CN110172591B - Method for realizing ultrahigh-purity aluminum purification crystallization by using multiple transformants - Google Patents
Method for realizing ultrahigh-purity aluminum purification crystallization by using multiple transformants Download PDFInfo
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- C22B—PRODUCTION AND REFINING OF METALS; PRETREATMENT OF RAW MATERIALS
- C22B21/00—Obtaining aluminium
- C22B21/06—Obtaining aluminium refining
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- C30—CRYSTAL GROWTH
- C30B—SINGLE-CRYSTAL GROWTH; UNIDIRECTIONAL SOLIDIFICATION OF EUTECTIC MATERIAL OR UNIDIRECTIONAL DEMIXING OF EUTECTOID MATERIAL; REFINING BY ZONE-MELTING OF MATERIAL; PRODUCTION OF A HOMOGENEOUS POLYCRYSTALLINE MATERIAL WITH DEFINED STRUCTURE; SINGLE CRYSTALS OR HOMOGENEOUS POLYCRYSTALLINE MATERIAL WITH DEFINED STRUCTURE; AFTER-TREATMENT OF SINGLE CRYSTALS OR A HOMOGENEOUS POLYCRYSTALLINE MATERIAL WITH DEFINED STRUCTURE; APPARATUS THEREFOR
- C30B11/00—Single-crystal growth by normal freezing or freezing under temperature gradient, e.g. Bridgman-Stockbarger method
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- C30B—SINGLE-CRYSTAL GROWTH; UNIDIRECTIONAL SOLIDIFICATION OF EUTECTIC MATERIAL OR UNIDIRECTIONAL DEMIXING OF EUTECTOID MATERIAL; REFINING BY ZONE-MELTING OF MATERIAL; PRODUCTION OF A HOMOGENEOUS POLYCRYSTALLINE MATERIAL WITH DEFINED STRUCTURE; SINGLE CRYSTALS OR HOMOGENEOUS POLYCRYSTALLINE MATERIAL WITH DEFINED STRUCTURE; AFTER-TREATMENT OF SINGLE CRYSTALS OR A HOMOGENEOUS POLYCRYSTALLINE MATERIAL WITH DEFINED STRUCTURE; APPARATUS THEREFOR
- C30B28/00—Production of homogeneous polycrystalline material with defined structure
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- C30B28/06—Production of homogeneous polycrystalline material with defined structure from liquids by normal freezing or freezing under temperature gradient
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- C30—CRYSTAL GROWTH
- C30B—SINGLE-CRYSTAL GROWTH; UNIDIRECTIONAL SOLIDIFICATION OF EUTECTIC MATERIAL OR UNIDIRECTIONAL DEMIXING OF EUTECTOID MATERIAL; REFINING BY ZONE-MELTING OF MATERIAL; PRODUCTION OF A HOMOGENEOUS POLYCRYSTALLINE MATERIAL WITH DEFINED STRUCTURE; SINGLE CRYSTALS OR HOMOGENEOUS POLYCRYSTALLINE MATERIAL WITH DEFINED STRUCTURE; AFTER-TREATMENT OF SINGLE CRYSTALS OR A HOMOGENEOUS POLYCRYSTALLINE MATERIAL WITH DEFINED STRUCTURE; APPARATUS THEREFOR
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Abstract
The invention relates to a method for realizing ultrahigh-purity aluminum purification crystallization by utilizing multiple rotors, which ensures that the liquid level of aluminum liquid is not driven by utilizing the low rotating speed of a first rotor and a third rotor, ensures that the aluminum liquid moves more actively under the liquid level by mutually matching a second rotor and the third rotor which rotate in opposite directions so as to ensure the quality and quantity of crystallization products, and also considers the stability of the liquid level and the more active movement of the aluminum liquid under the liquid level.
Description
Technical Field
The invention relates to a method for purifying metal aluminum, in particular to a method for realizing ultrahigh-purity aluminum purification crystallization by using multiple rotors.
