CN101270482B - Starting method for aluminum cell - Google Patents
Starting method for aluminum cell Download PDFInfo
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- CN101270482B CN101270482B CN200710087240XA CN200710087240A CN101270482B CN 101270482 B CN101270482 B CN 101270482B CN 200710087240X A CN200710087240X A CN 200710087240XA CN 200710087240 A CN200710087240 A CN 200710087240A CN 101270482 B CN101270482 B CN 101270482B
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Abstract
A starting method for an aluminum electrobath relates to an aluminum electrobath starting process, and is characterized in that in the 300KA eletrobath, after coke particles are paved and the pole is hung, firstly an upper side and a side of an anode interpolar gap are plugged by a paperboard, then high molecular ratio cryolite is added to a bottom metacarpal edge clinging to the anode at the periphery of a cell, calcium fluoride is uniformly paved on an artificial leg, magnesium fluoride is uniformly added on the calcium fluoride, then an electrolyte block is charged on the cryolite abutting a side carbon block; after starting the high molecular ratio cryolite, the calcium fluoride, the magnesium fluoride, soda and the electrolyte block are added too, after roasting, the high molecular ratio cryolite, the calcium fluoride, the magnesium fluoride, the soda and the electrolyte block are added in to electrobath, and then the electrobath is started. The method of the invention adopts the high molecular ratio cryolite and reduces the amount of the soda, so that the molecular ratio is more than 2.8 after the electrobath is started, thereby improving the stability of the technique technology conditions and reducing the working intensity of workers.
Description
Technical field
A kind of startup method of aluminium cell relates to a kind of starting aluminium cell, the startup method of particularly large-scale aluminium cell.
Background technology
Sodium aluminum fluoride-alumina molten salt electrolysis method is the method for current industrial production aluminium, can not be substituted at short notice as the sodium aluminum fluoride of flux.For a long time, aluminum electrolysis is used the roasting and starting that molecular ratio is newly slotted as the common molecular ratio sodium aluminum fluoride of 2.1-2.3.For guaranteeing that new groove roasting can reach enough temperature, after startup, can set up dystectic, regular stove group, a large amount of solid soda ash is added in manual work in the time of need and starting at the electrolyzer tankage, compares more than 2.8 with the raising electrolyte molecule; And too much the interpolation of soda ash causes the soda ash concentration of local easily, makes the local absorption sodium of carbon anode/cathode excessive, and cathode lining of electrolytic bath is had a negative impact; And the interpolation of soda ash will further increase the loss and the working strength of workers of sodium aluminum fluoride, also can bring safety hazard and environmental pollution.
Summary of the invention
The objective of the invention is deficiency, provide a kind of negative electrode suction sodium that can make even, help the prolongation of cell life to above-mentioned prior art existence; Reduce supplies consumption simultaneously, reduce labor strength, improve environment, reduce production costs, satisfy the startup method of the electrolyzer of electrolysis process requirement better.
The objective of the invention is to realize through following technical scheme.
A kind of startup method of aluminium cell comprises shove charge, roasting, start-up course, it is characterized in that:
A. electrolyzer is 300KA; After the burnt grain of laying, the extension utmost point finish, at first the anode interpolar is sewed on face and side shutoff during shove charge, then be close to anodic bottom edge all around and add 6.3 tons of thick cryolite with high molecular ratio from the groove thorax with cardboard; On artificial stretching one's legs, evenly spread 0.9 ton Calcium Fluoride (Fluorspan) then; Even 0.5 ton of the Sellaite that adds evenly adds 0.7 ton of soda ash near the anode periphery on Calcium Fluoride (Fluorspan), on sodium aluminum fluoride, adorns 2 tons of electrolyte blocks near side wall carbon block again; Add 19 tons of cryolite with high molecular ratio from after the startup again, 0.17 ton of Calcium Fluoride (Fluorspan), 0.16 ton of Sellaite, 0.16 ton of soda ash and 2.8 tons of electrolyte blocks;
B. start-up course is after in electrolyzer, adding polymeric matte spar, Calcium Fluoride (Fluorspan), Sellaite, soda ash and electrolyte block again after the roasting, to start; Wherein in the start-up course; The cryolite with high molecular ratio from weight of adding is shove charge 3-4 times with polymeric matte spar weight; Electrolyte block is shove charge 1.4-1.6 times with electrolyte block weight; Calcium Fluoride (Fluorspan) is the 19%-20% of the Calcium Fluoride (Fluorspan) weight used of shove charge, and Sellaite is that 32%-34%, the soda ash that Sellaite weight is used in shove charge is the 23%-25% of shove charge with soda ash weight.
