CN101250724A - Method for producing one-dipping two-baking anode carbon block - Google Patents
Method for producing one-dipping two-baking anode carbon block Download PDFInfo
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- CN101250724A CN101250724A CNA2007101805597A CN200710180559A CN101250724A CN 101250724 A CN101250724 A CN 101250724A CN A2007101805597 A CNA2007101805597 A CN A2007101805597A CN 200710180559 A CN200710180559 A CN 200710180559A CN 101250724 A CN101250724 A CN 101250724A
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Abstract
The invention discloses a method for producing one impregnating two calcining anode carbon blocks, which is on the basis of producing common anode carbon blocks and comprises following steps: selectively using calcined coke, adding a little antioxidant additive, preheating a common anode under the temperature of 280-330DEG C for 18-24 hours, then, hoisting in a high pressure impregnation tank, filling impregnating pitch whose temperature is 160-180DEG C under the vacuum pressure of 0.09-0.094MPa, pressurizing 1.55-1.6MPa, maintaining the pressure for 3-5 hours, hoisting out and cooling to normal temperature, then, calcining for 200-220 hours under the temperature condition that the maximum temperature is 800-900DEG C according to a heating curve, cooling, and then cleaning up to obtain a new one impregnating two calcining anode carbon block. Since the pitch is filled in an air vent of the anode, the mechanicalness and the physical and chemical properties of the anode carbon blocks are newly changed, the bulk density and the compressive strength are increased, the porosity is lowered, the resistivity is lowered, the activity of the binder coke and the activity of aggregate tend to be consistent, the speed of selective oxidation is lowered, the voltage drop of the anode carbon blocks is lowered, and the using period of the anode is prolonged.
Description
Technical field:
The present invention relates to a kind of production method of anode carbon block, especially relate to a kind of production method of an one-dipping two-baking anode carbon block, and the behavior in aluminium cell.
Background technology:
At present used for aluminium electrolysis pre-baked anode carbon blocks resistivity is generally between 55～65 μ Ω .m, life cycle about 28 days, pre-baked anode carbon blocks oxidation in use, fall slag, seminess is more serious.Breeze is many and then reduced the life cycle of pre-baked anode carbon blocks in the electrolyzer, and labor strength increases; The electrolytic resistance rate raises, the ionogen heating, and fluoride salt volatilizees and drags for the ionogen that breeze is taken away, and causes fluoride salt consumption to increase considerably, the plant operations worsening condition, environmental pollution is serious.
Summary of the invention:
Technical problem to be solved by this invention is: overcome the deficiencies in the prior art, the production method of one a sharp one-dipping two-baking anode carbon block is provided, thereby can effectively reduce the resistivity of pre-baked anode carbon blocks, improve the antioxidant property of pre-baked anode carbon blocks, prolong the life cycle of anode carbon block in electrolyzer, reduce the oxidation slag that comes off, reduce ton aluminium charcoal power consumption consumption, reduce labor strength, reduce environmental pollution.
The technical scheme that the present invention is taked for the technical solution problem is:
A kind of production method of an one-dipping two-baking anode carbon block comprises the production method of common anode charcoal piece, and its concrete steps are:
A. retard petroleum coke is broken into the granularity smaller or equal to 40mm, secluding air was calcined under 1250～1300 ℃ temperature condition 40～48 hours, got rid of the volatilization composition, made material contracts form carbonaceous starting material, i.e. after-smithing petroleum coke A;
B. with broken among the after-smithing petroleum coke A, screening is the part abrasive dust also, and the after-smithing petroleum coke B that gets various granularities is standby;
C. coal-tar pitch is dissolved under 150～180 ℃ temperature condition fully, must dissolve pitch C, stand for standby use;
D. will dissolve pitch C and join after the preheating among the after-smithing petroleum coke B, and mix under 140～160 ℃ temperature condition and pinch even one-tenth thickener D, wherein, the add-on of dissolving pitch C is 15～17% of an after-smithing petroleum coke B weight part;
E. mix and pinch uniform thickener D vibratory compaction in different moulds, make the anode green compact of all size;
F. the anode green compact are placed stoving oven, secluding air according to the roasting 300～360 hours under 1100～1250 ℃ temperature condition of roasting first time heating curve top temperature, is reduced to the normal temperature cleaning of coming out of the stove after burning till, become used for aluminium electrolysis common anode charcoal piece;
G. add a small amount of antioxidant additive when producing common anode charcoal piece, generate common anode behind shaping and roasting, common anode preheating 18～24 hours under 280～330 ℃ temperature condition makes anode carbon block temperature unanimity from the inside to surface;
H. preheating common anode charcoal piece is hung in the high-pressure impregnation jar, vacuumize after airtight, vacuum pressure is that to charge into temperature under the situation of 0.09～0.094mPa be 160～180 ℃ of impregnating pitches, and pressurization 1.55～1.6mPa and pressurize 3～5 hours make pitch completely filled anode carbon block ventilate;
I. will hang out through the anode carbon block that high-pressure impregnation is crossed and carry out the roasting second time after being cooled to normal temperature, according to the roasting 200～220 hours under 800～900 ℃ temperature condition of heating curve top temperature, make anode carbon block mechanical property and physicochemical property that new variation arranged;
J. will obtain a new one-dipping two-baking anode carbon block through the anode carbon block cooling back cleaning of re-baking.
