Anode carbon block with concave-convex groove platform at top

Abstract

The anode carbon block with the concave-convex groove tables at the top is mainly applied to assembly configuration of an anode conductive device of an aluminum electrolysis cell and electrolytic aluminum production. In order to overcome the technical defects that in the prior art, a circular anode carbon bowl is constructed on an anode carbon block, then an anode steel claw head is inserted into the anode carbon bowl, and an anode conductive device formed by assembling the anode carbon block and an anode steel claw together by casting a ferrophosphorus ring is high in connection voltage drop, high in assembly energy consumption, complex in process and high in construction cost, the invention provides an anode conductive device. The invention discloses a technical scheme of a novel construction connection mode of an anode carbon block and an anode conductive metal structure. The anode carbon block is characterized in that an upper boss design of the anode carbon block is changed into a flat-top design, and two left-right symmetrical anode conductive concave grooves and an anode conductive convex platform which are used for constructing and installing an anode conductive cross beam are constructed on the flat-top anode carbon block. The invention relates to an anode conductive cross beam.

Description

[0001] Technical field: An anode carbon block with a concave-convex groove platform on the top is mainly used for the assembly configuration of the anode conductive device of an aluminum electrolytic cell and the electrolytic aluminum production.

[0002] Technical background: The anode carbon block in the electrolytic aluminum production process is not only a raw material component participating in the thermoelectrochemical replacement reaction of aluminum electrolysis, but also an anode conductive component that conducts the anode current to the electrolyte. In order to realize its function of conducting the anode current of the anode busbar of the aluminum electrolytic cell to the anode carbon block, the existing technology is to prefabricate a number of concave circular carbon bowls on the upper part of the anode carbon block, and then adopt the method of casting phosphorus pig iron and casting phosphorus iron rings to connect the anode steel claw head arranged at the bottom of the anode metal conductive device with the anode carbon block for conductive structure, so as to form an integral anode conductive device composed of an aluminum guide rod and an explosion welding piece on the upper part and an anode steel claw and anode carbon on the lower part.

[0003] The existing aluminum electrolytic cell uses anode steel claws and anode carbon to construct an anode conductive device by casting phosphorus pig iron. The anode conductive device has the following technical defects: first, a large amount of electric energy is consumed to melt phosphorus pig iron during anode assembly; second, a large amount of manpower, material resources and mechanical equipment are required for assembly; third, the connection resistance value between the anode carbon block and the anode steel claw head and the voltage drop of the iron-carbon structure are high, and a large amount of electrolytic DC power consumption will be lost during the electrolysis process, resulting in a decrease in the current efficiency of the aluminum electrolytic cell.

[0004] In view of this, the engineers and technicians in the electrolytic aluminum industry at home and abroad are trying to reduce the voltage drop of the iron-carbon connection between the anode steel claw and the anode carbon block as one of the key research topics to reduce the energy consumption of electrolysis in order to achieve energy saving, emission reduction and low carbon production of electrolytic aluminum. However, due to the structural limitations of the anode conductive device in the existing technology, it is difficult to achieve the ideal energy saving effect, and the energy saving effect is very small. So far, the electrolytic aluminum industry has been using the phosphorus iron ring casting technology.

[0005] Invention content: In order to overcome the above technical defects of the prior art that a circular anode carbon bowl is constructed on an anode carbon block, and then an anode steel claw is inserted into the anode carbon bowl, and a cast phosphorus iron ring is used to assemble the anode carbon block and the anode steel claw together to form an anode conductive device, such as high connection voltage drop, high assembly energy consumption, complex process and high construction cost, the technical solution of the present invention discloses a technical solution for the construction and connection method of a new type of anode carbon block (1) and an anode conductive metal structure.

[0006] The innovative technical solution is characterized in that the anode boss and the circular carbon bowl structure for casting phosphorus pig iron in the prior art are eliminated on the upper top of the anode carbon block, and then the upper boss design of the anode carbon block is changed to a flat top design, and two left-right symmetrical anode conductive concave grooves (2) and an anode conductive convex platform (3) for constructing and installing the anode conductive cross beam (4) are constructed on the flat top anode carbon block (1), and the side section width of the anode conductive concave groove (2) should be greater than the height of the anode conductive concave connecting groove, and then the two left-right symmetrical anode conductive cross beams (4) are assembled in the two left-right symmetrical anode conductive concave grooves (2), and the phosphorus iron ring is replaced by the anode conductive cross beam (4), and the anode carbon block (1) and the upper part of the anode conductive cross beam (4) are connected to the anode conductive column (5) and the aluminum guide rod to form a complete anode conductive device, so that the anode current of the anode busbar can be transmitted to the anode carbon block (1) during the electrolytic aluminum production process, so that it can participate in the thermoelectric chemical reaction of aluminum electrolysis.

