CN110106529A - A kind of aluminium electrolysis prebaked anode carbon block covers foil anti-oxidation method - Google Patents
A kind of aluminium electrolysis prebaked anode carbon block covers foil anti-oxidation method Download PDFInfo
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- CN110106529A CN110106529A CN201910562727.1A CN201910562727A CN110106529A CN 110106529 A CN110106529 A CN 110106529A CN 201910562727 A CN201910562727 A CN 201910562727A CN 110106529 A CN110106529 A CN 110106529A
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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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Abstract
The invention discloses a kind of aluminium electrolysis prebaked anode carbon blocks to cover foil anti-oxidation method.It is to be coated with anti oxidation layer on the surface of the metal foil or carbon cloth by using bonding agent to cover one layer of metal foil or carbon cloth on the surface of pre-baked anode carbon blocks.The present invention has the air exclusion for guaranteeing to flow in carbon block surface and electrolytic cell, and reaching reliably prevents, reduces carbon block surface oxidation, in high-temperature electrolysis environment, it can be used normally, dosage is small, and the influence to aluminum water quality is small, reaches environmental protection, energy conservation, the beneficial effect to lower consumption.
Description
Technical field
The present invention relates to a kind of aluminium electrolysis cell anode carbon block production method, especially a kind of aluminium electrolysis prebaked anode carbon block is covered
Foil anti-oxidation method.
Background technique
Existing aluminum electrolysis is all made of charcoal element prebaked anode production method and is produced, and is all made of powdery and the particle that disappears
The aluminium oxide of shape keeps the temperature mulch, carries out heat preservation covering, during electrolysis production, pre-baked anode carbon blocks are in high temperature shape always
The heat preservation mulch of state, powdery and fine granularity can not completely cut off air, and the carbon block surface of high temperature contacts with the air of flowing, causes
Pre-baked anode carbon blocks surface is largely oxidized, and the carbon material of loss is up to aluminium 25kg or more per ton.Also because of surface oxidation caused by
Peeling charcoal particle fall into electrolyte, will increase the generation of fluorine-containing dangerous waste " acute conjunctivitis breeze ", increase be about aluminium per ton 3~
8kg acute conjunctivitis breeze, the electric current that the increase of acute conjunctivitis breeze just will increase electrolytic cell waste, and increase electricity damage.
Although now there is the methods of burgy block surface spraying in the art, pre-baked anode carbon blocks are reduced in electrolytic cell for protecting
Inner surface oxidation, but there are following technical problems:
1, due to carbon block surface irregularity, porous crackle is caused to guarantee the effect for completely cutting off air, sprayed on material dosage
Greatly, palpus multilayer spraying, the thickness of coating is big, and existing cated thickness can reach 2-3mm, cause to bring the more of impurity into, influence
Aluminum water quality；
2, it is broken by peeling to be easy to happen thorough large area for the spraying protective layer to work in the high-temperature electrolysis environment up to 30 days
It is bad, while in this process, it due to the presence of carbon block hole crackle, will also result in the destruction of spray coating, destroy the nothing of coating
Method effectively realizes that reduce pre-baked anode carbon blocks aoxidizes in electrolytic cell inner surface；
3, the modes such as surface spraying do not obtain universal use in aluminium electroloysis industry so far because protection effect is poor.
In conclusion the prior art, there are sprayed on material dosage is big, the thickness of coating causes to bring the more of impurity into greatly, influence
Aluminum water quality is easy to happen thorough large area by pull out type fracture, due to depositing for carbon block hole crackle in high-temperature electrolysis environment
It will also result in the destruction of spray coating, protection effect is poor, does not obtain universal use, prebaked anode in aluminium electroloysis industry so far
It is Aluminium Industry technical problem urgently to be resolved that carbon block prevents or reduces surface oxidation on electrolytic cell.
