CN104060101A - Filtering purifying method and device for light alloy melt heavy infiltration solid inclusions - Google Patents
Filtering purifying method and device for light alloy melt heavy infiltration solid inclusions Download PDFInfo
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- CN104060101A CN104060101A CN201310094373.5A CN201310094373A CN104060101A CN 104060101 A CN104060101 A CN 104060101A CN 201310094373 A CN201310094373 A CN 201310094373A CN 104060101 A CN104060101 A CN 104060101A
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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
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- Y02P—CLIMATE CHANGE MITIGATION TECHNOLOGIES IN THE PRODUCTION OR PROCESSING OF GOODS
- Y02P10/00—Technologies related to metal processing
- Y02P10/20—Recycling
Abstract
A filtering purifying method and device for light alloy melt heavy infiltration solid inclusions. The device comprises a crucible, a partitioning plate in the crucible, a support frame, and a filtering pore plate; a crucible molten pool is partitioned into a pre-treatment chamber, a filtering chamber, and a post-treatment chamber; the filtering pore plate in the filtering chamber inclines in the post-treatment chamber direction and is placed on the sealed support frame, and an included angle between the filtering pore plate and the crucible molten pool surface is more than 0 degree and less than 90 degrees. Light alloy melt from the pre-treatment chamber flows through the filtering chamber from bottom to top at a low speed; heavy infiltration solid inclusions in the light alloy melt are blocked by the filtering pore plate to be below the filtering pore plate so as to realize the purification of the melt solid inclusions; the inclusions accumulated below the filtering pore plate aggregate and fall with the increase of the accumulating amount, and thus self-purification of the filtering pore plate is realized. The filtering method solves the problem of filtering efficiency attenuation for filtering media caused by obstruction of filtering pores by solid inclusions in metal melt filtering and purification, enables the purification process to run continuously, and reduces the purification maintenance cost and workload.
Description
Technical field
The present invention relates to filter purification method and device thereof that light alloy melt heavy infiltrates solid impurity, belong to light metal melting and manufacture field thereof.
Technical background
In recent years, light alloy material more and more comes into one's own and applies, but the existence of inclusion in light alloy, can reduce intensity, plasticity and the erosion resistance of material.For reducing the inclusion in light alloy, developed at present multiple light alloy cleaning molten method, as flux method, settled process, flotation process and filtration method etc., wherein filtration method is acknowledged as the most effective.
By literature search, obtain with Publication about Document and the present invention the most approaching:
Document 1: " applied research of foam ceramic filter technology in high standard Mg alloy castings is produced " is published in 19～21 pages of < < Special Processes of Metal Castings and non-ferrous alloy > > the 2nd phases of nineteen ninety-five, relates to magnesium melt filtration and uses filter of purifying magnesium oxide foam pottery and mounting design thereof.
Document 2: " research of magnesium alloy purification techniques ", be published in 5～7 pages of < < metal forming technology > > the 5th phase the 20th volumes in 2005, relate to magnesium alloy fused mass and purify and use filter of purifying magnesium oxide foam pottery;
From recognizing above and other pertinent literature: at present, it is filter of purifying magnesium oxide foam pottery comparatively widely that light alloy melt filtration is used, and its groundwork is partly purifying magnesium oxide foam pottery filter or purifying magnesium oxide foam pottery screen plate.When the filter of purifying magnesium oxide foam pottery of light alloy melt by being placed therein, it is separated to there is impurity and magnesium melt in the multiple mechanisms of action such as purifying magnesium oxide foam pottery filter or the dependence of purifying magnesium oxide foam pottery screen plate stop, filter cake, absorption, reaches the object that purifies magnesium melt.
