Stirring kettle suitable for sand mill

Abstract

The utility model relates to the technical field of stirring equipment, and discloses a stirring kettle suitable for a sand mill, which comprises a stirring component, a bracket and a kettle body arranged above the bracket, the stirring assembly is used for stirring materials in the kettle body; the top of the kettle body is provided with a feed port used for being communicated with a sand mill and an observation window capable of being opened and closed, and the bottom of the kettle body is provided with a discharge port used for being communicated with the sand mill and a discharge valve arranged at the discharge port; an argon inlet and an argon flow regulator are arranged at the upper part of the kettle body; a nitrogen inlet and a nitrogen flow regulator are arranged at the lower part of the kettle body; the bracket comprises a bracket body and a bearing part; the top face of the bearing part is an arc-shaped face, and a passing opening is formed in the bottom of the arc-shaped face in a penetrating mode. The bottom of the kettle body can be in fit contact with the arc-shaped surface, and the bottom of the kettle body can penetrate through the passing opening. According to the technical scheme provided by the utility model, the problem that the iron-based polyanion material of the sodium-ion battery is easy to oxidize in a stirring link can be well solved.

Description

Technical Field

[0001] The utility model relates to the technical field of stirring equipment, in particular to a stirring kettle suitable for a sand mill. Background Art

[0002] With its innovative crushing mechanism and superior grinding performance, sand mills offer unparalleled advantages in the fine processing of iron-based polyanion materials for sodium-ion batteries. This precision grinding process effectively promotes uniform particle size refinement, laying a solid foundation for subsequent processing. In the preparation process of iron-based polyanion materials for sodium-ion batteries, grinding is followed by stirring. During this stirring process, a critical concern is the material's oxidative stability. Since the material surface inevitably comes into direct contact with oxygen in the surrounding air during stirring, this direct contact not only expands the surface area for oxidation reactions but also accelerates the reaction rate. This is particularly true in open operating environments with unimpeded air flow, further increasing the risk of oxidation. Furthermore, prolonged or intense stirring creates an ideal environment for oxidation reactions. This continuous exposure to oxygen causes the iron-based polyanion materials for sodium-ion batteries to gradually oxidize, leading to changes in their physical and chemical properties, such as darkening of color and decreased purity. These changes are directly reflected in the performance of the final product, manifesting as significant reductions in conductivity, stability, and cycle life, which in turn impact the product's market competitiveness and application value.

[0003] Iron-based polyanion materials for sodium ion batteries have poor electrical conductivity and are easily decomposed under high temperature conditions. Therefore, it is impossible to add an organic carbon source during the sintering process, as is done in the preparation of lithium iron phosphate for lithium ion batteries. This is because the organic carbon source has a high decomposition temperature, while the sodium polyanion material has a low sintering temperature, and the organic carbon source cannot be effectively carbonized to act as a conductive agent and reducing agent. Therefore, when using equipment such as a sand mill to prepare iron-based polyanion materials for sodium ion batteries, effective measures must be taken to reduce the risk of oxidation of the material during the stirring process, which has become a key link in improving product quality and stability. Therefore, the utility model proposes a stirring kettle suitable for a sand mill to solve the problem of easy oxidation of iron-based polyanion materials for sodium ion batteries during the stirring process. Utility Model Content

[0004] The main purpose of the utility model is to provide a stirring kettle suitable for a sand mill to solve the problem that the iron-based polyanion material of a sodium ion battery is easily oxidized during the stirring process.

