Aluminum purification device

Abstract

The invention discloses and provides an aluminum purification device which comprises a containing assembly, an aluminum purification assembly, a heat exchanger and a heat exchange assembly, and the containing assembly is provided with a containing groove used for containing to-be-purified materials; the heating assembly is used for heating the accommodating assembly; the crystallization assembly is used for crystallizing a to-be-purified material and is suitable for stretching into or withdrawing from the accommodating groove, and a first channel is formed in the crystallization assembly; the gas supply assembly communicates with the first channel and is used for conveying cooling gas to the first channel; and the refrigeration assembly is used for reducing the temperature of the cooling gas in the first channel. According to the aluminum purification device provided by the embodiment of the invention, the cooling effect of the cooling gas on the crystallization assembly can be guaranteed, the phenomenon of insufficient cooling of the crystallization assembly is avoided, then the stability and reliability of the crystallization assembly can be improved, the risks of crystallization assembly damage and material pollution are reduced, the production safety and quality are improved, and the production cost is reduced. And the condensation efficiency and the condensation effect of the crystallization assembly on the liquid-state to-be-purified material can be improved, and reliable guarantee is provided for efficient and stable aluminum purification operation.

Description

Technical Field

[0001] The invention relates to the technical field of pure aluminum preparation, and in particular to an aluminum purification device. Background Art

[0002] In the field of high-purity aluminum refining, the purification methods widely used in industry include three-layer liquid electrolysis and segregation. Since the upper limit of the purity produced by the three-layer liquid electrolysis method is relatively low, in actual applications, the refined aluminum raw materials are usually obtained by the three-layer electrolysis method, and then the refined aluminum raw materials are further purified by the segregation method to obtain ultra-high purity aluminum. However, in actual applications, it is found that during the purification process using the segregation method, the crystallizer is prone to insufficient cooling, which not only easily causes material contamination and limits the improvement of production purity, but also poses a major safety hazard. Summary of the invention

[0003] The present invention aims to solve at least one of the technical problems existing in the prior art or related art.

[0004] In view of this, an aluminum purification device is proposed according to an embodiment of the present invention, comprising:

[0005] A containing assembly is formed with a containing tank, and the containing tank is used to contain the material to be purified;

[0006] A heating component, used for heating the accommodating component;

[0007] A crystallization component, used for crystallizing the material to be purified, suitable for extending into or exiting the containing tank, and a first channel is opened in the crystallization component;

[0008] An air supply component, connected to the first channel, and used for delivering cooling gas to the first channel;

[0009] The refrigeration component is used to reduce the temperature of the cooling gas in the first channel.

[0010] In one possible implementation, the refrigeration assembly includes:

[0011] An evaporation portion is disposed in the first channel, a second channel is formed in the evaporation portion, and the second channel is used for circulating a cooling medium;

[0012] a first compressor, wherein a medium input end of the first compressor is connected to a medium output end of the evaporation part;

[0013] A condensation part, wherein a medium input end of the condensation part is connected to a medium output end of the first compressor;

[0014] The expansion valve is connected between the medium input end of the evaporation part and the medium output end of the condensation part.

[0015] In a feasible embodiment, the air supply assembly includes:

[0016] The gas storage part is formed with a gas storage space, and the gas storage space is used to accommodate cooling gas;

[0017] An air supply pipe connected between the air storage space and the first channel;

[0018] The heat exchange part is connected to the air supply pipe for heat transfer and is used to reduce the temperature of the air supply pipe.

[0019] In a feasible implementation manner, the heat exchange portion includes:

[0020] The cooling tower is formed with a liquid storage space, a liquid inlet and a liquid outlet. The liquid inlet and the liquid outlet are both connected to the liquid storage space. The liquid inlet is used to access cooling liquid. At least part of the air supply pipe is located in the liquid storage space.

[0021] In a feasible implementation manner, the air supply pipe includes a bent pipe section, and the bent pipe section is located in the liquid storage space.

[0022] In a feasible embodiment, the air supply assembly further includes:

[0023] A flow detection unit is provided in the gas supply pipe and is used to obtain the flow information of the cooling gas in the gas supply pipe;

[0024] The second compressor is used to transport cooling gas into the gas storage space.