Summary of the invention
The object of the present invention is to provide a kind of aluminium electrolysis prebaked anode carbon blocks to cover foil anti-oxidation method.The present invention has
Guarantee the air exclusion flowed in carbon block surface and electrolytic cell, reaching reliably prevents, reduces carbon block surface oxidation, in high-temperature electrolysis
It in environment, can be used normally, dosage is small, and the influence to aluminum water quality is small, the characteristics of reaching environmental protection, energy conservation, lower consumption.
Technical solution of the present invention: a kind of aluminium electrolysis prebaked anode carbon block covers foil anti-oxidation method, is by prebake sun
One layer of metal foil or carbon cloth are covered using bonding agent on the surface of pole carbon block, on the surface of the metal foil or carbon cloth
It is coated with anti oxidation layer.
Aluminium electrolysis prebaked anode carbon block above-mentioned is covered in foil anti-oxidation method, the bonding agent be tar, resin, pitch or
One of which in waterglass.
Aluminium electrolysis prebaked anode carbon block above-mentioned is covered in foil anti-oxidation method, and it is 0- that mass fraction is contained in the bonding agent
85% alumina powder.
Aluminium electrolysis prebaked anode carbon block above-mentioned is covered in foil anti-oxidation method, and it is 0- that mass fraction is contained in the bonding agent
70% alumina powder；Bonding agent play the role of by it is be bonded between metal foil and carbon block, fit closely, simultaneously because bonding agent
Resistance is big, can block electric current between carbon block and metal foil, prevents the electric current in carbon block from flowing through from the metal foil of low-resistivity, causes
Goldleaf scaling loss is oxidized, and loses the effect of air-isolation.
Aluminium electrolysis prebaked anode carbon block above-mentioned is covered in foil anti-oxidation method, and the fusing point of the metal foil is greater than 950 DEG C.
Aluminium electrolysis prebaked anode carbon block above-mentioned is covered in foil anti-oxidation method, the metal foil using copper, copper alloy, silver,
Gold, iron, one of material in steel or stainless steel.
Aluminium electrolysis prebaked anode carbon block above-mentioned is covered in foil anti-oxidation method, and the metal foil uses copper foil.
Aluminium electrolysis prebaked anode carbon block above-mentioned is covered in foil anti-oxidation method, and the material of the anti oxidation layer is waterglass.
Aluminium electrolysis prebaked anode carbon block above-mentioned is covered in foil anti-oxidation method, contains quality in the material of the anti oxidation layer
The one of which in alumina powder, fluorination sodium powder, aluminium fluoride powder or cryolite powder that score is 0-60%.
Aluminium electrolysis prebaked anode carbon block above-mentioned is covered in foil anti-oxidation method, contains quality in the material of the anti oxidation layer
Score is the alumina powder of 0-40%.
Compared with prior art, it has the advantages that
1, the present invention is that the metal foil of electrolyte temperature when being higher than aluminium cell work using fusing point carries out surface covering, makes carbon block
The air exclusion flowed in surface and electrolytic cell, reaches the mesh for preventing, reducing pre-baked anode carbon blocks surface oxidation；Because of aluminium electroloysis
For the electrolyte temperature that slot works normally generally at 920~950 DEG C, the metal foil material of covering will not only withstand 920~950 DEG C
High temperature, it is necessary to have high-temperature oxidation resistance, while reliably can completely cut off air, have the small feature of dosage, cover
Metal foil material is finally lost with the loss of pre-baked anode carbon blocks, and the metal foil material of consume all incorporates aluminum water, so this
The metal foil material of invention uses copper to be prepared as most preferably scheme for raw material, and the fusing point of copper is 1085 DEG C, anti-oxidant energy under high temperature
Power is strong, and large-scale industrial production, materials are convenient already for the copper foil that 6~9 μm of thickness；It is cheap, ton aluminum water consume copper only 10~
15 yuan；High financial profit, ton aluminum water reduce carbon material loss up to 25 ㎏, are worth about 100 yuan；Dosage aluminum water copper foil as low as per ton
Consumption can reach the degree ignored down to 100g~150g, the influence to aluminum water quality, copper alloy, silver, gold, iron, steel,
The materials such as stainless steel also can be used as available material of the invention.Metal foil air-isolation reliability is splendid, and reliability is spray
What coating can not be compared；And characteristic identical as copper foil for carbon cloth: conduction, high temperature resistant, corrosion-resistant, resistance to oxidation, carbon fiber
Cloth with a thickness of 0.1-0.3mm, carbon cloth is thin, with material is few, tensile strength is high, surface it is smooth it is fine and smooth be easy spraying formed it is anti-
Oxide layer, and anti oxidation layer has the characteristics that densification is reliable, thin, realizes that the impurity brought into is few, it is small to aluminum water qualitative effects, so
Carbon cloth can also be used in the present invention.