Yet because purifying magnesium oxide foam pottery filter or purifying magnesium oxide foam pottery screen plate are three-dimensional continuous net-shaped structure, internal passages complications are changeable, tortuous roundabout connection between Kong Yukong.Therefore, use filter of purifying magnesium oxide foam pottery to filter light alloy melt after for some time, its inner filtration channel can be filtered the impurity particle of holding back and stop up, not only reduce filtration efficiency, also the pressure that makes strainer import and export two ends increases rapidly, cause that inlet end light alloy bath surface raises, severe patient will cause light alloy melt to overflow in crucible (1); Due to the singularity of purifying magnesium oxide foam pottery structure, no matter filter in which way, the impurity particle that accumulates in filter media inside is all difficult to from foamed ceramics, come off voluntarily.Therefore,, in order to keep affinability, must regularly replace filtration medium; Except increasing cost, while changing operation, also easily damage the floamed ceramics filtrating piece that fragility is very large.
By literature search, obtain with Publication about Document relevant to content of the present invention:
The rare gas element that magnesium alloy fused mass blowing method of refining is is 99.9%～99.999% by purity passes in magnesium melt continuously.Referring to " risk analysis of magnesium alloy smelting, castingprocesses ", be published in 75～78 pages of < < China Safety Science journal > > the 16th the 5th phases of volume of 200 year May and " experimental study of cast magnesium alloys rotary blowing degasification " and be published in 139～141 pages of < < Special Processes of Metal Castings and non-ferrous alloy > > the 26th the 3rd phases of volume in 2006.
The standing refining of magnesium melt is to make the standing 5～30min of magnesium melt.Referring to patent: 02136201.7 and " non-metallic inclusion in magnesium alloy and purifying method thereof " be published in described in 613～616 pages of < < foundry engieering > > June in 2006.
The refining of magnesium Melt Stirring is to make stirring-head continuously stirring magnesium melt in magnesium melt.Referring to patent: 03127071.9 and " risk analysis of magnesium alloy smelting, castingprocesses " be published in 75～78 pages of < < China Safety Science journal > > the 16th the 5th phases of volume of 200 year May.
Summary of the invention
The object of the invention is to for deficiency of the prior art, and a kind of light alloy melt filtration method of refining and device thereof are provided.Realize the continuous smooth and easy filtration of light alloy melt.
For achieving the above object, the process of the filter method of this light alloy melt is: preheating → fusing → pre-treatment (in removal buoyancy and do not infiltrate solid impurity) → filtration (remove non-heavy and infiltrate impurity), it is characterized in that the method in the following order step carry out:
1. the light alloy after preheating and drying is put into pre-treatment chamber (2) heat fused of crucible, and be warming up to 700～750 ℃;
2. one or both in use blowing refining, standing refining, stirring refining or three kinds of method pre-treatment light alloy melts;
3., after pre-treatment completes, make light alloy melt to be greater than 0 and the flow velocity that is less than 0.1 meter per second is fixed on the filter mechanism in crucible by sealing from bottom to top.
Wherein, described upper buoyancy impurity refers to that impurity density is larger than light alloy fusant density, non-upper buoyancy impurity refers to impurity density and light alloy fusant density quite or is larger than light alloy fusant density, described blowing refining, standing refining, stirs refining and sees document related to the present invention in technical background.
Implement the device of above-mentioned light alloy melt filtration, comprise crucible (1), be fixed on the dividing plate (3) in crucible (1), the pre-treatment chamber (2) that this dividing plate (3) and crucible (1) form; Wherein in the crucible between dividing plate (3) and light alloy melt exit end (8), sealing is fixed with filter mechanism, between this filter mechanism and dividing plate (3), form the filtration chamber (4) of light alloy melt, and form the after-processing chamber (7) of filtering rear light alloy melt with the exit end (8) of light alloy melt; This filter mechanism comprises orifice filter (6) and bracing frame (5) thereof, the rear and front end of bracing frame (5) and bottom seal respectively and are fixed on before and after crucible (1) on inwall and bottom, and this orifice filter (6) tilts and is greater than 0 ° and be less than 90 with the angle of the upper plane of crucible (1) to after-processing chamber (7)
osealing is shelved on bracing frame (5).
On the right bracing frame (5) of the bracing frame (5) adjacent with dividing plate (3) bottom described in the filtration unit of described light alloy melt and orifice filter (6), all there is melt-flow to cross passage.
