CN118345454A - Cathode carbon block steel bar group structure of threaded rod aluminum electrolysis cell - Google Patents
Cathode carbon block steel bar group structure of threaded rod aluminum electrolysis cell Download PDFInfo
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- CN118345454A CN118345454A CN202410465725.1A CN202410465725A CN118345454A CN 118345454 A CN118345454 A CN 118345454A CN 202410465725 A CN202410465725 A CN 202410465725A CN 118345454 A CN118345454 A CN 118345454A
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- cathode
- steel bar
- carbon block
- cathode carbon
- threaded rod
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- OKTJSMMVPCPJKN-UHFFFAOYSA-N Carbon Chemical compound [C] OKTJSMMVPCPJKN-UHFFFAOYSA-N 0.000 title claims abstract description 127
- 229910000831 Steel Inorganic materials 0.000 title claims abstract description 122
- 239000010959 steel Substances 0.000 title claims abstract description 122
- 229910052799 carbon Inorganic materials 0.000 title claims abstract description 106
- 229910052782 aluminium Inorganic materials 0.000 title claims abstract description 20
- XAGFODPZIPBFFR-UHFFFAOYSA-N aluminium Chemical compound [Al] XAGFODPZIPBFFR-UHFFFAOYSA-N 0.000 title claims abstract description 20
- 238000005868 electrolysis reaction Methods 0.000 title claims abstract description 18
- 229910052751 metal Inorganic materials 0.000 claims abstract description 11
- 239000002184 metal Substances 0.000 claims abstract description 11
- 229910002804 graphite Inorganic materials 0.000 claims description 22
- 239000010439 graphite Substances 0.000 claims description 22
- 239000007770 graphite material Substances 0.000 claims description 4
- RYGMFSIKBFXOCR-UHFFFAOYSA-N Copper Chemical compound [Cu] RYGMFSIKBFXOCR-UHFFFAOYSA-N 0.000 claims description 2
- 229910000746 Structural steel Inorganic materials 0.000 claims description 2
- 229910052802 copper Inorganic materials 0.000 claims description 2
- 239000010949 copper Substances 0.000 claims description 2
- 239000007769 metal material Substances 0.000 claims description 2
- 238000000034 method Methods 0.000 description 11
- XEEYBQQBJWHFJM-UHFFFAOYSA-N Iron Chemical compound [Fe] XEEYBQQBJWHFJM-UHFFFAOYSA-N 0.000 description 10
- 229910052742 iron Inorganic materials 0.000 description 5
- 239000004020 conductor Substances 0.000 description 3
- 238000010276 construction Methods 0.000 description 3
- 238000009434 installation Methods 0.000 description 3
- QMQXDJATSGGYDR-UHFFFAOYSA-N methylidyneiron Chemical compound [C].[Fe] QMQXDJATSGGYDR-UHFFFAOYSA-N 0.000 description 3
- OAICVXFJPJFONN-UHFFFAOYSA-N Phosphorus Chemical compound [P] OAICVXFJPJFONN-UHFFFAOYSA-N 0.000 description 2
- 229910000805 Pig iron Inorganic materials 0.000 description 2
- 238000005516 engineering process Methods 0.000 description 2
- 229910052698 phosphorus Inorganic materials 0.000 description 2
- 239000011574 phosphorus Substances 0.000 description 2
- 239000011230 binding agent Substances 0.000 description 1
- 238000004939 coking Methods 0.000 description 1
- 238000009833 condensation Methods 0.000 description 1
- 230000005494 condensation Effects 0.000 description 1
- 230000007797 corrosion Effects 0.000 description 1
- 238000005260 corrosion Methods 0.000 description 1
- 230000007547 defect Effects 0.000 description 1
- 239000010710 diesel engine oil Substances 0.000 description 1
- 239000002283 diesel fuel Substances 0.000 description 1
- 230000000694 effects Effects 0.000 description 1
- 239000008151 electrolyte solution Substances 0.000 description 1
- 238000001125 extrusion Methods 0.000 description 1
- 238000010438 heat treatment Methods 0.000 description 1
- 150000002500 ions Chemical class 0.000 description 1
- 239000003350 kerosene Substances 0.000 description 1
- 239000007788 liquid Substances 0.000 description 1
