CN108179442A - Prebaked anode and preparation method thereof - Google Patents
Prebaked anode and preparation method thereof Download PDFInfo
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- CN108179442A CN108179442A CN201810072230.7A CN201810072230A CN108179442A CN 108179442 A CN108179442 A CN 108179442A CN 201810072230 A CN201810072230 A CN 201810072230A CN 108179442 A CN108179442 A CN 108179442A
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- 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 present invention relates to a kind of new prebaked anodes and preparation method thereof.The prebaked anode bulk density and compressive resistance are higher, and resistivity is relatively low, while carbon dioxide and air reactive are improved；The preparation method energy expenditure is low, and financial cost is low.
Description
Technical field
The invention belongs to metal metallurgy smelting fields, are related to a kind of aluminium cell anode and its production method, and more particularly to one
Kind prebaked anode and preparation method thereof.
Background technology
In aluminum electrolysis process, prebaked anode plays a crucial role in aluminium cell production technology.First, in advance
Roasting anode induces current into electrolytic cell as conductor；Secondly, prebaked anode participates in aluminium electroloysis reaction as anode material.Therefore,
The comprehensive quality of prebaked anode has larger impact to current efficiency, electrolysis energy consumption, primary aluminum stability and cost control.However,
Since prebaked anode excessively reacts in the actual production process with air and carbon dioxide, carbon slag can be caused to come off, electric current
The problems such as efficiency declines.
Therefore, it is urgent to provide a kind of new prebaked anodes and preparation method thereof.
Invention content
One of the object of the invention is to provide a kind of new prebaked anode.The prebaked anode bulk density and compressive resistance compared with
Height, resistivity is relatively low, while carbon dioxide and air reactive are improved.
The two of the object of the invention are to provide a kind of prebaked anode preparation method.The preparation method energy expenditure is low, it is economical into
This is low.
To solve the above-mentioned problems, on the one hand, the present invention takes following technical scheme：
A kind of preparation method of prebaked anode, includes the following steps：
After-smithing petroleum coke material screening is classified, obtains particulate material and powder：
After-smithing petroleum coke particulate material and powder kneading is uniform, then preheating adds in coal tar pitch and additive；Then it mixes again
It pinches uniformly, heating after a certain period of time, obtains mixed paste；
Mixed paste is fitted into mold in batches, it is hot-forming, obtain prebaked anode life block；
Prebaked anode life block is placed in roasting kiln roasting；Temperature fall after the completion of roasting, obtains prebaked anode.
Preparation method according to the present invention, wherein, the after-smithing petroleum coke particulate material and powder include 0.15mm ＜
The microparticle material of grain size≤1mm；The fine grained material of 1mm ＜ grain sizes≤3mm；The middle particulate material of 3mm ＜ grain sizes≤6mm；6mm ＜
The coarse granule material of diameter≤14mm and the powder of grain size≤0.15mm.
Preferably, the after-smithing petroleum coke particulate material and powder are as follows：
The microparticle material 10-40wt% of 0.15mm ＜ grain sizes≤1mm；
The fine grained material 15-45wt% of 1mm ＜ grain sizes≤3mm；
The middle particulate material 0.1-25wt% of 3mm ＜ grain sizes≤6mm；
The coarse granule material 0.1-25wt% of 6mm ＜ grain sizes≤14mm；
The powder 5-35wt% of grain size≤0.15mm.
It is highly preferred that the after-smithing petroleum coke particulate material and powder are as follows：
The microparticle material 15-35wt% of 0.15mm ＜ grain sizes≤1mm；
The fine grained material 20-40wt% of 1mm ＜ grain sizes≤3mm；
The middle particulate material 2.5-20wt% of 3mm ＜ grain sizes≤6mm；
The coarse granule material 2.5-20wt% of 6mm ＜ grain sizes≤14mm；
The powder 10-30wt% of grain size≤0.15mm.
