CN113336550A - Production method of porous anode carbon block for electrolytic aluminum - Google Patents
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- CN113336550A CN113336550A CN202110591818.5A CN202110591818A CN113336550A CN 113336550 A CN113336550 A CN 113336550A CN 202110591818 A CN202110591818 A CN 202110591818A CN 113336550 A CN113336550 A CN 113336550A
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- XAGFODPZIPBFFR-UHFFFAOYSA-N aluminium Chemical compound [Al] XAGFODPZIPBFFR-UHFFFAOYSA-N 0.000 title claims abstract description 94
- 229910052782 aluminium Inorganic materials 0.000 title claims abstract description 94
- OKTJSMMVPCPJKN-UHFFFAOYSA-N Carbon Chemical compound [C] OKTJSMMVPCPJKN-UHFFFAOYSA-N 0.000 title claims abstract description 54
- 229910052799 carbon Inorganic materials 0.000 title claims abstract description 54
- 238000004519 manufacturing process Methods 0.000 title claims abstract description 18
- 239000011329 calcined coke Substances 0.000 claims abstract description 52
- 239000000463 material Substances 0.000 claims abstract description 21
- 238000004898 kneading Methods 0.000 claims abstract description 19
- 239000010426 asphalt Substances 0.000 claims abstract description 17
- 238000001816 cooling Methods 0.000 claims abstract description 17
- 238000005553 drilling Methods 0.000 claims abstract description 10
- 238000010438 heat treatment Methods 0.000 claims abstract description 9
- 238000000465 moulding Methods 0.000 claims abstract description 9
- 239000011230 binding agent Substances 0.000 claims abstract description 5
- 238000001354 calcination Methods 0.000 claims abstract description 5
- 239000002006 petroleum coke Substances 0.000 claims abstract description 5
- 239000000571 coke Substances 0.000 claims description 32
- 239000007788 liquid Substances 0.000 claims description 16
- 235000012054 meals Nutrition 0.000 claims description 12
- 238000000034 method Methods 0.000 claims description 12
- 239000002245 particle Substances 0.000 claims description 6
- 238000002844 melting Methods 0.000 claims description 4
- 230000008018 melting Effects 0.000 claims description 4
- 238000005303 weighing Methods 0.000 claims description 4
- 238000005868 electrolysis reaction Methods 0.000 description 4
- VNWKTOKETHGBQD-UHFFFAOYSA-N methane Chemical compound C VNWKTOKETHGBQD-UHFFFAOYSA-N 0.000 description 2
- 238000012986 modification Methods 0.000 description 2
- 230000004048 modification Effects 0.000 description 2
- 238000006467 substitution reaction Methods 0.000 description 2
- 230000009286 beneficial effect Effects 0.000 description 1
- 230000007547 defect Effects 0.000 description 1
- 238000010586 diagram Methods 0.000 description 1
- 230000000694 effects Effects 0.000 description 1
- 238000005265 energy consumption Methods 0.000 description 1
- 238000011031 large-scale manufacturing process Methods 0.000 description 1
- 230000014759 maintenance of location Effects 0.000 description 1
- 239000000203 mixture Substances 0.000 description 1
- 239000002699 waste material Substances 0.000 description 1
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- C04B—LIME, MAGNESIA; SLAG; CEMENTS; COMPOSITIONS THEREOF, e.g. MORTARS, CONCRETE OR LIKE BUILDING MATERIALS; ARTIFICIAL STONE; CERAMICS; REFRACTORIES; TREATMENT OF NATURAL STONE
- C04B35/00—Shaped ceramic products characterised by their composition; Ceramics compositions; Processing powders of inorganic compounds preparatory to the manufacturing of ceramic products
- C04B35/515—Shaped ceramic products characterised by their composition; Ceramics compositions; Processing powders of inorganic compounds preparatory to the manufacturing of ceramic products based on non-oxide ceramics
- C04B35/52—Shaped ceramic products characterised by their composition; Ceramics compositions; Processing powders of inorganic compounds preparatory to the manufacturing of ceramic products based on non-oxide ceramics based on carbon, e.g. graphite
