CN103103362A - Double-level inverse filter method and filter device for molten aluminum - Google Patents
Double-level inverse filter method and filter device for molten aluminum Download PDFInfo
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- CN103103362A CN103103362A CN2013100385705A CN201310038570A CN103103362A CN 103103362 A CN103103362 A CN 103103362A CN 2013100385705 A CN2013100385705 A CN 2013100385705A CN 201310038570 A CN201310038570 A CN 201310038570A CN 103103362 A CN103103362 A CN 103103362A
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Abstract
The invention discloses a double-level inverse filter method and a filter device for molten aluminum, which belong to the technical field of metallurgy. The filter device comprises a molten aluminum filter channel, and a first-level ceramic filter plate and a second-level ceramic filter plate which are horizontally arranged in the molten aluminum filter channel along the flow direction of the molten aluminum. The molten aluminum passes through the first-level ceramic filter plate from upside to downside, and passes through the second-level ceramic filter plate from downside to upside. According to the invention, the double-level filter of the molten aluminum is realized via the device under the special process conditions, and the molten aluminum ascends at the position of the second-level ceramic filter plate and then passes through the filter plate, so that the gravity influence can be effectively used, the best filter effect can be achieved, and the purity of the molten aluminum is high. The filter channel adopts an inner spiral pipe, so that the molten aluminum can rotationally pass through the second-level ceramic filter plate, small particles can be rotationally gathered to form large particles, the large particles can be settled on the bottom part of the filter channel, and then the filter effect is improved. The filter method and the filter device have the beneficial effects of simple structure, good filter effect and low implementation cost, and can replace the existing single-level filter devices and the on-line processing technology with high cost.
Description
Technical field
The present invention relates to the smelting non-ferrous metal casting technology field, particularly a kind of filter plant of aluminium water and filter method.
Background technology
Day by day fierce along with market competition, more and more higher to the specification of quality of aluminium product, improve the quality of aluminium product, at first to improve the quality of aluminium ingot casting.One of principal element that affects the aluminium ingot quality is that in molten aluminium, existing impurity can't effectively be removed, these impurity have worsened the cast structure of ingot casting, metallic continuity and compactness have been destroyed, cause the defectives such as ingot casting is loose, pore, slag inclusion, thereby reduced processing characteristics and the use properties of aluminium, had a strong impact on the quality of aluminium product.
For improving quality of ingot aluminum, purify molten aluminium most critical, most important but also the most difficult.Need to utilize filtration unit to carry out filter cleaner to it before the casting of aluminium water, at present, more typical simple filtration unit is box single-stage or two-stage filtering device, in this filtration unit, aluminium water is all levels or pass through screen plate from top to bottom in the same direction, poor filtration effect, filter pressure is less, can not reach good slagging-off effect.For improving filter effect, multiple aluminium water filtration technology has appearred, wherein, aluminium water online treatment technology is comparatively popular, as external MINT, SNIF, ALPUR etc., these technology can guarantee that the aluminium water that enters crystallizer is processed equably, can effectively improve purity and the quality homogeneity of aluminium ingot.Domestic PPF also has effect preferably.In addition, more representational in the aluminium water filtering device also have pipe filter and Ceramic Balls strainer, but all there is certain deficiency in they, not good to the granule foreign filter effect that granularity is less.
Therefore, need a kind of better aluminium water filtration process of research and the aluminium water filtering device with good slagging-off effect, a kind ofly can will play better effect and can improve the new road that the aluminium ingot quality can reduce production costs again the purified aluminium melt to explore.Be suitable for adopting short flow process (namely adopting electrolytic aluminium liquid directly but not the remelting of employing electrolysis aluminium ingot) to prepare the cleaning molten treatment process technology of aluminium ingot.