Most preferably, the after-smithing petroleum coke particulate material and powder are as follows：
The microparticle material 20-30wt% of 0.15mm ＜ grain sizes≤1mm；
The fine grained material 25-35wt% of 1mm ＜ grain sizes≤3mm；
The middle particulate material 5-15wt% of 3mm ＜ grain sizes≤6mm；
The coarse granule material 5-15wt% of 6mm ＜ grain sizes≤14mm；
The powder 15-25wt% of grain size≤0.15mm.
In a specific embodiment, the after-smithing petroleum coke particulate material and powder are as follows：
The microparticle material 25wt% of 0.15mm ＜ grain sizes≤1mm；
The fine grained material 20wt% of 1mm ＜ grain sizes≤3mm；
The middle particulate material 10wt% of 3mm ＜ grain sizes≤6mm；
The coarse granule material 10wt% of 6mm ＜ grain sizes≤14mm；
The powder 25wt% of grain size≤0.15mm.
Preparation method according to the present invention, wherein, the preheating temperature is 150-180 DEG C；The heating temperature is
150-180 DEG C, the time is 10-30min.
Preferably, the preheating temperature is 155-175 DEG C；The heating temperature is 155-175 DEG C, and the time is 15-
30min。
It is highly preferred that the preheating temperature is 155-170 DEG C；The heating temperature is 155-170 DEG C, and the time is
20-30min。
Most preferably, the preheating temperature is 155-165 DEG C；The heating temperature is 155-165 DEG C, and the time is
20-25min。
In a specific embodiment, the preheating temperature is 160 DEG C；The heating temperature is 160 DEG C, when described
Between be 20min.
Preparation method according to the present invention, wherein, the coal tar pitch is selected from modified coal pitch.
Preferably, the softening point of the modified coal pitch is 105-120 DEG C, β-resin 15-25wt%, toluene insolubles
25-35wt%, quinoline insolubles 6-12wt%, coking value 54-60%.
It is highly preferred that the softening point of the modified coal pitch is 106-118 DEG C, β-resin 17-23wt%, toluene insolubles
26-34wt%, quinoline insolubles 7-11wt%, coking value 55-59%.
Most preferably, the softening point of the modified coal pitch is 108-114 DEG C, β-resin 18-22wt%, toluene insolubles
28-32wt%, quinoline insolubles 8-10wt%, coking value 56-58%.
In a specific embodiment, the softening point of the coal tar pitch is 110 DEG C, β-resin 21.3wt%, toluene
Insoluble matter 31.2wt%, quinoline insolubles 9.2wt%, coking value 57.4%.
Preparation method according to the present invention, wherein, the additive is magnesium bicarbonate and borax mixture.
Preferably, the additive is weight ratio 1:The magnesium bicarbonate of (1-9) and borax mixture.
It is highly preferred that the additive is weight ratio 1:The magnesium bicarbonate of (2-8) and borax mixture.
Most preferably, the additive is weight ratio 1:The magnesium bicarbonate of (3-6) and borax mixture.
In a specific embodiment, the additive is weight ratio 1:4 magnesium bicarbonate and borax mixture.
Preparation method according to the present invention, wherein, the after-smithing petroleum coke particulate material and powder：The weight of coal tar pitch
Than for (78-90):(10-22)；(0.1-2.0) % of the additive for the sum of the two weight.
Preferably, the after-smithing petroleum coke particulate material and powder：The weight ratio of coal tar pitch is (80-88):(12-20)；Institute
State (0.2-1.6) % of additive for the sum of the two weight.
Most preferably, the after-smithing petroleum coke particulate material and powder：The weight ratio of coal tar pitch is (82-86):(14-18)；
(0.4-1.2) % of the additive for the sum of the two weight.
In a specific embodiment, the after-smithing petroleum coke particulate material and powder：The weight ratio of coal tar pitch is 84:
16；The additive is the 0.6% of the sum of the two weight.