In the described step " b ", the granularity of after-smithing petroleum coke B is: 3～6mm granularity account for 16 ± 3%, 1～3mm granularity account for 18 ± 3% ,-0.074mm granularity account for 25 ± 3%.
In the described step " f ", the heating curve of roasting for the first time is divided into: the anode preheating stage also is a softening stress-displacement stage: roasting is 50 hours under 0～300 ℃ the temperature condition; The fugitive constituent volatilization discharge stage: roasting is 130 hours under 300～600 ℃ the temperature condition; The pitch sintering coking stage: roasting is 60 hours under 600～900 ℃ the temperature condition; The constant temperature holding stage: roasting is 35 hours under 900～1250 ℃ the temperature condition, constant temperature 15 hours.
In the described step " g ", the add-on of antioxidant additive is 1.5～2.5% of a common anode charcoal piece weight.
Described antioxidant additive is a synthetic graphite.
In the described step " h ", behind the adding impregnating pitch liquid, pitch completely filled anode carbon block ventilate once increases weight 16～17%.
In the described step " i ", the heating curve of roasting for the second time is divided into: the anode preheating stage also is a softening stress-displacement stage: roasting is 40 hours under 0～250 ℃ the temperature condition; The fugitive constituent volatilization discharge stage: roasting is 80 hours under 250～650 ℃ the temperature condition; The pitch sintering coking stage: roasting is 40 hours under 650～900 ℃ the temperature condition; The constant temperature holding stage: constant temperature is 20～40 hours under 900 ℃ the temperature condition.
In the described step " h ", the physical and chemical index of described impregnating pitch is: ash content≤0.2%, moisture≤5%, fugitive constituent 60～65%, 80～90 ℃ of softening temperatures, toluene insolubles 23～25%, quinoline insolubles≤3%, β-resin 14～18%, coking value 50～55%, density 〉=1.2g/cm
3
Positive beneficial effect of the present invention is:
1. the production method of an one-dipping two-baking anode carbon block of the present invention, be on the basis of common anode charcoal piece production technique, it is burnt that the back is forged in selection, coal-tar pitch and antioxidant addn, broken screening abrasive dust in the warp is joined the pitch kneading and compacting then, and the bakes to burn the article product re-uses the high-pressure impregnation technology in superpower or the ultra-high power graphite electrode technology, common prebaked anode is carried out the high-pressure impregnation art breading, steeping process at first antianode carries out preheating, is heated to 280～330 ℃, from outside to inside the temperature unanimity, the high-pressure impregnation jar of packing into, product is vacuumized, and vacuum tightness 0.09～0.094MPa discharges the gas in the anode pore, become vacuum state, charge into the dipping special asphalt, ventilate directly sucks impregnating pitch under vacuum action, 1.55～1.6mPa then pressurizes, force to inject and pressurize 3～5 hours, guaranteeing under high pressure the anodic pore entirely by the pitch abundance, after return oil, hang out cooling, carry out re-baking again, stain pitch is sintered to fixed carbon, form the close one-dipping two-baking anode of matter.