[0025] In a feasible implementation, the accommodating component includes:

[0026] The crucible portion is formed with a receiving groove;

[0027] A heat insulation part, sleeved on the crucible part;

[0028] The heating component is arranged between the heat insulating part and the crucible part, and the heating component is used for heating the crucible part.

[0029] In a feasible implementation manner, the accommodating component further includes:

[0030] A base portion, wherein the crucible portion is disposed on the base portion;

[0031] The stirring part is arranged on the base part and is used for stirring the material to be purified in the containing tank.

[0032] In a possible implementation, the inner wall of the crucible is provided with an aluminum oxide coating.

[0033] In a feasible implementation manner, the aluminum purification device further comprises:

[0034] The driving assembly includes a first driving part and a second driving part. The first driving part is used to drive the crystallization assembly to extend into or withdraw from the accommodating groove, and the second driving part is used to drive the crystallization assembly to rotate.

[0035] The above description is only an overview of the technical solution provided by the present invention. In order to more clearly understand the technical means of the present invention, it can be implemented according to the contents of the specification. In order to make the above and other features and effects of the present invention more obvious and easy to understand, the implementation methods of the present invention are specifically listed below. BRIEF DESCRIPTION OF THE DRAWINGS

[0036] Various other advantages and benefits will become apparent to those of ordinary skill in the art by reading the detailed description of the exemplary embodiments below. The accompanying drawings are only for the purpose of illustrating exemplary embodiments and are not to be considered as limiting the present invention. Also, the same reference symbols are used throughout the accompanying drawings to represent the same components. In the accompanying drawings:

[0037] Figure 1 A schematic structural diagram of an aluminum purification device according to an embodiment of the present invention.

[0038] in, Figure 1 The corresponding relationship between the reference numerals and the component names is as follows:

[0039] 100' of material to be purified; 200' of cooling medium;

[0040] 100 Aluminum purification device;

[0041] 110 accommodating component; 111 crucible portion; 112 heat insulation portion; 113 base portion; 114 stirring portion;

[0042] 120 heating component;

[0043] 130 crystallization assembly; 131 crystallization cylinder; 132 temperature detection unit;

[0044] 140 air supply assembly; 141 air storage unit; 142 air supply pipe; 143 heat exchange unit; 144 flow detection unit; 145 second compressor;

[0045] 150 refrigeration assembly; 151 evaporation part; 152 first compressor; 153 condensation part; 154 expansion valve; 160 driving assembly; 161 support part; 162 driving arm. DETAILED DESCRIPTION

[0046] The exemplary embodiments of the present invention will be described in more detail below with reference to the accompanying drawings. Although the exemplary embodiments of the present invention are shown in the accompanying drawings, it should be understood that the present invention can be implemented in various forms and should not be limited by the embodiments set forth herein. On the contrary, these embodiments are provided in order to enable a more thorough understanding of the present invention and to enable the scope of the present invention to be fully communicated to those skilled in the art.

[0047] like Figure 1As shown, according to an embodiment of the present invention, an aluminum purification device 100 is proposed, including: a containing component 110, which is formed with a containing tank, and the containing tank is used to contain a material to be purified 100'; a heating component 120, which is used to heat the containing component 110; a crystallization component 130, which is used to crystallize the material to be purified 100' and is suitable for extending into or exiting the containing tank, and a first channel is opened in the crystallization component 130; a gas supply component 140, which is connected to the first channel and is used to transport cooling gas to the first channel; a refrigeration component 150, which is used to reduce the temperature of the cooling gas in the first channel.

