Graphite electrode presintering device
By designing a graphite electrode pre-firing device, the problem of additive residue affecting electrode performance and low pre-firing efficiency is solved, and the effect of improving the purity and performance of the electrode material is achieved, and the quality of the crucible finished product is improved.
Patent Information
- Application Number
- CN202421552687.5
- Authority / Receiving Office
- CN · China
- Patent Type
- Utility models(China)
- Current Assignee / Owner
- Filing Date
- 2024-07-02
- Publication Date
- 2025-05-09
- Estimated Expiration
- 2034-07-02
AI Technical Summary
During the arc melting process of existing graphite electrodes, additive residues affect the electrode performance, and the prefiring efficiency is low, which consumes production time.
A graphite electrode pre-burning device is designed, including a shell, pre-burning assembly, control system, exhaust pipe, automatic valve and movable door. The graphite electrode material is heated through a heating mechanism, the automatic valve discharges solvent vapor and additive vapor, and the cooling mechanism cools the electrode.
The internal purity and performance of graphite electrode materials are improved, and the ionic conductivity and electrochemical reaction rate are enhanced by removing impurities and solvents, the life of the electrode is extended, and the quality of the finished crucible product is improved.
Smart Images
Figure CN222849760U_ABST
Abstract
Description
Technical Field
[0001] The present application relates to the technical field of graphite electrode processing, and in particular to a graphite electrode pre-sintering device. Background Art
[0002] Quartz crucibles are mainly made by arc method, where quartz sand is formed into the inner surface of a rotating mold according to technical requirements, and then melted into crucible blanks by arc high temperature. During the arc melting process, the quartz sand raw material melts into liquid at high temperature, and impurities and gases are removed from it. This process is the core process of making quartz crucibles, which determines the purity, strength, and microbubble density of the quartz crucible.
[0003] The electrodes used in the arc method are generally graphite electrodes, which play an important role in the arc melting process. In the synthesis process of graphite electrode materials, some additives such as solvents and catalysts are usually added. If the electrode is not pre-burned, these additives will remain inside the material, which will affect the performance of the electrode material and further affect the quality of the finished crucible.
[0004] Currently, graphite electrodes need to be pre-burned during the production process, which is inefficient and consumes production time. Utility Model Content
[0005] The present application proposes a graphite electrode pre-burning device, which takes electrode pre-burning as an independent process. To this end, the present application adopts the following technical solutions.
[0006] A graphite electrode pre-burning device comprises a shell, a pre-burning assembly, a control system, an exhaust pipe, an automatic valve and a movable door. The pre-burning assembly comprises an inner box with a single-side opening, a cooling mechanism, a heating mechanism and an outer box with a single-side opening; the outer box and the inner box are both arranged in the shell; the outer box is sleeved outside the inner box; the opening of the outer box and the opening of the inner box are located at the same end; the cooling mechanism and the heating mechanism are both arranged between the inner box and the outer box. The exhaust pipe passes through the outer box and enters the inner box; the automatic valve is installed on the exhaust pipe; the automatic valve and the heating mechanism are electrically connected to the control system. The shell has an opening; one end of the inner box with an opening is seamlessly attached to the periphery of the inner end of the opening of the shell; the movable door is installed at the outer end of the opening of the shell, and is used to close or open the opening of the shell.
[0007] By adopting the above technical solution, the heating mechanism heats the inner box, and the graphite electrode material can be placed in the inner box. During the pre-burning process, the automatic valve can be opened by the control system to discharge the solvent vapor, auxiliary agent vapor, etc. generated by the graphite electrode material out of the inner box. After pre-burning, the heating mechanism is turned off, and the cooling mechanism is started to cool the inner box to cool the graphite electrode. This pre-burning process can be carried out before using the electrode to produce the crucible, which helps to improve production efficiency and save production costs. The internal purity of the electrode material after pre-burning is higher. By removing impurities and solvents, the ionic conductivity and electrochemical reaction rate of the electrode material can be improved, thereby improving the performance and life of the electrode material. In addition, pre-burning makes the crystal structure of the electrode material more complete, improves the electron transfer ability of the electrode material, and helps to improve the quality of the finished product of the prepared crucible.
