Anode carbon block having mortise-and-tenon connection

Abstract

An anode carbon block having a mortise-and-tenon connection. Anode conductive bosses or anode conductive grooves which can be in load-bearing mortise-and-tenon connection and conductive connection with anode conductive crossbeams of anode conductive metal devices are constructed at said anode carbon block; and the anode conductive bosses or the anode conductive grooves on the anode carbon block are formed by: first during vibration molding, using rectangular inverted-boss groove pressing dies arranged on an upper molding pressing plate of a vibration molding machine to form blank shapes of the anode conductive bosses or the anode conductive grooves formed in the top of the anode carbon block, then placing and fixing an anode carbon block blank on a planer milling machine, and using an electric horizontal rotary milling cutter to perform shaping finish machining on side surfaces of the anode conductive bosses and the anode conductive grooves, so as to finish machining and manufacturing of an anode carbon block finished product having a mortise-and-tenon connection.

Description

A mortise and tenon joint type anode carbon block Technical Field:

[0001] A tenon-and-mortise structure anode carbon block is an anode carbon material component assembled at the bottom of the conductive metal anode device of an aluminum electrolysis cell to participate in the thermo-electrochemical reaction of the aluminum electrolysis cell. Background technology:

[0002] The anode conductive device of an aluminum electrolytic cell is a crucial core component in aluminum electrolytic production, assembled from two main parts: the anode conductive metal device and the anode carbon block. The anode carbon block is considered the "heart" of aluminum electrolysis. The structural configuration and construction method of the load-bearing and conductive connections between the anode conductive metal device and the anode carbon block are the most important core technical constraints determining how the aluminum electrolytic cell production process and anode assembly process proceed.

[0003] Currently, the commonly used aluminum electrolytic anode metal conductive device in the domestic and international aluminum electrolysis industry is mainly composed of an aluminum guide rod, an aluminum-steel composite welded sheet, and an anode steel claw. An anode carbon bowl is constructed on the anode carbon block. During the assembly of the aluminum electrolytic cell anode conductive metal device with the anode carbon block, the anode steel claw head is first placed into the circular anode carbon bowl with a slanted groove on the upper part of the anode carbon block. Then, by heating and melting pig iron, a transitional connecting piece, a pig iron ring, is formed between the anode steel claw head and the circular annular groove with a slanted groove, providing both load-bearing and conductive connections. The inclined boss formed on the outer side of the phosphorus iron ring and the anode metal conductive device realize the function of supporting the weight of the anode carbon block. The contraction and thermal expansion of the phosphorus iron ring realize the conductive connection between the anode steel claw and the anode carbon block. Then, in the electrolysis production process, the assembled anode carbon block steel claw assembly, i.e. the anode conductive device, is installed and fixed on the anode busbar of the aluminum electrolysis cell using a small box clamp. This fixes the anode carbon block in the electrolyte layer of the aluminum electrolysis cell and conducts the large anode current of the aluminum electrolysis cell to the anode carbon block, enabling it to participate in the electrolytic thermo-electrochemical reaction of the aluminum electrolysis cell.

[0004] The production process of aluminum electrolysis involves the continuous consumption of anode carbon blocks during electrolysis. When the anode carbon blocks are consumed to the residual electrode stage in the thermo-electrochemical reaction, and the electrolyte in the electrolytic cell threatens the anode steel claws, the residual anode carbon blocks and the upper anode metal conductive device must be removed from the electrolytic cell. A new set of high anode conductivity devices is then installed to continue participating in the thermo-electrochemical reaction. The anode conductive metal device is a reusable component. During the recycling process, i.e., during the anode assembly production process, the residual anode carbon blocks and phosphorus iron rings must be separated from the anode steel claws by mechanical pressing or manual processing. Then, a new anode carbon block is cast onto the anode steel claws to form a new anode carbon block steel claw assembly for repeated recycling.

