Preparation process of high-temperature-resistant anticorrosive paint

Abstract

The invention relates to a preparation process of a high-temperature-resistant anticorrosive coating applied to the technical field of high-temperature-resistant anticorrosive coatings. The preparation process comprises the following steps: S1, mixing and dispersing raw materials; s2, grinding and blending; s3, high-pressure and high-temperature treatment; s4, releasing pressure and discharging; the efficient sand mill comprises a machine body, a grinding intelligent controller installed on the machine body, a sand milling cylinder transversely fixed to one side of the machine body, a main shaft rotationally connected in the sand milling cylinder, and a grinding ball circulating mechanism; compared with traditional anti-corrosion paint, the anti-corrosion paint prepared through the method has higher heat preservation, heat insulation and temperature resistance, under the action of an efficient sand mill, the prepared dispersed suspension and grinding balls can be controlled to move relatively, the impact effect of the grinding balls on the dispersed suspension is improved, and the anti-corrosion performance of the anti-corrosion paint is improved. And the grinding balls can shear and grind the dispersed suspension more sufficiently, so that the grinding efficiency is improved, and grinding dead angles are reduced.

Description

Technical Field

[0001] The invention relates to a coating preparation process, in particular to a high-heat-resistant anti-corrosion coating preparation process applied to the technical field of high-heat-resistant anti-corrosion coatings. Background Art

[0002] Fluororesin coatings have good chemical resistance, non-stickiness, wear resistance and corrosion resistance, and are widely used in food machinery, anti-corrosion linings and other fields. They are widely used in anti-corrosion related industries due to their excellent chemical resistance, recoatability and certain temperature resistance.

[0003] The invention patent with the publication number CN118027756A discloses an ethylene-tetrafluoroethylene powder coating for anticorrosion lining and a preparation method thereof. The ethylene-tetrafluoroethylene powder coating for anticorrosion lining includes the following components by weight: 100 parts of ethylene-tetrafluoroethylene copolymer, 0.01-5 parts of heat stabilizer, 0.1-10 parts of flow aid, 0.5-5 parts of photoinitiator, 0-5 parts of pigment, and 0.5-3 parts of cross-linking agent. The ethylene-tetrafluoroethylene powder coating for anticorrosion lining prepared by the present invention by adding photoinitiator and cross-linking agent to ethylene-tetrafluoroethylene copolymer can improve the temperature resistance and wear resistance of the anticorrosion lining by UV curing cross-linking without affecting the molding of traditional powder coatings, thereby expanding the application prospects of ETFE powder coatings.

[0004] In the above technical scheme, the fluorine-containing resin coating has good acid and alkali resistance and anti-corrosion performance below 250°C. When the use environment exceeds this temperature range, its temperature resistance and anti-corrosion performance will decrease, resulting in its use environment being limited, which greatly affects its application scale. In addition, when preparing the coating, the prepared raw materials need to be input into a sand mill for grinding. During the grinding process, the grinding balls repeatedly impact the raw materials for shear grinding. The fluidity of the grinding balls in traditional sand mills is poor, resulting in low efficiency, which will also affect the performance of the prepared coating. Summary of the invention

[0005] In view of the above-mentioned prior art, the technical problem to be solved by the present invention is that the fluorine-containing resin coating has good acid and alkali resistance and anti-corrosion performance below 250°C. When the use environment exceeds this temperature range, its temperature resistance and anti-corrosion performance will decrease, resulting in its use environment being limited, which greatly affects its application scale. In addition, when preparing the coating, the prepared raw materials need to be input into a sand mill for grinding. During the grinding process, the grinding balls repeatedly hit the raw materials for shear grinding. The fluidity of the grinding balls in traditional sand mills is poor, resulting in low efficiency, which will also affect the performance of the prepared coating.

[0006] In order to solve the above problems, the present invention provides a preparation process of a high temperature resistant anticorrosive coating, comprising the following steps:

[0007] S1. Mixing and dispersing raw materials: adding nano-sized zirconium dioxide, nano-sized aluminum oxide, deionized water, a dispersant and a solvent to a dispersing device for dispersion to form a dispersed suspension;

[0008] S2. Grinding and blending: adding the dispersed suspension to a high-efficiency sand mill for grinding, removing bubbles by ultrasonic equipment during the grinding process, and adjusting the pH value of the dispersed suspension to 7.5-8.0 to form a thermal insulation slurry precursor;

[0009] S3, high pressure and high temperature treatment: transfer the thermal insulation slurry precursor to a high pressure container, set the temperature to 250°C-350°C, the pressure to 4MPa-6MPa, and continue stirring for 5-7 hours. After the fluorine-containing resin is fully dissolved in the solvent, gradually add it dropwise to the high pressure container, and continue stirring for another 1-2 hours;

[0010] S4, pressure relief and discharging: After the high-pressure container is depressurized to normal pressure, the raw materials are discharged, and the raw materials are cooled to room temperature and then stored to obtain a high temperature-resistant anticorrosive coating;