2, the bonding agent that metal foil and carbon block surface are smeared, fits closely copper foil with carbon block surface, and guarantee makes carbon block table
The air exclusion flowed in face and electrolytic cell, achievees the purpose that reliably to prevent, reduces carbon block surface oxidation；Because of the electric conductivity of copper
Can be excellent, resistivity is only 1.71 × 10-8Europe mother's rice, pre-baked anode carbon blocks resistivity are 5~7 × 10-4Europe mother's rice, electrolysis
Generally 4 volts of electrolytic cell pressure when slot works, anode carbon block pressure drop is about 140 millivolts, to prevent from being covered on the copper foil on carbon block surface
Because by super-high-current scaling loss, there is also identical problems for the materials such as copper alloy, silver, gold, so smearing or being sprayed on carbon block
Bonding agent between metal foil must meet following condition: (1) either under room temperature or high-temperature electrolysis environment, all having
Certain cementability, bonding force is enough to ensure that metal foil is attached and does not fall off in carbon block, and metal foil is made to keep lasting isolation
Air effect；(2) resistance is big, can block electric current between carbon block and metal foil, prevents gold of the electric current in carbon block from low-resistivity
Belong to foil to flow through, avoids goldleaf scaling loss or be oxidized；(3) material used in does not influence aluminum water quality or influences small；So this
Invention uses alumina powder and blended tars, alumina powder and resin compound, alumina powder and waterglass mixture, oxidation
The one of which of aluminium powder and asphalt mixture, as the bonding agent between carbon block and metal foil；The present invention can also be individually with coke
The one such bonding agent as between carbon block and metal foil of oil, resin, pitch, but at this time in metal foil both side surface all
Anti oxidation layer is sprayed, can also individually use waterglass as the bonding agent between carbon block and metal foil.Present invention spraying is smeared
The bonding agent in carbon block be responsible between bonded metal foil and carbon block it is be bonded, fit closely, can block between carbon block and metal foil
Electric current prevents the electric current in carbon block from flowing through from the metal foil of low-resistivity, with existing spray coating method be sprayed on carbon block only play every
The effect of the substance of exhausted air, purpose are entirely different.
3, because service life of the pre-baked anode carbon blocks on electrolytic cell is 30 days or so, metal foil is in high temperature for a long time
State loses the protective effect of the isolation air to carbon block in order to ensure the not oxidized destruction of metal foil, and the present invention uses water glass
Glass carries out spraying in metal foil surface and forms anti oxidation layer, improves the oxidation resistance of metal foil, and realization is unlinked in high-temperature electric
It, can reliable long-time normal use in border；Metal foil surface is smooth, and the waterglass anti oxidation layer of spraying is thin, and waterglass dosage is few
But even compact, protective performance is good and reliability is splendid；The waterglass anti oxidation layer of spraying is also insulating layer, has and blocks carbon block electricity
Flow through the effect conducted by copper foil.The anti-oxidant insulating layer of metal foil surface spraying of the present invention can also be with other substances such as: water
Glass and alumina powder mixture, waterglass and sodium fluoride powder mixture, waterglass and aluminium fluoride powder mixture, waterglass or ice
One of which in spar powder mixture, and the mixture also has can be reduced waterglass dosage, while in electrolytic process
In, it, can't because aluminium oxide, sodium fluoride, aluminum fluoride, ice crystal are all required materials during alumina eltrolysis
Aluminum water quality is polluted, and due to the smooth exquisiteness in the surface of metal foil or carbon cloth, the present invention is in metal foil or carbon cloth
The anti oxidation layer thickness of formation is sprayed on surface between 3 microns to 0.3 millimeter.
