CN101270482A - Starting method for aluminum cell - Google Patents
Starting method for aluminum cell Download PDFInfo
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- CN101270482A CN101270482A CNA200710087240XA CN200710087240A CN101270482A CN 101270482 A CN101270482 A CN 101270482A CN A200710087240X A CNA200710087240X A CN A200710087240XA CN 200710087240 A CN200710087240 A CN 200710087240A CN 101270482 A CN101270482 A CN 101270482A
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- shove charge
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Abstract
A starting method for an aluminum electrobath relates to aluminum electrobath starting, in particular to a large starting method which includes being charged into a furnace, baking and starting process. The method is characterized in that: a, the material components which are added when being charged into the furnace are 7 to 8 percent of added calcined soda, 9 to 10 percent of calcium fluoride, 5 to 6 percent of magnesium fluoride, 19 to 20 percent of electrolyte blocks and the rest percent of high molecular ratio cryolite; b, the starting process is to add the high molecular ratio cryolite with an amount of 3 to 4 times as that of the high molecular ratio cryolite used for being charged into the furnace in the electrobath, to add the calcium fluoride with an amount of 19 to 20 percent of that of the calcium fluoride used for being charged into the furnace, to add the magnesium fluoride with an amount of 32 to 34 percent of that of the magnesium fluoride used for being charged into the furnace, to add the calcined soda with an amount of 23 to 25 percent of that of the calcined soda used for being charged into the furnace and to add the electrolyte blocks with an amount of 1.4 to 1.6 times as that of the electrolyte blocks used for being charged into the furnace. The method of the invention adopts the high molecular ratio cryolite and reduces the amount of the calcined soda, thus being able to lead the molecular ratio to be more than 2.8 after starting the electrobath, 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, Aluminium 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, need when electrolyzer tankage and startup, manually to add a large amount of solid soda ash, compare more than 2.8 to improve 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 at 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 be achieved through the following technical solutions.
A kind of startup method of aluminium cell comprises shove charge, roasting, start-up course, it is characterized in that:
A. loading furnace process is at first to be close to anodic bottom edge interpolation cryolite with high molecular ratio from around the groove thorax, on artificial stretching one's legs, evenly spread Calcium Fluoride (Fluorspan) then, on Calcium Fluoride (Fluorspan), evenly add magnesium fluoride, evenly add soda ash near the anode periphery, on sodium aluminum fluoride, adorn electrolyte block again near side wall carbon block, wherein the soda ash of Tian Jiaing 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 magnesium fluoride that adds accounts for the 5%-6% of shove charge gross weight, the electrolyte block that adds 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 to start after adding polymeric matte spar, Calcium Fluoride (Fluorspan), magnesium fluoride, soda ash and electrolyte block again in electrolyzer after the roasting, 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 magnesium fluoride is shove charge with 32%-34%, the soda ash of magnesium fluoride weight is the 23%-25% of shove charge with soda ash weight.
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, stopped up the passage that oozes under the aluminium liquid effectively, remedied the defective of cathode inner lining, also solved simultaneously when using the common ice spar and need add the sodium concentration of local that a large amount of soda ash cause, negative electrode is inhaled the sodium inequality, the na expansion stress concentration, 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 high-melting-point, 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 be close to anodic bottom edge interpolation cryolite with high molecular ratio from around the groove thorax, on artificial stretching one's legs, evenly spread Calcium Fluoride (Fluorspan) then, on Calcium Fluoride (Fluorspan), evenly add magnesium fluoride, evenly add soda ash near the anode periphery, on sodium aluminum fluoride, adorn electrolyte block again near side wall carbon block, wherein the soda ash of Tian Jiaing 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 magnesium fluoride that adds accounts for the 5%-6% of shove charge gross weight, the electrolyte block that adds 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 to start after adding polymeric matte spar, Calcium Fluoride (Fluorspan), magnesium fluoride, soda ash and electrolyte block again in electrolyzer after the roasting, 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 magnesium fluoride is shove charge with 32%-34%, the soda ash of magnesium fluoride weight is the 23%-25% of shove charge with soda ash weight.
