Vacuum furnace residual tube, Temperature control method and Computer readable storage medium

Abstract

The application relates to non-ferrous metal smelting equipment and provides a vacuum furnace residual pipe used for guiding the metal residues after vacuum furnace smelting and purification, which comprises an upper connecting seat, a high-temperature-resistant layer, a heating layer, a heat preservation layer, a supporting layer, a temperature measuring device and a lower connecting seat. One end of the high-temperature-resistant layer is fixedly provided with a first flange, and the bottom of the upper connecting seat is fixedly provided with a second flange. The high-temperature-resistant layer, the heating layer, the heat preservation layer and the supporting layer are mutually sleeved and abutted. The lower connecting seat is detachably connected with the supporting layer. The heating layer is provided with a first opening, and the heat preservation layer is provided with a second opening. The temperature measuring device is installed on the supporting layer, and the sensing element of the temperature measuring device is arranged on the inner side of the supporting layer. The inductive coil is controlled to operate at a target power based on a temperature difference threshold value. When the molten metal solution after purification flows into the heated high-temperature-resistant layer from the vacuum furnace, the solidification and slagging phenomenon does not occur due to the fact that the temperature of the vacuum furnace residual pipe is lower than the melting point of silver and copper elements, and the vacuum furnace residual pipe will not crack due to excessive temperature difference stress.

Description

Technical Field

[0001] This application belongs to the technical field of non-ferrous metal smelting equipment, specifically, it relates to a vacuum furnace residual tube, a temperature control method, and a computer-readable storage medium. Background Technology

[0002] Vacuum smelting is a common smelting method for non-ferrous metals. The vacuum smelting equipment discussed in this article is mainly used for vacuum separation. Its principle is as follows: under conditions below standard atmospheric pressure, metallurgical raw materials or intermediate products are heated. Utilizing the different vapor pressures of the components in the raw materials or intermediate products at a certain temperature, certain components are selectively volatilized and condensed, thereby achieving separation and purification. In the vacuum separation process of precious lead, an intermediate product of lead smelting, the difference in vapor pressure between silver, copper, and lead at the same temperature is utilized. Lead metal with lower vapor pressure will preferentially evaporate into a gaseous state, and after condensation and collection, it will be collected through a volatilization pipe. The other part, silver and copper metal with higher vapor pressure, will remain in the vacuum furnace and be collected as molten metal solution through the vacuum furnace residue pipe into a collection basin.

[0003] In conceiving and implementing this application, the inventors discovered that the temperature of the molten metal solution inside a vacuum furnace is typically above 900°C. There is a significant temperature difference between the residual tube and the heating chamber inside the vacuum furnace at room temperature. Frequent flow of the high-temperature molten metal solution through the residual tube easily leads to it being burned through and cracked. Furthermore, the molten metal solution contains a high content of copper and silver, with copper having a melting point of 1083.4°C and silver a melting point of 961.78°C. When the molten metal solution leaves the heating chamber and enters the residual tube, its temperature drops rapidly. The higher melting points of copper and silver easily solidify and slag inside the residual tube. The accumulation of slag easily causes blockage of the residual tube, requiring frequent replacement and increasing production and maintenance costs. Summary of the Invention

[0004] To address the aforementioned problems, this application provides a vacuum furnace residue tube, a temperature control method, and a computer-readable storage medium. The aim is to resolve the issue of high maintenance and replacement costs caused by cracking and slagging of the vacuum furnace residue tube during use.

[0005] To achieve the above objectives, this application provides a vacuum furnace residue tube for draining metal residues after smelting and purification in a vacuum furnace. The tube is characterized by comprising an upper connecting seat, a high-temperature resistant layer, a heating layer, a heat insulation layer, a support layer, a temperature measuring device, and a lower connecting seat. A first flange is fixedly installed at one end of the high-temperature resistant layer, and a second flange is fixedly installed at the bottom of the upper connecting seat. The upper connecting seat is bolted to the high-temperature resistant layer through the second flange and the first flange. The outer wall of the high-temperature resistant layer abuts against the inner wall of the heating layer. The outer wall of the heating layer abuts against the inner wall of the insulation layer. The outer wall of the insulation layer abuts against the inner wall of the support layer. The lower connecting seat is detachably connected to the support layer. The heating layer has a first opening, and the insulation layer has a second opening, with the second opening corresponding to the size and position of the first opening; the temperature measuring device is installed on the support layer, and the sensing element of the temperature measuring device is located inside the support layer, with the sensing element located inside the first and second openings.

[0006] The upper connecting seat is welded to the vacuum furnace and is connected to the vacuum furnace; the inner diameter of the upper connecting seat is the same as the inner diameter of the high-temperature resistant layer; both the first flange and the second flange have multiple bolt holes, and the number and position of the bolt holes of the first flange and the second flange correspond one-to-one; a sealing ring is also provided on the surface of the second flange; when installing and connecting the high-temperature resistant layer and the upper connecting seat, firstly, the first flange and the second flange are brought into contact, then the bolt holes of the first flange are aligned with the bolt holes of the second flange, and finally, bolts are inserted into the bolt holes and nuts are used to tighten them to complete the installation.

[0007] The arrangement sequence of the high-temperature resistant layer, heating layer, insulation layer, and support layer from the innermost layer to the outermost layer is as follows: high-temperature resistant layer, heating layer, insulation layer, and support layer. Simultaneously, the outer wall of the high-temperature resistant layer abuts against the inner wall of the heating layer, with a gap or clearance fit between the two components; the outer wall of the heating layer abuts against the inner wall of the insulation layer, with a gap or clearance fit between the two components; the outer wall of the insulation layer abuts against the inner wall of the support layer, with a gap or clearance fit between the two components; one end of the high-temperature resistant layer is a first flange, and the other end is a bare tube. The heating layer, insulation layer, and support layer can all be installed from the tube end of the high-temperature resistant layer.

[0008] The high-temperature resistant layer, upper connecting seat, and lower connecting seat are all made of stainless steel tubing; the heating layer can be heated using nickel-chromium strip, graphite, molybdenum, etc., or by using induction coils; the insulation layer is a tubular material made of refractory clay or other refractory raw materials; and the support layer is made of carbon steel tubing.

