CN1033530A - Low-resistance anti-oxidized self-baking anode for electrolyzing aluminium - Google Patents
Low-resistance anti-oxidized self-baking anode for electrolyzing aluminium Download PDFInfo
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- CN1033530A CN1033530A CN 87108145 CN87108145A CN1033530A CN 1033530 A CN1033530 A CN 1033530A CN 87108145 CN87108145 CN 87108145 CN 87108145 A CN87108145 A CN 87108145A CN 1033530 A CN1033530 A CN 1033530A
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Abstract
The invention belongs to Aluminium Electrolysis conduction anode material.This soberberg anode is to utilize that damaged aluminium groove is removed and replaced the 4-87% refinery coke by the useless charcoal piece of electrolyte-impregnated and catalyzed graphitization or pitch coke adds coal-tar pitch and coal tar is made as binding agent.Its oxidation-resistance is stronger, and electrolytic oxidation consumption reduces 7-11%, and anode is than the low 11-44% of resistance, ton aluminium power saving 340-680 kilowatt-hour, and this soberberg anode sintering is fast, density is high, intensity is big, and its physicals has reached the prebaked anode technology and has indicated.Both be suitable for the side contact spike anode and also be suitable for the vertical spike anode.
Description
The present invention relates to the improvement of a kind of used for aluminium electrolysis soberberg anode (being anode mix) material.
It is main flux that sodium aluminum fluoride (Na3AeF6) fused salt is mostly adopted in existing metallurgy of aluminium industry, pass to the direct current reduction wherein fusion aluminum oxide and obtain the electrolytic process of liquid metal aluminium.The anode that this method adopted is a carbon annode.Carbon annode comprises and gives roasting and two kinds of self-bakings, and wherein soberberg anode accounts for 55%, and the raw material of making soberberg anode usually is refinery coke or pitch coke and coal pitch of agglomerant, and the consumption of its coal-tar pitch is 28-32%.Goods ultimate compression strength is the 270-380 kilograms per centimeter
2, be 68-80 ohm millimeter than resistance
2/ rice refines one ton of aluminium consumable anode and sticks with paste about 550 kilograms.Anode is the heart of aluminium cell, the basic demand of aluminum electrolysis process antianode is that porosity is low, density is big, little with the surface of oxygen effect, physical strength is big, electric conductivity is high, heat conduction is low, foreign matter content is few.
The purpose of this invention is to provide a kind of, density big consumption lack and cost low, pitch damage by fume little soberberg anode lower than the little power consumption of resistance.
Soberberg anode of the present invention is to utilize 4-87% to be melted the useless charcoal piece (as shown in table 1) of negative electrode that the damaged aluminium groove of salt dipping and catalyzed graphitization is removed by electrolytic aluminum, through water washing cleaning, cure pulverizings, batching, simultaneously add forging after refinery coke and mixed the pinching of binding agent form.
Table 1:
True specific gravity (g/cm
3) porosity (%) ultimate compression strength (kg/cm
2) than resistance (Ω mm
2/ M)
2.41-2.45 9-10 810-950 28-33
Ash content (%) thermal conductivity (kl/mh ℃)
32-42 32-33
Utilize useless charcoal piece to replace refinery coke or pitch Jiaozhuo soberberg anode aggregate, preferably the grain composition of Cai Yonging is :-12-+6 millimeter particle grating siccative weight 15-20%;-6-+1 millimeter particle grating 15-20% weight;-0.15 millimeter particle grating 45-51% weight wherein-0.075 a millimeter grade accounts for 25-36%;-1-+0.5 millimeter grade is a surplus; Binding agent be the heating after the liquid coal-tar pitch and/or the mixture of coal tar, softening temperature is 58-82 ℃ (ring and ball method), its consumption is 15-30%, is preferably 21-26%.
Adopting the intermittent type twin shaft to mix to pinch pot to mix pinches, at first the siccative with weighing adds in the pot, and its siccative temperature is higher than under the condition of 15-30 ℃ of binding agent softening temperature stirred 15-20 minute, continue to mix to pinch 35-40 minute after adding binding agent, its kneading temperature is adjusted routinely according to the softening temperature of employing binding agent again.