[0005] Currently, the commonly used anode conductive devices in the domestic and international electrolytic aluminum industry, which employ metal anode steel claws and anode carbon blocks assembled with phosphorus iron rings, have the following main technical drawbacks: First, they waste electrical energy during the melting of pig iron and anode assembly. Second, using phosphorus iron rings as a conductive medium connection layer between the anode steel claws and the anode carbon bowl results in a high overall voltage drop during electrolysis due to the material of the phosphorus iron rings and the iron-carbon bonding method. Statistics show that the average resistance loss at this iron-carbon connection point is as high as 350 kW per ton of electrolytic aluminum during electrolysis. Third, electrolytic aluminum companies need to configure a large amount of anode assembly equipment and manpower to complete the technical support for the anode assembly process, thus increasing investment costs and production expenses in electrolytic aluminum production.

[0006] The production process of electrolytic aluminum is a high-energy-consuming process, and achieving energy-saving, emission-reducing, and low-carbon production of electrolytic aluminum is crucial. Engineers and technicians in the electrolytic aluminum industry both domestically and internationally have been continuously tackling the shortcomings of existing technologies, attempting to reduce energy consumption in electrolytic aluminum production by changing the assembly structure of the anode conductive device. According to relevant technology novelty searches and patent documents, the inventor of this patent, Gao Dejin, disclosed as early as August 2009 a research and development project on a method for clamping and connecting the upper conductive convex platform of the anode carbon block under cold, ambient temperature conditions using bolts or clamping devices with two symmetrical anode conductive vertical clamps for load-bearing and conductive connection. This clamping anode conductive device is described in Chinese Patent 200920157549.6. The technical solution is characterized by: two symmetrical conductive vertical clamping plates, one on the lower part of the aluminum guide rod with a central slit in the lower opening, are equipped with upper clamping bolts or a horizontal support clamping adjustment device; during the assembly of the anode conductive device, the two conductive vertical clamping plates are placed in the anode conductive concave grooves on both sides of the anode conductive convex platform on the upper part of the anode carbon block, and the horizontal clamping force of the clamping bolts or tightening device is adjusted to form a conductive connection and a load-bearing structural connection between the inner sides of the two anode conductive vertical clamping plates and the anode carbon block convex platform.

[0007] While this clamp-type anode conductive device allows for cold-state, room-temperature assembly of the anode conductive device, eliminating the need for hot-cast phosphorus iron rings, several issues arise. Firstly, under the high temperatures of the aluminum electrolysis cell, the two symmetrically positioned anode conductive clamping plates below the forked aluminum conductive plate experience significant plastic deformation due to the interference of lateral horizontal clamping forces and the reaction forces from the anode carbon block's convex platform. This results in substantial deformation of the rigid structure, making the anode conductive metal device less interchangeable and difficult to reuse. Secondly, the clamping strength of the anode clamping fixture on the anode conductive boss varies considerably with changes in the high-temperature electrolysis environment, leading to significant variations in the voltage drop and resistance values ​​of the anode conductive device. Therefore, this technology has not been widely adopted in the aluminum electrolysis industry.

[0008] According to foreign patent literature, Norsk Hydro ASA disclosed a technical solution for a vertical plate-type anode conductive device in May 2018, patent number US20180023206A1. The feature of this technical solution is that two rigid conductive plates are symmetrically arranged below the aluminum guide rod and the aluminum-steel composite connecting piece. The top of the anode carbon block is directly placed on the two anode conductive plates. Pre-drilled holes for load-bearing pins are made in the anode carbon block and the conductive plates. Several connecting pins are inserted into these holes to achieve the load-bearing structural connection between the conductive plates of the anode conductive metal device and the anode carbon block. Then, carbon ramming paste is used to fill the gap between the anode conductive plates and the anode conductive boss, serving as a conductive medium layer to achieve the conductive connection between the anode conductive metal device and the anode carbon block. Computer simulation and preliminary industrial test analysis show that the technical solution of the Norwegian company Hydro has technical defects such as high construction cost of the load-bearing structure of the anode conductive device, poor reliability of the load-bearing connection, and high construction cost and large voltage drop of the conductive connection due to the use of carbon ramming paste as the conductive connection medium. Therefore, there have been no public reports of the application of this patented technical solution in the electrolytic aluminum production process in the domestic and foreign electrolytic aluminum industry to date.

