CN107619959B - Iron removing method for regenerated Al-Cu-Si series aluminum alloy - Google Patents
Iron removing method for regenerated Al-Cu-Si series aluminum alloy Download PDFInfo
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- CN107619959B CN107619959B CN201710876184.1A CN201710876184A CN107619959B CN 107619959 B CN107619959 B CN 107619959B CN 201710876184 A CN201710876184 A CN 201710876184A CN 107619959 B CN107619959 B CN 107619959B
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- XEEYBQQBJWHFJM-UHFFFAOYSA-N Iron Chemical compound [Fe] XEEYBQQBJWHFJM-UHFFFAOYSA-N 0.000 title claims abstract description 192
- 229910052742 iron Inorganic materials 0.000 title claims abstract description 86
- 229910000838 Al alloy Inorganic materials 0.000 title claims abstract description 31
- 238000000034 method Methods 0.000 title claims abstract description 27
- 229910017758 Cu-Si Inorganic materials 0.000 title claims abstract description 13
- 229910017931 Cu—Si Inorganic materials 0.000 title claims abstract description 13
- XAGFODPZIPBFFR-UHFFFAOYSA-N aluminium Chemical compound [Al] XAGFODPZIPBFFR-UHFFFAOYSA-N 0.000 claims abstract description 103
- 229910052782 aluminium Inorganic materials 0.000 claims abstract description 102
- 239000000956 alloy Substances 0.000 claims abstract description 43
- 229910045601 alloy Inorganic materials 0.000 claims abstract description 42
- 239000007788 liquid Substances 0.000 claims abstract description 22
- 229910052804 chromium Inorganic materials 0.000 claims abstract description 15
- 239000011651 chromium Substances 0.000 claims abstract description 15
- VYZAMTAEIAYCRO-UHFFFAOYSA-N Chromium Chemical compound [Cr] VYZAMTAEIAYCRO-UHFFFAOYSA-N 0.000 claims abstract description 9
- 229910020491 K2TiF6 Inorganic materials 0.000 claims abstract description 9
- 229910052712 strontium Inorganic materials 0.000 claims abstract description 9
- CIOAGBVUUVVLOB-UHFFFAOYSA-N strontium atom Chemical compound [Sr] CIOAGBVUUVVLOB-UHFFFAOYSA-N 0.000 claims abstract description 9
- 239000000919 ceramic Substances 0.000 claims abstract description 4
- 238000007670 refining Methods 0.000 claims description 50
- 239000003795 chemical substances by application Substances 0.000 claims description 48
- 239000003153 chemical reaction reagent Substances 0.000 claims description 28
- FWGZLZNGAVBRPW-UHFFFAOYSA-N alumane;strontium Chemical compound [AlH3].[Sr] FWGZLZNGAVBRPW-UHFFFAOYSA-N 0.000 claims description 22
- 229910052721 tungsten Inorganic materials 0.000 claims description 16
- QRRWWGNBSQSBAM-UHFFFAOYSA-N alumane;chromium Chemical compound [AlH3].[Cr] QRRWWGNBSQSBAM-UHFFFAOYSA-N 0.000 claims description 12
- 230000008929 regeneration Effects 0.000 claims description 12
- 238000011069 regeneration method Methods 0.000 claims description 12
- WCUXLLCKKVVCTQ-UHFFFAOYSA-M potassium chloride Inorganic materials [Cl-].[K+] WCUXLLCKKVVCTQ-UHFFFAOYSA-M 0.000 claims description 11
- 229910004883 Na2SiF6 Inorganic materials 0.000 claims description 10
- OKTJSMMVPCPJKN-UHFFFAOYSA-N Carbon Chemical compound [C] OKTJSMMVPCPJKN-UHFFFAOYSA-N 0.000 claims description 9
- VHHHONWQHHHLTI-UHFFFAOYSA-N hexachloroethane Chemical compound ClC(Cl)(Cl)C(Cl)(Cl)Cl VHHHONWQHHHLTI-UHFFFAOYSA-N 0.000 claims description 9
- 238000001556 precipitation Methods 0.000 claims description 9
- FGIUAXJPYTZDNR-UHFFFAOYSA-N potassium nitrate Chemical compound [K+].[O-][N+]([O-])=O FGIUAXJPYTZDNR-UHFFFAOYSA-N 0.000 claims description 4
- 239000000203 mixture Substances 0.000 claims description 2
- 239000002054 inoculum Substances 0.000 claims 2
- 239000010703 silicon Substances 0.000 abstract description 10
- 229910052710 silicon Inorganic materials 0.000 abstract description 10
- 239000012535 impurity Substances 0.000 abstract description 7
- 229910005438 FeTi Inorganic materials 0.000 abstract description 6
- 150000001875 compounds Chemical class 0.000 abstract description 5
- 239000013078 crystal Substances 0.000 abstract description 3
- 238000001914 filtration Methods 0.000 abstract description 3
- 239000006260 foam Substances 0.000 abstract description 3
- 238000012986 modification Methods 0.000 abstract description 3
- 230000004048 modification Effects 0.000 abstract description 3
- 239000002699 waste material Substances 0.000 abstract description 3
- 229910005347 FeSi Inorganic materials 0.000 abstract description 2
- 238000006243 chemical reaction Methods 0.000 abstract description 2
- 238000009826 distribution Methods 0.000 abstract description 2
- 230000005484 gravity Effects 0.000 abstract description 2
- YNDGDLJDSBUSEI-UHFFFAOYSA-N aluminum strontium Chemical compound [Al].[Sr] YNDGDLJDSBUSEI-UHFFFAOYSA-N 0.000 abstract 1