- C04B35/528—Shaped ceramic products characterised by their composition; Ceramics compositions; Processing powders of inorganic compounds preparatory to the manufacturing of ceramic products based on non-oxide ceramics based on carbon, e.g. graphite obtained from carbonaceous particles with or without other non-organic components
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- C—CHEMISTRY; METALLURGY
- C04—CEMENTS; CONCRETE; ARTIFICIAL STONE; CERAMICS; REFRACTORIES
- C04B—LIME, MAGNESIA; SLAG; CEMENTS; COMPOSITIONS THEREOF, e.g. MORTARS, CONCRETE OR LIKE BUILDING MATERIALS; ARTIFICIAL STONE; CERAMICS; REFRACTORIES; TREATMENT OF NATURAL STONE
- C04B35/00—Shaped ceramic products characterised by their composition; Ceramics compositions; Processing powders of inorganic compounds preparatory to the manufacturing of ceramic products
- C04B35/622—Forming processes; Processing powders of inorganic compounds preparatory to the manufacturing of ceramic products
- C04B35/62204—Forming processes; Processing powders of inorganic compounds preparatory to the manufacturing of ceramic products using waste materials or refuse
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- C—CHEMISTRY; METALLURGY
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- C04B38/00—Porous mortars, concrete, artificial stone or ceramic ware; Preparation thereof
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- C—CHEMISTRY; METALLURGY
- C25—ELECTROLYTIC OR ELECTROPHORETIC PROCESSES; APPARATUS THEREFOR
- C25C—PROCESSES FOR THE ELECTROLYTIC PRODUCTION, RECOVERY OR REFINING OF METALS; APPARATUS THEREFOR
- C25C3/00—Electrolytic production, recovery or refining of metals by electrolysis of melts
- C25C3/06—Electrolytic production, recovery or refining of metals by electrolysis of melts of aluminium
- C25C3/08—Cell construction, e.g. bottoms, walls, cathodes
- C25C3/12—Anodes
- C25C3/125—Anodes based on carbon
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- C—CHEMISTRY; METALLURGY
- C04—CEMENTS; CONCRETE; ARTIFICIAL STONE; CERAMICS; REFRACTORIES
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- C04B2235/00—Aspects relating to ceramic starting mixtures or sintered ceramic products
- C04B2235/60—Aspects relating to the preparation, properties or mechanical treatment of green bodies or pre-forms
- C04B2235/612—Machining
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Abstract
The invention discloses a method for producing porous anode carbon blocks for electrolytic aluminum, which comprises the following steps: calcining petroleum coke in a rotary kiln or a tank furnace to obtain calcined coke, and crushing the calcined coke; putting the crushed calcined coke, anode scrap and raw crushed materials into a preheating screw machine according to the proportion of 71 percent of calcined coke, 26 percent of anode scrap and 3 percent of raw crushed materials, heating and premixing; putting the aggregate and the 180 ℃ asphalt binder into a continuous kneading machine or a kneading pot for kneading to obtain paste; putting the kneaded paste into a powerful cooling machine for cooling; placing the prefabricated aluminum rod bracket into a vibration molding machine; putting the cooled paste into a vibration forming machine provided with an aluminum rod bracket for vibration forming to obtain a green anode carbon block; and (3) precisely drilling the green anode carbon block at a drilling station to clean and expose the end of the aluminum rod support, putting the cleaned green anode carbon block exposed out of the end of the aluminum rod support into a roasting workshop, and cooling to obtain the porous anode carbon block for porous electrolytic aluminum.
Description
Technical Field
The invention relates to a method for producing anode carbon blocks, in particular to a method for producing porous anode carbon blocks for electrolytic aluminum.
