CN101037732A - On-line air-eliminating deslagging refining method of 3104 aluminum alloy flat ingot in casting furnace - Google Patents
On-line air-eliminating deslagging refining method of 3104 aluminum alloy flat ingot in casting furnace Download PDFInfo
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- CN101037732A CN101037732A CN 200710048986 CN200710048986A CN101037732A CN 101037732 A CN101037732 A CN 101037732A CN 200710048986 CN200710048986 CN 200710048986 CN 200710048986 A CN200710048986 A CN 200710048986A CN 101037732 A CN101037732 A CN 101037732A
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- gas
- degasification
- chute
- degassing
- refining method
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- 238000007670 refining Methods 0.000 title claims abstract description 30
- 238000000034 method Methods 0.000 title claims abstract description 26
- 229910000838 Al alloy Inorganic materials 0.000 title claims abstract description 22
- 238000005266 casting Methods 0.000 title abstract description 19
- 238000007872 degassing Methods 0.000 claims abstract description 85
- 239000007788 liquid Substances 0.000 claims abstract description 41
- 229910052782 aluminium Inorganic materials 0.000 claims abstract description 23
- XAGFODPZIPBFFR-UHFFFAOYSA-N aluminium Chemical compound [Al] XAGFODPZIPBFFR-UHFFFAOYSA-N 0.000 claims abstract description 23
- 239000004411 aluminium Substances 0.000 claims abstract description 21
- 239000002893 slag Substances 0.000 claims abstract description 7
- 239000007789 gas Substances 0.000 claims description 81
- XKRFYHLGVUSROY-UHFFFAOYSA-N Argon Chemical compound [Ar] XKRFYHLGVUSROY-UHFFFAOYSA-N 0.000 claims description 66
- 229910052786 argon Inorganic materials 0.000 claims description 33
- ZAMOUSCENKQFHK-UHFFFAOYSA-N Chlorine atom Chemical compound [Cl] ZAMOUSCENKQFHK-UHFFFAOYSA-N 0.000 claims description 31
- 239000000460 chlorine Substances 0.000 claims description 31
- 229910052801 chlorine Inorganic materials 0.000 claims description 31
- IJGRMHOSHXDMSA-UHFFFAOYSA-N Atomic nitrogen Chemical compound N#N IJGRMHOSHXDMSA-UHFFFAOYSA-N 0.000 claims description 20
- 229910052757 nitrogen Inorganic materials 0.000 claims description 10
- 230000000694 effects Effects 0.000 claims description 6
- 239000000796 flavoring agent Substances 0.000 claims description 5
- 235000019634 flavors Nutrition 0.000 claims description 5
- 239000000155 melt Substances 0.000 claims description 4
- 239000000203 mixture Substances 0.000 claims description 4
- 230000008901 benefit Effects 0.000 abstract description 2
- 239000011148 porous material Substances 0.000 abstract description 2
- 230000007547 defect Effects 0.000 abstract 1
- 238000004904 shortening Methods 0.000 abstract 1
- 229910052751 metal Inorganic materials 0.000 description 10
- 239000002184 metal Substances 0.000 description 10
- 238000001914 filtration Methods 0.000 description 4
- 238000004519 manufacturing process Methods 0.000 description 4
- 238000010926 purge Methods 0.000 description 4
- UFHFLCQGNIYNRP-UHFFFAOYSA-N Hydrogen Chemical compound [H][H] UFHFLCQGNIYNRP-UHFFFAOYSA-N 0.000 description 3
- 208000037656 Respiratory Sounds Diseases 0.000 description 3
- 230000008859 change Effects 0.000 description 3
- 239000001257 hydrogen Substances 0.000 description 3
- 229910052739 hydrogen Inorganic materials 0.000 description 3
- 238000003723 Smelting Methods 0.000 description 2
- 229910052783 alkali metal Inorganic materials 0.000 description 2
- 150000001340 alkali metals Chemical class 0.000 description 2
- 238000007664 blowing Methods 0.000 description 2
- 238000010586 diagram Methods 0.000 description 2
- 238000005868 electrolysis reaction Methods 0.000 description 2
- 230000004907 flux Effects 0.000 description 2
- 239000012535 impurity Substances 0.000 description 2
- 230000008569 process Effects 0.000 description 2
- OKTJSMMVPCPJKN-UHFFFAOYSA-N Carbon Chemical compound [C] OKTJSMMVPCPJKN-UHFFFAOYSA-N 0.000 description 1
- KZBUYRJDOAKODT-UHFFFAOYSA-N Chlorine Chemical compound ClCl KZBUYRJDOAKODT-UHFFFAOYSA-N 0.000 description 1
- 235000006679 Mentha X verticillata Nutrition 0.000 description 1
- 235000002899 Mentha suaveolens Nutrition 0.000 description 1
- 235000001636 Mentha x rotundifolia Nutrition 0.000 description 1
- 229910045601 alloy Inorganic materials 0.000 description 1