- 238000000354 decomposition reaction Methods 0.000 abstract 1
- 230000006866 deterioration Effects 0.000 abstract 1
- 238000010438 heat treatment Methods 0.000 abstract 1
- 238000002844 melting Methods 0.000 abstract 1
- 230000008018 melting Effects 0.000 abstract 1
- 239000003607 modifier Substances 0.000 abstract 1
- 239000002244 precipitate Substances 0.000 abstract 1
- 239000004411 aluminium Substances 0.000 description 23
- 238000002474 experimental method Methods 0.000 description 10
- 238000005303 weighing Methods 0.000 description 10
- XUIMIQQOPSSXEZ-UHFFFAOYSA-N Silicon Chemical compound [Si] XUIMIQQOPSSXEZ-UHFFFAOYSA-N 0.000 description 9
- 239000010949 copper Substances 0.000 description 6
- 229910018125 Al-Si Inorganic materials 0.000 description 5
- 229910018520 Al—Si Inorganic materials 0.000 description 5
- 230000000052 comparative effect Effects 0.000 description 5
- 238000010586 diagram Methods 0.000 description 5
- 238000005088 metallography Methods 0.000 description 5
- 238000012360 testing method Methods 0.000 description 5
- 238000005266 casting Methods 0.000 description 4
- 230000007797 corrosion Effects 0.000 description 4
- 238000005260 corrosion Methods 0.000 description 4
- 239000011572 manganese Substances 0.000 description 4
- 238000004519 manufacturing process Methods 0.000 description 4
- 238000000926 separation method Methods 0.000 description 4
- PNEYBMLMFCGWSK-UHFFFAOYSA-N Alumina Chemical compound [O-2].[O-2].[O-2].[Al+3].[Al+3] PNEYBMLMFCGWSK-UHFFFAOYSA-N 0.000 description 3
- RYGMFSIKBFXOCR-UHFFFAOYSA-N Copper Chemical compound [Cu] RYGMFSIKBFXOCR-UHFFFAOYSA-N 0.000 description 3
- 229910052802 copper Inorganic materials 0.000 description 3
- 238000011161 development Methods 0.000 description 3
- 230000018109 developmental process Effects 0.000 description 3
- 238000011160 research Methods 0.000 description 3
- 239000010936 titanium Substances 0.000 description 3
- FYYHWMGAXLPEAU-UHFFFAOYSA-N Magnesium Chemical compound [Mg] FYYHWMGAXLPEAU-UHFFFAOYSA-N 0.000 description 2
- 229910001570 bauxite Inorganic materials 0.000 description 2
- 238000009776 industrial production Methods 0.000 description 2
- 230000001788 irregular Effects 0.000 description 2
- 229910052749 magnesium Inorganic materials 0.000 description 2
- 239000011777 magnesium Substances 0.000 description 2
- 239000011159 matrix material Substances 0.000 description 2
- 229910052751 metal Inorganic materials 0.000 description 2
- 239000002184 metal Substances 0.000 description 2
- 238000004321 preservation Methods 0.000 description 2
- 239000000126 substance Substances 0.000 description 2
- CWYNVVGOOAEACU-UHFFFAOYSA-N Fe2+ Chemical compound [Fe+2] CWYNVVGOOAEACU-UHFFFAOYSA-N 0.000 description 1
- PWHULOQIROXLJO-UHFFFAOYSA-N Manganese Chemical compound [Mn] PWHULOQIROXLJO-UHFFFAOYSA-N 0.000 description 1
- 208000037656 Respiratory Sounds Diseases 0.000 description 1
- 229910005212 Si4Cu Inorganic materials 0.000 description 1
- RTAQQCXQSZGOHL-UHFFFAOYSA-N Titanium Chemical compound [Ti] RTAQQCXQSZGOHL-UHFFFAOYSA-N 0.000 description 1
- HCHKCACWOHOZIP-UHFFFAOYSA-N Zinc Chemical compound [Zn] HCHKCACWOHOZIP-UHFFFAOYSA-N 0.000 description 1
- 238000004458 analytical method Methods 0.000 description 1
- 230000009286 beneficial effect Effects 0.000 description 1
- 230000000903 blocking effect Effects 0.000 description 1
- 229910052799 carbon Inorganic materials 0.000 description 1
- 229910052729 chemical element Inorganic materials 0.000 description 1
- 239000012141 concentrate Substances 0.000 description 1
- 230000007547 defect Effects 0.000 description 1
- 230000007812 deficiency Effects 0.000 description 1
- 238000007872 degassing Methods 0.000 description 1
- 238000001514 detection method Methods 0.000 description 1
- 238000004512 die casting Methods 0.000 description 1
- 238000004090 dissolution Methods 0.000 description 1
- 239000000428 dust Substances 0.000 description 1
- 229910052571 earthenware Inorganic materials 0.000 description 1
- 230000000694 effects Effects 0.000 description 1
- 238000005265 energy consumption Methods 0.000 description 1
- 238000007667 floating Methods 0.000 description 1
- 238000005242 forging Methods 0.000 description 1
- PCHJSUWPFVWCPO-UHFFFAOYSA-N gold Chemical compound [Au] PCHJSUWPFVWCPO-UHFFFAOYSA-N 0.000 description 1
- 229910052737 gold Inorganic materials 0.000 description 1
- 239000010931 gold Substances 0.000 description 1
- 238000003754 machining Methods 0.000 description 1
- 229910052748 manganese Inorganic materials 0.000 description 1