Summary of the invention
In view of this, the invention provides a kind of reverse double-stage filtering method of aluminium water and filtration unit, the first step of the method and device is forward filter from the top down, mainly that density is less, that size is thick impurity and slag inclusion filters out, and the second stage is to utilize from bottom to top the internal thread tube wall to form the reverse filtration of aluminium water turbulence, granule foreign rotation in aluminium water is assembled, form larger particles and utilize gravity automatic sedimentation, effectively solve prior art and can't satisfy simultaneously the technical problem that improves filter effect and reduce costs.
The present invention solves the problems of the technologies described above by following technique means:
At first the present invention provides a kind of aluminium water reverse double-stage filtering method, the method is: at first allow aluminium water from top to bottom by a ceramic filter plate, and then from the bottom to top by another ceramic filter plate, the temperature of described aluminium water is controlled at 690-780 ℃, and aluminium discharge is not more than 550kg/min.
Further, the flow pattern of described aluminium water is rotational flow.
In addition, the present invention also provides a kind of filtration unit of realizing the above-mentioned reverse double-stage filtering method of aluminium water, comprise aluminium water filtration passage, be horizontally placed on successively one-level ceramic filter plate and secondary ceramic filter plate in aluminium water filtration passage along the aluminium current direction removably, described aluminium water is from top to bottom by the one-level ceramic filter plate, and aluminium water is from the bottom to top by the secondary ceramic filter plate.
Further, the entry position of described aluminium water filtration passage is higher than its outlet position 15-50mm.
Further, described aluminium water filtration passage is inner helix pipe.
Further, the bottom of described aluminium water filtration passage is provided with the slag-drip opening of releasing.
Further, be positioned at the slag-drip opening place of releasing in described aluminium water filtration passage and be provided with carbon electrode bar.
Further, described filtration unit also comprises the pressure ring that is arranged at removably secondary ceramic filter plate top, and described pressure ring is made of two semi-rings.
Further, described aluminium water filtration passage forms the U-shaped structure by aluminium water downcomer and aluminium water ascent stage, and described one-level ceramic filter plate is arranged in aluminium water downcomer, and described secondary ceramic filter plate was arranged in the aluminium water ascent stage.
Further, also comprise the aluminium water flow grooves that is arranged at aluminium water filtration feeder connection end, the cross-sectional area of described aluminium water filtration passage is 2-4 times of aluminium water flow grooves cross-sectional area.
Beneficial effect of the present invention: the reverse double-stage filtering method of aluminium water of the present invention and filtration unit have the following advantages:
1) the present invention adopts bipolar filtration, the first step can filter out the larger impurity particle of granularity in aluminium water, the second stage can filter out the less impurity particle of granularity in aluminium water, good filtration effect, and under specific processing condition, make ceramic filter plate reach best filter effect, gained aluminium water purity is higher;
2) the present invention adopts bipolar reverse filtration,, can make than small-particle impurity under the impact of gravity by screen plate at secondary ceramic filter plate place's aluminium liter waterborne, further improves filter effect;
3) filtration channel adopts inner helix pipe the rotation of aluminium water is advanced and pass through from bottom to top the secondary ceramic filter plate, and making to assemble than the small-particle rotation becomes larger particles settling to the filtration channel bottom, improves filter effect;
4) aluminium water filtration passage adopts the structure that import is high, outlet is low, can make aluminium water form suitable pressure reduction in filtration channel and flow forward, and power need not additionally be provided, and effectively keeps filter pressure;
5) by the adsorbable most of refractory particle of carbon electrode bar, further improve the slagging-off effect.
Description of drawings
The invention will be further described below in conjunction with drawings and Examples.
Fig. 1 is perspective view of the present invention;
Fig. 2 is main pseudosection of the present invention;
Fig. 3 is the left view of Fig. 2;
Fig. 4 is the vertical view of Fig. 2.