Background
Aluminum is the most elemental element in the earth crust, all aluminum in the world is produced by an electrolytic method, the electrolytic aluminum industry has been the important basic industry in China after decades of development, an anode carbon block is a material required by an electrolytic cell during aluminum electrolysis, for a porous anode carbon block, the utilization of anode openings to increase the discharge speed of anode gas is known in the industry for many years, and technical personnel have recently proposed that the carbon consumption in the aluminum electrolysis process can be reduced by passing methane to the openings of the anodes, but no good method is available for realizing the opening of the anodes.
Disclosure of Invention
The technical problem to be solved by the invention is as follows: overcomes the defects of the prior art, and provides a method for producing porous anode carbon blocks for electrolytic aluminum, which has relatively simple process and can improve the production efficiency.
The technical scheme adopted by the invention for solving the technical problem is as follows:
a production method of a porous anode carbon block for electrolytic aluminum comprises the following steps:
s1: calcining petroleum coke in a rotary kiln or a tank furnace at 1250-1350 ℃ to obtain calcined coke;
s2: crushing calcined coke, anode scrap and raw meal into calcined coke, anode scrap and raw meal which meet the granularity requirement, and crushing the calcined coke, anode scrap and raw meal respectively;
s3: placing calcined coke, anode scrap and raw crushed material which are crushed and meet the requirement of granularity into a preheating screw according to the proportion of 71 percent of calcined coke, 26 percent of anode scrap and 3 percent of raw crushed material, heating and premixing, heating to 170 +/-5 ℃, and obtaining uniformly mixed aggregate;
s4: putting the preheated and uniformly mixed aggregate and the 180 ℃ asphalt binder into a continuous kneading machine or a kneading pot for kneading to obtain a paste material, wherein the kneading temperature of the paste material is 160 +/-5 ℃;
s5: putting the kneaded paste with the temperature of 160 +/-5 ℃ into a forced cooler for cooling, and cooling the paste to 150 +/-5 ℃;
s6: placing the prefabricated aluminum rod support into a vibration molding machine, wherein the distance between the end part of the aluminum rod support and the inner wall of the vibration molding machine is less than 0.5 cm;
s7: weighing the cooled paste, putting the weighed paste into a vibration forming machine with an aluminum rod support for vibration forming, wherein the feeding temperature is 150 +/-5 ℃, and the block outlet temperature is 145 +/-5 ℃ to obtain a green anode carbon block;
s8, precisely drilling the green anode carbon block at a drilling station to enable the end of the aluminum rod support to be cleaned and exposed so as to ensure that aluminum liquid flows out during roasting to form a porous anode;
s9: and placing the cleaned green anode carbon block exposed out of the end of the aluminum rod support into a roasting workshop, roasting the green anode carbon block in an open roasting furnace according to a furnace shifting period of 30 hours at a fire channel temperature of 1150 ℃ and an anode temperature of 1080 ℃, melting and flowing out the aluminum rod support in the green anode carbon block in the roasting process, leaving holes, and cooling to obtain the porous anode carbon block for porous electrolytic aluminum.
In step S2, the calcined coke crushed to meet the requirement of granularity comprises coarse coke, medium coke, fine coke and coke breeze, wherein the coarse coke accounts for 17 +/-1% of the total calcined coke and has the granularity of 6-12 mm; the medium coke accounts for 10-11% of the total calcined coke, and the granularity is 3-6 mm; the fine coke accounts for 43 +/-1 percent of the total calcined coke, and the granularity is 0-3 mm; the coke breeze accounts for 30 +/-1% of the total calcined coke, and the granularity is less than or equal to 0.8 mm.
In step S2, the anode scrap refers to an anode scrap of an electrolytic cell, and the anode scrap crushed into a scrap meeting the requirement of particle size includes coarse residue and fine residue, the coarse residue accounts for 38.5 ± 1% of the total anode scrap, and the particle size is 3-12 mm; the fine residue accounts for 61.5 +/-1% of the anode scrap total body, and the particle size is 0-3 mm; the raw bits are unqualified raw blocks or paste materials in a forming workshop, and the raw bits are crushed into raw bits with the granularity of 0-3mm, wherein the raw bits meet the granularity requirement.