[0009] The bottom of the lower connector is welded to the material collection basin. The center of the lower connector has a through hole with the same diameter as the inner diameter of the high-temperature resistant layer. The top of the lower connector can be fitted onto the outer wall of the support layer. The side wall of the lower connector has multiple threaded holes. Bolts can be inserted into the threaded holes to abut against the outer wall of the support layer. Multiple bolts abut against the outer wall of the support layer from multiple directions to achieve the installation and fixation of the lower connector and the support layer.

[0010] The temperature measuring device is installed on the support layer, and the insulation layer can be used as a barrier to prevent the high temperature generated by the high temperature layer and the heating layer from damaging the temperature measuring device. At the same time, the installation on the support layer facilitates inspection and maintenance. The heating layer has a first opening and the insulation layer has a second opening to prevent the heating layer and the insulation layer from blocking the sensing element of the temperature measuring device and affecting the temperature measuring device's monitoring of the temperature of the high temperature layer.

[0011] In some designs, a first limiting plate is fixedly installed on the outer wall of the high-temperature resistant layer, located below the first flange. The first limiting plate is used to limit the heating layer, insulation layer, and support layer.

[0012] In some designs, the high-temperature resistant layer is made of 316 stainless steel, and the inner and outer surfaces of the high-temperature resistant layer are electroplated with molybdenum.

[0013] In some designs, the heating layer includes a mounting bracket, an induction coil, and a control module. The induction coil is mounted inside the mounting bracket and is electrically connected to the control module. A first opening is provided on the mounting bracket, which also has a first through hole for the resistance wire of the induction coil to pass through. The induction coil and the control module are supported and fixed by the mounting bracket.

[0014] Furthermore, the insulation layer is provided with a second through hole corresponding to the first through hole; the support layer is provided with a third through hole corresponding to the first through hole.

[0015] Furthermore, the resistance wires of the induction coil are only arranged at both ends of the material to be heated, while the resistance wires in the middle are only used to connect the resistance wire coils at both ends.

[0016] In some designs, the vacuum furnace residual tube also includes a compensator, with a third flange and a fourth flange fixedly installed at both ends of the compensator; the third flange is bolted to the first flange; and the fourth flange is bolted to the second flange.

[0017] Expansion joints, also known as compensators or expansion joints, consist of bellows, end pipes, supports, flanges, conduits, and other accessories that form their working body. Expansion joints are flexible structures installed on container shells or pipelines to compensate for additional stress caused by temperature differences and mechanical vibrations. They utilize the effective expansion and contraction of the bellows, the main working body, to absorb dimensional changes in pipelines, conduits, and containers caused by thermal expansion and contraction, or to compensate for axial, lateral, and angular displacements. They also prevent deformation or damage to pipelines and containers due to thermal expansion or temperature stress during heating.

[0018] In some designs, the lower connecting seat includes an upper connecting part, a lower connecting part, a first platform, a second platform, a fourth through hole, and a clearance opening; the upper connecting part and the lower connecting part are fixedly connected; the upper connecting part is an upward-opening circular groove structure, and the first platform is the bottom surface of the circular groove of the upper connecting part; the lower connecting part is a cylindrical structure, and the second platform is the top surface of the lower connecting part, communicating with the first platform; the fourth through hole and the clearance opening are both located on the side wall of the upper connecting part. The first platform can limit the heating layer, insulation layer, and support layer; the second platform is used to abut against the high-temperature resistant layer.

[0019] Furthermore, to achieve the above objectives, this application also provides a temperature control method for a vacuum furnace residual tube, the method comprising: Obtain the temperature value collected by the temperature measuring device; Determine the temperature difference between the temperature value and the preset temperature threshold; When the temperature difference is greater than a preset temperature difference threshold, the induction coil is controlled to operate at the target induction power.

[0020] Furthermore, the step of controlling the induction coil to operate at the target induced power includes: Obtain the mapping between the temperature difference and the temperature change corresponding to the heating layer; Based on the temperature change mapping, the target sensing power value corresponding to the current temperature difference is determined; The induced current power that meets the target induced power value is determined as the target induced power, and the induction coil is controlled to operate at the target induced power.

[0021] In addition, to achieve the above objectives, this application also provides a computer-readable storage medium storing a temperature control program for a vacuum furnace residual tube, wherein when the temperature control program for the vacuum furnace residual tube is executed by a processor, the program implements the steps of a temperature control method for the vacuum furnace residual tube.

[0022] The beneficial effects of this application are as follows: After the vacuum furnace has finished smelting and purifying silver and copper, when the purified molten metal solution needs to be guided into the accumulation basin through the vacuum furnace residual tube, the sensing element of the temperature measuring device monitors the real-time temperature of the high-temperature resistant layer. The heating layer compares the temperature value collected by the temperature measuring device with the preset temperature threshold. When the temperature difference is greater than the preset temperature difference threshold, the heating layer begins to heat the high-temperature resistant layer. At the same time, the insulation layer can keep the overall temperature of the heated high-temperature resistant layer within the preset temperature threshold range. When the molten metal solution flows from the vacuum furnace into the vacuum furnace residual tube, the molten metal... The solution will not solidify or slag due to the temperature of the vacuum furnace residual tube being lower than the melting point of silver and copper. Furthermore, the high-temperature resistant layer will not experience increased axial load due to excessive temperature difference between the vacuum furnace and the residual tube wall, thus preventing thermal stress on the residual tube and potential cracking. Finally, the upper and lower connecting seats are welded and fixed to the vacuum furnace and the material accumulation basin, respectively. The upper connecting seat and the high-temperature resistant layer, as well as the lower connecting seat and the support layer, are detachable, facilitating maintenance and replacement during subsequent upkeep, reducing the difficulty of replacing the vacuum furnace residual tube and lowering maintenance costs. Attached Figure Description

[0023] To more clearly illustrate the technical solutions of the embodiments of this application, the drawings used in the description of the embodiments will be briefly introduced below. Obviously, the drawings described below are only some embodiments of this application. For those skilled in the art, other drawings can be obtained based on these drawings without creative effort.