Embodiment
the present invention is described in detail below with reference to accompanying drawing, as shown in the figure: the reverse two-stage filtering device of aluminium water of the present embodiment, comprise aluminium water filtration passage 1, be horizontally placed on successively aluminium water filtration passage 1 interior one-level ceramic filter plate 2 and secondary ceramic filter plate 3 along the aluminium current direction removably, two detachable being fixed in aluminium water filtration passage 1 of ceramic filter plate, so that change at any time, be provided for preventing the limited step 8 of one-level ceramic filter plate 2 whereabouts on the inwall of aluminium water filtration passage 1, secondary ceramic filter plate 3 tops are provided with the pressure ring 7 that blocks secondary ceramic filter plate 3, described pressure ring 7 is made of two semi-rings, make by refractory materials, be convenient to dismounting, to be convenient for changing ceramic filter plate, described aluminium water filters out the larger particle of granularity by one-level ceramic filter plate 2 from top to bottom, aluminium water filters out the less particle of granularity by secondary ceramic filter plate 3 from the bottom to top, can select according to actual needs the specification of each ceramic filter plate, the detachable connection between ceramic filter plate and aluminium water filtration passage, so that be convenient to change and cleaning.Owing to adopting double-stage filtering, and cascade filtration plate place aluminium water serves as reasons and flows down to upper, can take full advantage of action of gravity and make small-particle assemble sedimentation, and filter effect is better.
As further improvement in the technical proposal, the entry position of described aluminium water filtration passage 1 makes the aluminium water of inlet end and exit end form pressure reduction higher than its outlet position 15-50mm, and filter pressure is remained in preferred range, improves filter effect.
As further improvement in the technical proposal, described aluminium water filtration passage 1 is the internal screw pipeline, the rotation of aluminium water is advanced and pass through from bottom to top the secondary ceramic filter plate, making to assemble than the small-particle rotation becomes larger particles settling to the filtration channel bottom, improves filter effect.
As further improvement in the technical proposal, be provided with the slag-drip opening 4 of releasing on described aluminium water filtration passage 1, be convenient to deslagging and remove aluminium water in filtration channel when not using, the described slag-drip opening 4 of releasing is arranged at the bottom of aluminium water filtration passage 1, because the large granular impurity of assembling will be settled down to the filtration channel bottom, in this position, the slag-drip opening of releasing is set, more is convenient to deslagging and removes aluminium water.
As further improvement in the technical proposal, be positioned at slag-drip opening 4 places of releasing in described aluminium water filtration passage 1 and be provided with carbon electrode bar 5 for the absorption refractory particle, be positioned at the slag-drip opening place electrode bar is set, be convenient to cleaning.
As further improvement in the technical proposal, described aluminium water filtration passage 1 forms the U-shaped structure by aluminium water downcomer 1a and aluminium water ascent stage 1b, adopt the U-shaped transition, the aluminium water flow is stable, avoid occurring turbulent flow and affect its rotation, described one-level ceramic filter plate 2 is arranged in aluminium water downcomer 1a, and described secondary ceramic filter plate 3 is arranged in aluminium water ascent stage 1b.
As further improvement in the technical proposal, also comprise the aluminium water flow grooves 6 that is arranged at aluminium water filtration passage 1 inlet end, the cross-sectional area of described aluminium water filtration passage 1 is 2-4 times of aluminium water flow grooves 6 cross-sectional areas, can select according to filtration velocity.
Adopt said apparatus to implement the reverse double-stage filtering method of aluminium water, aluminium water filtered:
Embodiment 1:
At first allow aluminium water from top to bottom by a ceramic filter plate, and then from the bottom to top by another ceramic filter plate, aluminium water rotation is advanced under the effect of internal screw filtration channel, and the temperature of described aluminium water is controlled at 690 ℃, and aluminium discharge is controlled at 450kg/min.
Embodiment 2:
At first allow aluminium water from top to bottom by a ceramic filter plate, and then from the bottom to top by another ceramic filter plate, the rotation of aluminium water is advanced under the effect of internal screw filtration channel, the temperature of aluminium water is controlled at 720 ℃, aluminium discharge is controlled at 500kg/min.