[0048] The aluminum purification device 100 provided in the embodiment of the present invention includes the aforementioned accommodating component 110 , the heating component 120 , the crystallizing component 130 , the gas supply component 140 and the refrigeration component 150 . Based on the above-mentioned settings, the aluminum purification device 100 can use the accommodating component 110 to accommodate the material 100' to be purified in actual application, and can melt the material in the accommodating tank into a liquid by heating the accommodating component 110 using the heating component 120, so as to facilitate the purification of the liquid material 100' to be purified by the segregation method; the crystallization component 130 has a certain degree of freedom of movement, and is suitable for extending into or exiting the accommodating tank by moving relative to the accommodating component 110. When extending into the accommodating tank, the crystallization component 130 can come into contact with the material in the accommodating tank, and based on the cooling effect of the cooling gas in the above-mentioned first channel, the temperature of the crystallization component 130 is relatively low, so that part of the liquid material in the accommodating tank solidifies and adheres to the surface of the crystallization component 130, so that the crystallization component 130 can simultaneously bring the attached solidified material out of the accommodating tank after exiting the accommodating tank, and when the crystallization component 130 exits the accommodating tank , the solidified material attached to the surface of the crystallization component 130 can be collected to obtain an aluminum ingot with a higher purity than the material 100' to be purified. In practical applications, the crystallization component 130 can gradually realize the purification of the material 100' to be purified by reciprocating in and out of the accommodating tank; the aforementioned refrigeration component 150 can be used to reduce the temperature of the cooling gas in the aforementioned first channel, so that the cooling gas in the crystallization component 130 is always in a low temperature state, ensuring the cooling effect of the cooling gas on the crystallization component 130, avoiding the phenomenon of insufficient cooling of the crystallization component 130, and thus improving the stability and reliability of the crystallization component 130, reducing the risk of damage to the crystallization component 130 and material contamination, improving production safety and quality, and is conducive to improving the condensation efficiency and condensation effect of the crystallization component 130 on the liquid material 100' to be purified, providing reliable guarantee for the efficient and stable aluminum purification operation.

[0049] It should be noted that the aluminum purification device 100 provided in the embodiment of the present invention can be applied to pure aluminum preparation operations based on the segregation method in actual applications. Accordingly, the aforementioned material 100' to be purified can be but is not limited to refined aluminum raw material.

[0050] It is understandable that the aforementioned cooling gas can be but is not limited to air, nitrogen, inert gas, etc. Compared with the liquid cooling method of the crystallization component 130, the gas cooling method can reduce the risk of aluminum explosion caused by leakage of the coolant, and further reduce production safety hazards.

[0051] It can be understood that, in actual application, the aforementioned crystallization component 130 can be arranged above the notch of the receiving tank and arranged corresponding to the middle area of ​​the receiving tank, and is suitable for lifting and lowering along the depth direction of the receiving tank, so that during the lifting process, the crystallization component 130 can extend into or exit the receiving tank through the notch of the receiving tank; illustratively, the crystallization component 130 may include a crystallization cylinder 131 and a temperature detection portion 132; wherein the crystallization cylinder 131 is a roughly cylindrical cylinder structure, the aforementioned first channel includes the cylinder space of the aforementioned crystallization cylinder 131, and the aforementioned crystallization cylinder 131 is arranged above the notch of the receiving tank and corresponds to the middle area of ​​the receiving tank. The crystallization cylinder 131 is arranged such that the axial direction of the crystallization cylinder 131 is consistent with the depth direction of the aforementioned accommodating groove and is suitable for rising and falling along the depth direction of the accommodating groove. The end of the crystallization cylinder 131 facing the accommodating component 110 is closed and is roughly hemispherical, which is beneficial to reduce the resistance of the end of the crystallization cylinder 131 facing the accommodating component 110 when the liquid material enters and exits, and is beneficial for the liquid material 100' to be purified to adhere to the surface of the crystallization cylinder 131; the aforementioned temperature detection part 132 is used to detect the temperature information of the cooling gas in the first channel, so as to timely grasp the temperature of the cooling gas in the first channel and provide a reference for the temperature control of the cooling gas in the first channel.

[0052] like Figure 1 As shown, in some examples, the refrigeration assembly 150 includes: an evaporator 151, which is arranged in a first channel, and a second channel is formed in the evaporator 151, and the second channel is used to circulate the cooling medium 200'; a first compressor 152, and the medium input end of the first compressor 152 is connected to the medium output end of the evaporator 151; a condenser 153, and the medium input end of the condenser 153 is connected to the medium output end of the first compressor 152; an expansion valve 154, which is connected between the medium input end of the evaporator 151 and the medium output end of the condenser 153.