4, the present invention makes carbon block surface by using bonding agent to cover one layer of metal foil on the surface of pre-baked anode carbon blocks
Will not be contacted with the air of flowing, and spray anti oxidation layer in metal foil surface, enhance the inoxidizability of metal foil, prevent or
Carbon block is reduced in the surface oxidation of high-temperature electrolysis, not only can be reduced the unwanted losses of carbon material, moreover it is possible to reduce carbon block surface charcoal
The peeling of grain reduces the generation (the glimmering slag of acute conjunctivitis is danger wastes) of acute conjunctivitis breeze, and playing, which reduces electrolytic cell currents, wastes, and reaches
Environmental protection, energy conservation, consumption reduction purpose, and the thickness of bonding agent on anode carbon block surface, metal foil and anti oxidation layer is in 0.3-
0.8mm, the thickness of bonding agent, carbon cloth and anti oxidation layer on anode carbon block surface is in 0.5-1.0mm, with original spray coating method
Technology, which is compared, has material utilization amount small, the advantage that the influence to aluminum water quality is small, isolation air is reliable.
In conclusion the present invention has the air exclusion for guaranteeing to flow in carbon block surface and electrolytic cell, reach reliably prevent,
It reducing carbon block surface oxidation and also ensures that normal use in high-temperature electrolysis environment, dosage is small, and the influence to aluminum water quality is small,
Reach environmental protection, energy conservation, the beneficial effect to lower consumption.
Specific embodiment
Below with reference to embodiment, the present invention is further illustrated, but is not intended as the foundation limited the present invention.
Embodiment 1: a kind of aluminium electrolysis prebaked anode carbon block covers foil anti-oxidation method；Using tar as bonding agent, pre-
It roasts after covering one layer of carbon cloth using bonding agent on the surface of anode carbon block, using waterglass the two of carbon cloth before being bonded
Spraying forms anti oxidation layer on side surface.
Embodiment 2: a kind of aluminium electrolysis prebaked anode carbon block covers foil anti-oxidation method；Using resin as bonding agent, pre-
It roasts after covering one layer of carbon cloth using bonding agent on the surface of anode carbon block, is mixed before being bonded using waterglass and alumina powder
Object sprays in the both side surface of carbon cloth and forms anti oxidation layer, wherein anti oxidation layer: the quality of alumina powder in waterglass
Score is 20%.
Embodiment 3: a kind of aluminium electrolysis prebaked anode carbon block covers foil anti-oxidation method；Using pitch as bonding agent, pre-
It roasts after covering one layer of carbon cloth using bonding agent on the surface of anode carbon block, using waterglass and fluorination sodium powder mixing before being bonded
Object sprays in the both side surface of carbon cloth and forms anti oxidation layer, wherein anti oxidation layer: the quality of sodium powder is fluorinated in waterglass
Score is 40%.
Embodiment 4: a kind of aluminium electrolysis prebaked anode carbon block covers foil anti-oxidation method；Using waterglass as bonding agent,
It is mixed using waterglass and aluminium fluoride powder before being bonded after covering one layer of carbon cloth using bonding agent on the surface of pre-baked anode carbon blocks
Conjunction object sprays in the both side surface of carbon cloth forms anti oxidation layer, wherein anti oxidation layer: the matter of aluminium fluoride powder in waterglass
Measuring score is 60%.
