CN1139666C - Stirring active flux for filtering purification to elimiante foreign impurity from aluminium melt - Google Patents
Stirring active flux for filtering purification to elimiante foreign impurity from aluminium melt Download PDFInfo
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- CN1139666C CN1139666C CNB011392541A CN01139254A CN1139666C CN 1139666 C CN1139666 C CN 1139666C CN B011392541 A CNB011392541 A CN B011392541A CN 01139254 A CN01139254 A CN 01139254A CN 1139666 C CN1139666 C CN 1139666C
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- flux
- aluminium
- aluminum melt
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Abstract
The present invention relates to a stir activity fluxing agent for filtering and purifying impurities in aluminum melt, which belongs to the field of casting. The present invention has the ingredient formula and the weight percentage of 30 to 35 wt% of NaCl, 30 to 35 wt% of KCl, 10 to 18 wt% of NaAlF6, 5 to 10 wt% of NaF, 4 to 5 wt% of CaCl2, 2 to 7 wt% of NaCO3, 0 to 3 wt% of KCO3 and 4 to 5 wt% of KBF4. The present invention has substantive characteristics and obvious progress; the present invention can avoid the impurities returning the aluminum melt, avoid secondary impurity generation because of the reaction of the aluminum melt and oxygen and water vapor in the air and avoid the reaction of a fusion fluxing agent and the aluminum melt in stir processes and can effectively remove hazardous element Fe in the aluminum melt.
Description
Technical field: what the present invention relates to is the stirring active flux of a kind of active flux, particularly a kind of filtering purification to elimiante foreign impurity from aluminium melt, belongs to casting field.
Background technology: aluminium is a kind of very active metal, and easy and steam reaction generates hydrogen and oxide inclusion (Al in fusion process
2O
3).These non-metallic inclusions are very big to the aluminum products performance hazards, and therefore, aluminium melt purifying is one of main path that improves the aluminium quality.Flux method remove be mingled with gas be a kind of aluminium melt purifying means commonly used, have advantages such as technology is easy, expense is cheap, therefore, it is necessary to research and develop novel degasification, impurity removing technology.The general content of inclusion in the commercial-purity aluminium is all more than 0.1%, and the size major part of inclusion all is greater than 10 microns.The international level of removing inclusion, the inclusion content in the molten aluminium is 0.02%, the size of inclusion is less than 7 microns.Flux component commonly used in the aluminium processing industry mainly contains villaumite, villiaumite, shortcoming be these fused salts when fusing and the chemical reaction efficiency of inclusion low.Find by literature search, people such as Fu Gaosheng to the active flux integral part that uses at " China YouSe Acta Metallurgica Sinica " Vol.11, No.3 Jun 2000, P433-436 is described, promptly comprise villaumite, villiaumite, carbonate, vitriol and a spot of fusing assistant, this technical disadvantages is because vitriol is the strong oxidizing property fused salt, with molten aluminium chemical reaction can take place, in addition, employed flux can not reduce flux harmful element Fe above.
Summary of the invention and embodiment: at the deficiencies in the prior art and defective, the invention provides a kind of stirring active flux of filtering purification to elimiante foreign impurity from aluminium melt, adopt stirring active flux filtration, purification molten aluminium, can disperse molten aluminium preferably during with the active flux of this new prescription, and the inclusion in the molten aluminium has higher ground chance contact active flux, the main body inclusion (Al in this active flux and the molten aluminium
2O
3) reaction and not with molten aluminium reaction, thereby reach the purpose of efficient impurity removal.Use the active flux of this new prescription, the filtration, purification molten aluminium can reach the efficient impurity removal effect under stirring molten flux condition, to satisfy the high-quality aluminium of large-scale commercial production.This active flux composition formulation weight per-cent is: NaCl:30-35%, KCl:30-35%, NaAlF
610-18%, NaF5-10%, CaCl
24-5%, NaCO
32-7%, KCO
30-3%, KBF
44-5%.
