CN109898100B - Prebaked continuous independent reinforced carbon bowl anode carbon block structure and preparation method thereof - Google Patents
Prebaked continuous independent reinforced carbon bowl anode carbon block structure and preparation method thereof Download PDFInfo
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- CN109898100B CN109898100B CN201910324967.8A CN201910324967A CN109898100B CN 109898100 B CN109898100 B CN 109898100B CN 201910324967 A CN201910324967 A CN 201910324967A CN 109898100 B CN109898100 B CN 109898100B
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Abstract
The invention discloses a prebaked continuous independent reinforced carbon bowl anode carbon block structure and a preparation method thereof. The carbon bowl assembly is characterized by comprising a carbon block body, wherein a carbon bowl assembly connecting pit is arranged at the upper end of the carbon block body, a reinforced carbon bowl assembly is arranged in the carbon bowl assembly connecting pit, a carbon bowl is arranged on the reinforced carbon bowl assembly, and a mechanical steel claw connecting ring groove is formed in the reinforced carbon bowl assembly at the bottom of the carbon bowl. The invention has no generation of residual anode, improves the utilization rate of the anode carbon block from 70-80% of the traditional utilization rate to nearly 100%, can reduce the production cost of electrolytic aluminum, has stable working condition of the electrolytic bath, relatively low electrical loss and heat energy saving, can ensure that no crack and crack are generated when a carbon bowl assembly works on the electrolytic bath by matching with the aluminum water casting-mechanical composite steel claw and the anode carbon block (patent No. 201710088066.4) with a corresponding structure, does not leak the aluminum water of the carbon bowl, simultaneously improves the mechanical strength of a mechanical steel claw connecting ring groove at the bottom of the carbon bowl, and ensures that the connection is firmer and more reliable.
Description
Technical Field
The invention relates to a prebaked continuous independent reinforced carbon bowl anode carbon block structure and a preparation method thereof, in particular to the technical field of anode carbon blocks.
Background
In the modern electrolytic aluminum industry, prebaked anodes are used to produce electrolytic aluminum. The prebaked anode is generally rectangular and has a stable geometric shape, the prebaked anode has different sizes according to the size of the current of the electrolytic cell and the difference of the process by taking the stone tar and the pitch as aggregates and coal pitch as binders, the current density is generally within the range of 0.68-0.9A/cm 2, and the service cycle of each anode carbon block is generally about 30 days. In the electrolytic aluminum production process, the carbon anode continuously reacts with oxygen decomposed by the electrolysis of alumina at high temperature, carbon dioxide gas is released and continuously consumed, the carbon anode needs to be replaced at regular time, and the replaced anode carbon block is called as anode scrap in the industry. The prebaked aluminum electrolysis production must generate a large amount of anode scrap, the generation of no anode scrap is in the last 60-70 th century, and the industrial dream that the prebaked aluminum electrolysis process is not realized until the prebaked aluminum electrolysis process is mature is realized.
In the existing production of prebaked anode electrolytic aluminum, an anode steel claw and an anode carbon block are all connected in a phosphorus pig iron casting manner, 2-4 circular grooves with the diameter of 160-180mm and the depth of 80-110mm are arranged on the upper surface of the prebaked anode carbon block in the conducting direction and are commonly called carbon bowls, when an anode is assembled, the carbon bowls are used for placing anode claw heads, the anode claw heads are cast in the carbon bowls by phosphorus pig iron, the anode steel claw heads and an aluminum conducting rod are connected through aluminum steel explosion welding, so that the anode conducting rod and the anode carbon block are connected into a whole to form an anode carbon block group, and the phosphorus pig iron casting type prebaked anode carbon block group is the only anode production manner currently used by prebaked electrolytic cells. The anode production mode can not be orderly disassembled when the anode is replaced, and only anode scrap and an anode steel claw cast by phosphorus pig iron can be destructively disassembled, so that a large amount of anode scrap is generated.
At present, the traditional anode scrap is treated in an anode assembly workshop in such a way that after the scrap connected with a conducting rod is broken and falls off, an anode steel bowl poured by phosphorus pig iron is broken and the aluminum conducting rod after the scrap is used for a new anode carbon block, and the aluminum conducting rod is recycled, so that time and labor are wasted in the replacement process of the anode carbon block, meanwhile, a large amount of heat on the anode scrap is also taken away and cannot be utilized, and the anode carbon block and a steel claw can be normally conducted after being reheated to a certain temperature when the new anode is inserted into an electrolytic cell, thereby causing heat waste and reducing the electrolytic efficiency.
