CN104928506B - A kind of degasification of aluminium liquid melting, slagging-off composite purifying process - Google Patents
A kind of degasification of aluminium liquid melting, slagging-off composite purifying process Download PDFInfo
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- CN104928506B CN104928506B CN201510254224.XA CN201510254224A CN104928506B CN 104928506 B CN104928506 B CN 104928506B CN 201510254224 A CN201510254224 A CN 201510254224A CN 104928506 B CN104928506 B CN 104928506B
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Abstract
The present invention relates in a kind of degasification of aluminium liquid melting, slagging-off composite purifying process, degasification slagging-off including aluminium liquid in stove and the outer casting process of stove aluminium liquid degasification slagging-off；The degasification slagging-off of aluminium liquid in stove：(1) high-efficiency activated innocuous refining flux is added in the aluminium liquid in stove；(2), with nitrogen as carrier in stove, refining agent is blown in melt；The degasification slagging-off of external refining stove aluminium liquid：(1) the aluminium liquid outside plug for outlet filters chute inner bottom part and is passed through nitrogen, and nitrogen is imported in filtration chute through the vertically-mounted air brick of its bottom is filtered；(2) aluminium liquid is poured Hu Chu in aluminium liquid and arranges vertical-type cascade filtration plate through filtering chute to Hu Chu is poured.Using adding high-efficiency activated refining agent and being passed through nitrogen in stove, with nitrogen as carrier, refining agent blows to aluminium liquid bottom to this technique, and refining agent is fused into droplet absorption slag inclusion, and during this, hydrogen is constantly diffused in bubble, reaches the purpose for purifying aluminium liquid.
Description
Technical field
The invention belongs to non-ferrous metal founding field, is related to aluminium liquid degasification slagging-off technology, especially in a kind of aluminium liquid smelting furnace,
The outer degasification of smelting furnace, the composite purifying process of slagging-off.
Background technology
Aluminium alloy is easy to air-breathing in melting, production and produces slag inclusion, and air-breathing can cause product to have pore, loose, thus
Reduce the consistency of product；Slag inclusion uprises its hardness, can produce impact to the product quality of following process, or make processing apparatus
Damage.It is known that without the very high molten aluminium alloy of degree of purity, even if rotten, crystal grain refinement in fusion process and other effects
Good again, production technology and Technology for Heating Processing etc. are complete again, and defect can be difficult to eliminate, therefore produce once from starting there is
High-quality product is also difficult to realize.
Additionally, the gas in aluminium alloy solution and slag inclusion have very strong reciprocation, therefore, slagging-off and dehydrogenation should be
While carrying out, cleaning molten should cover whole production process, but there is presently no while taking into account slagging-off degasification and covering whole
The purification techniques of production process.
By retrieval, it is found that having patent document at present proposes different cleaning molten methods.As Chinese granted patent
Document (title：Purification techniques in a kind of aluminium liquid smelting furnace, notification number：CN103255304), the patent is simply suitable in smelting furnace
Cleaning molten, and when melt is outside smelting furnace, does not purify, so that solution is contaminated again, air-breathing, generation folder
Slag, the problem which is present exactly the present patent application need the technical barrier for solving.
Additionally, applicant further found that following three patent documents related with the present patent application：
1st, purification techniques (CN103255304A) in a kind of aluminium liquid smelting furnace.The technology includes to refine twice and three skills of skimming
Art, wherein, added refining agent before refining, in refining process, using injection refining in stove, using duster by refining agent
Spraying in the aluminium liquid in smelting furnace, and be passed through argon gas carries out degasification.The purification techniques improves the cleanliness factor of electrolytic aluminium liquid so that place
In aluminium liquid after reason, hydrogen content is less than 0.125ml/100gAl, and slagging-off rate reaches more than 85%, reduces aluminium alloy cast ingot generation
Loose, slag inclusion problem, substantially increase product percent of pass.
2nd, a kind of aluminum anodizing degasification deslagging device (CN103540767A), including holding furnace and support, holding furnace has
Lid, lid are connected with lifter plate by connecting rod, and lifter plate is connected with support by hydraulically extensible bar, the lower end connection of lid
The upper end for having shaft, lid is provided with motor, and the upper end of shaft is passed perpendicularly through lid and is connected with motor, stirs
The lower end for mixing axle is placed in holding furnace, and the lower end of shaft is also associated with graphite rotator, and the surface of graphite rotator has pore, stirs
Axle is mixed for quill shaft, breather line in shaft, is provided with, breather line one end is stretched out shaft and is connected with nitrogen gas generator, lead to
The other end of feed channel is connected with the pore of graphite rotator.
