CN113513884A - High-activity metal powder anti-oxidation drying device and drying method - Google Patents
High-activity metal powder anti-oxidation drying device and drying method Download PDFInfo
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- CN113513884A CN113513884A CN202110453480.7A CN202110453480A CN113513884A CN 113513884 A CN113513884 A CN 113513884A CN 202110453480 A CN202110453480 A CN 202110453480A CN 113513884 A CN113513884 A CN 113513884A
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F26—DRYING
- F26B—DRYING SOLID MATERIALS OR OBJECTS BY REMOVING LIQUID THEREFROM
- F26B9/00—Machines or apparatus for drying solid materials or objects at rest or with only local agitation; Domestic airing cupboards
- F26B9/06—Machines or apparatus for drying solid materials or objects at rest or with only local agitation; Domestic airing cupboards in stationary drums or chambers
- F26B9/066—Machines or apparatus for drying solid materials or objects at rest or with only local agitation; Domestic airing cupboards in stationary drums or chambers the products to be dried being disposed on one or more containers, which may have at least partly gas-previous walls, e.g. trays or shelves in a stack
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F26—DRYING
- F26B—DRYING SOLID MATERIALS OR OBJECTS BY REMOVING LIQUID THEREFROM
- F26B21/00—Arrangements or duct systems, e.g. in combination with pallet boxes, for supplying and controlling air or gases for drying solid materials or objects
- F26B21/14—Arrangements or duct systems, e.g. in combination with pallet boxes, for supplying and controlling air or gases for drying solid materials or objects using gases or vapours other than air or steam, e.g. inert gases
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F26—DRYING
- F26B—DRYING SOLID MATERIALS OR OBJECTS BY REMOVING LIQUID THEREFROM
- F26B25/00—Details of general application not covered by group F26B21/00 or F26B23/00
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F26—DRYING
- F26B—DRYING SOLID MATERIALS OR OBJECTS BY REMOVING LIQUID THEREFROM
- F26B25/00—Details of general application not covered by group F26B21/00 or F26B23/00
- F26B25/005—Treatment of dryer exhaust gases
- F26B25/006—Separating volatiles, e.g. recovering solvents from dryer exhaust gases
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F26—DRYING
- F26B—DRYING SOLID MATERIALS OR OBJECTS BY REMOVING LIQUID THEREFROM
- F26B25/00—Details of general application not covered by group F26B21/00 or F26B23/00
- F26B25/06—Chambers, containers, or receptacles
- F26B25/14—Chambers, containers, receptacles of simple construction
- F26B25/18—Chambers, containers, receptacles of simple construction mainly open, e.g. dish, tray, pan, rack
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F26—DRYING
- F26B—DRYING SOLID MATERIALS OR OBJECTS BY REMOVING LIQUID THEREFROM
- F26B5/00—Drying solid materials or objects by processes not involving the application of heat
- F26B5/04—Drying solid materials or objects by processes not involving the application of heat by evaporation or sublimation of moisture under reduced pressure, e.g. in a vacuum
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Abstract
The application relates to the technical field of metal powder drying, and provides a high-activity metal powder anti-oxidation drying device and a drying method, wherein the drying device comprises: the device comprises a drying box, an inert gas supply assembly, a vacuumizing assembly and a liquid level monitoring assembly; the drying oven is internally provided with a heater, a material tray, a thermometer and a vacuum gauge, the inert gas supply assembly is used for filling inert gas into the drying oven, the vacuum assembly is used for vacuumizing the drying oven, and the liquid level monitoring assembly is used for collecting absolute ethyl alcohol and monitoring the liquid level height change of the absolute ethyl alcohol. The inert gas supply assembly and the vacuumizing assembly are matched with each other, so that the high-activity metal powder can be prevented from being oxidized due to residual oxygen; the heater and the thermometer are used for realizing constant temperature heating and shortening drying time; can collect and monitor the liquid level height to absolute ethyl alcohol through liquid level monitoring subassembly to ensure that absolute ethyl alcohol can in time stop work after being evaporated completely, shorten drying time and reduce the human cost, improve drying efficiency.