The existing prebaked anode carbon block is a disposable production and consumption material product, and the existing anode carbon block process has the defects of cracking, chipping and particle dropping due to large internal stress. When the crack is a cross grain, the current can not pass through, and the product is regarded as an unqualified product and can only be directly scrapped and recycled as a raw material. The anode carbon block should also be changed by internal stress during the electrolytic combustion process, and the falling of the anode carbon block in the tank and the generation of cracks are often caused. When the aluminum water casting-mechanical composite steel claw and the anode carbon block (patent No. 201710088066.4) with the corresponding structure invented by the inventor are used in cooperation, aluminum water leakage is caused certainly, the carbon bowl and the steel claw which leak the aluminum water are not conductive, and power failure is caused after an electrolyte is immersed into a transverse crack.
When the existing prebaked anode carbon block is used for changing the anode, firstly, the heat insulation materials around the anode scrap must be carefully knocked off by a multifunctional crown block, and then the guide rod, the steel claw and the anode scrap combined body are pulled out by a strong force. When the anode scrap is removed, a large amount of heat energy is taken away by the high-temperature anode scrap, and the molten electrolyte is directly exposed in front of eyes, so that huge heat energy loss is caused by high temperature of 930-950 ℃, large-area heat radiation and convection. The replaced new anode is directly inserted into the electrolyte, a large amount of heat energy needs to be absorbed, the electrolyte condensed on the surface of the cold anode carbon block enables the new anode carbon block to be non-conductive, and the new anode carbon block can normally work only after being replaced about one day.
At present, the traditional anode scrap is treated in an anode assembly workshop in such a way that after the scrap connected with a conducting rod is broken and falls off, an anode steel bowl poured by phosphorus pig iron is broken and the aluminum conducting rod after the scrap is used for a new anode carbon block, and the aluminum conducting rod is recycled, so that time and labor are wasted in the replacement process of the anode carbon block, meanwhile, a large amount of heat on the anode scrap is also taken away and cannot be utilized, and the anode carbon block and a steel claw can be normally conducted after being reheated to a certain temperature when the new anode is inserted into an electrolytic cell, thereby causing heat waste and reducing the electrolytic efficiency.
The production amount of anode scrap is 10-15% of the production amount of aluminum ingots generally, so that great waste is generated, the anode scrap is as high as 400-600 ten thousand tons per year according to about 4000 million tons of electrolytic aluminum produced in China, the value of the anode carbon block wasted every year is about 150-220 million yuan according to 3700 yuan/ton value of the anode carbon block, more waste is generated all over the world, the anode scrap is soaked in molten electrolyte of an electrolytic cell for a long time, because the prebaked anode has a porosity of 15% -18%, the molten electrolyte is greatly permeated into pores of the anode carbon block under the long-time soaking, and when the anode scrap is removed from the electrolytic cell, a plurality of heat preservation materials containing fluoride salts are firmly adhered to the surface of the anode scrap. The discarded anode scrap contains a large amount of fluoride salt, which not only causes the waste of carbon materials and fluoride salt, but also seriously pollutes the environment.
The applicant of the present invention also applies a series of patents of the structure and the manufacturing method of the continuous prebaked anode carbon block and applies a series of aluminum water casting-mechanical composite anode steel claws which are convenient for anode pole changing, refer to patent No. 201710088066.4, the anode steel claws can be orderly disassembled from the burnt anode carbon block, but the connection mode of aluminum water casting does not allow cracks and fissures at the bottom and the periphery of the carbon bowl to exist, which can cause aluminum water leakage in the carbon bowl, and the anode steel claws are not conductive, thus damaging electrolytic production.
In summary, the prior art has the following technical problems:
1. the process for replacing the old anode carbon block is complex, and a large amount of anode scrap is generated;
2. when a new anode carbon block is replaced, a large amount of heat on the anode residual anode is taken away and cannot be utilized, and when the new anode is inserted into the electrolytic bath, the anode carbon block and the steel claw need to be reheated to a certain temperature and then can be normally conducted, so that heat waste is caused, and the electrolysis efficiency is reduced;
3. when the aluminum water casting-mechanical composite steel claw and the anode carbon block (patent No. 201710088066.4) with the corresponding structure invented by the inventor are used in cooperation with the aluminum water casting-mechanical composite steel claw and the anode carbon block (patent No. 201710088066.4), aluminum water leakage is caused certainly, a carbon bowl and the steel claw which leak the aluminum water are not conductive, and power failure is caused after an electrolyte is immersed into the transverse crack.