[0011] The high-efficiency sand mill includes: a machine body, a grinding intelligent controller installed on the machine body, a sand mill cylinder fixed horizontally on one side of the machine body, a main shaft connected to the sand mill cylinder for rotation, and a grinding ball circulation mechanism. A plurality of grinding balls are placed in the inner cavity of the sand mill cylinder, and a toggle mechanism is installed on the main shaft. The grinding ball circulation mechanism includes a separation chamber installed at one end of the sand mill cylinder and a transfer channel arranged in the separation chamber. The toggle mechanism is used to toggle the grinding balls along the inner cavity of the sand mill cylinder to the separation chamber. The transfer channel is fixed to the end of the sand mill cylinder, and the outer ring of the transfer channel is provided with a plurality of straight The through hole has a diameter larger than the diameter of the grinding ball, and two blocking slides are connected to the middle of the inner cavity of the separation chamber in a sliding manner on both sides, and a pressure sensor is installed in the blocking slide. A transfer box vertically slidably connected to the separation chamber is arranged below the blocking slide, and a transfer assembly is arranged at the bottom of the transfer box for transferring the transfer box to the end of the sand mill away from the separation chamber, and the bottom of the end of the sand mill away from the separation chamber is connected to a liquid circulation pipe, and the top of the end of the sand mill close to the separation chamber is connected to a liquid input pipe, and a circulation pump is installed at the connection between the liquid circulation pipe and the liquid input pipe;

[0012] A transfer module and a liquid circulation module are provided on the grinding intelligent controller. The transfer module is electrically connected to the pressure sensor and the transfer component respectively, and the liquid circulation module is electrically connected to the circulation pump.

[0013] In the preparation process of the above-mentioned high-temperature-resistant anti-corrosion coating, compared with traditional anti-corrosion coatings, the anti-corrosion coating prepared by the present invention has higher thermal insulation and temperature resistance, and under the action of a high-efficiency sand mill, the prepared dispersed suspension and grinding balls can be controlled to move relative to each other, thereby increasing the impact of the grinding balls on the dispersed suspension, allowing the grinding balls to more fully shear and grind the dispersed suspension, thereby improving grinding efficiency and reducing the generation of grinding dead angles.

[0014] As a further improvement of the present application, the weight of nano-scale zirconium dioxide and nano-scale aluminum oxide accounts for 20%-30% of the weight of the entire raw material.

[0015] As a further improvement of the present application, inclined separation screens are installed on both sides of the inner cavity of the separation chamber, and a number of through holes with a diameter smaller than the diameter of the grinding balls are opened on the separation screens. A separation channel is formed between the separation screens and the inner wall of the separation chamber, and the separation channel is connected to the liquid circulation pipe through a reflux pipe.

[0016] As a further improvement of the present application, a feed pipe is installed on the sanding cylinder, the input end of the liquid input pipe is connected to the discharge pipe through a multi-way pipe, a discharge solenoid valve is installed on the discharge pipe, a reflux solenoid valve is installed on the liquid input pipe, and the liquid circulation module is electrically connected to the reflux solenoid valve and the discharge solenoid valve respectively.

[0017] As another improvement of the present application, a flushing pipe is connected to the top of the inner cavity of the separation chamber, and a flushing solenoid valve 2 is installed on the flushing pipe. The top input end of the flushing pipe is connected to a flushing tank, which is connected to the multi-way pipe at the input end of the liquid input pipe through a pipeline. A flushing solenoid valve 1 is installed on the pipeline on the flushing tank, and an air pressure sensor is installed in the inner cavity of the flushing tank. An auxiliary flushing module is also provided on the grinding intelligent controller, and the auxiliary flushing module is electrically connected to the transfer module, flushing solenoid valve 1, flushing solenoid valve 2 and the air pressure sensor, respectively.

[0018] As another improvement supplement of the present application, a baffle is installed between the inner cavity of the sand mill and the separation chamber, a connecting hole is opened at the upper end of the baffle corresponding to the inner cavity of the transfer channel, the main shaft passes through the baffle, the toggle mechanism includes a plurality of partition plates evenly fixed along the axial direction of the main shaft, and an inclined toggle rod installed between adjacent partition plates, the rotating toggle rod gradually pushes the grinding balls to one side of the separation chamber, and the partition plate has a plurality of connecting holes along its circumference.

[0019] As another improved supplement of the present application, the bottom of the transfer box is vertically slidably connected to a movable bottom plate, electromagnets are installed at both ends of the bottom of the transfer box, magnets are installed in the middle and both ends of the movable bottom plate, and the transfer module is electrically connected to electromagnet one.

[0020] As another improvement of the present application, the transfer assembly includes a transfer trough matching the transfer box, a transfer plate arranged under the transfer trough, a transfer screw threadedly connected to the transfer plate, a driving member is installed on the end of the transfer screw, and an electromagnet 2 matching the magnet in the middle of the movable bottom plate is installed on the transfer plate, and the transfer module is electrically connected to the driving member and the electromagnet 2, respectively.