- 239000000314 lubricant Substances 0.000 description 1
- 239000000463 material Substances 0.000 description 1
- 238000002156 mixing Methods 0.000 description 1
- 230000000149 penetrating effect Effects 0.000 description 1
- DPTATFGPDCLUTF-UHFFFAOYSA-N phosphanylidyneiron Chemical compound [Fe]#P DPTATFGPDCLUTF-UHFFFAOYSA-N 0.000 description 1
- 238000002360 preparation method Methods 0.000 description 1
- 230000035939 shock Effects 0.000 description 1
- 239000000126 substance Substances 0.000 description 1
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 description 1
Abstract
A screw rod type aluminum electrolysis cell cathode carbon block steel bar group structure is mainly applied and constructed to an aluminum electrolysis cell cathode molten pool structure. The cathode steel bar of the cathode carbon block steel bar group is a cathode steel bar threaded rod (1) part with external threads formed on the outer structure, namely, the external threads (2) are formed on the outer surface of a cathode steel bar of a metal conductive part, the cathode steel bar is formed into a cathode steel bar threaded rod (1), and conductive thread connecting holes (4) of the cathode carbon block (3) which are correspondingly arranged with the cathode steel bar threaded rod (1) are formed at the bottom of the cathode carbon block (3) along the length direction; when the cathode carbon block steel bar is assembled, the cathode steel bar threaded rod (1) is rotationally screwed into the threaded connection hole (4) of the cathode carbon block (1), so that the cathode steel bar threaded rod (1) and the cathode carbon block (3) form a cathode conductive part which is structurally connected by threads.
Description
Technical field: a screw rod type aluminum electrolysis cell cathode carbon block steel bar group structure is mainly applied and constructed to an aluminum electrolysis cell cathode molten pool structure.
The background technology is as follows: the cathode carbon block steel bar group of the electrolytic tank is a main component for constructing an electrolytic bath by building the upper part of an insulating layer in the shell of the aluminum electrolytic tank, and has the main functions of bearing aluminum liquid, electrolyte solution and conducting current. The prior cathode carbon block steel bar set of the aluminum electrolysis cell mainly comprises two structural methods. One method is that after the cathode steel bar is placed in the concave steel bar groove of the cathode carbon block, a gap of about 15mm is reserved between the cathode steel bar and the cathode carbon block, and then carbon tamping paste is used as a conductive connecting medium between iron-carbon interfaces, and the cathode carbon block and the cathode steel bar are bound together to form a cathode carbon block steel bar group; the disadvantage of this method is that it results in a high connection resistance, i.e. voltage drop, between the two. The second method is that after the cathode steel bar is put into the concave steel bar groove of the cathode carbon block, the heated and melted phosphorus pig iron water is poured into gaps of about 15mmde reserved on two sides of the cathode steel bar, and after the molten iron is solidified, phosphorus iron is used as a conductive connecting medium between the bonding interface of the cathode steel bar and the cathode carbon block; the disadvantages of this method are: firstly, because of the thermal shock of pouring molten iron, the product yield of the broken cathode carbon block is relatively low, and secondly, gaps between cold shrinkage are generated between iron and carbon in the molten iron condensation shrinkage process, so that the connection resistance value between the iron and carbon combination interfaces, namely voltage drop, is high.
