A narrow surface crystallizer copper plate and continuous casting crystallizer

Abstract

The present invention provides a narrow-face crystallizer copper plate and a continuous casting crystallizer, and relates to the field of continuous casting crystallizers. The narrow-face crystallizer copper plate includes a plate body and a strengthening layer attached to the surface of the plate body. The thickness of the strengthening layer of the middle working surface of the narrow-face crystallizer copper plate gradually increases along the direction from the upper end surface to the lower end surface, and the thickness of the strengthening layer of the side working surface gradually decreases along the direction from the side working surface to the middle working surface. The minimum thickness of the strengthening layer of the side working surface is greater than or equal to the thickness of the strengthening layer of the middle working surface. The above design can make the lower part and both sides of the lower part of the narrow-face crystallizer copper plate significantly thickened, which is more in line with the wear law of the narrow-face crystallizer copper plate, which is conducive to reducing the cost of the continuous casting steel plant, reducing the number of shutdowns, and reducing the maintenance and installation time of the upper and lower machines, and the economic benefits are more considerable.

Description

Technical Field

[0001] The invention relates to the field of continuous casting crystallizers, and in particular provides a narrow surface crystallizer copper plate and a continuous casting crystallizer. Background Art

[0002] The continuous casting crystallizer is usually composed of two wide crystallizers at the front and back and one narrow crystallizer on the left and right, with a rectangular cross-section. The upper end surface of the crystallizer is called the upper mouth, and the lower end surface of the crystallizer is called the lower mouth. In addition to requiring high thermal conductivity, the copper plate of the continuous casting crystallizer is also required to have a high steel passing capacity, that is, a long service life. The service life of the copper plate, especially the narrow copper plate, is related to the type of strengthening layer or coating, and also to the design structure of the strengthening layer. Usually, the offline of the crystallizer copper plate is related to whether the strengthening layer copper plate leaks copper, and copper leakage means offline.

[0003] In view of this, this application is hereby filed. Summary of the invention

[0004] The object of the present invention is to provide a narrow-faced crystallizer copper plate, which can prolong the service life of the narrow-faced crystallizer copper plate by designing the thickness of the strengthening layer.

[0005] Another object of the present invention is to provide a continuous casting crystallizer with a prolonged service life.

[0006] The present invention is achieved by adopting the following technical solutions:

[0007] An embodiment of the present invention provides a narrow-faced crystallizer copper plate, which includes a plate body and a strengthening layer attached to the surface of the plate body. The narrow-faced crystallizer copper plate divides a working surface from an upper end surface to a lower end surface into a first working surface close to the upper end surface and a second working surface close to the lower end surface through a preset dividing line. The second working surface includes a middle working surface and side working surfaces located on both sides of the middle working surface. The thickness of the strengthening layer of the middle working surface gradually increases along the direction from the upper end surface to the lower end surface, and the thickness of the strengthening layer of the side working surface gradually decreases along the direction from the side working surface to the middle working surface. The minimum thickness of the strengthening layer of the side working surface is greater than or equal to the thickness of the strengthening layer of the middle working surface.

[0008] Optionally, in other embodiments of the present application, the distance between the position of the above-mentioned dividing line and the upper end surface is 200-300 mm.

[0009] Optionally, in other embodiments of the present application, the side working surfaces are located in an area with a width of 20-30 mm on both sides of the second working surface.

[0010] Optionally, in other embodiments of the present application, the side working surface is a rectangular area or a triangular area with a width of 20-30 mm at the lower end surface.

[0011] Optionally, in other embodiments of the present application, the thickness of the strengthening layer of the above-mentioned intermediate working surface gradually transitions from 0.2-0.5 mm to 1.2-2.0 mm along the direction from the upper end surface to the lower end surface.

[0012] Optionally, in other embodiments of the present application, the thickness of the strengthening layer on the side working surface transitions from 2.5-3.5 mm to 1.2-2.0 mm along the direction from the side working surface to the middle working surface.

[0013] Optionally, in other embodiments of the present application, the thickness of the strengthening layer of the above-mentioned first working surface gradually increases from the upper end surface to the lower end surface, or the thickness of the strengthening layer of the first working surface is uniform; the maximum strengthening layer thickness of the first working surface is not greater than the minimum strengthening layer thickness of the middle working surface.