Routine: by above-mentioned technology, adopt useless charcoal piece to replace 50% refinery coke to make soberberg anode, its grain composition and binding agent are such as following:
-12-+6 millimeter 18%
-6-+1 millimeter 20%
-1-+0.15 millimeter 14%
-0.15 millimeter 48%
Wherein-0.075 millimeter 30%
Binding agent (72 ℃ of softening temperatures) 24%
Soberberg anode experimental result of the present invention and existing soberberg anode performance are relatively listed as table 2:
Table 2:
The novel prior art of soberberg anode full mold
Ultimate compression strength (kg/cm
2) 465 270-380
Than resistance (Ω mm
2/ M) 51 68-80
True specific gravity (g/cm
3) 2.15 1.97-2.02
Bulk specific weight (g/cm
3) 1.59 1.38-1.41
Porosity (%) 26 27-30
Ash content (%) 17 0.4-1.0
The above aluminium ingot of one-level (%) 100 100
Power consumption (kwh/t AL) 15,508 15878
60kA side contact spike groove anode
477 510-550
Consume (kg/t AL)
Table 2 shows: the every physicochemical property ash disposal of soberberg anode of the present invention reaches exceptionally substantially gives roasting anodic technical indicator.Its ash oontent is more greatly to contain electrolytical cause because of useless charcoal piece, these electrolyte distribution are in the structure of whole soberberg anode, during high-temperature electrolysis, when it suppresses carbon element component oxidation rate, follow anode consumption to get back in the electrolyzer again and reuse, it not only the quality of uncontaminated aluminium but obtain thus reclaiming.
Implementing advantage of the present invention is: the useless charcoal piece that utilizes damaged aluminium groove to remove replaces refinery coke to make soberberg anode, and every production one kiloton soberberg anode can be saved refinery coke 40-640 ton.This soberberg anode reduces 11-44% than resistance, and anode drop reduces the 0.1-0.2 volt, and quite ton aluminium power saving 340-680 kilowatt-hour, and anode electrolysis consumption reduces 7-11%, the few 4-7% of this soberberg anode binding agent consumption, and then cell room pitch damage by fume alleviates greatly.Soberberg anode good fluidity sintering of the present invention is fast, both has been suitable for the side contact spike anode and also has been applicable to the vertical spike anode, and its technical economic benefit is remarkable.
Below in conjunction with accompanying drawing soberberg anode of the present invention is further described:
With reference to Fig. 1, this synoptic diagram is a side contact spike formula electrolyzer.Soberberg anode (also claiming anode mix) is solid and packs into and be subjected to that supernatant liquid is stuck with paste behind the aluminium case 1 and anode cone 2 heating of switching on and be melted into flowability liquid preferably, after this under the effect of temperature, become thick and very fast coking again gradually and become high conductive anode " cone ", along with anode consumption is adjusted framework 3 whole anodes declines, move anode bar 4 simultaneously, in aluminium case 1, replenish anode mix again according to anode consumption then, carry out so repeatedly.Positive bar 5 is connected with anode bar, and anode 6 will keep certain pole span with anode, and 7 is anode conducting rod iron and bus thereof.
Fig. 2 is a vertical spike formula electrolyzer.Esoteric fusing-the coking of its anode is basically with Fig. 1 side contact spike formula electrolyzer, in the coking of anode middle and upper part coking band, form sintering cone 2 simultaneously, anode bar 4 is stuck with paste by the liquid on upper strata and is inserted within the cone 2 always, the hole that carries over behind the spike pulling is stuck with paste by the liquid of the binding agent of segregation usually and is filled, the result forms so-called secondary anode in hole, this secondary anode short texture, electrolysis is very fast, and anode body consumption is slower, so just, cause anode bottom injustice, disadvantage such as distribution of current inequality, current efficiency are low.
Aggregate and binding agent thereof that soberberg anode of the present invention adopts are described in front, this component anode mix fusing is very fast, and sintering (coking) is also very fast, has namely dwindled the segregation process of binding agent, and aggregate is again that to melt salt through electrolytic aluminium impregnated, and its proportion is up to 2.45g/cm3, this particles of aggregates quite easily crashes into and tamps the hole that anode stub is left over together with the low viscosity binders on surface, and can be in the same place with the body anode sintering very soon, so this soberberg anode CURRENT DISTRIBUTION is even, the anode normal operation is stable.
Claims (3)
1, the soberberg anode that is used for Aluminium Electrolysis is characterized in that the useless charcoal piece that utilizes damaged aluminium groove to remove makes aggregate and coal pitch of agglomerant or add coal tar to mix to pinch and form.Its useless charcoal piece consumption is a 4-87% weight.