3rd, the online ventilating/degassing/filtering all-in-one machine of a kind of aluminium liquid (CN202090037U), including organism, described body
Inside include：One " u "-shaped groove, the two ends of " U " type are each outwardly extending to body wall；One dividing plate, its are installed on body top,
Positioned at groove upper end；One air brick group, which is installed in the bottom groove of " u "-shaped groove；One filter, its are installed in dividing plate and " U "
On the groove that shape groove is formed.
Contrasted by technical characteristic, although above-mentioned three patent documents are with the present patent application on some technical characteristics
There is close part, but its concrete structure and technique are still differed with the present patent application.
Content of the invention
The present invention seeks in view of the shortcomings of the prior art, a kind of degasification of aluminium liquid melting, slagging-off are provided and are combined only
Metallization processes, the technique cover whole production process, while having both degasification, the purification techniques of two kinds of effects of slagging-off.
The present invention seeks to be achieved through the following technical solutions：
A kind of degasification of aluminium liquid melting, slagging-off composite purifying process, pour into a mould outside degasification slagging-off including aluminium liquid in stove and stove
During aluminium liquid degasification slagging-off, step is：
The degasification slagging-off of aluminium liquid in stove：
(1) refining agent is added in the aluminium liquid in stove, and refining agent addition is the 0.2～0.3% of melt quality；
(2) nitrogen is imported concise rake in stove, nitrogen enters melt bottom through graphite, with nitrogen as carrier, will refining
Agent is blown in melt, and gas flow is 2～6m3/ h, refining time are 30～45min, and melt temperature is 730 DEG C～750 DEG C；
The degasification slagging-off of aluminium liquid in the outer casting process of stove：
(1) the aluminium liquid in the outer aluminium liquid cleaning system of stove filters chute inner bottom part and is passed through nitrogen, and nitrogen is through filtration its bottom
Vertically-mounted air brick import and filter in chute, the gas flow of be passed through nitrogen is 2～4m3/ h, bubble highly for 2～
4cm；
(2) aluminium liquid pours the anterior setting vertical-type cascade filtration plate of kettle through filtering chute to Hu Chu is poured in aluminium liquid.
And, the composition of the refining agent and weight proportion are：Na2SiF6：10-15%, Na3AlF6：10-15%,
NaNO3：30-35%, NaCl：10-20%, NaCO3：25-30%.
And, the cleaning system of the outer aluminium liquid of the stove includes that aluminium liquid filters chute and deslagging device, and wherein aluminium liquid filters stream
Groove is snakelike, and its bottom axis position is uniformly arranged at intervals with air brick, and the connection of going to the bottom in air brick is provided with nitrogen importing
Pipe；Deslagging device is arranged on the baffle plate rear portion for filtering chute, and is separated into cascade filtration slot form by dividing plate, in every one-level mistake
On filter pocket, level is stamped single filter plate and cascade filtration plate respectively.
And, the specification of the one-level and cascade filtration plate is 30～40ppi.
Advantages of the present invention and good effect are：
1st, this technique includes degasification in the outer product casting process of degasification in stove in fusion process, slagging-off and stove, slagging-off,
Wherein adopt in stove with nitrogen as carrier, efficient, innocuous refining flux is blown to aluminium liquid bottom, refining agent is fused into droplet suction
Attached slag inclusion, during this, hydrogen is constantly diffused in bubble, reaches the purpose for purifying aluminium liquid.
2nd, refining agent of this technique used in fusion process in stove is efficient, nontoxic, and proportioning is scientific and efficient, and reaction is produced
N2And CO2Play refining effect, NaCl has an extremely strong wetability, so adsorb, dissolving slag inclusion very capable；Meanwhile,
Na3AlF6、Na2SiF6Flux and aluminium liquid interfacial surface tension is increased, effectively can extend the reaction time, dryness slag is made, improve refining
Effect and point slag ability.
3rd, this technique is passed through nitrogen using the snakelike filtration chute for being provided with air brick outside stove, removes hydrogen, filters stream
Vertical-type cascade filtration plate is installed on the outside of groove baffle plate, filter cleaner, purification melt, wherein snakelike chute have choked flow effect, enter
And extend the clarification time, improve chute absorption slag inclusion ability, connected vertical-type cascade filtration plate, again filter aluminium
Liquid slag inclusion, cascade filtration improve the filter effect to small size field trash.
Description of the drawings
Fig. 1 is the structural front view of degasification deslagging device outside the stove of the present invention；
Fig. 2 is the longitudinal cross-section cross-sectional schematic of Fig. 1.