Adopt stirring active flux method aluminum filtration melt, put into two plumbago crucibles in resistance furnace: a crucible is put into active flux; An other crucible commercial-purity aluminium, put into flux when aluminium ingot soon melts by the time again as insulating covering agent, after commercial-purity aluminium and fused salt all melt, electric blender is put in the flux crucible, in stirring the flux process, add molten aluminium, the flux of rotation is dispersed into tiny aluminium to molten aluminium and drips, increased the chance that molten aluminium contacts with flux, in addition, molten aluminium is dispersed into tiny aluminium by flux and drips in whipping process, and these aluminium drop in can coalescence in the rotation flux, coalescence and being disperseed can make nonmetallic inclusions from aluminum melts have an opportunity to be distributed to aluminium like this and drip on the surface then.Aluminium drip the flux that is in rotation in, surface that aluminium drips and flux surface constantly are updated, like this can be from the inclusion new distribution aluminium drips, be distributed in flux-aluminium and drip on the interface thereby make those be distributed in higher ground of inclusion chance in the molten aluminium.Viscosity and capillary influence that the deployment conditions of molten aluminium in rotation flux mainly is subjected to rotating speed, smelting temperature, flux and the molten aluminium of agitator.In addition, each flux filtration that increases purifies number of times, can make molten aluminium once and again be dispersed into tiny aluminium by flux drips, reappear aluminium and drip interface with flux, can make inclusion in the molten aluminium constantly be distributed to aluminium like this drips on the surface, and be attached to the lip-deep aluminium film of inclusion and washed away by active flux easily, inclusion is entered in the flux easily.
The present invention has substantive distinguishing features and marked improvement, adopt stirring active flux method filtration, purification molten aluminium, can fully touch inclusion in the molten aluminium, and react with inclusion, reaction product is dissolved in the molten flux, avoid inclusion to turn back in the molten aluminium again, because the density of molten aluminium is greater than the density of flux, aluminium drips and can sink to below the molten flux, and flux layer have enough thickness avoid below rotation above molten aluminium translates into, avoid oxygen and steam reaction in molten aluminium and the air like this and generation secondary inclusion thing.Active flux does not contain strong oxidizing property material (vitriol), thereby avoids molten flux in whipping process and molten aluminium reaction.In active flux, add KBF
4When the filtration, purification molten aluminium, can efficiently remove harmful element Fe in the molten aluminium.
Below in conjunction with the invention provides three embodiment:
| Composition | Embodiment | NaCl | KCl | NaAlF 6 | NaF | CaCl 2 | NaCO 3 | KCO 3 | KBF 4 |
| Content (wt%) | 1 | 35 | 35 | 10 | 7 | 4 | 2 | 3 | 4 |
| 2 | 30 | 30 | 18 | 10 | 4.5 | 2 | 1 | 4.5 | |
| 3 | 32.5 | 32.5 | 13 | 5 | 5 | 7 | 0 | 5 |
Filtering a flux consumption is 300g, and filtering each time and all being to use new flux, aluminium ingot consumption is 900g.Three embodiment obtain the effect such as the following table of removal of impurities respectively:
| Embodiment | Filtration temperature ℃ | Filter number of times | The flux consumption | Rotating speed | Dust removal rate (%) |
| 1 | 720 | 2 | 600 | 500 | 85 |
| 2 | 720 | 2 | 600 | 500 | 83 |
| 3 | 720 | 2 | 600 | 500 | 84 |
Claims (1)
1, a kind of stirring active flux of filtering purification to elimiante foreign impurity from aluminium melt is characterized in that composition formulation weight per-cent is: NaCl:30-35%, KCl:30-35%, NaAlF
610-18%, NaF5-10%, CaCl
24-5%, NaCO
32-7%, KCO
30-3%, KBF
44-5%.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CNB011392541A CN1139666C (en) | 2001-12-27 | 2001-12-27 | Stirring active flux for filtering purification to elimiante foreign impurity from aluminium melt |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CNB011392541A CN1139666C (en) | 2001-12-27 | 2001-12-27 | Stirring active flux for filtering purification to elimiante foreign impurity from aluminium melt |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN1362533A CN1362533A (en) | 2002-08-07 |
| CN1139666C true CN1139666C (en) | 2004-02-25 |
Family
ID=4675176
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CNB011392541A Expired - Fee Related CN1139666C (en) | 2001-12-27 | 2001-12-27 | Stirring active flux for filtering purification to elimiante foreign impurity from aluminium melt |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN1139666C (en) |
Families Citing this family (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN100425716C (en) * | 2006-09-25 | 2008-10-15 | 中国铝业股份有限公司 | Aluminium-alloy iron-removing solvent |
| CN102127647A (en) * | 2010-10-11 | 2011-07-20 | 镇江市丹徒区振华熔剂厂 | Multifunctional demagging agent |
| CN102021353B (en) * | 2010-12-06 | 2013-05-01 | 中国兵器工业第五二研究所 | Purification method of aluminum alloy welding wire raw material melt and special melting agent thereof |
| CN105316508B (en) * | 2015-10-21 | 2018-07-27 | 广西平果铝合金精密铸件有限公司 | A kind of aluminum refining agent of the erbium of lanthanum containing cerium |
-
2001
- 2001-12-27 CN CNB011392541A patent/CN1139666C/en not_active Expired - Fee Related
Also Published As
| Publication number | Publication date |
|---|---|
| CN1362533A (en) | 2002-08-07 |
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