- 239000000956 alloy Substances 0.000 description 1
- 230000009286 beneficial effect Effects 0.000 description 1
- 230000000903 blocking effect Effects 0.000 description 1
- 239000011449 brick Substances 0.000 description 1
- 230000007812 deficiency Effects 0.000 description 1
- 239000006185 dispersion Substances 0.000 description 1
- 238000009826 distribution Methods 0.000 description 1
- 239000000428 dust Substances 0.000 description 1
- 238000005516 engineering process Methods 0.000 description 1
- -1 flow Inorganic materials 0.000 description 1
- 229910002804 graphite Inorganic materials 0.000 description 1
- 239000010439 graphite Substances 0.000 description 1
- 230000008676 import Effects 0.000 description 1
- 238000002844 melting Methods 0.000 description 1
- 230000008018 melting Effects 0.000 description 1
- 238000002156 mixing Methods 0.000 description 1
- 238000010943 off-gassing Methods 0.000 description 1
- 230000009467 reduction Effects 0.000 description 1
- 238000007789 sealing Methods 0.000 description 1
- 230000003068 static effect Effects 0.000 description 1
- 238000003756 stirring Methods 0.000 description 1
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 description 1
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Abstract
The invention relates to a casting and degassing method in aluminium electrolytic industry, more concretely to a refining method of degassing and deslag on line for casting 3104 aluminium alloy flat section ingot. The refining method of degassing and deslag on line for casting 3104 aluminium alloy flat section ingot includes kettle furnaces, degassing chutes, degassing apparatuses mounted on the degassing chutes, degassing holders and air source, the said refining method of degassing and deslag on line is that gas is directly sprayed into chute fused mass by the rotary blow head of degassing rotor end, and drives harmful gas and slag patch in the fused mass up to the surface of the fused mass to remove the slag; the advantage of the invention is: 1, improving the degassing efficiency; 2, improving the quality of aluminium liquid; 3, reducing the defect such as crack of flat section ingot, loosening, acicular air pores and snotters; 4, improving the quality of aluminium alloy flat section ingot; 5, reducing labor intensity of worker; 6, shortening the cost for producing flat section ingot and improving economic efficiency.
Description
Technical field
The present invention relates to a kind of electrolysis of aluminum industry casting degasification method, specifically relate to a kind of 3104 aluminium alloy flat blooms and cast online degasification deslagging refining method.
Background technology
Online degasification is the object of each big aluminium processing enterprise's founding primary study and development, and typical online degasification method has the degasification of porous plug overcurrent, the MINT degasification of static jet mode.Because above device is to carry out blowing refining in the bottom; refining effect is poor; refining gas can not move on fast with the gas in the small bubbles entrain aluminium liquid and discharge aluminium liquid, in castingprocesses through regular meeting crack, shrinkage porosite, pinhole, be mingled with, casting flaw such as debris is more.Staff labor intensity is big, and quality product is low, and the finished product rate has only about 60%, and casting flaw is many, and slab ingot crackle tendency is big, is unfavorable for automatic production in enormous quantities.
Summary of the invention
The technical problem to be solved in the present invention is to overcome the deficiency that prior art exists, a kind of raising degassing efficiency is provided, improve the degasification quality, eliminate the slab ingot crackle, shrinkage porosite, pinhole, the degasification chute section setting in 3104 aluminium alloy flat blooms casting flow process that casting flaw such as is mingled with removes air rotor and utilizes rotary nozzle directly gas to be sprayed onto in the chute melt, under the effect of rotational shear power, gas is cut into small bubble, disperse is in melt, and obnoxious flavour in the drive melt and slag inclusion rise to 3104 aluminium alloy flat blooms of bath surface exhaust and slagging-off and cast online degasification deslagging refining method.
