An oxygen-free copper rod crystallizer

Abstract

The present invention relates to an oxygen-free copper rod crystallizer, which comprises an integrated graphite mold, wherein the integrated graphite mold comprises a large diameter cylindrical section, a conical section and a small diameter cylindrical section arranged in sequence, wherein a cavity is provided in the large diameter cylindrical section, a boss is provided in the cavity, an external thread is provided on the top of the boss, a through hole is provided in the boss, and the through hole extends downward to penetrate the conical section and the small diameter cylindrical section. The large diameter cylindrical section, the conical section and the small diameter cylindrical section of the present invention are integrally formed without gaps, and refractory mud is not used to fill the gaps, and long-term baking is not required, and slagging is not easy in the copper liquid, while cracks and fissures are avoided in the crystallizer at the primary cooling zone-the external thread interface; the conical section is arranged so that when the crystallizer is inserted into the insulation furnace, the graphite phosphorus sheet covering the surface of the copper liquid will not be brought into the furnace, and the slag in the furnace is not easy to gather and slag under the large diameter cylindrical section; the double-row liquid flow holes greatly improve the output and production efficiency, and ensure the quality of the copper rod.

Description

Technical Field

[0001] The invention relates to the technical field of copper alloy upward continuous casting processing, in particular to an oxygen-free copper rod crystallizer. Background Art

[0002] Oxygen-free copper rods are mainly produced by upward continuous casting. At present, when copper alloy is continuously cast upward, Figure 6-8 As shown, the crystallizer is assembled by a cylindrical graphite protective sleeve and a graphite mold. The upper end of the graphite mold is inserted into the cylindrical graphite protective sleeve. The cylindrical graphite protective sleeve and the graphite mold are matched, and the gap between the two is filled with resistant cement 6. There are the following defects: 1. The crystallizer is unevenly baked and cannot be completely baked and dried; 2. When the copper liquid is inserted into the furnace body, the copper liquid splashes and injures people, which is unsafe; 3. The cylindrical graphite protective sleeve is a round flat bottom surface, which is easy to bring the surface covering agent graphite phosphorus sheet to below the copper liquid surface; 4. The garbage brought into the copper liquid will be filled and coated with the surrounding area of ​​the combination of the mold and the protective sleeve. Refractory mud reacts quickly, slags, and gathers at the bottom of the protective sleeve; 5. Cracks and cracks are generated in the primary cooling zone of the crystallizer, that is, the external threaded interface of the graphite mold, which seriously affects the internal quality of the upper lead rod; 6. The life of the upper lead mold is reduced; 7. Long-term upper lead-in can easily bring phosphorus flake ash and charcoal ash into the copper rod; 8. The single row of liquid flow holes on the graphite cap reduces the flow of molten copper, reduces the lead-in speed, reduces output, and has low production efficiency; 9. When continuously casting the upper lead rod with special alloy content, the copper liquid is viscous and has a slow flow rate. It cannot completely fill the primary cooling zone of the crystallizer graphite mold, affecting the quality of the copper rod. Summary of the invention

[0003] The purpose of the present invention is to overcome the above-mentioned shortcomings and provide an oxygen-free copper rod crystallizer.

[0004] The object of the present invention is achieved in that:

[0005] An oxygen-free copper rod crystallizer comprises an integrated graphite mold, wherein the integrated graphite mold comprises a large-diameter cylindrical section, a conical section and a small-diameter cylindrical section which are arranged in sequence, wherein a cavity is provided in the large-diameter cylindrical section, a boss is provided in the cavity, an external thread is provided on the top of the boss, a through hole is provided in the boss, and the through hole extends downward to penetrate the conical section and the small-diameter cylindrical section.

[0006] Preferably, a graphite cap is sleeved on the bottom of the small-diameter cylindrical section, an upper liquid drainage hole is provided on the small-diameter cylindrical section, and a lower liquid drainage hole is provided on the graphite cap.

[0007] Preferably, the upper liquid discharge hole is close to the bottom of the small diameter cylindrical section and the graphite cap is exposed.

[0008] Preferably, the external thread is screwed onto a brass base, and the brass base is connected to a cooling device.

[0009] Preferably, the cooling device comprises an inner tube, and the inner tube is communicated with the through hole.

