CN101580948A - Charging method for pre-baking aluminum electrolytic tank - Google Patents
Charging method for pre-baking aluminum electrolytic tank Download PDFInfo
- Publication number
- CN101580948A CN101580948A CNA2009100877440A CN200910087744A CN101580948A CN 101580948 A CN101580948 A CN 101580948A CN A2009100877440 A CNA2009100877440 A CN A2009100877440A CN 200910087744 A CN200910087744 A CN 200910087744A CN 101580948 A CN101580948 A CN 101580948A
- Authority
- CN
- China
- Prior art keywords
- anode
- millimeter
- electrolyte block
- electrolytic tank
- petroleum coke
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Pending
Links
- 238000000034 method Methods 0.000 title claims abstract description 27
- XAGFODPZIPBFFR-UHFFFAOYSA-N aluminium Chemical compound [Al] XAGFODPZIPBFFR-UHFFFAOYSA-N 0.000 title abstract description 19
- 229910052782 aluminium Inorganic materials 0.000 title abstract description 19
- 239000003792 electrolyte Substances 0.000 claims abstract description 23
- 239000002245 particle Substances 0.000 claims abstract description 16
- OKTJSMMVPCPJKN-UHFFFAOYSA-N Carbon Chemical compound [C] OKTJSMMVPCPJKN-UHFFFAOYSA-N 0.000 claims abstract description 8
- WUKWITHWXAAZEY-UHFFFAOYSA-L calcium difluoride Chemical compound [F-].[F-].[Ca+2] WUKWITHWXAAZEY-UHFFFAOYSA-L 0.000 claims abstract description 8
- 229910001634 calcium fluoride Inorganic materials 0.000 claims abstract description 8
- 239000010439 graphite Substances 0.000 claims abstract description 8
- 229910002804 graphite Inorganic materials 0.000 claims abstract description 8
- 238000007789 sealing Methods 0.000 claims abstract description 7
- 239000002006 petroleum coke Substances 0.000 claims description 18
- -1 sodium aluminum fluoride Chemical compound 0.000 claims description 8
- 238000001354 calcination Methods 0.000 claims description 7
- 238000012216 screening Methods 0.000 claims description 4
- 229910052799 carbon Inorganic materials 0.000 claims description 3
- 239000012535 impurity Substances 0.000 abstract description 7
- 229910000831 Steel Inorganic materials 0.000 abstract description 4
- 239000010425 asbestos Substances 0.000 abstract description 4
- 239000000378 calcium silicate Substances 0.000 abstract description 4
- 229910052918 calcium silicate Inorganic materials 0.000 abstract description 4
- OYACROKNLOSFPA-UHFFFAOYSA-N calcium;dioxido(oxo)silane Chemical compound [Ca+2].[O-][Si]([O-])=O OYACROKNLOSFPA-UHFFFAOYSA-N 0.000 abstract description 4
- 238000011084 recovery Methods 0.000 abstract description 4
- 229910052895 riebeckite Inorganic materials 0.000 abstract description 4
- 239000010959 steel Substances 0.000 abstract description 4
- 239000003566 sealing material Substances 0.000 abstract description 2
- 239000000571 coke Substances 0.000 abstract 1
- 238000001914 filtration Methods 0.000 abstract 1
- 239000004575 stone Substances 0.000 abstract 1
- 239000004411 aluminium Substances 0.000 description 4
- 238000004519 manufacturing process Methods 0.000 description 3
- 239000000463 material Substances 0.000 description 3
- 238000005303 weighing Methods 0.000 description 3
- XEEYBQQBJWHFJM-UHFFFAOYSA-N Iron Chemical compound [Fe] XEEYBQQBJWHFJM-UHFFFAOYSA-N 0.000 description 2
- CDBYLPFSWZWCQE-UHFFFAOYSA-L Sodium Carbonate Chemical compound [Na+].[Na+].[O-]C([O-])=O CDBYLPFSWZWCQE-UHFFFAOYSA-L 0.000 description 2
- 238000005868 electrolysis reaction Methods 0.000 description 2
- 238000005516 engineering process Methods 0.000 description 2
- 239000007788 liquid Substances 0.000 description 2
- 150000001875 compounds Chemical class 0.000 description 1
- 230000007812 deficiency Effects 0.000 description 1
- 239000012467 final product Substances 0.000 description 1
- 229910052742 iron Inorganic materials 0.000 description 1
- 229910052710 silicon Inorganic materials 0.000 description 1
- 239000010703 silicon Substances 0.000 description 1
- 238000004513 sizing Methods 0.000 description 1
- 229910000029 sodium carbonate Inorganic materials 0.000 description 1
- 235000017550 sodium carbonate Nutrition 0.000 description 1
- 210000000952 spleen Anatomy 0.000 description 1
- 210000002784 stomach Anatomy 0.000 description 1
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- Electrolytic Production Of Metals (AREA)
Abstract