2, anode according to claim 1 is characterized in that the particles of aggregates grating is :-12-+6 millimeter particle grating siccative weight 15-20%;-6-+1 millimeter particle grating 15-20% weight;-0.15 millimeter particle grating 45-51% weight wherein-0.075 a millimeter grade accounts for 25-36%;-1-+0.15 millimeter grade is a surplus.
3, anode according to claim 1 and 2 is characterized in that the binding agent consumption is the 21-26% of gross weight.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 87108145 CN1033530A (en) | 1987-12-15 | 1987-12-15 | Low-resistance anti-oxidized self-baking anode for electrolyzing aluminium |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 87108145 CN1033530A (en) | 1987-12-15 | 1987-12-15 | Low-resistance anti-oxidized self-baking anode for electrolyzing aluminium |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN1033530A true CN1033530A (en) | 1989-06-28 |
Family
ID=4816380
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN 87108145 Pending CN1033530A (en) | 1987-12-15 | 1987-12-15 | Low-resistance anti-oxidized self-baking anode for electrolyzing aluminium |
Country Status (1)
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|---|---|
| CN (1) | CN1033530A (en) |
Cited By (7)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN1082101C (en) * | 1999-04-09 | 2002-04-03 | 党建平 | Aluminium electrolyzer anode and its making method |
| CN100381611C (en) * | 2003-06-13 | 2008-04-16 | 李汉国 | Cold press moulding method for anode steel jaw protecting sleeve for aluminum and protecting sleeve produced thereby |
| CN101255572B (en) * | 2007-12-17 | 2010-07-21 | 中国铝业股份有限公司 | Method for making charcoal anode of aluminium by employing calcined anthracite |
| CN105401169A (en) * | 2015-11-04 | 2016-03-16 | 新疆生产建设兵团农八师天山铝业有限公司 | Environment-friendly recycling method for abandoned cathode carbon blocks of aluminum electrolysis cell |
| WO2018120255A1 (en) * | 2016-12-30 | 2018-07-05 | 山西精之铝科技有限公司 | Inbuilt conductor continuous aluminium frame anode aluminium electrolytic bath |
| CN112876249A (en) * | 2021-01-13 | 2021-06-01 | 山西沁新能源集团股份有限公司 | Method for preparing prebaked anode, prebaked anode and application thereof |
| CN114574904A (en) * | 2022-04-06 | 2022-06-03 | 东北大学 | Method for resource utilization of aluminum electrolysis carbon slag |
-
1987
- 1987-12-15 CN CN 87108145 patent/CN1033530A/en active Pending
Cited By (10)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN1082101C (en) * | 1999-04-09 | 2002-04-03 | 党建平 | Aluminium electrolyzer anode and its making method |
| CN100381611C (en) * | 2003-06-13 | 2008-04-16 | 李汉国 | Cold press moulding method for anode steel jaw protecting sleeve for aluminum and protecting sleeve produced thereby |
| CN101255572B (en) * | 2007-12-17 | 2010-07-21 | 中国铝业股份有限公司 | Method for making charcoal anode of aluminium by employing calcined anthracite |
| CN105401169A (en) * | 2015-11-04 | 2016-03-16 | 新疆生产建设兵团农八师天山铝业有限公司 | Environment-friendly recycling method for abandoned cathode carbon blocks of aluminum electrolysis cell |
| WO2018120255A1 (en) * | 2016-12-30 | 2018-07-05 | 山西精之铝科技有限公司 | Inbuilt conductor continuous aluminium frame anode aluminium electrolytic bath |
| US11015254B2 (en) | 2016-12-30 | 2021-05-25 | Shanxi Jingzhi Aluminium Technology Co., Ltd. | Aluminum electrolytic bath having continuous aluminum-frame anode with built-in conductors |
| CN112876249A (en) * | 2021-01-13 | 2021-06-01 | 山西沁新能源集团股份有限公司 | Method for preparing prebaked anode, prebaked anode and application thereof |
| CN112876249B (en) * | 2021-01-13 | 2022-07-08 | 山西沁新能源集团股份有限公司 | Method for preparing prebaked anode, prebaked anode and application thereof |
| CN114574904A (en) * | 2022-04-06 | 2022-06-03 | 东北大学 | Method for resource utilization of aluminum electrolysis carbon slag |
| CN114574904B (en) * | 2022-04-06 | 2024-04-05 | 东北大学 | Method for recycling aluminum electrolysis carbon slag |
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