Embodiment 5: a kind of aluminium electrolysis prebaked anode carbon block covers foil anti-oxidation method；Using tar as bonding agent, pre-
It roasts after covering one layer of carbon cloth using bonding agent on the surface of anode carbon block, is mixed before being bonded using waterglass and cryolite powder
Object sprays in the both side surface of carbon cloth and forms anti oxidation layer, wherein anti oxidation layer: the quality of cryolite powder in waterglass
Score is 20%.
Embodiment 6: a kind of aluminium electrolysis prebaked anode carbon block covers foil anti-oxidation method；Using tar and alumina powder mixture
As bonding agent, after covering one layer of carbon cloth using bonding agent on the surface of pre-baked anode carbon blocks, and using waterglass and
The spraying on the outer surface after carbon cloth bonding of alumina powder mixture forms anti oxidation layer, wherein bonding agent: oxygen in tar
The mass fraction for changing aluminium powder is 20%；Anti oxidation layer: the mass fraction of alumina powder is 10% in waterglass.
Embodiment 7: a kind of aluminium electrolysis prebaked anode carbon block covers foil anti-oxidation method；Using resin and alumina powder mixture
As bonding agent, after covering one layer of carbon cloth using bonding agent on the surface of pre-baked anode carbon blocks, and using waterglass and
The spraying on the outer surface after carbon cloth bonding of sodium fluoride powder mixture forms anti oxidation layer, wherein bonding agent: oxygen in resin
The mass fraction for changing aluminium powder is 40%；Anti oxidation layer: the mass fraction that sodium powder is fluorinated in waterglass is 60%.
Embodiment 8: a kind of aluminium electrolysis prebaked anode carbon block covers foil anti-oxidation method；Using pitch and alumina powder mixture
As bonding agent, after covering one layer of carbon cloth using bonding agent on the surface of pre-baked anode carbon blocks, and using waterglass and
The spraying on the outer surface after carbon cloth bonding of aluminium fluoride powder mixture forms anti oxidation layer, wherein bonding agent: oxygen in pitch
The mass fraction for changing aluminium powder is 60%；Anti oxidation layer: the mass fraction of aluminium fluoride powder is 50% in waterglass.
Embodiment 9: a kind of aluminium electrolysis prebaked anode carbon block covers foil anti-oxidation method；It is mixed using waterglass and alumina powder
Object is as bonding agent, after covering one layer of carbon cloth using bonding agent on the surface of pre-baked anode carbon blocks, and uses waterglass
Spraying forms anti oxidation layer on the outer surface after carbon cloth bonding with cryolite powder mixture, wherein bonding agent: waterglass
The mass fraction of middle alumina powder is 85%；Anti oxidation layer: the mass fraction of cryolite powder is 40% in waterglass.
Embodiment 10: a kind of aluminium electrolysis prebaked anode carbon block covers foil anti-oxidation method；It is mixed using tar and alumina powder
Object is as bonding agent, after covering one layer of carbon cloth using bonding agent on the surface of pre-baked anode carbon blocks, and uses waterglass
Spraying forms anti oxidation layer on the outer surface after carbon cloth bonding, wherein bonding agent: the quality of alumina powder point in tar
Number is 60%.
Embodiment 11: a kind of aluminium electrolysis prebaked anode carbon block covers foil anti-oxidation method；It is mixed using tar and alumina powder
Object is as bonding agent, and after covering one layer of copper foil using bonding agent on the surface of pre-baked anode carbon blocks, waterglass is used before bonding
It is sprayed in copper foil both side surface with alumina powder mixture and forms anti oxidation layer, wherein bonding agent: alumina powder in tar
Mass fraction is 20%；Anti oxidation layer: the mass fraction of alumina powder is 30% in waterglass.
Embodiment 12: a kind of aluminium electrolysis prebaked anode carbon block covers foil anti-oxidation method；It is mixed using resin and alumina powder
Object is as bonding agent, and after covering one layer of copper alloy foil using bonding agent on the surface of pre-baked anode carbon blocks, water is used before bonding
Glass and sodium fluoride powder mixture spray in copper alloy foil both side surface forms anti oxidation layer, wherein bonding agent: oxygen in resin
The mass fraction for changing aluminium powder is 50%；Anti oxidation layer: the mass fraction that sodium powder is fluorinated in waterglass is 60%.