The present invention's 3104 aluminium alloy flat blooms are cast online degasification deslagging refining method and are achieved by following technical proposals: the present invention's 3104 aluminium alloy flat blooms are cast online degasification deslagging refining method and are comprised kettle furnace, the revolution chute, the degasification chute, be arranged on the degasifying device of degasification chute section, remove gas holder, the argon gas pipeline, the chlorine pipeline, nitrogen pipeline, the gentle source of mixed gas pipeline constitutes, described online degasification deslagging refining method is to use the rotary nozzle of 6 degasification rotor tips of the degasifying device that is arranged on degasification chute section directly gas to be sprayed onto in the chute melt, under the effect of rotational shear power, gas is cut into small bubble, disperse is in melt, and the obnoxious flavour and the slag inclusion that drive in the melt rise to bath surface exhaust and slagging-off; Its processing condition are: the gas flow of 6 rotors is 75～360sl/min; Gaseous tension 180KPa～690KPa; Finish degassing processing when the aluminium liquid liquid level 25mm～225mm of chute during degasification (4), liquid level＜150mm; Chute during degasification (4) preheating temperature is 695 ℃, and the degasification temperature is 735 ℃.
The present invention's 3104 aluminium alloy flat blooms are cast online degasification deslagging refining method following beneficial effect compared with prior art: 1, utilize the rotor distribution of gas in aluminium liquid, when rotor high-speed rotates gas is distributed in the aluminium liquid uniformly, a large amount of micro-bubbles takes the gas in the aluminium liquid to aluminium liquid surface and removes.2, use the automatic degasification of mechanical deaeration's device, alleviated personnel labor.3, use baffle plate that the aluminium liquid sealing is isolated, improved degassing efficiency.4, quality product and finished product rate have been improved.5, set safe degasification chute liquid level, when reaching the degasification height, the chute liquid level opens intake valve automatically, when the chute liquid level is lower than set(ting)value, degasification finishes, degasifying device removes automatically and sweeps, purge finishing the back degasifying device, to be elevated to mid-way etc. automatically for clearance, increased security.6, high flow capacity is used for blowing open bits or the aluminium liquid in the rotor, guarantee that each pore is unimpeded in the rotor, guaranteed gas flow, casting flaw such as reduced slab ingot crackle, shrinkage porosite, pinhole, be mingled with has improved aluminium liquid quality, has improved quality of aluminium alloy flat section ingot, adopt HDA one III hydrogen meter to survey gas, the anterior survey of online degasifying device hydrogen richness is 0.22mL/100gAl, online degasifying device rear portion, and hydrogen richness is 0.089mL/100gAl.Outgassing rate reaches 59.5%; Reduce working strength of workers, improved work efficiency of workers.Reduced the slab ingot production cost, 30 yuan of production cost reductions per ton, the slab ingot constant product quality, yield rate has improved 33%, has improved economic benefit.The online outgas technique of the present invention is applicable to aluminium and aluminium alloy flat bloom Foundry Production.
Description of drawings
The present invention has following accompanying drawing:
Fig. 1 is the online degasification deslagging refining of a present invention structural representation;
Fig. 2 is the online degasification deslagging refining of a present invention device master TV structure synoptic diagram;
Fig. 3 is the online degasification deslagging refining of the present invention device left side TV structure synoptic diagram.
Wherein: 1, kettle furnace; 2, revolution chute; 3, degasifying device; 4, degasification chute; 5, filtration unit; 6, distribute chute; 7, remove gas holder; 8, argon gas pipeline; 9, chlorine pipeline; 10, nitrogen pipeline; 11, mixed gas pipeline; 12, source of the gas (chlorine, argon gas, nitrogen); 13, remove air rotor; 14, be baffle plate; 15, dust collection system; 16, drive unit; 17, seal closure; 18, lifting system.
Embodiment
Below in conjunction with drawings and Examples the present invention's 3104 aluminium alloy flat blooms being cast online degasification deslagging refining method technical scheme is further described.