[0053] In this technical solution, the refrigeration assembly 150 may include the aforementioned evaporation section 151, the first compressor 152, the condensation section 153 and the expansion valve 154. The second channel of the evaporation section 151 may be used to circulate a cooling medium 200' suitable for phase change refrigeration, so that the aforementioned cooling medium 200' absorbs the heat of the cooling gas in the aforementioned first channel to achieve cooling of the cooling gas; the cooling medium 200' in the second channel absorbs the heat and then vaporizes, and the first compressor 152 may absorb the higher temperature gaseous cooling medium 200' out of the second channel and compress it, so that the temperature and pressure of the cooling medium 200' are further increased, and then transported to the condensation section 153; the condensation section 153 may be used to cool the cooling medium 200', so that the cooling medium 200' is converted into Low-temperature and high-pressure liquid state; the pressure of the low-temperature and high-pressure liquid cooling medium 200' can be reduced after flowing through the expansion valve 154, forming a low-temperature and low-pressure gas-liquid mixed cooling medium 200', and flowing back to the second channel; based on this, the refrigeration component 150 can make the cooling medium 200' circulate and produce phase change during operation, and at the same time, the evaporation part 151 can absorb the heat of the cooling gas in the first channel to achieve cooling of the cooling gas, ensuring that the cooling gas in the first channel is in a relatively low temperature state, thereby ensuring the cooling effect of the cooling gas on the crystallization component 130, and avoiding insufficient cooling of the crystallization component 130.

[0054] It is understandable that the aforementioned cooling medium 200' can be but is not limited to R123 (dichlorotrifluoroethane). R123 has a very high critical temperature, can work under high temperature conditions, has good thermal stability and low toxicity, and is non-flammable, which is beneficial to ensure the cooling effect of the refrigeration component 150 on the cooling gas and further improve production safety.

[0055] like Figure 1 As shown, in some examples, the air supply component 140 includes: an air storage portion 141, which forms an air storage space, and the air storage space is used to accommodate cooling gas; an air supply pipe 142, which is connected between the air storage space and the first channel; and a heat exchange portion 143, which is heat-transferably connected to the air supply pipe 142 and is used to reduce the temperature of the cooling gas in the air supply pipe 142.

[0056] In this technical solution, the gas supply component 140 may include the aforementioned gas storage part 141, the gas supply pipe 142 and the heat exchange part 143; based on the aforementioned setting, the gas supply component 140 can use the gas storage part 141 and the gas supply pipe 142 to supply cooling gas to the aforementioned first channel, and can use the heat exchange part 143 to reduce the temperature of the cooling gas, so that the cooling gas can be in a lower temperature state when entering the first channel, further ensuring the cooling effect of the cooling gas on the crystallization component 130, and avoiding insufficient cooling of the crystallization component 130.

[0057] In some feasible examples, the aforementioned gas storage portion 141 may include a gas storage tank and a gas storage tank support disposed at the bottom of the gas storage tank.

[0058] In some examples, the heat exchange portion 143 includes: a cooling tower, which is formed with a liquid storage space, a liquid inlet and a liquid outlet, the liquid inlet and the liquid outlet are both connected to the liquid storage space, the liquid inlet is used to connect the cooling liquid, and at least part of the air supply pipe 142 is located in the liquid storage space.

[0059] In this technical solution, the heat exchange part 143 may include the aforementioned cooling tower; based on the aforementioned setting, the heat exchange part 143 may utilize the cooling liquid to absorb the heat of the cooling gas in the air supply pipe 142, thereby reducing the temperature of the cooling gas, so that the cooling gas can be in a lower temperature state when entering the first channel, further ensuring the cooling effect of the cooling gas on the crystallization component 130, and avoiding insufficient cooling of the crystallization component 130.

[0060] It can be understood that the aforementioned cooling liquid can be but is not limited to water. In actual applications, the aforementioned liquid inlet and the aforementioned liquid outlet can be connected to a water supply and drainage system, the liquid inlet can be used to connect the cooling liquid, and the liquid outlet can be used to discharge the cooling liquid, so that the cooling liquid in the liquid storage space can be circulated and renewed, which is beneficial to ensure that the temperature of the cooling liquid in the liquid storage space is at a lower state.

[0061] In some feasible examples, the temperature of the cooling liquid in the liquid storage space is greater than or equal to 5° C. and less than or equal to 15° C., which is beneficial to ensure the cooling effect of the cooling liquid on the cooling gas.

[0062] In some feasible examples, the aforementioned heat exchange part 143 also includes a cooling tower base arranged at the bottom of the cooling tower.

[0063] In some examples, the air supply pipe 142 includes a bent pipe section, and the bent pipe section is located in the liquid storage space.

