Copper tile for submerged arc furnace
By setting a thermal stress relief groove on the outer arc surface of the copper tile in the electric arc furnace and adding a vertical water channel section for cooling, combined with independent inlet and outlet water pipes and a locking structure, the problems of thermal stress concentration and uneven cooling of the copper tile are solved, thereby improving structural stability, extending service life and reducing costs.
Patent Information
- Application Number
- CN202423214416.1
- Authority / Receiving Office
- CN · China
- Patent Type
- Utility models(China)
- Current Assignee / Owner
- Filing Date
- 2024-12-25
- Publication Date
- 2025-11-21
- Estimated Expiration
- 2034-12-25
AI Technical Summary
Existing copper tiles for electric arc furnaces suffer from concentrated thermal stress in the central area under high temperature and heavy load conditions, resulting in poor structural stability, short service life, uneven cooling, inconvenient maintenance, and high costs.
Multiple thermal stress relief grooves are set in the central area of the outer arc surface of the copper tile body, and vertical water channel sections are added in the cooling channel. Combined with independent inlet and outlet water pipes and locking structure, the structural design of the copper tile is optimized to release thermal stress and improve the cooling effect.
It effectively releases thermal stress, improves the structural stability of copper tiles, extends service life, reduces material costs, improves maintenance efficiency, and enhances cooling uniformity.
Smart Images
Figure CN223580574U_ABST
Abstract
Description
TECHNICAL FIELD
[0001] The utility model relates to the technical field of ore heating furnace, concretely relates to a copper tile for ore heating furnace. BACKGROUND
[0002] Ore heating furnace is also called electric arc furnace, and is mainly used for producing ferroalloy, industrial silicon, calcium carbide, yellow phosphorus and the like, and is also commonly called electric furnace in the industry. The copper tile is a conductive element, and the main function is to transmit electric current from the transformer to the electrode through the short net, water-cooled cable and conductive copper pipe, so as to melt the furnace charge.
[0003] During the operation of the ore heating furnace, the electric arc in the furnace can generate extremely high temperature, and the electrode can also generate high temperature during the transmission of large current. In addition, the ore heating furnace is accompanied by a series of extreme conditions such as spitting fire. Therefore, the copper tile of the ore heating furnace usually needs to work under the conditions of high temperature and large load, and needs to have excellent mechanical strength and heat resistance.
[0004] In recent years, with the development of the metallurgical industry, the design and manufacturing technology of the copper tile of the ore heating furnace has been continuously improved. At present, with the trend of large-scale of the ore heating furnace, the frequency of abnormal conditions such as spitting fire and arc striking has increased. The existing copper tile needs to be further strengthened in terms of structural stability, cooling capacity and the like. In addition, the research direction is to facilitate maintenance and reduce cost.
[0005] In the existing copper tile, the outer arc surface center area of the copper tile body is provided with a center pressing block accommodating groove, and a center pressing block is arranged in the center pressing block accommodating groove. A bellows expansion joint installed on the inner side of the pressure ring can apply a jacking force to the center pressing block, and push the copper tile to tightly hold the electrode, so that the copper tile and the electrode are in good contact. The position of the center pressing block accommodating groove is the concentrated stress point from the center pressing block. In addition, the cooling of the conventional copper tile is usually not uniform, so the center area of the conventional copper tile can generate a large thermal stress. If the thermal stress is not released in time, it will seriously affect the structural stability and service life of the copper tile. SUMMARY
[0006] The technical problem to be solved by the utility model is to provide a copper tile for ore heating furnace. The copper tile for ore heating furnace can effectively release the thermal stress generated due to temperature change, has strong structural stability, and is beneficial to prolong the service life. The technical scheme adopted is as follows:
[0007] A copper tile for ore heating furnace, comprising a copper tile body and two water inlet and outlet pipes, a cooling channel is arranged in the copper tile body, the two water inlet and outlet pipes are communicated with both ends of the cooling channel respectively, and the outer arc surface center area of the copper tile body is provided with a center pressing block accommodating groove. The utility model is characterized in that: a plurality of thermal stress release grooves are arranged on the outer arc surface of the copper tile body, and the plurality of thermal stress release grooves are distributed around the center pressing block accommodating groove.