In step S4, the mass ratio of the aggregate is 83 to 85% of the total of the aggregate and the liquid asphalt, and the mass ratio of the liquid asphalt is 15 to 17% of the total of the aggregate and the liquid asphalt.
In step S6, the end of the aluminum rod holder can be directly contacted with the inner wall of the vibration molding machine, so that the external air holes are formed during the subsequent baking.
In step S6, the aluminum rod support is woven by a plurality of aluminum rods, the diameter of the aluminum rods is 5-10 mm, the aluminum rod support includes an upper frame, a lower frame and support rods, the upper frame is formed by sequentially connecting at least four aluminum rods from front to back to form a polygonal upper frame with a closed circumference, the lower frame is formed by sequentially connecting at least four aluminum rods from front to back to form a polygonal lower frame with a closed circumference, and the upper frame and the lower frame are connected together by the support rods made of the aluminum rods to form the aluminum rod support with a three-dimensional structure.
The invention has the following positive beneficial effects:
1. according to the invention, the porous anode carbon blocks are manufactured by using the aluminum rod bracket, the anode carbon blocks with different sizes can be manufactured according to the requirements of customers, and the aluminum rod bracket can be melted at high temperature in the roasting process, is insoluble in paste, can flow out of the holes along with the anode carbon blocks, can not generate redundant waste residues for the anode carbon blocks, improves the production efficiency of the porous anode carbon blocks, and improves the product quality.
2. In the invention, the anode carbon block is provided with the plurality of holes, so that the anode gas generated in the aluminum electrolysis process can be smoothly discharged through the porous structure in the anode, the retention time of the anode gas under the anode bottom support is reduced, the voltage drop is reduced, and the effects of low energy consumption and low carbon emission of aluminum electrolysis are realized.
3. According to the invention, the porous anode is produced by adding the aluminum rod bracket during anode forming, the process is relatively simple, the production efficiency can be improved, large-scale production is easy, and holes with different structural forms can be formed.
Drawings
FIG. 1 is a schematic flow diagram of a process for producing a porous anode carbon block for electrolytic aluminum in accordance with the present invention;
fig. 2 is a schematic structural view of the aluminum rod bracket of the present invention.
Detailed Description
The invention will be further explained and explained with reference to the accompanying drawings, fig. 1, fig. 2 and the following detailed description:
in the figure, 1-upper frame, 2-lower frame, 3-support rod.
Example 1: a production method of a porous anode carbon block for electrolytic aluminum comprises the following steps:
s1: calcining the petroleum coke in a rotary kiln or a tank furnace at the temperature of 1300 ℃ to obtain calcined coke;
s2: crushing calcined coke, anode scrap and raw meal into calcined coke, anode scrap and raw meal which meet the granularity requirement, and crushing the calcined coke, anode scrap and raw meal respectively; crushing the calcined coke into calcined coke meeting the granularity requirement, wherein the calcined coke comprises coarse coke, medium coke, fine coke and coke breeze, the coarse coke accounts for 17 percent of the total calcined coke, and the granularity is 6-12 mm; the medium coke accounts for 10 percent of the total calcined coke, and the granularity is 3-6 mm; the fine coke accounts for 43 percent of the total calcined coke, and the granularity is 0-3 mm; the coke breeze accounts for 30 percent of the total calcined coke, and the granularity is less than or equal to 0.8 mm.
The anode scrap refers to an anode scrap of an electrolytic cell, the anode scrap is crushed into the anode scrap meeting the requirement of the granularity, the anode scrap comprises coarse residues and fine residues, the coarse residues account for 38.5% of the total anode scrap, and the granularity is 3-12 mm; the fine residue accounts for 61.5 percent of the anode scrap total body, and the granularity is 0-3 mm; the raw bits are unqualified raw blocks or paste materials in a forming workshop, and the raw bits are crushed into raw bits with the granularity of 0-3mm, wherein the raw bits meet the granularity requirement.