The invention comprises the following steps: in order to overcome the defects of the cathode carbon block steel bar group of the aluminum electrolysis cell in the prior art, the resistance value (voltage drop) between the connection interface of the cathode carbon block and the cathode steel bar is reduced, the stability of conductive connection between the cathode carbon block and the cathode steel bar is ensured, the connection construction cost between the cathode carbon block and the cathode steel bar is reduced, and the current efficiency of the aluminum electrolysis cell is improved. The invention provides a structure and a preparation method of a screw type aluminum electrolysis cell cathode carbon block steel bar group, which are based on the technical theory that the iron-carbon interface connection resistance value is related to the material factors such as conductive materials, conductive area, bonding pressure intensity, using working condition temperature and the like, and refer to the mechanical assembly bolt connection principle, and are technically characterized in that:
A screw cathode carbon block steel bar set is formed by combining two parts of a cathode steel bar threaded rod and a cathode carbon block, and is characterized in that: the outer surface of the cathode steel bar of the metal conductive part is provided with a connecting thread which is constructed as a cathode steel bar threaded rod, and the bottom of the cathode carbon block is provided with a cathode carbon block conductive thread connecting hole which is configured corresponding to the cathode steel bar threaded rod thread along the length direction; when the cathode carbon block steel bar is assembled, the threaded rod of the cathode steel bar is screwed into the bolt connecting hole of the cathode carbon block in a rotating way, so that the threaded rod of the cathode steel bar and the cathode carbon block form a cathode conductive part which is connected by threads in a structure.
According to the technical scheme: the cathode steel bar threaded rod is a metal conductive part and is generally constructed by adopting low-carbon structural steel with excellent conductivity or copper metal materials with lower resistance and high conductivity.
According to the technical scheme: the cathode carbon block is made of graphite material or carbon material, and is provided with conductive thread connecting holes which are mutually corresponding to the threads of the threaded rod of the cathode steel bar.
According to the technical scheme: in order to improve the connection strength between the threaded connection interfaces of the cathode steel rod and the cathode carbon block and reduce microscopic connection gaps, and improve the conductive connection performance, a graphite conductive bolt is arranged at the connection joint of the threaded rod of the cathode steel rod and the cathode carbon block. The graphite conductive bolt can be heated and melted rapidly during the starting of the heating rate electrolytic tank, and graphite conductive substances of the graphite conductive bolt can be filled into gaps of a threaded connection interface between a cathode steel rod threaded rod and a cathode carbon block rapidly, and a compact and solidified conductive connector is formed.
According to the technical scheme: a plurality of graphite electrode joint bolt mounting blind holes are formed in the cathode steel bar; when the cathode carbon block steel bar set is assembled, the graphite electrode joint bolt is filled in the graphite electrode joint bolt mounting blind hole, and then the cathode steel bar is rotationally screwed into the nut connecting hole of the cathode carbon block.
According to the technical scheme: when the cathode conductive metal threaded rod and the cathode carbon block are assembled, in order to reduce the connection resistance value between the cathode steel rod and the cathode carbon block and reduce voltage drop, reduce the joint interface gap error between the cathode carbon block concave steel rod groove and the cathode steel rod, improve the conductivity of known connection interfaces, and can be coated with graphite conductive paste at the conductive combination interface of the cathode steel rod groove and the cathode steel rod; the conductive paste is prepared by mixing graphite powder or conductive metal and a binder.
The cathode carbon block steel bar set prepared by adopting the technical scheme of the invention has the following advantages: firstly, in a normal temperature state, a cathode steel bar with threads is directly assembled into a threaded hole of a cathode carbon block by adopting a rotary extrusion method, so that the cathode carbon block and the cathode steel bar, namely a cathode conductive metal threaded rod, are electrically connected, the existing process of tamping paste and pouring phosphorus pig iron is replaced, and the construction and assembly cost of the cathode carbon block steel bar group is reduced; the assembly process of the cathode steel bar and the cathode carbon block is simplified; secondly, through the threaded connection between the cathode steel bar and the cathode carbon block, the area of conductive connection between the cathode steel bar and the cathode carbon block can be increased, the resistance value of connection between the cathode carbon block and the cathode steel bar can be reduced, and the conductivity of the cathode steel bar is improved. Thirdly, the connection strength between the cathode steel bar and the cathode carbon block can be increased by adopting threaded connection, and the stability of conductive connection between the cathode steel bar and the cathode carbon block is improved. The method is characterized in that at the iron-carbon combination interface of the cathode steel bar and the cathode carbon block, the graphite electrode joint bolt technology at the graphite electrode threaded connection of the original metallurgical submerged arc furnace is innovatively introduced into the assembly process of the cathode carbon block steel bar group of the aluminum electrolysis cell, so that microscopic gaps at the iron-carbon bonding interface of the cathode steel bar and the cathode carbon block are reduced, the conductive efficiency between the cathode steel bar and the cathode carbon block is improved, nano corrosion of nano ions on the surface of the cathode steel bar in the aluminum electrolysis process can be prevented, and the stability and the reliability of the overall conductive performance of the cathode carbon block steel bar group are improved.