[0064] In this technical solution, the air supply pipe 142 may include a bent pipe section located in the liquid storage space; based on the above-mentioned arrangement, the extension length of the air supply pipe 142 in the liquid storage space can be extended, thereby increasing the heat exchange area between the air supply pipe 142 and the cooling liquid, and improving the cooling effect of the heat exchange part 143 on the cooling gas, so that the cooling gas can be in a lower temperature state when entering the first channel, further ensuring the cooling effect of the cooling gas on the crystallization component 130, and avoiding insufficient cooling of the crystallization component 130.

[0065] It can be understood that the aforementioned bent pipe segment can be roughly in the shape of but not limited to a spiral or S-shape, etc.; the number of the aforementioned bent pipe segments can be multiple, and the multiple bent pipe segments can be connected in series, thereby further extending the extension length of the air supply pipe 142 in the liquid storage space.

[0066] like Figure 1 As shown, in some examples, the air supply component 140 also includes: a flow detection unit 144, which is arranged in the air supply pipe 142 and is used to obtain the cooling gas flow information in the air supply pipe 142; and a second compressor 145, which is used to transport the cooling gas into the air storage space.

[0067] In this technical solution, the air supply component 140 can also include the aforementioned flow detection unit 144 and the aforementioned second compressor 145; based on the aforementioned setting, the air supply component 140 can use the second compressor 145 to replenish the cooling gas in the air storage unit 141, and provide power for the cooling gas to flow to the first channel. The air storage unit 141 can stabilize the connected cooling gas, and the aforementioned flow detection unit 144 can be used to obtain the cooling gas flow information in the air supply pipe 142, so as to timely grasp the cooling gas flow situation in the air supply pipe 142, and provide a reference for the regulation of the air supply parameters.

[0068] It can be understood that the second compressor 145 can be an air compressor, and the cooling gas can be air, thereby reducing the cost of obtaining the cooling gas.

[0069] In some feasible examples, the flow detection unit 144 may also be used to adjust the gas flow of the gas supply pipe 142 .

[0070] In some feasible examples, the gas flow rate of the gas supply pipe 142 is greater than or equal to 1 m 3 / min and less than or equal to 10m 3 / min, which is beneficial to ensure the cooling effect of the cooling gas on the crystallization component 130.

[0071] like Figure 1 As shown, in some examples, the accommodating component 110 includes: a crucible portion 111 formed with a accommodating groove; an insulating portion 112 sleeved on the crucible portion 111; wherein the heating component 120 is disposed between the insulating portion 112 and the crucible portion 111, and the heating component 120 is used to heat the crucible portion 111.

[0072] In this technical solution, the accommodating component 110 may include the aforementioned crucible portion 111 and the aforementioned heat insulation portion 112; based on the aforementioned arrangement, the accommodating component 110 may utilize the crucible portion 111 to accommodate the material 100' to be purified, and utilize the heat insulation portion 112 to reduce the heat loss of the crucible portion 111 and the heating component 120, which is beneficial to improving the heating efficiency and heat preservation effect of the raw material to be purified, and providing further guarantee for the efficient and stable progress of the aluminum purification operation.

[0073] It can be understood that the aforementioned heat insulation part 112 can be made of heat insulation material.

[0074] In some feasible examples, the heating assembly 120 may include a plurality of heating resistance wires, and the plurality of heating resistance wires are evenly arranged along the axial direction of the crucible portion 111 , thereby further improving the heating uniformity and heating efficiency of the crucible portion 111 .

[0075] like Figure 1 As shown, in some examples, the containing assembly 110 further includes: a base portion 113, the crucible portion 111 is disposed on the base portion 113; and a stirring portion 114, disposed on the base portion 113, for stirring the material to be purified 100' in the containing tank.

[0076] In this technical solution, the accommodating component 110 may also include the aforementioned base portion 113 and the aforementioned stirring portion 114; based on the aforementioned arrangement, the accommodating component 110 may utilize the base portion 113 to support the aforementioned crucible portion 111, the heat insulation portion 112, the heating component 120 and the stirring portion 114, thereby improving the installation stability of the aforementioned various components or assemblies, and providing further guarantee for the efficient and stable performance of the aluminum purification operation; the aforementioned stirring portion 114 may be used to stir the material to be purified 100' in the accommodating tank, thereby improving the uniformity of the material to be purified 100', which is beneficial to ensuring the purification effect.

[0077] It is understandable that if Figure 1 As shown, the crucible portion 111 and the heat insulating portion 112 may both be disposed above the base portion 113 .