An one-dipping two-baking anode carbon block of the present invention and common anode charcoal piece physical and chemical index contrast table
| Analysis project | Unit | General anode | One one-dipping two-baking anode |
| Ash content | ％ | 0.42 | 0.35 |
| Volume density | g/cm 3 | 1.52～1.55 | 1.65～1.75 |
| Resistivity | μΩ.m | 55～58 | 39～43 |
| Ultimate compression strength | Mpa | 30～32 | 38～45 |
| True density | g/cm 3 | 2.02～2.04 | 2.06～2.10 |
| Air | npm | 5.6 | 3.1 |
| CO 2React residual | ％ | 83.1 | 94 |
| Dust | ％ | 3.56 | 2.54 |
| Loss | ％ | 16.34 | 3.46 |
| Air reaction is residual | ％ | 89.7 | 98.5 |
| Dust | ％ | 1.5 | 0.2 |
| Loss | ％ | 10 | 1.2 |
| Void content | ％ | 24～26 | 16～18 |
As can be seen from the above table: the present invention produce the every physical and chemical index of an one-dipping two-baking anode carbon block all be better than common pre-baked anode carbon blocks, about being apparent that most that resistivity is than the low 15 μ Ω .m of common anode, air reaction is residual high by 8.8% than common anode, it is residual high by 10.9% that CO2 reacts, void content is low by 8%, the high 0.15-0.2g/cm of volume density
3, air has reduced 2.5nPm.The higher volume density of one one-dipping two-baking anode carbon block reaches unanimity the activity of binder coke and aggregate, thereby has reduced the speed of selective oxidation, has reduced the volts lost of anode carbon block, has prolonged the anode life cycle.
2. the anode carbon block produced of production method of the present invention, its volts lost can reduce 52mv, the ton aluminium 166kWh/t-Al that can economize on electricity; Life cycle prolongs 12 days than common anode charcoal piece, promptly anode carbon block more anode change cycle be 41 days, the change poles coefficient is reduced to 0.34/groove day by original 0.5/groove day, work change poles workload reduces by 32%; Working stability in the experiment electrolyzer, one-dipping two-baking anode carbon block conduction are evenly, and be anti-oxidant and thermal shocking is strong, falls slag, to fall the piece loss less, and anode carbon block only need consume 398kg/t-Al; Reduce the service wear of equipment such as the turnover loss of anode carbon block steel pawl, aluminium guide bar and aluminum steel blast piece and overhead traveling crane, produced certain effect to reducing production costs; Production process need not special openings and drags for the carbon slag; workman's labor capacity reduces; the cover plate opening time is reduced to 34 fens groove days by original 50 minutes/groove day; help improving gas collecting efficiency and gas cleaning; help the recovery of environment protection and volatilization fluoride salt; meet the social desirability of current electrolysis of aluminum producer energy-saving and emission-reduction, certain economic benefits and social benefit are arranged.
3. the production method of the present invention's one one-dipping two-baking anode carbon block and the one-dipping two-baking anode carbon block produced with this method; be applicable to sodium aluminum fluoride-alumina molten salt electrolysis of aluminum enterprise; to the aluminium electrolysis enterprise energy-saving and emission-reduction; reduce workman's labor capacity; operation hourss such as reduction overhead traveling crane, crust breaking machine reach and play important effect with environment protection, and very important economic results in society are arranged.
Embodiment:
Embodiment 1: a kind of production method of an one-dipping two-baking anode carbon block, comprise the production method of common anode charcoal piece, and its concrete steps are:
A. retard petroleum coke is broken into the granularity smaller or equal to 40mm, behind the secluding air, calcining is 48 hours under 1250 ℃ temperature condition, gets rid of the volatilization composition, makes material contracts form carbonaceous starting material, i.e. after-smithing petroleum coke A;
B. with broken among the after-smithing petroleum coke A, screening is the part abrasive dust also, and the after-smithing petroleum coke B that gets various granularities is standby;
C. coal-tar pitch is dissolved under 180 ℃ temperature condition fully, must dissolve pitch C, stand for standby use;
D. will dissolve pitch C and join after the preheating among the after-smithing petroleum coke B, and mix under 140 ℃ temperature condition and pinch even one-tenth thickener D, wherein, the add-on of dissolving pitch C is 15% of an after-smithing petroleum coke B weight part;
E. mix and pinch uniform thickener D vibratory compaction in different moulds, make the anode green compact of all size;
F. the anode green compact are placed stoving oven, secluding air according to roasting first time heating curve top temperature roasting time 360 hours under 1100 ℃ temperature condition, is reduced to the normal temperature cleaning of coming out of the stove after burning till, become used for aluminium electrolysis common anode charcoal piece;
G. add a small amount of antioxidant additive when producing common anode charcoal piece, generate common anode behind shaping and roasting, common anode preheating 24 hours under 280 ℃ temperature condition makes anode carbon block temperature unanimity from the inside to surface;
H. preheating common anode charcoal piece is hung in the high-pressure impregnation jar, vacuumize after airtight, vacuum pressure is that to charge into temperature under the situation of 0.09～0.094mPa be 160 ℃ of impregnating pitches, and pressurization 1.55mPa and pressurize 5 hours make pitch completely filled anode carbon block ventilate;
I. will hang out through the anode carbon block that high-pressure impregnation is crossed and carry out the roasting second time after being cooled to normal temperature, and, make anode carbon block mechanical property and physicochemical property that new variation arranged according to the roasting 200 hours under 800 ℃ temperature condition of heating curve top temperature;
J. will obtain a new one-dipping two-baking anode carbon block through the anode carbon block cooling back cleaning of re-baking.