The startup method of a kind of aluminium cell of the present invention; When it is characterized in that shove charge after laying burnt grain, hanging the utmost point and finish; At first the anode interpolar is sewed on face and side shutoff with cardboard; Then around the groove thorax, be close to anodic bottom edge and add 5.8 tons of thick cryolite with high molecular ratio from, on artificial stretching one's legs, evenly spread 1.2 tons Calcium Fluoride (Fluorspan) then, on Calcium Fluoride (Fluorspan), evenly add 0.6 ton of Sellaite; Evenly add 0.8 ton of soda ash near the anode periphery, on sodium aluminum fluoride, adorn 2 tons of electrolyte blocks again near side wall carbon block; Add 17.4 tons of cryolite with high molecular ratio from after the startup again, 0.24 ton of Calcium Fluoride (Fluorspan), 0.2 ton of Sellaite, 0.2 ton of soda ash and 3.2 tons of electrolyte blocks.
The startup method of a kind of aluminium cell of the present invention; When it is characterized in that shove charge after laying burnt grain, hanging the utmost point and finish; At first the anode interpolar is sewed on face and side shutoff with cardboard; Then around the groove thorax, be close to anodic bottom edge and add 6 tons of thick cryolite with high molecular ratio from, on artificial stretching one's legs, evenly spread 1.1 tons Calcium Fluoride (Fluorspan) then, on Calcium Fluoride (Fluorspan), evenly add 0.5 ton of Sellaite; Evenly add 0.8 ton of soda ash near the anode periphery, on sodium aluminum fluoride, adorn electrolyte block 2T again near side wall carbon block; Add 21 tons of cryolite with high molecular ratio from after the startup again, 0.2 ton of Calcium Fluoride (Fluorspan), 0.13 ton of Sellaite, 0.19 ton of soda ash and 3 tons of electrolyte blocks.Method of the present invention adopts cryolite with high molecular ratio from, reduces and adds the soda ash amount, can make electrobath start after molecular ratio more than 2.8, improved the stability of technology condition, reduced working strength of workers.
When method of the present invention is roasting and starting aluminum electrolytic cell; Use cryolite with high molecular ratio from, what the cathode inner lining slit was at first infiltrated is high molecule ratio, dystectic electrolyte melt, during electrolysis temperature after the startup reduces; The ionogen filling liquid of high primary crystal point is solidified gradually; Stop up the passage that oozes under the aluminium liquid effectively, remedied the defective of cathode inner lining, also solved sodium concentration of local, uneven, the na expansion stress concentration of negative electrode suction sodium that need add a large amount of soda ash when using the common ice spar and cause simultaneously; Thereby cause the cathode block non-homogeneous expansion even this key issue of cathode breakage takes place, for the prolongation of cell life is had laid a good foundation; Molecular ratio, electrolyte temperature change mild behind the electrobath start; Satisfied of the control requirement of new startup groove well to technical qualification; Effectively avoided adding the common ice spar and fluctuateed, for electrolyzer is set up HMP, regular burner hearth has been created advantageous conditions with the molecular ratio that a large amount of soda ash are caused; Thereby can reduce raw-material consumption in addition reduces production costs.
