CN215924397U - Nanometer magnesium hydride powder preparation facilities - Google Patents
Nanometer magnesium hydride powder preparation facilities Download PDFInfo
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- CN215924397U CN215924397U CN202122123246.6U CN202122123246U CN215924397U CN 215924397 U CN215924397 U CN 215924397U CN 202122123246 U CN202122123246 U CN 202122123246U CN 215924397 U CN215924397 U CN 215924397U
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Abstract
The utility model belongs to the technical field of hydrogenated magnesium powder preparation, and particularly discloses a nano hydrogenated magnesium powder preparation device which comprises an electric arc heating chamber and a high-voltage power supply in clearance fit with the electric arc heating chamber, wherein the electric arc heating chamber is respectively provided with a collection system and a vacuum system which are matched with the electric arc heating chamber, and the vacuum system is provided with a gas supply system; the electric arc heating chamber comprises a heating chamber shell, a reaction table which is symmetrical relative to the center of the bottom surface of the heating chamber shell is arranged on the bottom surface of the heating chamber shell, a conductive crucible is arranged on the reaction table, and the conductive crucible is matched with an electrode gun arranged in the electric arc heating chamber; the preparation method has simple and convenient operation steps, can greatly improve the quality of the obtained nano magnesium hydride powder by enabling magnesium to react through electric arc heating in the argon and hydrogen environments, has small energy consumption and controllable operation conditions, is safe and pollution-free, is suitable for the commercial production of nano magnesium hydride, and is beneficial to the development of magnesium-based hydrogen storage materials.
Description
Technical Field
The utility model belongs to the technical field of hydrogenated magnesium powder preparation, and particularly relates to a device for preparing nano-hydrogenated magnesium powder.
Background
Magnesium and its alloys have high hydrogen storage capacity, abundant mineral resources and low cost, and are widely regarded as metal-based hydrogen storage materials and battery materials most likely to be industrially applied in the future. Pure magnesium has a hydrogen storage capacity of up to 7.6wt%, and is the metal material with the highest mass hydrogen storage density among the practical reversible hydrogen storage materials. However, the magnesium surface is usually covered with a layer of oxide, and the magnesium is activated before the normal hydrogen absorption and desorption cycle, so that the oxide layer on the magnesium surface is damaged, and the hydrogen absorption and desorption kinetic and thermodynamic properties of pure magnesium are not ideal.
In the prior art, the magnesium-based hydrogen storage alloy is mainly prepared by an induction melting method, a mechanical alloying method and a two-step method. The induction melting method needs to continuously add magnesium according to the change of melt components and carry out multi-step remelting, and has complex manufacturing process and high cost; the mechanical alloying method has the advantages that the time for preparing the magnesium-based alloy is long, the preparation efficiency is low, cracks and pores on the surface of the powder can cause particle pulverization when hydrogen is repeatedly absorbed and released, so that the hydrogen storage performance is lost, the atmosphere needs to be protected, and the product is easy to be polluted; in the two-step method, the melting point of magnesium is low, the evaporation heat is small, the vapor pressure is far greater than that of nickel under the action of electric arc, and the content of magnesium in powder obtained when direct-current electric arc acts on the magnesium-nickel alloy block is far greater than that of nickel.
SUMMERY OF THE UTILITY MODEL
In order to solve the problems of complex preparation process, low preparation efficiency, high preparation cost and the like in the preparation process of the nano magnesium hydride powder, the nano magnesium hydride powder preparation device is provided.
Based on the above purpose, the utility model is realized by the following technical scheme:
a nanometer magnesium hydride powder preparation device comprises an electric arc heating chamber and a high-voltage power supply in clearance fit with the electric arc heating chamber, wherein the electric arc heating chamber is respectively provided with a collection system and a vacuum system which are matched with the electric arc heating chamber, and the vacuum system is provided with a gas supply system; the electric arc heating chamber comprises a heating chamber shell, a reaction table which is symmetrical relative to the center of the bottom surface of the heating chamber shell is arranged on the bottom surface of the heating chamber shell, a conductive crucible is arranged on the reaction table, and the conductive crucible is matched with an electrode gun arranged in the electric arc heating chamber.
Preferably, the collecting system comprises a collecting shell, a collector is arranged in the collecting shell, a collecting connecting pipe and a collecting input pipe connected with the heating chamber shell are arranged on the collector, and a filter screen matched with the outlet end of the collecting input pipe is arranged in the collector; the collecting connecting pipe is provided with a collecting air pump which is connected with the heating chamber shell through a collecting output pipe.
