manufactured in this way has a significantly longer service life than that of a crystallizer manufactured with a flat working copper plate.

[0036] The above description is only a preferred embodiment of the present utility model and is not intended to limit the present utility model in any way. Any simple modifications, equivalent changes and alterations made to the above embodiments based on the technical essence of the present utility model shall fall within the scope of the technical solution of the present utility model.

Claims

1. An electroslag remelting combined flat ingot crystallizer, characterized in that: It includes two sets of symmetrically arranged flat ingot crystallizer half-modules made of corrugated working copper plates; both ends of the two sets of symmetrically arranged flat ingot crystallizer half-modules are provided with connecting plates, and bolt holes are provided on the connecting plates. The two sets of symmetrically arranged flat ingot crystallizer half-modules are fixedly connected through the bolt holes to form a flat ingot crystallizer.

2. The electroslag remelting combined flat ingot crystallizer according to claim 1, characterized in that, The corrugated working copper plate is composed of eight sections of cold-bent copper plates. The two ends of the corrugated working copper plate are cold-bent to form narrow sides with a height of D / 2. The middle part is divided into six strip copper plates with a width of W / 6 by cold bending. Among them, the copper plate with a width of L is pressed into a corrugated copper plate with an included angle α of 165°~170°. The rest are flat copper plates and connected to the narrow sides. The included angle β between the corrugated copper plate and the flat copper plate is 172.5°~175°.

3. The electroslag remelting combined flat ingot crystallizer according to claim 2, characterized in that, The width W ranges from 800mm to 1300mm, the width L ranges from 500mm to 900mm, and the thickness of the corrugated working copper plate ranges from 360mm to 600mm.

4. The electroslag remelting combined flat ingot crystallizer according to claim 1, characterized in that, The corrugated working copper plate has an upper top plate at the upper end and a lower bottom plate at the lower end. Two vertical ribs are set at the two minor axis positions of the cross section of the corrugated working copper plate, parallel to the axial direction of the corrugated working copper plate. A horizontal intermediate rib is set vertically at the center of the two vertical ribs. The intermediate rib and the vertical ribs form a cross structure. The intermediate rib is set around the radial outer surface of the working copper plate.

5. The electroslag remelting combined flat ingot crystallizer according to claim 4, characterized in that, Water collection tanks are installed on the lower surfaces of the top plate and the middle rib plate, and water distribution tanks are installed on the upper surfaces of the bottom plate and the middle rib plate.

6. The electroslag remelting combined flat ingot crystallizer according to claim 4, characterized in that, The outer surface of the corrugated working copper plate is provided with a water tank guide plate. The upper end of the water tank guide plate is connected to the water collection tank on the lower surface of the upper top plate, the lower end of the water tank guide plate is connected to the water distribution tank on the upper surface of the lower bottom plate, and the two ends of the water tank guide plate are connected to the vertical stiffener plate.

7. The electroslag remelting combined flat ingot crystallizer according to claim 4, characterized in that, The water tank guide plate, corrugated working copper plate, upper top plate, and lower bottom plate form a cooling water channel with the same shape as the corrugated working copper plate.

Images