[0005] In order to achieve the above-mentioned purpose, the stirring kettle suitable for a sand mill proposed in the present invention comprises a stirring assembly, a bracket, and a kettle body arranged above the bracket; the stirring assembly is used to stir the material in the kettle body; the top of the kettle body is provided with a feed port for communicating with the discharge port of the sand mill, and an observation window that can be opened and closed; the bottom of the kettle body is provided with a discharge port for communicating with the feed port of the sand mill, and a discharge valve arranged at the discharge port; the upper part of the kettle body is provided with an argon gas inlet and an argon gas flow regulator, and the argon gas flow regulator is used to adjust the Regulate the argon gas entering the argon inlet; a nitrogen inlet and a nitrogen flow regulator are provided at the lower part of the kettle body, and the nitrogen flow regulator is used to regulate the nitrogen gas entering the nitrogen inlet; the bracket includes a frame body and a supporting part for supporting the kettle body; the supporting part is connected to the frame body; the top surface of the supporting part is an arc-shaped surface, and a through-port is opened through the bottom of the arc-shaped surface; the bottom of the kettle body can be in contact with the arc-shaped surface, and the bottom of the kettle body can pass through the through-port, so that the discharge valve is located below the supporting part.

[0006] Preferably, the stirring assembly includes a motor, a stirring shaft and a stirring paddle; a mounting bracket is provided above the kettle body; the motor is mounted on the mounting bracket, one end of the stirring shaft is coaxially connected to the rotating shaft of the motor, and the other end of the stirring shaft extends into the kettle body and is connected to the stirring paddle.

[0007] Preferably, the frame includes a plurality of vertically arranged vertical poles and a plurality of first cross bars connecting adjacent vertical poles; the first cross bars are connected to the lower parts of the vertical poles, and the plurality of first cross bars are located in the same horizontal plane; the number of the first cross bars is the same as that of the vertical poles; a plurality of connecting parts are provided on the side of the supporting part, the connecting parts correspond one-to-one to the first cross bars, and the connecting parts are connected to the corresponding first cross bars.

[0008] Preferably, a connecting groove is provided in the middle of the first crossbar, the connecting groove corresponds to the connecting portion one-to-one, and the connecting portion is embedded in the corresponding connecting groove.

[0009] Preferably, the frame also includes multiple second cross bars connecting adjacent vertical poles; the second cross bars are connected to the upper part of the vertical poles, and multiple second cross bars are located in the same horizontal plane; the number of the second cross bars is the same as that of the vertical poles; the second cross bars can abut the side wall of the kettle body.

[0010] Preferably, the bracket further includes a lifting cylinder; the number of the lifting cylinders is consistent with the number of the vertical poles, and they correspond one to one; the telescopic ends of the lifting cylinders are connected to the bottom ends of the corresponding vertical poles to lift the frame.

[0011] Preferably, the bracket further includes a plurality of third cross bars connecting adjacent lifting cylinders; the number of the third cross bars is the same as the number of the lifting cylinders; and the plurality of third cross bars are located in the same horizontal plane.

[0012] Preferably, the bracket further includes a pulley; the number of the pulleys is the same as that of the lifting cylinders, and they correspond one to one; the pulley is connected to the end of the corresponding lifting cylinder away from the vertical pole; the pulley is a universal wheel, and the pulley is provided with a brake.

[0013] Preferably, the number of the argon gas inlets is 2, and the two argon gas inlets are respectively arranged on two opposite sides of the upper part of the kettle body; the number of the nitrogen gas inlets is 2, and the two nitrogen gas inlets are respectively arranged on two opposite sides of the lower part of the kettle body.

[0014] Preferably, a protective pad is provided on one side of the second cross bar for abutting against the side wall of the kettle body.