Background
Aluminum products with a purity above 5N5 are referred to as ultra-high purity aluminum. The ultra-high purity aluminum has wide application in the fields of electronics, aviation, navigation, chemical industry, national defense industry and the like, and the dosage is increased year by year. However, at present, few enterprises can produce 5N5 ultra-high purity aluminum meeting the requirements of users domestically, and research and development units have a reasonable number, so that the ultra-high purity aluminum required domestically almost depends on import.
Although some domestic enterprises are in trial production, the gap between the production method and the similar domestic enterprises is large, and the domestic requirements cannot be met, so that the research and development of a new production mode to replace import is a target of continuous efforts in the industry.
Firstly, the method is improved, and the prior art in China has the disadvantages of excessive related fields, huge consumption and difficult control; secondly, the efficiency is low, the process flow needs to be repeated for many times, the time and the labor are wasted, and the productivity is low; thirdly, the energy consumption is higher and is contrary to the national policy of energy conservation and emission reduction; fourthly, the quality is unstable, and the long-term stable supply for domestic users cannot be realized.
In the search, Chinese patent No. 201610042682.1 proposes a method for purifying ultra-high purity aluminum, which is characterized by comprising selecting refined aluminum with the purity of at least 4N 6; the inner wall of the crucible is coated with an anti-oxidation layer; the seed crystal adopts 5N aluminum as a material; keeping the temperature of the aluminum liquid at 680-700 ℃; the seed crystal extends into the liquid level for 2-3 cm, and the final crystal is in an inverted mushroom shape; the seed crystal rotating speed is 60-100 rpm, and the aluminum liquid is driven to rotate spirally; the cooling air rate is 1-3L/min, and the temperature is 0-20 ℃; the example produces 200-300 kg of ultra-high purity aluminum. The method has a plurality of defects, such as: the purity of the raw material is at least 4N6, and the application range is limited; the aluminum liquid needs to be kept at a higher temperature, and energy consumption and low efficiency are realized; the seed crystal is made of 5N as a raw material, so that the seed crystal is high in manufacturing cost, not suitable for processing and poor in cooling effect; the seed crystal drives the aluminum liquid to rotate in a spiral manner, so that the aluminum liquid is easy to mix, and the purification is influenced; inverted mushroom crystallization involves seed yield ambiguity; the air used for cooling is very warm air.
Therefore, it is necessary to find a purification method of ultra-high purity aluminum, which has simple process, low cost and good purification effect and is suitable for industrial production.
In the production process of the ultra-high purity aluminum, the crystallization device needs to ensure a certain rotating speed in the rotating process, and simultaneously, the liquid level of the aluminum liquid needs to be kept to be not driven, so that the contact between the aluminum liquid and air is reduced, and the generation of oxides is reduced. However, most crystallization devices cannot improve the rotating speed and simultaneously keep the molten aluminum liquid level from being driven, so that the product purity is not high and the purification efficiency is low.
The applicant applied for a two-rotor purification and crystallization device before, which has a better crystallization effect than a common single-rotor purification and crystallization device, but still cannot give consideration to the situation that the liquid level is driven as far as possible, and simultaneously ensures that high-purity aluminum under the liquid level moves violently, thereby realizing the best crystallization effect.
Disclosure of Invention
The invention designs a method for realizing ultra-high purity aluminum purification crystallization by using multiple rotators, which solves the technical problems that the existing crystallization device can not keep the liquid level of aluminum liquid not to be driven while keeping high-speed rotation, so that the aluminum liquid is contacted with air, oxides are easy to generate, and the aluminum liquid below the liquid level can not generate enough active motion to ensure the crystallization quality and quantity during low-speed rotation.