Embodiment 1
With the 300KA electrolyzer is example, during 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 6.3 tons of thick cryolite with high molecular ratio from, on artificial stretching one's legs, evenly spread 0.9 ton Calcium Fluoride (Fluorspan) then, even 0.5 ton of the magnesium fluoride that adds evenly adds 0.7 ton of soda ash near the anode periphery on Calcium Fluoride (Fluorspan), adorns 2 tons of electrolyte blocks near side wall carbon block again on sodium aluminum fluoride; 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 magnesium fluoride, 0.16 ton of soda ash and 2.8 tons of electrolyte blocks.
Embodiment 2
With the 300KA electrolyzer is example, during 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, even 0.6 ton of the magnesium fluoride that adds evenly adds 0.8 ton of soda ash near the anode periphery on Calcium Fluoride (Fluorspan), adorns 2 tons of electrolyte blocks near side wall carbon block again on sodium aluminum fluoride; 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 magnesium fluoride, 0.2 ton of soda ash and 3.2 tons of electrolyte blocks.
Embodiment 3
With the 300KA electrolyzer is example, during 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, even 0.5 ton of the magnesium fluoride that adds evenly adds 0.8 ton of soda ash near the anode periphery on Calcium Fluoride (Fluorspan), adorns electrolyte block 2T near side wall carbon block again on sodium aluminum fluoride; 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 magnesium fluoride, 0.19 ton of soda ash and 3 tons of electrolyte blocks.
Claims (1)
- A kind of startup method of aluminium cell comprises shove charge, roasting, start-up course, it is characterized in that:A. loading furnace process is at first to be close to anodic bottom edge interpolation cryolite with high molecular ratio from around the groove thorax, on artificial stretching one's legs, evenly spread Calcium Fluoride (Fluorspan) then, on Calcium Fluoride (Fluorspan), evenly add magnesium fluoride, evenly add soda ash near the anode periphery, on sodium aluminum fluoride, adorn electrolyte block again near side wall carbon block, wherein the soda ash of Tian Jiaing 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 magnesium fluoride that adds accounts for the 5%-6% of shove charge gross weight, the electrolyte block that adds 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 to start after adding polymeric matte spar, Calcium Fluoride (Fluorspan), magnesium fluoride, soda ash and electrolyte block again in electrolyzer after the roasting, 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 magnesium fluoride is shove charge with 32%-34%, the soda ash of magnesium fluoride weight is the 23%-25% of shove charge with soda ash weight.
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 true CN101270482A (en) | 2008-09-24 |
| CN101270482B CN101270482B (en) | 2012-05-30 |
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| Application Number | Title | Priority Date | Filing Date |
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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 (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102230187A (en) * | 2011-08-04 | 2011-11-02 | 中国铝业股份有限公司 | Baking start-up method of drained-style aluminum electrolysis cell |
| 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 |
| 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 |
Families Citing this family (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| 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 |
Family Cites Families (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 |
| CN1032660C (en) * | 1993-07-27 | 1996-08-28 | 云南铝厂 | Casting, roasting and starting technique for self-roasting tank of Al electrolysis |
| 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 |
| CN100491598C (en) * | 2006-01-16 | 2009-05-27 | 中国铝业股份有限公司 | Starting method of aluminum electrolytic bath |
-
2007
- 2007-03-22 CN CN200710087240XA patent/CN101270482B/en not_active Expired - Fee Related
Cited By (5)
| 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 |
| CN102230187A (en) * | 2011-08-04 | 2011-11-02 | 中国铝业股份有限公司 | Baking start-up method of drained-style aluminum electrolysis cell |
| 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 |
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| CN101270482B (en) | 2012-05-30 |
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Granted publication date: 20120530 Termination date: 20140322 |