Sampled and repaired anode carbon block and forming method thereof

Abstract

The invention relates to the technical field of anode carbon blocks, in particular to a sampled and repaired anode carbon block and a forming method thereof. A stepped hole formed by reaming the sampling hole is formed in the top of the carbon block body and comprises a large hole in the upper part and a small hole in the lower part; the small hole is filled with cold ramming paste, the large hole is connected with a stopper, the stopper is in interference fit with the large hole, and the bottom end of the stopper is connected with the bottom end of the large hole; the sampling holes are expanded to form stepped holes, and the stepped holes are filled with fillers respectively; the stepped hole is divided into an upper hole section and a lower hole section, and the upper hole section is located in the step. The step can play a role in blocking, so that the upper filler is not easy to fall off, and even if the lower filler falls off, the upper filler can still play a role in blocking the electrolyte from emitting upwards; and the corners are formed at the steps, so that obstruction can be increased, and electrolyte is prevented from emerging upwards along the stepped holes.

Description

Technical Field

[0001] This invention relates to the field of anode carbon block technology, specifically to a sampled and repaired anode carbon block and its formation method. Background Technology

[0002] Anode carbon blocks are a crucial consumable material in electrolytic production, requiring high quality, consumed in large quantities, and are expensive. To ensure quality, a certain proportion of carbon blocks must be sampled and tested upon arrival. After sampling, the sampling holes are sealed with cold-tamped paste before being put into production. However, due to the poor compaction strength and relatively low hardness of the cold-tamped paste, bottom-penetration claw failure still occurs during use. This means that the sealing material comes out of the sampling hole, and electrolyte rises from the sampling hole and comes into contact with the anode steel claw, dissolving and consuming it. Bottom-penetration claw failure can cause the steel claw to be melted into the electrolyte, eventually entering the molten aluminum, contaminating the molten aluminum, and causing anode assembly detachment, short circuits, disrupting the stable operation of the electrolytic cell, and leading to serious consequences such as electrolyte splashing and cell leakage. Summary of the Invention

[0003] The main objective of this invention is to provide a sampled and repaired anode carbon block and its formation method, in order to solve the problem in the prior art where the sealing material of the sampled and repaired anode carbon block comes out of the sampling hole during use, resulting in a bottom-penetrating claw failure.

[0004] To achieve the above objectives, the present invention provides a sampled and repaired anode carbon block, comprising a carbon block body; the top of the carbon block body is provided with a stepped hole formed by enlarging the sampling hole, the stepped hole including a large hole at the top and a small hole at the bottom; the small hole is filled with cold tamping paste, and a stopper rod is connected to the large hole, the stopper rod is interference-fitted with the large hole, and the bottom end of the stopper rod is connected to the bottom end of the large hole.

[0005] Furthermore, the stopper rod is made of the same material as the carbon block itself.

[0006] Furthermore, the length of the stopper rod is slightly greater than the depth of the large hole.

[0007] This invention also provides a method for forming an anode carbon block after sampling and repair, comprising the following steps: S1. After sampling, a sampling hole is left at the top of the carbon block body. The sampling hole is enlarged to form a stepped hole, which includes a large hole at the top and a small hole at the bottom. S2. Fill the small hole with cold paste and tamp it down. S3. Knock a stopper rod with an outer diameter slightly larger than the inner diameter of the large hole into the large hole. The stopper rod and the large hole are interference fit, and the bottom end of the stopper rod is connected to the bottom end of the large hole. Furthermore, in step S3, the material of the stopper rod is the same as that of the carbon block body, and the stopper rod is taken from waste anode carbon blocks or new anode carbon blocks.

[0008] Furthermore, in step S3, the length of the stopper is slightly greater than the depth of the large hole, so that when the stopper is hammered into the large hole, it can be hammered more firmly and avoids hitting the carbon block itself.

[0009] The beneficial effects of this invention are: The present invention enlarges the sampling hole to form a stepped hole, and fills it with filler material. The stepped hole is divided into upper and lower sections, with the upper section located on a step. The step can act as a barrier, making it less likely for the upper filler material to fall off. Even if the lower filler material falls off, the upper filler material can still prevent the electrolyte from escaping upward. Furthermore, the step forms a corner, which can also increase the obstruction and prevent the electrolyte from escaping upward along the stepped hole.