[0021] As a further improvement of the present application, two blocking slides 2 are horizontally slidably connected to the sanding cylinder and the transfer trough at the corresponding end away from the separation chamber. The bottom surfaces of the blocking slide 2 and the blocking slide 1 are both inclined surfaces, and return springs are installed on the outer sides of the blocking slide 2 and the blocking slide 1.

[0022] In summary, the coating in the technical solution is an inorganic coating that can withstand 1000°C. Compared with traditional coatings, it has the characteristics of thermal insulation, and the thermal conductivity at 1000°C is <0.1W / (m·K); and it is an acid- and alkali-resistant coating that can withstand 400°C. Compared with traditional anti-corrosion coatings, it has higher temperature resistance; compared with traditional anti-corrosion coatings, its temperature resistance is increased from 250°C to 400°C, and the traditional thermal insulation mortar has a temperature resistance of about 600-800°C. The coating of the present application has a relatively high temperature resistance; in addition, the coating of the present application has excellent thermal insulation performance. The thermal conductivity of traditional refractory coatings or ceramic coatings at 1000°C is basically above 1W / (m·K), which only achieves high temperature resistance, and the thermal insulation performance is relatively poor;

[0023] The grinding balls located in the inner cavity of the sand mill are controlled to move from the end far from the separation chamber toward the end close to the separation chamber, thereby reducing the dead angle in the inner cavity of the sand mill. The dispersed suspension in the sand mill is synchronously controlled to move from the end close to the separation chamber toward the end far from the separation chamber, which is opposite to the movement direction of the grinding balls in the inner cavity of the sand mill. The two are controlled to move relative to each other, thereby increasing the impact of the grinding balls on the dispersed suspension. The grinding balls can more fully shear and grind the dispersed suspension, thereby improving the grinding efficiency and reducing the generation of grinding dead angles. BRIEF DESCRIPTION OF THE DRAWINGS

[0024] Figure 1 This is a preparation process flow chart of the first and second embodiments of the present application;

[0025] Figure 2 This is an overall schematic diagram of a high-efficiency sand mill according to the first and second embodiments of the present application;

[0026] Figure 3 Another overall schematic diagram of the high-efficiency sand mill according to the first and second embodiments of the present application from another perspective;

[0027] Figure 4 This is a control principle block diagram of the grinding intelligent controller of the first embodiment of the present application;

[0028] Figure 5 This is a schematic diagram of the internal structure of the separation chamber of the first and second embodiments of the present application;

[0029] Figure 6 This is a schematic diagram of the structure after the transfer box in the separation chamber is moved upward in the first and second embodiments of the present application;

[0030] Figure 7 This is a schematic diagram of the transfer box and transfer slot structure of the first and second embodiments of the present application;

[0031] Figure 8 Schematic diagram of the interior of the sanding barrel of the first and second embodiments of the present application;

[0032] Fig. 9 Schematic diagram of the position of the baffle plate in the sanding barrel of the first and second embodiments of the present application;

[0033] Fig.10 Schematic cross-sectional view of the transport box of the first and second embodiments of the present application;

[0034] Fig.11 Schematic diagram of the two positions of the sanding barrel and the blocking slide plate of the first and second embodiments of the present application;

[0035] Fig.12 This is a control principle block diagram of the grinding intelligent controller of the second embodiment of the present application.

[0036] Description of the numbers in the figure:

[0037] 1. Grinding intelligent controller; 2. Sanding cylinder; 3. Feed pipe; 4. Grinding ball circulation mechanism; 5. Liquid circulation pipe; 6. Discharge pipe; 7. Circulation pump; 8. Reflux pipe; 9. Flushing tank; 10. Flushing pipe; 11. Liquid input pipe; 12. Flushing solenoid valve 1; 13. Reflux solenoid valve; 14. Flushing solenoid valve 2; 15. Discharge solenoid valve; 16. Spindle; 17. Spacer; 18. Toggle lever; 19. Baffle plate; 20. Separation chamber; 21. Transfer channel; 22. Separation mesh plate; 23. Separation channel; 24. Blocking slide 1; 25. Transfer box; 26. Movable bottom plate; 27. Transfer plate; 28. Transfer screw; 29. ​​Transfer trough; 30. Blocking slide 2; 31. Electromagnet 1. DETAILED DESCRIPTION

[0038] Two implementation modes of the present application are described in detail below with reference to the accompanying drawings.