[0015] In the technical solution of the present invention, the feed port of the kettle body is connected to the discharge port of the sand mill, and the discharge port of the kettle body is connected to the feed port of the sand mill. Therefore, the kettle body and the sand mill can be connected, thereby forming a sand milling cycle, which is beneficial to improving the preparation efficiency and quality of the iron-based polyanion material for sodium ion batteries; the top of the kettle body 1 is provided with the observation window 11 that can be opened and closed, the upper part of the kettle body 1 is provided with the argon gas inlet 14 and the argon gas flow regulator 15, and the lower part of the kettle body 1 is provided with the nitrogen gas inlet 16 and the nitrogen gas flow regulator 17. Therefore, the kettle body 1 Argon gas can be introduced into the upper part of the kettle body, and nitrogen gas can be introduced into the lower part of the kettle body. The sinking of argon gas and the rising of nitrogen gas can discharge the oxygen in the kettle body 1 from the observation window 11, thereby reducing the oxygen content in the kettle body 1 and forming an oxygen-free environment in the kettle body 1 to prevent the oxidation of the iron-based polyanion material of the sodium ion battery; the bracket 2 is provided with the supporting portion 26, and the arc-shaped top surface of the supporting portion 26 can be in contact with the bottom surface of the kettle body 1 and support the kettle body 1. Therefore, the bracket 2 can provide good support for the kettle body 1 and ensure the stability of the kettle body 1. In summary, the stirring kettle suitable for a sand mill can be used in conjunction with a sand mill, thereby improving production efficiency and production quality, and can effectively discharge oxygen in the kettle body to prevent the oxidation of the iron-based polyanion material of the sodium ion battery. BRIEF DESCRIPTION OF THE DRAWINGS

[0016] In order to more clearly illustrate the embodiments of the present invention or the technical solutions in the prior art, the following briefly introduces the drawings required for use in the embodiments or the description of the prior art. Obviously, the drawings described below are only some embodiments of the present invention. For ordinary technicians in this field, other drawings can be obtained based on the structures shown in these drawings without paying any creative work.

[0017] Figure 1 This is a schematic structural diagram of a stirring kettle suitable for a sand mill according to the present invention;

[0018] Figure 2 This is a top view of the support of the stirring kettle suitable for a sand mill according to the present invention.

[0019] Description of Figure Numbers:

[0020] 1- kettle body; 11- observation window; 12- feed port; 13- discharge valve; 14- argon inlet; 15- argon flow regulator; 16- nitrogen inlet; 17- nitrogen flow regulator; 2- bracket; 21- lifting cylinder; 22- vertical pole; 23- second cross bar; 231- protective pad; 24- first cross bar; 25- third cross bar; 26- supporting part; 261- through port; 27- connecting part; 3- mounting bracket; 4- motor; 5- stirring shaft; 6- stirring paddle; 7- pulley.

[0021] The realization of the purpose, functional features and advantages of the present invention will be further explained in conjunction with embodiments and with reference to the accompanying drawings. DETAILED DESCRIPTION

[0022] The following will be combined with the drawings in the embodiments of the present invention to clearly and completely describe the technical solutions in the embodiments of the present invention. Obviously, the embodiments described are only part of the embodiments of the present invention, not all of the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in this field without making creative efforts are within the scope of protection of the present invention.

[0023] It should be noted that all directional indications (such as up, down, left, right, front, back, etc.) in the embodiments of the present invention are only used to explain the relative position relationship, movement status, etc. between the various components under a certain specific posture (as shown in the accompanying drawings). If the specific posture changes, the directional indication will also change accordingly.

[0024] In addition, the terms "first," "second," and so on, used in this utility model are for descriptive purposes only and should not be construed as indicating or implying relative importance or implicitly specifying the number of technical features indicated. Therefore, features specified as "first" or "second" may explicitly or implicitly include at least one such feature. In the description of this utility model, "plurality" means at least two, such as two, three, etc., unless otherwise specifically defined.

[0025] In this utility model, unless otherwise specified or limited, the terms "connection" and "fixation" should be understood in a broad sense. For example, "fixation" can mean fixed connection, detachable connection, or integration; mechanical connection or electrical connection; direct connection or indirect connection through an intermediate medium; internal communication between two elements or interaction between two elements, unless otherwise specified. For those skilled in the art, the specific meanings of the above terms in this utility model can be understood according to specific circumstances.

