Carbon electrode butt joint anti-loose structure, carbon electrode for smelting of submerged arc furnace and submerged arc furnace

Abstract

The utility model relates to a carbon electrode butt joint anti-loose structure, a carbon electrode for smelting of a submerged arc furnace and the submerged arc furnace, the carbon electrode butt joint anti-loose structure comprises a first electrode end and a second electrode end, and a connector is fixedly or integrally arranged on the first electrode end; the second electrode end is located on the upper portion of the first electrode end, a connecting groove used for fixedly installing a connector is formed in the second electrode end, a preset groove is formed in the inner wall of the upper portion of the connecting groove, and a solid conductive binder is stored in the preset groove. The solid conductive adhesive melts and flows to fill a gap between the connector and the connecting groove; and when the temperature of the solid conductive adhesive is higher than a second set value, the fixed conductive adhesive is coked in the gap between the connector and the connecting groove. The gap between the first electrode end and the second electrode end which are connected and matched is filled, so that the conductive contact area is increased, the internal stress is small, the breakage rate of the electrode is greatly reduced, the production halt frequency is reduced, and the production efficiency is improved.

Description

Technical Field

[0001] The utility model belongs to the technical field of carbon electrode connection of submerged arc furnaces, and specifically relates to a carbon electrode butt joint anti-loosening structure, a carbon electrode for submerged arc furnace smelting, and a submerged arc furnace. Background Art

[0002] The electrodes in the electric arc furnace are not long enough, so male and female buckles need to be processed at both ends for connection. However, due to the deviation in the accuracy of the male and female buckles during the actual processing, the two connected electrodes have poor contact during smelting and use, resulting in large contact surface resistance and high temperature, resulting in large internal stress in the connected electrodes, and even fracture, causing the furnace to stop, affecting production. Utility Model Content

[0003] The utility model aims to overcome the shortcomings of the prior art and provide a carbon electrode butt-jointing anti-loosening structure, which solves the technical problems of poor contact between two connected electrodes in a submerged arc furnace.

[0004] In order to solve the above problems, the technical solution of the utility model is: a carbon electrode butt joint anti-loosening structure, comprising:

[0005] A first electrode terminal, on which a connector is fixed or integrally provided;

[0006] The second electrode end is located at the upper part of the first electrode end. A connecting groove for fixing and installing a connecting head is provided on the second electrode end. A pre-groove is provided on the upper inner wall of the connecting groove. A solid conductive adhesive is stored in the pre-groove. When the temperature of the solid conductive adhesive reaches its melting temperature range, the solid conductive adhesive melts and flows to fill the gap between the connecting head and the connecting groove; when the temperature of the solid conductive adhesive reaches its coking temperature range, the fixed conductive adhesive is coked in the gap between the connecting head and the connecting groove.

[0007] Optionally, there is an installation space between the opening of the connecting groove and the end of the connecting head, and a plate-shaped filler is placed in the installation space, and the plate-shaped filler is sealed at the opening of the connecting groove.

[0008] Optionally, the inner side wall of the connecting groove has an internal thread, the outer side wall of the connecting head has an external thread, and the connecting head is fixedly installed in the connecting groove by threaded connection.

[0009] Optionally, the connecting groove is a tapered thread connecting groove, and the connecting head is a tapered thread connecting head.

[0010] Optionally, the solid conductive adhesive is medium-temperature coal tar pitch or low-temperature coal tar pitch.

[0011] Optionally, the plate-shaped filler is a mixture of carbon or graphite and medium-temperature coal tar pitch or low-temperature coal tar pitch.

[0012] Optionally, an annular end surface on the first electrode terminal located outside the bottom of the connector contacts an annular end surface on the second electrode terminal located outside the opening of the connecting groove.

[0013] Another object of the utility model is to provide a carbon electrode for smelting in an electric arc furnace, comprising a plurality of connected electrode units, wherein one of two adjacent electrode units has a first electrode end, and the other electrode unit has a second electrode end, and the two adjacent electrode units are connected by the carbon electrode butt-jointing anti-loosening structure.

[0014] Another purpose of the utility model is to provide a submerged arc furnace, on which the submerged arc furnace is equipped with the carbon electrode for smelting in the submerged arc furnace.