As shown in Figure 1,3104 aluminium alloy flat blooms are cast online degasification deslagging refining method and are comprised kettle furnace 1, revolution chute 2, be arranged on the degasifying device 3 of 4 sections of degasification chutes, degasification chute 4, filtration unit 5, distribute chute 6, remove gas holder 7, argon gas pipeline 8, chlorine pipeline 9, nitrogen pipeline 10, mixed gas pipeline 11 and source of the gas 12 constitute, described online degasification deslagging refining method is to use 6 rotary nozzles that remove air rotor 13 ends of the degasifying device 3 that is arranged on 4 sections of degasification chutes directly gas to be sprayed onto in the chute melt, under the effect of rotational shear power, gas is cut into small bubble, disperse is in melt, and the obnoxious flavour and the slag inclusion that drive in the melt rise to bath surface degasification and slagging-off; Its processing condition are: the gas flow of 6 rotors 13 is 75～360sl/min; Gaseous tension 180KPa～690KPa; Finish degassing processing when the aluminium liquid liquid level 25mm～225mm of degasification chute 4 during degasification, liquid level＜150mm; Degasification chute 4 preheating temperatures are 695 ℃ during degasification, and the degasification temperature is 735 ℃.
The gas flow of 6 rotors is 45sl/min during described degassing processing.
No. 6 rotors only give argon gas in described 6 rotors, and No. 1 to No. 5 rotor gives the gas mixture of argon gas and chlorine.
Described No. 6 rotor argon flow amounts are 12～60sl/min, in the mixed gas chlorine flowrate be 0.2sl/min～〉=0.9sl/min.
Embodiment 1.
Described 3104 casting process of aluminum alloy slab ingot steps leave standstill processing for lowering the temperature before pouring into the electrolysis primary aluminum in the smelting furnace from potroom with two-maing ladle, change in the smelting furnace again, handle through meltings such as preparing burden, stir, skim, change in the holding furnace further 13 gas permeable brick degasification again over to, refining treatment such as remove the gred, leave standstill by furnace bottom, the holding furnace casting position that fascinates docks the online degasification deslagging refining through the present invention with chute mouth, on-line filtration and distribute chute promptly to cast chute to crystallizer automatic casting to make 3104 aluminium alloy flat blooms; 3104 aluminium alloy flat blooms are cast online degasification deslagging refining method and are comprised kettle furnace 1, revolution chute 2, be arranged on the degasifying device 3 of 4 sections of degasification chutes, degasification chute 4, filtration unit 5, distribute chute 6, remove gas holder 7, argon gas pipeline 8, chlorine pipeline 9, nitrogen pipeline 10, mixed gas pipeline 11 and source of the gas 12 constitute, described online degasification deslagging refining method is the argon gas with source of the gas 12, chlorine, nitrogen is by argon gas pipeline 8, chlorine pipeline 9 and nitrogen pipeline 10 are delivered to except that gas holder 7 mixes the back gases and are removed air rotor 13 with 6 of the degasifying device 3 that is arranged on 4 sections of degasification chutes and drive lifting system 18 by drive unit 16 and go deep into from the top down in the aluminium liquid liquid, the rotary nozzle that removes air rotor 13 ends directly is sprayed onto gas in the chute melt, under the effect of rotational shear power, gas is cut into small bubble, disperse is in melt, and the obnoxious flavour and the slag inclusion that drive in the melt rise to bath surface exhaust and slagging-off; Its processing condition are: the gas flow of 6 rotors is 75～360sl/min; Gaseous tension 180KPa～690KPa; Finish degassing processing when the aluminium liquid liquid level 25mm～225mm of chute 4 during degasification, liquid level＜150mm; Chute 4 preheating temperatures are 695 ℃ during degasification, and the degasification temperature is 735 ℃.
Flow set: 6 needed high flow capacity total fluxs of rotor are 360sl/min (760SCFH), and online degasification gas is argon gas and chlorine gas mixture.Argon gas and chlorine are that the gas-holder by factory provides.The maximum allowble pressure that enters panel is argon gas 7bar (100psi), chlorine 4bar (60psi).
Argon flow amount is set: argon flow amount must be continuously, and therefore high argon flow amount is 360sl/min (760SCFH), and low argon flow amount is 75sl/min (165SCFH).