[0007] The mechanical structure and electrical structure principle of the integrated structural connection of the anode carbon block (1) and the anode metal conductive device described in the present invention are: first, the thermal expansion coefficient of the anode conductive beam (4) is greater than that of the carbon material of the anode carbon block (1), so that the anode conductive beam (4) can produce a firm structural connection and a tight iron-carbon interface conductive connection after being assembled into the anode conductive concave groove (2). Second, the anode conductive column (5) or anode conductive plate arranged symmetrically on the upper part of the anode conductive beam (4) can be used to form a supporting force on the side wall of the anode conductive boss (3) arranged between the two symmetrical anode conductive concave grooves (2) of the anode carbon block (1), so as to implement a high-strength supporting structural connection and a tight iron-carbon interface conductive connection between the anode carbon block (1) and the anode metal conductive device.

[0008] According to the above technical solution, the basic structural shape of the anode carbon block (1) is that the flat-top anode carbon block (1) is provided with two anode conductive concave grooves (2) arranged symmetrically along the length direction of the carbon block and an anode conductive boss (3).

[0009] In order to ensure and improve the connection strength between the anode conductive cross beam (4) and the anode carbon block (1) and prevent the anode carbon block (1) from being displaced up and down and falling off from the anode conductive cross beam (4) of the anode metal conductive device, the cross section of the anode conductive concave groove can be set to a concave groove shape with a cross-sectional width greater than the height, or set to a trapezoidal groove, or a mortise and tenon concave groove structure shape with a bite groove on the side wall.

[0009] According to the above technical solution, the dimensional deviation between the cross-sectional width of the anode conductive concave groove and the assembly width between the cross-sectional widths of the anode conductive beam (4) should be smaller than the variable value of the linear width of the anode conductive beam (4) in the width direction of thermal expansion under the technical conditions of electrolytic heat working conditions.

[0010] According to the above technical solution, in order to ensure the dimensional accuracy of the anode conductive concave groove (2) in the width direction and the anode conductive cross beam (4), the anode conductive concave groove (2) arranged on the anode carbon block (1) can be obtained by planing and milling machining after the anode carbon block (1) is calcined and formed.

[0011] In the process of electrolytic aluminum production, the anode carbon block (1) provided with an anode conductive concave groove on the upper part of the anode carbon block (1) as described in the present invention can be used. Not only can the iron-carbon interface connection of the anode carbon block (1) and the anode conductive cross beam (4) be directly connected in contact with each other, but also the transition conductive connection layer cast phosphorus pig iron transition conductive connection layer between the anode steel claw and the anode carbon block (1) in the prior art can be eliminated, thereby achieving the goal of reducing the resistance value and voltage drop of the aluminum electrolytic cell structure, and reducing the equipment investment of the anode assembly production workshop and the process cost of casting phosphorus pig iron structure.

[0012] Description of the drawings: The technical features and specific implementation methods of the anode carbon block with a conductive concave-convex groove platform on the top described in the present invention will be more clearly described through the following description of the drawings and embodiments.

[0013] Figure 1 This is a front view of an anode carbon block with a concave and convex groove on the top of Example 1.

[0014] Figure 2 for Figure 1 Side view.

[0015] Figure 3 for Figure 1 Top view.

[0016] Figure 4 Side cross-sectional view of the anode carbon block of Example 1 after assembling the anode conductive beam

[0017] Figure 5 This is a front view of an anode carbon block with a concave and convex groove on the top of Example 2.

[0018] Figure 6 for Figure 5 Side view.

[0019] Figure 7 for Figure 5 Top view.

[0020] Figure 8Side cross-sectional view of the anode carbon block of Example 2 after assembling the anode conductive beam

[0013] Fig. 9 This is a front view of an anode carbon block with a concave and convex groove on the top of Example 3.

[0014] Fig.10 for Figure 1 Side view.

[0015] Fig.11 for Figure 1 Top view.