[0039] The first implementation method:

[0040] Figure 1 A preparation process of a high temperature resistant anticorrosive coating is shown, comprising the following steps:

[0041] S1. Mixing and dispersing raw materials: adding nano-zirconium dioxide, nano-aluminum oxide, deionized water, a dispersant and a solvent to a dispersing device for dispersion to form a dispersed suspension, wherein the weight of nano-zirconium dioxide and nano-aluminum oxide accounts for 20%-30% of the weight of the whole raw materials;

[0042] S2. Grinding and blending: adding the dispersed suspension to a high-efficiency sand mill for grinding, removing bubbles by ultrasonic equipment during the grinding process, and adjusting the pH value of the dispersed suspension to 7.5-8.0 to form a thermal insulation slurry precursor;

[0043] S3, high pressure and high temperature treatment: transfer the thermal insulation slurry precursor to a high pressure container, set the temperature to 250°C-350°C, the pressure to 4MPa-6MPa, and continue stirring for 5-7 hours. After the fluorine-containing resin is fully dissolved in the solvent, gradually add it dropwise to the high pressure container, and continue stirring for another 1-2 hours;

[0044] S4, pressure relief and discharging: After the high-pressure container is depressurized to normal pressure, the raw materials are discharged, and the raw materials are cooled to room temperature and then stored to obtain a high-temperature resistant anticorrosive coating.

[0045] The high-temperature-resistant anti-corrosion coating prepared by the above process, combined with the product inspection report below, can be seen that the coating in the present technical scheme is an inorganic coating that can withstand 1000°C. Compared with traditional coatings, it has the characteristics of thermal insulation, and its thermal conductivity at 1000°C is <0.1W / (m·K); and it is an acid- and alkali-resistant coating that can withstand 400°C. Compared with traditional anti-corrosion coatings, it has higher temperature resistance; compared with traditional anti-corrosion coatings, its temperature resistance is increased from 250°C to 400°C, and the traditional thermal insulation mortar has a temperature resistance of about 600-800°C. The coating of the present application has a relatively high temperature resistance; in addition, the coating of the present application has excellent thermal insulation performance. The thermal conductivity of traditional refractory coatings or ceramic coatings at 1000°C is basically above 1W / (m·K), and they only achieve high temperature resistance, and their thermal insulation performance is relatively poor.

[0046] The table below is the product inspection report

[0047]

[0048]

[0049] It is worth mentioning that see Figure 2-Figure 9The high-efficiency sand mill includes: a machine body, a grinding intelligent controller 1 installed on the machine body, a sand mill 2 fixed laterally on one side of the machine body, a main shaft 16 connected and rotatably in the sand mill 2, and a grinding ball circulation mechanism 4. A plurality of grinding balls are placed in the inner cavity of the sand mill 2, and a toggle mechanism is installed on the main shaft 16. When the dispersed suspension is added to the sand mill 2, the toggle mechanism is driven to rotate by the rotating main shaft 16, and the grinding balls are toggled to shear and grind the dispersed suspension. In the grinding process, the grinding balls are orderly toggled toward one end of the sand mill 2, which is convenient for collecting and transporting the grinding balls and reducing the problem of the grinding balls accumulating in dead corners during the grinding process in the inner cavity of the sand mill 2.

[0050] Also, see Figure 4-Figure 5The grinding ball circulation mechanism 4 includes a separation chamber 20 installed at one end of the sand mill 2 and a transfer channel 21 arranged in the separation chamber 20. The shifting mechanism is used to shift the grinding balls along the inner cavity of the sand mill 2 to the separation chamber 20. The transfer channel 21 is fixed to the end of the sand mill 2. The outer ring of the transfer channel 21 is provided with a plurality of through holes with a diameter larger than the diameter of the grinding balls. In the process of shearing and grinding the dispersed suspension by the grinding balls, the grinding balls gradually move toward one end of the separation chamber 20 and enter the transfer channel 21. The sand mill 2 drives the transfer channel 21 to rotate. The centrifugal force generated by the transfer channel 21 moves the grinding balls from the upper surface of the transfer channel 21. The grinding balls thrown into the inner cavity of the separation chamber 20 are thrown out through the through hole and thrown out into the inner cavity of the separation chamber 20. Two blocking slides 24 are connected to the middle of the inner cavity of the separation chamber 20 to slide to both sides. A pressure sensor is installed in the blocking slide 24. The grinding balls thrown into the inner cavity of the separation chamber 20 gradually fall and accumulate on the blocking slide 24. The number of grinding balls accumulated on the top of the blocking slide 24 can be known in real time through the pressure sensor. A transfer box 25 vertically slidably connected to the separation chamber 20 is arranged below the blocking slide 24. A transfer component is arranged at the bottom of the transfer box 25 for transferring the transfer box 25 to the end of the sand mill 2 away from the separation chamber 20. The grinding balls on the top of the blocking slide 24 are When a certain amount of the particles are accumulated, the blocking slide 24 is pushed open to both sides by controlling the transfer box 25 to move upward, and the grinding balls on the blocking slide 24 fall into the inner cavity of the transfer box 25. After the transfer box 25 is reset, the transfer assembly is controlled to move it to the other end of the sand mill 2, so that the grinding balls can circulate and move, and the grinding balls located in the inner cavity of the sand mill 2 move from the end away from the separation chamber 20 to the end close to the separation chamber 20, reducing the dead angle in the inner cavity of the sand mill 2, so that it can better shear and grind the dispersed suspension. The bottom of the end of the sand mill 2 away from the separation chamber 20 is connected to a liquid circulation pipe 5, and the end of the sand mill 2 close to the separation chamber 20 is connected to the liquid circulation pipe 5. The top of the end is connected to a liquid input pipe 11, and a circulation pump 7 is installed at the connection between the liquid circulation pipe 5 and the liquid input pipe 11. When the grinding balls are circulated, the circulation pump 7 is started to control the dispersed suspension to be transported to the liquid input pipe 11 through the liquid circulation pipe 5. At this time, the dispersed suspension in the sand mill 2 moves from the end close to the separation chamber 20 to the end away from the separation chamber 20, which is opposite to the movement direction of the grinding balls in the inner cavity of the sand mill 2. The two are controlled to move relative to each other, increasing the impact of the grinding balls on the dispersed suspension, so that the grinding balls can more fully shear and grind the dispersed suspension, thereby improving the grinding efficiency and reducing the generation of grinding dead angles.

