CN101603129A - Remove the method for impurity iron in the aluminium alloy - Google Patents
Remove the method for impurity iron in the aluminium alloy Download PDFInfo
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- CN101603129A CN101603129A CNA200910054601XA CN200910054601A CN101603129A CN 101603129 A CN101603129 A CN 101603129A CN A200910054601X A CNA200910054601X A CN A200910054601XA CN 200910054601 A CN200910054601 A CN 200910054601A CN 101603129 A CN101603129 A CN 101603129A
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- aluminium alloy
- slag charge
- iron
- electrode rod
- consumable electrode
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Abstract
The method of impurity iron in a kind of removal aluminium alloy of metallic substance technical field comprises the steps: aluminium alloy is poured into the consumable electrode rod, and the consumable electrode rod is put into electroslag furnace, adds slag charge, carries out esr; After melting is finished, cut off the electricity supply, cooling obtains aluminium alloy, and wherein, described slag charge is a kind of in the following composition, and the percentage ratio in the described composition is weight percentage: 5～10%MgF
2+ 40～50%MgCl
2+ 30～40%KCl+10～25%AlP, 5～10%MgF
2+ 40～50%MgCl
2+ 30～40%KCl+10～25%AlPO
4, 70～90%Na
3AlF
6+ 10～30%AlP and 70～90%Na
3AlF
6+ 10～30%AlPO
4Method of the present invention has reduced content of iron impurity in aluminium alloy effectively.
Description
Technical field
The present invention relates to a kind of method of removal impurity of metallic substance technical field, specifically is a kind of method of removing impurity iron in the aluminium alloy.
Background technology
In recent years, along with the continuous increase of aluminium alloy consumption, also more and more higher to its performance demands.Usually people improve the aluminium performance by methods such as thermal treatment, alloyings, but these methods can to improve the amplitude of aluminium performance limited, its major cause is the performance index restriction that is subjected to initial aluminium, therefore further improve the performance index of initial aluminium, the influence of removing detrimental impurity also just becomes a great problem.Wherein no matter the impurity element iron in the aluminium alloy is to cast aluminium alloy or wrought aluminium alloy, and its hazardness all is well-known.Ferro element in the aluminium alloy mainly comes from the commercial run of aluminium metallurgy, and the iron instrument in industrial melting and the castingprocesses, and in addition, the recycling of aluminium scrap also is the important source that ferro element pollutes.These ferro elements normal with aluminium alloy in other element generation Al
3Fe, β-Al
5FeSi, Al
12Fe
3Si, Al
9Fe
2Si
2Etc. rich iron phase, these relative aluminum substrates have the serious effect of isolating, thereby greatly reduce the performance of aluminium alloy.At present, the method that is used for removing the aluminium alloy impurity iron mainly contains settling methods, centrifugal removal method, electromagnetic separation process etc.No matter be settling methods, centrifugal removal method or electromagnetic separation process, all be to form the higher rich iron phase of fusing point by in molten aluminium, adding alloying element (Mn, Cr etc.), utilize the density difference and the electric conductivity difference that exist between rich iron phase and the molten aluminium, thereby make rich iron phase under the effect of gravity, centrifugal force or electromagnetic force, separate, assemble and remove with molten aluminium.But the use of these methods is subjected to the influence of factors such as the add-on, treatment temp, time of repose of critical iron level, alloying element bigger, complex process, and the alloying element of Jia Ruing itself also is a kind of impurity in addition, if the excessive performance that also can reduce alloy greatly.Therefore, existingly remove the requirement that iron processes can not adapt to industrial development, be badly in need of a kind of effective method for removing iron and remedy this defective, fundamentally solve the problem that impurity iron brings in the aluminium alloy.
Find through literature search prior art, Li Tianxiao etc. are in " Shanghai Communications University's journal " (calendar year 2001, the 5th phase, the 664th～667 page) on delivered " electromagnetic separation reduce Iron in Al-Si Alloy content " literary composition, propose in this article Mn is joined in the molten aluminium, rich iron phase is phase-changed into the α phase of bulk or Chinese character shape by needle-like β, utilize the primary Fe-rich phase in the isolating method removal of the electromagnetic field molten aluminium then, after twice electromagnetic separation processing, Fe content is reduced to 0.41% from 1.13%.But this method complex process, removal effect is inhomogeneous, and the Fe content after the removal is still very high, and has introduced again when removing the Fe element the deleterious element M n of molten aluminium.