[0016] Fig.12 Side cross-sectional view of the anode carbon block of Example 3 after assembling the anode conductive beam

[0017] Fig.13 This is a front view of an anode carbon block with a concave and convex groove on the top of Example 4.

[0018] Fig.14 for Fig.13 Side view.

[0019] Fig.15 for Fig.13 Top view.

[0020] Fig.16 Side cross-sectional view of the anode carbon block of Example 4 after assembling the anode conductive beam

[0021] As shown in the figure: 1 anode carbon block, 2 anode conductive concave groove, 3 anode conductive boss, 4 anode conductive beam, 5 anode conductive column, 6 iron-carbon combined processing surface, 7 side wall concave connecting groove, 8 side wall semicircular connecting groove.

[0022] Specific implementation method: The technical features and specific implementation method of the anode carbon block (1) with a guide groove on the top described in the present invention will be more clearly described through the following drawings and embodiments.

[0023] Example 1: Figure 1 Figure 2 and Figure 3As shown, the anode carbon block (1) used for configuring a new type of anode metal conductive device described in this embodiment has the following structural features: the upper top surface of the anode carbon block (1) is a horizontal structure, and at the upper top of the anode carbon block (1), along the length direction of the anode carbon block (1), two anode conductive concave grooves (2) for installing the anode conductive cross beam (4) and an anode conductive boss (3) are symmetrically arranged on the left and right. Note: After the anode conductive cross beam (4) is constructed and installed in the anode conductive concave groove (2), its function is equivalent to the function of the phosphorus iron ring in the prior art. That is, the anode carbon block (1) can conduct the anode current on the anode busbar of the aluminum electrolytic cell to the anode carbon block (1) through the conductive connection configuration of the aluminum guide rod, the anode conductive column (5) or the anode conductive vertical plate of the anode metal conductive device, and the anode conductive cross beam (4) constructed on both sides of the anode conductive boss (3) in the anode conductive concave groove (2), so that the anode carbon block (1) can safely and reliably participate in the thermoelectrochemical reaction, such as Figure 4 shown.

[0024] like Figure 2 Figure 3 and Figure 4 As shown, in order to improve the conductivity efficiency between the anode carbon block (1) and the anode conductive beam (4) and reduce the resistance value between the two, when designing the structure of the anode carbon block (1), the characteristics of the metal material of the anode conductive beam (4) constructed in the anode conductive concave groove (2) being better than the anode carbon material, and the characteristics of the metal material having a thermal expansion coefficient greater than the graphite carbon material can be utilized. By optimizing the cross-sectional ratio of the anode conductive concave groove (2) and the metal anode conductive beam (4) and the conductive area of ​​the iron-carbon contact interface, an ideal structural structure and an ideal conductive connection method are designed and constructed. According to the above technical theory, the cross-sectional width of the anode conductive concave groove (2) should be greater than the depth of the anode conductive concave groove (2), that is, the height of the anode conductive boss (3). The error of the assembly gap matching dimension between the iron-carbon bonding interface between the anode conductive concave groove (2) and the anode conductive cross beam (4) should be smaller than the dimension of the thermal expansion linear variable of the anode conductive cross beam (4) under the hot working temperature (≤950°C) condition, so as to generate a high-strength structural connection and a tight conductive connection between the anode carbon block (1) and the anode conductive cross beam (4)(3).

[0025] like Figure 4 As shown, in order to improve the structural strength of the connection between the metal anode conductive device and the anode conductive beam (4) and the anode carbon block (1) and the density of the direct iron-carbon conductive interface between the two, the connection strength and conductive performance between the two can be improved by adjusting the horizontal adjustment gap between two anode conductive columns (5) or anode conductive clamps symmetrically arranged on the upper part of the anode conductive beam (4) to apply a clamping force.

[0026] like Figure 4 As shown, the horizontal projection of the anode conductive concave groove (2) arranged on the horizontal plane at the top of the anode carbon block (1) is in the shape of a rectangular structure with arcs at both ends.

[0027] Example 2: Figure 5 , Figure 6 , Figure 7 and Figure 8 As shown, the anode carbon block (1) with a conductive concave-convex groove platform on the top described in this embodiment 2 is basically the same as the embodiment 1, and its distinguishing technical feature is that the horizontal projection of the anode conductive concave groove (2) arranged on the horizontal plane of the top of the anode carbon block (1) is a rectangular strip structure that runs through from left to right. The main purpose of this structural design is to facilitate the mechanical processing of the anode conductive concave groove (2) so as to form an iron-carbon combined processing conductive interface (6) with relatively high matching precision and size.