In the described step " b ", the granularity of after-smithing petroleum coke B is: 3～6mm granularity account for 16 ± 3%, 1～3mm granularity account for 18 ± 3% ,-0.074mm granularity account for 25 ± 3%.
In the described step " f ", the heating curve of roasting for the first time is divided into: the anode preheating stage also is a softening stress-displacement stage: roasting is 50 hours under 0～300 ℃ the temperature condition; The fugitive constituent volatilization discharge stage: roasting is 130 hours under 300～600 ℃ the temperature condition; The pitch sintering coking stage: roasting is 60 hours under 600～900 ℃ the temperature condition; The constant temperature holding stage: roasting is 35 hours under 900～1250 ℃ the temperature condition, constant temperature 15 hours.
In the described step " g ", the add-on of antioxidant additive synthetic graphite is 1.5% of a common anode charcoal piece weight.
In the described step " h ", behind the adding impregnating pitch liquid, pitch completely filled anode carbon block ventilate once increases weight 16%.
In the described step " i ", the heating curve of roasting for the second time is divided into: the anode preheating stage also is a softening stress-displacement stage: roasting is 40 hours under 0～250 ℃ the temperature condition; The fugitive constituent volatilization discharge stage: roasting is 80 hours under 250～650 ℃ the temperature condition; The pitch sintering coking stage: roasting is 40 hours under 650～900 ℃ the temperature condition; The constant temperature holding stage: constant temperature is 20 hours under 900 ℃ the temperature condition.
In the described step " h ", the physical and chemical index of described impregnating pitch is: ash content≤0.2%, moisture≤5%, fugitive constituent 60%, 80 ℃ of softening temperatures, toluene insolubles 23%, quinoline insolubles≤3%, β-resin 14%, coking value 50%, density 〉=1.2g/cm
3
Embodiment 2: a kind of production method of an one-dipping two-baking anode carbon block, comprise the production method of common anode charcoal piece, and its concrete steps are:
A. retard petroleum coke is broken into the granularity smaller or equal to 40mm, behind the secluding air, calcining is 40 hours under 1300 ℃ temperature condition, gets rid of the volatilization composition, makes material contracts form carbonaceous starting material, i.e. after-smithing petroleum coke A;
B. with broken among the after-smithing petroleum coke A, screening is the part abrasive dust also, and the after-smithing petroleum coke B that gets various granularities is standby;
C. coal-tar pitch is dissolved under 150 ℃ temperature condition fully, must dissolve pitch C, stand for standby use;
D. will dissolve pitch C and join after the preheating among the after-smithing petroleum coke B, and mix under 160 ℃ temperature condition and pinch even one-tenth thickener D, wherein, the add-on of dissolving pitch C is 18% of an after-smithing petroleum coke B weight part;
E. mix and pinch uniform thickener D vibratory compaction in different moulds, make the anode green compact of all size;
F. the anode green compact are placed stoving oven, secluding air according to roasting first time heating curve top temperature roasting time 300 hours under 1250 ℃ temperature condition, is reduced to the normal temperature cleaning of coming out of the stove after burning till, become used for aluminium electrolysis common anode charcoal piece;
G. add a small amount of antioxidant additive when producing common anode charcoal piece, generate common anode behind shaping and roasting, common anode preheating 24 hours under 280 ℃ temperature condition makes anode carbon block temperature unanimity from the inside to surface;
H. preheating common anode charcoal piece is hung in the high-pressure impregnation jar, vacuumize after airtight, vacuum pressure is that to charge into temperature under the situation of 0.09～0.094mPa be 180 ℃ of impregnating pitches, and pressurization 1.55～1.6mPa and pressurize 3 hours make pitch completely filled anode carbon block ventilate;
I. will hang out through the anode carbon block that high-pressure impregnation is crossed and carry out the roasting second time after being cooled to normal temperature, and, make anode carbon block mechanical property and physicochemical property that new variation arranged according to the roasting 220 hours under 900 ℃ temperature condition of heating curve top temperature;
J. will obtain a new one-dipping two-baking anode carbon block through the anode carbon block cooling back cleaning of re-baking.