[0009] China is a major producer of electrolytic aluminum, accounting for approximately 60% of the world's annual electrolytic aluminum production capacity. Electrolytic aluminum production is an energy-intensive industry with high greenhouse gas emissions. As energy consumption and environmental issues in the electrolytic aluminum industry are increasingly subject to stringent policy regulations, intensifying market competition, and the expansion of my country's electrolytic aluminum industry into overseas markets, the industry urgently needs technological support for energy-saving, emission-reducing, and carbon-reducing production processes that can be industrialized. Therefore, based on summarizing previous experiences and lessons learned in electrolytic aluminum technology innovation, the inventors of this technology have developed and proposed an innovative technical solution for a tenon-and-mortise structure connection type anode conductive metal device and an anode carbon block connection structure to address the aforementioned technical deficiencies in existing anode conductive devices and promote the technological upgrading of the electrolytic aluminum industry. Summary of the Invention:

[0010] According to the above technical solution: a tenon-and-mortise structure connected anode carbon block, characterized in that: above the anode carbon block, there is an anode conductive convex platform or anode conductive concave groove that can be connected to the anode conductive crossbeam at the bottom of the anode conductive metal device of the aluminum electrolysis cell in a tenon-and-mortise structure for load-bearing and conductive connection; that is, an anode conductive convex platform or anode conductive concave groove that can be connected to the anode conductive crossbeam in a tenon-and-mortise structure is provided on the top of the anode carbon block.

[0011] According to the above technical solution: a mortise and tenon structure connection type anode carbon block, characterized in that: the cross-sectional shape of the anode conductive convex platform constructed at the top of the anode carbon block is trapezoidal with a smaller upper section and a larger lower section, or the side is provided with a rectangular groove that can be mortised and tenoned with the side of the anode conductive beam; or the side is provided with a rectangular groove with horizontal interlocking teeth that can be mortised and tenoned with the anode conductive beam.

[0012] According to the above technical solution: a tenon-and-mortise structure connected anode carbon block, characterized in that: on both sides of the upper anode conductive convex platform of the anode carbon block, there are anode conductive concave grooves that can accommodate the assembly of anode conductive metal devices; that is, the anode conductive concave groove is equipped with a corresponding anode conductive crossbeam, that is, after the anode conductive concave groove is equipped with the anode conductive crossbeam, the tenon-and-mortise structure load-bearing connection and conductive connection configuration between the anode conductive convex platform and the anode conductive concave groove can be realized.

[0013] According to the above technical solution: a mortise and tenon structure connection type anode carbon block is characterized in that: it is provided with mortise and tenon connection grooves on both sides of the rectangular anode conductive convex platform on the upper part of the anode carbon block, which are configured in a mortise and tenon structure interlocking configuration with the mortise and tenon connection protrusions on the side of the rectangular anode conductive beam.

[0014] According to the above technical solution: a mortise and tenon structure connected anode carbon block and processing method, characterized in that: a rectangular anode conductive convex platform with horizontal interlocking teeth grooves on the upper part of the anode carbon block is provided, and the horizontal interlocking teeth grooves on the side of the rectangular anode conductive crossbeam are configured in a mortise and tenon structure interlocking configuration.

[0015] According to the above technical solution: a mortise and tenon structure connection type anode carbon block, characterized in that: the anode conductive concave groove provided on the side of the anode conductive concave groove has a reserved gap that can accommodate the anode conductive crossbeam for assembly, and the anode conductive concave groove is designed to be through one or both ends of the side of the anode carbon block; thereby facilitating the processing and manufacturing of the anode carbon block conductive concave groove and the assembly with the anode conductive crossbeam.

[0016] According to the above technical solution: a mortise and tenon structure connected anode carbon block, characterized in that: a gap is reserved between the anode conductive concave groove and the anode conductive crossbeam to accommodate the anode conductive crossbeam for assembly, and the width of the gap should be less than or equal to the width value of the change in the linear expansion rate of the anode conductive crossbeam metal material under the thermal balance technology condition of electrolysis.