[0014] Optionally, in other embodiments of the present application, the thickness of the strengthening layer on the first working surface is 0.2-0.3 mm.

[0015] Optionally, in other embodiments of the present application, the thickness of the strengthening layer of the side working surface gradually increases from the upper end surface to the lower end surface.

[0016] An embodiment of the present invention further provides a continuous casting crystallizer, which includes the above-mentioned narrow surface crystallizer copper plate.

[0017] The beneficial effects of the embodiments of the present invention include:

[0018] The narrow face crystallizer copper plate provided in the embodiment of the present invention divides the narrow face crystallizer copper plate into various areas, and designs the thickness of the strengthening layer of the middle working surface to gradually thicken along the direction from the upper end surface to the lower end surface, and the thickness of the strengthening layer of the side working surface to gradually decrease along the direction from the side working surface to the middle working surface. The above design can make the lower part and both sides of the lower part of the narrow face crystallizer copper plate significantly thicker, especially, the thickness of the side working surfaces on both sides is significantly greater than the thickness of the middle working surface, which is more in line with the wear law of the narrow face crystallizer copper plate, which is conducive to reducing the cost of the continuous casting steel plant, reducing the number of shutdowns, and reducing the maintenance and installation time of the upper and lower machines, and the economic benefits are more considerable. BRIEF DESCRIPTION OF THE DRAWINGS

[0019] In order to more clearly illustrate the technical solutions of the embodiments of the present invention, the drawings required for use in the embodiments are briefly introduced below. It should be understood that the following drawings only show certain embodiments of the present invention and therefore should not be regarded as limiting the scope. For ordinary technicians in this field, other related drawings can be obtained based on these drawings without creative work.

[0020] Figure 1A bottom view of a narrow-surface crystallizer copper plate provided in Example 1 of the present invention;

[0021] Figure 2 A front view of a narrow-surface crystallizer copper plate provided in Example 1 of the present invention;

[0022] Figure 3 A left side view of a narrow-faced crystallizer copper plate provided in Example 1 of the present invention;

[0023] Figure 4 A front view of a narrow-faced crystallizer copper plate provided in Example 4 of the present invention;

[0024] Figure 5 A left side view of a narrow-faced crystallizer copper plate provided in Example 4 of the present invention;

[0025] Figure 6 A front view of a narrow-faced crystallizer copper plate provided in Example 5 of the present invention;

[0026] Figure 7 This is a left view of the narrow-faced crystallizer copper plate provided in Example 5 of the present invention.

[0027] Icons: 100 - narrow face crystallizer copper plate; 110 - plate body; 111 - dividing line; 112 - first working surface; 113 - second working surface; 114 - middle working surface; 115 - side working surface; 116 - upper end surface; 117 - lower end surface; 120 - strengthening layer. DETAILED DESCRIPTION

[0028] In order to make the purpose, technical solutions and advantages of the embodiments of the present invention clearer, the technical solutions in the embodiments of the present invention will be clearly and completely described below in conjunction with the drawings in the embodiments of the present invention. Obviously, the described embodiments are part of the embodiments of the present invention, not all of the embodiments. Generally, the components of the embodiments of the present invention described and shown in the drawings here can be arranged and designed in various different configurations.

[0029] Therefore, the following detailed description of the embodiments of the present invention provided in the accompanying drawings is not intended to limit the scope of the invention claimed for protection, but merely represents selected embodiments of the present invention. Based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of the present invention.

[0030] It should be noted that similar reference numerals and letters denote similar items in the following drawings, and therefore, once an item is defined in one drawing, further definition and explanation thereof is not required in subsequent drawings.

[0031] In the description of the present invention, it should be noted that the terms "center", "up", "down", "left", "right", "vertical", "horizontal", "inside", "outside", etc. indicate positions or positional relationships based on the positions or positional relationships shown in the accompanying drawings, or the positions or positional relationships in which the product of the invention is usually placed when in use, or the positions or positional relationships commonly understood by those skilled in the art, which are only for the convenience of describing the present invention and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation, and therefore cannot be understood as limiting the present invention. In addition, the terms "first", "second", "third", etc. are only used to distinguish the description, and cannot be understood as indicating or implying relative importance.