Preparation method according to the present invention, wherein, the Baking profile is as follows：Room temperature is to 250 DEG C, 2-3h；250-
650 DEG C, 6-7h；650-1000 DEG C, 5-6h；1000 DEG C, keep the temperature 3-4h.
In a specific embodiment, the Baking profile is as follows：Room temperature is to 250 DEG C, 3h；250-650 DEG C, 7h；
650-1000 DEG C, 6h；1000 DEG C, keep the temperature 3h.
On the other hand, the present invention also provides the obtained prebaked anodes of aforementioned preparation process.
Compared with prior art, the present invention has following advantageous effects：
1) bulk density of the obtained prebaked anode of the present invention and real density, which have, largely improves, and compressive resistance is also shown
It writes and improves, resistivity declines apparent；
2) air reactive of the obtained prebaked anode of the present invention and reaction of carbon dioxide are improved, so as to reduce
Loss ratio；
3) preparation method energy expenditure of the invention is low, and financial cost is low；Better than the prior art.
Specific embodiment
The invention will be further elucidated with reference to specific embodiments.It should be understood that these embodiments are merely to illustrate this hair
It is bright rather than limit the scope of the invention.In addition, it should also be understood that, after present disclosure has been read, those skilled in the art
The present invention can be made various changes or modifications, such equivalent forms equally fall within what the application the appended claims were limited
Range.
It will be helpful to understand the present invention, but cannot limit the scope of the invention by following embodiments.
Embodiment 1：
After-smithing petroleum coke material screening is classified, obtains following particulate material and powder：Micro- of 0.15mm ＜ grain sizes≤1mm
Pellet 25wt%；The fine grained material 30wt% of 1mm ＜ grain sizes≤3mm；The middle particulate material 10wt% of 3mm ＜ grain sizes≤6mm；6mm
The coarse granule material 10wt% of ＜ grain sizes≤14mm；The powder 25wt% of grain size≤0.15mm；After-smithing petroleum coke particulate material and powder
Total weight be 4kg.
After-smithing petroleum coke particulate material and powder kneading is uniform, 160 DEG C are preheated to, coal tar pitch 0.87kg is then added in and adds
Add agent 0.03kg.Wherein, the softening point of the coal tar pitch is 110 DEG C, β-resin 21.3wt%, toluene insolubles 31.2wt%,
Quinoline insolubles 9.2wt%, coking value 57.4%.The additive is weight ratio 1:4 magnesium bicarbonate and borax mixture.So
Kneading is uniform again afterwards, is heated to 160 DEG C, is taken out after 25min, obtains mixed paste.
Mixed paste is fitted into mold in batches, it is hot-forming, 50MPa, pressurize 1min are molded, obtains prebaked anode life
Block.
Prebaked anode life block is placed in roasting kiln roasting, Baking profile is as follows：Room temperature is to 250 DEG C, 3h；250-650 DEG C,
7h；650-1000 DEG C, 6h；1000 DEG C, keep the temperature 3h；Temperature fall after the completion of roasting, obtains prebaked anode.
Embodiment 2：
After-smithing petroleum coke material screening is classified, obtains following particulate material and powder：Micro- of 0.15mm ＜ grain sizes≤1mm
Pellet 20wt%；The fine grained material 35wt% of 1mm ＜ grain sizes≤3mm；The middle particulate material 15wt% of 3mm ＜ grain sizes≤6mm；6mm
The coarse granule material 15wt% of ＜ grain sizes≤14mm；The powder 15wt% of grain size≤0.15mm；After-smithing petroleum coke particulate material and powder
Total weight be 4kg.
After-smithing petroleum coke particulate material and powder kneading is uniform, 180 DEG C are preheated to, coal tar pitch 0.65kg is then added in and adds
Add agent 0.05kg.Wherein, the softening point of the coal tar pitch is 110 DEG C, β-resin 21.3wt%, toluene insolubles 31.2wt%,
Quinoline insolubles 9.2wt%, coking value 57.4%.The additive is weight ratio 1:3 magnesium bicarbonate and borax mixture.So
Kneading is uniform again afterwards, is heated to 180 DEG C, is taken out after 10min, obtains mixed paste.