- WPBNNNQJVZRUHP-UHFFFAOYSA-L manganese(2+);methyl n-[[2-(methoxycarbonylcarbamothioylamino)phenyl]carbamothioyl]carbamate;n-[2-(sulfidocarbothioylamino)ethyl]carbamodithioate Chemical compound [Mn+2].[S-]C(=S)NCCNC([S-])=S.COC(=O)NC(=S)NC1=CC=CC=C1NC(=S)NC(=O)OC WPBNNNQJVZRUHP-UHFFFAOYSA-L 0.000 description 1
- 239000000463 material Substances 0.000 description 1
- 230000000505 pernicious effect Effects 0.000 description 1
- 238000000053 physical method Methods 0.000 description 1
- 229920001296 polysiloxane Polymers 0.000 description 1
- 239000000843 powder Substances 0.000 description 1
- 230000001376 precipitating effect Effects 0.000 description 1
- 230000001737 promoting effect Effects 0.000 description 1
- 238000011084 recovery Methods 0.000 description 1
- 238000004064 recycling Methods 0.000 description 1
- 230000001172 regenerating effect Effects 0.000 description 1
- 239000007787 solid Substances 0.000 description 1
- 238000007711 solidification Methods 0.000 description 1
- 230000008023 solidification Effects 0.000 description 1
- 239000004575 stone Substances 0.000 description 1
- 238000005979 thermal decomposition reaction Methods 0.000 description 1
- 229910052719 titanium Inorganic materials 0.000 description 1
- 230000007704 transition Effects 0.000 description 1
- 238000009834 vaporization Methods 0.000 description 1
- 239000011701 zinc Substances 0.000 description 1
- 229910052725 zinc Inorganic materials 0.000 description 1
- 229910000859 α-Fe Inorganic materials 0.000 description 1
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- Manufacture And Refinement Of Metals (AREA)
Abstract
The invention discloses a method for removing iron from regenerated Al-Cu-Si series aluminum alloy, wherein in the iron removing process, added strontium is subjected to modification treatment to break and decompose an acicular β -iron phase and refine primary crystal silicon to make the tissue distribution more uniform, and chromium makes β -Al series aluminum alloy5Conversion of FeSi to α -Al3(Fe,Cr)4Si4The Cu bulk iron phase, settled to the bottom of the crucible. K2TiF6Decomposition by heating to produce Ti2+Combined with Fe as impurity to produce FeTi (Fe)2Ti) compounds with high melting point and high density, and the iron-rich phases sink to the bottom of the crucible under the action of gravity, thereby further removing iron. Filtering out the precipitate at the lower part of the aluminum liquid through a ceramic foam filter screen, and adding an aluminum-strontium intermediate alloy modifier for secondary modification. Further deterioration after iron removal converts the residual needle-like iron phase into a less harmful massive iron phase. The method has the characteristics of simple operation, low cost, easy control and obvious reduction of the iron content in the waste aluminum.
Description
Technical field
The invention belongs to aluminium-alloy iron-removing technical fields, remove iron side more particularly, to a kind of regeneration Al-Cu-Si line aluminium alloy
Method.
Background technique
Aluminium and aluminium alloy are applied as non-ferrous metal with excellent mechanical property, corrosion resistance and electrical and thermal conductivity
It is very extensive.The aluminium alloy that different elements is added in aluminium and forms, compared with primary aluminum, various performances are changed, can
To meet the needs of different.
China is aluminium production and consumption big country, but China's bauxite resource does not enrich, and in view of the shortage of China's bauxite resource and uses aluminium
The increased contradiction of demand, aluminium scrap recycling has been put on schedule, while meeting sustainable development demand.Secondary aluminium, which refers to, not to be had
Use value or the aluminium scrap for being unsatisfactory for requirement.Secondary aluminium is compared with aluminum production, and required less energy consumption, waste discharge is low,
Production process is saved simultaneously.Therefore, the development of secondary aluminium receives the attention of countries in the world, still, during waste aluminum recovery
There is a serious problem, there is a large amount of impurity elements in aluminium scrap, and impurity element and inclusion content are high, greatly limit
The development and application of secondary aluminium alloy.It is especially most stringent with iron tramp requirement in all impurity elements, in high-quality aluminum alloy
Iron tramp seriously affects its comprehensive mechanical property and corrosion resistance, so, Yao Fazhan high-performance aluminium alloy, it is necessary to solve and disappear
Except the influence of ferro element.