Disclosure of Invention
The invention aims to provide a prebaked continuous independent reinforced carbon bowl anode carbon block structure and a preparation method thereof. The invention has no generation of residual anode, improves the utilization rate of the anode carbon block from 70-80% of the traditional utilization rate to nearly 100%, can reduce the production cost of electrolytic aluminum, has stable working condition of the electrolytic bath, relatively low electrical loss and heat energy saving, can ensure that no crack and crack are generated when a carbon bowl assembly works on the electrolytic bath by matching with the aluminum water casting-mechanical composite steel claw and the anode carbon block (patent No. 201710088066.4) with a corresponding structure, does not leak the aluminum water of the carbon bowl, simultaneously improves the mechanical strength of a mechanical steel claw connecting ring groove at the bottom of the carbon bowl, and ensures that the connection is firmer and more reliable.
The technical scheme of the invention is as follows: a prebaked continuous and independent reinforced carbon bowl anode carbon block structure comprises a carbon block body, wherein a carbon bowl assembly connecting pit is arranged at the upper end of the carbon block body, a reinforced carbon bowl assembly is arranged in the carbon bowl assembly connecting pit, a carbon bowl is arranged on the reinforced carbon bowl assembly, and a mechanical steel claw connecting ring groove is arranged on the reinforced carbon bowl assembly at the bottom of the carbon bowl.
In the prebaked continuous independent reinforced carbon bowl anode carbon block structure, a prefabricated split carbon bowl filling block is movably arranged in the carbon bowl on the reinforced carbon bowl assembly.
In the prebaked continuous independent reinforced carbon bowl anode carbon block structure, the center of the upper part of the carbon block body is movably provided with the connecting raised head through the connecting raised head bonding groove, and the center of the bottom of the carbon block body is provided with the connecting groove.
In the prebaked continuous independent reinforced carbon bowl anode carbon block structure, the upper and lower surfaces of the carbon block body are provided with 1-2mm stemming layers.
The preparation method of the prebaked continuous independent reinforced carbon bowl anode carbon block structure is characterized by comprising the following steps of: the method comprises the following steps:
a. preparing a carbon block body, a prefabricated split carbon bowl filling block and a connecting raised head by adopting anode carbon block materials;
b. respectively crushing and screening petroleum coke particles, carbon fibers and asphalt, mixing, stirring at constant temperature, and performing vibration molding or extrusion molding to obtain a reinforced carbon bowl assembly matrix;
c. roasting and cooling the reinforced carbon bowl assembly matrix to obtain a reinforced carbon bowl assembly;
d. and coating asphalt on the connection part of the reinforced carbon bowl assembly, embedding the reinforced carbon bowl assembly into the connection pit of the carbon bowl assembly on the carbon block body, roasting and cooling, and coating stemming on the upper surface and the lower surface of the carbon block body to form a 1-2mm mud bubble layer on the upper surface and the lower surface of the carbon block body to obtain the independent reinforced carbon bowl anode carbon block.
In the preparation method of the prebaked continuous independent reinforced carbon bowl anode carbon block structure, in the step b, 80-85 parts by weight of petroleum coke particles, 0.5-5 parts by weight of carbon fibers and 14-18 parts by weight of asphalt are used.
In the preparation method of the prebaked continuous independent reinforced carbon bowl anode carbon block structure, the length of the carbon fiber is 5-20 mm.
In the preparation method of the prebaked continuous independent reinforced carbon bowl anode carbon block structure, in the step c, the baking temperature is 1100-1200 ℃, and the sintering time is 24-36 h.
In the preparation method of the prebaked continuous independent reinforced carbon bowl anode carbon block structure, in the step d, the baking temperature is 700-800 ℃, and the baking time is 2-4 h.