On orifice filter (6) described in described light alloy melt filter, be distributed with the through hole that aperture is 0.1～5mm.
The present invention compares with using filter of purifying magnesium oxide foam pottery in prior art, and difference is mainly:
First be to use to be with foraminate plate for filtration medium; Next is the difference of the filtration unit of use, in melt flow direction, allows light alloy melt pass through the orifice filter (6) in filter mechanism from bottom to top with low speed; Again make the processing mode difference to melt, the present invention is before filtration, adopts and is blown into gas refinement, standing refining, one or both in stirring refining or three kinds of method pre-treatment light alloy melts.
By contrast, the invention has the advantages that:
1. use and be with foraminate plate as filtration medium.Orifice filter (6) is through-hole structure, and non-serpentine roundabout tridimensional network form, can prevent that Particulate Inclusion from gathering and stopping up filter pore in orifice filter (6), realizes the continuous filtration of light alloy melt; Orifice filter (6) is cheap, not fragile, easy to maintenance simultaneously.
2. before filtering, adopt and be blown into gas refinement, standing refining, one or both in stirring refining or three kinds of method pre-treatment light alloy melts.This can not only improve the refining effect of light alloy melt, and can remove upper buoyancy impurity and gas in light alloy melt, therefore, has prevented the obstruction of upper buoyancy impurity to orifice filter (6) inner filtration passage.
3. between filter mechanism and dividing plate (3), light alloy melt filtration chamber (4) is set.Pretreated light alloy melt flows into filtration chamber (4) from top to bottom from dividing plate (3) upper end, then from filtration chamber (4) bottom, pass through the orifice filter (6) filter mechanism from bottom to top, melt inside can have greatly changed because flowing to variation, extremely be conducive to the purification of light alloy melt, be beneficial to especially the sinking of settleability impurity, improve the refining effect of light alloy melt.
4. make light alloy melt pass through orifice filter (6) from bottom to top with extremely low flow velocity, to increase filter effect and to realize the self-purification of orifice filter (6).According to calculating, when pretreated light alloy melt is to be greater than 0 and the flow velocity that is less than 0.1 meter per second from bottom to top during the orifice filter (6) by filter mechanism, be wherein greater than that non-upper buoyancy impurity that orifice filter (6) aperture and part be less than orifice filter (6) aperture is blocked on the fluoran stream surface that is trapped in orifice filter (6) and can sedimentation.Use is held slant setting but not level or the vertical orifice filter (6) of placing to after-processing chamber (7), can impel the non-upper buoyancy impurity particle in light alloy melt to increase in upper reunion of orifice filter (6), when the impurity particle weight after the increase of reuniting or size acquire a certain degree, under self gravitation effect, from orifice filter (6), come off, realize the self-purification of orifice filter (6) medium.
In sum, the present invention makes full use of the individual layer of orifice filter (6) structure and the singularity of filtration unit, and use composite refining method to process light alloy melt, prevented to greatest extent the obstruction of impurity particle to filtration medium in light alloy melt, realize the continuous smooth and easy filtration of light alloy melt, and the high-quality purification light alloy melt of energy, the light alloy melt after this filtration method of refining is processed is better than and uses the light ceramic foam filter filter effect of pure zirconia.
Accompanying drawing explanation
Fig. 1 is the main sectional view of the filtration unit of a kind of light alloy melt provided by the invention
Fig. 2 is the vertical view of Fig. 1
In Fig. 1
1-crucible; 2-pre-treatment chamber; 3-dividing plate; 4-filtration chamber; 5-bracing frame; 6-orifice filter; 7-after-processing chamber; 8-exit end;
Embodiment
Below in conjunction with embodiment, the present invention is further illustrated.
