CN100523307C - Furnace charging method for aluminum electrolytic bath - Google Patents
Furnace charging method for aluminum electrolytic bath Download PDFInfo
- Publication number
- CN100523307C CN100523307C CNB2006100987023A CN200610098702A CN100523307C CN 100523307 C CN100523307 C CN 100523307C CN B2006100987023 A CNB2006100987023 A CN B2006100987023A CN 200610098702 A CN200610098702 A CN 200610098702A CN 100523307 C CN100523307 C CN 100523307C
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- Prior art keywords
- electrolyte powder
- furnace
- charging method
- naf
- electrolytic bath
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- 238000000034 method Methods 0.000 title claims abstract description 25
- 229910052782 aluminium Inorganic materials 0.000 title claims abstract description 15
- XAGFODPZIPBFFR-UHFFFAOYSA-N aluminium Chemical compound [Al] XAGFODPZIPBFFR-UHFFFAOYSA-N 0.000 title claims abstract description 14
- CDBYLPFSWZWCQE-UHFFFAOYSA-L Sodium Carbonate Chemical compound [Na+].[Na+].[O-]C([O-])=O CDBYLPFSWZWCQE-UHFFFAOYSA-L 0.000 claims abstract description 31
- 239000003792 electrolyte Substances 0.000 claims abstract description 30
- 239000000843 powder Substances 0.000 claims abstract description 27
- 229910000029 sodium carbonate Inorganic materials 0.000 claims description 15
- 235000017550 sodium carbonate Nutrition 0.000 claims description 15
- 239000000203 mixture Substances 0.000 claims description 4
- 239000004411 aluminium Substances 0.000 abstract description 3
- 238000003912 environmental pollution Methods 0.000 abstract description 2
- 229910004261 CaF 2 Inorganic materials 0.000 abstract 1
- AZDRQVAHHNSJOQ-UHFFFAOYSA-N alumane Chemical compound [AlH3] AZDRQVAHHNSJOQ-UHFFFAOYSA-N 0.000 abstract 1
- 229910001610 cryolite Inorganic materials 0.000 abstract 1
- 238000002156 mixing Methods 0.000 abstract 1
- -1 sodium aluminum fluoride Chemical compound 0.000 description 6
- 239000000463 material Substances 0.000 description 4
- 238000004519 manufacturing process Methods 0.000 description 3
- 239000008151 electrolyte solution Substances 0.000 description 2
- 239000002245 particle Substances 0.000 description 2
- 230000015572 biosynthetic process Effects 0.000 description 1
- 230000007423 decrease Effects 0.000 description 1
- 230000007812 deficiency Effects 0.000 description 1
- 230000000694 effects Effects 0.000 description 1
- 238000005265 energy consumption Methods 0.000 description 1
- 238000005516 engineering process Methods 0.000 description 1
- 150000004673 fluoride salts Chemical class 0.000 description 1
- 239000004615 ingredient Substances 0.000 description 1
- 238000012856 packing Methods 0.000 description 1
- 230000001737 promoting effect Effects 0.000 description 1
- 239000002699 waste material Substances 0.000 description 1
Abstract
A aluminium cell charging method relates to adopting electrolytic method producing metallic aluminium. It features in advance loading CaF 2, NaF, electrolyte powder and soda blending, then using electrolyte powder covering furnace burdening surface and anode centre seam, finally using electrolyte powder covering anode surface. Said invented method effectively reduces cryolite usage and volatilization loss, and environmental pollution.
Description
Technical field
A kind of furnace charging method for aluminum electrolytic bath relates to a kind of method that adopts electrolytic process to produce metallic aluminium.
Background technology
In the process of electrolytic production of aluminum, during electrobath start, in the electrolyzer of material being packed into.At present, general shove charge method is to adorn CaF earlier
2, refill NaF, adorn sodium aluminum fluoride at last and cover the furnace burdening surface and the anode centre joint.This mode consumes a large amount of sodium aluminum fluorides, simultaneously, after new groove starts, along with the continuous decline of voltage, take out a large amount of electrolyte solution pieces again, make the consumption of sodium aluminum fluoride be transformed into electrolyte block again, electric energy loss and fluoride salt volatilization loss have been increased, increased staff labor intensity and, increased the stacking amount of electrolyte block, influenced the balance of material and the balance of energy the pollution of environment.And new some composition of groove ionogen exists irrational big gap with normal groove.
