Graphite crystallizer for up-drawing continuous casting of oxygen-free copper rod

Abstract

The utility model relates to the technical field of copper rods, in particular to a graphite crystallizer for up-drawing continuous casting of an oxygen-free copper rod, which is simple in structure, a fixed end and a forming end of a mandrel are detachably connected, when the forming end needs to be replaced, a pin does not need to be disassembled and assembled, the graphite crystallizer is simple and convenient, and the fixed end cannot be wasted. Comprising a cylindrical outer sleeve and a mandrel arranged in the outer sleeve, the mandrel comprises a fixing end and a forming end, and a plurality of liquid inlet holes are formed in the outer sleeve; and the forming end is detachably connected with the fixed end.

Description

Technical Field

[0001] The utility model relates to the technical field of copper rods, in particular to a graphite crystallizer for upward continuous casting of oxygen-free copper rods. Background Art

[0002] Copper rods mainly include two categories: solid and hollow. Due to the different processes for producing copper rods, the oxygen content and appearance of the copper rods produced are different. The copper rods produced by upward continuous casting have an oxygen content below 20ppm, which is called oxygen-free copper rod. Oxygen-free copper rod is a high-purity copper material product with extremely low oxygen content and is widely used.

[0003] Graphite crystallizers are mainly used in metallurgy and materials engineering, especially in continuous casting. Their working principle is based on the cooling and solidification process of molten metal. In the continuous casting process, graphite crystallizers play a core role in the formation of the "primary billet shell". Their main function is to quickly cool the high-temperature molten metal to form a solid shell with a certain thickness and shape, which is then continuously drawn out from above to finally obtain a continuous casting billet.

[0004] The graphite crystallizer in the prior art includes a cylindrical outer sleeve and a core shaft arranged in the outer sleeve, wherein the core shaft includes a fixed end and a forming end, wherein the fixed end is connected to the outer sleeve by a pin. When the forming end is worn or damaged due to long-term use, the core shaft needs to be replaced. If the structure of the graphite crystallizer in the prior art is adopted, the entire core shaft needs to be disassembled and assembled, which not only requires the disassembly and assembly of a large number of pins, but also causes waste of the fixed end. Utility Model Content

[0005] In order to solve the above technical problems, the utility model provides a graphite crystallizer for oxygen-free copper rod upward continuous casting, which has a simple structure. The fixed end and the forming end of the core shaft are arranged to be detachably connected. When the forming end needs to be replaced, there is no need to disassemble the pin, which is simple and convenient and does not waste the fixed end.

[0006] The utility model discloses a graphite crystallizer for oxygen-free copper rod upward continuous casting, comprising a cylindrical outer sleeve and a core shaft arranged in the outer sleeve, wherein the core shaft comprises a fixed end and a forming end, and the outer sleeve is provided with a plurality of liquid inlet holes; the forming end and the fixed end are connected by a disassembly connection mode.

[0007] As a preferred solution of the utility model, the forming end and the fixing end are connected by threads.

[0008] As a preferred solution of the utility model, the angle between the axis of the liquid inlet hole and the outer sleeve is greater than 90° and less than 180°.

[0009] As a preferred solution of the utility model, the height of the liquid inlet end of the liquid inlet hole is lower than the height of the liquid outlet end of the liquid inlet hole.

[0010] As a preferred solution of the utility model, a fan blade is arranged on the side of the forming end close to the fixed end.

[0011] As a preferred solution of the present utility model, the direction of the liquid inlet hole is recorded as direction A, the rotation direction of the fan blade is recorded as direction B, and the rotation direction of the forming end when the forming end is removed is recorded as direction C. Direction A is the same as direction B, and direction C is opposite to direction A.

[0012] As a preferred solution of the utility model, the fixed end is connected to the outer sleeve via a pin.

[0013] As a preferred solution of the utility model, when the forming end is connected to the fixed end, the end surface of the forming end contacts the end surface of the fixed end.