Filter method and the filtration unit thereof of embodiment 1:AZ91D light alloy melt.Its filter method in the following order step carries out:
1. the AZ91D light alloy after preheating is placed in to the interior heat fused in crucible (1) pre-treatment chamber (2), and is warming up to 720 ℃;
2. with the rare gas element that purity is 99.99%, pass into pre-treatment light alloy melt in light alloy melt;
3. make light alloy melt after blowing refining by sealing, be fixed on the filter mechanism in crucible (1) from bottom to top with the flow velocity of 0.01 meter per second.
This filtration unit comprises crucible (1), be fixed on the dividing plate (3) in crucible (1), the pre-treatment chamber (2) being formed by this dividing plate (3) and crucible (1), in crucible (1) between dividing plate (3) and light alloy melt exit end (8), be provided with sealing and be fixed on the filter mechanism in crucible (1); By this filter mechanism and dividing plate (3), formed the filtration chamber (4) of light alloy melt, by the exit end (8) of this filter mechanism and the interior light alloy melt of crucible (1), formed the after-processing chamber (7) of the rear light alloy melt of filtration.Wherein filter mechanism comprises orifice filter (6) and bracing frame (5) thereof; The rear and front end of bracing frame (5) and bottom seal respectively and are fixed on before and after crucible (1) on inwall and bottom, and all have melt-flow to cross passage on bracing frame (5) bottom adjacent with dividing plate (3) and the right bracing frame (5) of orifice filter (6); This orifice filter (6) to after-processing chamber (7) end tilt and with the angle of the upper plane of crucible (1) be that 45 ° of sealings are shelved on melt-flow to cross the bracing frame of passage (5) upper, and be distributed with the through hole that aperture is 4mm.
Filter method and the filtration unit thereof of embodiment 2:AZ31B light alloy melt, its filter method in the following order step carries out:
1. the AZ31B light alloy after preheating is placed in to the interior heat fused in crucible (1) pre-treatment chamber (2), and is warming up to 750 ℃;
2. first with the rare gas element that purity is 99.9%, pass in light alloy melt, then use standing method of refining pre-treatment magnesium alloy fused mass;
3. make light alloy melt after above-mentioned processing by sealing, be fixed on the filter mechanism in crucible (1) from bottom to top with the flow velocity of 0.09 meter per second.
This filtration unit comprises crucible (1), be fixed on the dividing plate (3) in crucible (1), the pre-treatment chamber (2) that this dividing plate (3) and crucible (1) form, in crucible (1) between dividing plate (3) and light alloy melt exit end (8), be provided with sealing and be fixed on the filter mechanism in crucible (1), by this filter mechanism and dividing plate (3), form light fit filtration chamber (4), the after-processing chamber (7) of light alloy melt after being filtered by exit end (8) formation of this filter mechanism and the interior light alloy melt of crucible (1).Wherein filter mechanism comprises orifice filter (6) and bracing frame (5) thereof; The rear and front end of bracing frame (5) and bottom seal respectively and are fixed on before and after crucible (1) on inwall and bottom, and all have melt-flow to cross passage on bracing frame (5) bottom adjacent with dividing plate (3) and the right bracing frame (5) of orifice filter (6); This orifice filter (6) to after-processing chamber (7) end tilt and with the angle of the upper surface of crucible (1) be that 75 ° of sealings are shelved on melt-flow to cross the bracing frame of passage (5) upper, and be distributed with the through hole that aperture is 2mm.
Embodiment 3:AZ81 light alloy melt filtration method and filtration unit thereof, its filter method in the following order step carries out:
1. the AZ81 light alloy after preheating is placed in to the interior heat fused in crucible (1) pre-treatment chamber (2), and is warming up to 710 ℃;
2. first with blowing limit, limit, stir refining pre-treatment light alloy melt, purity inert gas used is 99.99%.
3. make light alloy melt after above-mentioned processing by sealing, be fixed on the filter mechanism in crucible (1) from bottom to top with the flow velocity of 0.05 meter per second.