In order to solve the technical problems, the invention adopts the following scheme:
a method for realizing ultrahigh-purity aluminum purification crystallization by using multiple transformants comprises the following steps:
firstly, melting aluminum raw materials with the purity of 3N-5N into aluminum liquid in a crucible (1), wherein the melting temperature is 660-700 ℃, and the lower end of the crucible (1) is of an arc-shaped structure;
secondly, mounting a crystallization device above the crucible (1), wherein the lower end of the crystallization device extends below the liquid level of the aluminum liquid, and continuously introducing 50-100L/min of normal-temperature air into the crystallization device through an air inlet pipe arranged at the upper end of the crystallization device;
step three, a first motor is started to enable the first rotor (11) and the third rotor (13) to rotate in the same direction, and a second motor is started to enable a second rotor (12) between the first rotor (11) and the third rotor (13) to rotate in the opposite direction; more high-purity aluminum liquid is gathered around the first rotor (11), the second rotor (12) and the third rotor (13) in the rotating process and solidified under the action of cooling gas, and finally solidified and deposited at the lower end of the crystallization device to form high-purity aluminum crystals; the first rotator (11) and the third rotator (13) have low rotating speeds to ensure that the liquid level of the aluminum liquid is not driven, and the second rotator (12) and the third rotator (13) which rotate in opposite directions are matched with each other to ensure that the aluminum liquid moves more actively under the liquid level to ensure the quality and quantity of crystallization products;
step four, when the crystals reach a half of the set value, taking out the crystallization device, stopping rotating, rapidly cooling the lower end of the crystallization device and the crystals in the air, cooling to 280-20 ℃, then inserting the crystals below the liquid level of the aluminum liquid again, repeating the step two and the step three until the crystals cannot be increased continuously, stopping rotating, hanging away the crystallization device, and taking down the crystals;
fifthly, cutting off 50-70 mm of the head and the tail of the crystal to obtain a primary purified substance;
and step six, pouring out the residual aluminum liquid in the crucible (1), and putting the primary purified substance into the crucible (1) again to repeat the steps one to five to obtain the ultra-high purity aluminum raw material.
Further, in the third step, the first rotor (11), the second rotor (12), and the third rotor (13) may also rotate in the same direction, and the rotation in the same direction of the second rotor (12) and the rotation in the opposite direction of the second rotor (12) are alternately performed.
Further, in the third step, when the second rotor (12) rotates in the opposite direction of the first rotor (11) and the third rotor (13) for more than ten minutes, the rotor directions of the first motor and the second motor are controlled so that the first rotor (11), the second rotor (12) and the third rotor (13) rotate in the same direction, which is beneficial to accelerating the ready-made crystallization product.
Further, the inner wall of the crucible (1) and the outer wall of the crystallization device are both provided with an anti-oxidation coating.
A multi-rotor purification and crystallization device for ultrahigh pure aluminum is arranged above a crucible (1) and the lower end of the multi-rotor purification and crystallization device extends below the liquid level of aluminum liquid, and is characterized in that: the lower end of the purification crystallization device is provided with a first rotator (11), a second rotator (12) and a third rotator (13), the first rotator (11) is positioned right above the second rotator (12), the second rotator (12) is positioned right above the third rotator (13) and all the first rotator (11) and the third rotator (13) are positioned below the liquid level of molten aluminum, the first rotator (11) and the third rotator (13) can rotate in the same direction, and the middle second rotator (12) can rotate in the opposite direction; or the first rotator (11), the second rotator (12) and the third rotator (13) rotate in the same direction.
Further, the first rotating body (11) and the third rotating body (13) share a first driving device and a first transmission structure to realize the rotation in the same direction.
Further, drive arrangement is first motor (2), first drive structure includes drive pulley (3), belt, driven pulley (4), internal drive axle (9) and connecting rod (17), the electric motor rotor of first motor (2) with drive pulley (3) central shaft hole is connected, drive pulley (3) with cup joint between driven pulley (4) the belt, the central shaft hole of driven pulley (4) with an end connection of internal drive axle (9), another tip of internal drive axle (9) with the first center pin fixed connection who turns (11), first turn (11) with third turn (13) outer wall passes through connecting rod (17) are connected.
Further, the second rotator (12) realizes the reverse rotation with the first rotator (11) and the third rotator (13) through a second driving device and a second transmission structure.