Chlorine flowrate is set: inferior inferior to next one casting from a casting, chlorine flowrate may need to change.In fact, before each casting is inferior, according to parameter regulation chlorine set(ting)values such as the alloy in the molten metal, flow, alkali metal contents.The recommendation of chlorine flowrate is to decide according to desired metallurgical performance.Chlorine is used for dry dregs, removes impurity or reduces alkali metal content.Chlorine flowrate was when chlorine was used for dry dregs: 0.2sl/min (0.43SCFH).When chlorine is used for Impurity removal, chlorine flowrate 〉=0.9sl/min (〉=2.0SCFH).
Set each rotor gas flow
Gas mixing system (panel) comprises two import and 6 outlets of being used to handle gas (argon gas and chlorine), and outlet is supplied to the degasification gas that removes the gred except that air rotor.The 6# rotor only gives argon gas, and 1# gives the gas mixture of argon gas and chlorine to the 5# rotor.6 needed low flow total fluxs of rotor are 75sl/min (165SCFH).The argon gas low flow is 12sl/min, and high flow capacity is 45sl/min, and rated flow is 60sl/min.
Set chute aluminium liquid liquid level
Determine that the metal liquid level that is fit to can prevent that aluminium liquid splashes and the chlorine dispersion in Working environment.Under the normal casting case, the minimum metal liquid level should be 200mm in the chute, and the process status of each signal that is sent by the metal liquid level transmitter is as follows:
Chute metal liquid level 〉=25mm sends start signal by the PLC of stove, begins low argon flow amount; The chute metal liquid level reaches 〉=and 200mm begins refining treatment; The chute metal liquid level is handled less than 150mm and is stopped.
Automatic purge
After finishing dealing with, purge can be in order to remove the chlorine mass flow controller, the residual chlorine in manifold device and each rotor pipeline and the graphite rotator automatically.Argon gas was at first injected 30 seconds under the low flow situation, continued 30 seconds then when high flow capacity.Injecting the argon gas peak flow rate is to be 5sl/min, passes the chlorine pipeline.Purge continues general 60 seconds, and when processing finishes or processing carry out when stopping.
The setting degasifying device begins or termination routine is set
Degasifying device just begins or finishes degasification work according to liquid level.When liquid level reaches 25mm when above, degasifying device is started working.When metal liquid level reaches 200mm when above, the degasifying device running, when metal liquid level reaches 150mm when following, degasifying device finishes degasification.
Gas flow when setting beginning and end
When the casting beginning, argon gas must be injected under lower flow, to prevent that aluminium water from entering inlet and blocking them.When metal reaches suitable liquid level in chute, argon gas is switched to higher flows and begins degasification.
Gaseous tension is set the minimum 75psi (520kPa) of argon gas; Maximum 100psi (690kPa)
Claims (4)
1, a kind of 3104 aluminium alloy flat blooms are cast online degasification deslagging refining method, comprise kettle furnace (1), revolution chute (2), be arranged on the degasifying device (3) of degasification chute (4) section, degasification chute (4), remove gas holder (7), argon gas pipeline (8), chlorine pipeline (9), nitrogen pipeline (10), mixed gas pipeline (11) and source of the gas (12) constitute, it is characterized in that: described online degasification deslagging refining method is the argon gas with source of the gas (12), chlorine, nitrogen is by argon gas pipeline (8), chlorine pipeline (9) and nitrogen pipeline (10) are delivered to except that gas holder (7) mixes back gas and are used 6 rotary nozzles that remove air rotor (13) end of the degasifying device (3) that is arranged on degasification chute (4) section directly gas to be sprayed onto in the chute melt, under the effect of rotational shear power, gas is cut into small bubble, disperse is in melt, and the obnoxious flavour and the slag inclusion that drive in the melt rise to bath surface exhaust and slagging-off; Its processing condition are: the gas flow of 6 rotors is 75～360sl/min; Gaseous tension 180KPa～690KPa; Finish degassing processing when the aluminium liquid liquid level 25mm～225mm of chute during degasification (4), liquid level＜150mm; Chute during degasification (4) preheating temperature is 695 ℃, and the degasification temperature is 735 ℃.
2,3104 aluminium alloy flat blooms according to claim 1 are cast online degasification deslagging refining method, it is characterized in that: the gas flow of 6 rotors is 45sl/min during described degassing processing.