Specific embodiment
Technological means, creation characteristic, reached purpose and effect for realizing the present invention is easy to understand, with reference to
Specific embodiment, is expanded on further the present invention.It should be noted that the present embodiment is descriptive, be not determinate, no
Protection scope of the present invention can thus be limited.
Embodiment 1：
A kind of degasification of aluminium liquid melting, slagging-off composite purifying process, step is：
First, in stove, the degasification of aluminium liquid removes the gred：
(1) high-efficiency activated, innocuous refining flux is added in stove；
(2) with nitrogen as carrier, refining agent is blown in melt, refining agent addition is the 0.2% of melt quality, refining
Agent proportioning is Na2SiF6：10%th, Na3AlF6：10%th, NaNO3：32%th, NaCl：20%th, NaCO3：28%；By nitrogen in the stove
Concise rake is imported, nitrogen enters melt bottom through graphite, and the gas flow of be passed through nitrogen is 4m3/ h, refining time is
40min, melt refining temperature are 730 DEG C；
2nd, in the outer casting process of stove, the degasification of aluminium liquid removes the gred：
The cleaning system of the outer aluminium liquid of stove filters chute 6 and deslagging device 3 comprising aluminium liquid, referring to Fig. 1,2, wherein aluminium liquid is filtered
Chute is snakelike, and its bottom axis position is uniformly arranged at intervals with air brick 7, ventilative for three shown in the present embodiment accompanying drawing
Brick, the quantity of the air brick and are pivotably are set according to actual needs；Nitrogen is installed in the connection of going to the bottom of air brick
Ingress pipe 8；Deslagging device is arranged on 5 rear portion of baffle plate for filtering chute, and is separated into cascade filtration slot form by dividing plate 2,
On per one-level lautertuns, level is stamped single filter plate 4 and cascade filtration plate 1 respectively.
The step of outer aluminium liquid degasification of stove removes the gred be：
(1) the snakelike aluminium liquid outside plug for outlet filters chute inner bottom part and is passed through nitrogen, and nitrogen is erected through its bottom is filtered
The straight air brick that installs is imported and is filtered in chute, with sufficiently cleaned up melt, and the gas flow of the nitrogen being passed through is 3m3/ h, gas
Bubble height is 2cm；
(2) aluminium liquid pours the anterior setting vertical-type cascade filtration plate of kettle, wherein one-level through filtering chute to Hu Chu is poured in aluminium liquid
Filter specification is 40ppi, and cascade filtration plate gauge lattice are 20ppi.
Embodiment 2：
A kind of degasification of aluminium liquid melting, slagging-off composite purifying process, step is：
First, in stove, the degasification of aluminium liquid removes the gred：
(1) high-efficiency activated, innocuous refining flux is added in stove；
(2) with nitrogen as carrier, refining agent is blown in melt, refining agent addition is the 0.3% of melt quality,
Na2SiF6：12%th, Na3AlF6：13%th, NaNO3：30%th, NaCl：15%th, NaCO3：30%；Nitrogen is imported in stove concise
Rake, nitrogen enter melt bottom through graphite, and the gas flow of be passed through nitrogen is 6m3/ h, refining time are 30min, melt
Refining temperature is 750 DEG C；
2nd, the degasification slagging-off (which filters chute and the structure of deslagging device is same as embodiment 1) of the outer aluminium liquid of stove：
(1) the snakelike aluminium liquid outside plug for outlet filters chute inner bottom part and is passed through nitrogen, and nitrogen is erected through its bottom is filtered
The straight air brick that installs is imported and is filtered in chute, with sufficiently cleaned up melt, and the gas flow of the nitrogen being passed through is 4m3/ h, gas
Bubble height is 3cm；
(2) aluminium liquid pours the anterior setting vertical-type cascade filtration plate of kettle, wherein, one-level through filtering chute to Hu Chu is poured in aluminium liquid
Filter specification is 40ppi, and cascade filtration plate gauge lattice are 30ppi.
By inspection, this technique is applied to the melting of aluminium alloy, the whole process of alloy product cast, effectively can exclude
Gas and slag inclusion, improve degree of purity, and product pinhole rate reaches one-level, and inclusion content is reduced to 0.1%, greatly ensure that product
Quality level.