[0008] A preferred structure of the graphite electrode pre-burning device is that the cooling mechanism includes a water inlet pipe, multiple cooling pipes and a return pipe; the water inlet pipe is connected to the water inlet end of each cooling pipe; the multiple cooling pipes are all attached to the outer wall surface of the inner layer box; and the water outlet end of each cooling pipe is connected to the return pipe.
[0009] By adopting the above technical solution, the cooling mechanism can slowly cool the graphite electrode material in the inner box.
[0010] A preferred structure of the graphite electrode pre-burning device is that each of the cooling tubes is in the shape of a non-closed planar ring and surrounds the four outer wall surfaces of the inner layer box; and the multiple cooling tubes are parallel to each other.
[0011] By adopting the above technical solution, the cooling pipe can fully cool the annular wall surface composed of the four outer walls of the inner box, and one end of the inner box is open, and the other end can be used to set an exhaust pipe, etc., which can achieve sufficient cooling without causing interference.
[0012] A preferred structure of the graphite electrode pre-burning device is that the heating mechanism includes heating wires; the heating wires are arranged at intervals outside the plurality of cooling tubes; and the heating wires surround the four outer wall surfaces of the inner layer box.
[0013] By adopting the above technical solution, the heating wire can fully and evenly heat the inner box, and can be heated to a high temperature of 1000°C according to requirements.
[0014] A preferred structure of the graphite electrode pre-burning device is that the heating wire has wire segments which are alternately connected in U shape and inverted U shape.
[0015] By adopting the above technical solution, the overall shape of the heating wire is well adapted to the shape of the outer wall of the inner box, so that the coverage area of the heating wire is wide.
[0016] A preferred structure of the graphite electrode pre-burning device is that the movable door includes a door body, a turning handle, a connecting shaft and a cross; the connecting shaft passes through the door body; the outer end of the connecting shaft is fixedly connected to the turning handle, and the inner end is fixedly connected to the cross; the cross has two mutually perpendicular rods, and the two rods are in the same vertical plane. When any one of the rods of the cross is at an angle of 45° with the horizontal plane, the cross can pass through the opening of the shell without contact; when one of the rods of the cross is perpendicular to the horizontal plane, the cross can be embedded in the inner side wall of the opening of the shell, and the movable door and the shell are seamlessly connected.
[0017] By adopting the above technical solution, the cross can be clamped and disengaged from the inner side of the shell opening by turning the handle, and the door body can be opened and closed to the shell opening by rotating the door body.
[0018] A preferred structure of the graphite electrode pre-burning device is that the opening of the outer shell is square, and the opening of the inner box is square; when any one of the rods of the cross is at an angle of 45° with the horizontal plane, the height of the cross is less than the height of the opening of the outer shell, and the width of the cross is less than the width of the opening of the outer shell; when one of the rods of the cross is perpendicular to the horizontal plane, the height of the cross is greater than the height of the opening of the outer shell or the width of the cross is greater than the width of the opening of the outer shell, the height of the cross is less than the height of the opening of the inner box or the width of the cross is less than the width of the opening of the inner box.
[0019] By adopting the above technical solution, when the cross is clamped and disengaged from the inner side of the shell opening, and when the door body is opened and closed to the shell opening, there is no interference between the cross, the shell and the inner box, and the operation is smooth.
[0020] A preferred structure of the graphite electrode pre-burning device is that the movable door also includes a sealing frame gasket; the sealing frame gasket is attached to the inner wall surface of the door body; when the cross is embedded on the inner wall of the opening of the shell, the sealing frame gasket is seamlessly attached to the outer periphery of the opening of the shell.
[0021] By adopting the above technical solution, when the movable door is closed, the movable door and the shell form a sealed contact to prevent the solvent and other pollutants of the graphite electrode material from leaking therefrom.