[0014] Compared with the prior art, the utility model has the following beneficial effects: when in use, the copper liquid enters the inner part of the outer sleeve along the liquid inlet hole, and as the copper liquid flows upward in the graphite crystallizer, its surface continuously contacts the cooled graphite wall and gradually solidifies, and by precisely controlling the flow rate and temperature of the cooling water, the metal solidification rate can be adjusted to ensure that the thickness of the generated blank shell is uniform and the strength is sufficient, thereby preventing the blank shell from breaking during the subsequent drawing process, and when the forming end part of the graphite crystallizer is worn or damaged due to long-term use, the forming end can be directly removed and the damaged forming end can be replaced without replacing the entire core shaft as a whole, thereby reducing maintenance costs and downtime. BRIEF DESCRIPTION OF THE DRAWINGS

[0015] Figure 1 It is a structural schematic diagram of the utility model;

[0016] Figure 2 It is a perspective view of the utility model from a top-down angle;

[0017] Figure 3 yes Figure 1 A perspective view of the present invention at an angle;

[0018] Figure 4 It is a schematic diagram of the structure of the core shaft and the fan blades;

[0019] Markings in the attached figure: 1, outer sleeve; 2, fixed end; 3, forming end; 4, liquid inlet hole; 5, fan blade; 6, pin. DETAILED DESCRIPTION

[0020] In order to make the above-mentioned purposes, features and advantages of the present invention more obvious and easy to understand, the specific implementation methods of the present invention are described in detail below in conjunction with the accompanying drawings.

[0021] In the following description, many specific details are set forth to facilitate a full understanding of the present invention, but the present invention may also be implemented in other ways different from those described herein, and those skilled in the art may make similar generalizations without violating the connotation of the present invention. Therefore, the present invention is not limited to the specific embodiments disclosed below.

[0022] Secondly, the term "one embodiment" or "embodiment" as used herein refers to a specific feature, structure or characteristic that may be included in at least one implementation of the present invention. The term "in one embodiment" that appears in different places in this specification does not necessarily refer to the same embodiment, nor does it refer to a separate or selective embodiment that is mutually exclusive with other embodiments.

[0023] Example 1

[0024] Reference Figure 1-Figure 4 , which is the first embodiment of the utility model, and provides a graphite crystallizer for upward continuous casting of an oxygen-free copper rod, comprising a cylindrical outer sleeve 1 and a mandrel arranged in the outer sleeve 1;

[0025] The mandrel includes a fixed end 2 and a formed end 3, the fixed end 2 includes a fixed portion connected to the outer sleeve 1 and a connecting portion integrally formed with the fixed portion, the cross section of the connecting portion is smaller than the cross section of the fixed portion, and the outer sleeve 1 is provided with a plurality of liquid inlet holes 4; the formed end 3 is connected to the fixed end 2 by a disassembly connection method;

[0026] When in use, the copper liquid enters the inner part of the outer sleeve 1 along the liquid inlet hole 4. As the copper liquid flows upward in the graphite crystallizer, its surface constantly contacts the cooled graphite wall and gradually solidifies. By accurately controlling the flow rate and temperature of the cooling water, the metal solidification rate can be adjusted to ensure that the thickness of the generated blank shell is uniform and the strength is sufficient to prevent the blank shell from breaking during the subsequent drawing process. When the forming end 3 of the graphite crystallizer is worn or damaged due to long-term use, the forming end 3 can be directly removed and the damaged forming end 3 can be replaced without replacing the entire core shaft as a whole, thereby reducing maintenance costs and downtime.

[0027] As a preferred embodiment of the present invention, refer to Figure 3 The forming end 3 and the fixed end 2 are connected by threads. More specifically, the connection portion has a cavity with an internal thread, and the forming end 3 has a screw rod. The forming end 3 can be disassembled and assembled by rotating it. The structure is simple and has good connection reliability.

[0028] As a preferred embodiment of the present invention, Figure 2As shown, the angle between the axis of the liquid inlet hole 4 and the outer sleeve 1 is greater than 90° and less than 180°. The angle drawing method mentioned here is the angle s between the radius of the outer sleeve 1 and the axis of the liquid inlet hole 4 in a top view or a bottom view; the height of the liquid inlet end of the liquid inlet hole 4 is lower than the height of the liquid outlet end of the liquid inlet hole 4, and the liquid inlet hole 4 is a straight hole or a spiral hole. When the molten copper enters the inner sleeve 1 through the liquid inlet hole 4, the setting of the above-mentioned liquid inlet hole 4 has a guiding effect when the molten copper enters the crystallizer, allowing the molten copper flow to be better distributed along the inner wall of the crystallizer, promoting the uniform solidification of the molten metal on the inner wall of the crystallizer, thereby reducing the generation of segregation and cracks, and improving the quality of the ingot.

[0029] As a preferred embodiment of the present invention, refer to Figure 2-Figure 4 A fan blade 5 is provided on one side of the forming end 3 close to the fixed end 2, the direction of the liquid inlet hole 4 is recorded as direction A, the rotation direction of the fan blade 5 is recorded as direction B, and the rotation direction of the forming end 3 when the forming end 3 is removed is recorded as direction C. Direction A is the same as direction B, and direction C is opposite to direction A. Through the above arrangement, when liquid is introduced, the copper liquid can make the forming end 3 have a tendency to rotate, and this tendency is opposite to the rotation direction of the forming end 3 when the forming end 3 is removed, so that the forming end 3 can be prevented from falling off during use.