Embodiment 3:
At first allow aluminium water from top to bottom by a ceramic filter plate, and then from the bottom to top by another ceramic filter plate, the rotation of aluminium water is advanced under the effect of internal screw filtration channel, and the aluminium water temp is controlled at 750 ℃, aluminium discharge is controlled at 550kg/min.
Respectively by embodiment 1,2,3 each aluminium water carried out 10 times filter, to the validity check that removes the gred of the aluminium water after filtering, the method of inspection is: sample mold is of a size of 75mm * 135mm * 30mm, the casting sample gets aluminium ingot casting sample, sample is used to send into after diamond polishing carry out anodic oxidation treatment in sulfuric acid tank, appear slag inclusion, make it be easy to identification, statistics is mingled with quantity.The defectives such as loosening all appears in the gained sample, pore, slag inclusion.
Explanation is at last, above embodiment is only unrestricted in order to technical scheme of the present invention to be described, although with reference to preferred embodiment, the present invention is had been described in detail, those of ordinary skill in the art is to be understood that, can modify or be equal to replacement technical scheme of the present invention, and not breaking away from aim and the scope of technical solution of the present invention, it all should be encompassed in the middle of claim scope of the present invention.
Claims (10)
1. reverse double-stage filtering method of aluminium water, it is characterized in that: at first allow aluminium water from top to bottom by a ceramic filter plate, and then from the bottom to top by another ceramic filter plate, the temperature of described aluminium water is controlled at 690-780 ℃, and aluminium discharge is not more than 550kg/min.
2. the reverse double-stage filtering method of aluminium water according to claim 1, it is characterized in that: the flow pattern of described aluminium water is rotational flow.
3. filtration unit of realizing the reverse double-stage filtering method of the described aluminium water of claim 1 or 2, it is characterized in that: comprise aluminium water filtration passage (1), be horizontally placed on successively aluminium water filtration passage (1) interior one-level ceramic filter plate (2) and secondary ceramic filter plate (3) along the aluminium current direction removably, described aluminium water is from top to bottom by one-level ceramic filter plate (2), and aluminium water is from the bottom to top by secondary ceramic filter plate (3).
4. filtration unit according to claim 3, it is characterized in that: the entry position of described aluminium water filtration passage (1) is higher than its outlet position 15-50mm.
5. filtration unit according to claim 4, it is characterized in that: described aluminium water filtration passage (1) is the internal screw pipeline.
6. filtration unit according to claim 5, it is characterized in that: the bottom of described aluminium water filtration passage (1) is provided with the slag-drip opening of releasing (4).
7. filtration unit according to claim 6, is characterized in that: be positioned at the slag-drip opening of releasing (4) in described aluminium water filtration passage (1) and locate to be provided with carbon electrode bar (5).
8. filtration unit according to claim 7 is characterized in that: also comprise the pressure ring (7) that is arranged at removably secondary ceramic filter plate (3) top, described pressure ring (7) is made of two semi-rings.
9. according to claim 3-8 described filtration units of any one, it is characterized in that: described aluminium water filtration passage (1) forms the U-shaped structure by aluminium water downcomer (1a) and aluminium water ascent stage (1b), described one-level ceramic filter plate (2) is arranged in aluminium water downcomer (1a), and described secondary ceramic filter plate (3) was arranged in the aluminium water ascent stage (1b).
10. filtration unit according to claim 9, it is characterized in that: also comprise the aluminium water flow grooves (6) that is arranged at aluminium water filtration passage (1) inlet end, the cross-sectional area of described aluminium water filtration passage (1) is 2-4 times of aluminium water flow grooves (6) cross-sectional area.
