Cooling water hole structure for core part of electrode at furnace end and furnace tail of graphitization furnace

Abstract

The invention discloses a graphitization furnace head / tail electrode core cooling water hole structure, which comprises an electrode (1) of a furnace head or a furnace tail, and is characterized in that cooling water holes (2) for water cooling in the electrode (1) are respectively formed in the pushing end surface of the electrode (1) of the furnace head or the furnace tail, and the cooling water holes (2) are arranged along the length direction in the electrode (1) and are of a closed barrel-shaped structure. According to the invention, the problem of water leakage of the through cooling water hole of the electrode group is completely eradicated, the common imprisonment that the copper pipe is difficult to cool, manufacture and install, inconvenient to maintain and operate and the like is broken, and the device has very important significance for reducing the labor intensity of workers and improving the installation efficiency and production efficiency of a furnace. And the problems of overheat damage and the like of the electrode and surrounding graphite blocks are effectively prevented, so that the service life of the furnace is prolonged, and unnecessary production waste is reduced.

Description

Technical Field

[0001] The invention relates to a cooling water hole structure of a graphitization furnace head and tail electrode core, belonging to the technical field of industrial furnaces. Background Art

[0002] In the production of graphitization furnaces, there are two main cooling methods for the furnace head and furnace tail electrodes: one is to use external water cooling to directly spray the electrodes, which is simple and direct, and the cooling effect is average. This method has certain requirements for the cooling water quality and wastes a lot of water. It is necessary to set up a special drainage ditch and the collected wastewater needs to be re-purified, which increases the production cost of the graphitization furnace. At the same time, due to the mixing of spray water mist with the smoke and dust in the workshop, it is easy to cause serious environmental pollution and corrode the plant structure. In addition, in high-altitude cold areas, the spray water mist condenses on the roof of the plant to form ice cones, which is easy to cause personal safety accidents.

[0003] Therefore, more and more graphitization furnaces have abandoned this electrode cooling method and mostly adopted another method - internal water cooling, that is, cooling water holes are drilled in the electrode to cool the electrode. This method of circulating water cooling does not require additional water treatment investment, and there is no pollution problem of external water cooling. The cooling effect can basically meet production requirements. For example, Chinese patent CN115962659A discloses a graphitization furnace furnace head and furnace tail electrode cooling water hole structure and its installation method, comprising a furnace head or furnace tail electrode (8), characterized in that: a water inlet (9) and a water outlet (10) for water cooling in the electrode are respectively provided on two adjacent sides of each furnace head or furnace tail electrode (8), and a cooling water channel (1) is provided in the furnace head or furnace tail electrode (8), and the water inlet (9) and the water outlet (10) in the same furnace head or furnace tail electrode (8) are interconnected through the cooling water channel (1) in the furnace head or furnace tail electrode (8); the cooling water channel (1) in each furnace head or furnace tail electrode (8) is independently provided, and is not interconnected with or interfered with the cooling water channels (1) in other furnace head or furnace tail electrodes (8).

[0004] Since the end of the furnace head and furnace tail electrode is the electrode pushing working area, the water inlet and outlet of the cooling water hole are generally set on the side of the electrode near the pushing end. The entire cooling water hole is a through-electrode section method, and the cooling is simple and direct. For small-load graphitization furnaces such as single furnace head and furnace tail electrodes and double furnace head and furnace tail electrodes, this internal water cooling method is the most economical and applicable. With the continuous improvement of production capacity, the specifications of graphitized products are getting larger and larger. Considering the quality and cost of large-size furnace head and furnace tail electrodes, it has become a trend to use large-load graphitization furnaces with 2×2 arrangements of 4 electrodes per group. Since there are seams in the two-dimensional direction of the electrode section, directly opening a through-type cooling water hole will cause leakage and cannot be used. The existing common solution is to put another copper pipe in the through-type cooling water hole so that the cooling water can cool the electrode through the copper pipe. However, the use of copper tube cooling has the following disadvantages: a. To prevent the copper tube from oxidizing, there must be an interference fit between the copper tube and the electrode hole. Therefore, it is extremely difficult to install the copper tube through the electrode. General construction companies do not have the construction and installation capabilities, and the processing accuracy of the copper tube and the electrode hole generally cannot meet the installation requirements; b. The copper tube that is generally inserted is only about φ25mm in diameter. Due to the interference fit, the diameter of the copper tube is too small, and due to the size limitation of the electrode itself, too many copper tubes cannot be arranged. In addition, the cooling water must pass through the inner wall of the copper tube to cool the electrode. Therefore, the cooling effect of the entire electrode is poor, and the electrode and the surrounding graphite blocks are damaged due to overheating; c. After the graphitization furnace has been in production for a period of time, the copper tubes in the seams between each group of electrodes are severely oxidized, affecting the production of the graphitization furnace.