[0010] The beneficial effects of the present invention are:

[0011] The large-diameter cylindrical section, the conical section and the small-diameter cylindrical section of the present invention are integrally formed without gaps, and refractory clay is not used to fill the gaps, and long-term baking is not required. Slag is not easy to form in the copper liquid, and cracks and fissures are avoided in the crystallizer at the primary cooling zone, that is, the external thread interface. The conical section is arranged so that when the crystallizer is inserted into the insulation furnace, the graphite phosphorus sheet covering the surface of the copper liquid will not be brought into the furnace, and the slag in the furnace is not easy to gather and slag under the large-diameter cylindrical section. The double-row liquid flow holes can effectively increase the filtering flow of the copper liquid, and the original guide speed can be further increased by 5-15 cm / min, thereby greatly improving the output and production efficiency, and ensuring the quality of the copper rod. BRIEF DESCRIPTION OF THE DRAWINGS

[0012] Figure 1 It is a schematic diagram of the structure of the present invention.

[0013] Figure 2 It is a structural schematic diagram of an integrated graphite mold.

[0014] Figure 3 for Figure 2 Schematic diagram of the structure.

[0015] Figure 4 It is a three-dimensional schematic diagram of an integrated graphite mold.

[0016] Figure 5 This is a schematic diagram of the production structure of the oxygen-free copper rod of the present invention.

[0017] Figure 6 It is a structural schematic diagram of a crystallizer in the prior art.

[0018] Figure 7 for Figure 6 Schematic diagram of the structure of the cylindrical graphite protective sleeve.

[0019] Figure 8 for Figure 6 Schematic diagram of the structure of the graphite mold.

[0020] Wherein: an integrated graphite mold 1; a large diameter cylindrical section 1.1; a conical section 1.2; a small diameter cylindrical section 1.3; a boss 1.4; an external thread 1.5; a through hole 1.6; an upper drainage hole 1.7; a graphite cap 2; a lower drainage hole 2.1; a brass base 3; a cooling device 4; a cooling water jacket 4.1; an inner tube 4.2; a middle tube 4.3; an outer tube 4.4; a water inlet 4.5; a water outlet 4.6; a refractory heat-insulating cotton 5; a refractory mud 6; a cylindrical graphite protective sleeve 7; a graphite mold 8; and a graphite phosphorus sheet 9. DETAILED DESCRIPTION

[0021] See also Figure 1-5 The present invention relates to an oxygen-free copper rod crystallizer, which includes an integrated graphite mold 1, wherein the integrated graphite mold 1 includes a large-diameter cylindrical section 1.1, a cone section 1.2 and a small-diameter cylindrical section 1.3 arranged in sequence, wherein a cavity is provided in the large-diameter cylindrical section 1.1, a boss 1.4 is provided in the cavity, an external thread 1.5 is provided on the top of the boss 1.4, a through hole 1.6 is provided in the boss 1.4, and the through hole 1.6 extends downward to connect the cone section 1.2 and the small-diameter cylindrical section 1.1.

[0022] A graphite cap 2 is sleeved on the bottom of the small-diameter cylindrical section 1.3, and an internal thread is arranged inside the graphite cap 2. The bottom of the small-diameter cylindrical section 1.3 is screwed into the graphite cap 2. The small-diameter cylindrical section 1.3 is provided with an upper liquid discharge hole 1.7, and the graphite cap 2 is provided with a lower liquid discharge hole 2.1.

[0023] The upper liquid discharge hole 1.7 is close to the bottom of the small diameter cylindrical section 1.3 and the graphite cap 2 is exposed.

[0024] The external thread 1.5 is screwed to the brass base 3, and the brass base 3 is connected to the cooling device 4 to fully cool the copper rod.

[0025] The cooling device 4 comprises a cooling water jacket 4.1, an inner tube 4.2, a middle tube 4.3, an outer tube 4.4, a water inlet 4.5, and a water outlet 4.6. The inner tube 4.2 is communicated with the through hole 1.6, and the inner tube 4.2 is used for copper rod forming. The middle tube 4.3 is sleeved outside the inner tube 4.2, and the outer tube 4.4 is sleeved outside the middle tube 4.3. A first cooling cavity is formed between the middle tube and the outer tube, and a second cooling cavity is formed between the middle tube and the inner tube. The first cooling cavity is communicated with the bottom of the second cooling cavity. The top of the inner tube 4.2, the top of the middle tube 4.3, and the top of the outer tube 4.4 are connected to the cooling water jacket 4.1. The water inlet 4.5 and the water outlet 4.6 are arranged on the cooling water jacket 4.1. The cooling water enters the first cooling cavity and the second cooling cavity in sequence from the water inlet 4.5 and then flows out from the water outlet 4.6 to fully cool the formed copper rod.