It is maximum with the harm of ferro element in numerous impurity elements.Fe solid solubility in aluminium alloy is very low, when Fe content is super
When 0.4%, it is easy to form coarse gill shape Fe phase with other elements in aluminium alloy, form close to FeSiAl5(i.e. β-Fe
Phase) compound.It has seriously isolated matrix, generates stress and concentrates and sprout crackle, in process of deformation, matrix and brittleness
It is precipitated on intersection interface and is easy to produce hole.When Fe content is more than 0.7%, coarse β-Fe mutually will largely exist.Fe is divided by
Except influencing on material property, also the flowing of molten metal can be hindered during solidification, to increase the shrinkage cavity of ingot casting and loose
The defects of.Needle-shaped Fe phase hardness is higher, and cutter is worn in machining process, cannot be guaranteed element precision.
In order to reduce the harm of needle-shaped Fe phase, research method mainly includes two classes at present: the first kind is to use Metamorphism treatment,
Addition or changes Fe phase morphology using special technique at chemical element, make coarse acicular beta-Fe phase transition harmfulness compared with
Small α-Fe phase；Another kind is to utilize physicochemical properties different between Fe-riched phase and melt, Jin Erda using physical method
To the purpose for removing iron, including the separation of settling methods, centrifugal separation, electromagnetism, electroslag refining and filtering etc..Centrifuge separation increases
Production process, trivial operations are unsuitable for industrial production.Electromagnetism separation is more demanding to the pattern of Fe phase, when electromagnetic force is permeated
When depth deficiency, it will lead to irregular Fe phase and move irregular, be easy to produce turbulent flow, remove iron rate to reduce.Electroslag refining
Research is also relatively fewer at present, and rests in the research of fine aluminium, exists simultaneously to elements such as silicon, magnesium and does not study specifically.
Al-Cu-Si line aluminium alloy is a kind of using aluminium, copper, silicon as the forging of principal component and casting alloy.General copper content is
4% or so, silicon content is 6.5~7.5%.A small amount of zinc, manganese, titanium is added simultaneously to refine crystal grain, improves intensity.With ZL107 aluminium
For alloy, chemical component are as follows: copper content about 4%, silicone content about 7%, manganese content be lower than 0.3%, content of magnesium less than 0.1%,
Iron content is lower than 0.6%, and surplus is aluminium.
Summary of the invention
The purpose of the present invention is designing a kind of method for removing iron for regenerating Al-Cu-Si line aluminium alloy, overcome at present except iron side
The single problem of method, and to the difference of element contained by the aluminium scrap of the different trades mark, it is targetedly cleaned, and overcome except iron
The problem of process is difficult to control reaction and is not suitable for industrial production etc..
The present invention is technical solution used by solving its technical problem are as follows:
A kind of regeneration Al-Cu-Si line aluminium alloy method for removing iron, includes the following steps:
(1-1) weighs the molten aluminum that quality is W, weighs the refining agent of 0.2%W~0.3%W, refining agent is cast into refining
Refining agent block is put into baking oven by agent block, so that oven temperature is risen to 200 DEG C~300 DEG C and is kept the temperature 50~80 minutes；
(1-2) weighs aluminium-strontium intermediate alloy alterant of 0.25%W~0.35%W and 0.15%W~0.2%W respectively,
Aluminium-strontium intermediate alloy alterant is put into baking oven, oven temperature is made to rise to 250 DEG C~350 DEG C and keeps the temperature 30~60 minutes；
(1-3) weighs the iron removing reagent of 2%W~2.5%W, and iron removing reagent is put into baking oven, and oven temperature is made to rise to 200 DEG C
~300 DEG C and heat preservation 50~70 minutes；
Molten aluminum is heated to 700 DEG C~730 DEG C by (1-4), and refining agent is pressed into molten aluminum with bell jar and keeps the temperature 15~25 points
It skims after clock；
(1-5) makes temperature of aluminum liquid be in 710 DEG C~730 DEG C, and alterant is added into molten aluminum and keeps the temperature 20~30 minutes；
(1-6) makes temperature of aluminum liquid be in 690 DEG C~720 DEG C, and iron removing reagent is added into molten aluminum and keeps the temperature 40~60 minutes；
(1-7) filters off molten aluminum bottom precipitation, and temperature of aluminum liquid is made to be in 700 DEG C~720 DEG C, and alterant is added simultaneously into molten aluminum
Heat preservation 15~20 minutes, it is last air-cooled.
Operation of the present invention is simple, low in cost, easily controllable, in conjunction with except two sub-metamorphism before and after iron, can refine again
Needle like Iron Phase in cast alumin(i)um alloy is simultaneously captured, and is deposited to crucible bottom, is substantially reduced iron content in aluminium scrap, by removing
Further going bad after iron is converted into remaining Needle like Iron Phase and endangers small blocky iron phase, improve the tensile strength of aluminium alloy
And elongation percentage, enhance the corrosion resistance and casting character of aluminium alloy.