[0017] According to the above technical solution: a processing method for a mortise and tenon structure connected anode carbon block, characterized in that: the mortise and tenon structure connected anode carbon block is prepared by the following production process: (1) during the vibration molding process of the anode carbon block, a strip-shaped pressing boss is set below the upper forming pressure plate of the vibration molding machine, which is structurally corresponding to the anode conductive concave groove, so that during the anode carbon block molding process, the blank shape of the anode conductive protrusion or the anode conductive concave groove set on the top of the anode carbon block is first prepared;

[0018] According to the above technical solution: a processing method for a mortise and tenon structure connection type anode carbon block, characterized in that: after completing the baking process of the anode carbon block, the anode carbon block blank with a concave groove for anode conductivity or a convex platform for anode conductivity is placed and fixed on a gantry milling machine, and then the mortise and tenon connection structure on the side surface of the concave groove for anode conductivity or the convex platform for anode conductivity is shaped and precision machined by a horizontal rotary milling cutter, thereby completing the processing and manufacturing of the finished anode carbon block with a mortise and tenon connection anode conductivity convex platform or anode conductivity concave groove on the upper part.

[0019] In the production of aluminum electrolytic cells, the assembly of anode conductive devices, and the production of anode carbon blocks, the above-mentioned technical solution employs a tenon-and-mortise structure connecting the anode carbon block and the anode conductive metal device's anode conductive beam for load-bearing and conductive structural connection. This overcomes the difficulty in ensuring vertical tensile load-bearing connection of the anode conductive metal device to the anode carbon block caused by the adjustment of the horizontal bearing force of the upper conductive convex platform of the anode carbon block by two anode conductive column plates in the "clamping anode conductive device" scheme described in patent 200920157549.6 (August 2009) during the earlier technology development process. It overcomes the shortcomings of the reliability type; and also overcomes the technical solution described in the Norwegian Hydro Aluminium Company's US20180023206A1 patent, which uses drilling holes in the upper part of the anode carbon block and the anode conductive plate, and uses multiple connecting pins for through-hole connection to achieve vertical tensile load-bearing structure connection anode assembly process. Its preparation process is complicated, the tensile load-bearing structure connection is unreliable, and it cannot be reused repeatedly. It also overcomes the technical problem of using carbon rammed paste as a conductive medium to fill the gap between the anode conductive plate and the anode conductive concave groove, which leads to a high voltage drop in the iron-carbon conductive connection of the overall anode conductive device.

[0020] In the production of aluminum electrolytic cells, the assembly of anode conductive devices, and the production of anode carbon blocks, the anode carbon blocks described in this invention, with mortise and tenon joints on the upper part for anode conductive convex platforms or concave grooves, and anode conductive crossbeams with mortise and tenon joint structures, are assembled together. The resulting anode conductive device exhibits the following technological advantages: First, it enables the assembly of the anode conductive device under ambient cold operating conditions. This not only eliminates the melting of pig iron and the pressing and removal of pig iron rings in the anode assembly process, simplifying the anode assembly flow, but also significantly reduces the power consumption of the anode assembly production process, lowers the cost of pig iron materials, and reduces related process equipment investment and labor costs. Secondly, the use of mortise and tenon joints to connect and assemble the anode conductive device ensures a more reliable mechanical structure for the load-bearing connection between the anode conductive beam and the anode carbon block. Furthermore, by expanding the iron-carbon connection area between the anode conductive metal device and the anode carbon block and optimizing the conductivity of the iron-carbon interface, the voltage drop at the iron-carbon interface is reduced, ensuring the stability of its conductivity and providing technical support for energy-saving and emission-reducing electrolytic aluminum production. Thirdly, it reduces the occurrence of inward deformation of the anode steel claw during recycling, improving the anode assembly quality. Fourthly, the original anode carbon block with a slanted groove on top is replaced with an innovative anode conductive concave platform or anode conductive concave groove structure. This not only simplifies the production process of the anode carbon block but also reduces its production cost.