[0015] Compared with the prior art, the utility model has the following beneficial effects: the carbon electrode butt joint anti-loosening structure of the utility model uses a solid adhesive to melt into the gap between the connecting head and the connecting groove and fix it by coking, which plays an anti-loosening effect on the connecting part of the first electrode end and the second electrode end, increases the conductive contact area of ​​the first electrode end and the second electrode end, reduces the conductive contact resistance, has small internal stress, greatly reduces the electrode breakage rate, reduces the number of production stoppages, and thus improves production efficiency. BRIEF DESCRIPTION OF THE DRAWINGS

[0016] Figure 1 Schematic diagram of the structure of the carbon electrode butt joint anti-loosening structure in the embodiment.

[0017] Figure numerals: 1, first electrode end; 11, connector; 111, external thread; 2, second electrode end; 21, connection groove; 211, internal thread; 22, pre-set groove; 23, installation space; 231, plate-shaped filler; 24, gap; 3, solid conductive adhesive. DETAILED DESCRIPTION

[0018] The utility model is further described in detail below in conjunction with the accompanying drawings and embodiments.

[0019] Example 1: Figure 1 As shown, the present embodiment provides a carbon electrode butt joint anti-loosening structure, comprising a first electrode end 1 and a second electrode end 2, wherein a connector 11 is fixedly or integrally provided on the first electrode end 1; the second electrode end 2 is located at the upper part of the first electrode end 1, and a connecting groove 21 for fixing and installing the connector 11 is provided on the second electrode end 2, and a pre-groove 22 is provided on the upper inner wall of the connecting groove 21, in which a solid conductive adhesive 3 is stored, and when the temperature of the solid conductive adhesive 3 is higher than a first set value, the solid conductive adhesive 3 melts and flows to fill in a gap 24 between the connector 11 and the connecting groove 21; when the temperature of the solid conductive adhesive 3 is higher than a second set value, the fixed conductive adhesive is coked in the gap 24 between the connector 11 and the connecting groove 21.

[0020] Through the above-mentioned configuration, by setting the solid conductive adhesive 3, after the temperature rises to its melting temperature range, the solid conductive adhesive 3 melts and fills in the gap between the connecting head 11 and the connecting groove 21, and after the temperature continues to rise to its coking temperature range, the solid conductive adhesive 3 cokes and fills in the gap between the connecting head 11 and the connecting groove 21, thereby tightly connecting the first electrode terminal 1 and the second electrode terminal 2 together, reducing the possibility of loosening of the connection part between the first electrode terminal 1 and the second electrode terminal 2, and also increasing the conductive contact area, thereby improving the conductive capacity.

[0021] In the carbon electrode butt joint anti-loosening structure of this embodiment, there is an installation space 23 between the opening of the connection groove 21 and the end of the connection head 11, and a plate-shaped filler 231 is placed in the installation space 23, and the plate-shaped filler 231 is sealed at the opening of the connection groove 21. By providing the plate-shaped filler 231, the gap between the connection head 11 and the connection groove 21 is filled, and the conductive contact area is also increased.

[0022] In the carbon electrode butt joint anti-loosening structure of this embodiment, the inner wall of the connection groove 21 has an internal thread 211, the outer wall of the connection head 11 has an external thread 111, and the connection head 11 is fixedly installed in the connection groove 21 by threaded connection. The structure is simple, the installation is convenient, and the connection is stable.

[0023] In the carbon electrode butt joint anti-loosening structure of the present embodiment, the connection groove 21 is a tapered thread connection groove 21 , and the connection head 11 is a tapered thread connection head 11 .

[0024] In the carbon electrode butt joint anti-loosening structure of this embodiment, the solid conductive adhesive 3 can be medium-temperature coal tar pitch or low-temperature coal tar pitch.

[0025] In the carbon electrode butt joint anti-loosening structure of this embodiment, the plate-shaped filler 231 may be carbon or graphite.

[0026] In the carbon electrode butt joint anti-loosening structure of this embodiment, the annular end surface of the first electrode terminal 1 located outside the bottom of the connector 11 contacts the annular end surface of the second electrode terminal 2 located outside the opening of the connection groove 21. The connection stability and contact area of ​​the first electrode terminal 1 and the second electrode terminal 2 are improved, and the conductivity is improved.

[0027] In the carbon electrode butt joint anti-loosening structure of the present embodiment, the connected electrodes enter the conductive copper tile of the ore-fired furnace. After the temperature is greater than 150 degrees, the solid conductive adhesive 3 melts and flows, filling the gap 24 between the connection groove 21 and the connector 11. As the temperature continues to rise, when the temperature is higher than 500 degrees, the solid conductive adhesive 3 begins to coke. When the temperature is higher than 600 degrees, the solid conductive adhesive 3 is completely coked, thereby tightly connecting the first electrode end 1 and the second electrode end 2 together, thereby increasing the conductivity of the two electrodes.