Preferably, the electrode gun is connected with an electrode adjusting rod arranged on the heating chamber shell; one electrode of the high-voltage power supply is connected with the electrode gun through a power line, and the other electrode is connected with the reaction table through a power line; the high-voltage power supply is provided with a current regulator matched with the high-voltage power supply.
Preferably, the vacuum system comprises a high-pressure air pump, the high-pressure air pump is connected with the shell of the heating chamber through an air transmission pipeline, and an air control valve is arranged on the air transmission pipeline; the high-pressure air pump is connected with an air pump control switch.
Preferably, the gas supply system comprises an argon tank and a hydrogen tank which are in clearance fit, the argon tank is connected with the gas transmission pipeline through an argon pipeline, and an argon control valve is arranged on the argon pipeline; the hydrogen tank is connected with the gas transmission pipeline through a hydrogen pipeline, and a hydrogen control valve is arranged on the hydrogen pipeline.
Preferably, the electrode gun is provided as a tungsten electrode gun; the conductive crucible is set as a graphite crucible.
Preferably, the aperture of the filter screen is less than or equal to 100 nm.
Preferably, the heating chamber housing is provided with a gas pressure gauge.
Preferably, the collecting input pipe, the collecting connecting pipe and the collecting output pipe are all provided with a gas flowmeter.
Compared with the prior art, the utility model has the following beneficial effects:
(1) the vacuum system is used for performing vacuum pumping action on the collecting system and the arc heating chamber, and the gas supply system is used for supplying argon and hydrogen to the arc heating chamber, so that the hydrogen and pure magnesium can be conveniently and quickly reacted to generate nano magnesium hydride powder; high voltage power supply is the electrode rifle respectively, the electrically conductive crucible supply high voltage power supply on the reaction bench, carry out arc heating to the pure magnesium piece in the electrically conductive crucible, make magnesium and hydrogen reaction generate nanometer magnesium hydride granule, argon gas plays the purpose of auxiliary reaction, the nanometer magnesium hydride granule that generates is collected through collecting system and is handled, can not only collect the nanometer magnesium hydride granule that generates through collecting system, can also be to the hydrogen that is rich in, argon gas carries out reuse, effectively reduce resource loss and the pollution to the environment.
(2) The preparation method has simple and convenient operation steps, can greatly improve the quality of the obtained nano magnesium hydride powder by enabling magnesium to react through electric arc heating in the argon and hydrogen environments, has small energy consumption and controllable operation conditions, is safe and pollution-free, is suitable for the commercial production of nano magnesium hydride, and is beneficial to the development of magnesium-based hydrogen storage materials.
Drawings
Fig. 1 is a schematic structural view of the present invention in example 1.
In the figure, 1, an arc heating chamber, 2, a collection system, 3, a vacuum system, 4, a gas supply system, 101, a heating chamber shell, 102, a conductive crucible, 103, a reaction table, 104, an electrode gun, 105, a high-voltage power supply, 106, an electrode adjusting rod, 201, a filter screen, 202, a collector, 203, a collection gas pump, 204, a collection input pipe, 205, a collection connecting pipe, 206, a collection output pipe, 301, a high-voltage gas pump, 302, a gas control valve, 303, a gas transmission pipeline, 304, a gas pump control switch, 401, an argon gas tank, 402, a hydrogen gas tank, 403, an argon gas control valve, 404 and a hydrogen gas control valve.
Detailed Description
The present invention is further illustrated by the following specific examples, which are not intended to limit the scope of the utility model.
Example 1
A nanometer magnesium hydride powder preparation device has a structure shown in figure 1, and comprises an arc heating chamber 1 and a high-voltage power supply 105 in clearance fit with the arc heating chamber 1, wherein the arc heating chamber 1 is respectively provided with a collecting system 2 and a vacuum system 3 which are matched with the arc heating chamber 1, and the vacuum system 3 is provided with a gas supply system 4; the arc heating chamber 1 comprises a heating chamber shell 101, a reaction platform 103 which is symmetrical relative to the center of the bottom surface of the heating chamber shell 101 is arranged on the bottom surface of the heating chamber shell 101, a conductive crucible 102 is arranged on the reaction platform 103, and the conductive crucible 102 is matched with an electrode gun 104 arranged in the arc heating chamber 1.
The collecting system 2 comprises a collecting shell, a collector 202 is arranged in the collecting shell, a collecting connecting pipe 205 and a collecting input pipe 204 connected with the heating chamber shell 101 are arranged on the collector 202, and a filter screen 201 matched with the outlet end of the collecting input pipe 204 is arranged in the collector 202; the collection connecting pipe 205 is provided with a collection air pump 203, and the collection air pump 203 is connected to the heating chamber housing 101 through a collection output pipe 206.
