CN1389583A - Filtering method of non-metallic inclusion in aluminium melt - Google Patents
Filtering method of non-metallic inclusion in aluminium melt Download PDFInfo
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- CN1389583A CN1389583A CN02111574A CN02111574A CN1389583A CN 1389583 A CN1389583 A CN 1389583A CN 02111574 A CN02111574 A CN 02111574A CN 02111574 A CN02111574 A CN 02111574A CN 1389583 A CN1389583 A CN 1389583A
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- Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
- Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
- Y02P—CLIMATE CHANGE MITIGATION TECHNOLOGIES IN THE PRODUCTION OR PROCESSING OF GOODS
- Y02P10/00—Technologies related to metal processing
- Y02P10/20—Recycling
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Abstract
The invention refers to a method of filtering out the larded nonmetallic substances in the aluminum melt. The method is as follows: design an industrial centrifuger which can continuously filter the aluminium melt, use the ceramic material to make two centrifugal cylinders both with holes on their sides whose diameters are different, place the cylinder-type foaming ceramics in the center of the small-diameter cylinder, then place the coated ceramic particles between the small cylinder wall and the cylinder-type foaming ceramics, then cover the cylinder whose diameter is a little bigger outside the smaller cylinder, and the space between them is used to contains the filtered aluminum melt which finally is extracted out by the guide tube.
Description
Technical field: what the present invention relates to is a kind of method of filtering non-metallic inclusion, and particularly a kind of method of filtering nonmetallic inclusions from aluminum melts 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).The general content of inclusion in fine aluminium and the aluminium alloy is all more than 0.1%, and the size major part of inclusion all is greater than 10 microns.In the foundry industry, what generally use is glass fiber mesh, ceramic foam filter and deep-bed filter aluminum filtration melt.These strainer aluminum filtration melts all are not under the impressed pressure condition, rely on the molten aluminium own wt to flow through porcelain filter, but this filter type is deposited the inclusion size that can not remove in the molten aluminium less than 10～15 microns.In order to improve the filtration efficiency of strainer, when reducing the aperture of strainer, the nonwetting property of molten aluminium and porcelain filter can hinder molten aluminium and rely on own wt to flow through strainer, therefore must apply external force.The aluminum filtration of exerting pressure at present melt mainly is in the laboratory, with rare gas element molten aluminium exerted pressure, but this filter type exists shortcomings such as throughput of filtration is low, discontinuous filtration, thereby restrict it in industrial application.The applicant has applied for patent on January 29th, 2002, application number is: 02110684.3, name is called: with the method for ceramic filter nonmetallic inclusions from aluminum melts, this technology uses the viscous coating ceramic particle at no pressure condition, rely on the molten aluminium own wt to flow through S type runner filtration unit, can effectively catch the inclusion of size, but it is not high less than the efficient of 7 μ m inclusiones to catch size greater than 7 μ m.The surface tension of molten aluminium and viscosity are all bigger, rely on the aperture of own wt and porcelain filter to be difficult to molten aluminium is dispersed into very thin thread.When ceramic particle mesopore (ceramic particle size) was relatively large, when molten aluminium flows through the ceramic particle mesopore, being rolled in thread intermediary fine foreign matter can contacted filter hole wall, but along with molten aluminium flows through porcelain filter and is not hunted down.If reduce the size of ceramic particle, molten aluminium relies on own wt to be difficult to flow through the ceramic particle mesopore, does not reach the filtration, purification effect on the contrary.Therefore, under no pressure condition, acquire a certain degree of difficulty with the inclusion of coating ceramic particle capture size less than 7 μ m.
Summary of the invention and embodiment: the present invention is directed to the deficiencies in the prior art and defective, a kind of method of filtering nonmetallic inclusions from aluminum melts is provided, coating is carried out on surface to porcelain filter in the whizzer and ceramic particle, improve the wettability between molten aluminium and the porcelain filter, utilize coating on the filter surfaces to catch non-metallic inclusion in the molten aluminium simultaneously.The inventive method is specific as follows: design one can the continuous filtration molten aluminium industrial centrifugal machine, two centrifugal cylinders that stupalith ramming diameter is different, the side of cylinder is porose, the cylinder shape foamed ceramics is placed on the little cylinder center of diameter, be placed on the coating ceramic particle in the little cylinder then and between the foamed ceramics, again the bigger a little ramming cylindrical sleeve of diameter in the less cylinder outside of diameter, the space between them holds the molten aluminium after overanxious, draws by conduit then.
Insulation heating shell is arranged in the large cylinder outside, insulation heating lid is arranged above the cylinder, charging opening is arranged at the center of insulation cover.Insulation heating lid is also arranged below the cylinder, conduit is arranged in the middle of lid, conduit and large cylinder are connected with space between the little cylinder.The bottom insulation cover is connected with centrifugal shaft, and there is conduit the centre of centrifugal shaft, and there is heating unit the outside of conduit, in the heating unit outside thermal insulation layer is arranged, it is placed in the thicker steel pipe of tube wall, and there are rolling bearing and power wheel in the steel pipe outside, with belt centrifugal shaft is connected with the motor that can regulate rotating speed.