[0022] In summary, the graphite electrode pre-burning device of the present application has the following beneficial effects: the heating mechanism heats the inner box, and the graphite electrode material can be placed in the inner box. During the pre-burning process, the automatic valve can be opened by the control system to discharge the solvent vapor, auxiliary agent vapor, etc. generated by the graphite electrode material out of the inner box. After pre-burning, the heating mechanism is turned off, and the cooling mechanism is started to cool the inner box to cool the graphite electrode. This pre-burning process can be performed before using the electrode to produce the crucible, which helps to improve production efficiency and save production costs. The internal purity of the electrode material after pre-burning is higher. By removing impurities and solvents, the ionic conductivity and electrochemical reaction rate of the electrode material can be improved, thereby improving the performance and life of the electrode material. In addition, pre-burning makes the crystal structure of the electrode material more complete, improves the electron transfer ability of the electrode material, and helps to improve the quality of the finished product of the crucible. BRIEF DESCRIPTION OF THE DRAWINGS
[0023] Figure 1 This is an external structural diagram of a graphite electrode pre-burning device.
[0024] Figure 2 for Figure 1 The device hides one side wall of the shell, showing the internal structure.
[0025] Figure 3 for Figure 2 The structure hides the structural diagram behind the shell, movable doors and control system.
[0026] Figure 4 for Figure 3 Another perspective of the picture.
[0027] Figure 5 for Figure 3 The structure hides the structure diagram behind the inner and outer boxes.
[0028] Figure 6 for Figure 1 Cross-sectional view of a graphite electrode pre-burning device.
[0029] Figure 7 for Figure 5 Structural diagram of the cooling mechanism.
[0030] Figure 8 for Figure 5 Structural diagram of the heating mechanism.
[0031] Fig. 9 for Figure 1 Front structural diagram of the movable door in the graphite electrode pre-burning device.
[0032] Fig.10 for Fig. 9 Left view of .
[0033] Fig.11 for Fig. 9 Rear view of.
[0034] Fig.12 for Fig.11 Another state diagram of the structure.
[0035] Figure numerals: outer shell 1; pre-burning component 2; control system 3; exhaust pipe 4; automatic valve 5; movable door 6; inner box 21; cooling mechanism 22; heating mechanism 23; outer box 24; water inlet pipe 221; cooling pipe 222; return pipe 223; drainage groove 224; heating wire 231; door body 61; turning handle 62; connecting shaft 63; cross 64; sealing frame gasket 65; display input module 7; heat dissipation hole 101. DETAILED DESCRIPTION
[0036] The graphite electrode pre-burning device is described in detail below with reference to the accompanying drawings.
[0037] See also Figure 1 and Figure 2 A graphite electrode pre-burning device includes a housing 1, a pre-burning component 2, a control system 3, an exhaust pipe 4, an automatic valve 5 and a movable door 6.
[0038] See also Figure 3 and Figure 4 The pre-burning assembly 2 includes an inner layer box 21 with a single-side opening, a cooling mechanism 22, a heating mechanism 23 and an outer layer box 24 with a single-side opening.
[0039] The outer box 24 and the inner box 21 are both arranged in the outer shell 1. The outer box 24 is sleeved outside the inner box 21. The opening of the outer box 24 and the opening of the inner box 21 are located at the same end.
[0040] The cooling mechanism 22 and the heating mechanism 23 are both disposed between the inner layer box 21 and the outer layer box 24. Figure 5 The cooling mechanism 22 and the heating mechanism 23 can be laid in a mesh manner.
[0041] The exhaust pipe 4 passes through the outer box 24 and enters the inner box 21. The automatic valve 5 is installed on the exhaust pipe 4. The automatic valve 5 can be a solenoid valve. The automatic valve 5 and the heating mechanism 23 are electrically connected to the control system 3. On the one hand, since the pressure inside the inner box 21 is very high after the pre-burning process, on the other hand, a large amount of solvents and other substances of the graphite electrode material are accumulated in the inner box 21. Therefore, it is necessary to reduce the pressure inside the inner box 21 and remove the polluted gas to facilitate the removal of the pre-burned graphite electrode.