Mixed paste is fitted into mold in batches, it is hot-forming, 50MPa, pressurize 1min are molded, obtains prebaked anode life
Block.
Prebaked anode life block is placed in roasting kiln roasting, Baking profile is as follows：Room temperature is to 250 DEG C, 2h；250-650 DEG C,
6h；650-1000 DEG C, 5h；1000 DEG C, keep the temperature 4h；Temperature fall after the completion of roasting, obtains prebaked anode.
Embodiment 3：
After-smithing petroleum coke material screening is classified, obtains following particulate material and powder：Micro- of 0.15mm ＜ grain sizes≤1mm
Pellet 30wt%；The fine grained material 25wt% of 1mm ＜ grain sizes≤3mm；The middle particulate material 5wt% of 3mm ＜ grain sizes≤6mm；6mm ＜
The coarse granule material 5wt% of grain size≤14mm；The powder 25wt% of grain size≤0.15mm；After-smithing petroleum coke particulate material and powder it is total
Weight is 4kg.
After-smithing petroleum coke particulate material and powder kneading is uniform, 150 DEG C are preheated to, coal tar pitch 0.76kg is then added in and adds
Add agent 0.04kg.Wherein, the softening point of the coal tar pitch is 110 DEG C, β-resin 21.3wt%, toluene insolubles 31.2wt%,
Quinoline insolubles 9.2wt%, coking value 57.4%.The additive is weight ratio 1:6 magnesium bicarbonate and borax mixture.So
Kneading is uniform again afterwards, is heated to 150 DEG C, is taken out after 30min, obtains mixed paste.
Mixed paste is fitted into mold in batches, it is hot-forming, 50MPa, pressurize 1min are molded, obtains prebaked anode life
Block.
Prebaked anode life block is placed in roasting kiln roasting, Baking profile is as follows：Room temperature is to 250 DEG C, 2.5h；250-650
DEG C, 6.5h；650-1000 DEG C, 5.5h；1000 DEG C, keep the temperature 3.5h；Temperature fall after the completion of roasting, obtains prebaked anode.
Comparative example 1：
After-smithing petroleum coke material screening is classified, obtains following particulate material and powder：Micro- of 0.15mm ＜ grain sizes≤1mm
Pellet 25wt%；The fine grained material 30wt% of 1mm ＜ grain sizes≤3mm；The middle particulate material 10wt% of 3mm ＜ grain sizes≤6mm；6mm
The coarse granule material 10wt% of ＜ grain sizes≤14mm；The powder 25wt% of grain size≤0.15mm；After-smithing petroleum coke particulate material and powder
Total weight be 4kg.
After-smithing petroleum coke particulate material and powder kneading is uniform, 160 DEG C are preheated to, then adds in coal tar pitch 0.87kg.Its
In, the softening point of the coal tar pitch is 110 DEG C, β-resin 21.3wt%, toluene insolubles 31.2wt%, quinoline insolubles
9.2wt%, coking value 57.4%.Then kneading is uniform again, is heated to 160 DEG C, is taken out after 25min, obtains mixed paste.
Mixed paste is fitted into mold in batches, it is hot-forming, 50MPa, pressurize 1min are molded, obtains prebaked anode life
Block.
Prebaked anode life block is placed in roasting kiln roasting, Baking profile is as follows：Room temperature is to 250 DEG C, 3h；250-650 DEG C,
7h；650-1000 DEG C, 6h；1000 DEG C, keep the temperature 3h；Temperature fall after the completion of roasting, obtains prebaked anode.
Comparative example 2：
After-smithing petroleum coke material screening is classified, obtains following particulate material and powder：Micro- of 0.15mm ＜ grain sizes≤1mm
Pellet 25wt%；The fine grained material 30wt% of 1mm ＜ grain sizes≤3mm；The middle particulate material 10wt% of 3mm ＜ grain sizes≤6mm；6mm
The coarse granule material 10wt% of ＜ grain sizes≤14mm；The powder 25wt% of grain size≤0.15mm；After-smithing petroleum coke particulate material and powder
Total weight be 4kg.