Compared with the prior art, the invention has the following effects:
1. according to the invention, petroleum coke particles, carbon fibers and asphalt are respectively crushed, screened and mixed, the mixture is stirred at a constant temperature and then is subjected to vibration molding or extrusion molding to obtain a reinforced carbon bowl assembly matrix, the reinforced carbon bowl assembly matrix is roasted and cooled to obtain a reinforced carbon bowl assembly, the length of the carbon fibers added into the reinforced carbon bowl assembly is 5-20mm, and the carbon fibers are distributed in a network shape in the reinforced carbon bowl assembly body through a series of processing such as kneading, roasting and the like, so that the particle falling of the surface of the reinforced carbon bowl assembly in the transportation and installation processes can be greatly reduced due to the pulling of tough carbon fibers;
2. the reinforced carbon bowl assembly has the advantages that due to the addition of the carbon fibers, the fine carbon fibers can pull the carbon particles from different directions simultaneously, the carbon fibers are oxidation-resistant compared with the carbon particles and the carbonized bonding layer, and under the same condition, the pulling effect of the carbon fibers can reduce the falling of the carbon particles, delay the falling time of the carbon particles, reduce the particle size of the falling carbon particles, and greatly reduce the generation amount of the fire hole carbon slag which is a dangerous waste causing current empty consumption and waste of carbon materials and seriously polluting the environment;
3. the carbon fiber is added into the reinforced carbon bowl assembly, the sodium etching resistance and the high tensile strength of the carbon bowl assembly can be improved, cracks and cracks are prevented from being generated at the bottom of the carbon bowl and the carbon bowl assemblies around the carbon bowl assembly, aluminum water leakage in the carbon bowl when the carbon bowl anode carbon block works on the electrolytic cell is avoided being independently reinforced, the mechanical strength of the carbon bowl is enhanced by the reinforced carbon bowl assembly with the carbon fiber, the reliability and the firmness of the carbon block body hung on the mechanical steel claw through the reinforced carbon bowl assembly after aluminum water cast in the carbon bowl is molten are guaranteed, the stable work of the electrolytic cell is guaranteed, and the effects of good energy conservation, consumption reduction and environmental pollution reduction are achieved.
4. The reinforced carbon bowl assembly at the bottom of the carbon bowl is provided with a mechanical steel claw connecting ring groove, which is beneficial to the ordered disassembly between the aluminum water casting-mechanical composite steel claw and the anode carbon block when the aluminum water casting-mechanical composite steel claw and the anode carbon block (patent No. 201710088066.4) with the corresponding structure invented by the inventor are used, the generation of anode residual anode is eliminated, and the environmental pollution is effectively reduced.
5. The aluminum water casting-mechanical composite steel claw is connected with the independent reinforced carbon bowl anode carbon block upper carbon bowl, the steel claw sheet on the aluminum water casting-mechanical composite steel claw enters the mechanical steel claw connecting ring groove on the reinforced carbon bowl assembly at the bottom of the carbon bowl of the carbon block body, the steel claw sheet on the aluminum water casting-mechanical composite steel claw is connected with the independent reinforced carbon bowl anode carbon block upper carbon bowl through aluminum water casting, and the aluminum water casting-mechanical composite steel claw is in rigid connection with the independent reinforced carbon bowl anode carbon block at normal temperature. . When the carbon block body on the independent reinforced carbon bowl anode carbon block is electrolyzed and consumed on an electrolytic bath to the thickness of 250-300mm, the carbon block is an old anode carbon block which is the best time for connecting a new anode carbon block, aluminum water in the carbon bowl on the reinforced carbon bowl assembly is molten and the aluminum water in the carbon bowl plays a role in aluminum water casting-mechanical composite steel claw and carbon bowl and anode carbon block body electric conduction in the process of using the independent reinforced carbon bowl anode carbon block on the electrolytic bath, meanwhile, a steel claw sheet on the aluminum water casting-mechanical composite steel claw can be freely unlocked and rotated in molten aluminum water, the aluminum water casting-mechanical composite steel claw on the old anode carbon block body is unlocked from a mechanical steel claw connecting ring groove on the reinforced carbon bowl assembly at the bottom of the carbon bowl, the aluminum water casting-mechanical composite steel claw is taken out, then the aluminum water casting-mechanical composite steel claw is connected with the new independent reinforced carbon bowl anode carbon block, for standby, because the hardened heat-insulating covering material at the periphery of the carbon block body of the old anode carbon block supports, the carbon block body of the old anode carbon block is always left on the electrolytic bath and does not move in situ, and the carbon block body can not fall down after the aluminum water casting-mechanical composite steel claw and can bear huge force and also cannot fall down;
6. when connecting a new anode carbon block on aluminum water casting-mechanical composite steel with an old anode carbon block, firstly smearing foam mud on a prefabricated split carbon bowl filling block, inserting the carbon bowl into a carbon bowl on a reinforced carbon bowl assembly on a carbon block body of the old anode carbon block, extruding and leveling aluminum water in the carbon bowl, then sticking the connection convex head smearing foam mud in the middle of the upper part of the old anode carbon block body, sticking the connection convex head in a groove, smearing foam mud on the connection convex head on the old anode carbon block body and the surface of the prefabricated split carbon bowl filling block, positioning and butting the new anode carbon block on the aluminum water casting-mechanical composite steel with the old anode carbon block, and enabling the connection convex head on the carbon block body of the old anode carbon block to enter a connection groove in the middle of the bottom of the new anode carbon block body. The method is characterized in that a prefabricated stemming layer with the thickness of 1-2mm is adhered to the bottom surface of a carbon block body, stemming is used for filling up gaps between upper planes and lower planes of new and old carbon blocks under the high-temperature softening of the old anode carbon blocks and the gravity extrusion of the new anode carbon blocks and steel claws, then the stemming is sintered by utilizing the self high temperature of an electrolytic cell, the stable adhesion, the electric conduction and the continuous use of the new and old anode carbon blocks are realized, the generation of residual poles is eliminated, the utilization rate of the anode carbon blocks is improved to be close to 100% from 70-80% originally, and the ton aluminum consumption of the anode carbon blocks in the production process of electrolytic aluminum can be greatly reduced.