[0078] In some feasible examples, the aforementioned stirring part 114 may include an electromagnetic stirrer, which is arranged on both sides of the base part 113 and is used to generate an electromagnetic field, so as to utilize the electromagnetic field to disturb the material to be purified 100', thereby realizing non-contact stirring of the material to be purified 100' and reducing the occupation of the internal space of the containing tank by the stirring part 114.

[0079] In some examples, the inner wall of the crucible portion 111 is provided with an alumina coating.

[0080] In this technical solution, an aluminum oxide coating may be provided on the inner wall of the crucible 111 , thereby improving the cleanliness of the inner wall of the crucible 111 , reducing the risk of impurities being mixed into the material 100 ′ to be purified, and further improving the aluminum purification effect.

[0081] In some feasible examples, the aforementioned aluminum oxide coating may be a high-purity aluminum oxide coating.

[0082] In some feasible examples, the outer wall of the crystallization component 130 may be provided with an aluminum oxide coating, thereby improving the cleanliness of the outer wall of the crystallization component 130 and reducing the risk of impurities being mixed into the material 100' to be purified, which is beneficial to further improve the aluminum purification effect.

[0083] like Figure 1 As shown, in some examples, the aluminum purification device 100 further includes: a driving assembly 160, the driving assembly 160 includes a first driving part and a second driving part, the first driving part is used to drive the crystallization assembly 130 to extend into or withdraw from the accommodating tank, and the second driving part is used to drive the crystallization assembly 130 to rotate.

[0084] In this technical solution, the aluminum purification device 100 may also include the aforementioned driving assembly 160; based on the aforementioned setting, the aluminum purification device 100 uses the driving assembly 160 to drive the crystallization assembly 130 to move, so that the crystallization assembly 130 can enter and exit the receiving tank and / or rotate relative to the receiving tank, thereby improving the convenience of use of the aluminum purification device 100. During use, when the crystallization assembly 130 extends into the receiving tank, the driving assembly 160 can drive the crystallization assembly 130 to rotate through the second driving part, so that the crystallization assembly 130 disturbs the material to be purified 100' and promotes the rotation flow of the material to be purified 100', which can facilitate the liquid material to be purified 100' to crystallize into high-purity crystals on the surface of the crystallization assembly 130, increase the flow of the solid-liquid interface, and improve the diffusion effect of the solute, which is conducive to improving the purity of the obtained aluminum ingot, and improving the adaptability of the aluminum purification device 100 to the preparation of high-purity aluminum or ultra-high-purity aluminum.

[0085] It is understandable that by controlling the rotation of the crystallization assembly 130 during the crystallization process, the solidified material brought out by the crystallization cylinder 131 can be roughly mushroom-shaped, and there is no need to cut off the head and tail of the obtained aluminum ingot, which is beneficial to reducing the purification cost and is more suitable for industrial production.

[0086] like Figure 1 As shown, in some feasible examples, the driving assembly 160 may include a support portion 161 and a driving arm 162, the driving arm 162 includes an arm frame, the first driving portion and the second driving portion, the arm frame is arranged on the support portion 161, and the first driving portion and the second driving portion are arranged on the arm frame.

[0087] The embodiment of the present invention further provides an aluminum purification method, which is used in any of the aluminum purification devices 100 proposed above. The aluminum purification method includes:

[0088] Step 1: Mechanically cut, pickle and dry the refined aluminum raw material to obtain the material to be purified 100'. The pickling may be performed using a hydrofluoric acid solution, the pH value of the hydrofluoric acid solution may be less than or equal to 2, and the pickling time may be 30 min-90 min.

[0089] Step 2: Grind and clean the containing component 110 to ensure that the surface of the containing component 110 is clean and rust-free, and then evenly apply a coating on the inner surface of the containing component 110 and the outer surface of the crystallization component 130, and place the material to be purified 100' in the containing tank. The coating can be, but is not limited to, an aluminum oxide coating;

[0090] Step 3: heating the containing component 110 to melt the raw material to be purified. After the raw material to be purified is completely melted, the liquid raw material to be purified is kept warm at a temperature of 660-700° C.;