In the described step " b ", the granularity of after-smithing petroleum coke B is: 3～6mm granularity account for 16 ± 3%, 1～3mm granularity account for 18 ± 3% ,-0.074mm granularity account for 25 ± 3%.
In the described step " f ", the heating curve of roasting for the first time is divided into: the anode preheating stage also is a softening stress-displacement stage: roasting is 50 hours under 0～300 ℃ the temperature condition; The fugitive constituent volatilization discharge stage: roasting is 130 hours under 300～600 ℃ the temperature condition; The pitch sintering coking stage: roasting is 60 hours under 600～900 ℃ the temperature condition; The constant temperature holding stage: roasting is 35 hours under 900～1250 ℃ the temperature condition, constant temperature 15 hours.
In the described step " g ", the add-on of antioxidant additive synthetic graphite is 2.5% of a common anode charcoal piece weight.
In the described step " h ", behind the adding impregnating pitch liquid, pitch completely filled anode carbon block ventilate once increases weight 17%.
In the described step " i ", the heating curve of roasting for the second time is divided into: the anode preheating stage also is a softening stress-displacement stage: roasting is 40 hours under 0～250 ℃ the temperature condition; The fugitive constituent volatilization discharge stage: roasting is 80 hours under 250～650 ℃ the temperature condition; The pitch sintering coking stage: roasting is 40 hours under 650～900 ℃ the temperature condition; The constant temperature holding stage: constant temperature is 40 hours under 900 ℃ the temperature condition.
In the described step " h ", the physical and chemical index of described impregnating pitch is: ash content≤0.2%, moisture≤5%, fugitive constituent 65%, 90 ℃ of softening temperatures, toluene insolubles 25%, quinoline insolubles≤3%, β-resin 18%, coking value 55%, density 〉=1.3g/cm
3
Embodiment 3: a kind of production method of an one-dipping two-baking anode carbon block, comprise the production method of common anode charcoal piece, and its concrete steps are:
A. retard petroleum coke is broken into the granularity smaller or equal to 40mm, behind the secluding air, calcining is 45 hours under 1300 ℃ temperature condition, gets rid of the volatilization composition, makes material contracts form carbonaceous starting material, i.e. after-smithing petroleum coke A;
B. with broken among the after-smithing petroleum coke A, screening is the part abrasive dust also, and the after-smithing petroleum coke B that gets various granularities is standby;
C. coal-tar pitch is dissolved under 160 ℃ temperature condition fully, must dissolve pitch C, stand for standby use;
D. will dissolve pitch C and join after the preheating among the after-smithing petroleum coke B, and mix under 150 ℃ temperature condition and pinch even one-tenth thickener D, wherein, the add-on of dissolving pitch C is 16% of an after-smithing petroleum coke B weight part;
E. mix and pinch uniform thickener D vibratory compaction in different moulds, make the anode green compact of all size;
F. the anode green compact are placed stoving oven, secluding air according to roasting first time heating curve top temperature roasting time 330 hours under 1200 ℃ temperature condition, is reduced to the normal temperature cleaning of coming out of the stove after burning till, become used for aluminium electrolysis common anode charcoal piece;
G. add a small amount of antioxidant additive when producing common anode charcoal piece, generate common anode behind shaping and roasting, common anode preheating 20 hours under 300 ℃ temperature condition makes anode carbon block temperature unanimity from the inside to surface;
H. preheating common anode charcoal piece is hung in the high-pressure impregnation jar, vacuumize after airtight, vacuum pressure is that to charge into temperature under the situation of 0.09～0.094mPa be 170 ℃ impregnating pitch, and pressurization 1.55～1.6mPa and pressurize 4 hours make pitch completely filled anode carbon block ventilate;
I. will hang out through the anode carbon block that high-pressure impregnation is crossed and carry out the roasting second time after being cooled to normal temperature, and, make anode carbon block mechanical property and physicochemical property that new variation arranged according to the roasting 210 hours under 900 ℃ temperature condition of heating curve top temperature;
J. will obtain a new one-dipping two-baking anode carbon block through the anode carbon block cooling back cleaning of re-baking.
In the described step " b ", the granularity of after-smithing petroleum coke B is: 3～6mm granularity account for 16 ± 3%, 1～3mm granularity account for 18 ± 3% ,-0.074mm granularity account for 25 ± 3%.