[0021] Therefore, the mortise and tenon structure connection type anode carbon block of the present invention not only provides a technical solution for the electrolytic aluminum industry to assemble anode conductive devices in a cold state at room temperature, but also provides a revolutionary technical solution for energy conservation and emission reduction in China's electrolytic aluminum industry that can be industrialized, and provides technical support for China's electrolytic aluminum technology to go global and seize the commanding heights of technological innovation in the international electrolytic aluminum industry. Attached image description:

[0022] The technical solution and features of a mortise and tenon joint anode carbon block are made clearer through the following description of the accompanying drawings and specific embodiments.

[0023] Figure 1 is a schematic diagram of the connection structure between the anode steel claw and the anode carbon block in a commonly used anode conductive device.

[0024] Figure 2 is a diagram showing the connection structure between the trapezoidal tenon and mortise structure anode carbon block and the anode conductive device in Example 1.

[0025] Figure 3 is a diagram showing the connection between the anode carbon block and the anode conductive beam of the anode conductive convex platform with a tenon-and-mortise joint groove on the side in Example 1.

[0026] Figure 4 is a diagram showing the connection between the anode carbon block and the anode conductive beam of the anode conductive convex platform with horizontal interlocking grooves on the side in Example 1.

[0027] Figure 5 is a schematic diagram of the vibration molding process of the anode carbon block with an anode carbon bowl at the top, as commonly used in Example 2.

[0028] Figure 6 is a side view of Figure 5.

[0029] Figure 7 is a schematic diagram of the vibration forming of the anode carbon block of the present invention, which has an anode conductive concave groove or an anode conductive convex platform on the top, according to Embodiment 2.

[0030] Figure 8 is a side view of Figure 7.

[0031] Figure 9 is a schematic diagram of the process of machining the anode carbon block blank with an anode conductive concave groove or an anode conductive convex platform on a gantry milling machine according to Example 3.

[0032] Figure 10 is a schematic diagram of the finishing process of the anode carbon block with a trapezoidal anode conductive concave groove or anode conductive convex platform at the top in Example 4.

[0033] Figure 11 is a cross-sectional schematic diagram of the finished product structure of the anode carbon block in Figure 10.

[0034] Figure 12 is a schematic diagram of the finishing process of the anode carbon block in Example 5, which constructs a tenon-and-mortise connection groove on the side of the anode conductive concave groove or the anode conductive convex platform.

[0035] Figure 13 is a cross-sectional schematic diagram of the finished product structure of the anode carbon block in Figure 12.

[0036] Figure 14 is a schematic diagram of the finishing process of the horizontal interlocking tooth groove anode carbon block constructed on the side of the anode conductive concave groove or anode conductive convex platform in Example 6.

[0037] Figure 15 is a cross-sectional schematic diagram of the finished product structure of the anode carbon block in Figure 14.

[0038] The diagram shows: 1. Anode carbon block, 2. Circular anode carbon bowl, 3. Phosphorus iron ring, 4. Anode steel claw head, 5. Anode conductive metal device, 6. Anode conductive crossbeam, 7. Anode conductive convex platform, 8. Anode conductive concave groove, 9. Tenon and mortise connection groove, 10. Tenon and mortise connection boss, 11. Horizontal interlocking tooth groove, 12. Vibration forming machine, 13. Upper forming horizontal extrusion cover plate, 14. Circular carbon bowl extrusion forming mold, 15. Anode forming mold box frame, 16. Anode carbon petroleum coke mixture, 17. Rectangular inverted boss type concave groove extrusion mold, 18. Negative pressure wind exhaust dust removal system, 19. Gantry milling machine, 20. Electric rotary horizontal milling cutter head, 21. Milling cutter crossbeam frame, 22. Carbon block positioning and fixing bracket.

[0039] Detailed Implementation: The technical solution and features of the mortise and tenon structure connected anode carbon block of the present invention will be more clearly described through the following specific embodiments.