Xray fluorescence spectrometer can be used and carry out chemical component detection and analysis.
Method of the invention is practical, simple to operation, and the pernicious gas of generation is few, can effectively remove Al-Si line aluminium alloy
In impurity ferro element.KNO in refining agent of the invention3It is reacted with carbon dust and generates N2With CO2, and molten aluminum is not dissolved in, bubble is upper
Take the oxide inclusion and H in molten aluminum in floating process out of2, play the role of degasification slagging-off.C2Cl6It decomposes and generates C2Cl4And Cl2,
C2Cl4Vaporization at high temperature plays the purpose of auxiliary refining.Na2SiF6Dissolution aluminium oxide can be adsorbed, the NaF of generation is decomposed while being had
Metamorphism.KCl is worked as a buffer, and prevents from reacting too fast.KNO simultaneously3The K generated is decomposed with KCl+To generation FeTi (Fe2Ti)
The pattern of compound plays the role of promoting nodularization, makes FeTi (Fe2Ti) compound is easier to be deposited to melt bottom.
In iron removal, the strontium of addition carries out Metamorphism treatment, so that acicular beta-iron phase produced fracture, decomposed, and refine just
Crystal silicon keeps Tissue distribution more uniform.Chromium makes β-Al5FeSi is changed into α-Al3(Fe,Cr)4Si4Cu bulk iron phase, is deposited to earthenware
Crucible bottom.K2TiF6Ti is generated by thermal decomposition2+, FeTi (Fe is generated in conjunction with impurity F e2Ti) compound has high-melting-point, highly dense
Degree, these Fe-riched phases are deposited to crucible bottom under the effect of gravity, to reach further except iron.
Molten aluminum lower part precipitating is filtered off by ceramic foam filter net, aluminium-strontium intermediate alloy alterant is added and carries out secondary change
Matter.By being converted into remaining Needle like Iron Phase and endangering small blocky iron phase except further going bad after iron.
Preferably, the refining agent is by KNO3、C2Cl6、Na2SiF6, KCl and graphite powder composition, the KNO in refining agent3、
C2Cl6、Na2SiF6, KCl and graphite powder mass parts ratio be (7.5-8.75): (1-2): (5.75-7): (5-6.5): (2-
2.75)。
Preferably, the iron removing reagent is by aluminium-chromium intermediate alloy and K2TiF6It forms, aluminium-chromium intermediate alloy in iron removing reagent
And K2TiF6Mass parts ratio be (1-1.34): (1.26-1.78).
Preferably, the content of strontium is 8%-11% in the aluminium-strontium intermediate alloy alterant.
Preferably, filtering off molten aluminum bottom precipitation using ceramic foam filter net.
Preferably, the content of chromium is 9%-11% in the aluminium-chromium intermediate alloy.
Therefore, the invention has the following beneficial effects: easy to operate, low in cost, easily controllable, in conjunction with iron removing reagent and company
Continuous alterant agent twice, can refine the Needle like Iron Phase in secondary aluminium alloy and be captured, be deposited to crucible bottom, make aluminium scrap
Middle iron content is substantially reduced, and by secondary metamorphic, is converted into remaining Needle like Iron Phase and is endangered small blocky iron phase.Improve aluminium conjunction
The tensile strength and elongation percentage of gold, enhance the corrosion resistance and casting character of aluminium alloy.
Detailed description of the invention
Fig. 1 is a kind of experiment front and back metallography microscope comparative diagram of the embodiment of the present invention 1；
Fig. 2 is a kind of experiment front and back metallography microscope comparative diagram of the embodiment of the present invention 2；
Fig. 3 is a kind of experiment front and back metallography microscope comparative diagram of the embodiment of the present invention 3；
Fig. 4 is a kind of experiment front and back metallography microscope comparative diagram of the embodiment of the present invention 4；
Fig. 5 is a kind of experiment front and back metallography microscope comparative diagram of the embodiment of the present invention 5；
Fig. 6 is a kind of flow chart of the embodiment of the present invention 1.
Specific embodiment
The present invention will be further described with reference to the accompanying drawings and detailed description.
Embodiment 1:
As shown in fig. 6, a kind of regeneration Al-Cu-Si line aluminium alloy method for removing iron, includes the following steps:
Step 100, weigh that refining agent, die casting is blocking and toasts
The aluminium block that quality is 2Kg is weighed, the refining agent of 5g is weighed, refining agent is cast into refining agent block, by refining agent block
It is put into baking oven, oven temperature is made to rise to 260 DEG C and keeps the temperature 55 minutes；KNO in refining agent3、C2Cl6、Na2SiF6, KCl and stone
The mass parts ratio of ink powder is 8:1.2:6:5.8:2.3.
Step 200, it weighs alterant and toasts
Aluminium-strontium intermediate alloy the alterant for weighing 6g and 3g respectively, aluminium-strontium intermediate alloy alterant is put into baking oven,
So that oven temperature is risen to 200 DEG C and keeps the temperature 45 minutes；The content of strontium is 8% in aluminium-strontium intermediate alloy alterant in alterant.