[0051] In this embodiment, a transfer module and a liquid circulation module are provided on the grinding intelligent controller 1. The transfer module is electrically connected to the pressure sensor and the transfer component respectively, and the liquid circulation module is electrically connected to the circulation pump 7. When the dispersed suspension is ground by the high-efficiency sand mill, the grinding balls are gradually transferred to the separation chamber 20 by the toggle mechanism rotating with the main shaft 16. During the transfer process, the dispersed suspension is continuously sheared and ground. The grinding balls are thrown into the inner cavity of the separation chamber 20 by the centrifugal action of the transfer channel 21 and are concentrated on the blocking slide 24. The detected pressure data is sent to the transfer module through the pressure sensor. The transfer module determines the number of grinding balls on the blocking slide 24. When the number reaches a preset value (the number of grinding balls that need to be transferred is preset in the transfer module), The transfer module controls the operation of the transfer assembly, the transfer box 25 moves up to push open the blocking slide plate 24, and the grinding balls fall into the transfer box 25, and the transfer box 25 carrying the grinding balls is transferred to the end of the sand mill 2 away from the separation chamber 20, so as to achieve the purpose of circulating the grinding balls from the inner cavity of the sand mill 2 to the separation chamber 20. At the same time, the liquid circulation module controls the operation of the circulation pump 7, and the circulation pump 7 transfers the dispersed suspension located at the end of the sand mill 2 away from the separation chamber 20 to the other end, so that the dispersed suspension moves from one end of the separation chamber 20 to the other end in the inner cavity of the sand mill 2, and controls the relative movement between the two, thereby increasing the impact of the grinding balls on the dispersed suspension, enabling the grinding balls to more fully shear and grind the dispersed suspension, thereby improving the grinding efficiency and reducing the generation of grinding dead angles.

[0052] In this embodiment, inclined separation mesh plates 22 are installed on both sides of the inner cavity of the separation chamber 20. The separation mesh plates 22 are provided with a plurality of through holes with a diameter smaller than that of the grinding balls. A separation channel 23 is formed between the separation mesh plates 22 and the inner wall of the separation chamber 20. The separation channel 23 is connected to the liquid circulation pipe 5 through the reflux pipe 8. When the grinding balls are centrifugally thrown to the inner wall of the separation chamber 20 through the transfer channel 21, the grinding balls can better fall along the inclined separation mesh plates 22 and fall on the blocking slide plate 24 at the bottom. The inclined separation mesh plates 22 can form the separation channel 23 and separate the grinding balls and the dispersed suspension. When the circulation pump 7 is working, the dispersed suspension in the separation channel 23 is extracted through the reflux pipe 8 and discharged into the inner cavity of the sand mill 2 through the liquid input pipe 11.

[0053] In addition, a feed pipe 3 is installed on the sand mill 2, and the input end of the liquid input pipe 11 is connected to the discharge pipe 6 through a multi-way pipe. A discharge solenoid valve 15 is installed on the discharge pipe 6, and a reflux solenoid valve 13 is installed on the liquid input pipe 11. The liquid circulation module is electrically connected to the reflux solenoid valve 13 and the discharge solenoid valve 15 respectively. The dispersed suspension is put into the sand mill 2 through the feed pipe 3 for feeding, and when discharge is required, the reflux solenoid valve 13 is controlled to be closed and the discharge solenoid valve 15 is opened through the liquid circulation module. The circulation pump 7 works to extract the dispersed suspension located in the inner cavity of the sand mill 2 and the inner cavity of the separation chamber 20, and discharge it through the discharge pipe 6, which is convenient for feeding and discharging operations.

