Novel pre-baked anode of low-dropout machine

Abstract

The utility model discloses a novel pre-baked anode of a low offline machine, which comprises an anode carbon block, the anode carbon block is formed by combining a carbon block I and a carbon block II, one corner of the carbon block II is a circular arc chamfer, two corners adjacent to the circular arc chamfer are right-angle sides, and the side opposite to the circular arc chamfer is a linear chamfer. The first carbon block and the second carbon block are the same in structure and symmetrical to each other, during combination, one sides of the linear chamfers are attached to each other, and when the anode carbon blocks are symmetrically placed in an electrolytic bath, holes used for crust breaking and discharging are formed in the linear chamfers. According to the novel pre-baked anode of the low-temperature offline machine, the whole anode carbon block is produced in a separated mode, through the chamfer design, holes used for crust breaking and discharging are formed in the splicing and combining process of the anode carbon block, a gap for crust breaking and discharging does not need to be reserved in a manual butt joint mode, the installation difficulty is lowered, the installation efficiency is improved, and the technological link of reserving the crust breaking gap is reduced; and the assembly efficiency is improved.

Description

Technical Field

[0001] The utility model relates to a novel low-offline prebaked anode for electrolytic aluminum. Background Art

[0002] The quality and shape of the carbon block of the prepared anode, as the heart of the aluminum electrolysis workshop, have a great impact on the production of aluminum electrolysis. The four corners of the original anode carbon block in the length direction are conventionally designed to be rounded or right angles, which have defects. When used in electrolysis, a gap for shelling should be reserved to facilitate the unloading of alumina. When the anode carbon block is used in the electrolytic cell, the six-slot carbon block carbon bowl and steel claws will have anode depolarization, which brings great safety hazards to the electrolytic production. Utility Model Content

[0003] The purpose of the utility model is to provide a novel prebaked anode with low offline efficiency to solve the problems raised in the above-mentioned background technology.

[0004] In order to achieve the above purpose, the utility model provides the following technical solutions:

[0005] A novel low offline prebaked anode comprises an anode carbon block, wherein the anode carbon block is composed of a carbon block 1 and a carbon block 2, wherein one corner of the carbon block 2 is a circular chamfer, two corners adjacent to the circular chamfer are right angles, and the side opposite to the circular chamfer is a straight chamfer. The structures of the carbon block 1 and the carbon block 2 are identical and symmetrical to each other. When the anode carbon blocks are combined, one side of the straight chamfer fits together. When the anode carbon blocks are symmetrically placed in an electrolytic cell, the straight chamfered part forms a hole for shelling and feeding.

[0006] As a further solution of the utility model: the tops of the carbon blocks 1 and 2 are both provided with carbon bowls, and the insides of the carbon bowls are provided with mold grooves for casting and fixing with the anode steel claws, so that the carbon blocks 1 and 2 are completely combined.

[0007] As a further solution of the utility model: a spiral groove is arranged in the carbon bowl.

[0008] As a further solution of the utility model: the spiral groove spirals in the same direction, and after the molten iron is cast into the carbon bowl, it solidifies in the spiral groove to form a spiral body.

[0009] As a further solution of the utility model: the number of the spiral grooves is even, and two adjacent spiral grooves are arranged in an inner eight or an outer eight.

[0010] As a further solution of the utility model: a casting port located outside the top opening of the mold groove is opened on the top of the carbon bowl, and the top of the spiral groove is connected to the casting port.

[0011] Compared with the prior art, the beneficial effects of the utility model are:

[0012] 1. This new type of low offline prebaked anode separates the entire anode carbon block into separate pieces and forms holes for shelling and cutting materials during the splicing and assembly process through chamfering design. There is no need to reserve gaps for shelling and cutting materials manually, which reduces the difficulty of installation, improves installation efficiency, reduces the process steps of reserving gaps for shelling, and improves assembly efficiency.