Embodiment 13: a kind of aluminium electrolysis prebaked anode carbon block covers foil anti-oxidation method；It is mixed using waterglass and alumina powder
Object is closed as bonding agent, after covering one layer of copper foil using bonding agent on the surface of pre-baked anode carbon blocks, using waterglass in copper
Spraying forms anti oxidation layer on outer surface after foil bonding, wherein bonding agent: the mass fraction of alumina powder is in waterglass
75%。
Embodiment 14: a kind of aluminium electrolysis prebaked anode carbon block covers foil anti-oxidation method；It is mixed using tar and alumina powder
Object is as bonding agent, and after covering one layer of silver foil using bonding agent on the surface of pre-baked anode carbon blocks, waterglass is used before bonding
It is sprayed in silver foil both side surface with sodium fluoride powder mixture and forms anti oxidation layer, wherein bonding agent: alumina powder in tar
Mass fraction is 85%；Anti oxidation layer: the mass fraction that sodium powder is fluorinated in waterglass is 20%.
Embodiment 15: a kind of aluminium electrolysis prebaked anode carbon block covers foil anti-oxidation method；It is mixed using resin and alumina powder
Object is as bonding agent, after covering one layer of goldleaf using bonding agent on the surface of pre-baked anode carbon blocks, using waterglass in goldleaf
Spraying forms anti oxidation layer on outer surface after bonding, wherein bonding agent: the mass fraction of alumina powder is 45% in resin.
Embodiment 16: a kind of aluminium electrolysis prebaked anode carbon block covers foil anti-oxidation method；It is mixed using waterglass and alumina powder
Object is closed as bonding agent, after covering one layer of iron foil using bonding agent on the surface of pre-baked anode carbon blocks, uses water glass before being bonded
Glass and aluminium fluoride powder mixture spray in iron foil both side surface forms anti oxidation layer, wherein bonding agent: aluminium oxide in waterglass
The mass fraction of powder is 15%；Anti oxidation layer: the mass fraction of aluminium fluoride powder is 50% in waterglass.
Embodiment 17: a kind of aluminium electrolysis prebaked anode carbon block covers foil anti-oxidation method；It is mixed using resin and alumina powder
Object is as bonding agent, after covering one layer of steel foil using bonding agent on the surface of pre-baked anode carbon blocks, using waterglass and oxidation
Al powder mixt spraying on the outer surface after steel foil bonding forms anti oxidation layer, wherein bonding agent: alumina powder in resin
Mass fraction is 85%；Anti oxidation layer: the mass fraction of alumina powder is 55% in waterglass.
Embodiment 18: a kind of aluminium electrolysis prebaked anode carbon block covers foil anti-oxidation method；It is mixed using tar and alumina powder
Object is as bonding agent, and after covering one layer of copper alloy foil using bonding agent on the surface of pre-baked anode carbon blocks, water is used before bonding
Glass sprays in copper alloy foil both side surface and forms anti oxidation layer, wherein bonding agent: the mass fraction of alumina powder in tar
It is 25%.
Embodiment 19: a kind of aluminium electrolysis prebaked anode carbon block covers foil anti-oxidation method；It is mixed using waterglass and alumina powder
Object is closed as bonding agent, after covering one layer of stainless steel foil using bonding agent on the surface of pre-baked anode carbon blocks, using waterglass
Spraying forms anti oxidation layer on the outer surface after stainless steel foil bonding with sodium fluoride powder mixture, wherein bonding agent: waterglass
The mass fraction of middle alumina powder is 80%；Anti oxidation layer: the mass fraction that sodium powder is fluorinated in waterglass is 35%.