[0042] See also Figure 6The outer shell 1 has an opening. The inner box 21 has an opening at one end thereof and is seamlessly attached to the inner periphery of the opening of the outer shell 1. The movable door 6 is installed at the outer end of the opening of the outer shell 1 to close or open the opening of the outer shell 1.
[0043] The above-mentioned graphite electrode pre-burning device is used for pre-burning graphite electrode materials. Among them, the heating mechanism 23 heats the inner box 21, and the graphite electrode material can be placed in the inner box 21. During the pre-burning process, the automatic valve 5 can be opened by the control system 3 to discharge the solvent vapor, auxiliary agent vapor, etc. generated by the graphite electrode material from the inner box 21. After pre-burning, the heating mechanism 23 is turned off, and the cooling mechanism 22 is started to cool the inner box 21 to cool the graphite electrode. This pre-burning process can be carried out before using the electrode to produce the crucible, which helps to improve production efficiency and save production costs. The internal purity of the electrode material after pre-burning is higher. By removing impurities and solvents, the ionic conductivity and electrochemical reaction rate of the electrode material can be improved, thereby improving the performance and life of the electrode material. In addition, pre-burning makes the crystal structure of the electrode material more complete, improves the electron transfer ability of the electrode material, and helps to improve the quality of the finished product of the crucible.
[0044] See also Figure 7 An optional structure of the cooling mechanism 22 is that the cooling mechanism 22 includes a water inlet pipe 221, a plurality of cooling pipes 222 and a water return pipe 223. The water inlet pipe 221 is connected to the water inlet end of each of the cooling pipes 222. The plurality of cooling pipes 222 are all attached to the outer wall surface of the inner layer box 21. The water outlet end of each of the cooling pipes 222 is connected to the water return pipe 223. The cooling mechanism 22 may also include a drainage groove 224, into which the water return pipe 223 passes. The cooling mechanism 22 can slowly cool the graphite electrode material in the inner layer box 21.
[0045] The cooling pipes 222 may be laid in a manner that each of the cooling pipes 222 is in a non-closed planar ring shape and surrounds the four outer wall surfaces of the inner layer box 21. The plurality of cooling pipes 222 are parallel to each other. The cooling pipes 222 arranged in the above manner can fully cool the ring wall surface composed of the four outer wall surfaces of the inner layer box 21, and one end of the inner layer box 21 is open, and the other end can be used to set the exhaust pipe 4, etc., so that sufficient cooling is achieved without causing interference.
[0046] See also Figure 8 The heating mechanism 23 includes a heating wire 231. The heating wire 231 is arranged at intervals outside the plurality of cooling tubes 222. The heating wire 231 surrounds the four outer wall surfaces of the inner box 21. The heating mechanism 23 also includes a power supply, and the heating wire 231 is connected to the power supply. The heating wire 231 can fully and evenly heat the inner box 21, and can be heated to a high temperature of 1000°C as required.
[0047] One laying method of the heating wire 231 is that the heating wire 231 has U-shaped and inverted U-shaped wire segments alternately connected, so that the overall shape of the heating wire 231 is better adapted to the shape of the outer wall of the inner box 21, so that the heating wire 231 has a wide coverage area.
[0048] See also Fig. 9 and Fig.10 A preferred structure of the movable door 6 is that the movable door 6 includes a door body 61, a turning handle 62, a connecting shaft 63 and a cross 64. The connecting shaft 63 passes through the door body 61. The outer end of the connecting shaft 63 is fixedly connected to the turning handle 62, and the inner end is fixedly connected to the cross 64. The cross 64 has two mutually perpendicular rods, and the two rods are in the same vertical plane.
[0049] See also Fig.11 Any one of the rods of the cross 64 is at an angle of 45° with the horizontal plane, and the cross 64 can pass through the opening of the housing 1 without contact.