[0008] The center block accommodating groove of the center block of the center region of the copper tile body is provided with a plurality of thermal stress release grooves, each of which can effectively release the thermal stress generated due to temperature change, thereby reducing the risk of deformation or damage of the copper tile body caused by stress concentration and improving the overall structural stability of the copper tile. In addition, the thermal stress release grooves are arranged on the outer arc surface of the copper tile body, which reduces the overall copper consumption of the copper tile to a certain extent and brings cost advantages.
[0009] Generally, the material of the copper tile body is pure copper or copper alloy, which has excellent thermal conductivity and ensures very good cooling effect, thereby prolonging the service life of the copper tile. The copper tile body can be made of forged copper plate or rolled copper plate.
[0010] In the preferred embodiment, the thermal stress release grooves are arranged on the copper tile body in a staggered manner with the cooling channels. The thermal stress release grooves are arranged on the copper tile body without cooling channels, and the depth of the thermal stress release grooves can be appropriately increased.
[0011] The thermal stress release grooves can be strip-shaped grooves extending upward and downward, and the cross-sectional shape of the thermal stress release grooves is rectangular.
[0012] In the preferred embodiment, the outer arc surface of the copper tile body is provided with two water inlet and outlet pipe insertion holes, and the two water inlet and outlet pipe insertion holes are respectively communicated with two ends of the cooling channel. The bottom of the water inlet and outlet pipe is closed, and the top of the water inlet and outlet pipe is provided with a water inlet and outlet opening. The side wall of the water inlet and outlet pipe is provided with an insertion part, and the insertion part is provided with a water passing hole communicated with the water inlet and outlet opening. The insertion part is embedded in the water inlet and outlet pipe insertion hole, and the outer arc surface of the copper tile body is provided with a water inlet and outlet pipe locking structure capable of locking the water inlet and outlet pipe on the outer arc surface of the copper tile body. A sealing ring is sleeved on the insertion part, and the outer arc surface of the copper tile body, the sealing ring and the side wall of the water inlet and outlet pipe are in close contact in sequence. The material of the water inlet and outlet pipe is generally pure copper or copper alloy. The water inlet and outlet pipe and the copper tile body are machined independently, which is beneficial to improve the material utilization rate and reduce the manufacturing cost compared with the integrated copper tile structure (i.e. the water inlet and outlet pipe is connected with the copper tile body in an integrated manner). Moreover, when water leakage occurs on site, the maintenance is convenient (for example, when the water inlet and outlet pipe of the conventional copper tile is damaged, the entire copper tile needs to be removed for maintenance or replacement of a new copper tile, while the copper tile with the optimized structure only needs to replace the water inlet and outlet pipe when the water inlet and outlet pipe is damaged, thereby greatly improving the maintenance efficiency). The insertion part is arranged on the side wall of the water inlet and outlet pipe, which is more convenient for the installation of the water inlet and outlet pipe and the sealing ring.
[0013] The sealing ring can be an O-shaped rubber ring or a copper gasket.
[0014] In the more preferable solution, the water inlet and outlet pipe locking structure comprises a water pipe clamping plate and a plurality of locking bolts, the water pipe clamping plate is provided with a plurality of through holes for the rods of the locking bolts to pass through, the outer arc surface of the copper tile body is provided with a plurality of screw holes, the locking bolts, the through holes and the screw holes correspond to each other, the rods of the locking bolts pass through the corresponding through holes and are screwed into the corresponding screw holes, and the heads of the locking bolts are tightly attached to the outer side surface of the water pipe clamping plate; the water inlet and outlet pipe is located between the inner side surface of the water pipe clamping plate and the outer arc surface of the copper tile body, and the inner side surface of the water pipe clamping plate and the outer arc surface of the copper tile body jointly clamp the water inlet and outlet pipe. The connection and fixation between the water inlet and outlet pipe and the copper tile body are realized through the water pipe clamping plate and the locking bolts, and no welding process is required, which is more convenient for the manufacture of the copper tile.