Description
Technical Field
The application belongs to the technical field of metal powder drying, and particularly relates to a high-activity metal powder anti-oxidation drying device and a drying method.
Background
At present, the powder metallurgy technology is rapidly developed, the requirement on the particle size of metal powder is higher and higher, when the particle size of the metal powder is reduced, the activity is greatly improved, and the metal powder is easy to oxidize, so that the metal powder is usually immersed in absolute ethyl alcohol to be protected from oxidation when ball milling is carried out, therefore, the high-activity metal powder to be dried is usually immersed in the absolute ethyl alcohol, and when the high-activity metal powder needs to be used, drying treatment needs to be carried out firstly. The existing drying box dries the high-activity metal powder after ball milling, and has the following defects: firstly, the oxygen residue in the oven is high in the early stage of drying, and the metal powder is easy to oxidize, as shown in fig. 1, the oxidized metal powder is in a spherical structure, the property of the powder is changed, and the metal powder cannot be used; secondly, the drying time is long, and the efficiency is low; thirdly, whether the absolute ethyl alcohol is completely evaporated or not cannot be monitored.
Disclosure of Invention
An object of the embodiment of the application is to provide a high-activity metal powder anti-oxidation drying device to solve the technical problems that high-activity metal is easy to oxidize and low in drying efficiency when being dried in the prior art.
In order to achieve the purpose, the technical scheme adopted by the application is as follows: provided is a high-activity metal powder oxidation-preventing drying device, including: the device comprises a drying box, an inert gas supply assembly, a vacuumizing assembly and a liquid level monitoring assembly; the drying oven is characterized in that a heater, a material tray, a thermometer and a vacuum gauge are arranged in the drying oven, the inert gas supply assembly is used for filling inert gas into the drying oven, the vacuum assembly is used for vacuumizing the drying oven, and the liquid level monitoring assembly is used for collecting absolute ethyl alcohol and monitoring the liquid level height change of the absolute ethyl alcohol.
In one embodiment, a tray support is arranged in the drying box, and the material tray is detachably arranged on the tray support and is positioned above the heater.
In one embodiment, the tray support comprises two round rods arranged at intervals, and grooves for being carried on the round rods are formed in the edges of the two ends of the material tray.
In one embodiment, the vacuum assembly comprises a vacuum tube connected with the drying box, an air outlet solenoid valve arranged on the vacuum tube and a vacuum pump.
In one embodiment, the liquid level monitoring assembly comprises a condenser and a storage tank connected with the vacuum tube, a sight glass liquid level sensor is arranged in the storage tank, and the air outlet solenoid valve, the thermometer, the heater, the vacuum gauge and the sight glass liquid level sensor are all electrically connected with a display controller.
In one embodiment, the inert gas comprises a gas cylinder, a gas inlet pipe with one end connected with the gas cylinder and the other end connected with the drying box, and a gas inlet electromagnetic valve arranged on the gas inlet pipe, wherein the gas inlet electromagnetic valve is electrically connected with the display controller.
In one embodiment, the inert gas is one or more combinations of helium, neon, argon, krypton, or xenon.
In one embodiment, the drying box, the material tray and the tray support are all stainless steel pieces.
In one embodiment, the drying box is provided with a sealing door.
Another object of the present application is to provide a high-activity metal powder oxidation preventing drying method, based on the high-activity metal powder oxidation preventing drying apparatus, including the steps of:
s1, pouring the to-be-dried high-activity metal powder soaked in the absolute ethyl alcohol and the absolute ethyl alcohol into a material tray, and placing the material tray in a drying box;
s2, starting the vacuumizing assembly, closing the vacuumizing assembly when the display value of the vacuum gauge is-0.1 MPa, then starting the inert gas supply assembly to enable the display value of the vacuum gauge to be 0MPa, closing the inert gas supply assembly, and repeating the step at least three times;
s3, starting the vacuumizing assembly again to enable the display numerical value of the vacuum gauge to be-0.1 MPa, starting the liquid level monitoring assembly, starting the heater to work, and keeping the temperature in the drying box at 40-60 ℃ by using the thermometer;
s4, in the heating and drying process of the heater, the absolute ethyl alcohol in the material tray is continuously evaporated and enters the liquid level monitoring assembly for collection, and the liquid level height of the absolute ethyl alcohol is monitored by the liquid level monitoring assembly;
s5, when the liquid level height of the absolute ethyl alcohol in the liquid level monitoring assembly does not change for more than 30 minutes, closing the heater, the vacuumizing assembly and the liquid level monitoring assembly;
and S6, starting the inert gas supply assembly, taking the material tray out of the drying oven when the display value of the vacuum gauge is 0MPa, and finishing drying.