[0024] Figure 1 This is a perspective schematic diagram of one embodiment of the vacuum furnace residual tube of this application; Figure 2 This is a cross-sectional view of one embodiment of the vacuum furnace residual tube of this application; Figure 3 This is a perspective view of another embodiment of the vacuum furnace residual tube of this application; Figure 4 This is a cross-sectional view of another embodiment of the vacuum furnace residual tube of this application; Figure 5 This is a schematic diagram of the upper connecting seat 1 in one embodiment of this application; Figure 6 This is a schematic diagram of the structure of the high-temperature resistant layer 2 in one embodiment of this application; Figure 7 This is a schematic diagram of the structure of the heating layer 3 in one embodiment of this application; Figure 8 This is a schematic diagram of the arrangement of the induction coil 32 in one embodiment of this application; Figure 9 This is a schematic diagram of the structure of the insulation layer 4 in one embodiment of this application; Figure 10 This is a schematic diagram of the structure of the support layer 5 in one embodiment of this application; Figure 11 This is a schematic diagram of the structure of the lower connecting seat 7 in one embodiment of this application; Figure 12 This is a schematic diagram of the structure of compensator 8 in one embodiment of this application; Figure 13 This is a schematic diagram of the hardware operating environment of the vacuum furnace residual tube involved in the embodiments of this application; In the diagram, 1. Upper connecting seat; 11. Second flange; 2. High-temperature resistant layer; 21. First flange; 22. First limiting plate; 3. Heating layer; 31. Mounting bracket; 311. First opening; 312. First through hole; 32. Induction coil; 33. Control module; 4. Insulation layer; 41. Second opening; 42. Second through hole; 5. Support layer; 51. Third through hole; 6. Temperature measuring device; 61. Sensing element; 7. Lower connecting seat; 71. First platform; 72. Second platform; 73. Fourth through hole; 74. Clearance opening; 75. Upper connecting part; 76. Lower connecting part; 8. Compensator; 81. Third flange; 82. Fourth flange; 1001. Processor; 1002. Communication bus; 1003. User interface; 1004. Network interface; 1005. Memory. Detailed Implementation

[0025] In the description of this application, it should be understood that the terms "center", "longitudinal", "lateral", "length", "width", "thickness", "upper", "lower", "front", "rear", "left", "right", "vertical", "horizontal", "top", "bottom", "inner", "outer", "clockwise", "counterclockwise", "axial", "radial", "circumferential", etc., indicating the orientation or positional relationship based on the orientation or positional relationship shown in the accompanying drawings, are only for the convenience of describing this application and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, or be constructed and operated in a specific orientation, and therefore should not be construed as a limitation of this application.

[0026] Furthermore, the terms "first" and "second" are used for descriptive purposes only and should not be construed as indicating or implying relative importance or implicitly specifying the number of technical features indicated. Thus, a feature defined as "first" or "second" may explicitly or implicitly include at least one of that feature. In the description of this application, "multiple" means at least two, such as two, three, etc., unless otherwise explicitly specified.

[0027] In this application, unless otherwise expressly specified and limited, the terms "installation," "connection," "linking," and "fixing," etc., should be interpreted broadly. For example, they can refer to a fixed connection, a detachable connection, or an integral part; they can refer to a mechanical connection, an electrical connection, or a connection that allows communication between components; they can refer to a direct connection or an indirect connection through an intermediate medium; they can refer to the internal communication of two components or the interaction between two components, unless otherwise expressly limited. Those skilled in the art can understand the specific meaning of the above terms in this application based on the specific circumstances.

[0028] In this application, unless otherwise expressly specified and limited, "above" or "below" the second feature can mean that the first feature is in direct contact with the second feature, or that the first feature is in indirect contact with the second feature through an intermediate medium. Furthermore, "above," "on top of," and "over" the second feature can mean that the first feature is directly above or diagonally above the second feature, or simply that the first feature is at a higher horizontal level than the second feature. "Below," "below," and "under" the second feature can mean that the first feature is directly below or diagonally below the second feature, or simply that the first feature is at a lower horizontal level than the second feature.

[0029] In this application, the terms "one embodiment," "some embodiments," "example," "specific example," or "some examples," etc., refer to a specific feature, structure, material, or characteristic described in connection with that embodiment or example, which is included in at least one embodiment or example of this application. In this specification, the illustrative expressions of the above terms do not necessarily refer to the same embodiment or example. Furthermore, the specific features, structures, materials, or characteristics described may be combined in any suitable manner in one or more embodiments or examples. Moreover, without contradiction, those skilled in the art can combine and integrate the different embodiments or examples described in this specification, as well as the features of different embodiments or examples.

[0030] Although embodiments of this application have been shown and described above, it is understood that the above embodiments are exemplary and should not be construed as limiting this application. Those skilled in the art can make changes, modifications, substitutions and variations to the above embodiments within the scope of this application.

[0031] The above description is merely an optional embodiment of this application and is not intended to limit this application. Any modifications, equivalent substitutions, improvements, etc., made within the spirit and principles of this application should be included within the protection scope of this application.

[0032] As one implementation scheme, Figure 1 This is a perspective view of one embodiment of the vacuum furnace residual tube of this application; Figure 2 for Figure 1 A cross-sectional view of the embodiment shown; Figure 5 This is a schematic diagram of the upper connecting seat 1 in one embodiment of this application; Figure 6 This is a schematic diagram of the structure of the high-temperature resistant layer 2 in one embodiment of this application; Figure 9 This is a schematic diagram of the structure of the insulation layer 4 in one embodiment of this application; Figure 10 This is a schematic diagram of the structure of the support layer 5 in one embodiment of this application; Figure 11 This is a schematic diagram of the structure of the lower connecting seat 7 in one embodiment of this application.