[0005] More importantly, this through-type internal cooling water hole opened from the side of the electrode has two major defects: a. It can only be cooled in a limited area of ​​the electrode, and it is impossible to effectively cool along the longitudinal direction (length direction) of the electrode, which greatly reduces the cooling effect; b. The number of copper tubes has a great influence on the cross-sectional area of ​​the electrode. If the number is too small, the cooling is insufficient. If the number is too large, the electrode cross-section will be reduced accordingly, thereby increasing the current density of the electrode and causing the electrode to overheat. Therefore, the quality requirements for the furnace head and furnace tail electrodes are relatively high, generally high-power graphite electrodes or even ultra-high-power graphite electrodes, which undoubtedly increases the production cost of the graphitization furnace. The above disadvantages have seriously restricted the production of large-load graphitization furnaces. Summary of the invention

[0006] The purpose of the present invention is to provide a graphitization furnace furnace head and furnace tail electrode core cooling water hole structure, while maintaining the original internal water cooling electrode cooling method of low production cost, low pollution and the like, can effectively solve the heavy load graphitization furnace furnace head and furnace tail electrode group cooling problem, avoid complex and difficult cooling copper tube installation, improve electrode cooling efficiency, reduce the probability of electrode graphite block damage, and increase the service life of the graphitization furnace.

[0007] The present invention adopts the following technical scheme: a cooling water hole structure for the core of the electrode at the furnace head and furnace tail of a graphitizing furnace, including an electrode at the furnace head or furnace tail, and cooling water holes for water cooling inside the electrode are respectively opened from the top push end surface of the electrode at the furnace head or furnace tail, and the cooling water holes are arranged along the length direction of the electrode to form a closed barrel structure.

[0008] Each electrode at the furnace head or furnace tail is respectively provided with an independent cooling water hole, and a water inlet and a water outlet are respectively opened on the side of the electrode. The water inlet and the water outlet are respectively connected to the cooling water hole, and the water inlet and the water outlet are respectively connected to the steel pipe, the external pipe joint and the hose interface.

[0009] The cooling water hole has a diameter of 120-250 mm.

[0010] The top end of the cooling water hole is connected to the electrode connector.

[0011] The connection section between the cooling water hole and the electrode joint is in a threaded cone shape with a larger top and a smaller bottom.

[0012] The depth of the cooling water hole is 700-1200 mm.

[0013] The entire cooling water hole is arranged inside the electrode and is connected to the outside of the electrode only through the water inlet and the water outlet.

[0014] Compared with the existing technology, the present invention can completely eliminate the problem of water leakage in the cooling water holes of the electrode group, breaking the common constraints of copper tube cooling, such as difficulty in manufacturing and installation, and inconvenient repair and maintenance operations. It is of great significance to reduce the labor intensity of workers and improve the installation efficiency and production efficiency of the furnace. The present invention also effectively overcomes the problems of overheating and damage of the electrode and the surrounding graphite blocks caused by the small cooling copper tube and the insufficient number of cooling copper tubes. At the same time, the large-aperture cooling water holes arranged along the length direction of the electrode of the present invention greatly increase the effective cooling area of ​​the electrode, which is very beneficial to improve the service life of the furnace and reduce unnecessary production waste. BRIEF DESCRIPTION OF THE DRAWINGS

[0015] Figure 1 It is a schematic diagram of the structure of the large-diameter core cooling water hole of the present invention; Figure 2 yes Figure 1 AA section view.

[0016] The markings in the attached drawings are: 1- furnace head or furnace tail electrode, 2- cooling water hole, 3- electrode joint, 4- steel pipe, 5- external pipe joint, 6- hose interface, 7- water inlet, 8- water outlet. DETAILED DESCRIPTION

[0017] The technical solutions in the embodiments of the present invention will be described clearly and completely below in conjunction with the accompanying drawings in the embodiments of the present invention. Example

[0018] A graphitization furnace furnace head and furnace tail electrode core cooling water hole structure, including a furnace head or furnace tail electrode 1, from the furnace head or furnace tail electrode 1 of the push end surface, respectively opened cooling water holes 2 for water cooling in the electrode 1, the cooling water holes 2 along the length of the electrode 1, the closed barrel structure.

[0019] Each electrode 1 at the furnace head or furnace tail is respectively provided with an independent cooling water hole 2, and a water inlet 7 and a water outlet 8 are respectively opened on the side of the electrode 1, the water inlet 7 and the water outlet 8 are respectively communicated with the cooling water hole 2, and the water inlet 7 and the water outlet 8 are respectively connected to the steel pipe 4, the external pipe joint 5 and the hose interface 6.