Summary of the invention
The objective of the invention is to overcome the deficiencies in the prior art, a kind of method of removing impurity iron in the aluminium alloy is provided.Method of the present invention has reduced content of iron impurity in aluminium alloy effectively.
The present invention is achieved by the following technical solutions, the present invention includes following steps:
Aluminium alloy is poured into the consumable electrode rod, the consumable electrode rod is put into electroslag furnace, add slag charge, carry out esr; After melting is finished, cut off the electricity supply, cooling obtains aluminium alloy;
Described slag charge is a kind of in the following composition:
5～10％MgF
2+40～50％MgCl
2+30～40％KCl+10～25％AlP，
5～10％MgF
2+40～50％MgCl
2+30～40％KCl+10～25％AlPO
4，
70～90％Na
3AlF
6+10～30％AlP，
70～90％Na
3AlF
6+10～30％AlPO
4；
Wherein, the percentage ratio in the composition is weight percentage.
The add-on of described slag charge is 5～15% of a consumable electrode rod weight.
Described slag charge need be baked to no moisture and crystal water before adding.
The electric current of described esr is 500～1000A, and voltage is 40～60V.
The present invention is on existing conventional esr platform base, adopt new slag charge to carry out remelting, by the fused slag bath, impurity iron element in the molten aluminium and the flux in the electroslag liquid react and enter in the slag, thereby remove the impurity iron in the aluminium alloy behind aluminum alloy melting.
Compared with prior art, the present invention has following beneficial effect: method of the present invention can make the iron level in the aluminium alloy reduce by 30%～50%, has reduced the impurity iron element in the aluminium alloy effectively; Whole purification process is easy and simple to handle, with low cost simultaneously, and the purification efficiency height can not introduced other deleterious impurity elements yet.
Embodiment
Below embodiments of the invention are elaborated: present embodiment is being to implement under the prerequisite with the technical solution of the present invention, provided detailed embodiment and concrete operating process, but protection scope of the present invention is not limited to following embodiment.Unless stated otherwise, otherwise the percentage ratio among the embodiment is weight percentage.
Embodiment 1
With iron-holder is that 0.43% aluminium alloy pours into cylindrical consumable electrode rod as requested, and diameter is 0.4～0.7 times of crystallizer internal diameter, and length is 1.5～2 times of crystallizer height; Then aluminium alloy consumable electrode rod is put into electroslag furnace, add slag charge: 10%MgF
2+ 40%MgCl
2+ 40%KCl+10%AlP, the amount that adds slag charge is 5% of a consumable electrode rod weight; Slag charge adds preceding 400 ℃ of bakings and is no less than 6 hours, makes its moisture-free and crystal water;
At melting current is 500～600A, voltage is to carry out esr under the condition of 60V, aluminium alloy consumable electrode rod melts gradually, metal drop is in passing through fused slag bath process, and high-temperature fusant is purified, and the final high temperature melt enters into the solidification zone of crystallizer, under the condition of Forced water cooling, solidify, after melting is finished, cut off the electricity supply electroslag aluminum alloy ingot naturally cooling in crystallizer.
The effect of present embodiment: after the refining, the iron level of aluminium alloy is reduced to 0.30%.
Embodiment 2
Present embodiment and embodiment 1 difference part are that the slag charge of employing is: 5%MgF
2+ 40%MgCl
2+ 35%KCl+20%AlP, the amount that adds slag charge is 10% of a consumable electrode rod weight; Melting current is 800～900A, and voltage is 40V; All the other steps are identical with embodiment 1.
The effect of present embodiment: after the refining, the iron level of aluminium alloy is reduced to 0.23%.
Embodiment 3
Present embodiment and embodiment 1 difference part are that the slag charge of employing is: 5%MgF
2+ 40%MgCl
2+ 30%KCl+25%AlP, the amount that adds slag charge is 15% of a consumable electrode rod weight; Melting current is 500～600A, and voltage is 60V; All the other steps are identical with embodiment 1.