After-smithing petroleum coke particulate material and powder kneading is uniform, 160 DEG C are preheated to, coal tar pitch 0.87kg is then added in and adds
Add agent 0.03kg.Wherein, the softening point of the coal tar pitch is 110 DEG C, β-resin 21.3wt%, toluene insolubles 31.2wt%,
Quinoline insolubles 9.2wt%, coking value 57.4%.The additive is magnesium bicarbonate.Then kneading is uniform again, is heated to 160
DEG C, it is taken out after 25min, obtains mixed paste.
Mixed paste is fitted into mold in batches, it is hot-forming, 50MPa, pressurize 1min are molded, obtains prebaked anode life
Block.
Prebaked anode life block is placed in roasting kiln roasting, Baking profile is as follows：Room temperature is to 250 DEG C, 3h；250-650 DEG C,
7h；650-1000 DEG C, 6h；1000 DEG C, keep the temperature 3h；Temperature fall after the completion of roasting, obtains prebaked anode.
Comparative example 3：
After-smithing petroleum coke material screening is classified, obtains following particulate material and powder：Micro- of 0.15mm ＜ grain sizes≤1mm
Pellet 25wt%；The fine grained material 30wt% of 1mm ＜ grain sizes≤3mm；The middle particulate material 10wt% of 3mm ＜ grain sizes≤6mm；6mm
The coarse granule material 10wt% of ＜ grain sizes≤14mm；The powder 25wt% of grain size≤0.15mm；After-smithing petroleum coke particulate material and powder
Total weight be 4kg.
After-smithing petroleum coke particulate material and powder kneading is uniform, 160 DEG C are preheated to, coal tar pitch 0.87kg is then added in and adds
Add agent 0.03kg.Wherein, the softening point of the coal tar pitch is 110 DEG C, β-resin 21.3wt%, toluene insolubles 31.2wt%,
Quinoline insolubles 9.2wt%, coking value 57.4%.The additive is borax.Then kneading is uniform again, is heated to 160 DEG C,
It is taken out after 25min, obtains mixed paste.
Mixed paste is fitted into mold in batches, it is hot-forming, 50MPa, pressurize 1min are molded, obtains prebaked anode life
Block.
Prebaked anode life block is placed in roasting kiln roasting, Baking profile is as follows：Room temperature is to 250 DEG C, 3h；250-650 DEG C,
7h；650-1000 DEG C, 6h；1000 DEG C, keep the temperature 3h；Temperature fall after the completion of roasting, obtains prebaked anode.
Comparative example 4：
After-smithing petroleum coke material screening is classified, obtains following particulate material and powder：Micro- of 0.15mm ＜ grain sizes≤1mm
Pellet 25wt%；The fine grained material 30wt% of 1mm ＜ grain sizes≤3mm；The middle particulate material 10wt% of 3mm ＜ grain sizes≤6mm；6mm
The coarse granule material 10wt% of ＜ grain sizes≤14mm；The powder 25wt% of grain size≤0.15mm；After-smithing petroleum coke particulate material and powder
Total weight be 4kg.
After-smithing petroleum coke particulate material and powder kneading is uniform, 160 DEG C are preheated to, coal tar pitch 0.87kg is then added in and adds
Add agent 0.03kg.Wherein, the softening point of the coal tar pitch is 110 DEG C, β-resin 21.3wt%, toluene insolubles 31.2wt%,
Quinoline insolubles 9.2wt%, coking value 57.4%.The additive is weight ratio 1:10 magnesium bicarbonate and borax mixture.
Then kneading is uniform again, is heated to 160 DEG C, is taken out after 25min, obtains mixed paste.
Mixed paste is fitted into mold in batches, it is hot-forming, 50MPa, pressurize 1min are molded, obtains prebaked anode life
Block.