[0015] In the preferable solution, the cooling channel is sequentially connected by a first vertical water channel section, a first horizontal water channel section, a second vertical water channel section, a second horizontal water channel section, a third vertical water channel section, a third horizontal water channel section and a fourth vertical water channel section, the first horizontal water channel section and the third horizontal water channel section are arranged at the bottom of the copper tile body, the second horizontal water channel section is arranged at the top of the copper tile body, the first vertical water channel section, the second vertical water channel section, the third vertical water channel section and the fourth vertical water channel section are sequentially arranged in the horizontal direction, the lower end of the first vertical water channel section is communicated with the lower end of the second vertical water channel section through the first horizontal water channel section, the upper end of the second vertical water channel section is communicated with the upper end of the third vertical water channel section through the second horizontal water channel section, and the lower end of the third vertical water channel section is communicated with the lower end of the fourth vertical water channel section through the third horizontal water channel section; two water inlet and outlet pipes are respectively communicated with the upper end of the first vertical water channel section and the upper end of the fourth vertical water channel section. The existing cooling channel of the copper tile is usually in the shape of U (including two vertical water channel sections and one horizontal water channel section, and the two ends of the horizontal water channel section are respectively communicated with the lower ends of the two vertical water channel sections), the cooling effect on the middle part of the copper tile body is poor, the surface temperature is not uniform enough, and the copper tile is prone to burning or deforming. The preferable solution increases two vertical water channel sections, which can enhance the cooling effect, make the temperature of each part of the copper tile more uniform, and further improve the service life of the copper tile.
[0016] In the more preferable solution, the second horizontal water channel section comprises a strip-shaped water passing groove arranged on the top surface of the copper tile body, and the two ends of the groove bottom of the strip-shaped water passing groove are respectively communicated with the upper end of the second vertical water channel section and the upper end of the third vertical water channel section; a cover plate sealing the top opening of the strip-shaped water passing groove is arranged on the top of the strip-shaped water passing groove. Usually, the edge of the cover plate is welded with the edge of the top opening of the strip-shaped water passing groove.
[0017] Usually, the copper tile body is arc-shaped, and the first horizontal water channel section and the third horizontal water channel section are also arc-shaped; two straight line-shaped water channel sections can be formed on the copper tile body by drilling, and then the two straight line-shaped water channel sections are curved into arc-shaped horizontal water channel sections (i.e. the first horizontal water channel section and the third horizontal water channel section) when the copper tile body is bent into an arc shape.
[0018] The aforementioned first, second, third, and fourth vertical waterway sections can be formed on the copper tile body by drilling; after drilling, plugs are installed at the upper end of the first and fourth vertical waterway sections.
[0019] This invention features a thermal stress relief groove around the central pressure block receiving groove, which effectively releases thermal stress caused by temperature changes, reducing the risk of deformation or damage to the copper tile body due to stress concentration, and further improving the overall structural stability of the copper tile. Furthermore, the thermal stress relief groove on the outer arc surface of the copper tile body reduces the overall copper usage to some extent, thus lowering material costs. Attached Figure Description
[0020] Figure 1 This is a schematic diagram (perspective view) of a preferred embodiment of the present invention.
[0021] Figure 2 yes Figure 1 Front view of copper roofing tiles for blast furnaces in China;
[0022] Figure 3 yes Figure 1 Top view of the intermediate pressure ring unit;
[0023] Figure 4 yes Figure 3 AA section view;
[0024] Figure 5 yes Figure 3 BB cross-sectional view. Detailed Implementation
[0025] like Figures 1-3 As shown, this copper tile for a submerged arc furnace includes a copper tile body 1 and two inlet and outlet water pipes 2. The copper tile body 1 is provided with a cooling channel 3, and the two inlet and outlet water pipes 2 are respectively connected to the two ends of the cooling channel 3. A central pressure block receiving groove 4 is provided in the central area of the outer arc surface of the copper tile body 1. Multiple heat stress relief grooves 5 are provided on the outer arc surface of the copper tile body 1, and these multiple heat stress relief grooves 5 are distributed around the central pressure block receiving groove 4.