[0026] The cavity is provided with fire-resistant heat-insulating cotton 5, and the fire-resistant heat-insulating cotton 5 covers the side wall and the bottom of the cavity. The bottom of the brass base 3 is in contact with the fire-resistant heat-insulating cotton 5. The bottom of the inner tube 4.2, the bottom of the middle tube 4.3, and the bottom of the outer tube 4.4 are arranged between the fire-resistant heat-insulating cotton and the brass base to protect the brass base from being damaged by high temperature.

[0027] The conical section 1.2 prevents the graphite phosphorus sheet 9, a surface covering agent of the copper liquid, from being brought into the furnace when the crystallizer is inserted into the insulation furnace. At the same time, the slag is not easy to gather and slag under the large-diameter cylindrical section 1.1. The large-diameter cylindrical section 1.1, the conical section 1.2 and the small-diameter cylindrical section 1.3 are integrally formed without gaps, and there is no need to use refractory mud 6 for filling and coating, and there is no need to bake for too long, and it is not easy to slag in the copper liquid. At the same time, it is avoided that the crystallizer is cracked and cracked at the interface of the external thread 1.5 in the primary cooling zone. The crystallizer is provided with double liquid discharge holes, wherein the upper liquid discharge hole 1.7 increases the flow of the copper liquid, increases the drawing speed by 5-15 cm / min, and ensures the quality of the copper rod. The lower liquid discharge hole 2.1 is arranged around the graphite cap to filter the copper liquid slag and facilitate the furnace body to pump out the copper water cleanly without wasting the copper liquid. The external thread 1.5 connects the graphite mold with the brass base 3 of the crystallizer.

[0028] Here’s how it works:

[0029] The large diameter cylindrical section 1.1, the conical section 1.2 and the small diameter cylindrical section 1.3 are integrally formed without gaps, and refractory clay is not used to fill the gaps. Long-term baking is not required, slagging is not easy in the copper liquid, and cracks and fissures are avoided in the crystallizer at the primary cooling zone - the external thread interface; the conical section is arranged so that when the crystallizer is inserted into the insulation furnace, the graphite phosphorus sheet covering the surface of the copper liquid will not be brought into the furnace, and the slag in the furnace is not easy to gather and slag under the large diameter cylindrical section; the double-row liquid flow holes can effectively increase the filtering flow of the copper liquid, and the original guide speed can be further increased by 5-15cm / min, which greatly improves the output and production efficiency and ensures the quality of the copper rod.

[0030] In addition to the above embodiments, the present invention also includes other implementation modes. Any technical solutions formed by equivalent transformation or equivalent replacement should fall within the protection scope of the claims of the present invention.

Claims

1. An oxygen-free copper rod crystallizer, characterized in that: The invention comprises an integrated graphite mould (1), wherein the integrated graphite mould (1) comprises a large diameter cylindrical section (1.1), a cone section (1.2) and a small diameter cylindrical section (1.3) which are arranged in sequence; a cavity is provided in the large diameter cylindrical section (1.1); a boss (1.4) is provided in the cavity; an external thread (1.5) is provided at the top of the boss (1.4); a through hole (1.6) is provided in the boss (1.4); the through hole (1.6) extends downward to penetrate the cone section (1.2) and the small diameter cylindrical section (1.3); The conical section (1.2) prevents the graphite phosphorus sheet (9) covering the surface of the copper liquid from being brought into the furnace when the crystallizer is inserted into the holding furnace. At the same time, the slag is not easy to gather and slag under the large-diameter cylindrical section (1.1). The large-diameter cylindrical section (1.1), the conical section (1.2) and the small-diameter cylindrical section (1.3) are integrally formed without gaps. A graphite cap (2) is sleeved on the bottom of the small-diameter cylindrical section (1.3), an upper liquid drainage hole (1.7) is provided on the small-diameter cylindrical section (1.3), and a lower liquid drainage hole (2.1) is provided on the graphite cap (2); The external thread (1.5) is threadedly connected to a brass base (3), and the brass base (3) is connected to a cooling device (4).

2. The oxygen-free copper rod crystallizer according to claim 1, characterized in that: The upper liquid discharge hole (1.7) is close to the bottom of the small diameter cylindrical section (1.3) and exposes the graphite cap (2).

3. The oxygen-free copper rod crystallizer according to claim 1, characterized in that: The cooling device (4) comprises an inner tube (4.2), and the inner tube (4.2) is connected to the through hole (1.6).

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