Embodiment
A kind of startup method of aluminium cell; Comprise shove charge, roasting, start-up course, wherein: a. loading furnace process is at first to add cryolite with high molecular ratio from being close to anodic bottom edge around the groove thorax, on artificial stretching one's legs, evenly spreads Calcium Fluoride (Fluorspan) then; On Calcium Fluoride (Fluorspan), evenly add Sellaite; Evenly add soda ash near the anode periphery, on sodium aluminum fluoride, adorn electrolyte block near side wall carbon block again, the soda ash that wherein adds accounts for the 7%-8% of shove charge material gross weight; The Calcium Fluoride (Fluorspan) that adds accounts for the 9%-10% of shove charge material gross weight; The Sellaite that adds accounts for the 5%-6% of shove charge gross weight, and the electrolyte block of interpolation is the 19%-20% of shove charge gross weight, and all the other are cryolite with high molecular ratio from; B. start-up course is after in electrolyzer, adding polymeric matte spar, Calcium Fluoride (Fluorspan), Sellaite, soda ash and electrolyte block again after the roasting, to start; Wherein in the start-up course; The cryolite with high molecular ratio from weight of adding is shove charge 3-4 times with polymeric matte spar weight; Electrolyte block is shove charge 1.4-1.6 times with electrolyte weight; Calcium Fluoride (Fluorspan) is the 19%-20% of the Calcium Fluoride (Fluorspan) weight used of shove charge, and Sellaite is that 32%-34%, the soda ash that Sellaite weight is used in shove charge is the 23%-25% of shove charge with soda ash weight.
Embodiment 1
With the 300KA electrolyzer is example; After the burnt grain of laying, the extension utmost point finish, at first the anode interpolar is sewed on face and side shutoff during shove charge, then be close to anodic bottom edge all around and add 6.3 tons of thick cryolite with high molecular ratio from the groove thorax with cardboard; On artificial stretching one's legs, evenly spread 0.9 ton Calcium Fluoride (Fluorspan) then; Even 0.5 ton of the Sellaite that adds evenly adds 0.7 ton of soda ash near the anode periphery on Calcium Fluoride (Fluorspan), on sodium aluminum fluoride, adorns 2 tons of electrolyte blocks near side wall carbon block again; Add 19 tons of cryolite with high molecular ratio from after the startup again, 0.17 ton of Calcium Fluoride (Fluorspan), 0.16 ton of Sellaite, 0.16 ton of soda ash and 2.8 tons of electrolyte blocks.
Embodiment 2
With the 300KA electrolyzer is example; After the burnt grain of laying, the extension utmost point finish, at first the anode interpolar is sewed on face and side shutoff during shove charge, then be close to anodic bottom edge all around and add 5.8 tons of thick cryolite with high molecular ratio from the groove thorax with cardboard; On artificial stretching one's legs, evenly spread 1.2 tons Calcium Fluoride (Fluorspan) then; Even 0.6 ton of the Sellaite that adds evenly adds 0.8 ton of soda ash near the anode periphery on Calcium Fluoride (Fluorspan), on sodium aluminum fluoride, adorns 2 tons of electrolyte blocks near side wall carbon block again; Add 17.4 tons of cryolite with high molecular ratio from after the startup again, 0.24 ton of Calcium Fluoride (Fluorspan), 0.2 ton of Sellaite, 0.2 ton of soda ash and 3.2 tons of electrolyte blocks.
Embodiment 3
With the 300KA electrolyzer is example; After the burnt grain of laying, the extension utmost point finish, at first the anode interpolar is sewed on face and side shutoff during shove charge, then be close to anodic bottom edge all around and add 6 tons of thick cryolite with high molecular ratio from the groove thorax with cardboard; On artificial stretching one's legs, evenly spread 1.1 tons Calcium Fluoride (Fluorspan) then; Even 0.5 ton of the Sellaite that adds evenly adds 0.8 ton of soda ash near the anode periphery on Calcium Fluoride (Fluorspan), on sodium aluminum fluoride, adorns electrolyte block 2T near side wall carbon block again; Add 21 tons of cryolite with high molecular ratio from after the startup again, 0.2 ton of Calcium Fluoride (Fluorspan), 0.13 ton of Sellaite, 0.19 ton of soda ash and 3 tons of electrolyte blocks.