[0032] In addition, the terms "horizontal", "vertical", "overhanging" and the like do not mean that the components are required to be absolutely horizontal or overhanging, but can be slightly tilted. For example, "horizontal" only means that its direction is more horizontal than "vertical", and does not mean that the structure must be completely horizontal, but can be slightly tilted.

[0033] In the description of the present invention, it is also necessary to explain that, unless otherwise clearly specified and limited, the terms "set", "install", "connect", and "connect" should be understood in a broad sense, for example, it can be a fixed connection, a detachable connection, or an integral connection; it can be a mechanical connection or an electrical connection; it can be a direct connection, or it can be indirectly connected through an intermediate medium, or it can be the internal communication of two elements. For ordinary technicians in this field, the specific meanings of the above terms in the present invention can be understood according to specific circumstances.

[0034] See also Figure 1 An embodiment of the present invention provides a narrow-faced crystallizer copper plate 100, which includes a plate body 110 and a strengthening layer 120 attached to the surface of the plate body 110. The strengthening layer 120 in the present application can be attached to the surface of the plate body 110 by electroplating, electroforming, spraying, chemical plating or laser processing.

[0035] In the prior art, strengthening layers of different thicknesses are formed on the surface of a rectangular copper plate according to the thickness of the strengthening layer, but it is difficult to achieve a change in the preset thickness of the strengthening layer in the prior art. In this embodiment, by presetting the thickness of the strengthening layer 120, the shape of the working surface of the plate body 110 changes with the change in the thickness of the strengthening layer 120, so that the surface of the strengthening layer 120 is a plane, and the shape of the lower surface of the plate body 110 is not limited in this application, and can be a plane or other shapes. The plate body 110 with different thicknesses in different regions formed by presetting is more convenient when attaching the strengthening layer 120, which can be achieved by conventional electroplating, electroforming, spraying, chemical plating or laser processing.

[0036] Specifically, see Figure 2 and Figure 3 The narrow face crystallizer copper plate 100 divides the working surface from the upper end surface 116 to the lower end surface 117 into a first working surface 112 close to the upper end surface 116 and a second working surface 113 close to the lower end surface 117 through a preset dividing line 111. The second working surface 113 includes an intermediate working surface 114 and side working surfaces 115 located on both sides of the intermediate working surface 114. The position of the dividing line 111 is 200-300 mm away from the upper end surface 116. In other embodiments of the present application, the position of the dividing line 111 can be, for example, any one of 200, 210, 220, 230, 240, 250, 260, 270, 280, 290 and 300 mm or a range value between any one of them. The side working surfaces 115 are located in an area with a width of 20-30 mm on both sides of the second working surface 113. The side working surface 115 can be a rectangular area (please refer to Figure 2 or Figure 4 ) or a triangular area with a width of 20-30 mm on the lower end surface 117 (see Figure 6 ), when the side working surface 115 is a triangular area, its cross section is a right triangle, the right angle side is the right angle side of the plate body 110, and the width of the side working surface 115 gradually increases from the upper end surface 116 to the lower end surface 117. In other embodiments of the present application, the side working surface 115 can be located in an area where the width of both sides of the second working surface 113 is any one of 20, 21, 22, 23, 24, 25, 26, 27, 28, 29 and 30 mm or a range between the two values.

[0037] In the present application, the narrow face crystallizer copper plate 100 is divided into three regions, and the thickness of the three regions (the first working surface 112, the middle working surface 114 and the side working surface 115) is respectively limited, so that the corresponding strengthening layer 120 can be formed into a preset thickness in one overall coating, without the need for multiple regional processing. The thickness of the coating of the first working surface 112, the middle working surface 114 and the side working surface 115 is specifically designed as follows:

[0038] The thickness of the strengthening layer 120 of the first working surface 112 gradually increases along the direction from the upper end surface 116 to the lower end surface 117, or the thickness of the strengthening layer 120 of the first working surface 112 is uniform; the maximum thickness of the strengthening layer 120 of the first working surface 112 is not greater than the minimum thickness of the strengthening layer 120 of the middle working surface 114. The thickness of the strengthening layer 120 of the first working surface 112 is 0.2-0.3mm. The first working surface 112 is located on the upper part of the narrow face crystallizer copper plate 100, and it contacts the liquid steel in the molten state that has not yet solidified, or the billet shell that is very thin and has low hardness. In such an environment, the upper coating of the copper plate or copper tube is required to have good thermal conductivity. Therefore, in this application, the thickness of the strengthening layer 120 of the first working surface 112 is relatively thin, which is 0.2-0.3mm.