Description of the drawings: the technical characteristics of the structure of the spiral aluminum electrolysis cell cathode carbon block steel bar set can be further known by reading the attached drawings and the specific embodiments of the specification.
Fig. 1 is a schematic view of the structure of the threaded rod of the cathode steel rod according to embodiment 1 of the present invention.
Fig. 2 is a cross-sectional view of fig. 1.
FIG. 3 is a schematic view of the cathode carbon block structure 1/2 of example 1.
Fig. 4 is a cross-sectional view of fig. 3.
FIG. 5 is an assembly drawing of a cathode carbon block steel bar set of example 1
Fig. 6 is a cross-sectional view of fig. 5.
FIG. 7 is a schematic view showing the 1/2 structure of a cathode carbon block according to embodiment 2 of the present invention.
Fig. 8 is a side cross-sectional view of fig. 7.
FIG. 9 is an assembly drawing of a cathode carbon block steel bar set of example 2
FIG. 10 is a cross-sectional view of FIG. 9
The figure shows: the device comprises a cathode steel bar threaded rod (1), a cathode steel bar external thread (2), a cathode carbon block (3), a cathode carbon block threaded hole (4), a joint bolt installation blind hole (5) and a graphite electrode joint bolt (6).
The specific embodiment is as follows: the technical characteristics of the cathode carbon block steel rod group are that the cathode steel rod (1) is a conductive metal screw rod structural member, the cathode carbon block is provided with a threaded connection hole, the cathode steel rod is provided with external threads, and the cathode steel rod and the carbon block of the cathode carbon block steel rod group are in threaded penetrating type fastening connection and conductive connection. The specific structure and construction mode are detailed in the following embodiments;
Example 1: as shown in fig. 1 and 2, the cathode steel bar of the cathode carbon block steel bar set in this embodiment is a threaded rod type component made of conductive metal, namely, the appearance is a round metal rod type component, and external threads (2) for connecting with threaded connection holes on the cathode carbon block are formed on the external surface of the cathode steel bar. As shown in fig. 3 and 4, two screw connection holes (4) which are mutually configured with the screw threads on the cathode steel bar are arranged on the cathode carbon block. The threaded connection holes (4) are arranged along the length direction of the cathode carbon block.
As shown in fig. 5 and 6, when the cathode carbon block steel bar assembly is carried out, the cathode steel bar threaded rod (1) is rotated and screwed into the pre-prefabricated cathode carbon (3) block threaded connection hole (4) to form a component similar to the integral connection of the cathode carbon block (3) and the cathode steel bar threaded rod (1) which are connected by a mechanical bolt and a nut. In order to reduce the resistance of the cathode steel bar threaded rod (1) rotationally arranged in the threaded connection hole (4) of the cathode carbon block (3), a layer of carbide lubricant such as kerosene, diesel oil or engine oil can be coated on the outer surface of the cathode steel bar threaded rod (2) before assembly when the cathode steel bar threaded rod (1) and the cathode carbon block (3) are assembled.