The application provides a high-activity metal powder anti-oxidation drying device and a drying method, which have the beneficial effects that: the inert gas supply assembly and the vacuumizing assembly are matched with each other to exhaust the air in the drying box, so that the high-activity metal powder is prevented from being oxidized due to residual oxygen; the heater and the thermometer are used for realizing low-temperature constant-temperature heating, so that the absolute ethyl alcohol is quickly evaporated under the condition of ensuring the stable performance of the high-activity metal powder, and the drying time is shortened; can collect and observe the liquid level height to the absolute ethyl alcohol after the evaporation through liquid level monitoring subassembly to ensure that absolute ethyl alcohol is evaporated completely, can in time stop work after ensuring the drying to accomplish, shorten drying time and reduce the human cost, improve drying efficiency.
Drawings
In order to more clearly illustrate the technical solutions in the embodiments of the present application, the drawings needed to be used in the embodiments or the prior art descriptions will be briefly described below, and it is obvious that the drawings in the following description are only some embodiments of the present application, and it is obvious for those skilled in the art to obtain other drawings without creative efforts.
FIG. 1 is a diagram of the morphology of highly reactive metal powder obtained after drying in a drying oven according to the prior art;
fig. 2 is a schematic internal plan view of a high-activity metal powder oxidation preventing and drying device provided in an embodiment of the present application;
fig. 3 is a schematic external plan view of a high-activity metal powder oxidation preventing and drying device provided in an embodiment of the present application;
FIG. 4 is a dried morphology of a highly reactive metal powder in an example of the present application.
Wherein, in the figures, the respective reference numerals:
1. a drying oven; 2. a heater; 3. a material tray; 4. a tray support; 5. a thermometer; 6. a vacuum gauge; 7. an air inlet pipe; 8. an air inlet solenoid valve; 9. an air outlet pipe; 10. an air outlet electromagnetic valve; 11. a vacuum pump; 12. a condenser; 13. a vacuum tube; 14. a storage tank; 15. a sight glass liquid level sensor; 16. and (4) sealing the door.
Detailed Description
In order to make the technical problems, technical solutions and advantageous effects to be solved by the present application clearer, the present application is further described in detail below with reference to the accompanying drawings and embodiments. It should be understood that the specific embodiments described herein are merely illustrative of the present application and are not intended to limit the present application.
It will be understood that when an element is referred to as being "secured to" or "disposed on" another element, it can be directly on the other element or be indirectly on the other element. When an element is referred to as being "connected to" another element, it can be directly connected to the other element or be indirectly connected to the other element.
It will be understood that the terms "length," "width," "upper," "lower," "front," "rear," "left," "right," "vertical," "horizontal," "top," "bottom," "inner," "outer," and the like, as used herein, refer to an orientation or positional relationship indicated in the drawings that is solely for the purpose of facilitating the description and simplifying the description, and do not indicate or imply that the device or element being referred to must have a particular orientation, be constructed and operated in a particular orientation, and thus should not be considered as limiting the present application.
Furthermore, the terms "first", "second" and "first" are used for descriptive purposes only and are not to be construed as indicating or implying relative importance or implicitly indicating the number of technical features indicated. Thus, a feature defined as "first" or "second" may explicitly or implicitly include one or more of that feature. In the description of the present application, "a plurality" means two or more unless specifically limited otherwise.