[0091] Step 4: Extend the crystallization assembly 130 into the receiving tank so that at least part of the crystallization assembly 130 is located below the liquid surface of the raw material to be purified, and control the rotation of the crystallization assembly 130 so that the crystallization assembly 130 drives the liquid material to be purified 100' to rotate and flow. The length of the crystallization assembly 130 extending below the liquid surface of the raw material to be purified can be 5-50 cm, the rotation speed of the crystallization assembly 130 can be 50-500 r / min, and the crystallization time can be 30 min-90 min;

[0092] Step 5: After the crystallization is completed, the crystallization assembly 130 is quickly withdrawn from the containing tank to obtain a mushroom-shaped aluminum ingot;

[0093] Step 6: After preparing a preset number of mushroom-shaped aluminum ingots, use the mushroom-shaped aluminum ingots as raw materials and repeat steps 1 to 5 multiple times to obtain ultra-high purity mushroom-shaped aluminum ingots. It can be understood that the more times steps 1 to 5 are repeated, the higher the purity of the obtained mushroom-shaped aluminum ingots, so the number of times steps 1 to 5 are repeated can be selected in combination with actual needs, for example, 2 times, 3 times, 4 times, etc. The aforementioned preset number can be selected in combination with actual needs, and no excessive restrictions are made here.

[0094] As a specific example of the aluminum purification method provided by the present invention, the aluminum purification method includes:

[0095] Step 11: mechanically cut the 4N refined aluminum raw material ingot to obtain a number of small ingots, then put the small ingots into a hydrofluoric acid solution with a pH value of 1 for pickling for 40 minutes, and fully dry them after pickling to obtain the material to be purified 100';

[0096] Step 21: Grind and clean the containing component 110 to ensure that the surface of the containing component 110 is clean and rust-free, then evenly apply a high-purity alumina coating on the inner surface of the containing component 110 and the outer surface of the crystallization component 130, and place the material to be purified 100' in the containing tank;

[0097] Step 31: heating the containing component 110 to melt the raw material to be purified. After the raw material to be purified is completely melted, the liquid raw material to be purified is kept warm at a temperature of 680° C.;

[0098] Step 41: Continue to introduce cooling gas into the crystallization assembly 130, with a cooling gas flow rate of 1.3-1.5 m 3 / min, the crystallization component 130 is inserted into the aluminum liquid under the liquid surface at a speed of 40-50r / min, while rotating, and the insertion length is 5cm, and then the rotation speed of the crystallization component 130 is adjusted to 140-150r / min, so that the crystallization component 130 drives the aluminum liquid to rotate and flow, and cooling gas is continuously introduced into the crystallization component 130 during the rotation process, and the refrigeration component 150 is kept in operation, so that the aluminum liquid is continuously crystallized on the outer wall of the crystallization component 130;

[0099] Step 51: After 40 minutes of crystallization, the rotation speed of the crystallization assembly 130 is adjusted to 40-50 r / min, and the crystallization assembly 130 is lifted out of the aluminum liquid. After the crystallization assembly 130 and the aluminum ingot attached thereto are completely lifted out of the aluminum liquid, the crystallization assembly 130 is stopped from rotating, and the aluminum ingot attached to the crystallization assembly 130 is removed to obtain a mushroom-shaped aluminum ingot;

[0100] Step 61: After preparing a preset number of mushroom-shaped aluminum ingots, use the mushroom-shaped aluminum ingots as raw materials and repeat steps 1 to 5 twice or three times to obtain ultra-high purity mushroom-shaped aluminum ingots.

[0101] The composition of the aluminum ingot obtained by the above-mentioned example based on the aluminum purification method was tested, and the results are shown in Table 1.

[0102] Table 1 Aluminum ingot composition test results

[0103] element Si Fe Cu Zn Ti Ga Pb Cd Ag Content (ppm) 0.32 0.31 0.44 0.10 0.06 0.06 ＜0.005 ＜0.01 ＜0.01 element In V B Mg Cr Mn Ni Zr Al Content (ppm) ＜0.01 0.24 0.08 0.16 0.09 0.06 ＜0.005 0.02 99.9998％

[0104] In the present invention, the terms "first", "second", and "third" are used for descriptive purposes only and should not be understood as indicating or implying relative importance; the term "plurality" refers to two or more, unless otherwise clearly defined. The terms "installed", "connected", "connected", "fixed", etc. should be understood in a broad sense. For example, "connected" can be a fixed connection, a detachable connection, or an integral connection; "connected" can be a direct connection or an indirect connection through an intermediate medium. For those of ordinary skill in the art, the specific meanings of the above terms in the present invention can be understood according to specific circumstances.