[0039] The thickness of the strengthening layer 120 of the middle working surface 114 gradually increases along the direction from the upper end surface 116 to the lower end surface 117, specifically from 0.2-0.5 mm (for example, it can be any one of 0.2, 0.3, 0.4 and 0.5 mm or a range value between any two) to 1.2-2.0 mm (for example, it can be any one of 1.2, 1.3, 1.4, 1.5, 1.6, 1.7, 1.8, 1.9 and 2.0 mm or a range value between any two). Correspondingly, the shape of the portion of the upper surface of the plate body 110 corresponding to the middle working surface 114 gradually changes along the direction from the upper end surface 116 to the lower end surface 117. The molten steel enters the crystallizer and starts to be continuously cast from the meniscus of the continuous casting crystallizer to the lower mouth of the crystallizer. The thickness of the shell increases from zero to a certain thickness after solidification, and the hardness of the shell gradually increases. The wear also changes from relatively slight at the upper mouth to gradually heavier. The cooling intensity of the corners of the steel billet is stronger and the hardness of the shell is higher. Therefore, the thickness of the strengthening layer 120 on the middle working surface 114 also gradually increases, from 0.2-0.5mm to 1.2-2.0mm.

[0040] The thickness of the strengthening layer 120 of the side working surface 115 gradually decreases along the direction from the side working surface 115 to the middle working surface 114, specifically transitioning from 2.5-3.5 mm (for example, it can be any one of 2.5, 2.6, 2.7, 2.8, 2.9, 3.0, 3.1, 3.2, 3.3, 3.4 and 3.5 mm or a range value between any two) to 1.2-2.0 mm (for example, it can be any one of 1.2, 1.3, 1.4, 1.5, 1.6, 1.7, 1.8, 1.9 and 2.0 mm or a range value between any two). Correspondingly, the shape of the portion of the upper surface of the plate body 110 corresponding to the side working surface 115 gradually changes along the direction from the side working surface 115 to the middle working surface 114.

[0041] It is worth noting that the side working surface 115 is also defined in the present application. In particular, the thickness of the strengthening layer 120 of the side working surface 115 gradually decreases along the direction from the side working surface 115 to the middle working surface 114, and the thickness of the strengthening layer 120 of the side working surface 115 is greater than or equal to the thickness of the strengthening layer 120 of the middle working surface 114. In the present application, the thickness of the strengthening layer 120 of the side working surface 115 gradually decreases along the direction from the side working surface 115 to the middle working surface 114 in two ways. One is that the thickness of the strengthening layer 120 of the side working surface 115 gradually decreases from the two side edges of the side working surface 115, and the second is that the thickness gradually decreases from a specific position away from the two side edges of the side working surface 115 (in this embodiment, the thickness of the strengthening layer 120 of the side working surface 115 is gradually reduced). Figure 1 That is, the second method is shown), and the thickness of the two sides of the side working surface 115 is kept uniform before reaching a specific position, which can facilitate the thickness of the two sides close to the side working surface 115 to be thicker. In this application, the lower part of the narrow side crystallizer copper plate 100 is significantly thickened, which is more in line with the wear law of the narrow side crystallizer copper plate 100. The inventor has found through research that the steel passing capacity of the narrow side copper plate of the crystallizer without the thickening layer 120 at the corners of both sides is usually 25,000-30,000 tons; while the steel passing capacity of the narrow side copper plate of the crystallizer with the thickening layer 120 at the corners of both sides can usually reach 40,000-50,000 tons. The continuous casting steel plant not only reduces costs, but also reduces the number of shutdowns and the maintenance and installation time of the machine, and the economic benefits are more considerable.