Referring to fig. 2 to 4, a high-activity metal powder oxidation preventing and drying apparatus according to an embodiment of the present invention will be described in detail. The anti-oxidation drying device for the high-activity metal powder comprises a drying box 1, an inert gas supply assembly, a vacuumizing assembly and a liquid level monitoring assembly.
The drying oven comprises a drying oven 1, a heater 2, a material tray 3, a thermometer 5 and a vacuum gauge 6, wherein the heater 2 is arranged below the material tray 3, the heater 2 is used for heating the inside of the drying oven 1 so as to accelerate evaporation of absolute ethyl alcohol in the material tray 3, and the thermometer 5 is used for monitoring the temperature in the drying oven 1 and ensuring that the heater 2 carries out low-temperature constant-temperature heating on the inside of the drying oven 1 so as to avoid the influence of overhigh temperature on the stability of high-activity metal powder; the material tray 3 is used for containing a mixture of high-activity metal powder to be dried and absolute ethyl alcohol; the vacuum gauge 6 is used to monitor the degree of vacuum in the drying box 1.
The inert gas supply assembly is arranged on the outer side of the drying box 1 and is used for filling inert gas into the drying box 1 so as to exhaust air containing oxygen in the drying box 1; the vacuum assembly is arranged on the outer side of the drying box 1 and is used for vacuumizing the drying box 1 so as to exhaust air and inert gas in the drying box 1 for vacuumizing, the inert gas supply assembly and the vacuumizing assembly are used for continuously inflating and exhausting for several times, and the vacuum gauge 6 is matched to exhaust oxygen in the drying box 1, so that the high-activity metal powder is prevented from being oxidized by residual oxygen; the liquid level monitoring assembly is arranged on the outer side of the drying box 1 and used for collecting absolute ethyl alcohol which is heated and evaporated, and the liquid level monitoring assembly can monitor the liquid level height change of the absolute ethyl alcohol, so that whether the drying work is finished or not is judged.
In the embodiment, the inert gas supply assembly and the vacuumizing assembly are matched with each other to exhaust the air in the drying box 1, so that the air in the drying box 1 is exhausted, and the high-activity metal powder is prevented from being oxidized due to residual oxygen; the heater 2 and the thermometer 5 are used for realizing low-temperature constant-temperature heating, so that the absolute ethyl alcohol is quickly evaporated under the condition of ensuring the stable performance of the high-activity metal powder, and the drying time is shortened; can collect and observe the liquid level height to the absolute ethyl alcohol after the evaporation through liquid level monitoring subassembly to ensure that absolute ethyl alcohol is evaporated completely, can in time stop work after ensuring the drying to accomplish, shorten drying time and reduce the human cost, improve drying efficiency. Therefore, the anti-oxidation drying device of high activity metal powder that this application embodiment provided has that anti-oxidation is effectual, drying time is short, efficient and can monitor whether the drying process is accomplished. As shown in fig. 4, after the drying apparatus according to the embodiment of the present invention dried the highly reactive metal powder after ball milling, the metal powder was not oxidized and had a lamellar structure, and the powder was well alloyed in a solid state.
As shown in fig. 2-3, a tray support 4 is arranged in the drying box 1, and the material tray 3 is detachably mounted on the tray support 4 and above the heater 2. The tray support 4 is used for facilitating the placement of the material tray 3 and the taking out of the drying box 1. Specifically, tray support 4 includes the round bar that two intervals set up, and the both ends of round bar are fixed respectively on the inner wall of drying cabinet 1, and the both ends edge of material tray 3 is equipped with and is used for carrying the recess on the round bar, makes the installation and the dismantlement of material tray 3 have convenience and fastness like this. The middle of the material tray 3 is concave and is used for containing high-activity metal powder to be dried and absolute ethyl alcohol.
As shown in fig. 2 and 3, in the present embodiment, the vacuum assembly includes a vacuum pipe 13 connected to the drying box 1, an air outlet solenoid valve 10 provided on the vacuum pipe 13, and a vacuum pump 11. Specifically, the drying oven 1 is provided with an air outlet pipe 9, one end of the air outlet pipe 9 is communicated with the inside of the drying oven 1, the other end of the air outlet pipe 9 is connected with a vacuum pipe 13, an air outlet electromagnetic valve 10 is arranged on the air outlet pipe 9, a vacuum pump 11 is arranged on the vacuum pipe 13, and the vacuum pump 11 is used for pumping out air in the drying oven 1.