[0050] See also Fig.12 , the cross 64 has a rod perpendicular to the horizontal plane, see Figure 6 The cross 64 can be embedded in the inner wall of the opening of the shell 1, and the movable door 6 and the shell 1 are seamlessly connected. The cross 64 can be clamped and disengaged from the inner side of the opening of the shell 1 by turning the handle 62, and the door body 61 can be turned to open and close the opening of the shell 1.
[0051] A more specific structure of the movable door 6 docking the opening of the outer shell 1 and the opening of the inner box 21 is that the opening of the outer shell 1 is square, and the opening of the inner box 21 is square. When any one of the rods of the cross 64 is at an angle of 45° with the horizontal plane, the height of the cross 64 is less than the opening height of the outer shell 1, and the width of the cross 64 is less than the opening width of the outer shell 1. When one of the rods of the cross 64 is perpendicular to the horizontal plane, the height of the cross 64 is greater than the opening height of the outer shell 1 or the width of the cross 64 is greater than the opening width of the outer shell 1, the height of the cross 64 is less than the opening height of the inner box 21 or the width of the cross 64 is less than the opening width of the inner box 21. In the above specific structure, when the cross 64 is clamped and disengaged from the inner side of the opening of the outer shell 1, and the door body 61 is opened and closed to the opening of the outer shell 1, the cross 64, the outer shell 1 and the inner box 21 do not interfere with each other, and the operation is smooth.
[0052] In order to enhance the sealing effect between the movable door 6 and the opening of the housing 1, the movable door 6 is provided to further include a sealing frame gasket 65. The sealing frame gasket 65 is fitted on the inner wall surface of the door body 61. When the cross 64 is embedded on the inner side wall of the opening of the housing 1, the sealing frame gasket 65 is seamlessly fitted on the outer peripheral edge of the opening of the housing 1. When the movable door 6 is closed, the movable door 6 and the housing 1 form a sealed contact to prevent the leakage of pollutants such as solvents of graphite electrode materials from there.
[0053] The graphite electrode pre-burning device may further include a display input module 7 , which is embedded on the wall surface of the housing 1 , and the display input module 7 is electrically connected to the control system 3 .
[0054] A heat dissipation hole 101 is provided on the top surface of the shell 1, and the heat generated by the heating wire 231 can be discharged from the heat dissipation hole 101 after passing through the outer box 24, so as to prevent the input display module, control system 3, power supply, etc. from absorbing too much heat, thereby reducing the impact of high temperature on the life of the display input module 7, control system 3 and power supply.
[0055] The working process of the above-mentioned graphite electrode pre-burning device is as follows: graphite electrode (pre-burning raw material) → pushed into the inner layer box 21 through the movable door 6 → display input module 7 (control temperature, time, heating and cooling process) → annular heating wire 231 heating (heating to the set temperature, for example 1000°C) → heating is completed (constant temperature is maintained for 6-8 minutes, which is set according to the required pre-burning effect) → pre-burning is completed → cooling (cooling to about 35°C, cooling takes 2 hours) → taking out (work is completed).
[0056] The above pre-sintering process can be carried out before the crucible is produced by the arc method, which helps to improve production efficiency and save production costs. The internal purity of the graphite electrode material after pre-sintering is higher. By removing impurities and solvents, the ionic conductivity and electrochemical reaction rate of the graphite electrode material can be improved, thereby improving the performance and life of the graphite electrode material. In addition, pre-sintering makes the crystal structure of the graphite electrode material more complete, improves the electron transfer ability of the graphite electrode material, and helps to improve the quality of the finished crucible.
[0057] The above are only some embodiments of the present application, and the protection scope of the present application is not limited to the above embodiments. For ordinary technicians in this technical field, some improvements and modifications without departing from the creative design of the present application should also fall within the protection scope of the present application.