[0026] In the embodiment, the cooling channel 3 is sequentially connected by the first vertical water channel section 31, the first horizontal water channel section 32, the second vertical water channel section 33, the second horizontal water channel section 34, the third vertical water channel section 35, the third horizontal water channel section 36 and the fourth vertical water channel section 37. The first horizontal water channel section 32 and the third horizontal water channel section 36 are arranged at the bottom of the copper tile body 1, the second horizontal water channel section 34 is arranged at the top of the copper tile body 1, and the first vertical water channel section 31, the second vertical water channel section 33, the third vertical water channel section 35 and the fourth vertical water channel section 37 are sequentially arranged in the horizontal direction. The lower end of the first vertical water channel section 31 is communicated with the lower end of the second vertical water channel section 33 through the first horizontal water channel section 32, the upper end of the second vertical water channel section 33 is communicated with the upper end of the third vertical water channel section 35 through the second horizontal water channel section 34, and the lower end of the third vertical water channel section 35 is communicated with the lower end of the fourth vertical water channel section 37 through the third horizontal water channel section 36. The two water inlet and outlet pipes 2 are respectively communicated with the upper end of the first vertical water channel section 31 and the upper end of the fourth vertical water channel section 37.
[0027] The second horizontal water channel section 34 comprises a strip-shaped water channel 341 arranged on the top surface of the copper tile body 1, and the two ends of the groove bottom of the strip-shaped water channel 341 are respectively communicated with the upper end of the second vertical water channel section 33 and the upper end of the third vertical water channel section 35. The top opening of the strip-shaped water channel 341 is provided with a cover plate 342 for sealing the strip-shaped water channel 341.
[0028] The copper tile body 1 is arc-shaped, and the first horizontal water channel section 32 and the third horizontal water channel section 36 are also arc-shaped. Two horizontal linear water channel sections can be formed on the copper tile body 1 by drilling, and then when the copper tile body 1 is bent into an arc shape, the two linear water channel sections are bent into arc-shaped horizontal water channel sections (i.e., the first horizontal water channel section 32 and the third horizontal water channel section 36).
[0029] The first vertical water channel section 31, the second vertical water channel section 33, the third vertical water channel section 35 and the fourth vertical water channel section 37 are formed on the copper tile body 1 by drilling. After drilling, the plug 38 is installed at the upper end of the first vertical water channel section 31 and the upper end of the fourth vertical water channel section 37.
[0030] The setting positions of the thermal stress release grooves 5 on the copper tile body 1 are staggered with the cooling channels 3. In this embodiment, six thermal stress release grooves 5 are arranged on the outer arc surface of the copper tile body 1, which are thermal stress release grooves 5-1, 5-2, 5-3, 5-4, 5-5 and 5-6. The thermal stress release grooves 5-1, 5-2, 5-3 and 5-4 are strip grooves with rectangular cross sections and run vertically. The thermal stress release grooves 5-5 and 5-6 are rectangular grooves with rectangular cross sections and long edges in the vertical direction. The thermal stress release grooves 5-1 and 5-2 are arranged between the first vertical water channel section 31 and the second vertical water channel section 33 and above the first horizontal water channel section 32. The thermal stress release grooves 5-3 and 5-4 are arranged between the third vertical water channel section 35 and the fourth vertical water channel section 37 and above the third horizontal water channel section 36. The thermal stress release grooves 5-5 and 5-6 are arranged between the second vertical water channel section 33 and the third vertical water channel section 35 and below the second horizontal water channel section 34. The thermal stress release grooves 5-5 and 5-6 are above and below the center pressing block accommodating groove 4, respectively.