As shown in fig. 2 and 3, in the present embodiment, the liquid level monitoring assembly includes a condenser 12 and a storage tank 14 connected to the vacuum tube 13, the condenser 12 is used for cooling the absolute ethanol in the vacuum tube 13 into liquid absolute ethanol, and the storage tank 14 is used for collecting the cooled absolute ethanol; a sight glass liquid level sensor 15 is arranged in the storage tank 14, and the sight glass liquid level sensor 15 is used for monitoring the liquid level change condition of the anhydrous ethanol in the storage tank. In the present embodiment, the air outlet solenoid valve 10, the thermometer 5, the vacuum gauge 6, the heater 2, and the sight glass liquid level sensor 15 are all electrically connected to the display controller. The display controller at least comprises a control part and a display part, wherein the control part is used for controlling the work of the electromagnetic valve 10 of each air outlet, the thermometer 5, the vacuum gauge 6, the heater 2 and the liquid level sensor 15 of the sight glass, the display part is used for displaying information such as temperature, vacuum degree, liquid level height and the like, and the display controller is a conventional calculator display system.
In this embodiment, the inert gas includes a gas cylinder (not shown), a gas inlet pipe 7 having one end connected to the gas cylinder and the other end connected to the drying box 1, and a gas inlet solenoid valve 8 disposed on the gas inlet pipe 7, and the gas inlet solenoid valve 8 is electrically connected to the display controller. Inert gas is arranged in the gas cylinder, and the gas inlet electromagnetic valve 8 is used for controlling the opening and closing of the gas inlet pipe 7 so as to discharge the inert gas into the drying box 1. In this embodiment, the inert gas is one or a combination of multiple kinds of helium, neon, argon, krypton, or xenon, and the multiple combinations refer to a mixture of multiple kinds of single inert gases, which may be two kinds, or three kinds, four kinds, or five kinds. Preferably, in this embodiment, the inert gas in the cylinder is argon.
In this embodiment, the drying box 1, the material tray 3, and the tray holder 4 are made of stainless steel, specifically, 1Cr18Ni9Ti stainless steel. In the present embodiment, the heater 2 is a nichrome wire heater. In this embodiment, drying cabinet 1 is hollow cuboid box, and the lateral wall of box adopts the mode that inner wall and outer wall combine, sets up thermal insulation material between inner wall and the outer wall, and drying cabinet 1 has thermal-insulated effect like this, can make the temperature in drying cabinet 1 more even, reduces the heat and scatters and disappears for rate of heating. Be equipped with sealing door 16 at a side of drying cabinet 1, sealing door 16's effect makes things convenient for getting of material tray 3 to put, and sealing door 16 global is equipped with round or many rings of sealing rubber ring for guarantee the leakproofness, is equipped with the tool to lock on sealing door 16, is used for guaranteeing the closed fastness of sealing door 16.
The embodiment of the application also provides a high-activity metal powder anti-oxidation drying method, which is based on the high-activity metal powder anti-oxidation drying device stated above, and the drying method comprises the following steps: putting the materials to be dried, exhausting gas, heating, monitoring the drying condition, determining the drying condition, taking out the materials and finishing drying. Specifically, the method comprises the following steps:
s1, pouring the anhydrous ethanol-soaked high-activity metal powder to be dried together with the anhydrous ethanol into the material tray 3, placing the material tray 3 in the drying oven 1, and then closing the sealing door 16.