Further, the second driving device is a second motor (5), the second driving structure comprises a driving gear (6), a driven gear (7), an outer transmission shaft (8), a connecting support (10), an outer gear annular track (14), a planet gear (15) and an inner gear annular track (16), a motor rotor of the second motor (5) is connected with a central shaft hole of the driving gear (6), the central shaft hole of the driven gear (7) is connected with the upper end part of the outer transmission shaft (8), the driving gear (6) and the driven gear (7) can be continuously meshed, the lower end part of the outer transmission shaft (8) is fixedly connected with the outer gear annular track (14) through the connecting support (10), the inner gear annular track (16) is arranged on the axial outer wall of the second rotating body (12), and the planet gear (15) is arranged between the outer gear annular track (14) and the inner gear annular track (16), the saw teeth on the outer gear annular track (14) which rotates act on the saw teeth of the planet wheels (15), and the planet wheels (15) rotate and then act on the saw teeth of the inner gear annular track (16) through the saw teeth of the planet wheels, so that the rotation direction of the second rotating body (12) is opposite to the movement direction of the outer gear annular track (14); the connecting rod (17) passes through the central shaft hole of the planet wheel (15) and enables the planet wheel (15) to rotate around the connecting rod (17), a part of the inner transmission shaft (9) is inserted into the outer transmission shaft (8) and the two are supported by bearings to ensure that each can rotate in different directions.
Furthermore, the outer surfaces of the first rotator (11), the second rotator (12) and the third rotator (13) are all provided with anti-oxidation coatings.
Further, the first transmission structure and the second transmission structure do not generate a perforation structure for the first rotor (11), the second rotor (12) and the third rotor (13).
Further, the first rotator (11), the second rotator (12) and the third rotator (13) are hollow structures
Further, the first motor and/or the second motor are mounted on a mounting bracket (10).
Further, the inner wall of the crucible (1) is coated with an oxidation resistant coating.
The method for realizing the purification and crystallization of the ultra-high purity aluminum by using the multi-rotor has the following beneficial effects:
(1) according to the invention, the first rotator and the third rotator have low rotating speeds to ensure that the liquid level of the aluminum liquid is not driven, and the second rotator and the third rotator which rotate in opposite directions are matched with each other to ensure that the movement of the aluminum liquid under the liquid level is more active to ensure the quality and quantity of crystallization products, and also to consider that the liquid level is stable and the movement of the aluminum liquid under the liquid level is more active.
(2) According to the invention, the first transmission structure and the second transmission structure do not generate a perforation structure for the first rotating body, the second rotating body and the third rotating body, so that the oxidation-resistant layer is not damaged in a large area, and the damage of aluminum liquid to equipment is reduced.
(3) The crystallization device of the ultra-high purity aluminum can enable the three rotating bodies to rotate in the same direction or in the reverse direction at will, and different requirements are met.
Drawings
FIG. 1: the invention discloses an installation schematic diagram of a multi-rotor purification and crystallization device for ultra-high purity aluminum;
FIG. 2: the invention discloses a structural schematic diagram of a multi-rotor purification and crystallization device for ultra-high purity aluminum;
FIG. 3: fig. 2 is an enlarged schematic view of the planetary gear;
FIG. 4: the invention relates to a sectional view of a multi-rotor purification and crystallization device for ultra-high purity aluminum;
FIG. 5: fig. 4 is a schematic diagram of a three swivel connection.
Description of reference numerals:
1-crucible; 2-a first motor; 3-a driving pulley; 4-a driven pulley; 5-a second motor; 6-driving gear; 7-driven gear; 8-external transmission shaft; 9-inner transmission shaft; 10-connecting the bracket; 11-a first swivel; 12-a second swivel; 13-a third swivel; 14-outer gear circular orbit; 15-a planet wheel; 16-internal gear ring track; 17-a connecting rod; and 18, mounting a bracket.