[0033] Please see Figure 1 , 2 5, 6, 9, 10, 11, This application provides a vacuum furnace residue tube, including an upper connecting seat 1, a high temperature resistant layer 2, a heating layer 3, a heat insulation layer 4, a support layer 5, a temperature measuring device 6, and a lower connecting seat 7; A first flange 21 is fixedly installed at one end of the high-temperature resistant layer 2, and a second flange 11 is fixedly installed at the bottom of the upper connecting seat 1. The upper connecting seat 1 is bolted to the high-temperature resistant layer 2 through the second flange 11 and the first flange 21. The outer wall of the high-temperature resistant layer 2 abuts against the inner wall of the heating layer 3. The outer wall of the heating layer 3 abuts against the inner wall of the insulation layer 4. The outer wall of the insulation layer 4 abuts against the inner wall of the support layer 5. The lower connecting seat 7 is detachably connected to the support layer 5. The heating layer 3 is provided with a first opening 311, and the heat insulation layer 4 is provided with a second opening 41, and the size and opening position of the second opening 41 correspond to the first opening 311; the temperature measuring device 6 is installed on the support layer 5, and the sensing element 61 of the temperature measuring device 6 is located inside the support layer 5, and the sensing element 61 is located inside the first opening 311 and the second opening 41.

[0034] The upper connecting seat 1 is welded to the vacuum furnace and is connected to the vacuum furnace; the inner diameter of the upper connecting seat 1 is the same as the inner diameter of the high-temperature resistant layer 2; both the first flange 21 and the second flange 11 have multiple bolt holes, and the number and position of the bolt holes of the first flange 21 and the second flange 11 correspond one-to-one; a sealing ring is also provided on the surface of the second flange 11; when the high-temperature resistant layer 2 is installed and connected to the upper connecting seat 1, the first flange 21 and the second flange 11 are first brought into contact, then the bolt holes of the first flange 21 are aligned with the bolt holes of the second flange 11, and finally bolts are inserted into the bolt holes and nuts are used to tighten them to complete the installation.

[0035] The arrangement sequence of the high-temperature resistant layer 2, heating layer 3, insulation layer 4, and support layer 5 from the innermost layer to the outermost layer is as follows: high-temperature resistant layer 2, heating layer 3, insulation layer 4, and support layer 5. Simultaneously, the outer wall of the high-temperature resistant layer 2 abuts against the inner wall of the heating layer 3, with a gap between the two components or a clearance fit. The outer wall of the heating layer 3 abuts against the inner wall of the insulation layer 4, with a gap between the two components or a clearance fit. The outer wall of the insulation layer 4 abuts against the inner wall of the support layer 5, with a gap between the two components or a clearance fit. One end of the high-temperature resistant layer 2 is a first flange 21, and the other end is a bare tube. The heating layer 3, insulation layer 4, and support layer 5 can all be installed from the tube end of the high-temperature resistant layer 2.

[0036] The high-temperature resistant layer 2, the upper connecting seat 1, and the lower connecting seat 7 are all made of stainless steel tubing; the heating layer 3 can be heated using nickel-chromium strip, graphite, molybdenum, etc. as heating materials or using induction coil 32; the insulation layer 4 is a tubular material made of refractory clay or other refractory raw materials; and the support layer 5 is a carbon steel tubing.

[0037] The bottom of the lower connecting seat 7 is welded to the material collection basin. The center of the lower connecting seat 7 has a through hole with the same diameter as the inner diameter of the high-temperature resistant layer 2. The top of the lower connecting seat 7 can be sleeved on the outer wall of the support layer 5. The side wall of the lower connecting seat 7 is provided with multiple threaded holes. When bolts are inserted into the threaded holes, they can abut against the outer wall of the support layer 5. The installation and fixation of the lower connecting seat 7 and the support layer 5 can be achieved by multiple bolts abutting against the outer wall of the support layer 5 from multiple directions.

[0038] The temperature measuring device 6 is installed on the support layer 5. The insulation layer 4 can be used as a barrier to prevent the high temperature generated by the high temperature layer 2 and the heating layer 3 from damaging the temperature measuring device 6. At the same time, the installation on the support layer 5 facilitates inspection and maintenance. The heating layer 3 is provided with a first opening 311 and the insulation layer 4 is provided with a second opening 41 to prevent the heating layer 3 and the insulation layer 4 from blocking the sensing element 61 of the temperature measuring device 6 and affecting the temperature measuring device 6's monitoring of the temperature of the high temperature layer 2.

[0039] In some designs, a first limiting plate 22 is fixedly installed on the outer wall of the high-temperature resistant layer 2, and the first limiting plate 22 is located below the first flange 21. The first limiting plate 22 can be used to position the heating layer 3, the insulation layer 4, and the support layer 5 fitted on the high-temperature resistant layer 2 during installation and to limit their movement during use.

[0040] Specifically, the distance between the first limiting plate 22 and the first flange 21 is not less than 150mm, and the reserved distance can provide operating space for tightening bolts when the first flange 21 and the second flange 11 are installed and connected.

[0041] In some designs, the high-temperature resistant layer 2 is made of 316 stainless steel, and its inner and outer surfaces are electroplated with molybdenum. 316 stainless steel, with the addition of molybdenum, has a high-temperature resistance of 1200-1300℃, superior to ordinary stainless steel; the molybdenum electroplating on the inner and outer surfaces of the high-temperature resistant layer 2 further enhances its high-temperature resistance.

[0042] As one implementation scheme, Figure 7 This is a schematic diagram of the structure of the heating layer 3 in one embodiment of this application; Figure 8 This is a schematic diagram of the arrangement of the induction coil 32 in one embodiment of this application.

[0043] like Figure 7-8 As shown, in some embodiments, the heating layer 3 includes: a mounting bracket 31, an induction coil 32, and a control module 33; the induction coil 32 is mounted inside the mounting bracket 31 and is electrically connected to the control module 33; a first opening 311 is provided on the mounting bracket 31, and the mounting bracket 31 also has a first through hole 312 for the resistance wire of the induction coil 32 to pass through. The mounting bracket 31 is used to support and fix the induction coil 32, and the control module 33 can adjust the current frequency and current power of the induction coil 32 as needed.