This filtration unit comprises crucible (1), be fixed on the dividing plate (3) in crucible (1), the pre-treatment chamber (2) that this dividing plate (3) and crucible (1) form, in crucible (1) between dividing plate (3) and light alloy melt exit end (8), be provided with sealing and be fixed on the filter mechanism in crucible (1), by this filter mechanism and dividing plate (3), formed the filtration chamber (4) of light alloy melt, by the exit end (8) of this filter mechanism and the interior light alloy melt of crucible (1), formed the after-processing chamber (7) of the rear light alloy melt of filtration.Wherein filter mechanism comprises orifice filter (6) and bracing frame (5) thereof; The rear and front end of bracing frame (5) and bottom seal respectively and are fixed on before and after crucible (1) on inwall and bottom, and all have melt-flow to cross passage on bracing frame (5) bottom adjacent with dividing plate (3) and the right bracing frame (5) of orifice filter (6); This orifice filter (6) to after-processing chamber (7) end tilt and with the angle of the upper surface of crucible (1) be that 10 ° of sealings are shelved on melt-flow to cross the bracing frame of passage (5) upper, and be distributed with the through hole that aperture is 0.5mm.
Claims (4)
1. a light alloy melt heavy infiltrates filter purification method and the device of solid impurity, it is characterized in that the method in the following order step carry out: a. puts into the light alloy after preheating and drying pre-treatment chamber (2) heat fused of crucible (1), and is warming up to 700～750 ℃;
B. one or both in use blowing refining, standing refining, stirring refining or three kinds of method pre-treatment light alloy melts;
C., after pre-treatment completes, make light alloy melt to be greater than 0 and the flow velocity that is less than 0.1 meter per second is fixed on the orifice filter (6) in crucible (1) by sealing from bottom to top.
2. a kind of light alloy melt heavy according to claim 1 infiltrates filter purification method and the device of solid impurity, this device comprises crucible (1), be fixed on the dividing plate (3) in crucible (1), the pre-treatment chamber (2) being formed by this dividing plate (3) and crucible (1); It is characterized in that: in the crucible (1) between dividing plate (3) and light alloy melt exit end (8), sealing is fixed with filter mechanism, between this filter mechanism and dividing plate (3), form the settling pocket (4) of light alloy melt, and form the subsequent processes chamber (7) of filtering rear light alloy melt with the exit end (8) of light alloy melt; This filter mechanism comprises orifice filter (6) and bracing frame (5) thereof, the rear and front end of bracing frame (5) and bottom seal respectively and are fixed on before and after crucible (1) on inwall and bottom, and this orifice filter (6) is greater than 0 ° and be less than 90 ° of sealings and be shelved on bracing frame (5) to follow-up treatment chamber (7) bottom angled and with the angle of the upper plane of crucible (1).
3. a kind of light alloy melt heavy according to claim 1 infiltrates filter purification method and the device of solid impurity, it is characterized in that: on the right bracing frame (5) of bracing frame (5) bottom adjacent with dividing plate (3) and orifice filter (6), all have melt-flow to cross passage.
4. a kind of light alloy melt heavy according to claim 1 infiltrates filter purification method and the device of solid impurity, it is characterized in that being distributed with on orifice filter (6) through hole that aperture is 0.1～5mm.
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| CN201310094373.5A CN104060101A (en) | 2013-03-23 | 2013-03-23 | Filtering purifying method and device for light alloy melt heavy infiltration solid inclusions |
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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN112349440A (en) * | 2020-11-01 | 2021-02-09 | 百色学院 | Liquid metal purification device and application method thereof |
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| CN201545895U (en) * | 2009-10-09 | 2010-08-11 | 李扬德 | Magnesium alloy recycled material remelting and refining device |
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| RU2089639C1 (en) * | 1994-12-14 | 1997-09-10 | Акционерное общество открытого типа "Волгоградский алюминий" | Method of refining of aluminum and its alloys |
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| Publication number | Priority date | Publication date | Assignee | Title |
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| CN112349440A (en) * | 2020-11-01 | 2021-02-09 | 百色学院 | Liquid metal purification device and application method thereof |
| CN112349440B (en) * | 2020-11-01 | 2022-10-18 | 百色学院 | Liquid metal purification device and application method thereof |
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Application publication date: 20140924 |