CN101713033B - Production technology for casting aluminum foil - Google Patents
Production technology for casting aluminum foil Download PDFInfo
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- CN101713033B CN101713033B CN200910229983A CN200910229983A CN101713033B CN 101713033 B CN101713033 B CN 101713033B CN 200910229983 A CN200910229983 A CN 200910229983A CN 200910229983 A CN200910229983 A CN 200910229983A CN 101713033 B CN101713033 B CN 101713033B
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Abstract
The invention relates to a production technology for casting an aluminum foil, and belongs to the technical field of the production technology for casting the aluminum foil. The production technology is characterized in that: in a burdening process, the control range and control accuracy of a No.1235 alloy are as follows: the aluminum foil is cast by the following components in percentage by mass: 0.07 to 0.09 percent of Si, 0.500 to 0.600 percent of Fe, less than or equal to 0.008 percent of Cu, less than or equal to 0.01 percent of Mn, less than or equal to 0.05 percent of Mg, less than or equal to 0.03 percent of Zn and 0.005 to 0.012 percent of Ti, and the ratio of Fe to Si is controlled to be between 6 and 8; in a smelting process, 50 to 70 percent of electrolytic aluminum liquid is added with 30 to 50 percent of solid material, which is one of a re-melting aluminum ingot, an aluminum ingot tip-cut tailing and a hot-rolled thick-plate tip-cut tailing; and a bottom electromagnetic stirring system is arranged in a smelting furnace. After the temperature of a charging material surpasses 740 DEG C, the electromagnetic stirring system is started to run for 20 to 60 minutes. Through the production technology for casting the aluminum foil, the formation of crude compounds is greatly reduced; no saline refining agent is used in the smelting process of a No.1235 alloy melt; and when the thickness of the obtained No.1235 alloy double-zero aluminum foil is less than or equal to 6.3 mu m, the porosity is between 500/m2 and 600/m2, which is far lower than the porosity of the aluminum foil with the same thickness produced by the traditional casting production technology.
Description
Technical field
The present invention relates to a kind of production technology for casting aluminum foil, particularly a kind of double-zero aluminum foil production technology for casting belongs to the production technology for casting aluminum foil technical field.
Background technology
At present, in producing DC (directly Quench) Foundry Production of double-zero aluminum foil with 1235 alloy hot rolling slab ingots, the common Si+Fe of traditional 1235 alloy aluminium foil materials compositions≤0.65%; Cu≤0.05%, Mn≤0.05%, Mg≤0.05%; Zn≤0.10%, Ti≤0.06%, Fe/Si=3-4 usually; Be prone in the ingot casting like this form thick needle-like β (FeSiAl) phase, make material be fragility, be unfavorable for follow-up rolling machining deformation.
During tradition 1235 alloy casting aluminum foils were produced, furnace refining adopted the salt refining agent to carry out melt degasification deslagging refining usually, and the use of this salt refining agent has all brought great harm for molten aluminium stove firing system, inner lining of furnace and surrounding enviroment; Tradition 1235 alloy casting aluminum foil productions are adopted aluminium titanium boron wire AL-5Ti-1B usually with the grain refining material, because boron content is high, are prone to form a large amount of thick borides, cause aluminum foil rolling to be prone to form pin hole; Its refinement silk addition ratio of traditional mode of production is generally 1.5-2.0Kg/t.AL simultaneously, and this addition is excessive, and the amount that causes thick boride to form also increases, thereby causes the aluminium foil pin hole to increase; In addition; Aspect the processing of melt in-line purification; Tradition 1235 double-zero aluminum foils adopt foamed ceramic filter plate single-stage melt filtration in producing with the ingot casting founding usually, and its melt filtration precision is: can filter 90% above size>=10 μ m granule foreigns; This such filtering accuracy of aluminium foil for height excellent 1235 double-zero aluminum foils, especially thickness≤6.3 μ m is not enough; In addition; Melt basic metal control Na≤10ppm during tradition 1235 alloy aluminium foils are produced with the ingot casting founding; Ca≤20ppm, the alkali metal content control accuracy is not high, and too high basic metal will have a strong impact on follow-up rolling processing characteristics; Be prone to broken belt in the aluminum foil rolling, thereby greatly reduce the aluminum foil rolling yield rate; In melt degree of cleaning context of detection; Main online detection melt hydrogen richness during tradition 1235 alloy casting aluminum foils are produced; And can't online detection melt slag content; Like this in actual production because of there not being the online detection of melt slag content just can't in time understand the melt filtering system operation conditions, thereby in the passive hysteresis that seems of this Quality Control Links.