As shown in fig. 1,2 and 5, in order to reduce the resistance value of the conductive connection between the cathode steel bar threaded rod (1) and the cathode carbon block (3) and improve the conductive performance of the connection interface between the cathode steel bar threaded rod and the cathode carbon block, a plurality of graphite electrode joint bolts (6) are arranged on the cathode steel bar threaded rod (1) to be provided with a plurality of installation blind holes (5), then the graphite electrode joint bolts (6) are filled in the graphite electrode joint bolt installation blind holes (5), and then the cathode steel bar threaded rod (1) and the cathode carbon block (3) are assembled together; the purpose of adding and configuring the graphite electrode joint bolt (6) on the cathode steel bar threaded rod (1) is to utilize the characteristics that the graphite electrode joint bolt (6) has self-flow expansion and high coking rate after being heated at high temperature, so that the graphite conductive material can be rapidly extruded into microscopic gaps filled in the joint of the threaded connection interface of the cathode carbon block (3) and the cathode steel bar (1), thereby improving the conductive area and the compact bonding strength between the interface of the cathode steel bar threaded rod (1) and the cathode carbon block (3), and realizing the effect of improving the conductive connection strength and the stability of the graphite conductive material.
Example 2, as shown in fig. 7, 8 and 9 and 10, the cathode carbon block steel bar set of example 2 has substantially the same structure as that of example 1, and is characterized in that: the cathode carbon block steel bar set in the embodiment 1 is constructed by configuring two cathode steel bar threaded rods (1) with external threads with one cathode carbon block (3), while in the embodiment 2, three cathode steel bar threaded rods (1) with external threads are configured with one cathode carbon block (3).
Claims (5)
1. A screw rod type aluminum electrolysis cell cathode carbon block steel bar group is characterized in that: the cathode steel bar of the cathode carbon block steel bar group is a cathode steel bar threaded rod (1) part with external threads formed on the outer structure, namely, the external threads (2) are formed on the outer surface of a cathode steel bar of a metal conductive part, the cathode steel bar is formed into a cathode steel bar threaded rod (1), and conductive thread connecting holes (4) of the cathode carbon block (3) which are correspondingly arranged with the cathode steel bar threaded rod (1) are formed at the bottom of the cathode carbon block (3) along the length direction; when the cathode carbon block steel bar is assembled, the cathode steel bar threaded rod (1) is rotationally screwed into the threaded connection hole (4) of the cathode carbon block (1), so that the cathode steel bar threaded rod (1) and the cathode carbon block (3) form a cathode conductive part which is structurally connected by threads.
2. The screw rod type aluminum electrolysis cell cathode carbon block steel bar set according to claim 1, which is characterized in that: the cathode steel bar threaded rod (1) is a metal conductive part and is generally constructed by adopting low-carbon structural steel with excellent conductivity or copper metal materials with lower resistance value and higher conductivity.
3. The screw rod type aluminum electrolysis cell cathode carbon block steel bar set according to claim 1, which is characterized in that: the cathode carbon block (3) is made of graphite material or carbon material; conductive thread connecting holes (4) which are arranged corresponding to the cathode steel bar threaded rods (1) are arranged on the cathode carbon blocks (3).
4. The screw rod type aluminum electrolysis cell cathode carbon block steel bar set according to claim 1, which is characterized in that: in order to improve the connection strength between the threaded connection interface of the cathode steel bar threaded rod (1) and the cathode carbon block (3) and reduce microscopic connection gaps, and improve the conductive connection performance, a graphite conductive bolt is arranged at the connection joint of the cathode steel bar threaded rod and the cathode carbon block.
5. The screw rod type aluminum electrolysis cell cathode carbon block steel bar set according to claim 1, which is characterized in that: a plurality of graphite electrode joint bolt mounting blind holes are formed in the cathode steel bar; when the cathode carbon block steel bar set is assembled, the graphite electrode joint bolt is filled in the graphite electrode joint bolt mounting blind hole, and then the cathode steel bar is rotationally screwed into the nut connecting hole of the cathode carbon block.
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN118345454A true CN118345454A (en) | 2024-07-16 |
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