S3: placing calcined coke, anode scrap and raw crushed material which are crushed and meet the requirement of granularity into a preheating screw machine according to the proportion of 71 percent of calcined coke, 26 percent of anode scrap and 3 percent of raw crushed material, heating and premixing, heating to 170 ℃, and obtaining uniformly mixed aggregate;
s4: putting the preheated and uniformly mixed aggregate and the 180 ℃ asphalt binder into a continuous kneading machine or a kneading pot for kneading to obtain a paste material, wherein the kneading temperature of the paste material is 160 ℃; the mass ratio of the aggregate accounts for 83% of the total mass of the aggregate and the liquid asphalt, and the mass ratio of the liquid asphalt accounts for 17% of the total mass of the aggregate and the liquid asphalt.
S5: putting the kneaded paste with the temperature of 160 ℃ into a powerful cooling machine for cooling, and cooling the paste to 150 ℃;
s6: and (3) placing the prefabricated aluminum rod support into a vibration molding machine, wherein the distance between the end part of the aluminum rod support and the inner wall of the vibration molding machine is 0.3 cm.
The aluminum rod support is worked out by a plurality of aluminum rods and is formed, the diameter of aluminum rod is 5-10 mm, the aluminum rod support includes frame 1, underframe 2 and bracing piece 3, go up frame 1 and connect gradually by four aluminum rods front and back end to end, form the closed quadrangle of a circumference and go up frame 1, underframe 2 connects gradually by four other aluminum rods front and back end to end, form the closed quadrangle underframe 2 of a circumference, go up and link together through bracing piece 3 made by the aluminum rod between frame 1 and the underframe 2, form a three-dimensional square structure.
S7: and weighing the cooled paste, putting the weighed paste into a vibration forming machine with an aluminum rod support for vibration forming, wherein the feeding temperature is 150 ℃, and the block outlet temperature is 145 ℃, so as to obtain the green anode carbon block.
S8, precisely drilling the green anode carbon block at a drilling station to enable the end of the aluminum rod support to be exposed, so as to ensure that aluminum liquid flows out during roasting to form a porous anode.
S9: and placing the cleaned green anode carbon block exposed out of the end of the aluminum rod support into a roasting workshop, roasting the green anode carbon block in an open roasting furnace according to a furnace shifting period of 30 hours at a fire channel temperature of 1150 ℃ and an anode temperature of 1080 ℃, melting and flowing out the aluminum rod support in the green anode carbon block in the roasting process, leaving holes, and cooling to obtain the porous anode carbon block for porous electrolytic aluminum.
Example 2: a production method of a porous anode carbon block for electrolytic aluminum comprises the following steps:
s1: calcining the petroleum coke in a rotary kiln or a tank furnace at the temperature of 1300 ℃ to obtain calcined coke;
s2: crushing calcined coke, anode scrap and raw meal into calcined coke, anode scrap and raw meal which meet the granularity requirement, and crushing the calcined coke, anode scrap and raw meal respectively; crushing the calcined coke into calcined coke meeting the granularity requirement, wherein the calcined coke comprises coarse coke, medium coke, fine coke and coke breeze, the coarse coke accounts for 17 percent of the total calcined coke, and the granularity is 6-12 mm; the medium coke accounts for 10 percent of the total calcined coke, and the granularity is 3-6 mm; the fine coke accounts for 43 percent of the total calcined coke, and the granularity is 0-3 mm; the coke breeze accounts for 30 percent of the total calcined coke, and the granularity is less than or equal to 0.8 mm.
The anode scrap refers to an anode scrap of an electrolytic cell, the anode scrap is crushed into the anode scrap meeting the requirement of the granularity, the anode scrap comprises coarse residues and fine residues, the coarse residues account for 38.5% of the total anode scrap, and the granularity is 3-12 mm; the fine residue accounts for 61.5 percent of the anode scrap total body, and the granularity is 0-3 mm; the raw bits are unqualified raw blocks or paste materials in a forming workshop, and the raw bits are crushed into raw bits with the granularity of 0-3mm, wherein the raw bits meet the granularity requirement.