Claims (3)
1. the startup method of an aluminium cell comprises shove charge, roasting, start-up course, it is characterized in that:
A. electrolyzer is 300KA; After the burnt grain of laying, the extension utmost point finish, at first the anode interpolar is sewed on face and side shutoff during shove charge, then be close to anodic bottom edge all around and add 6.3 tons of thick cryolite with high molecular ratio from the groove thorax with cardboard; On artificial stretching one's legs, evenly spread 0.9 ton Calcium Fluoride (Fluorspan) then; Even 0.5 ton of the Sellaite that adds evenly adds 0.7 ton of soda ash near the anode periphery on Calcium Fluoride (Fluorspan), on sodium aluminum fluoride, adorns 2 tons of electrolyte blocks near side wall carbon block again; Add 19 tons of cryolite with high molecular ratio from after the startup again, 0.17 ton of Calcium Fluoride (Fluorspan), 0.16 ton of Sellaite, 0.16 ton of soda ash and 2.8 tons of electrolyte blocks;
B. start-up course is after in electrolyzer, adding polymeric matte spar, Calcium Fluoride (Fluorspan), Sellaite, soda ash and electrolyte block again after the roasting, to start; Wherein in the start-up course; The cryolite with high molecular ratio from weight of adding is shove charge 3-4 times with polymeric matte spar weight; Electrolyte block is shove charge 1.4-1.6 times with electrolyte block weight; Calcium Fluoride (Fluorspan) is the 19%-20% of the Calcium Fluoride (Fluorspan) weight used of shove charge, and Sellaite is that 32%-34%, the soda ash that Sellaite weight is used in shove charge is the 23%-25% of shove charge with soda ash weight.
2. based on the startup method of the described a kind of aluminium cell of claim 1; When it is characterized in that shove charge after laying burnt grain, hanging the utmost point and finish; At first the anode interpolar is sewed on face and side shutoff with cardboard; Then the bottom edge of around the groove thorax, being close to anode adds 5.8 tons of thick cryolite with high molecular ratio; On artificial stretching one's legs, evenly spread 1.2 tons calcirm-fluoride then; On calcirm-fluoride, evenly add 0.6 ton of magnesium fluoride; Evenly add 0.8 ton of soda ash near the anode periphery, on ice crystal, adorn 2 tons of electrolyte blocks again near side wall carbon block; Add 17.4 tons of cryolite with high molecular ratio after the startup again, 0.24 ton of calcirm-fluoride, 0.2 ton of magnesium fluoride, 0.2 ton of soda ash and 3.2 tons of electrolyte blocks.