[0040] Example 1, as shown in Figure 1, in existing aluminum electrolysis cell anode conductive devices, the anode carbon block 1 is connected to the anode conductive metal device 5 via a phosphorus iron ring 3 cast inside a circular anode carbon bowl 2 on the upper part of the anode carbon block 1 for both load-bearing and conductive structure. As shown in Figure 2, in order to eliminate the anode assembly process of casting phosphorus iron rings in the existing technology, the anode conductive device of the present invention uses an anode carbon block connected by a mortise and tenon structure, which is connected to the anode conductive crossbeam 6 of the anode conductive metal device 5 for both load-bearing and conductive connection. As shown in Figure 2, the anode carbon block 1 of the present invention has a trapezoidal anode conductive convex platform (larger at the top and smaller at the bottom) and an anode conductive concave groove 4 (smaller at the top and larger at the bottom) on its top along the length or width direction. The anode conductive convex platform or concave groove is then assembled with a trapezoidal anode conductive beam, allowing the anode carbon block to be connected to the anode conductive metal device 5 via the anode conductive convex platform 7 on its top for a load-bearing conductive structure. As shown in Figure 3, the anode carbon block 1 of the present invention has tenon-and-mortise connecting grooves 9 on the side of the rectangular anode conductive convex platform 7 or anode conductive concave groove 8 along the length or width direction on its top. During anode assembly, when the anode carbon block is assembled with the anode conductive beam 6 with the tenon-and-mortise connecting protrusions 9 on its side, the anode carbon block 1 can be connected to the anode conductive beam 6 via the tenon-and-mortise connecting protrusions 10 on its top and the side of the anode conductive beam 6 for a load-bearing conductive structure. As shown in Figure 4, the anode carbon block 1 of the present invention has horizontal interlocking tooth grooves 11 on its top side along the length or width direction of the anode carbon block. During anode assembly, the anode carbon block 1 is configured to be assembled with the anode conductive beam with the horizontal interlocking tooth grooves 11 on its side, so that the anode carbon block 1 can be connected to the anode conductive beam 6 of the anode conductive metal device 5 through the anode conductive convex platform 7 set on its top.

[0041] Example 2, as shown in Figures 5 and 6, involves an anode carbon block 1 configured in a commonly used aluminum electrolytic cell anode conductive device. Its upper part has several circular anode carbon bowls 2, which are used to connect the anode carbon block 1 to anode steel claws 4 via cast phosphorus iron rings 3 within the circular anode carbon bowls 2 for conductive load-bearing structure. One of the process characteristics of manufacturing this anode carbon block 1 is that during the forming process on a vibration forming machine 12, several anode carbon bowl extrusion forming die heads 14 are fixed to the lower part of the upper horizontal extrusion cover plate 13 at the top of the vibration forming machine 12. This allows the anode carbon block 1 to be vibrated and extruded within the mold of the vibration forming die box frame 15 during vibration forming, directly forming the anode carbon bowls 2 on the upper part of the anode carbon block 1. As shown in Figures 7 and 8, one of the characteristics of the manufacturing process of the mortise and tenon structure connection type anode carbon block of the present invention is the technical modification of the vibration molding machine 12 for preparing the anode carbon block. That is, the original circular anode carbon bowl extrusion die head 14, which is set at the upper and lower ends of the vibration molding machine 12, is replaced with a rectangular or rectangular boss-type concave groove extrusion die 17, which is a trapezoid with a larger upper opening and a smaller lower opening for demolding. In order to produce the anode carbon block 1 with a conductive connecting boss 7 or conductive concave groove 8 on the upper part, when the anode carbon block 1 is formed, the anode conductive boss 7 or anode conductive concave groove 8 is directly extruded and constructed in the mold of the vibration molding die box frame 15 by the anode conductive concave groove extrusion die block 17 set at the lower end of the horizontal extrusion cover plate 13 on the upper part of the vibration molding machine 12. This facilitates the fine processing of the shape and structure of the anode conductive concave groove 8 and the anode conductive boss 7 in the subsequent machining process. Replacing the circular anode carbon bowl extrusion die with a 7-rectangular boss-type concave groove extrusion die 17 has the advantages of not only obtaining the mortise and tenon structure connection type anode carbon block required for new products, but also simplifying the manufacturing process of the upper pressure die cover plate, i.e., the horizontal extrusion cover plate 13, reducing the construction cost of its vibration molding machine, and also reducing the baking and filling costs and cleaning costs of the circular anode carbon bowl.