Step 300, it weighs iron removing reagent and toasts
The iron removing reagent for weighing 44g, iron removing reagent is put into baking oven, so that oven temperature is risen to 220 DEG C and is kept the temperature 50 minutes；It removes
Aluminium-chromium intermediate alloy and K in chalybeate2TiF6Mass parts ratio be 1.21:1.38, chromium contains in the aluminium-chromium intermediate alloy
Amount is 10%.
Step 400, refining agent is added in molten aluminum
Molten aluminum is heated to 710 DEG C, refining agent is pressed into molten aluminum with bell jar and is skimmed after keeping the temperature 15 minutes；
Step 500, alterant is added in molten aluminum
So that temperature of aluminum liquid is in 700 DEG C, alterant is added into molten aluminum and keeps the temperature 20 minutes；
Step 600, iron removing reagent is added in molten aluminum
So that temperature of aluminum liquid is in 705 DEG C, iron removing reagent is added into molten aluminum and keeps the temperature 45 minutes, iron-content is dropped from 1.02%
To 0.58%, as shown in table 1.
Step 700, alterant is added in molten aluminum
Molten aluminum bottom precipitation is filtered off, temperature of aluminum liquid is made to be in 700 DEG C, alterant is added into molten aluminum and keeps the temperature 20 minutes,
Last air-cooled, as shown in Figure 1, left figure is metallographic microscope before testing, it can be observed that a large amount of grey Needle like Iron Phase, right figure is experiment
It is tiny granular to observe that primary silicon phase and remaining Needle like Iron Phase are changed into after metamorphism for metallographic microscope afterwards.
Table 1
| Element | Apparent concentration | Mass percent [wt.%] | Atomic percent [at.%] |
| Al | 78.18 | 91.11 | 92.94 |
| Si | 5.39 | 5.78 | 5,66 |
| Fe | 0.45 | 0.58 | 0.29 |
| Mn | 0.41 | 0.22 | 0.11 |
| Cu | 2.23 | 2.31 | 1.00 |
| Total amount: | 86.66 | 100.00 | 100.00 |
Embodiment 2:
A kind of regeneration Al-Si line aluminium alloy method for removing iron, includes the following steps:
Step 1, the aluminium block that quality is 2Kg is weighed, the refining agent of 4g is weighed, refining agent is cast into refining agent block, it will be smart
Refining agent block is put into baking oven, so that oven temperature is risen to 240 DEG C and is kept the temperature 60 minutes；KNO in refining agent3、C2Cl6、Na2SiF6、
The mass parts ratio of KCl and graphite powder is 7.5:1:6.5:5:2.65.
Step 2, the aluminium-strontium intermediate alloy alterant for weighing 5g and 3.6g respectively, aluminium-strontium intermediate alloy alterant is put into
In baking oven, so that oven temperature is risen to 240 DEG C and keep the temperature 50 minutes；Strontium contains in aluminium-strontium intermediate alloy alterant in alterant
Amount is 10%.
Step 3, the iron removing reagent for weighing 48g, iron removing reagent is put into baking oven, so that oven temperature is risen to 200 DEG C and is kept the temperature 55
Minute；Aluminium-chromium intermediate alloy and K2TiF6Mass parts ratio be 1.34:1.30.The content of chromium in the aluminium-chromium intermediate alloy
It is 9%.
Step 4, molten aluminum is heated to 705 DEG C, refining agent is pressed into molten aluminum with bell jar and skimmed after keeping the temperature 18 minutes；
Step 5, so that temperature of aluminum liquid is in 710 DEG C, alterant is added into molten aluminum and keeps the temperature 15 minutes；
Step 6, make temperature of aluminum liquid be in 690 DEG C, into molten aluminum be added iron removing reagent and keep the temperature 50 minutes, iron-content from
0.91% drops to 0.54%, as shown in table 2.
Step 7, molten aluminum bottom precipitation is filtered off, temperature of aluminum liquid is made to be in 710 DEG C, alterant is added into molten aluminum and keeps the temperature 15
Minute, it is last air-cooled as shown in Fig. 2, left figure is metallographic microscope before testing, it can be observed that a large amount of grey Needle like Iron Phase, right figure are
It is tiny granular to observe that primary silicon phase and remaining Needle like Iron Phase are changed into after metamorphism for metallographic microscope after experiment.
Table 2
Embodiment 3:
A kind of regeneration Al-Si line aluminium alloy method for removing iron, includes the following steps:
Step 1, the aluminium block that quality is 2Kg is weighed, the refining agent of 5.6g is weighed, refining agent is cast into refining agent block, it will
Refining agent block is put into baking oven, so that oven temperature is risen to 200 DEG C and is kept the temperature 50 minutes；KNO in refining agent3、C2Cl6、
Na2SiF6, KCl and graphite powder mass parts ratio be 8.2:1.5:5.75:6:2.