Summary of the invention
The objective of the invention is to solve the weak point that above-mentioned prior art exists; Provide a kind of on traditional production technology for casting aluminum foil basis; Optimize from alloying constituent span of control and control accuracy thereof and to the production technology for casting route integration; Especially the online detection configuration of in-line treatment during 1235 double-zero aluminum foil foundings are produced and melt hydrogen richness and slag content design, effective production technology for casting aluminum foil that also greatly improves melt quality.
The present invention realizes through following technical scheme:
A kind of production technology for casting aluminum foil, its special character are in its technical process:
In blending process, optimization design 1235 alloying constituent span of control and control accuracies of the present invention improve Fe/Si; 1235 alloying constituent span of control after the optimization are: by mass percentage, and Si=0.07-0.09%, Fe=0.500-0.600%; Cu≤0.008%, Mn≤0.01%, Mg≤0.005%; Zn≤0.03%, Ti=0.005-0.012% controls Fe/Si=6-8 usually;
In fusion process; Adopt 50-70% ratio electrolytic aluminium liquid to add the proportion scheme of 30-50% solid material; Said solid material be remelting with aluminium ingot, ingot casting sawing expect end to end, a kind of in the hot-rolled thick plank crop tailing; In smelting furnace and holding furnace, all do not adopt any salt refining agent, thereby prevented of the pollution of salt refining agent effectively, effectively prevented the infringement of refining agent simultaneously yet the smelting furnace firing system to 1235 alloy melts; In addition, at smelting furnace configuration bottom type electromagnetic stirring system (EMS), after charge-temperature reaches more than 740 ℃, start electromagnetic stirring system 20-60 minute with quicken fusing, reach make that the alloy melt composition is even, melt temperature is even in the stove;
In refining process; The chlorine (according to volume percent) that in holding furnace, adopts the furnace bottom porous plug to feed 94-96% high pure nitrogen and 4-6% to 1235 alloy melts carries out furnace refining to alloy melt; The two chambers two rotors that is employed in the SNIF system afterwards again feeds the 99.4-99.6% high-purity argon gas mixes refining and process foamed ceramic filter plate+pipe filter double-stage filtering truly with the chlorine (according to volume percent) of 0.4-0.6% 1235 alloy melt in-line treatment schemes; 1235 alloy melt degree of cleaning have greatly been improved, 1235 alloy aluminium foils (≤6.3 μ m) pin hole rate≤600/m
2
Above-mentioned high pure nitrogen, high-purity argon gas refer to that all purity is greater than 99.995%;
In refinement silk adition process; Abandon traditional aluminium titanium boron wire AL-5Ti-1B; And adopting the grain refining material of aluminium titanium boron wire AL-5Ti-0.2B as 1235 alloy melts, the simultaneously strict addition of carrying out 0.8-1.2Kg/t.AL reduces the influence of boron to the double-zero aluminum foil pin hole effectively.
In addition; Except the online hydrogen richness detecting instrument of configuration melt; The present invention has also disposed melt slag content on-line detecting system, thereby can promptly and accurately quantize 1235 alloy melt degree of cleaning quality index, and guides the timely adjustment and the optimization of production technique; According to the production practice of long period, 1235 alloy melt degree of cleaning quality index are confirmed as:
Hydrogen richness (H
2) :≤0.12ml/100g.AL, slag content (LIMCA) :≤5.0K/Kg.AL.