[0105] In the description of the present invention, it is necessary to understand that the directions or positional relationships indicated by terms such as “upper”, “lower”, “left”, “right”, “front” and “back” are based on the directions or positional relationships shown in the accompanying drawings, and are only for the convenience of describing the present invention and simplifying the description, rather than indicating or implying that the device or unit referred to must have a specific direction, be constructed and operated in a specific orientation, and therefore, cannot be understood as a limitation on the present invention.

[0106] In the description of this specification, the description of the terms "one embodiment", "some embodiments", "specific embodiments", etc. means that the specific features, structures, materials or characteristics described in conjunction with the embodiment or example are included in at least one embodiment or example of the present invention. In this specification, the schematic representation of the above terms does not necessarily refer to the same embodiment or example. Moreover, the specific features, structures, materials or characteristics described can be combined in any one or more embodiments or examples in a suitable manner.

[0107] The above are only preferred embodiments of the present invention and are not intended to limit the present invention. For those skilled in the art, the present invention may have various modifications and variations. Any modification, equivalent replacement, improvement, etc. made within the spirit and principle of the present invention shall be included in the protection scope of the invention.

Claims

1. An aluminum purification device, characterized in that: include: A containing assembly, formed with a containing tank, the containing tank being used to contain the material to be purified; A heating component, used for heating the accommodating component; A crystallization component, used for crystallizing the material to be purified, suitable for extending into or exiting the containing tank, and a first channel is opened in the crystallization component; an air supply component, connected to the first channel, and used for delivering cooling gas to the first channel; A refrigeration component is used to reduce the temperature of the cooling gas in the first channel.

2. The aluminum purification device according to claim 1, characterized in that: The refrigeration assembly comprises: an evaporation portion, disposed in the first channel, wherein a second channel is formed in the evaporation portion, and the second channel is used for circulating a cooling medium; a first compressor, wherein a medium input end of the first compressor is connected to a medium output end of the evaporation portion; a condensing part, wherein a medium input end of the condensing part is connected to a medium output end of the first compressor; The expansion valve is connected between the medium input end of the evaporation part and the medium output end of the condensation part.

3. The aluminum purification device according to claim 1, characterized in that: The gas supply assembly comprises: A gas storage portion, forming a gas storage space, wherein the gas storage space is used to accommodate the cooling gas; an air supply pipe, connected between the air storage space and the first channel; The heat exchange part is heat-conductingly connected to the air supply pipe and is used to reduce the temperature of the cooling gas in the air supply pipe.

4. The aluminum purification device according to claim 3, characterized in that: The heat exchange part comprises: The cooling tower is formed with a liquid storage space, a liquid inlet and a liquid outlet. The liquid inlet and the liquid outlet are both connected to the liquid storage space. The liquid inlet is used to receive cooling liquid. At least part of the air supply pipe is located in the liquid storage space.

5. The aluminum purification device according to claim 4, characterized in that: The air supply pipe includes a bent pipe section, and the bent pipe section is located in the liquid storage space.

6. The aluminum purification device according to claim 3, characterized in that: The air supply assembly also includes: A flow detection unit, arranged in the air supply pipe, for obtaining the flow information of the cooling gas in the air supply pipe; The second compressor is used to transport the cooling gas into the gas storage space.

7. The aluminum purification device according to any one of claims 1 to 6, characterized in that: The accommodating component comprises: A crucible portion, formed with the containing groove; A heat insulation part, sleeved on the crucible part; Wherein, the heating component is arranged between the heat insulation part and the crucible part, and the heating component is used for heating the crucible part.

8. The aluminum purification device according to claim 7, characterized in that: The accommodating component also includes: a base portion, wherein the crucible portion is disposed on the base portion; The stirring part is arranged on the base part and is used for stirring the material to be purified in the containing tank.

9. The aluminum purification device according to claim 7, characterized in that: The inner wall of the crucible portion is provided with an aluminum oxide coating.

10. The aluminum purification device according to any one of claims 1 to 6, characterized in that: Also includes: The driving assembly includes a first driving part and a second driving part, wherein the first driving part is used to drive the crystallization assembly to extend into or withdraw from the containing groove, and the second driving part is used to drive the crystallization assembly to rotate.

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