[0044] Specifically, the first through hole 312 is provided with two holes, one above the other. The induction coil 32 is arranged inside the mounting bracket 31. The two ends of the induction coil 32 pass through the two first through holes 312 above and below and are electrically connected to the control module 33 outside the mounting bracket 31.

[0045] Furthermore, the insulation layer 4 is provided with a second through hole 42 corresponding to the first through hole 312; the support layer 5 is provided with a third through hole 51 corresponding to the first through hole 312.

[0046] Furthermore, the resistance wire of the induction coil 32 is arranged only at both ends of the material to be heated, and the resistance wire in the middle is only used to connect the resistance wire coils at both ends. Arranging the resistance wire at both ends of the induction coil 32 can reduce the use of resistance wire and reduce costs while meeting the heating requirements of the object being heated; at the same time, leaving a gap in the middle allows the sensing element 61 of the temperature measuring device 6 to monitor the temperature of the high-temperature resistant layer 2.

[0047] As one implementation scheme, Figure 3 This is a perspective view of another embodiment of the vacuum furnace residual tube of this application; Figure 4 for Figure 3 A cross-sectional view of the embodiment shown; Figure 12 This is a schematic diagram of the structure of compensator 8 in one embodiment of this application.

[0048] like Figure 3 , 4As shown in Figure 12, in some designs, the vacuum furnace residual tube also includes a compensator 8. A third flange 81 and a fourth flange 82 are fixedly installed at both ends of the compensator 8. The third flange 81 is bolted to the first flange 21; the fourth flange 82 is bolted to the second flange 11. The compensator 8 compensates for the thermal expansion difference between the upper connecting seat 1 and the high-temperature resistant layer 2 due to their different wall temperatures, reducing their axial load and thus decreasing the thermal stress between the components, preventing strength failure.

[0049] The compensator 8, also called an expansion joint or telescoping joint, consists of bellows, end pipes, supports, flanges, conduits, and other accessories that form its working body. The compensator 8 is a flexible structure installed on the shell of a container or pipeline to compensate for additional stress caused by temperature differences and mechanical vibration. It utilizes the effective expansion and contraction deformation of its working body, the bellows, to absorb dimensional changes in pipelines, conduits, and containers caused by thermal expansion and contraction, or to compensate for axial, lateral, and angular displacements of pipelines, conduits, and containers. It can also prevent deformation or damage to pipelines and containers due to thermal expansion or temperature stress during heating.

[0050] Specifically, both the third flange 81 and the fourth flange 82 have multiple bolt holes, and the number and position of the bolt holes in the third flange 81 and the fourth flange 82 are the same as those in the first flange 21 and the second flange 11. The surfaces of the third flange 81 and the fourth flange 82 are also provided with sealing rings.

[0051] In some designs, the lower connecting seat 7 is provided with an upper connecting part 75, a lower connecting part 76, a first platform 71, a second platform 72, a fourth through hole 73, and a clearance opening 74; the upper connecting part 75 is fixedly connected to the lower connecting part 76; the upper connecting part 75 is an upward-opening circular groove structure, and the first platform 71 is the bottom surface of the circular groove of the upper connecting part 75; the lower connecting part 76 is a cylindrical structure, and the second platform 72 is the top surface of the lower connecting part 76, which communicates with the first platform 71; the fourth through hole 73 and the clearance opening 74 are both provided on the side wall of the upper connecting part 75. The first platform 71 can limit the heating layer 3, the insulation layer 4, and the support layer 5; the second platform 72 is used to abut against the high-temperature resistant layer 2; the lower connecting seat 7 and the support layer 5 can be installed and fixed by inserting a bolt into the fourth through hole 73 and making the bolt abut against the support layer 5; the clearance opening 74 is used to avoid the resistance wire of the induction coil 32.

[0052] Specifically, the fourth through hole 73 has multiple equally spaced holes, which are threaded holes for bolts to be inserted and abut against the support layer 5; the inner diameter of the groove of the upper connecting part 75 is larger than the outer diameter of the support layer 5, the inner diameter of the cylinder of the lower connecting part 76 is the same as the inner diameter of the high temperature resistant layer 2, and the diameter of the second platform 72 is the same as the outer diameter of the high temperature resistant layer 2.

[0053] As one implementation scheme, Figure 13This is a schematic diagram of the hardware operating environment of the vacuum furnace residual tube involved in the embodiments of this application.

[0054] like Figure 13 As shown, the hardware of the vacuum furnace residue tube may include: a processor 1001, such as a CPU; a memory 1005; a user interface 1003; a network interface 1004; and a communication bus 1002. The communication bus 1002 is used to establish communication between these components. The user interface 1003 may include a display screen or an input unit such as a keyboard; optionally, the user interface 1003 may also include a standard wired interface or a wireless interface. The network interface 1004 may optionally include a standard wired interface or a wireless interface (such as a Wi-Fi interface). The memory 1005 may be high-speed RAM or non-volatile memory, such as a disk drive. Optionally, the memory 1005 may also be a storage device independent of the aforementioned processor 1001.

[0055] Those skilled in the art will understand that Figure 13 The operating environment architecture of the vacuum furnace residual tube hardware device shown does not constitute a limitation on the vacuum furnace residual tube hardware device, and may include more or fewer components than shown, or combine certain components, or have different component arrangements.

[0056] like Figure 13 As shown, the memory 1005, which serves as a storage medium, may include an operating system, a network communication module, a user interface module, and a temperature control program for the vacuum furnace residual tube. The operating system is a program that manages and controls the hardware and software resources of the vacuum furnace residual tube, as well as the operation of the vacuum furnace residual tube temperature control program and other software or programs.

[0057] exist Figure 13 In the architecture of the vacuum furnace residual tube shown, the user interface 1003 is mainly used to connect to the terminal and communicate with the terminal; the network interface 1004 is mainly used to communicate with the backend server; and the processor 1001 can be used to call the vacuum furnace residual tube temperature control program stored in the memory 1005.