[0010] This invention achieves a tighter connection between the large hole of the stepped hole and the stopper rod by using an interference fit, making it less likely for the stopper rod to fall off. Furthermore, by selecting a stopper rod material that is the same as the material of the carbon block body, this invention further ensures a tighter connection between the large hole and the stopper rod.

[0011] The method for forming a sampled and repaired anode carbon block of the present invention involves enlarging the hole, filling with cold tamping paste, and hammering in a stopper rod to form a sampled and repaired anode carbon block. The operation is simple, the filler is tightly connected to the stepped hole, which reduces the probability of the sealing material coming out of the sampling hole when the sampled and repaired anode carbon block is used, and reduces the probability of bottom-through claw failure, resulting in good effect. Attached Figure Description

[0012] The accompanying drawings, which form part of this application, are used to provide a further understanding of the invention. The illustrative embodiments of the invention and their descriptions are used to explain the invention and do not constitute an improper limitation of the invention.

[0013] Fig. 1 This is a schematic diagram showing the location of the sampling hole on the carbon block in the embodiment; Fig. 2 This is a schematic diagram of the sampling hole structure in the embodiment; Fig. 3 This is a schematic diagram of the stepped hole structure in the embodiment; Fig. 4 This is a schematic diagram of the stopper rod and the cold-mixed paste in the embodiment; In the diagram: 1. Carbon block body; 101. Stepped hole; 101a. Large hole; 101b. Small hole; 2. Stopper rod; 3. Cold pounding paste; 4. Sampling hole. Detailed Implementation

[0014] It should be noted that, unless otherwise specified, the embodiments and features described in this application can be combined with each other. The present invention will now be described in detail with reference to the accompanying drawings and embodiments.

[0015] Example 1 likeFigs. 1 to 4 As shown, according to an embodiment of the present invention, a sampled and repaired anode carbon block is provided, including a carbon block body 1; the top of the carbon block body 1 is provided with a stepped hole 101 formed by enlarging a sampling hole 4, the sampling hole 4 being a circular hole with a diameter of 54 mm and a depth of 160 mm; the stepped hole 101 includes a large hole 101a at the top and a small hole 101b at the bottom; the large hole 101a and the small hole 101b are coaxially arranged, the large hole 101a being a circular hole with a diameter of 54 mm and a depth of 50 mm, and the small hole 101b being a circular hole with a diameter of 52 mm and a depth of 110 mm; the small hole 101b is filled with cold ramming paste 3, and a stopper rod 2 is connected to the large hole 101a, the stopper rod 2 being interference-fitted with the large hole 101a, and the bottom end of the stopper rod 2 being connected to the bottom end of the large hole 101a.

[0016] The material of the stopper rod 2 is the same as that of the carbon block body 1; the stopper rod 2 is taken from waste anode carbon blocks or new anode carbon blocks.

[0017] The stopper rod 2 is cylindrical, and its length is slightly greater than the depth of the large hole 101a; the diameter of the stopper rod 2 is 55 mm, and its length is 60 mm.

[0018] In this embodiment, the sampling hole is enlarged to form a stepped hole, and filler is filled in. The stepped hole is divided into upper and lower sections, with the upper section located on a step. The step can act as a barrier, making it less likely for the upper filler to fall off. Even if the lower filler falls off, the upper filler can still prevent the electrolyte from escaping upward. Furthermore, the step forms a corner, which can also increase the obstruction and prevent the electrolyte from escaping upward along the stepped hole.

[0019] In this embodiment, by using an interference fit between the large hole of the stepped hole and the stopper rod, the connection between the large hole and the stopper rod becomes tighter and less likely to cause the stopper rod to fall off. By selecting a stopper rod material that is the same as the material of the carbon block body, the present invention can further ensure a tight connection between the large hole and the stopper rod.