S2, starting the vacuumizing assembly, vacuumizing the air in the drying box 1, and when the display value of the vacuum gauge 6 is-0.1 MPa, indicating that the inside of the drying box 1 is in an absolute vacuum state, and at the moment, closing the vacuumizing assembly; then, starting the inert gas supply assembly, filling inert gas into the drying box 1 to enable the display value of the vacuum gauge 6 to be 0MPa, enabling the drying box 1 to return to the normal air pressure state again, at the moment, closing the inert gas supply assembly, and repeating the step for at least three times; in the step, vacuum pumping and inert gas filling are repeated for more than three times to ensure that oxygen in the drying box 1 is exhausted, oxidation of high-activity metal powder by the oxygen is avoided during subsequent heating, and the drying quality is ensured.
S3, starting the vacuumizing assembly again, discharging inert gas in the drying box 1 to enable the display value of the vacuum gauge 6 to be-0.1 MPa, then starting the liquid level monitoring assembly, starting the heater 2 to work at the same time, and keeping the temperature in the drying box 1 at 40-60 ℃ by using the thermometer 5; the temperature in the drying oven 1 was gradually increased to 60 c, and then constant temperature heating was performed while maintaining the temperature at 60 c.
S4, continuously evaporating the absolute ethyl alcohol in the material tray 3 in the heating and drying process of the heater 2 along with the time, collecting the absolute ethyl alcohol in the material tray in the liquid level monitoring assembly, and monitoring the liquid level height of the absolute ethyl alcohol by using the liquid level monitoring assembly; the drying progress can be determined according to the change condition of the liquid level of the anhydrous ethanol, and when the liquid level changes more and more slowly, the drying is closer to the completion.
S5, when the liquid level height of the absolute ethyl alcohol in the liquid level monitoring assembly does not change for more than 30 minutes, closing the heater 2, the vacuumizing assembly and the liquid level monitoring assembly; when the liquid level of the absolute ethyl alcohol does not change for more than 30 minutes, the absolute ethyl alcohol in the material tray 3 is completely evaporated, and the drying is finished.
And S6, after the drying is finished, starting the inert gas supply assembly, filling the inert gas into the drying oven 1, opening the sealing door 16 when the display value of the vacuum gauge 6 is 0MPa, taking the material tray 3 out of the drying oven 1, and finishing the drying. The purpose of the inert gas filling is to ensure the balance of the gas pressure inside and outside the drying box 1.
In the embodiment of the application, use high-purity argon gas to carry out cubic air exhaust method, can reduce the residual oxygen in drying cabinet 1, avoid high active metal powder to be oxidized by residual oxygen in drying cabinet 1 at dry initial stage, use nichrome electric stove wire heater to treat that dry metal powder carries out low temperature constant temperature heating, accelerate anhydrous alcohol speed of volatilizing, shorten drying time greatly, use sight glass liquid level sensor 15 to monitor the liquid level after the condensation simultaneously, realized the dry back of accomplishing, the dry purpose of automatic shutdown, reduce the human cost, avoid visual error to lead to the dry condition of just finishing the drying in advance unfinished.
The above description is only exemplary of the present application and should not be taken as limiting the present application, as any modification, equivalent replacement, or improvement made within the spirit and principle of the present application should be included in the protection scope of the present application.
Claims (10)
1. A high-activity metal powder anti-oxidation drying device is characterized by comprising: the device comprises a drying box (1), an inert gas supply assembly, a vacuumizing assembly and a liquid level monitoring assembly; the drying box (1) is internally provided with a heater (2), a material tray (3), a thermometer (5) and a vacuum gauge (6), the inert gas supply assembly is used for filling inert gas into the drying box (1), the vacuum assembly is used for vacuumizing the drying box (1), and the liquid level monitoring assembly is used for collecting evaporated absolute ethyl alcohol and monitoring the liquid level height change of the absolute ethyl alcohol.
2. The high-activity metal powder oxidation preventing drying device according to claim 1, wherein: a tray support (4) is arranged in the drying box (1), and the material tray (3) is detachably carried on the tray support (4) and is positioned above the heater (2).
3. The high-activity metal powder oxidation preventing drying device according to claim 2, wherein: the tray support (4) comprises two round rods arranged at intervals, and grooves used for being carried on the round rods are formed in the edges of the two ends of the material tray (3).