[0031] With reference to Figure 4 and Figure 5 In this embodiment, two water inlet and outlet pipe insertion holes 6 are arranged on the outer arc surface of the copper tile body 1 and communicate with the two ends of the cooling channels 3 (the two water inlet and outlet pipe insertion holes 6 communicate with the upper ends of the first vertical water channel section 31 and the fourth vertical water channel section 37, respectively). The bottom of the water inlet and outlet pipe 2 is closed and the top is provided with a water inlet and outlet opening 21. The side wall of the water inlet and outlet pipe 2 is provided with an insertion part 22, and the insertion part 22 is provided with a water passing hole 23 communicating with the water inlet and outlet opening 21. The insertion part 22 is embedded in the water inlet and outlet pipe insertion hole 6. The outer arc surface of the copper tile body 1 is provided with a water inlet and outlet pipe locking structure capable of locking the water inlet and outlet pipe 2 on the outer arc surface of the copper tile body 1. A sealing ring 7 is sleeved on the insertion part 22, and the outer arc surface of the copper tile body 1, the sealing ring 7 and the side wall of the water inlet and outlet pipe 2 are in close contact in sequence. The water inlet and outlet pipe locking structure includes a water pipe clamping plate 8 and a plurality of (such as four) locking bolts 9. The water pipe clamping plate 8 is provided with a plurality of (such as four) through holes 81 for the shafts 91 of the locking bolts 9 to pass through. The outer arc surface of the copper tile body 1 is provided with a plurality of screw holes 10. The locking bolts 9 and the through holes 81 correspond to the screw holes 10 (there are a total of eight screw holes 10 on the outer arc surface of the copper tile body 1; every four screw holes 10 form a group, corresponding to the four through holes 81 and the four locking bolts 9 on one water pipe clamping plate 8). The shafts 91 of the locking bolts 9 pass through the corresponding through holes 81 and are screwed into the corresponding screw holes 10. The heads 92 of the locking bolts 9 are tightly attached to the outer side surface of the water pipe clamping plate 8. The water inlet and outlet pipe 2 is between the inner side surface of the water pipe clamping plate 8 and the outer arc surface of the copper tile body 1. The inner side surface of the water pipe clamping plate 8 and the outer arc surface of the copper tile body 1 jointly clamp the water inlet and outlet pipe 2.
[0032] The sealing ring 7 can be an O-shaped rubber ring or a copper gasket.
[0033] The copper tile body 1 is made of pure copper or copper alloy, and the water inlet and outlet pipe 2 is made of pure copper or copper alloy.
[0034] During the operation of the copper tile for the submerged arc furnace, the thermal stress release grooves 5 can effectively release the thermal stress generated due to temperature changes, reducing the risk of deformation or damage of the copper tile body 1 due to stress concentration. The cooling water can enter the cooling channel 3 from one water inlet and outlet pipe 2, flow through the first vertical waterway section 31, the first horizontal waterway section 32, the second vertical waterway section 33, the second horizontal waterway section 34, the third vertical waterway section 35, the third horizontal waterway section 36, and the fourth vertical waterway section 37 in turn, and then flow out of the cooling channel 3 from the other water inlet and outlet pipe 2 after taking away the heat of the copper tile body 1, thereby achieving the cooling of the copper tile body 1.
Claims
1. A copper tile for a submerged arc furnace, comprising a copper tile body and two water inlet and outlet pipes, a cooling channel is arranged in the copper tile body, the two water inlet and outlet pipes are respectively communicated with two ends of the cooling channel, and a center pressing block accommodating groove is arranged in a center region of an outer arc surface of the copper tile body, characterized in that: The outer arc surface of the copper tile body is provided with a plurality of thermal stress release grooves which are distributed around the central pressing block accommodating groove.
2. The copper shoe for a submerged-arc furnace according to claim 1, characterized in that: The setting positions of the thermal stress release grooves on the copper tile body are staggered with the cooling channels.