[0042] Example 3, as shown in Figure 9, after the anode carbon block 1 completes the roasting process, the shaped blank block of the anode carbon block 1, which has an anode conductive concave groove 8 or an anode conductive convex platform on its upper part, is transferred and fixed on a special processing equipment modified from a large gantry milling machine 19 and equipped with a negative pressure air induced draft dust removal system 18. The electric horizontal rotary milling cutter head 20 on the gantry milling machine 19 is used to perform fine processing on the anode conductive concave groove 8 and the anode conductive convex platform 7 on the upper part of the anode carbon block 1, so as to obtain the finished anode carbon block 1 with a tenon and mortise connection anode conductive concave groove 8 or anode conductive convex platform 7 that can be tightly fitted and conductively connected to the anode conductive beam 6 of the anode conductive device and is easy to install and assemble. Using an electric horizontal rotary milling cutter head 20 on a gantry milling machine to process the prefabricated rectangular anode conductive concave groove 7 can not only simplify the carbon slag cleaning process of the circular anode carbon bowl 2, but also combine the carbon slag cleaning process with the machining and forming process of the rectangular anode conductive concave groove 7, thereby reducing the overall construction cost of the anode carbon block.

[0043] Example 4, as shown in Figures 10 and 11, describes a mortise and tenon structure connection type anode carbon block. The manufacturing process is characterized by the following: during machining of the anode carbon block with a trapezoidal conductive convex platform or trapezoidal anode conductive concave groove on the upper part on a gantry milling machine, the external shape and dimensions of the cutting edge of the electric horizontal rotary milling cutter head 20 mounted on the milling cutter beam 21 are consistent with the assembly dimensions of the trapezoidal cross-section of the trapezoidal anode conductive beam 6 of the anode conductive metal device 5. The resulting anode carbon block 1, as shown in Figure 11, can be directly connected to the corresponding anode conductive beam 6 via a mortise and tenon structure for vertical tensile load-bearing and a dense conductive connection at the iron-carbon interface, as shown in Figure 2.

[0044] Example 5, as shown in Figures 11 and 12, describes a mortise and tenon structure connection type anode carbon block. The manufacturing process is characterized by the following: when machining the anode carbon block 1 with a conductive convex platform 7 or anode conductive concave groove 8 on the upper part using a gantry milling machine, the external shape and dimensions of the cutting edge of the electric horizontal rotary milling head 20 are consistent with the cross-sectional assembly dimensions of the anode conductive beam 6 with a mortise and tenon connection protrusion 10 on the side of the anode conductive metal device. The finished anode carbon block 1 exhibits a vertical tensile load-bearing connection and a dense conductive connection at the iron-carbon interface, as shown in Figure 3.

[0045] Example 6, as shown in Figures 14 and 15, describes a mortise and tenon joint type anode carbon block. The manufacturing process is characterized by the following: when machining the anode carbon block 1 (with horizontal interlocking tooth grooves on the side of the anode conductive convex platform 7 or anode conductive concave groove 8) on a gantry milling machine, the cutting edge shape and dimensions of the electric horizontal rotary milling cutter head 20 mounted on the milling cutter beam 21 are consistent with the cross-sectional assembly dimensions of the horizontal interlocking tooth groove 11 on the anode conductive beam. The finished anode carbon block 1 can be directly connected to the corresponding anode conductive beam 6 via a mortise and tenon joint for load-bearing and conductive connection, as shown in Figure 4.