[0054] See also Figure 8 and Fig. 9 A baffle 19 is installed between the inner cavity of the sand mill 2 and the separation chamber 20. A communicating hole is opened at the upper end of the baffle 19 and at the position corresponding to the inner cavity of the transfer channel 21, so that the dispersed suspension in the inner cavity of the sand mill 2 can be blocked to a certain extent, and the dispersed suspension discharged through the liquid input pipe 11 is reduced from entering the separation chamber 20, so that the dispersed suspension in the inner cavity of the sand mill 2 can flow in an orderly manner, and the lower end of the baffle 19 can block the grinding balls to a certain extent, and the blocked grinding balls will collide with the dispersed suspension to shear and grind the dispersed suspension. The main shaft 16 passes through the baffle 19, and the toggle mechanism includes a uniformly fixed portion along the axial direction of the main shaft 16. A plurality of fixed partition plates 17 and an inclined toggle rod 18 installed between adjacent partition plates 17, the rotating toggle rod 18 gradually toggles the grinding balls toward the side of the separation chamber 20, the partition plates 17 are provided with a plurality of connecting holes along their circumference, and the inner cavity of the sand mill 2 is divided into a plurality of interconnected spaces by the plurality of partition plates 17, the grinding balls are moved by the toggle rod 18, the dispersed suspension in each space is sheared and ground, and under the action of the unidirectional toggle of the toggle rod 18, the grinding balls can be gradually toggled toward the side of the separation chamber 20, and the dispersed suspension can also flow in the reverse direction through the connecting holes on the partition plates 17, so that the two can each move smoothly in opposite directions.

[0055] The second implementation method:

[0056] Figure 5-Figure 12The preparation process of a high-temperature-resistant anti-corrosion coating is shown. Different from the first embodiment, the top of the inner cavity of the separation chamber 20 in the high-efficiency sand mill is connected with a flushing pipe 10, and a flushing solenoid valve 14 is installed on the flushing pipe 10. The top input end of the flushing pipe 10 is connected to a flushing tank 9, and the flushing tank 9 is connected to the multi-way pipe at the input end of the liquid input pipe 11 through a pipeline. A flushing solenoid valve 12 is installed on the pipeline on the flushing tank 9, and an air pressure sensor is installed in the inner cavity of the flushing tank 9. An auxiliary flushing module is also provided on the grinding intelligent controller 1, and the auxiliary flushing modules are respectively It is electrically connected to the transfer module, flushing solenoid valve 12, flushing solenoid valve 2 14 and the air pressure sensor. When the grinding balls inside the transfer channel 21 are thrown to the inner wall of the separation chamber 20 through the centrifugal action, in order to reduce the number of grinding balls adhering to the inner wall of the separation chamber 20 and improve the utilization rate of the grinding balls, a sufficient amount of dispersed suspension is collected through the flushing tank 9, and the high-pressure dispersed suspension is discharged through the flushing pipe 10, and the grinding balls located on the inner wall of the separation chamber 20 are flushed to the blocking slide 24 at the bottom, so as to facilitate centralized transportation through the transfer box 25 and improve the utilization rate of the grinding balls.

[0057] In addition, the auxiliary flushing module controls the flushing solenoid valve 12 to open and the flushing solenoid valve 2 14 to close, guides the dispersed suspension into the flushing tank 9, and determines the pressure value of the dispersed suspension in the flushing tank 9 through the air pressure sensor. When the preset value is reached (the auxiliary flushing module has a preset qualified pressure value of the flushing tank 9), the flushing solenoid valve 12 is controlled to be closed. When the transfer module determines through the pressure sensor that the number of grinding balls on the blocking slide 24 reaches the preset value, it sends a flushing signal to the auxiliary flushing module. The auxiliary flushing module controls the flushing solenoid valve 2 14 to open for a preset time, and quickly flushes the high-pressure dispersed suspension into the inner cavity of the separation chamber 20 through the liquid input pipe 11 to flush the inner wall of the separation chamber 20. After the auxiliary flushing module controls the flushing solenoid valve 2 14 to close, it sends a flushing completion signal to the transfer module, and the transfer module controls the transfer of the grinding balls to the other end of the sand mill 2.

[0058] It is worth mentioning that see Fig.10 The bottom of the transfer box 25 is vertically slidably connected with a movable bottom plate 26, and electromagnets 31 are installed at both ends of the bottom of the transfer box 25. Magnets are installed in the middle and both ends of the movable bottom plate 26. The transfer module is electrically connected to the electromagnet 31. At this time, the electromagnet 31 is controlled to be energized to magnetically attract the magnets at both ends of the movable bottom plate 26, thereby restricting the movable bottom plate 26 to the bottom of the transfer box 25, and by cutting off the power to the electromagnet 31, the restriction on the movable bottom plate 26 is released, and the movable bottom plate 26 can be controlled to move up and down in the frame of the transfer box 25, which is convenient for transporting the grinding balls, and the inner cavity of the transfer box 25 is provided with a limit block that limits the up and down movement range of the movable bottom plate 26 to prevent the movable bottom plate 26 from detaching from the inner frame of the transfer box 25.