In conclusion, the invention has the advantages of no generation of residual anode, capability of improving the utilization rate of the anode carbon block from 70-80% of the traditional utilization rate to nearly 100%, capability of reducing the production cost of electrolytic aluminum, stable working condition of the electrolytic cell, relatively low electric loss and heat energy saving, capability of ensuring that no crack or crack is generated when a carbon bowl assembly works on the electrolytic cell and no carbon bowl aluminum water leakage occurs when the aluminum water casting-mechanical composite steel claw and the anode carbon block (patent No. 201710088066.4) with the corresponding structure invented by the inventor are matched for use, and capability of improving the mechanical strength of a mechanical steel claw connecting ring groove at the bottom of the carbon bowl and further ensuring that the connection is firmer and more reliable.
Drawings
FIG. 1 is a schematic structural view of the present invention;
fig. 2 is a schematic diagram of the operation of the present invention.
The labels in the figures are: 1-carbon block body, 2-connecting groove, 3-mud layer, 4-mechanical steel claw connecting ring groove, 5-carbon bowl, 6-reinforced carbon bowl assembly, 7-connecting raised head, 8-connecting raised head bonding groove, 9-prefabricated split carbon bowl filling block and 10-carbon bowl assembly connecting pit.
Detailed Description
The invention is further illustrated by the following figures and examples, which are not to be construed as limiting the invention.
Example 1. A prebaked continuous independent reinforced carbon bowl anode carbon block structure and a preparation method thereof are shown in a figure 1-2 and comprise a carbon block body 1, wherein the upper end of the carbon block body 1 is provided with a carbon bowl assembly connecting pit 10, a reinforced carbon bowl assembly 6 is arranged in the carbon bowl assembly connecting pit 10, a carbon bowl 5 is arranged on the reinforced carbon bowl assembly 6, and a mechanical steel claw connecting ring groove 4 is arranged on the reinforced carbon bowl assembly 6 at the bottom of the carbon bowl 5.
And a prefabricated split carbon bowl filling block 9 is movably arranged in the carbon bowl 5 on the reinforced carbon bowl assembly 6.
The middle of the upper part of the carbon block body 1 is movably provided with a connecting raised head 7 through a connecting raised head bonding groove 8, and the middle of the bottom of the carbon block body 1 is provided with a connecting groove 2.
The upper surface and the lower surface of the carbon block body 1 are both provided with stemming layers 3 with the thickness of 1-2 mm.
The preparation method of the prebaked continuous independent reinforced carbon bowl anode carbon block structure comprises the following steps:
a. respectively preparing a carbon block body 1, a prefabricated split carbon bowl filling block 9 and a connecting raised head 7 by adopting anode carbon block materials;
b. respectively crushing and screening 80kg of petroleum coke particles, 0.5kg of carbon fiber and 14kg of asphalt, mixing, stirring at constant temperature, and performing vibration molding or extrusion molding to obtain a matrix of the reinforced carbon bowl assembly 6; the length of the carbon fiber is 5-20 mm;
c. roasting the matrix of the reinforced carbon bowl assembly 6 at 1100 ℃ for 24h, and cooling to obtain the reinforced carbon bowl assembly 6;
d. coating asphalt on the connecting part of the reinforced carbon bowl assembly 6, embedding the reinforced carbon bowl assembly into the carbon bowl assembly connecting concave pit 10 on the carbon block body 1, roasting at the roasting and roasting temperature of 700 ℃, roasting for 2 hours, cooling, and coating stemming on the upper surface and the lower surface of the carbon block body 1 to form a 1-2mm stemming layer 3 on the upper surface and the lower surface of the carbon block body 1 to obtain the independent reinforced carbon bowl anode carbon block.