3,3104 aluminium alloy flat blooms according to claim 1 are cast online degasification deslagging refining method, it is characterized in that: No. 6 rotors only give argon gas in described 6 rotors, and No. 1 to No. 5 rotor gives the gas mixture of argon gas and chlorine.
4,3104 aluminium alloy flat blooms according to claim 1 are cast online degasification deslagging refining method, it is characterized in that: described No. 6 rotor argon flow amounts are 12～60sl/min, in the mixed gas chlorine flowrate be 0.2sl/min～〉=0.9sl/min.
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CNB200710048986XA CN100453664C (en) | 2007-04-25 | 2007-04-25 | On-line air-eliminating deslagging refining method of 3104 aluminum alloy flat ingot in casting furnace |
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| CNB200710048986XA CN100453664C (en) | 2007-04-25 | 2007-04-25 | On-line air-eliminating deslagging refining method of 3104 aluminum alloy flat ingot in casting furnace |
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| CN101037732A true CN101037732A (en) | 2007-09-19 |
| CN100453664C CN100453664C (en) | 2009-01-21 |
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| CN101984098A (en) * | 2010-11-24 | 2011-03-09 | 上海电机学院 | On-line degassing method for aluminium melt |
| CN102560160A (en) * | 2011-12-29 | 2012-07-11 | 东南大学 | Aluminum alloy vacuum standing, gas removal and smelting device |
| CN103173629A (en) * | 2011-12-23 | 2013-06-26 | 秦皇岛开发区美铝合金有限公司 | Aluminum alloy cleanliness treatment process special for hub forging |
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| JPH0790406A (en) * | 1993-08-12 | 1995-04-04 | Furukawa Electric Co Ltd:The | Method for degassing molten aluminum and aluminum alloy and device therefor |
| CN2328671Y (en) * | 1997-08-15 | 1999-07-14 | 冯敬新 | Aluminium all9y deaerator of suspending rotary blowing rotor |
| JP2007039744A (en) * | 2005-08-03 | 2007-02-15 | Toyota Motor Corp | Rotary degassing device |
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| CN101984098A (en) * | 2010-11-24 | 2011-03-09 | 上海电机学院 | On-line degassing method for aluminium melt |
| CN103173629A (en) * | 2011-12-23 | 2013-06-26 | 秦皇岛开发区美铝合金有限公司 | Aluminum alloy cleanliness treatment process special for hub forging |
| CN102560160A (en) * | 2011-12-29 | 2012-07-11 | 东南大学 | Aluminum alloy vacuum standing, gas removal and smelting device |
| CN103898554A (en) * | 2014-03-18 | 2014-07-02 | 攀钢集团攀枝花钢铁研究院有限公司 | Method and device for rapidly eliminating electrode short circuit of magnesium electrolytic cell |
| CN103898554B (en) * | 2014-03-18 | 2016-07-06 | 攀钢集团攀枝花钢铁研究院有限公司 | A kind of method and apparatus of quick elimination closing down magnesium electrolysis bath electric pole short circuit |
| CN104152708A (en) * | 2014-08-01 | 2014-11-19 | 南京博乔机械有限公司 | Resistance melting furnace with vacuum degassing system |
| CN107442761A (en) * | 2016-06-01 | 2017-12-08 | 郭俊峰 | Metal casting system and method |
| CN106938321A (en) * | 2017-05-02 | 2017-07-11 | 派罗特克（广西南宁）高温材料有限公司 | It is a kind of to remove airslide with dividing plate and gusset |
| CN109423562A (en) * | 2017-08-29 | 2019-03-05 | 晟通科技集团有限公司 | Aluminum anodizing method |
| CN112981126A (en) * | 2021-04-21 | 2021-06-18 | 中国航发北京航空材料研究院 | Refining method for improving purity of high-alloying hard aluminum alloy melt |
| CN116727634A (en) * | 2023-08-15 | 2023-09-12 | 靖江苏科机械制造有限公司 | Casting equipment with compression function |
| CN116727634B (en) * | 2023-08-15 | 2023-10-17 | 靖江苏科机械制造有限公司 | Casting equipment |
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| CN100453664C (en) | 2009-01-21 |
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