[0030] As a preferred solution of the present invention, the fixed end 2 is connected to the outer sleeve 1 via a pin 6 .

[0031] As a preferred embodiment of the present invention, refer to Figure 4 When the forming end 3 is connected to the fixed end 2, the end surface of the forming end 3 contacts the end surface of the fixed end 2, which can prevent the copper liquid from entering between the threads.

[0032] Importantly, it should be noted that the construction and arrangement of the present application shown in a plurality of different exemplary embodiments are only exemplary. Although only a few embodiments are described in detail in this disclosure, it should be readily understood by those who refer to this disclosure that many modifications are possible, for example, the size, scale, structure, shape and proportion of various elements, and parameter values ​​(e.g., temperature, pressure, etc., mounting arrangement, use of materials, color, directional changes, etc.) without substantially departing from the novel teachings and advantages of the subject matter described in the application. For example, the element shown as integrally formed can be composed of multiple parts or elements, the position of the element can be inverted or otherwise changed, and the nature or number or position of the discrete element can be changed or changed. Therefore, all such modifications are intended to be included in the scope of the present utility model. The order or sequence of any process or method steps can be changed or reordered according to alternative embodiments. In the claims, any "device plus function" clause is intended to cover the structure described herein that performs the function, and is not only structurally equivalent but also equivalent structure. Without departing from the scope of the present invention, other substitutions, modifications, changes and omissions may be made in the design, operating conditions and arrangement of the exemplary embodiments. Therefore, the present invention is not limited to the specific embodiments of the specification, but extends to various modifications that still fall within the scope of the appended claims.

[0033] Additionally, in order to provide a concise description of example embodiments, all features of an actual embodiment may not be described (ie, those features that are not relevant to the best mode presently contemplated for carrying out the invention or those that are not relevant to implementing the invention).

[0034] It will be appreciated that in the development of any actual implementation, as in any engineering or design project, numerous implementation-specific decisions may be made. Such a development effort may be complex and time-consuming, but will be a routine task of design, fabrication, and production for those of ordinary skill having the benefit of this disclosure without undue experimentation.

[0035] It should be noted that the above embodiments are only used to illustrate the technical solution of the utility model rather than to limit it. Although the utility model has been described in detail with reference to the preferred embodiments, ordinary technicians in the field should understand that the technical solution of the utility model can be modified or replaced by equivalents without departing from the spirit and scope of the technical solution of the utility model, which should be included in the scope of the claims of the utility model.

Claims

1. A graphite crystallizer for oxygen-free copper rod upward continuous casting, comprising a cylindrical outer shell and a mandrel arranged in the outer shell, the mandrel comprising a fixed end and a forming end, and the outer shell is provided with a plurality of liquid inlet holes; characterized in that: The forming end and the fixing end are connected by a disassembly connection.

2. The graphite crystallizer for upward continuous casting of oxygen-free copper rod according to claim 1, characterized in that: The forming end and the fixing end are connected by threads.

3. The graphite crystallizer for upward continuous casting of oxygen-free copper rod according to claim 2, characterized in that: The angle between the axis of the liquid inlet hole and the outer sleeve is greater than 90° and less than 180°.

4. The graphite crystallizer for upward continuous casting of oxygen-free copper rod according to claim 3, characterized in that: The height of the liquid inlet end of the liquid inlet hole is lower than the height of the liquid outlet end of the liquid inlet hole.

5. The graphite crystallizer for upward continuous casting of oxygen-free copper rod according to claim 4, characterized in that: The forming end is provided with a fan blade on one side close to the fixing end.

6. The graphite crystallizer for upward continuous casting of oxygen-free copper rod according to claim 5, characterized in that: The direction of the liquid inlet hole is recorded as direction A, the rotation direction of the fan blade is recorded as direction B, and the rotation direction of the forming end when the forming end is removed is recorded as direction C. Direction A is the same as direction B, and direction C is opposite to direction A.

7. The graphite crystallizer for upward continuous casting of oxygen-free copper rod according to claim 1, characterized in that: The fixed end is connected to the outer sleeve through a pin.

8. The graphite crystallizer for upward continuous casting of oxygen-free copper rod according to claim 2, characterized in that: When the forming end is connected to the fixed end, the end surface of the forming end contacts the end surface of the fixed end.

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