When the aluminum water casting-mechanical composite steel claw is used, the aluminum water casting-mechanical composite steel claw is connected with the independent reinforced carbon bowl anode carbon block upper carbon bowl 5, a steel claw sheet on the aluminum water casting-mechanical composite steel claw enters a mechanical steel claw connecting ring groove 4 on a reinforced carbon bowl assembly 6 at the bottom of the carbon bowl 5 of the carbon block body 1, the steel claw sheet on the aluminum water casting-mechanical composite steel claw is connected with the independent reinforced carbon bowl anode carbon block upper carbon bowl 5 through aluminum water casting, and the aluminum water casting-mechanical composite steel claw is in rigid connection with the independent reinforced carbon bowl anode carbon block at normal temperature.
Aluminum water casting-mechanical composite steel claw drives the independent reinforced carbon bowl anode carbon block to enter an electrolytic bath for use, when the carbon block body 1 on the independent reinforced carbon bowl anode carbon block is an old anode carbon block when the electrolytic consumption on the electrolytic bath reaches 300mm thick, the carbon block body is the old anode carbon block, the best time is for connecting a new anode carbon block, in the process of using the independent reinforced carbon bowl anode carbon block on the electrolytic bath, the aluminum water in the carbon bowl 5 on the reinforced carbon bowl assembly 6 is molten, the aluminum water in the carbon bowl 5 plays a role in aluminum water casting-mechanical composite steel claw and carbon bowl 5 as well as the anode carbon block body 1 are conductive, the reinforced carbon bowl assembly 6 can avoid the leakage of the aluminum water in the carbon bowl 5 when the independent reinforced carbon bowl anode carbon block works on the electrolytic bath, and simultaneously the steel claw sheet on the aluminum water casting-mechanical composite steel claw can freely unlock and rotate in the molten aluminum water, the aluminum water casting-mechanical composite steel claw on the carbon block body 1 of the old anode carbon block is unlocked from the mechanical steel claw connecting ring groove 4 on the reinforced carbon bowl assembly 6 at the bottom of the carbon bowl 5, the aluminum water casting-mechanical composite steel claw is taken out, then the aluminum water casting-mechanical composite steel claw is connected with a new independent reinforced carbon bowl anode carbon block for standby, the carbon block body 1 of the old anode carbon block is always kept on the electrolytic bath for being immobilized due to the heat preservation covering material hardened around the carbon block body 1 of the old anode carbon block, and the aluminum water casting-mechanical composite steel claw cannot fall down and can bear huge force;
when connecting a new anode carbon block on molten aluminum casting-mechanical composite steel with an old anode carbon block, firstly smearing foam mud on a prefabricated split carbon bowl filling block 9, inserting the carbon bowl filling block into a carbon bowl 5 on a reinforced carbon bowl assembly 6 on the old anode carbon block body 1, extruding and leveling aluminum water in the carbon bowl 5, then smearing foam mud on a connecting convex head 7, adhering the foam mud to the center of the upper part of the old anode carbon block body 1 through a connecting convex head adhering groove 8, smearing foam mud on the connecting convex head 7 on the old anode carbon block body 1 and the surface of the prefabricated split carbon bowl filling block 9, positioning and butting the new anode carbon block on the molten aluminum casting-mechanical composite steel with the old anode carbon block, and enabling the connecting convex head 7 on the carbon block body 1 of the old anode carbon block to enter a connecting groove 2 in the center of the bottom of the carbon block body 1 of the new anode carbon block. The prefabricated stemming layer 3 with the thickness of 1-2mm is adhered to the bottom surface of the carbon block body 1, stemming is used for filling up gaps between upper planes and lower planes of new and old carbon blocks under the high-temperature softening of the old anode carbon blocks and the gravity extrusion of the new anode carbon blocks and steel claws, then the stemming is sintered by utilizing the self high temperature of the electrolytic bath, the stable adhesion, the electric conduction and the continuous use of the new and old anode carbon blocks are realized, the generation of residual poles is eliminated, the utilization rate of the anode carbon blocks is improved to be close to 100 percent from the original 70-80 percent, and the ton aluminum consumption of the anode carbon blocks in the production process of electrolytic aluminum can be greatly reduced.
Example 2. A prebaked continuous independent reinforced carbon bowl anode carbon block structure and a preparation method thereof are shown in a figure 1-2 and comprise a carbon block body 1, wherein the upper end of the carbon block body 1 is provided with a carbon bowl assembly connecting pit 10, a reinforced carbon bowl assembly 6 is arranged in the carbon bowl assembly connecting pit 10, a carbon bowl 5 is arranged on the reinforced carbon bowl assembly 6, and a mechanical steel claw connecting ring groove 4 is arranged on the reinforced carbon bowl assembly 6 at the bottom of the carbon bowl 5.
And a prefabricated split carbon bowl filling block 9 is movably arranged in the carbon bowl 5 on the reinforced carbon bowl assembly 6.