[0058] In this embodiment, the vacuum furnace residual tube hardware device includes: a memory 1005, a processor 1001, and a temperature control program for the vacuum furnace residual tube stored in the memory and executable on the processor, wherein: When processor 1001 calls the vacuum furnace residual tube temperature control program stored in memory 1005, it performs the following operations: Based on the hardware architecture of the vacuum furnace residual tube in the above-mentioned non-ferrous metal smelting equipment technology, an embodiment of the temperature control method for the vacuum furnace residual tube of this application is proposed.

[0059] In some embodiments, the temperature control method for the residual tube in the vacuum furnace includes the following steps: Step S10: Obtain the temperature value collected by the temperature measuring device; Step S20: Determine the temperature difference between the temperature value and the preset temperature threshold; Step S30: When the temperature difference is greater than the preset temperature difference threshold, control the induction coil to operate at the target induction power.

[0060] In this embodiment, to prevent the temperature of the molten metal solution from dropping too quickly in the vacuum furnace residual tube during the process of flowing from the vacuum furnace residual tube into the vacuum furnace cavity, causing the solution to solidify and remain in the vacuum furnace residual tube, and also to prevent the vacuum furnace residual tube itself from being damaged by the rapid temperature drop, this embodiment also provides a control module for heating the vacuum furnace residual tube. The control module includes a temperature measuring device and an induction coil. The temperature measuring device is set on the support layer of the vacuum furnace residual tube and is used to collect the temperature of the high-temperature resistant layer. The induction coil generates an alternating magnetic field through the alternating current flowing through the coil, thereby heating the vacuum furnace residual tube through the alternating magnetic field.

[0061] In this embodiment, after acquiring the temperature value collected by the temperature measuring device, the temperature difference between the temperature value and the preset temperature threshold is determined. The preset temperature threshold is characterized by the temperature when the molten metal solution enters the vacuum furnace residual tube. Optionally, the preset temperature threshold can be set to 1100 degrees Celsius.

[0062] In this embodiment, after determining the temperature difference, it is determined whether the temperature difference is greater than a preset temperature difference threshold. The preset temperature difference threshold is characterized by the temperature difference value that will cause damage to the inside of the vacuum furnace residual tube. Optionally, the preset temperature difference threshold can be set in the range of [20-50] degrees Celsius.

[0063] When the temperature difference exceeds the preset temperature difference threshold, it means that the temperature difference between the liquid inlet and the tube body of the vacuum furnace residual tube is too large. In this case, the induction coil set in the tube body of the vacuum furnace residual tube will operate with a certain value of induction power to heat the temperature of the tube body area of ​​the vacuum furnace residual tube.

[0064] It should be noted that in this embodiment, the target induction power is a variable that will be adjusted based on the size of the temperature difference, thereby causing the temperature of the residual tube body in the vacuum furnace to rise at different heating rates.

[0065] For example, in some specific embodiments, the sensing element of the temperature measuring device will monitor the temperature of the high-temperature resistant layer and collect the corresponding temperature value; the temperature measuring device will feed back the collected temperature value data to the control module, the control module will compare the fed-back temperature value with a preset temperature threshold and calculate the temperature difference, and when the temperature difference is greater than the preset temperature difference threshold, the control module will control the induction coil to operate at the target induction power.

[0066] In the technical solution provided in this embodiment, in order to avoid the molten metal solution from cooling down too quickly in the vacuum furnace residual tube during the process of flowing from the inner cavity of the vacuum furnace into the vacuum furnace residual tube, causing the molten metal solution to solidify and remain in the vacuum furnace residual tube, and also to avoid the rapid temperature drop easily damaging the tube body, a control module is set outside the vacuum furnace residual tube to heat the vacuum furnace residual tube, thereby reducing the negative impact caused by the rapid temperature change of the molten metal solution in the vacuum furnace residual tube.

[0067] In some embodiments, based on the foregoing embodiments, step S30 specifically includes: Step S31: Obtain the mapping between the temperature difference and the temperature change corresponding to the heating layer; Step S32: Based on the temperature change mapping, determine the target sensing power value corresponding to the current temperature difference; Step S33: Determine the induction power that meets the target induction power value as the target induction power, and control the induction coil to operate at the target induction power.

[0068] In this embodiment, in order to precisely control the heating temperature of the vacuum furnace residual tube and ensure that the temperature difference between the tube body and the preset temperature threshold is maintained within the preset temperature difference threshold range during the passage of the molten metal solution, the control module on the vacuum furnace residual tube in this embodiment will also calculate and statistically analyze the temperature change value of the vacuum furnace residual tube body collected by the temperature measuring device and the parameter change of the heating layer induction coil to determine the mapping between the temperature difference and the corresponding temperature change of the heating layer. The parameters of the heating layer induction coil include the current power and current frequency of the induction coil. Changing the current power and current frequency can change the Joule heat generated by the current in the heated object, thereby realizing the temperature control of the heated object.

[0069] In this embodiment, after obtaining the temperature difference and the temperature change mapping corresponding to the heating layer, the target induction power value corresponding to the current temperature difference is determined, and the induction coil is controlled to operate at the induction power value to meet the target induction power value, so that the vacuum furnace residual tube body is heated to a temperature where the temperature difference with the preset temperature threshold meets the preset temperature difference threshold.

[0070] For example, in some specific embodiments, the temperature measuring device 6 continuously monitors the temperature of the high-temperature resistant layer 2 and continuously feeds back the collected temperature value to the control module 33. The control module 33 calculates the target induction power value corresponding to the mapping between the temperature difference and the temperature change of the heating layer based on the data fed back by the temperature measuring device 6 and the induction coil 32, and controls the induction coil 32 to operate at the target induction power.

[0071] In the technical solution provided in this embodiment, in order to heat the tube body of the vacuum furnace residue tube by the induction coil, it is necessary to prevent the molten metal solution from solidifying and forming slag inside the vacuum furnace residue tube due to the rapid temperature drop when it flows from the inner cavity of the vacuum furnace into the vacuum furnace residue tube. Furthermore, an excessively large temperature difference between the tube body and the inner cavity of the vacuum furnace can easily cause damage to the tube body. At the same time, it is also necessary to control the heating temperature within a certain range to avoid damage to the tube body structure caused by the heating temperature exceeding the high temperature resistance limit of the tube body structure.