[0020] Example 2 A method for forming an anode carbon block after sampling and repair in Example 1 includes the following steps: S1. After sampling, a sampling hole 4 is left at the top of the carbon block body 1. The sampling hole 4 is a circular hole with a diameter of 54 mm and a depth of 160 mm. The sampling hole 4 is enlarged to form a stepped hole 101. The stepped hole 101 includes a large hole 101a at the top and a small hole 101b at the bottom. The large hole 101a and the small hole 101b are coaxially arranged. The large hole 101a is a circular hole with a diameter of 54 mm and a depth of 50 mm. The small hole 101b is a circular hole with a diameter of 52 mm and a depth of 110 mm. S2. Fill the small hole 101b with cold tamping paste 3 and tamp it down. S3. Prepare stopper rod 2: The material of stopper rod 2 is the same as that of carbon block body 1. Stopper rod 2 is taken from waste anode carbon block or new anode carbon block; stopper rod 2 is cylindrical, with a diameter of 55mm and a length of 60mm. A stopper 2 with an outer diameter slightly larger than the inner diameter of the large hole 101a is hammered into the large hole 101a. The stopper 2 and the large hole 101a are interference-fitted, and the bottom end of the stopper 2 is connected to the bottom end of the large hole 101a. The length of the stopper 2 is slightly larger than the depth of the large hole 101a. When the stopper 2 is hammered into the large hole 101a, it can be hammered more tightly and avoids hitting the carbon block body 1.

[0021] The method for forming the sampled and repaired anode carbon block in this embodiment involves enlarging the hole, filling with cold tamping paste, and hammering in a stopper rod. This method is simple to operate, and the filler is tightly connected to the stepped hole, which reduces the probability that the sealing material will fall out of the sampling hole during use and reduces the probability of bottom-through claw failure. The effect is good.

[0022] The performance of the sampled and repaired anode carbon blocks was tested, and the test results are shown in Table 1. After the sampled and repaired anode carbon blocks were put into production, their service life was about 37 days. The stopper rod played a sealing role, the electrolyte did not penetrate the sampling hole, and there was no bottom penetration phenomenon. Meanwhile, the average service life of new anode carbon blocks of the same specification in the same tank during the same period without sampling was 37 days. The service life of the sampled and repaired anode carbon blocks in this application is basically the same as that of new anode carbon blocks without sampling.

[0023] Table 1 Performance Test Table of Anode Carbon Blocks After Sampling and Repair The above description is merely a preferred embodiment of the present invention and is not intended to limit the invention. Various modifications and variations can be made to the present invention by those skilled in the art. Any modifications, equivalent substitutions, improvements, etc., made within the spirit and principles of the present invention should be included within the scope of protection of the present invention.

Claims

1. A sampled and repaired anode carbon block, comprising a carbon block body (1); characterized in that, The top of the carbon block body (1) is provided with a stepped hole (101) formed by enlarging the sampling hole (4). The stepped hole (101) includes a large hole (101a) at the top and a small hole (101b) at the bottom. The small hole (101b) is filled with cold pounding paste (3). The large hole (101a) is connected to a stopper rod (2). The stopper rod (2) is press-fitted with the large hole (101a). The bottom end of the stopper rod (2) is connected to the bottom end of the large hole (101a).

2. The anode carbon block after sampling and repair as described in claim 1, characterized in that, The stopper rod (2) is made of the same material as the carbon block body (1).

3. The anode carbon block after sampling and repair as described in claim 1, characterized in that, The length of the stopper (2) is slightly greater than the depth of the large hole (101a).

4. A method for forming an anode carbon block after sampling and repair as described in claim 1, characterized in that, Includes the following steps: S1. After sampling, a sampling hole (4) is left at the top of the carbon block body (1). The sampling hole (4) is enlarged to form a stepped hole (101). The stepped hole (101) includes a large hole (101a) at the top and a small hole (101b) at the bottom. S2. Fill the small hole (101b) with cold pounded paste (3) and pound it firmly; S3. Knock the stopper (2), whose outer diameter is slightly larger than the inner diameter of the large hole (101a), into the large hole (101a). The stopper (2) and the large hole (101a) are interference-fitted, and the bottom end of the stopper (2) is connected to the bottom end of the large hole (101a).

5. The forming method as described in claim 4, characterized in that, In step S3, the material of the stopper rod (2) is the same as that of the carbon block body (1), and the stopper rod (2) is taken from waste anode carbon blocks or new anode carbon blocks.

6. The forming method as described in claim 4, characterized in that, In step S3, the length of the stopper (2) is slightly greater than the depth of the large hole (101a). When the stopper (2) is hammered into the large hole (101a), it can be hammered more firmly and avoids hitting the carbon block body (1).

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