The middle of the upper part of the carbon block body 1 is movably provided with a connecting raised head 7 through a connecting raised head bonding groove 8, and the middle of the bottom of the carbon block body 1 is provided with a connecting groove 2.
The upper surface and the lower surface of the carbon block body 1 are both provided with stemming layers 3 with the thickness of 1-2 mm.
The preparation method of the prebaked continuous independent reinforced carbon bowl anode carbon block structure comprises the following steps:
a. respectively preparing a carbon block body 1, a prefabricated split carbon bowl filling block 9 and a connecting raised head 7 by adopting anode carbon block materials;
b. respectively crushing and screening 82kg of petroleum coke particles, 2kg of carbon fiber and 15kg of asphalt, mixing, stirring at constant temperature, and performing vibration molding or extrusion molding to obtain a matrix of the reinforced carbon bowl assembly 6; the length of the carbon fiber is 5-20 mm;
c. roasting the matrix of the reinforced carbon bowl assembly 6 at 1130 ℃ for 28h, and cooling to obtain the reinforced carbon bowl assembly 6;
d. coating asphalt on the connecting part of the reinforced carbon bowl assembly 6, embedding the reinforced carbon bowl assembly into the carbon bowl assembly connecting concave pit 10 on the carbon block body 1, roasting at the roasting temperature of 730 ℃ for 3h, cooling, and coating stemming on the upper surface and the lower surface of the carbon block body 1 to form a 1-2mm stemming layer 3 on the upper surface and the lower surface of the carbon block body 1 to obtain the independent reinforced carbon bowl anode carbon block.
The method of use of the present invention is the same as in example 1.
Example 3. A prebaked continuous independent reinforced carbon bowl anode carbon block structure and a preparation method thereof are shown in a figure 1-2 and comprise a carbon block body 1, wherein the upper end of the carbon block body 1 is provided with a carbon bowl assembly connecting pit 10, a reinforced carbon bowl assembly 6 is arranged in the carbon bowl assembly connecting pit 10, a carbon bowl 5 is arranged on the reinforced carbon bowl assembly 6, and a mechanical steel claw connecting ring groove 4 is arranged on the reinforced carbon bowl assembly 6 at the bottom of the carbon bowl 5.
And a prefabricated split carbon bowl filling block 9 is movably arranged in the carbon bowl 5 on the reinforced carbon bowl assembly 6.
The middle of the upper part of the carbon block body 1 is movably provided with a connecting raised head 7 through a connecting raised head bonding groove 8, and the middle of the bottom of the carbon block body 1 is provided with a connecting groove 2.
The upper surface and the lower surface of the carbon block body 1 are both provided with stemming layers 3 with the thickness of 1-2 mm.
The preparation method of the prebaked continuous independent reinforced carbon bowl anode carbon block structure comprises the following steps:
a. respectively preparing a carbon block body 1, a prefabricated split carbon bowl filling block 9 and a connecting raised head 7 by adopting anode carbon block materials;
b. respectively crushing and screening 84kg of petroleum coke particles, 4kg of carbon fiber and 16kg of asphalt, mixing, stirring at constant temperature, and performing vibration molding or extrusion molding to obtain a matrix of the reinforced carbon bowl assembly 6; the length of the carbon fiber is 5-20 mm;
c. roasting the matrix of the reinforced carbon bowl assembly 6 at 1160 ℃ for 32h, and cooling to obtain the reinforced carbon bowl assembly 6;
d. coating asphalt on the connecting part of the reinforced carbon bowl assembly 6, embedding the reinforced carbon bowl assembly into the carbon bowl assembly connecting pit 10 on the carbon block body 1, roasting at 770 ℃ for 4h, cooling, and coating stemming on the upper and lower surfaces of the carbon block body 1 to form 1-2mm of stemming layers 3 on the upper and lower surfaces of the carbon block body 1 to obtain the independent reinforced carbon bowl anode carbon block.
The method of use of the present invention is the same as in example 1.
Example 4. A prebaked continuous independent reinforced carbon bowl anode carbon block structure and a preparation method thereof are shown in a figure 1-2 and comprise a carbon block body 1, wherein the upper end of the carbon block body 1 is provided with a carbon bowl assembly connecting pit 10, a reinforced carbon bowl assembly 6 is arranged in the carbon bowl assembly connecting pit 10, a carbon bowl 5 is arranged on the reinforced carbon bowl assembly 6, and a mechanical steel claw connecting ring groove 4 is arranged on the reinforced carbon bowl assembly 6 at the bottom of the carbon bowl 5.
And a prefabricated split carbon bowl filling block 9 is movably arranged in the carbon bowl 5 on the reinforced carbon bowl assembly 6.