[0026] In addition, the technical solutions between the various embodiments of the present invention can be combined with each other, but it must be based on the fact that ordinary technicians in this field can implement it. When the combination of technical solutions is contradictory or cannot be implemented, it should be deemed that such a combination of technical solutions does not exist and is not within the scope of protection required by this utility model.

[0027] The utility model provides a stirring kettle suitable for a sand mill.

[0028] Please refer to Figures 1 to 2 The stirring kettle suitable for a sand mill comprises a stirring assembly, a bracket 2, and a kettle body 1 arranged above the bracket 2; the stirring assembly is used to stir the material in the kettle body 1; the top of the kettle body 1 is provided with a feed port 12 for communicating with the discharge port of the sand mill, and an observation window 11 that can be opened and closed; the bottom of the kettle body 1 is provided with a discharge port for communicating with the feed port of the sand mill, and a discharge valve 13 arranged at the discharge port; the upper part of the kettle body 1 is provided with an argon gas inlet 14 and an argon gas flow regulator 15, the argon gas flow regulator 15 is used to adjust the argon gas flowing into the argon gas inlet 14 gas; a nitrogen inlet 16 and a nitrogen flow regulator 17 are provided at the lower part of the kettle body 1, and the nitrogen flow regulator 17 is used to regulate the nitrogen entering the nitrogen inlet 16); the bracket 2 includes a frame body and a supporting portion 26 for receiving the kettle body 1; the supporting portion 26 is connected to the frame body; the top surface of the supporting portion 26 is an arc-shaped surface, and a through-port 261 is provided through the bottom of the arc-shaped surface; the bottom of the kettle body 1 can be in contact with the arc-shaped surface, and the bottom of the kettle body 1 can pass through the through-port 261, so that the discharge valve 13 is located below the supporting portion 26.

[0029] In the technical solution of the present invention, the feed port of the kettle body 1 is connected to the discharge port of the sand mill, and the discharge port of the kettle body 1 is connected to the feed port of the sand mill. Therefore, the kettle body 1 and the sand mill can be connected, thereby forming a sand milling cycle, which is beneficial to improving the preparation efficiency and quality of the iron-based polyanion material for sodium ion batteries; the top of the kettle body 1 is provided with the observation window 11 that can be opened and closed, the upper part of the kettle body 1 is provided with the argon gas inlet 14 and the argon gas flow regulator 15, and the lower part of the kettle body 1 is provided with the nitrogen gas inlet 16 and the nitrogen gas flow regulator 17. Therefore, the kettle Argon gas can be introduced into the upper part of the kettle body 1, and nitrogen gas can be introduced into the lower part of the kettle body. The sinking of argon gas and the rising of nitrogen gas can discharge the oxygen in the kettle body 1 from the observation window 11, thereby reducing the oxygen content in the kettle body 1 and forming an oxygen-free environment in the kettle body 1 to prevent the oxidation of the iron-based polyanion material of the sodium ion battery. The bracket 2 is provided with the supporting portion 26, and the arc-shaped top surface of the supporting portion 26 can fit in contact with the bottom surface of the kettle body 1 and support the kettle body 1. Therefore, the bracket 2 can provide good support for the kettle body 1 and ensure the stability of the kettle body 1. In summary, the stirring kettle suitable for a sand mill can be used in conjunction with a sand mill, thereby improving production efficiency and production quality, and can effectively discharge oxygen in the kettle body to prevent the oxidation of the iron-based polyanion material of the sodium ion battery.

[0030] Specifically, the top surface of the material is located below the nitrogen inlet 16 to prevent the nitrogen inlet 16 from being blocked; the observation window 11 is rotatably connected to the top of the kettle body 1; the bottom surface of the kettle body 1 is an arc-shaped surface, so that the bottom surface of the kettle body 1 can fit in contact with the top surface of the supporting portion 26, thereby increasing the stability of the kettle body 1; the through port 261 is located in the middle of the supporting portion 26.