A charging method for a pre-baking aluminum electrolytic tank relates to a charging method when the electrolytic tank is started during aluminum electrolyzing process. The invention is characterized in that the furnace charging process comprises the following steps: (1) filtering purely calcined petrol coke particles and laying the particles on a graphite cathode; (2) installing an anode; (3) laying calcium fluoride on the edge artificial extension leg; (4) selecting an electrolyte block as a sealing object for sealing the break joint and centre joint of the anode and covering a paper sheet on the electrolyte block; and (5) covering the anode by an ice stone with a thickness of 10-25 cm. No impurity is brought into the electrolyte system in the method of the invention, in particular the electrolyte block and the paper sheet are used as sealing materials for sealing break joint and centre joint of the anode, and the electrolyte block without impurities and newspaper are used in place of steel plate, asbestos board and calcium silicate board during charging process. Therefore, the method rapidly recovers the primary aluminum mass of a newly started electrolytic tank, greatly shortens the recovery period of the primary aluminum mass, reduces the start cost of the electrolytic tank and achieves remarkable economical benefit.
Description
Technical field
A kind of shove charge method of pre-calcining electrolytic cell, the shove charge method when relating to a kind of electrobath start of aluminium electrolysis process.
Background technology
The startup of electrolyzer is divided into two kinds of dry starting and wet starts, and it is the indispensable process of electrolysis production, and the quality of startup directly has influence on the stably manufactured of electrolyzer, the quality of primary aluminum and the life-span of electrolyzer etc.Shove charge before starting is to realize one of key operation that the calcination temperature evenly rises, and the wet start scheme is mainly adopted in the startup of electrolyzer after the overhaul at present, and the charging technique before starting is as follows:
1. with pure after-smithing petroleum coke grain sizing screening, preheating, and then proportionally evenly mixed, make the after-smithing petroleum coke grain through being layed on the graphite cathode uniformly behind the scorched particle bed; 2. anode is installed, is guaranteed that the anode bottom fully contacts with the after-smithing petroleum coke grain; 3. at the limit portion an amount of Calcium Fluoride (Fluorspan) in the artificial upper berth of stretching one's legs; 4. anode break joint, the centre joint adopt material seals such as steel plate, asbestos plate and calcium silicate board; 5. cover with sodium aluminum fluoride on the anode, shove charge is finished.
Because this kind charging technique 4. middle-jiao yang, function of the spleen and stomach interpolar seam, the centre joint adopts material seals such as steel plate, asbestos plate and calcium silicate board, after starting, groove fuses into inevitably in the aluminium liquid, make the new electrolyzer primary aluminum grade that starts be generally 99.00%, and contain impurity such as high-load silicon, iron, these impurity make the restore cycle longer, generally needing increased the start-up cost of electrolyzer about 25-30 days, had influenced the production economic benefit.
Summary of the invention
Purpose of the present invention is exactly the deficiency that exists at above-mentioned technology, provides a kind of and can effectively reduce the shove charge cost, makes the quality of new startup electrolyzer primary aluminum quickly recover to set requirement, reduces the shove charge method of the pre-calcining electrolytic cell of the impurity in the aluminium liquid.
The objective of the invention is to be achieved through the following technical solutions.
A kind of shove charge method of pre-calcining electrolytic cell is characterized in that its loading furnace process step comprises:
(1) pure after-smithing petroleum coke grain screening back is divided into the 0.2-1 millimeter by particle size, three ranks of 1-2 millimeter and 2-4 millimeter, be preheated to 100-300 ℃, be behind 50: 27: 23 the ratio uniform mixing, to be layed in the after-smithing petroleum coke grain on the graphite cathode uniformly then with these three kinds of rank particles according to weight ratio;
(2) anode is installed, the anode bottom is fully contacted with the after-smithing petroleum coke grain;
(3) limit portion is artificial is paved with Calcium Fluoride (Fluorspan) on stretching one's legs;
(4) select size be respectively 40-70 millimeter and 220-300 millimeter, molecular ratio be the electrolyte block of 2.5-3 sealing covers the anode break joint and the centre joint as sealer, on electrolyte block, cover the scraps of paper again;
(5) be the sodium aluminum fluoride covering anode of 2.5-3 with molecular ratio, cover thickness is 10-25 centimetre.