[0020] The cooling water hole 2 has a diameter of 120-250 mm.

[0021] The top end of the cooling water hole 2 is connected to the electrode connector 3 .

[0022] The connection section between the cooling water hole 2 and the electrode joint 3 is in a threaded cone shape with a larger top and a smaller bottom.

[0023] The depth of the cooling water hole 2 is 700-800 mm.

[0024] The entire cooling water hole 2 is arranged inside the electrode 1 and is connected to the outside of the electrode 1 only through the water inlet 7 and the water outlet 8 .

[0025] To ensure the electrode cooling efficiency, the water inlet 7 and the water outlet 8 should be spaced a certain distance apart. In this embodiment, the two are arranged vertically. The steel pipe 4 inserted into the water inlet 7 and the water outlet 8 is sealed with carbon mud around it, and then the external pipe joint 5 and the hose interface 6 are installed and connected to the external cooling water pipe. After the entire cooling water hole 2 is waterproofed, a thin layer of carbon mud is evenly applied to the threaded surface of the electrode joint 3, and the electrode 1 push end of the furnace head or furnace tail is smoothly screwed in. The excess part is cut and properly polished to make it flush with the electrode end, and then all joints are smoothed and sealed with carbon mud. Finally, the entire cooling water hole should be subjected to a water pressure test before production after processing. Example

[0026] A graphitization furnace furnace head and furnace tail electrode core cooling water hole structure, including a furnace head or furnace tail electrode 1, from the furnace head or furnace tail electrode 1 of the push end surface, respectively opened cooling water holes 2 for water cooling in the electrode 1, the cooling water holes 2 along the length of the electrode 1, the closed barrel structure.

[0027] The cooling water hole 2 has a diameter of 200 mm and a depth of 900 mm.

[0028] The entire cooling water hole 2 is arranged inside the electrode 1 and is connected to the outside of the electrode 1 only through the water inlet 7 and the water outlet 8 . Example

[0029] A graphitization furnace furnace head and furnace tail electrode core cooling water hole structure, including a furnace head or furnace tail electrode 1, from the furnace head or furnace tail electrode 1 of the push end surface, respectively opened cooling water holes 2 for water cooling in the electrode 1, the cooling water holes 2 along the length of the electrode 1, the closed barrel structure.

[0030] The cooling water hole 2 has a diameter of 240 mm and a depth of 1100 mm.

[0031] Although the present invention has been described in detail with reference to the aforementioned embodiments, it is still possible for those skilled in the art to modify the technical solutions described in the aforementioned embodiments, or to make equivalent substitutions for some of the technical features therein. Any modifications, equivalent substitutions, improvements, etc. made within the spirit and principles of the present invention should be included in the protection scope of the present invention.

Claims

1. A graphitization furnace furnace head and furnace tail electrode core cooling water hole structure, comprising a furnace head or furnace tail electrode (1), characterized in that: A cooling water hole (2) for water cooling inside the electrode (1) is respectively provided on the top push end surface of the electrode (1) at the furnace head or furnace tail. The cooling water hole (2) is arranged along the inner length direction of the electrode (1) to form a closed barrel-shaped structure.

2. The cooling water hole structure of the electrode core at the furnace head and furnace tail of the graphitization furnace according to claim 1 is characterized in that: Each furnace head or furnace tail electrode (1) is provided with an independent cooling water hole (2), and a water inlet (7) and a water outlet (8) are respectively provided on the side of the electrode (1), the water inlet (7) and the water outlet (8) are respectively communicated with the cooling water hole (2), and the water inlet (7) and the water outlet (8) are respectively connected to the steel pipe (4), the external pipe joint (5) and the hose interface (6).

3. The cooling water hole structure of the electrode core at the furnace head and furnace tail of the graphitization furnace according to claim 1 is characterized in that: The cooling water hole (2) has a diameter of 120-250 mm.

4. The cooling water hole structure of the electrode core at the furnace head and furnace tail of the graphitization furnace according to claim 1 is characterized in that: The top end of the cooling water hole (2) is connected to the electrode connector (3).

5. The cooling water hole structure of the electrode core at the furnace head and furnace tail of the graphitization furnace according to claim 1 is characterized in that: The connection section between the cooling water hole (2) and the electrode joint (3) is in the shape of a threaded cone that is larger at the top and smaller at the bottom.

6. The cooling water hole structure of the graphitization furnace head and tail electrode core according to claim 1, characterized in that: The cooling water hole (2) has a depth of 700-1200 mm.

7. The cooling water hole structure of the graphitization furnace head and tail electrode core according to claim 1, characterized in that: The entire cooling water hole (2) is arranged inside the electrode (1), and is connected to the outside of the electrode (1) only through the water inlet (7) and the water outlet (8).

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