Claims (3)
1. a kind of degasification of aluminium liquid melting, slagging-off composite purifying process, poured into a mould outside degasification slagging-off including aluminium liquid in stove and stove
The degasification slagging-off of aluminium liquid in journey, it is characterised in that：Step is：
The degasification slagging-off of aluminium liquid in stove：
(1) refining agent is added in the aluminium liquid in stove, and refining agent addition is the 0.2～0.3% of melt quality；
(2) nitrogen is imported refining rake in stove, nitrogen enters melt bottom through graphite, with nitrogen as carrier, refining agent blown
To in melt, gas flow is 2～6m3/ h, refining time are 30～45min, and melt temperature is 730 DEG C～750 DEG C；
The degasification slagging-off of aluminium liquid in the outer casting process of stove：
(1) the aluminium liquid in the outer aluminium liquid cleaning system of stove filters chute inner bottom part and is passed through nitrogen, and nitrogen is erected through its bottom is filtered
The straight air brick that installs is imported and is filtered in chute, and the gas flow of be passed through nitrogen is 2～4m3/ h, bubble are highly 2～4cm；
(2) aluminium liquid pours the anterior setting vertical-type cascade filtration plate of kettle through filtering chute to Hu Chu is poured in aluminium liquid；
The composition of the refining agent and weight proportion are：Na2SiF6：10-15%, Na3AlF6：10-15%, NaNO3：30-35%,
NaCl：10-20%, NaCO3：25-30%.
2. the degasification of aluminium liquid melting according to claim 1, slagging-off composite purifying process, it is characterised in that：Outside the stove
Aluminium liquid cleaning system includes that aluminium liquid filters chute and deslagging device, and it is snakelike, its bottom axis position that wherein aluminium liquid filters chute
Air brick is uniformly arranged at intervals with, nitrogen ingress pipe is installed in the connection of going to the bottom of air brick；Deslagging device is arranged on filtration stream
The baffle plate rear portion of groove, and cascade filtration slot form is separated into by dividing plate, level is stamped single filter plate and cascade filtration respectively
Plate.
3. the degasification of aluminium liquid melting according to claim 2, slagging-off composite purifying process, it is characterised in that：The one-level
The specification of filter and the cascade filtration plate is 30～40ppi.
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| Application Number | Priority Date | Filing Date | Title |
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| CN201510254224.XA CN104928506B (en) | 2015-05-19 | 2015-05-19 | A kind of degasification of aluminium liquid melting, slagging-off composite purifying process |
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| CN201510254224.XA CN104928506B (en) | 2015-05-19 | 2015-05-19 | A kind of degasification of aluminium liquid melting, slagging-off composite purifying process |
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| Publication number | Priority date | Publication date | Assignee | Title |
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| CN107442761A (en) * | 2016-06-01 | 2017-12-08 | 郭俊峰 | Metal casting system and method |
| CN106676306A (en) * | 2017-01-15 | 2017-05-17 | 丹阳荣嘉精密机械有限公司 | Method for improving purifying effect of rare earth on aluminum alloy melt |
| CN107377914A (en) * | 2017-08-04 | 2017-11-24 | 江西金世纪特种焊接材料有限公司 | A kind of Welded material melting continuous casting installation for casting |
| CN109182781A (en) * | 2018-10-29 | 2019-01-11 | 苏州康索机电有限公司 | A kind of method of smelting for molten aluminum |
| CN111500886A (en) * | 2020-06-12 | 2020-08-07 | 包头常铝北方铝业有限责任公司 | Aluminum alloy refining and slagging-off method |
| CN112553474B (en) * | 2020-11-04 | 2023-01-31 | 芜湖楚江合金铜材有限公司 | Smelt nitrogen gas mixing stirring device for compartment |
| CN116356154B (en) * | 2023-03-29 | 2023-11-03 | 江苏立中新材料科技有限公司 | Aluminum alloy blast furnace smelting purification device and purification method |
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| Publication number | Priority date | Publication date | Assignee | Title |
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| US3839019A (en) * | 1972-09-18 | 1974-10-01 | Aluminum Co Of America | Purification of aluminum with turbine blade agitation |
| CN1012180B (en) * | 1986-08-16 | 1991-03-27 | 南京晨光机器厂 | Agent for aluminium-siliconalloge modification refinement |
| CN202090037U (en) * | 2011-04-14 | 2011-12-28 | 柯东杰 | Online ventilating/degassing/filtering all-in-one machine for aluminum liquid |
| CN103173629A (en) * | 2011-12-23 | 2013-06-26 | 秦皇岛开发区美铝合金有限公司 | Aluminum alloy cleanliness treatment process special for hub forging |
| CN203393207U (en) * | 2013-08-14 | 2014-01-15 | 秦皇岛开发区美铝合金有限公司 | Aluminum alloy melt liquid degassing device |
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Effective date of registration: 20200603 Address after: No. 338, West Development Road, Qingyuan District, Baoding, Hebei Patentee after: Hebei xinlizhong Nonferrous Metals Group Co., Ltd Address before: 071199, No. 338, West Street, Qingyuan County, Hebei, Baoding Patentee before: HEBEI LIZHONG NONFERROUS METAL GROUP Co.,Ltd. |