Claims

1. A mortise and tenon jointed anode carbon block, characterized by: Above the anode carbon block, there is an anode conductive convex platform or anode conductive concave groove that can be connected to the anode conductive crossbeam at the bottom of the aluminum electrolytic cell anode conductive metal device in a mortise and tenon structure for load-bearing and conductive connection; that is, an anode conductive convex platform or anode conductive concave groove that can be connected to the anode conductive crossbeam in a mortise and tenon structure is provided on the top of the anode carbon block; the anode conductive convex platform or anode conductive concave groove with the mortise and tenon connection structure on the upper part of the anode carbon block is machined and shaped by a gantry milling machine with a rotary milling cutter head.

2. A dovetail jointed anode carbon block according to claim 1, characterised in that Its characteristics are: The cross-sectional shape of the anode conductive convex platform constructed at the top of the anode carbon block is trapezoidal with a smaller top and a larger bottom, or a rectangle with a mortise and tenon joint groove on the side that can be mortised and tenoned with the side of the anode conductive crossbeam; or a rectangle with a horizontal interlocking tooth groove on the side that can be mortised and tenoned with the anode conductive crossbeam.

3. A mortise and tenon jointed anode carbon block according to claim 1, wherein: On both sides of the anode conductive convex platform on the upper part of the anode carbon block, there are anode conductive concave grooves that can accommodate the assembly of the anode conductive metal device; that is, the anode conductive concave groove is equipped with the corresponding anode conductive crossbeam, and after the anode conductive concave groove is equipped with the anode conductive crossbeam, the load-bearing connection and conductive connection configuration of the mortise and tenon structure between the anode conductive convex platform and the anode conductive concave groove can be realized.

4. The mortise and tenon joint type anode carbon block according to claim 1, characterized in that: The tenon and tenon joint grooves on both sides of the rectangular anode conductive protrusion on the upper part of the anode carbon block are configured to interlock with the tenon and tenon joint protrusions on the side of the rectangular anode conductive beam.

5. A tenon-and-mortise structure connected anode carbon block according to claim 1, characterized in that: Its structure consists of a rectangular anode conductive convex platform on the upper part of the anode carbon block with horizontal interlocking teeth grooves on the side of the rectangular anode conductive crossbeam, which are configured in a mortise and tenon joint interlocking manner.

6. A tenon-and-mortise structure connected anode carbon block according to claim 1, characterized in that: The anode conductive concave groove located on the side of the anode conductive concave groove has a reserved gap that can accommodate the anode conductive crossbeam for assembly. The anode conductive concave groove is designed to be connected to one or both ends of the side of the anode carbon block. This facilitates the processing and manufacturing of the anode carbon block conductive concave groove and its assembly with the anode conductive crossbeam.

7. A tenon-and-mortise structure connected anode carbon block according to claim 1, characterized in that: A gap is reserved between the anode conductive concave groove and the anode conductive crossbeam to accommodate the anode conductive crossbeam for assembly. The width of this gap should be less than or equal to the width of the change in the linear expansion rate of the anode conductive crossbeam metal material under the thermal balance technology conditions of electrolysis.

8. A tenon-and-mortise structure connected anode carbon block according to claim 1, characterized in that: The manufacturing process of the mortise and tenon connection anode conductive convex platform or anode conductive concave groove set on the upper part of the anode carbon block is as follows: First, during the vibration molding process of the anode carbon block, a strip-shaped pressing boss with a structure corresponding to the anode conductive concave groove is set under the upper forming pressure plate of the vibration molding machine; so that the blank shape of the anode conductive convex platform or anode conductive concave groove set on the top of the anode carbon block is first prepared during the anode carbon block molding process; Second, after the anode carbon block baking process is completed, the anode carbon block blank with the anode conductive concave groove or anode conductive convex platform is placed and fixed on a gantry milling machine, and then the mortise and tenon connection structure on the side surface of the anode conductive concave groove or anode conductive convex platform is shaped and precision machined with a horizontal rotary milling cutter to complete the processing and manufacturing of the anode carbon block product with the mortise and tenon connection anode conductive convex platform or anode conductive concave groove on the upper part.

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