In the described step " f ", the heating curve of roasting for the first time is divided into: the anode preheating stage also is a softening stress-displacement stage: roasting is 50 hours under 0～300 ℃ the temperature condition; The fugitive constituent volatilization discharge stage: roasting is 130 hours under 300～600 ℃ the temperature condition; The pitch sintering coking stage: roasting is 60 hours under 600～900 ℃ the temperature condition; The constant temperature holding stage: roasting is 35 hours under 900～1250 ℃ the temperature condition, constant temperature 15 hours.
In the described step " g ", the add-on of antioxidant additive synthetic graphite is 2.0% of a common anode charcoal piece weight.
In the described step " h ", behind the adding impregnating pitch liquid, pitch completely filled anode carbon block ventilate once increases weight 16%.
In the described step " i ", the heating curve of roasting for the second time is divided into: the anode preheating stage also is a softening stress-displacement stage: roasting is 40 hours under 0～250 ℃ the temperature condition; The fugitive constituent volatilization discharge stage: roasting is 80 hours under 250～650 ℃ the temperature condition; The pitch sintering coking stage: roasting is 40 hours under 650～900 ℃ the temperature condition; The constant temperature holding stage: constant temperature is 30 hours under 900 ℃ the temperature condition.
In the described step " h ", the physical and chemical index of described impregnating pitch is: ash content≤0.2%, moisture≤5%, fugitive constituent 65%, 85 ℃ of softening temperatures, toluene insolubles 24%, quinoline insolubles≤3%, β-resin 16%, coking value 52%, density 〉=1.4g/cm
3
Claims (8)
1. the production method of an one-dipping two-baking anode carbon block comprises the production method of common anode charcoal piece, and its concrete steps are:
A. retard petroleum coke is broken into the granularity smaller or equal to 40mm, secluding air was calcined under 1250～1300 ℃ temperature condition 40～48 hours, got rid of the volatilization composition, made material contracts form carbonaceous starting material, i.e. after-smithing petroleum coke A;
B. with broken among the after-smithing petroleum coke A, screening is the part abrasive dust also, and the after-smithing petroleum coke B that gets various granularities is standby;
C. coal-tar pitch is dissolved under 150～180 ℃ temperature condition fully, must dissolve pitch C, stand for standby use;
D. will dissolve pitch C and join after the preheating among the after-smithing petroleum coke B, and mix under 140～160 ℃ temperature condition and pinch even one-tenth thickener D, wherein, the add-on of dissolving pitch C is 15～17% of an after-smithing petroleum coke B weight part;
E. mix and pinch uniform thickener D vibratory compaction in different moulds, make the anode green compact of all size;
F. the anode green compact are placed stoving oven, secluding air according to the roasting 300～360 hours under 1100～1250 ℃ temperature condition of roasting first time heating curve top temperature, is reduced to the normal temperature cleaning of coming out of the stove after burning till, become used for aluminium electrolysis common anode charcoal piece;
G. add a small amount of antioxidant additive when producing common anode charcoal piece, generate common anode behind shaping and roasting, common anode preheating 18～24 hours under 280～330 ℃ temperature condition makes anode carbon block temperature unanimity from the inside to surface;
H. preheating common anode charcoal piece is hung in the high-pressure impregnation jar, vacuumize after airtight, vacuum pressure is that to charge into temperature under the situation of 0.09～0.094mPa be 160～180 ℃ of impregnating pitches, and pressurization 1.55～1.6mPa and pressurize 3～5 hours make pitch completely filled anode carbon block ventilate;
I. will hang out through the anode carbon block that high-pressure impregnation is crossed and carry out the roasting second time after being cooled to normal temperature, according to the roasting 200～220 hours under 800～900 ℃ temperature condition of heating curve top temperature, make anode carbon block mechanical property and physicochemical property that new variation arranged;
J. will obtain a new one-dipping two-baking anode carbon block through the anode carbon block cooling back cleaning of re-baking.
2. the production method of an one-dipping two-baking anode carbon block according to claim 1, it is characterized in that: in the described step " b ", the granularity of after-smithing petroleum coke B is: 3～6mm granularity account for 16 ± 3%, 1～3mm granularity account for 18 ± 3% ,-0.074mm granularity account for 25 ± 3%.
3. the production method of an one-dipping two-baking anode carbon block according to claim 1, it is characterized in that: in the described step " f ", the heating curve of roasting for the first time is divided into: the anode preheating stage also is a softening stress-displacement stage: roasting is 50 hours under 0～300 ℃ the temperature condition; The fugitive constituent volatilization discharge stage: roasting is 130 hours under 300～600 ℃ the temperature condition; The pitch sintering coking stage: roasting is 60 hours under 600～900 ℃ the temperature condition; The constant temperature holding stage: roasting is 35 hours under 900～1250 ℃ the temperature condition, constant temperature 15 hours.