The effect of present embodiment: after the refining, the iron level of aluminium alloy is reduced to 0.28%.
Embodiment 4
Present embodiment and embodiment 1 difference part are that the slag charge of employing is: adopt 5%MgF
2+ 50%MgCl
2+ 30%KCl+15%AlP, the amount that adds slag charge is 20% of a consumable electrode rod weight; Melting current is 500～600A, and voltage is 60V; All the other steps are identical with embodiment 1.
The effect of present embodiment: after the refining, the iron level of aluminium alloy is reduced to 0.31%.
Embodiment 5
Present embodiment and embodiment 1 difference part are that the slag charge of employing is: 5%MgF
2+ 40%MgCl
2+ 30%KCl+25%AlPO
4The amount that adds slag charge is 5% of a consumable electrode rod weight; Melting current is 600～700A, and voltage is 50V; All the other steps are identical with embodiment 1.
The effect of present embodiment: after the refining, the iron level of aluminium alloy is reduced to 0.28%.
Embodiment 6
Present embodiment and embodiment 5 difference parts are that the slag charge of employing is: 5%MgF
2+ 40%MgCl
2+ 40%KCl+15%AlPO
4, the amount that adds slag charge is 10% of a consumable electrode rod weight; Melting current is 600～700A, and voltage is 50V; All the other steps are identical with embodiment 1.
The effect of present embodiment: after the refining, the iron level of aluminium alloy is reduced to 0.21%.
Embodiment 7
Present embodiment and embodiment 5 difference parts are that the slag charge of employing is: 10%MgF
2+ 50%MgCl
2+ 30%KCl+10%AlPO
4, the amount that adds slag charge is 15% of a consumable electrode rod weight; Melting current is 800～900A, and voltage is 45V; All the other steps are identical with embodiment 1.
The effect of present embodiment: after the refining, the iron level of aluminium alloy is reduced to 0.25%.
Embodiment 8
Present embodiment and embodiment 1 difference part are that the iron-holder of aluminium alloy is 0.40%; The slag charge that adopts is: 80%Na
3AlF
6+ 20%AlP; The amount that adds slag charge is 5% of a consumable electrode rod weight; Melting current is 900～1000A, and voltage is 40V; All the other steps are identical with embodiment 1.
The effect of present embodiment: after the refining, the iron level of aluminium alloy is reduced to 0.22%.
Embodiment 9
Present embodiment and embodiment 8 difference parts are that the slag charge of employing is: 70%Na
3AlF
6+ 30%AlP; The amount that adds slag charge is 10% of a consumable electrode rod weight; Melting current is 900～1000A, and voltage is 40V; All the other steps are identical with embodiment 1.
The effect of present embodiment: after the refining, the iron level of aluminium alloy is reduced to 0.26%.
Embodiment 10
Present embodiment and embodiment 8 difference parts are that the slag charge of employing is: 90%Na
3AlF
6+ 10%AlP; The amount that adds slag charge is 15% of a consumable electrode rod weight; Melting current is 800～9000A, and voltage is 45V; All the other steps are identical with embodiment 1.
The effect of present embodiment: after the refining, the iron level of aluminium alloy is reduced to 0.25%.
Embodiment 11
Present embodiment and embodiment 8 difference parts are that the slag charge of employing is: 70%Na
3AlF
6+ 30%AlPO
4The amount that adds slag charge is 10% of a consumable electrode rod weight; Melting current is 600～700A, and voltage is 50V; All the other steps are identical with embodiment 1.
The effect of present embodiment: after the refining, the iron level of aluminium alloy is reduced to 0.23%.
Embodiment 12
Present embodiment and embodiment 8 difference parts are that the slag charge of employing is: 90%Na
3AlF
6+ 10%AlPO
4The amount that adds slag charge is 30% of a consumable electrode rod weight; Melting current is 700～800A, and voltage is 55V; All the other steps are identical with embodiment 1.
The effect of present embodiment: after the refining, the iron level of aluminium alloy is reduced to 0.29%.