Detailed Description
The invention is further illustrated below with reference to fig. 1 to 5:
the utility model provides a many converters of super high purity aluminium purification crystallization device, many converters purification crystallization device install 1 top of crucible and the lower extreme stretches into under the aluminium liquid level which characterized in that: the lower end of the purification crystallization device is provided with a first rotator 11, a second rotator 12 and a third rotator 13, the first rotator 11 is positioned right above the second rotator 12, the second rotator 12 is positioned right above the third rotator 13, the first rotator 11 and the third rotator 13 can rotate in the same direction, and the middle second rotator 12 can rotate in the opposite direction; or the first rotator 11, the second rotator 12 and the third rotator 13 rotate in the same direction.
Specifically, the first rotor 11 and the third rotor 13 share the first driving device and the first transmission structure to realize the same-direction rotation of the two. Drive arrangement is first motor 2, first drive structure includes drive pulley 3, the belt, driven pulley 4, internal drive axle 9 and connecting rod 17, first motor 2's motor rotor is connected with 3 central shaft holes of drive pulley, the belt cup joints between drive pulley 3 and the driven pulley 4, driven pulley 4's central shaft hole and internal drive axle 9's an end connection, another tip and the first center pin fixed connection who turns 11 of internal drive axle 9, first turning 11 and the third 13 outer walls of turning are connected through connecting rod 17.
The second rotor 12 is rotated in the opposite direction to the first rotor 11 and the third rotor 13 by a second driving device and a second transmission structure. The second driving device is a second motor 5, the second transmission structure comprises a driving gear 6, a driven gear 7 and an outer transmission shaft 8, the connecting bracket 10, the external gear annular track 14, the planet gears 15 and the internal gear annular track 16, a motor rotor of the second motor 5 is connected with a central shaft hole of the driving gear 6, the central shaft hole of the driven gear 7 is connected with the upper end part of the external transmission shaft 8, the driving gear 6 and the driven gear 7 can be continuously meshed, the lower end part of the external transmission shaft 8 is fixedly connected with the external gear annular track 14 through the connecting bracket 10, the external axial wall of the second rotator 12 is provided with the internal gear annular track 16, the planet gears 15 are arranged between the external gear annular track 14 and the internal gear annular track 16, the saw teeth on the rotating external gear annular track 14 act on the saw teeth of the planet gears 15, and the planet gears 15 rotate and act on the saw teeth of the internal gear annular track 16 through the saw teeth thereof, so that the rotating direction of the second rotator 12 is opposite to the moving direction of the external gear annular track 14; a connecting rod 17 passes through the central shaft hole of the planet wheel 15 and enables the planet wheel 15 to turn around the connecting rod 17, a part of the inner transmission shaft 9 is inserted into the outer transmission shaft 8 and both are supported by bearings ensuring that each can rotate in different directions.
The outer surfaces of the first rotator 11, the second rotator 12 and the third rotator 13 are all provided with an anti-oxidation coating. The first and second transmission structures do not produce a perforated structure for the first, second and third rotors 11, 12, 13.
The first rotor 11, the second rotor 12 and the third rotor 13 are hollow structures, and the first motor and/or the second motor are/is arranged on the mounting bracket 10. The inner wall of the crucible 1 is coated with an oxidation resistant coating.
The invention utilizes a working principle of realizing the purification and crystallization of ultra-high purity aluminum by using multiple rotors, and comprises the following steps:
firstly, melting aluminum raw materials with the purity of 3N-5N into aluminum liquid in a crucible 1, wherein the melting temperature is 660-700 ℃, and the lower end of the crucible 1 is of an arc-shaped structure.
And step two, installing the crystallization device above the crucible 1, wherein the lower end of the crystallization device extends into the liquid level of the aluminum liquid, and continuously introducing 50-100L/min of normal-temperature air into the crystallization device through an air inlet pipe arranged at the upper end of the crystallization device.
Step three, starting the first motor to enable the first rotor 11 and the third rotor 13 to rotate in the same direction, and starting the second motor to enable the second rotor 12 between the first rotor 11 and the third rotor 13 to rotate reversely; more high-purity aluminum liquid is gathered around the first rotor 11, the second rotor 12 and the third rotor 13 in the rotating process and solidified under the action of cooling gas, and finally solidified and deposited at the lower end of the crystallization device to form high-purity aluminum crystals; the first rotator 11 and the third rotator 13 have low rotating speed to ensure that the liquid level of the aluminum liquid is not driven, and the second rotator 12 and the third rotator 13 which rotate in opposite directions are matched with each other to ensure that the aluminum liquid moves more actively under the liquid level to ensure the quality and quantity of crystallization products.