4. the production method of an one-dipping two-baking anode carbon block according to claim 1 is characterized in that: in the described step " g ", the add-on of antioxidant additive is 1.5～2.5% of a common anode charcoal piece weight.
5. the production method of an one-dipping two-baking anode carbon block according to claim 4 is characterized in that: described antioxidant additive is a synthetic graphite.
6. the production method of an one-dipping two-baking anode carbon block according to claim 1 is characterized in that: in the described step " h ", behind the adding impregnating pitch liquid, pitch completely filled anode carbon block ventilate once increases weight 16～17%.
7. the production method of an one-dipping two-baking anode carbon block according to claim 1, it is characterized in that: in the described step " i ", the heating curve of roasting for the second time is divided into: the anode preheating stage also is a softening stress-displacement stage: roasting is 40 hours under 0～250 ℃ the temperature condition; The fugitive constituent volatilization discharge stage: roasting is 80 hours under 250～650 ℃ the temperature condition; The pitch sintering coking stage: roasting is 40 hours under 650～900 ℃ the temperature condition; The constant temperature holding stage: constant temperature is 20～40 hours under 900 ℃ the temperature condition.
8. the production method of an one-dipping two-baking anode carbon block according to claim 1, it is characterized in that: in the described step " h ", the physical and chemical index of described impregnating pitch is: ash content≤0.2%, moisture≤5%, fugitive constituent 60～65%, 80～90 ℃ of softening temperatures, toluene insolubles 23～25%, quinoline insolubles≤3%, β-resin 14～18%, coking value 50～55%, density 〉=1.2g/cm
3
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| CN100580146C CN100580146C (en) | 2010-01-13 |
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| CN200710180559A Expired - Fee Related CN100580146C (en) | 2007-11-28 | 2007-11-28 | Method for producing one-dipping two-baking anode carbon block |
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Cited By (18)
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|---|---|---|---|---|
| CN102249237A (en) * | 2010-12-20 | 2011-11-23 | 龚炳生 | Graphite crucible |
| CN102557671A (en) * | 2011-12-02 | 2012-07-11 | 贵州师范大学 | Petroleum coke preprocessing method for preparing prebaked carbon anode |
| CN101993246B (en) * | 2009-08-27 | 2013-02-20 | 河南方圆炭素集团有限公司 | Thermal conductive graphite blocks for blast-furnace bottom and hearth |
| CN103030401A (en) * | 2012-12-17 | 2013-04-10 | 山东平阴丰源炭素有限责任公司 | Production method of low-air-permeability prebaked anode |
| CN103741168A (en) * | 2013-12-27 | 2014-04-23 | 中国神华能源股份有限公司 | Method for preparing prebaked anode used in aluminum production by using anthracite |
| CN104031669A (en) * | 2013-03-07 | 2014-09-10 | 神华集团有限责任公司 | Electrode pitch and preparation method thereof |
| CN104627981A (en) * | 2015-02-13 | 2015-05-20 | 平顶山东方碳素股份有限公司 | Carbon product impregnation technology |
| CN105272371A (en) * | 2015-10-10 | 2016-01-27 | 大同新成新材料股份有限公司 | Re-preheating impregnation method for unqualified impregnated graphite product |
| CN106426498A (en) * | 2016-11-14 | 2017-02-22 | 保定金宏达轻质板材制造有限公司 | Pitch-wood-wool plate production process |
| CN106521559A (en) * | 2016-12-01 | 2017-03-22 | 山东南山铝业股份有限公司 | Low-silicon electrolytic aluminum liquid and preparation method thereof |
| CN106757160A (en) * | 2016-12-01 | 2017-05-31 | 山东南山铝业股份有限公司 | Low silicon prebaked anode and preparation method thereof |
| CN107215855A (en) * | 2017-06-20 | 2017-09-29 | 中南大学 | A kind of equipment for the preparation method and its use for encrypting anode carbon block |
| CN107523846A (en) * | 2017-08-10 | 2017-12-29 | 中国铝业股份有限公司 | A kind of preparation method of prebaked anode |