A kind of production technology for casting aluminum foil of the present invention, it is less than normal to have overcome the Fe/Si that exists in traditional 1235 alloy casting aluminum foils production, and the alloying constituent span of control is too wide, and the defective that the Composition Control precision is low has greatly reduced the formation of thick compound; In the fusion process of 1235 alloy melts, do not adopt any salt refining agent; The 1235 alloy double-zero aluminum foils that obtain are when thickness≤6.3 μ m, and pin hole rate level is at 500-600/m
2, (the pin hole rate of thickness that traditional production technology for casting is produced≤6.3 μ m aluminium foils is at 1000-2000/m far below same thickness aluminium foil pin hole rate that traditional production technology for casting is produced
2).
Description of drawings
Fig. 1: production technology for casting aluminum foil schema.
Embodiment
Below provide the specific embodiment of the invention, the present invention is described further.
Embodiment 1
A kind of production technology for casting aluminum foil of present embodiment, technological process such as Fig. 1, operation is:
Batching, shove charge, melting, skim, alloying, stir, skim, take a sample, analysis, converter, furnace refining, skim, take a sample, analyze (adding of refinement silk), the online degasification refining of SNIF, CFF foam ceramic filter, MCF tubular filter, casting, check, warehouse-in
The 1235 alloying element span of control that this technology designs in blending process are: by mass percentage, and Si=0.07-0.09%, Fe=0.500-0.600%; Cu≤0.008%, Mn≤0.01%, Mg≤0.005%; Zn≤0.03%, Ti=0.005-0.012% controls Fe/Si=6-8 usually;
In fusion process; Adopt 50-70% ratio electrolytic aluminium liquid to add the proportion scheme of 30-50% solid material, the solid material be remelting with aluminium ingot, ingot casting sawing expect end to end, a kind of in the hot-rolled thick plank crop tailing, shove charge; The firing up fusing; In smelting furnace and holding furnace, all do not adopt any salt refining agent, thereby prevented of the pollution of salt refining agent effectively, effectively prevented the infringement of refining agent simultaneously yet the smelting furnace firing system to 1235 alloy melts; At smelting furnace configuration bottom type electromagnetic stirring system (EMS), after charge-temperature reaches more than 740 ℃, start electromagnetic stirring system and stirred 30 minutes; Opening fire door afterwards skims; In stove, add alloy addition (chalybeate) or master alloy (aluminium silicon master alloy) afterwards as required, once more stirring, temperature control, skim, stokehold sampling, analyze; Composition all meets mentioned component control requirement, and opening releases fills in melt converter in the smelting furnace to holding furnace;
Start furnace refining system (furnace bottom porous plug) at holding furnace and carry out 40-60 minute furnace refining; In holding furnace, skim, take a sample, analyze bath composition afterwards; Composition meets above-mentioned alloying constituent control requirement fully, controls the interior melt temperature of stove afterwards and prepares to start casting at 720-725 ℃.