And step four, when the crystal reaches a set half, taking out the crystallization device, stopping rotating, rapidly cooling the lower end of the crystallization device and the crystal in the air, cooling to 280-20 ℃, inserting the crystal into the liquid level of the aluminum liquid again, repeating the step two and the step three until the crystal cannot be increased continuously, stopping rotating, hanging away from the crystallization device, and taking down the crystal.
And step five, cutting off 50-70 mm of the head and the tail of the crystal to obtain a primary purified substance.
And step six, pouring out the residual aluminum liquid in the crucible 1, putting the primary purified substance into the crucible 1 again, and repeating the steps one to five to obtain the ultra-high purity aluminum raw material.
In the third step, the first rotator 11, the second rotator 12 and the third rotator 13 may also rotate in the same direction, and the rotation in the same direction of the second rotator 12 and the rotation in the opposite direction of the second rotator 12 are alternately performed.
In the third step, when the second rotor 12 rotates in the reverse direction with the first rotor 11 and the third rotor 13 for more than ten minutes, the rotor directions of the first motor and the second motor are controlled so that the first rotor 11, the second rotor 12, and the third rotor 13 rotate in the same direction, which is helpful for accelerating the ready-made crystallization product.
The invention is described above with reference to the accompanying drawings, it is obvious that the implementation of the invention is not limited in the above manner, and it is within the scope of the invention to adopt various modifications of the inventive method concept and solution, or to apply the inventive concept and solution directly to other applications without modification.
Claims (4)
1. A method for realizing ultra-high purity aluminum purification crystallization by using a plurality of transformants,
the method comprises the following steps:
firstly, melting aluminum raw materials with the purity of 3N-5N into aluminum liquid in a crucible (1), wherein the melting temperature is 660-700 ℃, and the lower end of the crucible (1) is of an arc-shaped structure;
secondly, mounting a crystallization device above the crucible (1), wherein the lower end of the crystallization device extends below the liquid level of the aluminum liquid, and continuously introducing 50-100L/min of normal-temperature air into the crystallization device through an air inlet pipe arranged at the upper end of the crystallization device;
a first rotator (11), a second rotator (12) and a third rotator (13) are arranged at the lower end of the crystallization device, the first rotator (11) is positioned right above the second rotator (12), the second rotator (12) is positioned right above the third rotator (13), the first rotator (11) and the third rotator (13) are positioned below the liquid level of molten aluminum, the first rotator (11) and the third rotator (13) can rotate in the same direction, and the middle second rotator (12) can rotate in the opposite direction; or the first rotator (11), the second rotator (12) and the third rotator (13) rotate in the same direction; the first rotating body (11) and the third rotating body (13) share a first driving device and a first transmission structure to realize the same-direction rotation of the first driving device and the first transmission structure; the driving device is a first motor (2), the first transmission structure comprises a driving belt pulley (3), a belt, a driven belt pulley (4), an inner transmission shaft (9) and a connecting rod (17), a motor rotor of the first motor (2) is connected with a central shaft hole of the driving belt pulley (3), the belt is sleeved between the driving belt pulley (3) and the driven belt pulley (4), the central shaft hole of the driven belt pulley (4) is connected with one end part of the inner transmission shaft (9), the other end part of the inner transmission shaft (9) is fixedly connected with a central shaft of the first rotating body (11), and the outer walls of the first rotating body (11) and the third rotating body (13) are connected through the connecting rod (17); the second rotating body (12) realizes reverse rotation with the first rotating body (11) and the third rotating body (13) through a second driving device and a second transmission structure; the second driving device is a second motor (5), the second driving structure comprises a driving gear (6), a driven gear (7), an outer driving shaft (8), a connecting support (10), an outer gear annular track (14), a planet gear (15) and an inner gear annular track (16), a motor rotor of the second motor (5) is connected with a central shaft hole of the driving gear (6), the central shaft hole of the driven gear (7) is connected