Method of the present invention, owing to there is not impurity to bring in the electrolyte system, particularly the electrolyte block and the scraps of paper are as the sealing material of sealing anode break joint, the centre joint, loading furnace process uses the electrolyte block do not have any impurity of the enrichment materials such as alternative steel plate, asbestos plate and calcium silicate board that combine with newspaper, thereby fast quick-recovery newly starts the primary aluminum quality of electrolyzer, shortened the primary aluminum quality restore cycle greatly, about 10-15 days, can make the primary aluminum quality reach the requirement of conforming articls aluminium.A new electrolyzer that starts reaches 99.70A% 10-15 days primary aluminum quality in the production, with implement before reduced in comparison 10-15 days, save Master Cost effectively,, reduced the start-up cost of electrolyzer, economic benefit is obvious.
Embodiment
A kind of shove charge method of pre-calcining electrolytic cell is characterized in that its loading furnace process step comprises:
(1) pure after-smithing petroleum coke grain screening back is divided into the 0.2-1 millimeter by particle size, three ranks of 1-2 millimeter and 2-4 millimeter, be preheated to 100-300 ℃, be behind 50: 27: 23 the ratio uniform mixing then with these three kinds of rank particles according to weight ratio, the after-smithing petroleum coke grain is layed on the graphite cathode uniformly, and laying depth is 2 centimetres;
(2) anode is installed, the anode bottom is fully contacted with the after-smithing petroleum coke grain;
(3) limit portion is artificial is paved with Calcium Fluoride (Fluorspan) on stretching one's legs, and to protect artificial stretching one's legs, according to grooved, the laying amount is the 0.6---1.2 ton;
(4) select size to be respectively electrolyte block the covering one deck at upper surface and getting final product that 40-70 millimeter and 220-300 millimeter, molecular ratio are 2.5-3 as sealer sealing anode break joint, the centre joint, (centre joint and break joint all are hollow), cover the scraps of paper again on electrolyte block, the scraps of paper can adopt disregard message paper;
(5) be the sodium aluminum fluoride covering anode of 2.5-3 with molecular ratio, cover thickness is 10-25 centimetre.
Embodiment 1.
The 160KA electrolyzer is the loading furnace process before the wet start after overhaul
At first taking by weighing 450 kilograms of after-smithing petroleum coke grains is poured on the scorched particle bed, be divided into 0.5 millimeter, 1.2 millimeters and 2.3 millimeters three ranks according to particle size, be preheated to 220 ℃, and then be 50: 27: 23 ratio uniform mixing according to weight ratio, the after-smithing petroleum coke grain is layed on the graphite cathode uniformly.Anode is installed, is guaranteed that the anode bottom fully contacts with burnt grain.The artificial upper berth Calcium Fluoride (Fluorspan) 0.6t that stretches one's legs of limit portion.It is 2.6 electrolyte block that anode break joint, the centre joint adopt molecular ratio, according to the wide selection particle diameter of seam be the electrolyte block of 40-45 millimeter and 220-250 millimeter as overcover, cover electrolyte block with newspaper again; On overcover, lay weight ratio and be 3 tons of the compounds of 0.8: 1 sodium aluminum fluoride and soda ash.Be that 2.7 sodium aluminum fluoride covers with molecular ratio on the anode, seal up thickness 9cm.In 3 days shown in the primary aluminum quality following table, the time that quality reaches 99.70A% is 14 days behind the electrobath start.
Embodiment 2:
The 150KA electrolyzer is the loading furnace process before the wet start after overhaul.
At first taking by weighing 420-430 kilogram after-smithing petroleum coke grain is poured on the sieve plate, be divided into 0.5 millimeter, 2 millimeters and 3 millimeters three ranks according to particle size, be preheated to 250 ℃, and then be 50: 27: 23 ratio uniform mixing according to weight ratio, the after-smithing petroleum coke grain is layed on the graphite cathode uniformly.Anode is installed, is guaranteed that the anode bottom fully contacts with burnt grain.Limit portion is artificial stretch one's legs 0.6 ton in upper berth Calcium Fluoride (Fluorspan).It is 2.8 electrolyte block that anode break joint, the centre joint adopt molecular ratio, according to the wide selection particle diameter of seam be the electrolyte block of 45-50 millimeter and 225-270 millimeter as sealer, cover electrolyte block with newspaper again; Be that 2.8 sodium aluminum fluoride covers with molecular ratio on the anode, seal up thickness 20cm.In 3 days shown in the primary aluminum quality following table, be 15 days the time of recovery that quality reaches 99.70A% behind the electrobath start.