[0042] Preferably, the thickness of the strengthening layer 120 of the side working surface 115 gradually increases along the direction from the upper end surface 116 to the lower end surface 117. Through this design, the thickness of the strengthening layer of the side working surface 115 is the largest near the corner, which can increase the wear amount of the narrow copper plate before it goes off the line, increase the amount of steel passing, and extend the service life of the narrow copper plate accordingly.

[0043] In addition, an embodiment of the present invention further provides a continuous casting crystallizer, which includes the above-mentioned narrow surface crystallizer copper plate 100.

[0044] The narrow crystallizer copper plate 100 provided in the present embodiments 1-5 divides the working surface of the narrow crystallizer copper plate 100 from the upper end surface 116 to the lower end surface 117 into a first working surface 112 close to the upper end surface 116 and a second working surface 113 close to the lower end surface 117 through a dividing line 111. The second working surface 113 includes a middle working surface 114 and side working surfaces 115 located on both sides of the middle working surface 114.

[0045] Example 1

[0046] like Figure 1 , Figure 2 and Figure 3As shown, the position of the dividing line 111 in the narrow face crystallizer copper plate 100 provided in this embodiment is located at 300mm away from the upper end surface 116, wherein the first working surface 112 and the middle working surface 114 are an integrated structure, and the strengthening layer 120 of the first working surface 112 and the middle working surface 114 gradually thickens from the upper end surface 116 to the lower end surface 117, gradually transitioning from 0.2mm to 1.5mm, and the side working surface 115 is a rectangular area with a width of 30mm, and the thickness of the strengthening layer 120 of the side working surface 115 gradually decreases from the side working surface 115 to the middle working surface 114, transitioning from 3mm to 1.5mm. The steel passing capacity of the copper plate with this structure reaches 48,000 tons.

[0047] Example 2

[0048] The position of the dividing line 111 in the narrow face crystallizer copper plate 100 provided in this embodiment is located at 200mm away from the upper end face 116, wherein the thickness of the strengthening layer 120 of the first working surface 112 is 0.2mm, the strengthening layer 120 of the middle working surface 114 gradually thickens from the upper end face 116 to the lower end face 117, and gradually transitions from 0.2mm to 1.8mm, and the side working surface 115 is a rectangular area with a width of 22mm, and the thickness of the strengthening layer 120 of the side working surface 115 gradually decreases from 3.2mm to 1.8mm along the direction from the side working surface 115 to the middle working surface 114. The steel passing amount of this structure copper plate reaches 48,200 tons.

[0049] Embodiment 3:

[0050] The position of the dividing line 111 in the narrow face crystallizer copper plate 100 provided in this embodiment is located at 300mm away from the upper end face 116, wherein the thickness of the strengthening layer 120 of the first working surface 112 is 0.3mm, the strengthening layer 120 of the middle working surface 114 gradually thickens from the upper end face 116 to the lower end face 117, and gradually transitions from 0.3mm to 1.5mm, and the side working surface 115 is a rectangular area with a width of 25mm, and the thickness of the strengthening layer 120 of the side working surface 115 gradually decreases from the side working surface 115 to the middle working surface 114, and transitions from 3.5mm to 1.5mm. The steel passing capacity of this structure copper plate reaches 50,000 tons.

[0051] Embodiment 4:

[0052] like Figure 4 and Figure 5As shown, the position of the dividing line 111 in the narrow face crystallizer copper plate 100 provided in this embodiment is located at 300mm away from the upper end surface 116, wherein the thickness of the strengthening layer 120 of the first working surface 112 is 0.3mm, and the strengthening layer 120 of the middle working surface 114 gradually thickens from the upper end surface 116 to the lower end surface 117, gradually transitioning from 0.5mm to 1.5mm, and the side working surface 115 is a rectangular area with a width of 20mm, and the thickness of the strengthening layer 120 of the lower end surface 117 of the side working surface 115 gradually decreases along the direction from the side working surface 115 to the middle working surface 114, transitioning from 3mm to 1.5mm. The thickness of the strengthening layer 120 of the side working surface 115 gradually thickens along the direction from the upper end surface 116 to the lower end surface 117, transitioning from 0.5mm to 3mm. The steel passing amount of this structure copper plate reaches 46,000 tons.