3. based on the startup method of the described a kind of aluminium cell of claim 1; When it is characterized in that shove charge after laying burnt grain, hanging the utmost point and finish; At first the anode interpolar is sewed on face and side shutoff with cardboard; Then the bottom edge of around the groove thorax, being close to anode adds 6 tons of thick cryolite with high molecular ratio; On artificial stretching one's legs, evenly spread 1.1 tons calcirm-fluoride then; On calcirm-fluoride, evenly add 0.5 ton of magnesium fluoride; Evenly add 0.8 ton of soda ash near the anode periphery, on ice crystal, adorn electrolyte block 2T again near side wall carbon block; Add 21 tons of cryolite with high molecular ratio after the startup again, 0.2 ton of calcirm-fluoride, 0.13 ton of magnesium fluoride, 0.19 ton of soda ash and 3 tons of electrolyte blocks.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN200710087240XA CN101270482B (en) | 2007-03-22 | 2007-03-22 | Starting method for aluminum cell |
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| CN200710087240XA CN101270482B (en) | 2007-03-22 | 2007-03-22 | Starting method for aluminum cell |
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| CN101270482A CN101270482A (en) | 2008-09-24 |
| CN101270482B true CN101270482B (en) | 2012-05-30 |
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| CN200710087240XA Expired - Fee Related CN101270482B (en) | 2007-03-22 | 2007-03-22 | Starting method for aluminum cell |
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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102995058A (en) * | 2012-12-06 | 2013-03-27 | 云南云铝涌鑫铝业有限公司 | Method for paving roasting medium in aluminum electrolysis cell and method for roasting lining |
Families Citing this family (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 |
| CN102230187B (en) * | 2011-08-04 | 2013-12-04 | 中国铝业股份有限公司 | Baking start-up method of drained-style aluminum electrolysis cell |
| 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 |
| 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 (7)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| SU1548268A1 (en) * | 1988-04-05 | 1990-03-07 | Саянский алюминиевый завод | Method of pre-start preparation of aluminium electrolyzer |
| SU1752829A1 (en) * | 1990-04-04 | 1992-08-07 | Иркутский алюминиевый завод | Method of starting aluminium electrolyzer after overhaul |
| CN1098147A (en) * | 1993-07-27 | 1995-02-01 | 云南铝厂 | The casting mold of self-baked aluminum cell, roasting, startup technology |
| RU2188256C1 (en) * | 2001-03-20 | 2002-08-27 | Открытое акционерное общество "Сибирско-Уральская алюминиевая компания" | Process of start of aluminum electrolyzer after overhaul |
| RU2194094C2 (en) * | 2001-01-30 | 2002-12-10 | Оао "Суал" | Method for starting aluminium cell |
| RU2255144C2 (en) * | 2003-04-16 | 2005-06-27 | Открытое акционерное общество "Сибирский научно-исследовательский, конструкторский и проектный институт алюминиевой и электродной промышленности" (ОАО "СибВАМИ") | Method for starting aluminum cell |
| CN1818142A (en) * | 2006-01-16 | 2006-08-16 | 中国铝业股份有限公司 | Starting method of aluminium electrolytic bath |
-
2007
- 2007-03-22 CN CN200710087240XA patent/CN101270482B/en not_active Expired - Fee Related
Patent Citations (7)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| SU1548268A1 (en) * | 1988-04-05 | 1990-03-07 | Саянский алюминиевый завод | Method of pre-start preparation of aluminium electrolyzer |
| SU1752829A1 (en) * | 1990-04-04 | 1992-08-07 | Иркутский алюминиевый завод | Method of starting aluminium electrolyzer after overhaul |
| CN1098147A (en) * | 1993-07-27 | 1995-02-01 | 云南铝厂 | The casting mold of self-baked aluminum cell, roasting, startup technology |
| RU2194094C2 (en) * | 2001-01-30 | 2002-12-10 | Оао "Суал" | Method for starting aluminium cell |
| RU2188256C1 (en) * | 2001-03-20 | 2002-08-27 | Открытое акционерное общество "Сибирско-Уральская алюминиевая компания" | Process of start of aluminum electrolyzer after overhaul |
| RU2255144C2 (en) * | 2003-04-16 | 2005-06-27 | Открытое акционерное общество "Сибирский научно-исследовательский, конструкторский и проектный институт алюминиевой и электродной промышленности" (ОАО "СибВАМИ") | Method for starting aluminum cell |
| CN1818142A (en) * | 2006-01-16 | 2006-08-16 | 中国铝业股份有限公司 | Starting method of aluminium electrolytic bath |
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102995058A (en) * | 2012-12-06 | 2013-03-27 | 云南云铝涌鑫铝业有限公司 | Method for paving roasting medium in aluminum electrolysis cell and method for roasting lining |
| CN102995058B (en) * | 2012-12-06 | 2015-06-17 | 云南云铝涌鑫铝业有限公司 | Method for paving roasting medium in aluminum electrolysis cell and method for roasting lining |
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| CN101270482A (en) | 2008-09-24 |
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