[0031] Furthermore, an oxygen content meter is provided in the kettle body 1 to detect the oxygen content in the kettle body 1; the discharge valve 13 can be a double-headed valve, one of the outlets of the discharge valve 13 is used to connect to the feed port of the sand mill to control the speed of the sand milling cycle, and the other outlet of the discharge valve 13 can be used for sampling to help judge the state of the material, so as to make timely adjustments, which is beneficial to quality control in the production process; the nitrogen inlet 16 can be set at an angle, and a backflush system can be set to avoid the nitrogen inlet 16 being blocked.

[0032] Preferably, the stirring assembly includes a motor 4, a stirring shaft 5 and a stirring paddle 6; a mounting bracket 3 is provided above the kettle body 1; the motor 4 is mounted on the mounting bracket 3, one end of the stirring shaft 5 is coaxially connected to the rotating shaft of the motor 4, and the other end of the stirring shaft 5 extends into the kettle body 1 and is connected to the stirring paddle 6.

[0033] Specifically, the mounting frame 3 is arranged at the top center position of the kettle body 1, the motor 4 is fixedly installed on the mounting frame 3, the stirring shaft 5 extends into the kettle body 1 from the top center of the kettle body 1, and the stirring paddle 6 is located at the bottom of the kettle body 1.

[0034] Preferably, the frame includes a plurality of vertically arranged vertical poles 22, and a plurality of first cross bars 24 connecting adjacent vertical poles 22; the first cross bars 24 are connected to the lower part of the vertical poles 22, and the plurality of first cross bars 24 are located in the same horizontal plane; the number of the first cross bars 24 is the same as that of the vertical poles 22; a plurality of connecting parts 27 are provided on the side of the supporting part 26, and the connecting parts 27 correspond one-to-one to the first cross bars 24, and the connecting parts 27 are connected to the corresponding first cross bars 24.

[0035] Specifically, the number of the vertical rods 22 is at least three to ensure the stability of the frame. In this embodiment, the number of the vertical rods 22 and the number of the first crossbars 24 are both four. The connecting portions 27 are centrally symmetrically distributed around the supporting portion 26 and connected to the middle portion of the first crossbar 24. There are four connecting portions 27.

[0036] Preferably, a connecting groove is opened in the middle of the first cross bar 24 , and the connecting groove corresponds to the connecting portion 27 one by one, and the connecting portion 27 is embedded in the corresponding connecting groove.

[0037] Specifically, the connecting portion 27 is detachably connected to the first cross bar 24 ; after the connecting portion 27 is embedded in the connecting groove, the connecting portion 27 can be fixed to the first cross bar 24 by using bolts.

[0038] Preferably, the frame also includes multiple second cross bars 23 connecting adjacent vertical bars 22; the second cross bars 23 are connected to the upper part of the vertical bars 22, and multiple second cross bars 23 are located in the same horizontal plane; the number of the second cross bars 23 is the same as that of the vertical bars 22; the second cross bars 23 can abut the side wall of the kettle body 1.

[0039] The second cross bar 23 abuts against the side wall of the kettle body 1 to further fix the kettle body 1. Specifically, the kettle body 1 can be fixedly connected to the second cross bar 23 by bolts.

[0040] Preferably, the bracket 2 further includes a lifting cylinder 21; the number of the lifting cylinders 21 is consistent with the number of the vertical poles 22, and they correspond one to one; the telescopic end of the lifting cylinder 21 is connected to the bottom end of the corresponding vertical pole 22 to lift the frame.

[0041] The lifting cylinders 21 can lift the bracket 2, and further lift the kettle body 1. In this embodiment, the number of the lifting cylinders 21 is 4.

[0042] Preferably, the bracket 2 further includes a plurality of third cross bars 25 connecting adjacent lifting cylinders 21 ; the number of the third cross bars 25 is the same as the number of the lifting cylinders 21 ; and the plurality of third cross bars 25 are located in the same horizontal plane.