S3: placing the calcined coke, the anode scrap and the raw crushed material which are crushed and meet the requirement of the granularity into a preheating screw machine according to the proportion of 71 percent of calcined coke, 26 percent of anode scrap and 3 percent of raw crushed material, heating and premixing, heating the mixture to 170 ℃, and obtaining uniformly mixed aggregate;
s4: putting the preheated and uniformly mixed aggregate and 180 ℃ asphalt binder into a continuous kneading machine or a kneading pot for kneading to obtain a paste with better plasticity, wherein the kneading temperature of the paste is 160 ℃; the mass ratio of the aggregate accounts for 85% of the total mass of the aggregate and the liquid asphalt, and the mass ratio of the liquid asphalt accounts for 15% of the total mass of the aggregate and the liquid asphalt.
S5: putting the kneaded paste with the temperature of 160 ℃ into a powerful cooling machine for cooling, and cooling the paste to 150 ℃;
s6: and (3) placing the prefabricated aluminum rod bracket into a vibration forming machine, wherein the end part of the aluminum rod bracket is contacted with the inner wall of the vibration forming machine, and forming an external air hole during subsequent roasting.
The aluminum rod support is worked out by a plurality of aluminum rods and is formed, the diameter of aluminum rod is 5-10 mm, the aluminum rod support includes frame 1, underframe 2 and bracing piece 3, go up frame 1 and connect gradually by four aluminum rods front and back end to end, form the closed quadrangle of a circumference and go up frame 1, underframe 2 connects gradually by four other aluminum rods front and back end to end, form the closed quadrangle underframe 2 of a circumference, go up and link together through bracing piece 3 made by the aluminum rod between frame 1 and the underframe 2, form a three-dimensional square structure.
S7: and weighing the cooled paste, putting the weighed paste into a vibration forming machine with an aluminum rod support for vibration forming, wherein the feeding temperature is 150 ℃, the block outlet temperature is 145 ℃, and the green anode carbon block is prepared.
S8, precisely drilling the green anode carbon block at a drilling station to enable the end of the aluminum rod support to be exposed, so as to ensure that aluminum liquid flows out during roasting to form a porous anode.
S9: and placing the cleaned green anode carbon block exposed out of the end of the aluminum rod support into a roasting workshop, roasting the green anode carbon block in an open roasting furnace according to a furnace shifting period of 30 hours at a fire channel temperature of 1150 ℃ and an anode temperature of 1080 ℃, melting and flowing out the aluminum rod support in the green anode carbon block in the roasting process, leaving holes, and cooling to obtain the porous anode carbon block for porous electrolytic aluminum.
The invention is not limited to the above embodiments, and those skilled in the art can make equivalent modifications or substitutions without departing from the spirit of the invention, and such equivalent modifications or substitutions are included in the scope defined by the claims of the present application.