Claims (4)
1, a kind of method of removing impurity iron in the aluminium alloy comprises the steps: aluminium alloy is poured into the consumable electrode rod, and the consumable electrode rod is put into electroslag furnace, adds slag charge, carries out esr; After melting is finished, cut off the electricity supply, cooling obtains aluminium alloy, it is characterized in that,
Described slag charge is a kind of in the following composition:
5～10％MgF
2+40～50％MgCl
2+30～40％KCl+10～25％AlP，
5～10％MgF
2+40～50％MgCl
2+30～40％KCl+10～25％AlPO
4，
70～90％Na
3AlF
6+10～30％AlP，
70～90％Na
3AlF
6+10～30％AlPO
4；
Percentage ratio in the described composition is weight percentage.
2, the method for impurity iron in the removal aluminium alloy according to claim 1 is characterized in that, the add-on of described slag charge is 5～15% of a consumable electrode rod weight.
3, the method for impurity iron in the removal aluminium alloy according to claim 1 is characterized in that described slag charge is baked to no moisture and crystal water before the adding.
4, the method for impurity iron in the removal aluminium alloy according to claim 1 is characterized in that the electric current of described esr is 500～1000A, and voltage is 40～60V.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN200910054601XA CN101603129B (en) | 2009-07-09 | 2009-07-09 | Method for removing iron impurity from aluminium alloy |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN200910054601XA CN101603129B (en) | 2009-07-09 | 2009-07-09 | Method for removing iron impurity from aluminium alloy |
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| Publication Number | Publication Date |
|---|---|
| CN101603129A true CN101603129A (en) | 2009-12-16 |
| CN101603129B CN101603129B (en) | 2010-08-18 |
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|---|---|---|---|
| CN200910054601XA Expired - Fee Related CN101603129B (en) | 2009-07-09 | 2009-07-09 | Method for removing iron impurity from aluminium alloy |
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Cited By (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN101831556A (en) * | 2010-04-02 | 2010-09-15 | 上海交通大学 | Method for preparing in-situ generated aluminum-base composite based on electroslag remelting process |
| CN102181639A (en) * | 2011-04-26 | 2011-09-14 | 中钢集团吉林铁合金股份有限公司 | One-step method for producing low-carbon/micro-carbon manganese-silicon alloy by using submerged arc furnace |
| CN103667732A (en) * | 2012-09-12 | 2014-03-26 | 上海丰渠特种合金有限公司 | Fluoride-free slag, application thereof, electroslag remelting method and obtained nickel alloy |
| CN104674010A (en) * | 2015-01-21 | 2015-06-03 | 界首市金鹰金属科技有限公司 | Method for removing green renewable harmful elements of aluminum scrap |
-
2009
- 2009-07-09 CN CN200910054601XA patent/CN101603129B/en not_active Expired - Fee Related
Cited By (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN101831556A (en) * | 2010-04-02 | 2010-09-15 | 上海交通大学 | Method for preparing in-situ generated aluminum-base composite based on electroslag remelting process |
| CN102181639A (en) * | 2011-04-26 | 2011-09-14 | 中钢集团吉林铁合金股份有限公司 | One-step method for producing low-carbon/micro-carbon manganese-silicon alloy by using submerged arc furnace |
| CN102181639B (en) * | 2011-04-26 | 2012-11-14 | 中钢集团吉林铁合金股份有限公司 | One-step method for producing low-carbon/micro-carbon manganese-silicon alloy by using submerged arc furnace |
| CN103667732A (en) * | 2012-09-12 | 2014-03-26 | 上海丰渠特种合金有限公司 | Fluoride-free slag, application thereof, electroslag remelting method and obtained nickel alloy |
| CN103667732B (en) * | 2012-09-12 | 2016-01-20 | 上海丰渠特种合金有限公司 | A kind of method of esr |
| CN104674010A (en) * | 2015-01-21 | 2015-06-03 | 界首市金鹰金属科技有限公司 | Method for removing green renewable harmful elements of aluminum scrap |
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|---|---|
| CN101603129B (en) | 2010-08-18 |
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Assignee: Nantong L-S Light Metal Forming Co., Ltd. Assignor: Shanghai Jiao Tong University Contract record no.: 2011320000919 Denomination of invention: Method for removing iron impurity from aluminium alloy Granted publication date: 20100818 License type: Exclusive License Open date: 20091216 Record date: 20110705 |
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Granted publication date: 20100818 Termination date: 20190709 |