[0043] The third crossbar 25 is used to connect the lifting cylinders 21 to enhance the stability of the bracket 2. Specifically, the number of the third crossbars 25 is four.

[0044] Furthermore, a diagonal brace is connected to the middle of each third crossbar 25 to enhance the stability of the mixing kettle suitable for a sand mill. Specifically, the diagonal brace includes a first portion, a second portion, and a third portion; the first portion is vertically arranged, the third portion is horizontally arranged, one end of the second portion is diagonally connected to one end of the first portion, and the other end of the second portion is diagonally connected to one end of the third portion; bolts pass through the first portion and extend into the sidewalls of the third crossbar 25 to secure the diagonal brace to the third crossbar 25; the third portion is used to abut the ground.

[0045] Preferably, the bracket 2 further includes pulleys 7; the number of pulleys 7 is the same as the number of the lifting cylinders 21, and they correspond one to one; the pulleys 7 are connected to the ends of the corresponding lifting cylinders 21 away from the uprights 22; the pulleys 7 are universal wheels and are equipped with brakes. Specifically, the number of pulleys 7 is four.

[0046] Preferably, there are two argon inlets 14, which are respectively disposed on opposite sides of the upper portion of the kettle body 1; and two nitrogen inlets 16, which are respectively disposed on opposite sides of the lower portion of the kettle body 1. This facilitates rapid discharge of oxygen from the kettle body 1 and helps maintain an oxygen-free environment within the kettle body 1.

[0047] Preferably, a protective pad 231 is provided on one side of the second cross bar 23 for contacting the side wall of the kettle body 1 .

[0048] The protective pad 231 can increase the area of the second cross bar 23 abutting against the kettle body 1, which is beneficial to ensuring the stability of the kettle body 1 and can also effectively suppress the vibration of the kettle body 1. Specifically, the protective pad 231 can be a rubber pad.

[0049] Before the stirring kettle suitable for the sand mill is operated, argon and nitrogen are respectively introduced into the kettle body 1 through the argon inlet 14 and the nitrogen inlet 16, and the flow rates of argon and nitrogen entering the kettle body 1 are adjusted through the argon flow regulator 15 and the nitrogen flow regulator 17, so that the oxygen in the kettle body 1 is discharged from the observation window 11, the feed port 12 and the discharge port respectively, so that the oxygen content in the kettle body 1 meets the standard, and then the feed port 12 and the discharge port are respectively connected to the sand mill, the observation window 11 is kept open, and argon and nitrogen are continuously introduced into the kettle body 1. After observing that there is no abnormality in the material state through the observation window 11, the discharge valve 13 is opened to carry out the sand milling cycle.

[0050] The above are only preferred embodiments of the present invention and are not intended to limit the patent scope of the present invention. All equivalent structural transformations made based on the contents of the present invention specification and drawings, or direct / indirect applications in other related technical fields, are included in the patent protection scope of the present invention.

Claims

1. A stirring kettle suitable for a sand mill, characterized in that: The invention comprises a stirring assembly, a bracket (2), and a kettle body (1) arranged above the bracket (2); the stirring assembly is used to stir the material in the kettle body (1); the top of the kettle body (1) is provided with a feed port (12) for connecting to the discharge port of a sand mill, and an observation window (11) that can be opened and closed; the bottom of the kettle body (1) is provided with a discharge port for connecting to the feed port of the sand mill, and a discharge valve (13) arranged at the discharge port; the upper part of the kettle body (1) is provided with an argon gas inlet (14) and an argon gas flow regulator (15); the argon gas flow regulator (15) is used to regulate the argon gas introduced into the argon gas inlet (14); the kettle body ( 1) is provided with a nitrogen inlet (16) and a nitrogen flow regulator (17) at the lower part, and the nitrogen flow regulator (17) is used to regulate the nitrogen entering the nitrogen inlet (16); the bracket (2) includes a frame body and a supporting portion (26) for receiving the kettle body (1); the supporting portion (26) is connected to the frame body; the top surface of the supporting portion (26) is an arc-shaped surface, and the bottom of the arc-shaped surface is penetrated by a through hole (261); the bottom of the kettle body (1) can be in contact with the arc-shaped surface, and the bottom of the kettle body (1) can pass through the through hole (261), so that the discharge valve (13) is located below the supporting portion (26).