Prebaked anode life block is placed in roasting kiln roasting, Baking profile is as follows：Room temperature is to 250 DEG C, 3h；250-650 DEG C,
7h；650-1000 DEG C, 6h；1000 DEG C, keep the temperature 3h；Temperature fall after the completion of roasting, obtains prebaked anode.
Comparative example 5：
After-smithing petroleum coke material screening is classified, obtains following particulate material and powder：Micro- of 0.15mm ＜ grain sizes≤1mm
Pellet 25wt%；The fine grained material 30wt% of 1mm ＜ grain sizes≤3mm；The middle particulate material 10wt% of 3mm ＜ grain sizes≤6mm；6mm
The coarse granule material 10wt% of ＜ grain sizes≤14mm；The powder 25wt% of grain size≤0.15mm；After-smithing petroleum coke particulate material and powder
Total weight be 4kg.
After-smithing petroleum coke particulate material and powder kneading is uniform, 160 DEG C are preheated to, coal tar pitch 0.87kg is then added in and adds
Add agent 0.03kg.Wherein, the softening point of the coal tar pitch is 110 DEG C, β-resin 21.3wt%, toluene insolubles 31.2wt%,
Quinoline insolubles 9.2wt%, coking value 57.4%.The additive is weight ratio 1:4 magnesium bicarbonate and borax mixture.So
Kneading is uniform again afterwards, is heated to 160 DEG C, is taken out after 25min, obtains mixed paste.
Mixed paste is fitted into mold in batches, it is hot-forming, 50MPa, pressurize 1min are molded, obtains prebaked anode life
Block.
Prebaked anode life block is placed in roasting kiln roasting, Baking profile is as follows：Room temperature is to 250 DEG C, 5h；250-650 DEG C,
5h；650-1000 DEG C, 3h；1000 DEG C, keep the temperature 5h；Temperature fall after the completion of roasting, obtains prebaked anode.
Comparative example 6：
After-smithing petroleum coke material screening is classified, obtains following particulate material and powder：Micro- of 0.15mm ＜ grain sizes≤1mm
Pellet 25wt%；The fine grained material 30wt% of 1mm ＜ grain sizes≤3mm；The middle particulate material 10wt% of 3mm ＜ grain sizes≤6mm；6mm
The coarse granule material 10wt% of ＜ grain sizes≤14mm；The powder 25wt% of grain size≤0.15mm；After-smithing petroleum coke particulate material and powder
Total weight be 4kg.
After-smithing petroleum coke particulate material and powder kneading is uniform, 160 DEG C are preheated to, coal tar pitch 0.87kg is then added in and adds
Add agent 0.03kg.Wherein, the softening point of the coal tar pitch is 110 DEG C, β-resin 21.3wt%, toluene insolubles 31.2wt%,
Quinoline insolubles 9.2wt%, coking value 57.4%.The additive is weight ratio 1:4 magnesium bicarbonate and borax mixture.So
Kneading is uniform again afterwards, is heated to 160 DEG C, is taken out after 25min, obtains mixed paste.
Mixed paste is fitted into mold in batches, it is hot-forming, 50MPa, pressurize 1min are molded, obtains prebaked anode life
Block.
Prebaked anode life block is placed in roasting kiln roasting, Baking profile is as follows：Room temperature is to 250 DEG C, 3h；250-650 DEG C,
7h；650-1000 DEG C, 2h；1000 DEG C, keep the temperature 6h；Temperature fall after the completion of roasting, obtains prebaked anode.
Then the performance for prebaked anode obtained by each embodiment and comparative example being tested according to professional standard YS/T285-2012 is joined
Number, and measured using anode air reaction detector and carbon dioxide reaction detector, it calculates air and carbon dioxide reaction is residual
Remaining rate and expulsion rate.
Table 1 gives the performance parameter of prebaked anode obtained by embodiment 1-3 and comparative example 1-6.