3. The copper shoe for an ore smelting furnace according to claim 1 or 2, characterized in that: The thermal stress release grooves are strip grooves running up and down, and the cross-sectional shape of the strip grooves is rectangular.
4. The copper shoe for the ore smelting furnace according to claim 1 or 2, characterized in that: The outer arc surface of the copper tile body is provided with two water inlet and outlet pipe insertion holes which are respectively communicated with two ends of the cooling channel; the bottom of the water inlet and outlet pipe is closed, and the top of the water inlet and outlet pipe is provided with a water inlet and outlet opening; the side wall of the water inlet and outlet pipe is provided with an insertion part, and the insertion part is provided with a water passing hole communicated with the water inlet and outlet opening; the insertion part is embedded into the water inlet and outlet pipe insertion hole, and the outer arc surface of the copper tile body is provided with a water inlet and outlet pipe locking structure capable of locking the water inlet and outlet pipe on the outer arc surface of the copper tile body; a sealing ring is sleeved on the insertion part, and the outer arc surface of the copper tile body, the sealing ring and the side wall of the water inlet and outlet pipe are in close contact in sequence.
5. The copper shoe for a submerged-arc furnace as recited in claim 4, characterized in that: The sealing ring is an O-shaped rubber ring or a copper gasket.
6. The copper shoe for a submerged-arc furnace as set forth in claim 4, characterized by: The water inlet and outlet pipe locking structure comprises a water pipe clamping plate and a plurality of locking bolts, the water pipe clamping plate is provided with a plurality of through holes through which the shanks of the locking bolts pass, the outer arc surface of the copper tile body is provided with a plurality of screw holes, the locking bolts, the through holes and the screw holes are correspondingly arranged, the shanks of the locking bolts pass through the corresponding through holes and are screwed into the corresponding screw holes, and the heads of the locking bolts are tightly attached to the outer side surface of the water pipe clamping plate; the water inlet and outlet pipe is located between the inner side surface of the water pipe clamping plate and the outer arc surface of the copper tile body, and the inner side surface of the water pipe clamping plate and the outer arc surface of the copper tile body jointly clamp the water inlet and outlet pipe.
7. The copper shoe for a submerged-arc furnace as recited in claim 1 or 2, characterized by: The cooling channel is sequentially connected by a first vertical water channel section, a first horizontal water channel section, a second vertical water channel section, a second horizontal water channel section, a third vertical water channel section, a third horizontal water channel section and a fourth vertical water channel section, the first horizontal water channel section and the third horizontal water channel section are arranged at the bottom of the copper tile body, the second horizontal water channel section is arranged at the top of the copper tile body, the first vertical water channel section, the second vertical water channel section, the third vertical water channel section and the fourth vertical water channel section are sequentially arranged in the horizontal direction, the lower end of the first vertical water channel section is communicated with the lower end of the second vertical water channel section through the first horizontal water channel section, the upper end of the second vertical water channel section is communicated with the upper end of the third vertical water channel section through the second horizontal water channel section, and the lower end of the third vertical water channel section is communicated with the lower end of the fourth vertical water channel section through the third horizontal water channel section; the two water inlet and outlet pipes are respectively communicated with the upper end of the first vertical water channel section and the upper end of the fourth vertical water channel section.
8. The copper shoe for a submerged-arc furnace as set forth in claim 7, characterized by: The second horizontal water channel section comprises a strip-shaped water passing groove arranged on the top surface of the copper tile body, and the two ends of the groove bottom of the strip-shaped water passing groove are respectively communicated with the upper end of the second vertical water channel section and the upper end of the third vertical water channel section; a cover plate sealing the strip-shaped water passing groove is mounted on the top opening of the strip-shaped water passing groove.
9. The copper shoe for an ore smelting furnace according to claim 1 or 2, characterized in that: The material of the copper tile body is pure copper or copper alloy.
10. The copper shoe for an ore smelting furnace according to claim 1 or 2, characterized by: The material of the water inlet and outlet pipe is pure copper or copper alloy.