Summary of the invention
Purpose of the present invention is exactly the deficiency that exists at above-mentioned prior art, and a kind of furnace charging method for aluminum electrolytic bath that can effectively reduce the sodium aluminum fluoride consumption is provided.
The objective of the invention is existing by the following technical programs.
A kind of furnace charging method for aluminum electrolytic bath is characterized in that loading furnace process is followed successively by: adorn CaF earlier
2, refill NaF, electrolyte powder and soda ash miscellany, cover the furnace burdening surface and the anode centre joint with electrolyte powder then, cover anode surface with electrolyte powder at last.
A kind of furnace charging method for aluminum electrolytic bath of the present invention is characterized in that the CaF that packs into
2Amount be 0.4-2t, the amount of the NaF that packs into is 0.5-5t, the weight of electrolyte powder and soda ash miscellany is 3.5-13t, covers the furnace burdening surface and the anode centre joint with the 2-7t electrolyte powder then.
A kind of furnace charging method for aluminum electrolytic bath of the present invention, the weight ratio of mixture that it is characterized in that electrolyte powder and soda ash miscellany is to start up NaF and AlF with new groove
3Mol ratio be that the molecular ratio of 2.9-3 is that target value calculates.
A kind of furnace charging method for aluminum electrolytic bath of the present invention is characterized in that covering anode surface, thickness 40-240mm with electrolyte powder.
Method of the present invention, the soda ash of when shove charge, packing into.The effect of dress soda ash is: start desired molecular ratio because the molecular ratio of electrolyte powder is lower than new groove, for the molecular ratio that promotes furnace burdening adds soda ash, good basis is established by group for the firm stove of material balance, energy balance and formation.
Method of the present invention, effectively reduce the sodium aluminum fluoride consumption, reduced and got the energy consumption that electrolyte solution is taken away, reduced sodium aluminum fluoride volatilization loss, reduced environmental pollution, reduce staff labor intensity, reduced startup groove cost, reduced the overstocked waste of electrolyte block (powder), help improving material balance and energy balance, improve new groove electrolyte ingredient, made new groove keep some reasonable component of ordinary production groove, further stablized electrolyzer production.
Embodiment
A kind of furnace charging method for aluminum electrolytic bath, its loading furnace process is followed successively by: adorn CaF earlier
2, refill NaF, electrolyte powder (particle diameter is less than 1 centimeter) and soda ash miscellany, cover the furnace burdening surface and the anode centre joint with electrolyte powder at last; CaF packs into
2Amount be 0.4-2t, the amount of the NaF that packs into is 0.5-5t, the weight of electrolyte powder and soda ash miscellany is 3.5-13t, covers the furnace burdening surface and the anode centre joint with the 2-7t electrolyte powder at last.The weight ratio of mixture of electrolyte powder and soda ash miscellany is to start up molecular ratio (NaF and AlF with new groove
3Mol ratio) to reach 2.9-3 be that target value calculates.Cover anode surface with electrolyte powder, thickness 40-240mm.
Embodiment 1
On the 85kA electrolyzer, adorn 0.5 ton of CaF earlier
2, refill 1.5 tons of NaF and about 3 tons electrolyte powder (particle diameter is less than 1 centimeter), 0.5 ton soda ash miscellany, cover furnace burdening surface, anode upper surface (40-50mm is thick) and the anode centre joint with about 2 tons electrolyte powder at last.The soda ash of adorning 0.5 ton is: because the molecular ratio of electrolyte powder is about 2.4, and new groove to start up desired molecular ratio be about 3, for promoting the molecular ratio of furnace burdening,, need add soda ash 468.75kg according to calculating.The wet method effect-less starting is carried out in energising.Electrical roasting voltage: 24 hours is 2.26v, and 48 hours is 2.15v, and 72 hours is 2.09v, and 96 hours is 2.06v.Before the startup, maturing temperature is 910 ℃, starts in back three days to survey molecular ratio continuously and be: 2.96,2.92,2.93, and roasting and start respond wellly operates steadily, and the shove charge method is effective.