Wait to cast preparation work all ready after, start casting, melt carries out further online degasification slagging-off and handles along the casting chute two chamber two rotors refine on line systems of SNIF that flow through in the holding furnace,
In refining process; The chlorine that in holding furnace, adopts the furnace bottom porous plug to feed according to volume percent 94-96% high pure nitrogen and 4-6% to 1235 alloy melts carries out furnace refining to alloy melt; The two chambers two rotors that is employed in the SNIF system afterwards again feeds according to volume percent 99.4-99.6% high-purity argon gas and the chlorine mixing refining of 0.4-0.6% and 1235 alloy melt in-line treatment of process foamed ceramic filter plate+pipe filter double-stage filtering, 1235 alloy aluminium foils (≤6.3 μ m) pin hole rate≤600/m
2High pure nitrogen, high-purity argon gas all refer to purity greater than 99.995%, and determine the feeding amount of gas as required by the stove amount size that feeds;
And be grain refining silk-aluminium titanium boron wire (AL-5Ti-0.2B) of 0.8-1.2Kg/t.AL at SNIF swivel nozzle rare gas element rectification systems inlet additional proportion; Melt-flow is carried out the processing of first step melt filtration through foam ceramic filter system (CFF) subsequently; Melt-flow is carried out second stage melt filtration processing once more through pipe filter afterwards, flows through afterwards and distributes chute entering mould casting to become 1235 double-zero aluminum foils to use flat ingot casting;
Except that the online hydrogen richness detecting instrument of configuration melt, configuration melt slag content on-line detecting system carries out hydrogen richness and slag content detection through online to melt, and the result is following: hydrogen richness detected result H
2: 0.09ml/100g.AL; LIMCA CM slag content detection result: 2.25K/Kg.AL, after hot rolling, cold rolling, aluminum foil rolling finished product 6.0 μ m, pin hole detected result: 300/m
2-400/m
2
A kind of production technology for casting aluminum foil of present embodiment, it is less than normal to have overcome the Fe/Si that exists in traditional 1235 alloy casting aluminum foils production, and the alloying constituent span of control is too wide, and the defective that the Composition Control precision is low has greatly reduced the formation of thick compound; In the fusion process of 1235 alloy melts, do not adopt any salt refining agent; The 1235 alloy double-zero aluminum foils that obtain are when thickness≤6.3 μ m, and pin hole rate level is at 500-600/m
2, (the pin hole rate of thickness that traditional production technology for casting is produced≤6.3 μ m aluminium foils is at 1000-2000/m far below same thickness aluminium foil pin hole rate that traditional production technology for casting is produced
2).
Claims (3)
1. casting aluminum foil working method is characterized in that:
In blending process, 1235 alloying constituent span of control and control accuracy are: by mass percentage, and Si=0.07-0.09%, Fe=0.500-0.600%; Cu≤0.008%, Mn≤0.01%, Mg≤0.005%; Zn≤0.03%, Ti=0.005-0.012%, surplus is an aluminium; Control Fe/Si=6-8;
In fusion process; Adopt 50-70% ratio electrolytic aluminium liquid to add the proportion scheme of 30-50% solid material; The solid material be remelting with aluminium ingot, ingot casting sawing expect end to end, a kind of in the hot-rolled thick plank crop tailing; At smelting furnace configuration bottom type electromagnetic stirring system, after charge-temperature reaches more than 740 ℃, start electromagnetic stirring system 20-60 minute;
In refining process; The chlorine that in holding furnace, adopts the furnace bottom porous plug to feed according to volume percent 94-96% high pure nitrogen and 4-6% to 1235 alloy melts carries out furnace refining to alloy melt; Afterwards again to 1235 alloy melt in-line treatment; Inlet in the SNIF system adds the refinement silk and adopts two chambers two rotors to feed according to the chlorine mixing refining of volume percent 99.4-99.6% high-purity argon gas with 0.4-0.6%; Carry out foamed ceramic filter plate+pipe filter double-stage filtering, after hot rolling, cold rolling thickness≤6.3 μ m, the pin hole rate≤600/m of obtaining
21235 alloy aluminium foils;
Refinement silk in the SNIF system is aluminium titanium boron wire AL-5Ti-0.2B, carries out the addition of 0.8-1.2Kg/tAL.
2. according to the said a kind of casting aluminum foil working method of claim 1, it is characterized in that:
Said high pure nitrogen, high-purity argon gas refer to that all purity is greater than 99.995%.
3. according to the said a kind of casting aluminum foil working method of claim 1, it is characterized in that:
Also dispose melt slag content on-line detecting system, 1235 alloy melt degree of cleaning quality index are confirmed as: hydrogen richness :≤0.12ml/100gAL, slag content :≤5.0K/KgAL.