[0059] In this implementation, see Figure 5-Figure 7 and Fig.11 The transfer assembly includes a transfer trough 29 matching the transfer box 25, a transfer plate 27 arranged below the transfer trough 29, and a transfer screw 28 threadedly connected to the transfer plate 27. A driving member is installed at the end of the transfer screw 28. An electromagnet 2 matching the magnet in the middle of the movable bottom plate 26 is installed on the transfer plate 27. The transfer module is electrically connected to the driving member and the electromagnet 2 respectively. When it is necessary to transfer the grinding balls located in the inner cavity of the separation chamber 20 to the other end of the sand mill 2, the electromagnet 2 on the transfer plate 27 is controlled to generate the same magnetism as the magnet in the middle of the movable bottom plate 26. The transfer box 25 and the movable bottom plate 26 are pushed up by the action of magnetic repulsion, and the blocking slide plate 24 is pushed open, and the grinding balls fall into the transfer box 25. Then the electromagnet 2 is controlled to generate the opposite magnetism to the magnet in the middle of the movable bottom plate 26. The transfer box 25 and the movable bottom plate 26 are moved down and adsorbed by the action of magnetic attraction, and then the transfer box 25 and the movable bottom plate 26 are moved down and adsorbed by the action of magnetic attraction. The transfer screw 28 is driven to rotate by controlling the driving part, and the transfer plate 27 is moved to the other end of the sand mill 2, and the transfer box 25 is moved synchronously by magnetic attraction. In the process of moving along the transfer groove 29 to the other end of the sand mill 2, since the transfer plate 27 and the transfer box 25 are driven non-contactly and move in the closed transfer groove 29, the dispersed suspension and the grinding balls are not easily lost. After moving to the other end of the sand mill 2, the electromagnet 2 on the transfer plate 27 is controlled to produce the same magnetism as the magnet in the middle of the movable bottom plate 26, the transfer box 25 and the movable bottom plate 26 are pushed up and the sealing slide plate 2 30 is opened. At the same time, the power of the electromagnet 2 is increased and the control electromagnet 1 31 is powered off. At this time, the movable bottom plate 26 moves up without restriction, so that the grinding balls are better pushed into the inner cavity of the sand mill 2, and the disturbed dispersed suspension is transferred to the inner cavity of the sand mill 2, so as to realize the transfer of the grinding balls.

[0060] In addition, two blocking slides 2 30 are horizontally slidably connected to the sanding cylinder 2 and the transfer trough 29 at the corresponding end away from the separation chamber 20. The bottom surfaces of the blocking slide 2 30 and the blocking slide 1 24 are both inclined surfaces. During the upward movement of the transfer box 25, the corresponding blocking slide 2 30 or the blocking slide 1 24 can be pushed to slide to both sides. Reset springs are installed on the outer sides of the blocking slide 2 30 and the blocking slide 1 24. When the transfer box 25 moves down and resets, the corresponding blocking slide 2 30 and the blocking slide 1 24 are pushed to reset again by the action of the reset springs.

[0061] In view of current practical needs, the above-mentioned implementation mode adopted in this application is not limited to the scope of protection. Various changes made within the knowledge scope of technical personnel in this field without departing from the concept of this application still fall within the scope of protection of the present invention.

Claims

1. A preparation process of a high temperature resistant anticorrosive coating, characterized in that: The following steps are involved: S1. Mixing and dispersing raw materials: adding nano-sized zirconium dioxide, nano-sized aluminum oxide, deionized water, a dispersant and a solvent to a dispersing device for dispersion to form a dispersed suspension; S2. Grinding and blending: adding the dispersed suspension to a high-efficiency sand mill for grinding, removing bubbles by ultrasonic equipment during the grinding process, and adjusting the pH value of the dispersed suspension to 7.5-8.0 to form a thermal insulation slurry precursor; S3, high pressure and high temperature treatment: transfer the thermal insulation slurry precursor to a high pressure container, set the temperature to 250°C-350°C, the pressure to 4MPa-6MPa, and continue stirring for 5-7 hours. After the fluorine-containing resin is fully dissolved in the solvent, gradually add it dropwise to the high pressure container, and continue stirring for another 1-2 hours; S4, pressure relief and discharging: After the high-pressure container is depressurized to normal pressure, the raw materials are discharged, and the raw materials are cooled to room temperature and then stored to obtain a high temperature-resistant anticorrosive coating; The high-efficiency sand mill comprises: a machine body, a grinding intelligent controller (1) installed on the machine body, a sand mill cylinder (2) fixed transversely on one side of the machine body, a main shaft (16) rotatably connected in the sand mill cylinder (2), and a grinding ball circulation mechanism (4), wherein a plurality of grinding balls are placed in the inner cavity of the sand mill cylinder (2), a shifting mechanism is installed on the main shaft (16), and the grinding ball circulation mechanism (4) comprises a separation chamber (20) installed at one end of the sand mill cylinder (2) and a transfer channel (21) arranged in the separation chamber (20), wherein the shifting mechanism is used to shift the grinding balls along the inner cavity of the sand mill cylinder (2) to the separation chamber (20), the transfer channel (21) is fixed to the end of the sand mill cylinder (2), and the outer ring of the transfer channel (21) is provided with a plurality of holes having a diameter larger than the diameter of the grinding balls. The separation chamber (20) has a through hole with a diameter of 1.5 mm, and the middle of the inner cavity of the separation chamber (20) is slidably connected to two blocking slides (24) on both sides, and a pressure sensor is installed in the blocking slide (24). A transfer box (25) is arranged below the blocking slide (24) and is vertically slidably connected to the separation chamber (20). A transfer assembly is arranged at the bottom of the transfer box (25) for transferring the transfer box (25) to the end of the sand mill (2) away from the separation chamber (20). The bottom of the end of the sand mill (2) away from the separation chamber (20) is connected to a liquid circulation pipe (5), and the top of the end of the sand mill (2) close to the separation chamber (20) is connected to a liquid input pipe (11), and a circulation pump (7) is installed at the connection between the liquid circulation pipe (5) and the liquid input pipe (11); The grinding intelligent controller (1) is provided with a transfer module and a liquid circulation module, the transfer module is electrically connected to the pressure sensor and the transfer component respectively, and the liquid circulation module is electrically connected to the circulation pump (7).