Embodiment 3.
The 300KA electrolyzer is the loading furnace process before the wet start after overhaul.
At first taking by weighing 700 kilograms of after-smithing petroleum coke grains is poured on the sieve plate, be divided into 1 millimeter, 2 millimeters and 4 millimeters three ranks according to particle size, be preheated to 250 ℃, and then be 50: 27: 23 ratio uniform mixing, the after-smithing petroleum coke grain is layed on the graphite cathode uniformly according to weight ratio.Anode is installed, is guaranteed that the anode bottom fully contacts with burnt grain.Limit portion is artificial stretch one's legs 1.2 tons in upper berth Calcium Fluoride (Fluorspan).It is 3.0 electrolyte block that anode break joint, the centre joint adopt molecular ratio, according to the wide selection particle diameter of seam be the electrolyte block of 50-70 millimeter and 280-300 millimeter as sealer, cover electrolyte block with newspaper again; Be that 3.0 sodium aluminum fluoride covers with molecular ratio on the anode, seal up thickness 18cm.Shown in the primary aluminum quality following table of electrobath start after 3 days, be 15 days the time of recovery that quality reaches 99.70A%.
Claims (1)
1. the shove charge method of a pre-calcining electrolytic cell is characterized in that its loading furnace process step comprises:
(1) pure after-smithing petroleum coke grain screening back is divided into the 0.2-1 millimeter by particle size, three ranks of 1-2 millimeter and 2-4 millimeter, be preheated to 100-300 ℃, be behind 50: 27: 23 the ratio uniform mixing, to be layed in the after-smithing petroleum coke grain on the graphite cathode uniformly then with these three kinds of rank particles according to weight ratio;
(2) anode is installed, the anode bottom is fully contacted with the after-smithing petroleum coke grain;
(3) limit portion is artificial is paved with Calcium Fluoride (Fluorspan) on stretching one's legs;
(4) select size be respectively 40-70 millimeter and 220-300 millimeter, molecular ratio be the electrolyte block of 2.5-3 sealing covers the anode break joint and the centre joint as sealer, on electrolyte block, cover the scraps of paper again;
(5) be the sodium aluminum fluoride covering anode of 2.5-3 with molecular ratio, cover thickness is 10-25 centimetre.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CNA2009100877440A CN101580948A (en) | 2009-06-24 | 2009-06-24 | Charging method for pre-baking aluminum electrolytic tank |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CNA2009100877440A CN101580948A (en) | 2009-06-24 | 2009-06-24 | Charging method for pre-baking aluminum electrolytic tank |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN101580948A true CN101580948A (en) | 2009-11-18 |
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|---|---|---|---|
| CNA2009100877440A Pending CN101580948A (en) | 2009-06-24 | 2009-06-24 | Charging method for pre-baking aluminum electrolytic tank |
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Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102260886A (en) * | 2011-07-09 | 2011-11-30 | 中国铝业股份有限公司 | Method for starting electrolytic tank with low voltage |
| CN103510110A (en) * | 2013-09-10 | 2014-01-15 | 河南中孚实业股份有限公司 | Aluminum electrolytic tank full-cavity furnace loading method |
| CN110637106A (en) * | 2017-04-10 | 2019-12-31 | 法孚斯埃克尔公司 | Method for installing an anode cover in an electrolytic cell, working machine capable of implementing the method and computer program product for the implementation of the method |
-
2009
- 2009-06-24 CN CNA2009100877440A patent/CN101580948A/en active Pending
Cited By (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102260886A (en) * | 2011-07-09 | 2011-11-30 | 中国铝业股份有限公司 | Method for starting electrolytic tank with low voltage |
| CN103510110A (en) * | 2013-09-10 | 2014-01-15 | 河南中孚实业股份有限公司 | Aluminum electrolytic tank full-cavity furnace loading method |
| CN110637106A (en) * | 2017-04-10 | 2019-12-31 | 法孚斯埃克尔公司 | Method for installing an anode cover in an electrolytic cell, working machine capable of implementing the method and computer program product for the implementation of the method |
| CN110637106B (en) * | 2017-04-10 | 2022-04-05 | 法孚斯埃克尔公司 | Method for installing an anode cover in an electrolytic cell, working machine capable of implementing the method and computer program product for the implementation of the method |
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Open date: 20091118 |