4. The high-activity metal powder oxidation preventing drying device according to claim 3, wherein: the vacuum assembly comprises a vacuum pipe (13) connected with the drying box (1), and an air outlet electromagnetic valve (10) and a vacuum pump (11) which are arranged on the vacuum pipe (13).
5. The high-activity metal powder oxidation preventing drying device according to claim 4, wherein: the liquid level monitoring assembly comprises a condenser (12) and a storage box (14) which are connected with a vacuum tube (13), wherein a sight glass liquid level sensor (15) is arranged in the storage box (14), and the gas outlet electromagnetic valve (10) is connected with the thermometer (5) and the heater (2) is connected with the vacuum gauge (6) and the sight glass liquid level sensor (15) which are electrically connected with the display controller.
6. The high-activity metal powder oxidation preventing drying device according to claim 5, wherein: the inert gas comprises a gas cylinder, a gas inlet pipe (7) and a gas inlet electromagnetic valve (8), wherein one end of the gas inlet pipe is connected with the gas cylinder, the other end of the gas inlet pipe is connected with the drying box (1), the gas inlet electromagnetic valve (8) is arranged on the gas inlet pipe (7), and the gas inlet electromagnetic valve (8) is electrically connected with the display controller.
7. The high-activity metal powder oxidation preventing drying device according to any one of claims 1 to 6, wherein: the inert gas is one or a combination of helium, neon, argon, krypton or xenon.
8. The high-activity metal powder oxidation preventing drying device according to claim 2, wherein: the drying box (1), the material tray (3) and the tray support (4) are all stainless steel parts.
9. The high-activity metal powder oxidation preventing drying device according to any one of claims 1 to 6, wherein: and a sealing door (16) is arranged on the drying box (1).
10. A high-activity metal powder oxidation preventing drying method based on the high-activity metal powder oxidation preventing drying apparatus according to any one of claims 1 to 9, comprising the steps of:
s1, pouring the high-activity metal powder to be dried, which is soaked in the absolute ethyl alcohol, into the material tray (3) together with the absolute ethyl alcohol, and placing the material tray (3) into the drying box (1);
s2, starting the vacuumizing assembly, closing the vacuumizing assembly when the display value of the vacuum gauge (6) is-0.1 MPa, then starting the inert gas supply assembly to enable the display value of the vacuum gauge (6) to be 0MPa, closing the inert gas supply assembly, and repeating the step at least three times;
s3, starting the vacuumizing assembly again to enable the display value of the vacuum gauge (6) to be-0.1 MPa, starting the liquid level monitoring assembly, starting the heater (2) to work, and keeping the temperature in the drying box (1) at 40-60 ℃ by using the thermometer (5);
s4, in the heating and drying process of the heater (2), the absolute ethyl alcohol in the material tray (3) is continuously evaporated and enters the liquid level monitoring assembly for collection, and the liquid level height of the absolute ethyl alcohol is monitored by the liquid level monitoring assembly;
s5, when the liquid level height of the absolute ethyl alcohol in the liquid level monitoring assembly does not change for more than 30 minutes, closing the heater (2), the vacuumizing assembly and the liquid level monitoring assembly;
and S6, starting the inert gas supply assembly, taking the material tray (3) out of the drying box (1) when the display value of the vacuum gauge (6) is 0MPa, and finishing drying.
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Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
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| CN113913797A (en) * | 2021-09-17 | 2022-01-11 | 金华职业技术学院 | Method for drying and protecting chemical plating powder |
| CN114177858A (en) * | 2021-12-13 | 2022-03-15 | 清氢(北京)科技有限公司 | Large-scale preparation method and large-scale preparation device of electrocatalyst |
| CN115307388A (en) * | 2022-08-16 | 2022-11-08 | 苏州倍丰智能科技有限公司 | Metal powder cold drying device |
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| CN114177858A (en) * | 2021-12-13 | 2022-03-15 | 清氢(北京)科技有限公司 | Large-scale preparation method and large-scale preparation device of electrocatalyst |
| CN115307388A (en) * | 2022-08-16 | 2022-11-08 | 苏州倍丰智能科技有限公司 | Metal powder cold drying device |
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