[0013] 2. The new prebaked anode with low offline risk has a spiral groove design, which allows the molten iron to have a better grip on the anode carbon block after solidification, reducing the risk of offline and improving operation safety. BRIEF DESCRIPTION OF THE DRAWINGS

[0014] Figure 1 It is a schematic diagram of the structure of a new type of prebaked anode with low offline;

[0015] Figure 2 It is a schematic diagram of the structure of the anode carbon block in a new type of low offline prebaked anode;

[0016] Figure 3 This is a structural schematic diagram of a carbon block 2 in Example 1 of a novel low offline prebaked anode;

[0017] Figure 4 This is a schematic diagram of the structure of carbon block 2 in Example 2 of a new type of low offline prebaked anode.

[0018] In the figure: 1. Carbon block one; 2. Carbon block two; 3. Carbon bowl; 4. Die groove; 5. Straight chamfer; 6. Casting port; 7. Arc chamfer; 8. Spiral groove; 9. Anode steel claw; 10. Anode busbar; 11. Shell breaker; 12. Feeder; 13. Shell; 14. Cathode steel rod; 15. Insulating material; 16. Side carbon block; 17. Bottom carbon block; 18. Carbon lining; 19. Cover plate. DETAILED DESCRIPTION

[0019] Embodiment 1

[0020] See also Figures 1 to 3In the embodiment of the utility model, a low offline novel prebaked anode includes an anode carbon block, which is composed of a carbon block 1 and a carbon block 2. One corner of the carbon block 2 is a circular chamfer 7, two corners adjacent to the circular chamfer 7 are right angles, and the side opposite to the circular chamfer 7 is a straight chamfer 5. The structures of the carbon block 1 and the carbon block 2 are the same and symmetrical to each other. When combined, one side of the straight chamfer fits each other. When the anode carbon block is symmetrically placed in the electrolytic cell, the straight chamfer part forms a hole for shelling and feeding. The angle between the two surfaces of the carbon block 1 and the carbon block 2 that are completely in contact with the electrolytic cell is set to the circular chamfer 7. The circular chamfer 7 is usually R70 fillet to reduce burrs affecting installation. The two right-angled sides adjacent to the circular chamfer 7 are in contact with the carbon block. In order to avoid excess gaps caused by chamfering, a right-angled side design is adopted. The diagonal side of the circular chamfer 7 is a straight chamfer 5. The straight chamfer 5 is usually a 70×45° right angle. The carbon block 1 and the carbon block 2 are combined and arranged to form a square hole at the center. The hole is used for shelling and cutting. The installation of the anode carbon block does not require reserved shelling gaps, which reduces the difficulty of installation, improves installation efficiency, reduces the process steps of reserving shelling gaps, and improves assembly efficiency.

[0021] The electrolytic cell is composed of an outer shell 13, a carbon lining 18, a cathode steel rod 14, a bottom carbon block 17, a side carbon block 16, an insulating material 15 and a cover plate 19. There is an electrolyte in the electrolytic cell, and the anode carbon block is suspended in the electrolyte. A feeder 12 and a shell breaker 11 are installed on the cover plate 19, and both the feeder 12 and the shell breaker 11 are located directly above the hole.

[0022] As a further solution of the utility model: a carbon bowl 3 is arranged on the top of the carbon block 1 and the carbon block 2, and a mold groove 4 for casting and fixing with the anode steel claw 9 is opened inside the carbon bowl 3. The anode busbar 10 is installed on the top of the anode steel claw 9, so that the carbon block 1 and the carbon block 2 are combined. The carbon bowl 3 is an important structure for casting and fixing the anode steel claw 9 and the carbon block. Usually, for the convenience of installation and casting, the mold groove 4 will be set with a structure in which the top diameter is slightly larger than the bottom diameter, which will cause the anode steel claw 9 and the carbon block to be not cast firmly enough, resulting in the anode carbon block being offline.