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| CN200910229983A CN101713033B (en) | 2009-11-23 | 2009-11-23 | Production technology for casting aluminum foil |
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| CN200910229983A CN101713033B (en) | 2009-11-23 | 2009-11-23 | Production technology for casting aluminum foil |
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| CN102162051A (en) * | 2011-04-08 | 2011-08-24 | 中信戴卡轮毂制造股份有限公司 | Preparation technique of aluminum-silicon alloy |
| CN102847898B (en) * | 2011-07-01 | 2016-05-25 | 湖南创元铝业有限公司 | A kind of electrolytic aluminium liquid directly carries out the method for casting production |
| CN102994777A (en) * | 2012-12-28 | 2013-03-27 | 云南铝业股份有限公司 | Electrolytic aluminum liquid purification method for producing ultra-wide double-zero aluminum foil |
| CN103084805B (en) * | 2013-01-15 | 2016-09-07 | 洛阳龙鼎铝业有限公司 | A kind of 1235 double zero foil production process |
| CN104233020B (en) * | 2014-09-08 | 2016-04-06 | 南南铝业股份有限公司 | The purifying method of high-power radiator aluminium alloy and melt thereof |
| CN104388761B (en) * | 2014-10-30 | 2017-06-27 | 晟通科技集团有限公司 | Aluminum alloy materials and the method that double zero foil is manufactured with it |
| CN106119624A (en) * | 2016-08-25 | 2016-11-16 | 马鸿斌 | A kind of high heat conduction aluminum alloy and preparation method thereof |
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| CN106702174A (en) * | 2016-12-27 | 2017-05-24 | 西南铝业（集团）有限责任公司 | Aluminum alloy melt purifying device |
| CN107012414B (en) * | 2017-04-10 | 2018-06-26 | 滁州卷烟材料厂 | A kind of aluminium-foil paper with antistatic and anti-dust performance |
| CN110227714A (en) * | 2019-06-25 | 2019-09-13 | 江苏大亚铝业有限公司 | Lithium battery 1235 alloy double-face optical aluminum foils and preparation method thereof |
| CN111004939A (en) * | 2019-12-27 | 2020-04-14 | 西南铝业（集团）有限责任公司 | Molten aluminum deslagging method for 2014 aluminum alloy aviation precision hub die forging ingot casting |
| CN112760510B (en) * | 2020-12-28 | 2022-02-18 | 浙江永杰铝业有限公司 | Aluminum alloy strip and preparation method thereof |
| CN113106278A (en) * | 2021-04-13 | 2021-07-13 | 内蒙古联晟新能源材料有限公司 | Preparation method of welding liquid for aluminum alloy brazing production |
| CN114410997A (en) * | 2021-12-16 | 2022-04-29 | 内蒙古联晟新能源材料有限公司 | Production process of 1235A aluminum alloy foil |
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| JP2003229334A (en) * | 2002-02-04 | 2003-08-15 | Toyo Aluminium Kk | Aluminum foil for electrolytic capacitor |
| CN1850428A (en) * | 2006-04-29 | 2006-10-25 | 东北轻合金有限责任公司 | Method for manufacturing aluminium foil of high-voltage anode for electrolytic capacitor |
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Inventor after: Song Jianbo Inventor after: Jin Wuliang Inventor after: Qu Dabao Inventor after: Zhu Guoqing Inventor after: Chen Aisong Inventor after: Che Liang Inventor after: Song Changming Inventor after: Cheng Rence Inventor after: Lv Zhengfeng Inventor after: Liu Shiyu Inventor after: Sui Xinqin Inventor after: Meng Shuang Inventor after: Zhao Yingbin Inventor after: Yang Limin Inventor before: Song Jianbo Inventor before: Meng Shuang Inventor before: Zhao Yingbin Inventor before: Xia Ruichang Inventor before: Jin Wuliang Inventor before: Qu Dabao Inventor before: Song Changming Inventor before: Lv Zhengfeng Inventor before: Liu Shiyu Inventor before: Liu Shaoyu Inventor before: Sui Xinqin Inventor before: Wang Shangyuan Inventor before: Liu Runyi Inventor before: Guo Haiyan |