| CN108624916A (en) * | 2018-07-09 | 2018-10-09 | 茌平华信碳素有限公司 | A kind of preparation method of anode carbon block for aluminium electrolysis |
| CN109764693A (en) * | 2019-01-24 | 2019-05-17 | 中南大学 | A kind of pre-heating mean and system using flue gas heat |
| CN110791780A (en) * | 2019-12-05 | 2020-02-14 | 中南大学 | Method for preparing prebaked anode by using aluminum electrolysis waste cathode carbon blocks |
| CN111302803A (en) * | 2020-03-19 | 2020-06-19 | 济宁碳素集团有限公司 | Preparation method of antioxidant prebaked anode for aluminum electrolysis |
| CN114380598A (en) * | 2021-12-29 | 2022-04-22 | 茌平华旭新材料有限公司 | Preparation process of prebaked anode carbon block |
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2007
- 2007-11-28 CN CN200710180559A patent/CN100580146C/en not_active Expired - Fee Related
Cited By (23)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN101993246B (en) * | 2009-08-27 | 2013-02-20 | 河南方圆炭素集团有限公司 | Thermal conductive graphite blocks for blast-furnace bottom and hearth |
| CN102249237A (en) * | 2010-12-20 | 2011-11-23 | 龚炳生 | Graphite crucible |
| CN102557671A (en) * | 2011-12-02 | 2012-07-11 | 贵州师范大学 | Petroleum coke preprocessing method for preparing prebaked carbon anode |
| CN103030401A (en) * | 2012-12-17 | 2013-04-10 | 山东平阴丰源炭素有限责任公司 | Production method of low-air-permeability prebaked anode |
| CN103030401B (en) * | 2012-12-17 | 2014-06-25 | 山东平阴丰源炭素有限责任公司 | Production method of low-air-permeability prebaked anode |
| CN104031669A (en) * | 2013-03-07 | 2014-09-10 | 神华集团有限责任公司 | Electrode pitch and preparation method thereof |
| CN103741168A (en) * | 2013-12-27 | 2014-04-23 | 中国神华能源股份有限公司 | Method for preparing prebaked anode used in aluminum production by using anthracite |
| CN104627981A (en) * | 2015-02-13 | 2015-05-20 | 平顶山东方碳素股份有限公司 | Carbon product impregnation technology |
| CN104627981B (en) * | 2015-02-13 | 2016-09-28 | 平顶山东方碳素股份有限公司 | A kind of impregnation technology of carbon goods |
| CN105272371A (en) * | 2015-10-10 | 2016-01-27 | 大同新成新材料股份有限公司 | Re-preheating impregnation method for unqualified impregnated graphite product |
| CN106426498A (en) * | 2016-11-14 | 2017-02-22 | 保定金宏达轻质板材制造有限公司 | Pitch-wood-wool plate production process |
| CN106521559A (en) * | 2016-12-01 | 2017-03-22 | 山东南山铝业股份有限公司 | Low-silicon electrolytic aluminum liquid and preparation method thereof |
| CN106757160A (en) * | 2016-12-01 | 2017-05-31 | 山东南山铝业股份有限公司 | Low silicon prebaked anode and preparation method thereof |
| CN106757160B (en) * | 2016-12-01 | 2019-07-02 | 山东南山铝业股份有限公司 | Low silicon prebaked anode and preparation method thereof |
| CN107215855A (en) * | 2017-06-20 | 2017-09-29 | 中南大学 | A kind of equipment for the preparation method and its use for encrypting anode carbon block |
| CN107523846A (en) * | 2017-08-10 | 2017-12-29 | 中国铝业股份有限公司 | A kind of preparation method of prebaked anode |
| CN107523846B (en) * | 2017-08-10 | 2019-03-19 | 中国铝业股份有限公司 | A kind of preparation method of prebaked anode |
| CN108624916A (en) * | 2018-07-09 | 2018-10-09 | 茌平华信碳素有限公司 | A kind of preparation method of anode carbon block for aluminium electrolysis |
| CN109764693A (en) * | 2019-01-24 | 2019-05-17 | 中南大学 | A kind of pre-heating mean and system using flue gas heat |
| CN110791780A (en) * | 2019-12-05 | 2020-02-14 | 中南大学 | Method for preparing prebaked anode by using aluminum electrolysis waste cathode carbon blocks |
| CN110791780B (en) * | 2019-12-05 | 2021-08-10 | 中南大学 | Method for preparing prebaked anode by using aluminum electrolysis waste cathode carbon blocks |
| CN111302803A (en) * | 2020-03-19 | 2020-06-19 | 济宁碳素集团有限公司 | Preparation method of antioxidant prebaked anode for aluminum electrolysis |
| CN114380598A (en) * | 2021-12-29 | 2022-04-22 | 茌平华旭新材料有限公司 | Preparation process of prebaked anode carbon block |
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