Embodiment 20: a kind of aluminium electrolysis prebaked anode carbon block covers foil anti-oxidation method；Using tar as bonding agent, pre-
It roasts after covering one layer of goldleaf using bonding agent on the surface of anode carbon block, is existed before being bonded using waterglass and sodium fluoride powder mixture
Spraying forms anti oxidation layer in goldleaf both side surface, wherein anti oxidation layer: the mass fraction that sodium powder is fluorinated in waterglass is 20%.
Embodiment 21: a kind of aluminium electrolysis prebaked anode carbon block covers foil anti-oxidation method；Using resin as bonding agent, pre-
It roasts after covering one layer of copper foil using bonding agent on the surface of anode carbon block, is existed before being bonded using waterglass and alumina powder mixture
Spraying forms anti oxidation layer in copper foil both side surface, wherein anti oxidation layer: the mass fraction of alumina powder is 40% in waterglass.
Embodiment 22: a kind of aluminium electrolysis prebaked anode carbon block covers foil anti-oxidation method；Using waterglass as bonding agent,
After covering one layer of copper alloy foil using bonding agent on the surface of pre-baked anode carbon blocks, using waterglass in copper alloy foil two before being bonded
Spraying forms anti oxidation layer on side surface.
Embodiment 23: a kind of aluminium electrolysis prebaked anode carbon block covers foil anti-oxidation method；Using pitch as bonding agent, pre-
It roasts after covering one layer of silver foil using bonding agent on the surface of anode carbon block, is existed before being bonded using waterglass and aluminium fluoride powder mixture
Spraying forms anti oxidation layer in silver foil both side surface, wherein anti oxidation layer: the mass fraction of aluminium fluoride powder is 60% in waterglass.
Embodiment 24: a kind of aluminium electrolysis prebaked anode carbon block covers foil anti-oxidation method；Using pitch as bonding agent, pre-
It roasts after covering one layer of iron foil using bonding agent on the surface of anode carbon block, is existed before being bonded using waterglass and sodium fluoride powder mixture
Spraying forms anti oxidation layer in the both side surface of iron foil, wherein anti oxidation layer: the mass fraction that sodium powder is fluorinated in waterglass is
50%。
Embodiment 25: a kind of aluminium electrolysis prebaked anode carbon block covers foil anti-oxidation method；Using waterglass as bonding agent,
After covering one layer of steel foil using bonding agent on the surface of pre-baked anode carbon blocks, waterglass and aluminium fluoride powder mixture are used before being bonded
Spraying forms anti oxidation layer in the both side surface of steel foil, wherein anti oxidation layer: the mass fraction of aluminium fluoride powder is in waterglass
40%。
Embodiment 26: a kind of aluminium electrolysis prebaked anode carbon block covers foil anti-oxidation method；Using tar as bonding agent, pre-
It roasts after covering one layer of stainless steel foil using bonding agent on the surface of anode carbon block, is mixed before being bonded using waterglass and cryolite powder
Object sprays in the both side surface of stainless steel foil and forms anti oxidation layer, wherein anti oxidation layer: the quality of cryolite powder in waterglass
Score is 60%.
Embodiment 27: a kind of aluminium electrolysis prebaked anode carbon block covers foil anti-oxidation method；It is mixed using waterglass and alumina powder
Object is closed as bonding agent, after covering one layer of steel foil using bonding agent on the surface of pre-baked anode carbon blocks, uses water glass before being bonded
Glass and aluminium fluoride powder mixture spray in steel foil both side surface forms anti oxidation layer, wherein bonding agent: aluminium oxide in waterglass
The mass fraction of powder is 75%；Anti oxidation layer: the mass fraction of aluminium fluoride powder is 45% in waterglass.
Embodiment 28: a kind of aluminium electrolysis prebaked anode carbon block covers foil anti-oxidation method；It is mixed using resin and alumina powder
Object is as bonding agent, after covering one layer of stainless steel foil using bonding agent on the surface of pre-baked anode carbon blocks, using waterglass and
The spraying on the outer surface after stainless steel foil bonding of alumina powder mixture forms anti oxidation layer, wherein bonding agent: oxygen in resin
The mass fraction for changing aluminium powder is 25%；Anti oxidation layer: the mass fraction of alumina powder is 60% in waterglass.