Nonwetting property restriction between ceramic surface and the molten aluminium relies on and reduces the filter pore size trapped inclusions.Under no pressure condition with coating ceramic particulate S type runner filter plant aluminum filtration melt is housed, when molten aluminium flows through this equipment, be divided into the relatively large thread of size, tiny inclusion is rolled in be not filtered device in the thread and catches, therefore, difficult for catching in the molten aluminium size less than 7 μ m inclusiones.Use whizzer deep-bed filtration molten aluminium, can reduce the aperture (the perhaps size of ceramic particle) of porcelain filter relatively.The pressure that whizzer produces is applied on the molten aluminium equably, molten aluminium is dispersed into very tiny thread, make inclusion be difficult to be rolled in the thread, and porcelain filter or ceramic particle are carried out coating, thereby can effectively catch size less than 5 μ m inclusiones.
The present invention has substantive distinguishing features and marked improvement, the centrifugal force that whizzer of the present invention produces can be applied on the molten aluminium equably, make molten aluminium can flow through the less relatively porcelain filter in aperture, and aluminum filtration melt continuously, improved the wettability between molten aluminium and the porcelain filter surface, improved porcelain filter and caught the ability of inclusion, used industrial centrifugal deep-bed filtration machine can remove size in the molten aluminium effectively greater than the non-metallic inclusion of 5 μ m.
Provide following three embodiment in conjunction with content of the present invention:
| Embodiment | Filtration temperature ℃ | Centrifugal pressure | Centrifuge speed | Dust removal rate (%) |
| Ceramic particle (9 μ m) | ????720 | ?0.2MP | ?2532 | ????100 |
| Ceramic particle (6 μ m) | ????720 | ?0.3MP | ?3101 | ????100 |
| Coating ceramic particle (100 μ m) | ????720 | ?0.08MP | ?1000 | ????96 |
Claims (2)
1, a kind of method of filtering nonmetallic inclusions from aluminum melts, it is characterized in that method is specific as follows: design one can the continuous filtration molten aluminium industrial centrifugal machine, two centrifugal cylinders of stupalith ramming, the side of cylinder is porose, the cylinder shape foamed ceramics is placed on the little cylinder center of diameter, be placed on the coating ceramic particle in the little cylinder then and between the foamed ceramics, again the bigger a little ramming cylindrical sleeve of diameter in the less cylinder outside of diameter, space between them holds the molten aluminium after overanxious, draws by conduit then.
2, the method for this filtration nonmetallic inclusions from aluminum melts according to claim 1, it is characterized in that the pressure that whizzer produces is applied on the molten aluminium equably, molten aluminium is dispersed into very tiny thread, and porcelain filter or ceramic particle are carried out coating.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN02111574A CN1389583A (en) | 2002-04-30 | 2002-04-30 | Filtering method of non-metallic inclusion in aluminium melt |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN02111574A CN1389583A (en) | 2002-04-30 | 2002-04-30 | Filtering method of non-metallic inclusion in aluminium melt |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN1389583A true CN1389583A (en) | 2003-01-08 |
Family
ID=4741642
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN02111574A Pending CN1389583A (en) | 2002-04-30 | 2002-04-30 | Filtering method of non-metallic inclusion in aluminium melt |
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| CN (1) | CN1389583A (en) |
Cited By (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102069147A (en) * | 2011-01-30 | 2011-05-25 | 南昌航空大学 | Method for composite-filtering multiple filter media in aluminum-alloy-melt centrifuge field |
| CN102105609A (en) * | 2008-06-16 | 2011-06-22 | 博韦尔公开有限公司 | Improved method for filtering molten aluminum and molten aluminum alloys |
| CN102139348A (en) * | 2011-03-16 | 2011-08-03 | 南昌航空大学 | Composite filtering method of a plurality of filter media in centrifugal force field of steel melt |
| CN103627909A (en) * | 2013-12-10 | 2014-03-12 | 南昌航空大学 | Composite filtering method for copper and copper alloy melts through centrifugal force field |
| CN110819822A (en) * | 2019-09-17 | 2020-02-21 | 牛强 | Electric heating aluminum smelting device |
-
2002
- 2002-04-30 CN CN02111574A patent/CN1389583A/en active Pending
Cited By (10)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102105609A (en) * | 2008-06-16 | 2011-06-22 | 博韦尔公开有限公司 | Improved method for filtering molten aluminum and molten aluminum alloys |
| CN102105609B (en) * | 2008-06-16 | 2013-07-03 | 博韦尔公开有限公司 | Improved method for filtering molten aluminum and molten aluminum alloys |
| CN102069147A (en) * | 2011-01-30 | 2011-05-25 | 南昌航空大学 | Method for composite-filtering multiple filter media in aluminum-alloy-melt centrifuge field |
| CN102069147B (en) * | 2011-01-30 | 2013-01-16 | 南昌航空大学 | Method for composite-filtering multiple filter media in aluminum-alloy-melt centrifuge field |
| CN102139348A (en) * | 2011-03-16 | 2011-08-03 | 南昌航空大学 | Composite filtering method of a plurality of filter media in centrifugal force field of steel melt |
| CN102139348B (en) * | 2011-03-16 | 2013-08-07 | 南昌航空大学 | Composite filtering method of a plurality of filter media in centrifugal force field of steel melt |
| CN103627909A (en) * | 2013-12-10 | 2014-03-12 | 南昌航空大学 | Composite filtering method for copper and copper alloy melts through centrifugal force field |
| CN103627909B (en) * | 2013-12-10 | 2015-10-21 | 南昌航空大学 | Copper and its alloy melt spun field of force combined filtration method |
| CN110819822A (en) * | 2019-09-17 | 2020-02-21 | 牛强 | Electric heating aluminum smelting device |
| CN110819822B (en) * | 2019-09-17 | 2024-03-19 | 牛强 | Electric heating aluminum smelting device |
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