The middle of the upper part of the carbon block body 1 is movably provided with a connecting raised head 7 through a connecting raised head bonding groove 8, and the middle of the bottom of the carbon block body 1 is provided with a connecting groove 2.
The upper surface and the lower surface of the carbon block body 1 are both provided with stemming layers 3 with the thickness of 1-2 mm.
The preparation method of the prebaked continuous independent reinforced carbon bowl anode carbon block structure comprises the following steps:
a. respectively preparing a carbon block body 1, a prefabricated split carbon bowl filling block 9 and a connecting raised head 7 by adopting anode carbon block materials;
b. crushing and screening 85kg of petroleum coke particles, 5kg of carbon fiber and 18kg of asphalt respectively, mixing, stirring at constant temperature, and performing vibration molding or extrusion molding to obtain a matrix of the reinforced carbon bowl assembly 6; the length of the carbon fiber is 5-20 mm;
c. roasting the matrix of the reinforced carbon bowl assembly 6 at 1200 ℃, sintering for 36h, and cooling to obtain the reinforced carbon bowl assembly 6;
d. coating asphalt on the connecting part of the reinforced carbon bowl assembly 6, embedding the reinforced carbon bowl assembly into the carbon bowl assembly connecting concave pit 10 on the carbon block body 1, roasting at the roasting and roasting temperature of 800 ℃ for 4h, cooling, and coating stemming on the upper surface and the lower surface of the carbon block body 1 to form a 1-2mm stemming layer 3 on the upper surface and the lower surface of the carbon block body 1 to obtain the independent reinforced carbon bowl anode carbon block.
The method of use of the present invention is the same as in example 1.
Claims (4)
1. A prebaked continuous independent reinforced carbon bowl anode carbon block structure is characterized in that: the carbon bowl assembly structure comprises a carbon block body (1), wherein a carbon bowl assembly connecting pit (10) is formed in the upper end of the carbon block body (1), a reinforced carbon bowl assembly (6) is arranged in the carbon bowl assembly connecting pit (10), a carbon bowl (5) is arranged on the reinforced carbon bowl assembly (6), and a mechanical steel claw connecting ring groove (4) is formed in the reinforced carbon bowl assembly (6) at the bottom of the carbon bowl (5);
a prefabricated split carbon bowl filling block (9) is movably arranged in the carbon bowl (5) on the reinforced carbon bowl assembly (6);
the middle of the upper part of the carbon block body (1) is movably provided with a connecting raised head (7) through a connecting raised head bonding groove (8), and the middle of the bottom of the carbon block body (1) is provided with a connecting groove (2);
the upper and lower surfaces of the carbon block body (1) are respectively provided with a 1-2mm stemming layer (3);
the preparation method of the prebaked continuous independent reinforced carbon bowl anode carbon block structure comprises the following steps:
a. anode carbon block materials are adopted to respectively prepare a carbon block body (1), a prefabricated split carbon bowl filling block (9) and a connecting raised head (7);
b. respectively crushing and screening petroleum coke particles, carbon fibers and asphalt, mixing, stirring at constant temperature, and performing vibration molding or extrusion molding to obtain a matrix of the reinforced carbon bowl assembly (6);
c. roasting and cooling the matrix of the reinforced carbon bowl assembly (6) to obtain the reinforced carbon bowl assembly (6);
d. coating asphalt on the connecting part of the reinforced carbon bowl assembly (6), embedding the reinforced carbon bowl assembly into the connecting pit (10) of the carbon bowl assembly on the carbon block body (1), baking and cooling, and coating stemming on the upper and lower surfaces of the carbon block body (1) to form 1-2mm of mud bubble layers (3) on the upper and lower surfaces of the carbon block body (1) to obtain the independent reinforced carbon bowl anode carbon block;
according to the parts by weight, 80-85 parts of petroleum coke particles, 0.5-5 parts of carbon fiber and 14-18 parts of asphalt in the step b.
2. The method for preparing the prebaked continuous independent reinforced carbon bowl anode carbon block structure according to claim 1, wherein the method comprises the following steps: the length of the carbon fiber is 5-20 mm.
3. The method for preparing the prebaked continuous independent reinforced carbon bowl anode carbon block structure according to claim 1, wherein the method comprises the following steps: in the step c, the roasting temperature is 1100-1200 ℃, and the sintering time is 24-36 h.
4. The method for preparing the prebaked continuous independent reinforced carbon bowl anode carbon block structure according to claim 1, wherein the method comprises the following steps: in the step d, the roasting temperature is 700-800 ℃, and the roasting time is 2-4 h.
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