Step 2, the aluminium-strontium intermediate alloy alterant for weighing 5.6g and 3.2g respectively, aluminium-strontium intermediate alloy alterant is put
Into baking oven, so that oven temperature is risen to 250 DEG C and keep the temperature 40 minutes；Strontium in aluminium-strontium intermediate alloy alterant in alterant
Content is 9%.
Step 3, the iron removing reagent for weighing 40g, iron removing reagent is put into baking oven, so that oven temperature is risen to 250 DEG C and is kept the temperature 60
Minute；Aluminium-chromium intermediate alloy and K2TiF6Mass parts ratio be 1:1.78.The content of chromium is in the aluminium-chromium intermediate alloy
10%.
Step 4, molten aluminum is heated to 700 DEG C, refining agent is pressed into molten aluminum and is kept the temperature with bell jar and is skimmed after twenty minutes；
Step 5, so that temperature of aluminum liquid is in 705 DEG C, alterant is added into molten aluminum and keeps the temperature 18 minutes；
Step 6, make temperature of aluminum liquid be in 710 DEG C, into molten aluminum be added iron removing reagent and keep the temperature 40 minutes, iron-content from
0.89% drops to 0.49%, as shown in table 3.
Step 7, molten aluminum bottom precipitation is filtered off, temperature of aluminum liquid is made to be in 705 DEG C, alterant is added into molten aluminum and keeps the temperature 18
Minute, it is last air-cooled as shown in figure 3, left figure is metallographic microscope before testing, it can be observed that a large amount of grey Needle like Iron Phase, right figure are
It is tiny granular to observe that primary silicon phase and remaining Needle like Iron Phase are changed into after metamorphism for metallographic microscope after experiment.
Table 3
| Element | Apparent concentration | Mass percent [wt.%] | Atomic percent [at.%] |
| Al | 72.55 | 91.85 | 93.81 |
| Si | 5.18 | 4.76 | 4.67 |
| Fe | 0.47 | 0.49 | 0.24 |
| Mn | 0.16 | 0.27 | 0.14 |
| Cu | 2.18 | 2.63 | 1.14 |
| Total amount: | 80.54 | 100.00 | 100.00 |
Embodiment 4:
A kind of regeneration Al-Si line aluminium alloy method for removing iron, includes the following steps:
Step 1, the aluminium block that quality is 2Kg is weighed, the refining agent of 6g is weighed, refining agent is cast into refining agent block, it will be smart
Refining agent block is put into baking oven, so that oven temperature is risen to 270 DEG C and is kept the temperature 70 minutes；KNO in refining agent3、C2Cl6、Na2SiF6、
The mass parts ratio of KCl and graphite powder is 8.75:1.8:6.8:5.5:2.5.
Step 2, the aluminium-strontium intermediate alloy alterant for weighing 6.6g and 4g respectively, aluminium-strontium intermediate alloy alterant is put into
In baking oven, so that oven temperature is risen to 300 DEG C and keep the temperature 55 minutes；Strontium contains in aluminium-strontium intermediate alloy alterant in alterant
Amount is 11%.
Step 3, the iron removing reagent for weighing 50g, iron removing reagent is put into baking oven, so that oven temperature is risen to 300 DEG C and is kept the temperature 70
Minute；Aluminium-chromium intermediate alloy and K2TiF6Mass parts ratio be 1.3:1.26.The content of chromium is in the aluminium-chromium intermediate alloy
11%.
Step 4, molten aluminum is heated to 720 DEG C, refining agent is pressed into molten aluminum with bell jar and skimmed after keeping the temperature 25 minutes；
Step 5, so that temperature of aluminum liquid is in 720 DEG C, alterant is added into molten aluminum and keeps the temperature 22 minutes；
Step 6, make temperature of aluminum liquid be in 720 DEG C, into molten aluminum be added iron removing reagent and keep the temperature 55 minutes, iron-content from
0.82% drops to 0.43%, as shown in table 4.
Step 7, molten aluminum bottom precipitation is filtered off, temperature of aluminum liquid is made to be in 720 DEG C, alterant is added into molten aluminum and keeps the temperature 22
Minute, it is last air-cooled as shown in figure 4, left figure is metallographic microscope before testing, it can be observed that a large amount of grey Needle like Iron Phase, right figure are
It is tiny granular to observe that primary silicon phase and remaining Needle like Iron Phase are changed into after metamorphism for metallographic microscope after experiment.
Table 4
Embodiment 5:
A kind of regeneration Al-Si line aluminium alloy method for removing iron, includes the following steps:
Step 1, the aluminium block that quality is 2Kg is weighed, the refining agent of 5.2g is weighed, refining agent is cast into refining agent block, it will
Refining agent block is put into baking oven, so that oven temperature is risen to 300 DEG C and is kept the temperature 80 minutes；KNO in refining agent3、C2Cl6、
Na2SiF6, KCl and graphite powder mass parts ratio be 8.4:2:7:6.5:2.75.
Step 2, aluminium-strontium intermediate alloy alterant is put into baking by the aluminium-strontium intermediate alloy alterant for weighing 7g and 3g respectively
In case, so that oven temperature is risen to 280 DEG C and keep the temperature 60 minutes；The content of strontium in aluminium-strontium intermediate alloy alterant in alterant
It is 10%.