2. The preparation process of a high temperature resistant anticorrosive coating according to claim 1, characterized in that: The weight of the nano-scale zirconium dioxide and nano-scale aluminum oxide accounts for 20%-30% of the weight of the entire raw material.

3. The preparation process of a high temperature resistant anticorrosive coating according to claim 1, characterized in that: Inclined separation screens (22) are installed on both sides of the inner cavity of the separation chamber (20), and a plurality of through holes with a diameter smaller than the diameter of the grinding balls are opened on the separation screens (22). A separation channel (23) is formed between the separation screens (22) and the inner wall of the separation chamber (20), and the separation channel (23) is connected to the liquid circulation pipe (5) through a reflux pipe (8).

4. The preparation process of a high temperature resistant anticorrosive coating according to claim 1, characterized in that: The sand mill cylinder (2) is provided with a feed pipe (3), the input end of the liquid input pipe (11) is connected to a discharge pipe (6) via a multi-way pipe, a discharge solenoid valve (15) is provided on the discharge pipe (6), a reflux solenoid valve (13) is provided on the liquid input pipe (11), and the liquid circulation module is electrically connected to the reflux solenoid valve (13) and the discharge solenoid valve (15), respectively.

5. The preparation process of a high temperature resistant anticorrosive coating according to claim 1, characterized in that: The top of the inner cavity of the separation chamber (20) is connected to a flushing pipe (10), and a flushing solenoid valve 2 (14) is installed on the flushing pipe (10). The top input end of the flushing pipe (10) is connected to a flushing tank (9), and the flushing tank (9) is connected to a multi-way pipe at the input end of the liquid input pipe (11) through a pipeline. A flushing solenoid valve 1 (12) is installed on the pipeline on the flushing tank (9), and an air pressure sensor is installed in the inner cavity of the flushing tank (9). The grinding intelligent controller (1) is also provided with an auxiliary flushing module, and the auxiliary flushing module is electrically connected to the transfer module, the flushing solenoid valve 1 (12), the flushing solenoid valve 2 (14) and the air pressure sensor respectively.

6. The preparation process of a high temperature resistant anticorrosive coating according to claim 5, characterized in that: A baffle (19) is installed between the inner cavity of the sand mill cylinder (2) and the separation chamber (20), and a connecting hole is opened at the upper end of the baffle (19) corresponding to the inner cavity of the transfer channel (21). The main shaft (16) passes through the baffle (19). The shifting mechanism includes a plurality of partition plates (17) uniformly fixed along the axial direction of the main shaft (16) and an inclined shifting rod (18) installed between adjacent partition plates (17). The rotating shifting rod (18) gradually shifts the grinding balls to one side of the separation chamber (20), and the partition plates (17) are provided with a plurality of connecting holes along their circumference.

7. The preparation process of a high temperature resistant anticorrosive coating according to claim 1, characterized in that: The bottom of the transfer box (25) is vertically slidably connected to a movable bottom plate (26), and electromagnets (31) are installed at both ends of the bottom of the transfer box (25). Magnets are installed in the middle and at both ends of the movable bottom plate (26), and the transfer module is electrically connected to electromagnet (31).

8. The process for preparing a high temperature resistant anticorrosive coating according to claim 7, characterized in that: The transfer assembly includes a transfer trough (29) matching the transfer box (25), a transfer plate (27) arranged below the transfer trough (29), and a transfer screw (28) threadedly connected to the transfer plate (27). A driving member is installed at the end of the transfer screw (28). An electromagnet 2 matching the magnet in the middle of the movable bottom plate (26) is installed on the transfer plate (27). The transfer module is electrically connected to the driving member and the electromagnet 2, respectively.

9. The preparation process of a high temperature resistant anticorrosive coating according to claim 8, characterized in that: The sand mill cylinder (2) and the transfer trough (29) are horizontally slidably connected with two blocking slide plates (30) at the corresponding ends away from the separation chamber (20). The bottom surfaces of the blocking slide plate (30) and the blocking slide plate (24) are both inclined surfaces, and the outer sides of the blocking slide plate (30) and the blocking slide plate (24) are both installed with return springs.

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