[0072] Furthermore, those skilled in the art will understand that all or part of the processes in the methods of the above embodiments can be implemented by a computer program instructing related hardware. The computer program includes program instructions and can be stored in a storage medium, which is a computer-readable storage medium. The program instructions are executed by at least one processor in the vacuum furnace residual tube hardware system to implement the process steps of the embodiments of the above methods.

[0073] Therefore, the present invention also provides a computer-readable storage medium storing a temperature control program for a vacuum furnace residual tube, wherein when the temperature control program for the vacuum furnace residual tube is executed by a processor, the program implements the various steps of the temperature control method for the vacuum furnace residual tube as described in the above embodiments.

[0074] The computer-readable storage medium can be any computer-readable storage medium capable of storing program code, such as a USB flash drive, portable hard drive, read-only memory (ROM), magnetic disk, or optical disk.

[0075] The specific implementation process of this application is as follows: First, the upper connecting seat 1 and the lower connecting seat 7 are welded to the vacuum furnace and the material collection basin respectively; the first flange 21 and the third flange 81 are connected and fastened with bolts to complete the installation of the compensator 8 and the high-temperature resistant layer 2; then the heating layer 3, the insulation layer 4, and the support layer 5 are sequentially fitted over the high-temperature resistant layer 2 and abut against the first limiting plate 22; then the fourth flange 82 is connected to the second flange 11 and fastened with bolts to complete the installation of the compensator 8 and the upper connecting seat 1; finally, the lower connecting seat 7 along with the material collection basin is fitted over the support layer 5, so that the high-temperature resistant layer 2 abuts against the second platform 72, and the heating layer 3, the insulation layer 4, and the support layer 5 abut against the first platform 71, and bolts are used to fasten them through the fourth through hole 73 to complete the overall installation of the device; when the vacuum furnace is used for silver and copper smelting After refining and purification, when the purified molten metal solution needs to be guided to the collection basin through the vacuum furnace residual tube, the sensing element 61 of the temperature measuring device 6 monitors the real-time temperature of the high-temperature resistant layer 2 and feeds back the collected temperature value to the control module 33. The control module 33 compares the feedback temperature value with the preset temperature threshold. When the temperature difference is greater than the preset temperature difference threshold, it controls the induction coil 32 to heat the high-temperature resistant layer 2. At the same time, the insulation layer 4 can keep the overall temperature of the heated high-temperature resistant layer 2 within the preset temperature threshold range. When the molten metal solution flows from the vacuum furnace into the vacuum furnace residual tube, it first flows through the compensator 8 from the upper connecting seat 1, then flows into the high-temperature resistant layer 2, and then flows into the collection basin through the lower connecting seat 7, completing the collection of the molten metal solution purified by the vacuum furnace.

[0076] In summary, the beneficial effects of this application are as follows: When the vacuum furnace has finished smelting and purifying silver and copper, and the purified molten metal solution needs to be guided to the accumulation basin through the vacuum furnace residual tube, the sensing element 61 of the temperature measuring device 6 monitors the real-time temperature of the high-temperature resistant layer and feeds back the collected temperature value to the control module 33. The control module 33 compares the feedback temperature value with the preset temperature threshold. When the temperature difference is greater than the preset temperature difference threshold, it controls the induction coil 32 to heat the high-temperature resistant layer 2. At the same time, the insulation layer 4 can keep the overall temperature of the heated high-temperature resistant layer 2 within the preset temperature threshold range. When the molten metal solution flows from the vacuum furnace into the vacuum furnace residual tube, it will first flow from the upper connecting seat 1 through... The compensator 8 is used to guide the flow of the molten metal into the heated high-temperature resistant layer 2. This arrangement prevents the molten metal solution from solidifying and slagging due to the vacuum furnace residual tube temperature being lower than the melting points of silver and copper. Furthermore, the high-temperature resistant layer 2 is not affected by excessive wall temperature differences between the vacuum furnace and the vacuum furnace residual tube, which would increase the axial load and thus increase the thermal stress on the vacuum furnace residual tube, leading to strength failure and cracking. Finally, the upper connecting seat 1 and the lower connecting seat 7 are welded and fixed to the vacuum furnace and the material accumulation basin, respectively. The upper connecting seat 1 and the high-temperature resistant layer 2, and the lower connecting seat 7 and the support layer 5 are detachable connections, facilitating maintenance and replacement during subsequent maintenance processes and reducing the difficulty of replacing the vacuum furnace residual tube and the maintenance time and cost.

[0077] It should be noted that, since the storage medium provided in the embodiments of this application is the storage medium used to implement the methods of the embodiments of this application, those skilled in the art can understand the specific structure and variations of the storage medium based on the methods described in the embodiments of this application, and therefore will not be repeated here. All storage media used in the methods of the embodiments of this application fall within the scope of protection of this application.

[0078] Those skilled in the art will understand that embodiments of this application can be provided as methods, systems, or computer program products. Therefore, this application can take the form of a completely hardware embodiment, a completely software embodiment, or an embodiment combining software and hardware aspects. Furthermore, this application can take the form of a computer program product embodied on one or more computer-usable storage media (including, but not limited to, disk storage, CD-ROM, optical storage, etc.) containing computer-usable program code.

[0079] This application is described with reference to flowchart illustrations and / or block diagrams of methods, apparatus (systems), and computer program products according to embodiments of this application. It will be understood that each block of the flowchart illustrations and / or block diagrams, and combinations of blocks in the flowchart illustrations and / or block diagrams, can be implemented by computer program instructions. These computer program instructions can be provided to a processor of a general-purpose computer, special-purpose computer, embedded processor, or other programmable data processing apparatus to produce a machine, such that the instructions, which execute via the processor of the computer or other programmable data processing apparatus, generate instructions for implementing the flowchart... Figure 1 One or more processes and / or boxes Figure 1 A device that provides the functions specified in one or more boxes.