with the upper end part of the outer driving shaft (8), the driving gear (6) can be continuously meshed with the driven gear (7), the lower end part of the outer driving shaft (8) is fixedly connected with the outer gear annular track (14) through the connecting support (10), the axial outer wall of the second rotating body (12) is provided with the inner gear annular track (16), the outer gear annular track (14) is provided with the planet gear (15) between the inner gear annular tracks (16), the saw teeth on the outer gear annular track (14) which rotates act on the saw teeth of the planet wheels (15), and the planet wheels (15) rotate and then act on the saw teeth of the inner gear annular track (16) through the saw teeth of the planet wheels, so that the rotation direction of the second rotating body (12) is opposite to the movement direction of the outer gear annular track (14); the connecting rod (17) passes through the central shaft hole of the planet wheel (15) and enables the planet wheel (15) to rotate around the connecting rod (17), a part of the inner transmission shaft (9) is inserted into the outer transmission shaft (8) and the two are supported by a bearing to ensure that each can rotate in different directions; the first transmission structure and the second transmission structure do not generate a perforation structure for the first rotating body (11), the second rotating body (12) and the third rotating body (13);
step three, a first motor is started to enable the first rotor (11) and the third rotor (13) to rotate in the same direction, and a second motor is started to enable a second rotor (12) between the first rotor (11) and the third rotor (13) to rotate in the opposite direction; more high-purity aluminum liquid is gathered around the first rotor (11), the second rotor (12) and the third rotor (13) in the rotating process and solidified under the action of cooling gas, and finally solidified and deposited at the lower end of the crystallization device to form high-purity aluminum crystals; the first rotator (11) and the third rotator (13) have low rotating speeds to ensure that the liquid level of the aluminum liquid is not driven, and the second rotator (12) and the third rotator (13) which rotate in opposite directions are matched with each other to ensure that the aluminum liquid moves more actively under the liquid level to ensure the quality and quantity of crystallization products;
step four, when the crystals reach a half of the set value, taking out the crystallization device, stopping rotating, rapidly cooling the lower end of the crystallization device and the crystals in the air, cooling to 280-20 ℃, then inserting the crystals below the liquid level of the aluminum liquid again, repeating the step two and the step three until the crystals cannot be increased continuously, stopping rotating, hanging away the crystallization device, and taking down the crystals;
fifthly, cutting off 50-70 mm of the head and the tail of the crystal to obtain a primary purified substance;
and step six, pouring out the residual aluminum liquid in the crucible (1), and putting the primary purified substance into the crucible (1) again to repeat the steps one to five to obtain the ultra-high purity aluminum raw material.
2. The method for realizing the purification and crystallization of the ultra-high purity aluminum by using the multi-rotor according to claim 1, wherein the method comprises the following steps: in the third step, the first rotator (11), the second rotator (12) and the third rotator (13) can also rotate in the same direction, and the rotation in the same direction of the second rotator (12) and the rotation in the opposite direction of the second rotator (12) are alternately performed.
3. The method for realizing the purification and crystallization of the ultra-high purity aluminum by using the multi-rotor according to claim 1, wherein the method comprises the following steps: in the third step, when the second rotor (12) rotates in reverse with the first rotor (11) and the third rotor (13) for more than ten minutes, the rotor directions of the first motor and the second motor are controlled so that the first rotor (11), the second rotor (12) and the third rotor (13) rotate in the same direction, which is beneficial to accelerating the ready-made crystallization product.
4. The method for realizing the purification and crystallization of the ultra-high purity aluminum by using the multi-rotor according to claim 1, wherein the method comprises the following steps: and the inner wall of the crucible (1) and the outer wall of the crystallization device are both provided with an anti-oxidation coating.
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| CN112553473B (en) * | 2020-11-20 | 2022-02-18 | 浙江最成半导体科技有限公司 | High purity aluminum purification method and apparatus |
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