Claims (2)
1. a furnace charging method for aluminum electrolytic bath is characterized in that loading furnace process is followed successively by: adorn CaF earlier
2, refill NaF, electrolyte powder and soda ash miscellany, cover the furnace burdening surface and the anode centre joint with electrolyte powder at last; Its CaF that packs into
2Amount be 0.4-2t, the amount of the NaF that packs into is 0.5-5t, the weight of electrolyte powder and soda ash miscellany is 3.5-13t, covers the furnace burdening surface and the anode centre joint with the 2-7t electrolyte powder at last; Cover anode surface with electrolyte powder, thickness is 40-240mm.
2. a kind of furnace charging method for aluminum electrolytic bath according to claim 1, the weight ratio of mixture that it is characterized in that electrolyte powder and soda ash miscellany are NaF and AlF when starting up with new groove
3Mol ratio be that the molecular ratio of 2.9-3 is that target value calculates.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CNB2006100987023A CN100523307C (en) | 2006-07-06 | 2006-07-06 | Furnace charging method for aluminum electrolytic bath |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CNB2006100987023A CN100523307C (en) | 2006-07-06 | 2006-07-06 | Furnace charging method for aluminum electrolytic bath |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN1900370A CN1900370A (en) | 2007-01-24 |
| CN100523307C true CN100523307C (en) | 2009-08-05 |
Family
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Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CNB2006100987023A Expired - Fee Related CN100523307C (en) | 2006-07-06 | 2006-07-06 | Furnace charging method for aluminum electrolytic bath |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN100523307C (en) |
Families Citing this family (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN101240431B (en) * | 2007-11-10 | 2010-09-08 | 山东南山铝业股份有限公司 | Aluminum hydroelectric bath total electrolyte roasting method |
| CA2741112A1 (en) * | 2011-05-25 | 2012-11-25 | Rio Tinto Alcan International Inc. | Dry cell start-up of an electrolytic cell for aluminium production |
| CN102400176B (en) * | 2011-11-18 | 2014-03-12 | 沁阳沁澳铝业有限公司 | Furnace charging method for prebaked aluminum electrolysis cell heterogenous cathode start |
| CN111020636A (en) * | 2019-12-26 | 2020-04-17 | 山西中铝华润有限公司 | Roasting starting charging method for 500KA aluminum electrolytic cell |
Citations (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US3919058A (en) * | 1973-05-14 | 1975-11-11 | Graenges Essem Ab | Aluminum furnace charging methods |
| CN1067456A (en) * | 1991-05-31 | 1992-12-30 | 云南铝厂 | The roasting method of self-baked aluminum cell |
| CN1250113A (en) * | 1999-09-24 | 2000-04-12 | 平果铝业公司 | Coke grain roast starting method for aluminium electrolyzer with pre-roasted anode |
-
2006
- 2006-07-06 CN CNB2006100987023A patent/CN100523307C/en not_active Expired - Fee Related
Patent Citations (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US3919058A (en) * | 1973-05-14 | 1975-11-11 | Graenges Essem Ab | Aluminum furnace charging methods |
| CN1067456A (en) * | 1991-05-31 | 1992-12-30 | 云南铝厂 | The roasting method of self-baked aluminum cell |
| CN1250113A (en) * | 1999-09-24 | 2000-04-12 | 平果铝业公司 | Coke grain roast starting method for aluminium electrolyzer with pre-roasted anode |
Non-Patent Citations (4)
| Title |
|---|
| 230kA大型预焙槽石墨粉启动的实践. 郭大瑞，郭兴.有色金属（冶炼部分），第3期. 2005 |
| 230kA大型预焙槽石墨粉启动的实践. 郭大瑞，郭兴.有色金属（冶炼部分），第3期. 2005 * |
| 82kA中间点式下料预焙槽铝液焙烧及启动方法的改进. 程军，罗锐，胡跃文，邓安斌，南瑞强.轻金属，第2期. 2002 |
| 82kA中间点式下料预焙槽铝液焙烧及启动方法的改进. 程军，罗锐，胡跃文，邓安斌，南瑞强.轻金属，第2期. 2002 * |
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| Publication number | Publication date |
|---|---|
| CN1900370A (en) | 2007-01-24 |
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