Embodiment 29: a kind of aluminium electrolysis prebaked anode carbon block covers foil anti-oxidation method；It is mixed using tar and alumina powder
Object is as bonding agent, and after covering one layer of iron foil using bonding agent on the surface of pre-baked anode carbon blocks, waterglass is used before bonding
Spraying forms anti oxidation layer in iron foil both side surface, wherein bonding agent: the mass fraction of alumina powder is 85% in tar.
Embodiment 30: a kind of aluminium electrolysis prebaked anode carbon block covers foil anti-oxidation method；It is mixed using waterglass and alumina powder
Object is closed as bonding agent, after covering one layer of copper foil using bonding agent on the surface of pre-baked anode carbon blocks, using waterglass and fluorine
Change the spraying on the outer surface after copper foil bonding of sodium powder mixture and form anti oxidation layer, wherein bonding agent: aluminium oxide in waterglass
The mass fraction of powder is 85%；Anti oxidation layer: the mass fraction that sodium powder is fluorinated in waterglass is 60%.
Claims (10)
1. a kind of aluminium electrolysis prebaked anode carbon block covers foil anti-oxidation method, it is characterised in that: be by pre-baked anode carbon blocks
One layer of metal foil or carbon cloth are covered using bonding agent on surface, are coated on the surface of the metal foil or carbon cloth
Anti oxidation layer.
2. aluminium electrolysis prebaked anode carbon block according to claim 1 covers foil anti-oxidation method, it is characterised in that: the bonding
Agent is the one of which in tar, resin, pitch or waterglass.
3. aluminium electrolysis prebaked anode carbon block according to claim 2 covers foil anti-oxidation method, it is characterised in that: the bonding
The alumina powder for being 0-85% containing mass fraction in agent.
4. aluminium electrolysis prebaked anode carbon block according to claim 3 covers foil anti-oxidation method, it is characterised in that: the bonding
The alumina powder for being 0-70% containing mass fraction in agent.
5. aluminium electrolysis prebaked anode carbon block according to claim 1 covers foil anti-oxidation method, it is characterised in that: the metal
The fusing point of foil is greater than 950 DEG C.
6. aluminium electrolysis prebaked anode carbon block according to claim 5 covers foil anti-oxidation method, it is characterised in that: the metal
Foil is using one of material in copper, copper alloy, silver, gold, iron, steel or stainless steel.
7. aluminium electrolysis prebaked anode carbon block according to claim 6 covers foil anti-oxidation method, it is characterised in that: the metal
Foil uses copper foil.
8. aluminium electrolysis prebaked anode carbon block according to claim 1 covers foil anti-oxidation method, it is characterised in that: the antioxygen
The material for changing layer is waterglass.
9. aluminium electrolysis prebaked anode carbon block according to claim 8 covers foil anti-oxidation method, it is characterised in that: the antioxygen
Change in the material of layer containing in alumina powder that mass fraction is 0-60%, fluorination sodium powder, aluminium fluoride powder or cryolite powder wherein
It is a kind of.
10. aluminium electrolysis prebaked anode carbon block according to claim 9 covers foil anti-oxidation method, it is characterised in that: described anti-
The alumina powder for being 0-40% containing mass fraction in the material of oxide layer.
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201910562727.1A CN110106529B (en) | 2019-06-26 | 2019-06-26 | Aluminum electrolysis prebaked anode carbon block foil-covering anti-oxidation method |
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| CN201910562727.1A CN110106529B (en) | 2019-06-26 | 2019-06-26 | Aluminum electrolysis prebaked anode carbon block foil-covering anti-oxidation method |
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| CN111659989A (en) * | 2020-05-25 | 2020-09-15 | 中山大学 | Method for preparing titanium steel composite plate through cladding |
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