2. The stirred tank suitable for a sand mill according to claim 1, characterized in that: The stirring assembly comprises a motor (4), a stirring shaft (5) and a stirring paddle (6); a mounting frame (3) is provided above the kettle body (1); the motor (4) is mounted on the mounting frame (3); one end of the stirring shaft (5) is coaxially connected to the rotating shaft of the motor (4); the other end of the stirring shaft (5) extends into the kettle body (1) and is connected to the stirring paddle (6).

3. The stirred tank suitable for a sand mill according to claim 1, characterized in that: The frame includes a plurality of vertically arranged vertical poles (22) and a plurality of first cross bars (24) connecting adjacent vertical poles (22); the first cross bars (24) are connected to the lower part of the vertical poles (22), and the plurality of first cross bars (24) are located in the same horizontal plane; the number of the first cross bars (24) is the same as that of the vertical poles (22); a plurality of connecting parts (27) are provided on the side of the supporting part (26), the connecting parts (27) correspond one-to-one to the first cross bars (24), and the connecting parts (27) are connected to the corresponding first cross bars (24).

4. The stirred tank suitable for a sand mill according to claim 3, characterized in that: A connecting groove is provided in the middle of the first crossbar (24), the connecting groove corresponds to the connecting portion (27) one by one, and the connecting portion (27) is embedded in the corresponding connecting groove.

5. The stirred tank suitable for a sand mill according to claim 3, characterized in that: The frame body further comprises a plurality of second cross bars (23) connected to adjacent vertical bars (22); the second cross bars (23) are connected to the upper portion of the vertical bars (22), and the plurality of second cross bars (23) are located in the same horizontal plane; the number of the second cross bars (23) is the same as that of the vertical bars (22); and the second cross bars (23) can abut against the side wall of the kettle body (1).

6. The stirred kettle suitable for a sand mill according to claim 5, characterized in that: The bracket (2) further comprises a lifting cylinder (21); the number of the lifting cylinders (21) is the same as that of the vertical poles (22), and they correspond one to one; the telescopic end of the lifting cylinder (21) is connected to the bottom end of the corresponding vertical pole (22) to lift the bracket.

7. The stirred kettle suitable for a sand mill according to claim 6, characterized in that: The bracket (2) further comprises a plurality of third cross bars (25) connecting adjacent lifting cylinders (21); the number of the third cross bars (25) is the same as the number of the lifting cylinders (21); and the plurality of third cross bars (25) are located on the same horizontal plane.

8. The stirred kettle suitable for a sand mill according to claim 7, characterized in that: The bracket (2) further includes a pulley (7); the number of the pulleys (7) is the same as that of the lifting cylinders (21), and they correspond one to one; the pulley (7) is connected to the end of the corresponding lifting cylinder (21) away from the vertical rod (22); the pulley (7) is a universal wheel, and the pulley (7) is provided with a brake.

9. The stirred tank suitable for a sand mill according to claim 1, characterized in that: The number of the argon inlets (14) is two, and the two argon inlets (14) are respectively arranged on two opposite sides of the upper part of the kettle body (1); the number of the nitrogen inlets (16) is two, and the two nitrogen inlets (16) are respectively arranged on two opposite sides of the lower part of the kettle body (1).

10. The stirred kettle suitable for a sand mill according to claim 5, characterized in that: A protective pad (231) is provided on one side of the second crossbar (23) for contacting the side wall of the kettle body (1).

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