[0023] As a further solution of the utility model: a spiral groove 8 is provided in the carbon bowl 3, and molten iron is added into the spiral groove 8 during the casting process, so that the model formed after solidification can better grasp the carbon block, reducing the probability of offline.

[0024] As a further solution of the utility model: the spiral groove 8 spirals in a uniform direction, and after the molten iron is cast into the carbon bowl 3, it solidifies in the spiral groove 8 to form a spiral body. The spiral groove 8 spirals in a uniform direction so that after the molten iron is cast and fixed, a larger angle spiral body is formed inside, which effectively avoids offline when the molten iron solidifies.

[0025] As a further solution of the utility model: a casting port 6 is provided on the top of the carbon bowl 3 and is located outside the top opening of the mold groove 4. The top of the spiral groove 8 is connected to the casting port 6. The connecting port is used to cast molten iron in the casting port 6. The molten iron can directly enter the spiral groove 8 through the opening, thereby preventing the anode steel claw from being close to the spiral groove 8, which would prevent the molten iron from entering the spiral groove 8 and solidifying, resulting in insufficient grip and offline.

[0026] Embodiment 2

[0027] See also Figures 1 to 4 In an embodiment of the utility model, a new type of low offline prebaked anode also includes a spiral groove 8 with an even number, and two adjacent spiral grooves 8 are arranged in an inner eight or outer eight layout. The spiral grooves 8 are designed to have a spiral in the same direction, so that the spiral grooves 8 can be well handled during the pulling and weighing process. Even if the spiral grooves 8 are damaged due to overload, the pulling and removal operation is not affected. This design is safe and reliable.

[0028] It should be noted that the above embodiments all belong to the same utility model concept, and the description of each embodiment has its own focus. For matters that are not described in detail in some embodiments, reference can be made to the description in other embodiments.

[0029] The above-mentioned embodiments only express the implementation methods of the utility model, and the descriptions thereof are relatively specific and detailed, but they cannot be understood as limiting the scope of the utility model patent. It should be pointed out that for ordinary technicians in this field, several modifications and improvements can be made without departing from the concept of the utility model, and these all belong to the protection scope of the utility model. Therefore, the protection scope of the utility model patent shall be based on the attached claims.

Claims

1. A novel low offline prebaked anode, comprising an anode carbon block, characterized in that: The anode carbon block is composed of a carbon block 1 (1) and a carbon block 2 (2). One corner of the carbon block 2 (2) is a circular chamfer (7), two corners adjacent to the circular chamfer (7) are right-angled sides, and the side diagonal to the circular chamfer (7) is a straight chamfer (5). The carbon block 1 (1) and the carbon block 2 (2) have the same structure and are symmetrical to each other. When the anode carbon blocks are combined, one side of the straight chamfer fits together. When the anode carbon blocks are symmetrically placed in the electrolytic cell, the straight chamfered parts form holes for shelling and feeding.

2. A novel low offline prebaked anode according to claim 1, characterized in that: The tops of the carbon blocks 1 (1) and 2 (2) are both provided with carbon bowls (3), and the interior of the carbon bowls (3) is provided with mold grooves (4) for casting and fixing with the anode steel claws (9), so that the carbon blocks 1 (1) and 2 (2) are completely combined.

3. A novel low offline prebaked anode according to claim 2, characterized in that: A spiral groove (8) is provided in the carbon bowl (3).

4. A novel low offline prebaked anode according to claim 3, characterized in that: The spiral groove (8) spirals in the same direction, and after the molten iron is cast into the carbon bowl (3), it solidifies in the spiral groove (8) to form a spiral body.

5. The novel low offline prebaked anode according to claim 3, characterized in that: The number of the spiral grooves (8) is an even number, and two adjacent spiral grooves (8) are arranged in an inner eight or outer eight configuration.

6. The novel low offline prebaked anode according to claim 3, characterized in that: The top of the carbon bowl (3) is provided with a casting port (6) located outside the top opening of the mold groove (4), and the top of the spiral groove (8) is connected to the casting port (6).

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