Table 1
As can be seen from Table 1, the performance parameter of prebaked anode obtained by the embodiment of the present application 1-3 is significantly better than comparative example 1-6
Gained prebaked anode performance parameter；Simultaneously also superior to the performance parameter of industry primes and seconds.With 1 phase of comparative example
Have than, bulk density and real density and largely improve, compressive resistance also significantly improves, and resistivity declines apparent；Same space-time
Solid/liquid/gas reactions and reaction of carbon dioxide are improved, so as to reduce loss ratio.Compared with comparative example 2-4, it can be seen that
It not only can significantly more improve bulk density, real density, compressive resistance and resistance using the additive of the application special ratios
Rate, while significantly reduce loss ratio.Comparative example 5-6 then illustrates that Baking profile equally influences whether the application prebaked anode
Performance.
The foregoing is only a preferred embodiment of the present invention, is not intended to restrict the invention, for the skill of this field
For art personnel, the invention may be variously modified and varied.All within the spirits and principles of the present invention, that is made any repaiies
Change, equivalent replacement, improvement etc., be all contained within protection scope of the present invention.
Claims (10)
1. a kind of preparation method of prebaked anode, includes the following steps：
After-smithing petroleum coke material screening is classified, obtains particulate material and powder：
After-smithing petroleum coke particulate material and powder kneading is uniform, then preheating adds in coal tar pitch and additive；Then kneading is equal again
Even, heating after a certain period of time, obtains mixed paste；
Mixed paste is fitted into mold in batches, it is hot-forming, obtain prebaked anode life block；
Prebaked anode life block is placed in roasting kiln roasting；Temperature fall after the completion of roasting, obtains prebaked anode.
2. preparation method according to claim 1, wherein, the after-smithing petroleum coke particulate material and powder include 0.15mm ＜
The microparticle material of grain size≤1mm；The fine grained material of 1mm ＜ grain sizes≤3mm；The middle particulate material of 3mm ＜ grain sizes≤6mm；6mm ＜
The coarse granule material of diameter≤14mm and the powder of grain size≤0.15mm.
3. preparation method according to claim 2, wherein, the after-smithing petroleum coke particulate material and powder are as follows：
The microparticle material 20-30wt% of 0.15mm ＜ grain sizes≤1mm；
The fine grained material 25-35wt% of 1mm ＜ grain sizes≤3mm；
The middle particulate material 5-15wt% of 3mm ＜ grain sizes≤6mm；
The coarse granule material 5-15wt% of 6mm ＜ grain sizes≤14mm；
The powder 15-25wt% of grain size≤0.15mm.
4. preparation method according to claim 1, wherein, the preheating temperature is 150-180 DEG C；The heating temperature is
150-180 DEG C, the time is 10-30min.
5. preparation method according to claim 1, wherein, the coal tar pitch is selected from modified coal pitch；The modified coal drip
Green softening point is 108-114 DEG C, β-resin 18-22wt%, toluene insolubles 28-32wt%, quinoline insolubles 8-10wt%,
Coking value 56-58%.
6. preparation method according to claim 1, wherein, the additive is magnesium bicarbonate and borax mixture.
7. preparation method according to claim 6, wherein, the additive is weight ratio 1:The magnesium bicarbonate of (3-6) and
Borax mixture.
8. preparation method according to claim 1, wherein, the after-smithing petroleum coke particulate material and powder：The weight of coal tar pitch
Amount is than being (82-86):(14-18)；(0.4-1.2) % of the additive for the sum of the two weight.
9. preparation method according to claim 1, wherein, the Baking profile is as follows：Room temperature is to 250 DEG C, 2-3h；250-
650 DEG C, 6-7h；650-1000 DEG C, 5-6h；1000 DEG C, keep the temperature 3-4h.
10. a kind of prebaked anode, which is characterized in that obtained using the preparation method described in claim 1-9.
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201810072230.7A CN108179442B (en) | 2018-01-25 | 2018-01-25 | Prebaked anode and preparation method thereof |
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