[0028] In the carbon electrode docking anti-loosening structure of the present embodiment, the operation method is as follows: before the electrode connection is used, a round hole is drilled at the bottom of the connection groove 21 as a pre-groove 22, and a cylindrical solid conductive adhesive filler is placed in the pre-groove 22. A plate-shaped filler 231 is placed on the upper plane of the connector 11, preferably a round cake-shaped filler. When the first electrode terminal 1 and the second electrode terminal 2 are docked and loaded into the electric arc furnace for smelting, the solid conductive adhesive 3 and the plate-shaped filler 231 are melted at high temperature, and then the gap 24 existing in the threaded connection between the first electrode terminal 1 and the second electrode terminal 2 is filled, thereby increasing the conductive contact area of ​​the threaded connection position, reducing the conductive contact resistance, reducing the internal stress, greatly reducing the electrode breakage rate, and improving production efficiency.

[0029] Embodiment 2: This embodiment provides a carbon electrode for smelting in a submerged arc furnace, comprising a plurality of connected electrode units, wherein one of two adjacent electrode units has a first electrode terminal 1, and the other electrode unit has a second electrode terminal 2, and the two adjacent electrode units are connected by the carbon electrode butt joint anti-loosening structure in Embodiment 1. The connection stability between the electrodes is improved, thereby improving the life of the electrodes.

[0030] Embodiment 3: This embodiment provides a submerged arc furnace, which is equipped with a carbon electrode for submerged arc furnace smelting in Embodiment 2. The use stability of the carbon electrode is improved, the normal production is ensured, and the probability of shutdown is reduced.

Claims

1. A carbon electrode butt joint anti-loosening structure, characterized in that: include: A first electrode end (1), a connector (11) being fixed or integrally provided on the first electrode end (1); A second electrode end (2), the second electrode end (2) is located at the upper part of the first electrode end (1), a connecting groove (21) for fixing and installing a connecting head (11) is provided on the second electrode end (2), a pre-set groove (22) is provided on the upper inner wall of the connecting groove (21), a solid conductive adhesive (3) is stored in the pre-set groove (22), when the temperature of the solid conductive adhesive (3) reaches its melting temperature range, the solid conductive adhesive (3) melts and flows to fill the gap (24) between the connecting head (11) and the connecting groove (21); when the temperature of the solid conductive adhesive (3) reaches its coking temperature range, the fixed conductive adhesive is coked in the gap (24) between the connecting head (11) and the connecting groove (21).

2. A carbon electrode butt joint anti-loosening structure according to claim 1, characterized in that: An installation space (23) is provided between the opening of the connection groove (21) and the end of the connection head (11), and a plate-shaped filler (231) is placed in the installation space (23), and the plate-shaped filler (231) is sealed at the opening of the connection groove (21).

3. A carbon electrode butt joint anti-loosening structure according to claim 1, characterized in that: The inner wall of the connection groove (21) has an internal thread (211), the outer wall of the connection head (11) has an external thread (111), and the connection head (11) is fixedly installed in the connection groove (21) by means of threaded connection.

4. A carbon electrode butt joint anti-loosening structure according to claim 3, characterized in that: The connection groove (21) is a tapered thread connection groove (21), and the connection head (11) is a tapered thread connection head (11).

5. The carbon electrode butt joint anti-loosening structure according to claim 1, characterized in that: The solid conductive adhesive (3) is medium-temperature coal tar pitch or low-temperature coal tar pitch.

6. The carbon electrode butt joint anti-loosening structure according to claim 1, characterized in that: An annular end surface on the first electrode end (1) located outside the bottom of the connector (11) contacts an annular end surface on the second electrode end (2) located outside the opening of the connecting groove (21).

7. A carbon electrode for smelting in a submerged arc furnace, characterized in that: It comprises a plurality of connected electrode units, wherein one of the two adjacent electrode units has a first electrode terminal (1), and the other electrode unit has a second electrode terminal (2), and the two adjacent electrode units are connected by the carbon electrode butt joint anti-loosening structure described in any one of claims 1 to 6.

8. A submerged arc furnace, characterized in that: The submerged arc furnace is equipped with a carbon electrode for submerged arc furnace smelting as claimed in claim 7.

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