The electrode gun 104 is connected with an electrode adjusting rod 106 arranged on the heating chamber shell 101; one electrode of a high-voltage power supply 105 is connected with the electrode gun 104 through a power line, and the other electrode is connected with the reaction table 103 through a power line; the high voltage power supply 105 is provided with a current regulator that cooperates with the high voltage power supply 105.
The vacuum system 3 comprises a high-pressure air pump 301, the high-pressure air pump 301 is connected with the heating chamber shell 101 through an air transmission pipeline 303, and an air control valve 302 is arranged on the air transmission pipeline 303; the high-pressure air pump 301 is connected to an air pump control switch 304. The gas supply system 4 comprises an argon tank 401 and a hydrogen tank 402 which are in clearance fit, the argon tank 401 is connected with a gas transmission pipeline 303 through an argon pipeline, and an argon control valve 403 is arranged on the argon pipeline; the hydrogen tank 402 is connected to the gas delivery pipe 303 via a hydrogen pipe, and a hydrogen control valve 404 is provided on the hydrogen pipe.
The electrode gun 104 is configured as a tungsten electrode gun; the conductive crucible 102 is provided as a graphite crucible. The aperture of the filter screen 201 is less than or equal to 100 nm. The heating chamber casing 101 is provided with a gas gauge. And gas flow meters are arranged on the collecting input pipe 204, the collecting connecting pipe 205 and the collecting output pipe 206.
The preparation device comprises the following operation processes: firstly, a pure magnesium block is placed in a conductive crucible 102 on a reaction platform 103 in a heating chamber shell 101 in an arc heating chamber 1, then air in the device is discharged through a vacuum system 3, an air pump control switch 304 is opened, a gas control valve 302 is opened, a high-pressure air pump 301 is started, the air is pumped out along a gas transmission pipeline 303 by the high-pressure air pump 301, so that the device is in a vacuum state, then the gas control valve 302 and the air pump control switch 304 are closed, an argon control valve 403 is opened, argon in an argon tank 401 flows to the gas transmission pipeline 303 through the argon pipeline, then the argon enters the heating chamber shell 101, detection is carried out through a gas pressure gauge, when the pressure in the heating chamber shell 101 reaches 45KPa, the argon control valve 403 is closed, a hydrogen control valve 404 is opened, hydrogen in a hydrogen tank 402 flows to the gas transmission pipeline 303 through the hydrogen pipeline, and then the hydrogen enters the heating chamber shell 101, when the pressure in the heating chamber shell 101 reaches 62KPa, closing the hydrogen control valve 404, and at this time, the step of introducing pure argon and hydrogen into the preparation device by the gas supply system 4 is completed; then, the collection system 2 is started, the collection air pump 203 performs pumping action on the collector 202 through the collection connecting pipe 205, so that the mixed gas in the heating chamber shell 101 enters the filter screen 201 in the collector 202 along the collection input pipe 204 and then enters the collection connecting pipe 205 and enters the heating chamber shell 101 through the collection output pipe 206, the mixed gas circulates in the collection system 2 of the preparation device, and the gas flow meter measures the circulating gas flow velocity of the mixed gas in the collection input pipe 204, the collection connecting pipe 205 and the collection output pipe 206, so that the circulating gas flow velocity reaches 100L/min; then, a switch of a high-voltage power supply 105 is turned on, the current regulator is used for regulating to enable the arcing current between the electrode gun 104 and the conductive crucible 102 to be 100A, the electrode gun 104 is electrified for arc heating, after formal preparation, the current is regulated to be 150A through the current regulator, magnesium and hydrogen react to generate nano magnesium hydride particles under the internal condition of the device, the generated nano magnesium hydride particles reach a filter screen 201 of the collection system 2 along a collection input pipe 204 along with circulating airflow for collection, and the excellent nano magnesium hydride material can be obtained after the preparation process is finished.
Note that: the pressure in the utility model is required to reach 45KPa after argon is introduced, the pressure reaches 62KPa after hydrogen is introduced, the distance between an electrode gun 104 and a pure magnesium block is controlled to be about 1cm, the electrode gun can be adjusted by an electrode adjusting rod 106, the arcing current of the electrode gun 104 is 100A, the current is required to be increased to 150A during preparation, and the circulating airflow generated by a collecting system 2 is required to reach 100L/min.