Step 3, the iron removing reagent for weighing 46g, iron removing reagent is put into baking oven, so that oven temperature is risen to 290 DEG C and is kept the temperature 65
Minute；Aluminium-chromium intermediate alloy and K2TiF6Mass parts ratio be 1.2:1.45.The content of chromium is in the aluminium-chromium intermediate alloy
9%.
Step 4, molten aluminum is heated to 730 DEG C, refining agent is pressed into molten aluminum with bell jar and skimmed after keeping the temperature 23 minutes；
Step 5, so that temperature of aluminum liquid is in 715 DEG C, alterant is added into molten aluminum and keeps the temperature 15 minutes；
Step 6, make temperature of aluminum liquid be in 715 DEG C, into molten aluminum be added iron removing reagent and keep the temperature 60 minutes, iron-content from
1.05% drops to 0.56%, as shown in table 5.
Step 7, molten aluminum bottom precipitation is filtered off, temperature of aluminum liquid is made to be in 715 DEG C, alterant is added into molten aluminum and keeps the temperature 15
Minute, it is last air-cooled as shown in figure 5, left figure is metallographic microscope before testing, it can be observed that a large amount of grey Needle like Iron Phase, right figure are
It is tiny granular to observe that primary silicon phase and remaining Needle like Iron Phase are changed into after metamorphism for metallographic microscope after experiment.
Table 5
| Element | Apparent concentration | Mass percent [wt.%] | Atomic percent [at.%] |
| Al | 72.13 | 91,27 | 93.14 |
| Si | 6.20 | 5.54 | 5.43 |
| Fe | 0.49 | 0.56 | 0.27 |
| Mn | 0.18 | 0.25 | 0.13 |
| Cu | 2.24 | 2.38 | 1.03 |
| Total amount: | 81.24 | 100.00 | 100.00 |
It should be understood that this embodiment is only used to illustrate the invention but not to limit the scope of the invention.In addition, it should also be understood that,
After having read the content of the invention lectured, those skilled in the art can make various modifications or changes to the present invention, these etc.
Valence form is also fallen within the scope of the appended claims of the present application.
Claims (5)
1. a kind of regeneration Al-Cu-Si line aluminium alloy method for removing iron, characterized in that include the following steps:
(1-1) weighs the molten aluminum that quality is W, weighs the refining agent of 0.2%W~0.3%W, refining agent is cast into refining agent block, will
Refining agent block is put into baking oven, so that oven temperature is risen to 200 DEG C~300 DEG C and is kept the temperature 50~80 minutes；
(1-2) weighs aluminium-strontium intermediate alloy alterant of 0.25%W~0.35%W and 0.15%W~0.2%W respectively, will be in aluminium-strontium
Between alloy inoculant be put into baking oven, make oven temperature rise to 250 DEG C~350 DEG C and keep the temperature 30~60 minutes；
(1-3) weighs the iron removing reagent of 2%W~2.5%W, and iron removing reagent is put into baking oven, and oven temperature is made to rise to 200 DEG C~300 DEG C
And keep the temperature 50~70 minutes；
Iron removing reagent is by aluminium-chromium intermediate alloy and K2TiF6It forms, the aluminium-chromium intermediate alloy and K in iron removing reagent2TiF6Mass fraction
Than for (1-1.34): (1.26-1.78)；
Molten aluminum is heated to 700 DEG C~730 DEG C by (1-4), and refining agent is pressed into molten aluminum and after keeping the temperature 15~25 minutes with bell jar
It skims；
(1-5) makes temperature of aluminum liquid be in 710 DEG C~730 DEG C, and alterant is added into molten aluminum and keeps the temperature 20~30 minutes；
(1-6) makes temperature of aluminum liquid be in 690 DEG C~720 DEG C, and iron removing reagent is added into molten aluminum and keeps the temperature 40~60 minutes；
(1-7) filters off molten aluminum bottom precipitation, and temperature of aluminum liquid is made to be in 700 DEG C~720 DEG C, and alterant is added into molten aluminum and keeps the temperature
It is 15~20 minutes, last air-cooled.
2. regeneration Al-Cu-Si line aluminium alloy method for removing iron according to claim 1, characterized in that the refining agent by
KNO3、C2Cl6、Na2SiF6, KCl and graphite powder composition, the KNO in refining agent3、C2Cl6、Na2SiF6, KCl and graphite powder matter
Measuring portion rate is (7.5-8.75): (1-2): (5.75-7): (5-6.5): (2-2.75).
3. regeneration Al-Cu-Si line aluminium alloy method for removing iron according to claim 1, characterized in that among the aluminium-strontium
The content of strontium is 8%-11% in alloy inoculant.
4. regeneration Al-Cu-Si line aluminium alloy method for removing iron according to claim 1 or 2 or 3, characterized in that using ceramics
Foamed filter net filters off molten aluminum bottom precipitation.
5. regeneration Al-Cu-Si line aluminium alloy method for removing iron according to claim 1, characterized in that among the aluminium-chromium
The content of chromium is 9%-11% in alloy.
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