Claims (6)
1. A production method of a porous anode carbon block for electrolytic aluminum comprises the following steps:
s1: calcining petroleum coke in a rotary kiln or a tank furnace at 1250-1350 ℃ to obtain calcined coke;
s2: crushing calcined coke, anode scrap and raw meal into calcined coke, anode scrap and raw meal which meet the granularity requirement, and crushing the calcined coke, anode scrap and raw meal respectively;
s3: placing calcined coke, anode scrap and raw crushed material which are crushed and meet the requirement of granularity into a preheating screw according to the proportion of 71 percent of calcined coke, 26 percent of anode scrap and 3 percent of raw crushed material, heating and premixing, heating to 170 +/-5 ℃, and obtaining uniformly mixed aggregate;
s4: putting the preheated and uniformly mixed aggregate and the 180 ℃ asphalt binder into a continuous kneading machine or a kneading pot for kneading to obtain a paste material, wherein the kneading temperature of the paste material is 160 +/-5 ℃;
s5: putting the kneaded paste with the temperature of 160 +/-5 ℃ into a forced cooler for cooling, and cooling the paste to 150 +/-5 ℃;
s6: placing the prefabricated aluminum rod support into a vibration molding machine, wherein the distance between the end part of the aluminum rod support and the inner wall of the vibration molding machine is less than 0.5 cm;
s7: weighing the cooled paste, putting the weighed paste into a vibration forming machine with an aluminum rod support for vibration forming, wherein the feeding temperature is 150 +/-5 ℃, and the block outlet temperature is 145 +/-5 ℃ to obtain a green anode carbon block;
s8, precisely drilling the green anode carbon block at a drilling station to enable the end of the aluminum rod support to be cleaned and exposed so as to ensure that aluminum liquid flows out during roasting to form a porous anode;
s9: and placing the cleaned green anode carbon block exposed out of the end of the aluminum rod support into a roasting workshop, roasting the green anode carbon block in an open roasting furnace according to a furnace shifting period of 30 hours at a fire channel temperature of 1150 ℃ and an anode temperature of 1080 ℃, melting and flowing out the aluminum rod support in the green anode carbon block in the roasting process, leaving holes, and cooling to obtain the porous anode carbon block for porous electrolytic aluminum.
2. The method for producing the porous anode carbon block for electrolytic aluminum according to claim 1, which is characterized in that: in step S2, the calcined coke crushed to meet the requirement of granularity comprises coarse coke, medium coke, fine coke and coke breeze, wherein the coarse coke accounts for 17 +/-1% of the total calcined coke and has the granularity of 6-12 mm; the medium coke accounts for 10-11% of the total calcined coke, and the granularity is 3-6 mm; the fine coke accounts for 43 +/-1 percent of the total calcined coke, and the granularity is 0-3 mm; the coke breeze accounts for 30 +/-1% of the total calcined coke, and the granularity is less than or equal to 0.8 mm.
3. The method for producing the porous anode carbon block for electrolytic aluminum according to claim 1, which is characterized in that: in step S2, the anode scrap refers to an anode scrap of an electrolytic cell, and the anode scrap crushed into a scrap meeting the requirement of particle size includes coarse residue and fine residue, the coarse residue accounts for 38.5 ± 1% of the total anode scrap, and the particle size is 3-12 mm; the fine residue accounts for 61.5 +/-1% of the anode scrap total body, and the particle size is 0-3 mm; the raw bits are unqualified raw blocks or paste materials in a forming workshop, and the raw bits are crushed into raw bits with the granularity of 0-3mm, wherein the raw bits meet the granularity requirement.
4. The method for producing the porous anode carbon block for electrolytic aluminum according to claim 1, which is characterized in that: in step S4, the mass ratio of the aggregate is 83 to 85% of the total of the aggregate and the liquid asphalt, and the mass ratio of the liquid asphalt is 15 to 17% of the total of the aggregate and the liquid asphalt.
5. The method for producing the porous anode carbon block for electrolytic aluminum according to claim 1, which is characterized in that: in step S6, the end of the aluminum rod holder can be directly contacted with the inner wall of the vibration molding machine, so that the external air holes are formed during the subsequent baking.
6. The method for producing the porous anode carbon block for electrolytic aluminum according to claim 1, which is characterized in that: in step S6, the aluminum rod support is woven by a plurality of aluminum rods, the diameter of the aluminum rods is 5-10 mm, the aluminum rod support includes an upper frame, a lower frame and support rods, the upper frame is formed by sequentially connecting at least four aluminum rods from front to back to form a polygonal upper frame with a closed circumference, the lower frame is formed by sequentially connecting at least four aluminum rods from front to back to form a polygonal lower frame with a closed circumference, and the upper frame and the lower frame are connected together through the support rods to form the aluminum rod support with a three-dimensional structure.
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