[0028] Example 3: Fig. 9 , Fig.10 , Fig.11 and Fig.12 As shown, the anode carbon block (1) with a conductive concave-convex groove platform on the top described in this embodiment 3 is basically the same as the embodiment 2, and its distinguishing technical features are: in order to improve the connection structural strength between the anode carbon block (1) and the anode conductive metal device, the anode conductive concave groove (2) and the anode conductive cross beam (4) arranged on the horizontal plane of the top of the anode carbon block (1) are designed to be a trapezoidal mortise and tenon cross-section structure with a small upper opening and a large lower opening; during assembly and combination, the anode metal conductive device and the anode conductive cross beam (4) with a trapezoidal cross section can be horizontally displaced and squeezed from the side end of the anode carbon block (1) into the anode conductive concave groove (2) with a trapezoidal cross section on the upper part of the anode carbon block (1) to perform a mortise and tenon hook-type positioning and combination connection, so that the metal anode conductive device and the anode carbon block (1) are tightly and firmly connected.

[0029] Example 4: Fig.13 , Fig.14 , Fig.15 and Fig.16 As shown, the anode carbon block (1) with a conductive connection concave groove on the top described in this embodiment 4 is basically the same as that in embodiment 2, and its distinguishing technical feature is that: on the side conductive bonding interface of the anode conductive concave groove (2) and the anode conductive boss (3), a side wall concave connection groove (7) or a side wall semicircular connection groove (8) for connecting with the anode conductive beam (4) by a mortise and tenon hook structure is provided. The use of the mortise and tenon interlacing bite design structure can improve the structural connection strength and the reliability of the conductive connection between the anode carbon block (1) and the anode conductive beam (4). This prevents the anode carbon block (1) from falling off due to displacement in the height direction between the anode carbon block (1) and the anode conductive device.

Claims

1. An anode carbon block having a concave-convex groove platform on the top, characterized in that: Two left-right symmetrical anode conductive concave grooves (2) and an anode conductive convex platform (3) for assembling an anode conductive cross beam (4) are constructed on the flat-top anode carbon block (1).

2. The anode carbon block with a concave-convex groove platform on the top according to claim 1, characterized in that: The cross-sectional width of the anode conductive concave groove (2) arranged on the top of the anode carbon block is greater than or equal to the height of the anode conductive concave groove.

3. The anode carbon block with a concave-convex groove platform on the top according to claim 1, characterized in that: After the anode conductive cross beam (3) is inserted and assembled into the anode conductive concave groove (2), the anode conductive cross beam (4) and the anode carbon block can be connected firmly in structure and connected in a tight iron-carbon interface by utilizing the characteristic that the thermal expansion coefficient of the metal material of the anode conductive cross beam is greater than that of the carbon material of the anode carbon block (1).

4. The anode carbon block with a concave-convex groove platform on the top according to claim 1, characterized in that: When assembling the anode, the anode conductive uprights (5) symmetrically arranged on the upper part of the anode conductive cross beam (4) can be placed in the anode conductive concave groove (2) to form a supporting force on the side wall of the anode conductive boss (3), so that the anode carbon block (1) and the anode metal conductive device can be connected with a high-strength supporting structure and a tight conductive connection at the iron-carbon fitting interface.

5. The anode carbon block with a concave-convex groove platform on the top according to claim 1, characterized in that: The cross section of the anode conductive concave groove (2) should be set to a rectangular shape or a trapezoidal groove, or a mortise and tenon concave groove structure with a occlusal groove on the side wall.

6. The anode carbon block with a concave-convex groove platform on the top according to claim 1, characterized in that: The size assembly deviation between the cross-sectional width of the anode conductive concave groove and the anode conductive beam (4) should be smaller than the variable value of the linear width direction of the thermal expansion of the anode conductive beam (4) under the technical conditions of electrolytic heat working conditions.

7. The anode carbon block with a concave-convex groove platform on the top according to claim 1, characterized in that: In order to ensure the matching accuracy of the assembly dimensions of the anode conductive concave groove (2) and the anode conductive cross beam (4), the anode conductive concave groove (2) provided on the anode carbon block (1) can be obtained by planing and milling machining after the anode carbon block (1) is baked and formed.

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