[0053] Embodiment 5:

[0054] like Figure 6 and Figure 7 As shown, the position of the dividing line 111 in the narrow face crystallizer copper plate 100 provided in this embodiment is located at 300mm away from the upper end surface 116, wherein the thickness of the strengthening layer 120 of the first working surface 112 is 0.3mm, and the strengthening layer 120 of the middle working surface 114 gradually thickens from the upper end surface 116 to the lower end surface 117, gradually transitioning from 0.3mm to 1.5mm. In this embodiment, the side working surface 115 is a triangular area, and the lower edge length of the triangular area is 30mm. The thickness of the strengthening layer 120 of the lower end surface 117 of the side working surface 115 gradually decreases along the direction from the side working surface 115 to the middle working surface 114, and transitions from 3mm to 1.5mm. The thickness of the strengthening layer 120 of the side working surface 115 gradually thickens along the direction from the upper end surface 116 to the lower end surface 117, and transitions from 0.5mm to 3mm. The steel passing amount of this structure copper plate reaches 43,000 tons.

[0055] In summary, the narrow face crystallizer copper plate 100 provided by the embodiment of the present invention divides the plate body 110 into various regions, and the thickness of the strengthening layer 120 of the middle working surface 114 is designed to gradually increase along the direction from the upper end surface 116 to the lower end surface 117, and the thickness of the strengthening layer 120 of the side working surface 115 is designed to gradually decrease along the direction from the side working surface 115 to the middle working surface 114. The above design can make the lower part and both sides of the lower part of the narrow face crystallizer copper plate 100 significantly thickened, which is more in line with the wear law of the narrow face crystallizer copper plate 100, which is conducive to reducing the cost of the continuous casting steel plant, reducing the number of shutdowns, and reducing the maintenance and installation time of the upper and lower machines, and the economic benefits are more considerable.

[0056] The above description is only a preferred embodiment of the present invention and is not intended to limit the present invention. For those skilled in the art, the present invention may have various modifications and variations. Any modification, equivalent replacement, improvement, etc. made within the spirit and principle of the present invention shall be included in the protection scope of the present invention.

Claims

1. A narrow surface crystallizer copper plate, characterized in that: It comprises a plate body and a strengthening layer attached to the surface of the plate body, the narrow face crystallizer copper plate divides the working surface from the upper end face to the lower end face into a first working surface close to the upper end face and a second working surface close to the lower end face through a preset dividing line, the second working surface comprises a middle working surface and side working surfaces located on both sides of the middle working surface; the thickness of the strengthening layer of the middle working surface gradually increases along the direction from the upper end face to the lower end face, the thickness of the strengthening layer of the side working surface gradually decreases along the direction from the side working surface to the middle working surface, and the minimum thickness of the strengthening layer of the side working surface is greater than or equal to the thickness of the strengthening layer of the middle working surface; The distance between the position of the dividing line and the upper end surface is 200-300mm; the side working surface is located in the area with a width of 20-30mm on both sides of the second working surface; the thickness of the strengthening layer of the middle working surface gradually transitions from 0.2-0.5mm to 1.2-2.0mm along the direction from the upper end surface to the lower end surface; the thickness of the strengthening layer of the side working surface transitions from 2.5-3.5mm to 1.2-2.0mm along the direction from the side working surface to the middle working surface; the thickness of the strengthening layer of the first working surface gradually increases along the direction from the upper end surface to the lower end surface or the thickness of the strengthening layer of the first working surface is uniform; the maximum thickness of the strengthening layer of the first working surface is not greater than the minimum thickness of the strengthening layer of the middle working surface; The side working surface is a rectangular area or a triangular area with a width of 20-30 mm at the lower end surface; the thickness of the strengthening layer of the first working surface is 0.2-0.3 mm; the thickness of the strengthening layer of the side working surface gradually increases from the upper end surface to the lower end surface.

2. A continuous casting crystallizer, characterized in that: It comprises the narrow-faced crystallizer copper plate as claimed in claim 1.

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