Claims
1. A graphite electrode pre-burning device, characterized in that: It comprises a housing (1), a pre-burning component (2), a control system (3), an exhaust pipe (4), an automatic valve (5) and a movable door (6); The pre-burning assembly (2) comprises an inner box (21) with a single-side opening, a cooling mechanism (22), a heating mechanism (23), and an outer box (24) with a single-side opening; the outer box (24) and the inner box (21) are both arranged in the outer shell (1); the outer box (24) is sleeved outside the inner box (21); the opening of the outer box (24) and the opening of the inner box (21) are located at the same end; the cooling mechanism (22) and the heating mechanism (23) are both arranged between the inner box (21) and the outer box (24); The exhaust pipe (4) passes through the outer box (24) and enters the inner box (21); the automatic valve (5) is installed on the exhaust pipe (4); the automatic valve (5) and the heating mechanism (23) are electrically connected to the control system (3); The outer shell (1) has an opening; one end of the inner layer box (21) having the opening is seamlessly attached to the inner edge of the opening of the outer shell (1); The movable door (6) is installed at the outer end of the opening of the shell (1) and is used to close or open the opening of the shell (1).
2. The graphite electrode pre-burning device according to claim 1, characterized in that: The cooling mechanism (22) comprises a water inlet pipe (221), a plurality of cooling pipes (222) and a water return pipe (223); the water inlet pipe (221) is connected to the water inlet end of each cooling pipe (222); the plurality of cooling pipes (222) are all attached to the outer wall surface of the inner layer box (21); and the water outlet end of each cooling pipe (222) is connected to the water return pipe (223).
3. The graphite electrode pre-burning device according to claim 2, characterized in that: Each cooling tube (222) is in the form of a non-closed planar ring, and surrounds the four outer wall surfaces of the inner layer box (21); the multiple cooling tubes (222) are parallel to each other.
4. The graphite electrode pre-burning device according to claim 2, characterized in that: The heating mechanism (23) comprises heating wires (231); the heating wires (231) are arranged at intervals outside the plurality of cooling tubes (222); and the heating wires (231) surround the outside of the four outer wall surfaces of the inner layer box (21).
5. The graphite electrode pre-burning device according to claim 4, characterized in that: The heating wire (231) comprises wire segments which are alternately connected in U shape and inverted U shape.
6. The graphite electrode pre-burning device according to claim 1, characterized in that: The movable door (6) comprises a door body (61), a turning handle (62), a connecting shaft (63) and a cross (64); the connecting shaft (63) passes through the door body (61); the outer end of the connecting shaft (63) is fixedly connected to the turning handle (62), and the inner end is fixedly connected to the cross (64); the cross (64) has two mutually perpendicular rods, and the two rods are located in the same vertical plane. When any one of the rods of the cross (64) is at an angle of 45° with the horizontal plane, the cross (64) can pass through the opening of the shell (1) without contact; when one of the rods of the cross (64) is perpendicular to the horizontal plane, the cross (64) can be embedded in the inner side wall of the opening of the shell (1), so that the movable door (6) and the shell (1) form a seamless connection.
7. The graphite electrode pre-burning device according to claim 6, characterized in that: The opening of the outer shell (1) is square, and the opening of the inner box (21) is square; when any one of the rods of the cross (64) is at an angle of 45° with the horizontal plane, the height of the cross (64) is less than the height of the opening of the outer shell (1), and the width of the cross (64) is less than the width of the opening of the outer shell (1); when one of the rods of the cross (64) is perpendicular to the horizontal plane, the height of the cross (64) is greater than the height of the opening of the outer shell (1) or the width of the cross (64) is greater than the width of the opening of the outer shell (1), the height of the cross (64) is less than the height of the opening of the inner box (21), or the width of the cross (64) is less than the width of the opening of the inner box (21).
8. The graphite electrode pre-burning device according to claim 6, characterized in that: The movable door (6) further comprises a sealing frame gasket (65); the sealing frame gasket (65) is fitted on the inner wall surface of the door body (61); when the cross (64) is embedded on the inner wall of the opening of the outer shell (1), the sealing frame gasket (65) is seamlessly fitted on the outer peripheral edge of the opening of the outer shell (1).