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| Application Number | Priority Date | Filing Date | Title |
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| CN201310038570.5A CN103103362B (en) | 2013-01-31 | 2013-01-31 | The reverse double-stage filtering method of aluminium water and filtration unit |
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| CN201310038570.5A CN103103362B (en) | 2013-01-31 | 2013-01-31 | The reverse double-stage filtering method of aluminium water and filtration unit |
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| CN103103362A true CN103103362A (en) | 2013-05-15 |
| CN103103362B CN103103362B (en) | 2015-09-09 |
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Cited By (9)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN105617749A (en) * | 2016-02-03 | 2016-06-01 | 安徽乙地生态科技有限公司 | Filter device for sewage treating pipeline |
| CN105618684A (en) * | 2014-10-28 | 2016-06-01 | 沈阳黎明航空发动机(集团)有限责任公司 | Method for improving high-temperature alloy casting filtering effect |
| CN107190152A (en) * | 2017-05-23 | 2017-09-22 | 重庆大学 | A kind of layering of metal bath stands purifier |
| CN107916336A (en) * | 2017-12-14 | 2018-04-17 | 宁夏太阳镁业有限公司 | A kind of magnesium alloy refining copple |
| CN108499186A (en) * | 2018-05-28 | 2018-09-07 | 栋梁铝业有限公司 | A kind of aluminum water filtration system |
| CN108788068A (en) * | 2018-07-05 | 2018-11-13 | 苏州广型模具有限公司 | High-pressure casting aluminum water screen pipe |
| CN109915356A (en) * | 2019-04-23 | 2019-06-21 | 张军 | A kind of oil-field flooding high-pressure plunger pump skid-mounted device |
| CN110385407A (en) * | 2019-08-29 | 2019-10-29 | 重庆丰禾铝业有限公司 | A kind of molten aluminum crosses the filter plate replacing options of strainer |
| CN113099687A (en) * | 2021-03-22 | 2021-07-09 | 西安交通大学 | Microchannel cold drawing structure with reverse mediation function |
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| CN203075728U (en) * | 2013-01-31 | 2013-07-24 | 西南大学 | Inverse dual-stage aluminum liquid filtering device |
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| US3743500A (en) * | 1968-01-10 | 1973-07-03 | Air Liquide | Non-polluting method and apparatus for purifying aluminum and aluminum-containing alloys |
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| CN88105031A (en) * | 1988-02-13 | 1988-10-12 | 刘溥坚 | Snail type oil-filtering unit |
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Cited By (10)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN105618684A (en) * | 2014-10-28 | 2016-06-01 | 沈阳黎明航空发动机(集团)有限责任公司 | Method for improving high-temperature alloy casting filtering effect |
| CN105618684B (en) * | 2014-10-28 | 2018-05-08 | 沈阳黎明航空发动机(集团)有限责任公司 | A kind of method for improving high temperature alloy cast filter effect |
| CN105617749A (en) * | 2016-02-03 | 2016-06-01 | 安徽乙地生态科技有限公司 | Filter device for sewage treating pipeline |
| CN107190152A (en) * | 2017-05-23 | 2017-09-22 | 重庆大学 | A kind of layering of metal bath stands purifier |
| CN107916336A (en) * | 2017-12-14 | 2018-04-17 | 宁夏太阳镁业有限公司 | A kind of magnesium alloy refining copple |
| CN108499186A (en) * | 2018-05-28 | 2018-09-07 | 栋梁铝业有限公司 | A kind of aluminum water filtration system |
| CN108788068A (en) * | 2018-07-05 | 2018-11-13 | 苏州广型模具有限公司 | High-pressure casting aluminum water screen pipe |
| CN109915356A (en) * | 2019-04-23 | 2019-06-21 | 张军 | A kind of oil-field flooding high-pressure plunger pump skid-mounted device |
| CN110385407A (en) * | 2019-08-29 | 2019-10-29 | 重庆丰禾铝业有限公司 | A kind of molten aluminum crosses the filter plate replacing options of strainer |
| CN113099687A (en) * | 2021-03-22 | 2021-07-09 | 西安交通大学 | Microchannel cold drawing structure with reverse mediation function |
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