[0080] These computer program instructions may also be stored in a computer-readable storage medium that can direct a computer or other programmable data processing device to function in a particular manner, such that the instructions stored in the computer-readable storage medium produce an article of manufacture including instruction means, which are implemented in a process Figure 1 One or more processes and / or boxes Figure 1 The function specified in one or more boxes.

[0081] These computer program instructions may also be loaded onto a computer or other programmable data processing equipment to cause a series of operational steps to be performed on the computer or other programmable equipment to produce a computer-implemented process, thereby providing instructions that execute on the computer or other programmable equipment for implementing the process. Figure 1 One or more processes and / or boxes Figure 1 The steps of the function specified in one or more boxes.

[0082] It should be noted that any reference signs placed between parentheses in the claims should not be construed as limiting the claims. The word "comprising" does not exclude the presence of components or steps not listed in the claims. The word "a" or "an" preceding a component does not exclude the presence of a plurality of such components. This application can be implemented by means of hardware comprising several different components and by means of a suitably programmed computer. In a unit claim enumerating several means, several of these means may be embodied by the same item of hardware. The use of the words first, second, and third, etc., does not indicate any order. These words can be interpreted as names.

[0083] Although preferred embodiments of this application have been described, those skilled in the art, upon learning the basic inventive concept, can make other changes and modifications to these embodiments. Therefore, the appended claims are intended to be interpreted as including the preferred embodiments as well as all changes and modifications falling within the scope of this application.

[0084] Obviously, those skilled in the art can make various modifications and variations to this application without departing from the spirit and scope of this application. Therefore, if such modifications and variations fall within the scope of the claims of this application and their equivalents, this application also intends to include such modifications and variations.

Claims

1. A vacuum furnace residue tube for guiding metal residues after vacuum furnace smelting and purification, characterized in that: It includes an upper connecting seat (1), a high-temperature resistant layer (2), a heating layer (3), a heat insulation layer (4), a support layer (5), a temperature measuring device (6), and a lower connecting seat (7); A first flange (21) is fixedly installed at one end of the high-temperature resistant layer (2), and a second flange (11) is fixedly installed at the bottom of the upper connecting seat (1). The upper connecting seat (1) is bolted to the high-temperature resistant layer (2) through the second flange (11) and the first flange (21). The outer wall of the high-temperature resistant layer (2) abuts against the inner wall of the heating layer (3). The outer wall of the heating layer (3) abuts against the inner wall of the insulation layer (4). The outer wall of the insulation layer (4) abuts against the inner wall of the support layer (5). The lower connecting seat (7) is detachably connected to the support layer (5). The heating layer (3) is provided with a first opening (311), and the insulation layer (4) is provided with a second opening (41). The size and opening position of the second opening (41) correspond to those of the first opening (311). The temperature measuring device (6) is installed on the support layer (5). The sensing element (61) of the temperature measuring device (6) is located inside the support layer (5), and the sensing element (61) is located inside the first opening (311) and the second opening (41).

2. The vacuum furnace residual tube according to claim 1, characterized in that: A first limiting plate (22) is fixedly installed on the outer wall of the high temperature resistant layer (2), and the first limiting plate (22) is located below the first flange (21).

3. The vacuum furnace residual tube according to claim 2, characterized in that: The high-temperature resistant layer (2) is made of 316 stainless steel and the inner and outer surfaces of the high-temperature resistant layer (2) are electroplated with molybdenum.

4. The vacuum furnace residual tube according to claim 1, characterized in that: The heating layer (3) includes: a mounting bracket (31), an induction coil (32), and a control module (33); the induction coil (32) is installed in the mounting bracket (31), and the induction coil (32) is electrically connected to the control module (33); a first opening (311) is provided on the mounting bracket (31), and the mounting bracket (31) is also provided with a first through hole (312) for the resistance wire of the induction coil (32) to pass through.

5. The vacuum furnace residual tube according to claim 4, characterized in that: The resistance wire of the induction coil (32) is arranged only at both ends of the material to be heated, and the resistance wire in the middle part is only used to connect the resistance wire coils at both ends.

6. The vacuum furnace residual tube according to claim 1, characterized in that: It also includes a compensator (8), with a third flange (81) and a fourth flange (82) fixedly installed at both ends of the compensator (8); the third flange (81) is bolted to the first flange (21); and the fourth flange (82) is bolted to the second flange (11).

7. The vacuum furnace residual tube according to claim 5, characterized in that: The lower connecting seat (7) is provided with an upper connecting part (75), a lower connecting part (76), a first platform (71), a second platform (72), a fourth through hole (73), and a clearance opening (74); the upper connecting part (75) is fixedly connected to the lower connecting part (76); the upper connecting part (75) is a circular groove structure with an upward opening, and the first platform (71) is the bottom surface of the circular groove of the upper connecting part (75); the lower connecting part (76) is a cylindrical structure, and the second platform (72) is the top surface of the lower connecting part (76), and the second platform (72) is connected to the first platform (71); the fourth through hole (73) and the clearance opening (74) are both provided on the side wall of the upper connecting part (75).

8. A method for temperature control of a residual tube in a vacuum furnace, characterized in that: Applied to the vacuum furnace residual tube as described in any one of claims 1 to 7, the method comprises: Obtain the temperature value collected by the temperature measuring device; Determine the temperature difference between the temperature value and the preset temperature threshold; When the temperature difference is greater than a preset temperature difference threshold, the induction coil is controlled to operate at the target induction power.

9. The method as described in claim 8, characterized in that, The step of controlling the induction coil to operate at the target induced power includes: Obtain the mapping between the temperature difference and the temperature change corresponding to the heating layer; Based on the temperature change mapping, the target sensing power value corresponding to the current temperature difference is determined; The induced current power that meets the target induced power value is determined as the target induced power, and the induction coil is controlled to operate at the target induced power.

10. A computer-readable storage medium, characterized in that, The computer-readable storage medium stores a temperature control program for a vacuum furnace residual tube, which, when executed by a processor, implements the steps of the temperature control method for a vacuum furnace residual tube as described in any one of claims 8 to 9.

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