Example 2
A device for preparing nano magnesium hydride powder is different from the device in the embodiment 1 in that: a sealing gasket ring matched with the heating chamber shell 101 is arranged on the electrode adjusting rod 106, and folding sealing cloth hermetically connected with the electrode adjusting rod 106 is arranged on the inner side of the sealing gasket ring; an adjusting shaft is arranged on the heating chamber shell 101, an adjusting bracket is arranged on the adjusting shaft, an adjusting rack is arranged on the adjusting bracket, and the adjusting rack is connected with an adjusting gear arranged on the adjusting shaft; the electrode adjusting rod 106 is provided with an adjusting rod bracket fixedly connected with the adjusting rack; a gear limiting rod matched with the adjusting gear is arranged on the adjusting bracket; the adjusting gear is driven to rotate by stirring the stirring fin on the adjusting shaft, the adjusting rack is driven to move, the position of the electrode adjusting rod 106 is adjusted, the purpose of adjusting the electrode gun 104 is achieved, and the electrode gun 104 can be conveniently adjusted according to different positions of magnesium on the conductive crucible 102.
Example 3
A device for preparing nano magnesium hydride powder is different from the device in the embodiment 1 in that: a collecting port matched with the bottom end of the collector 202 is formed in the collecting shell, a replaceable filter screen structure is arranged in the collecting port and comprises a collecting rotating shaft arranged in the collecting shell, a filter screen rotating disk is arranged on the collecting rotating shaft, a plurality of filter screen fixing grooves are formed in the filter screen rotating disk, and filter screens 201 matched with the outlet end of the collecting input pipe 204 are arranged in the filter screen fixing grooves; the filter screen rotating disc is provided with a filter screen adjusting ring matched with the filter screen 201.
The above description is only for the purpose of illustrating the preferred embodiments of the present invention and is not to be construed as limiting the present invention, but rather as the following description is intended to cover all modifications, equivalents and improvements falling within the spirit and scope of the present invention.
Claims (9)
1. A nanometer magnesium hydride powder preparation device comprises an electric arc heating chamber and a high-voltage power supply in clearance fit with the electric arc heating chamber, and is characterized in that a collecting system and a vacuum system which are matched with the electric arc heating chamber are respectively arranged on the electric arc heating chamber, and a gas supply system is arranged on the vacuum system; the electric arc heating chamber comprises a heating chamber shell, a reaction table which is symmetrical relative to the center of the bottom surface of the heating chamber shell is arranged on the bottom surface of the heating chamber shell, a conductive crucible is arranged on the reaction table, and the conductive crucible is matched with an electrode gun arranged in the electric arc heating chamber.
2. The apparatus for preparing nano magnesium hydride powder according to claim 1, wherein the collection system comprises a collection housing, a collector is provided in the collection housing, the collector is provided with a collection connection pipe and a collection input pipe connected to the housing of the heating chamber, and a filter screen is provided in the collector and is engaged with an outlet end of the collection input pipe; and a collecting air pump is arranged on the collecting connecting pipe and is connected with the heating chamber shell through a collecting output pipe.
3. The apparatus for preparing nano magnesium hydride powder according to claim 2, wherein the electrode gun is connected to an electrode adjusting lever provided on a housing of the heating chamber; one electrode of the high-voltage power supply is connected with the electrode gun through a power line, and the other electrode of the high-voltage power supply is connected with the reaction table through a power line; and a current regulator matched with the high-voltage power supply is arranged on the high-voltage power supply.
4. The device for preparing nano magnesium hydride powder according to claim 3, wherein the vacuum system comprises a high pressure gas pump, the high pressure gas pump is connected with the shell of the heating chamber through a gas transmission pipeline, and a gas control valve is arranged on the gas transmission pipeline; the high-pressure air pump is connected with an air pump control switch.
5. The apparatus for preparing nano magnesium hydride powder according to claim 4, wherein the gas supply system comprises an argon tank and a hydrogen tank which are in clearance fit, the argon tank is connected with a gas transmission pipeline through an argon pipeline, and an argon control valve is arranged on the argon pipeline; the hydrogen tank is connected with a gas transmission pipeline through a hydrogen pipeline, and a hydrogen control valve is arranged on the hydrogen pipeline.
6. The apparatus for preparing nano magnesium hydride powder according to claim 5, wherein the electrode gun is configured as a tungsten electrode gun; the conductive crucible is a graphite crucible.
7. The apparatus for preparing nano magnesium hydride powder as claimed in claim 6, wherein the aperture of the filter screen is not more than 100 nm.
8. The apparatus for preparing nano magnesium hydride powder as claimed in claim 7, wherein a gas pressure gauge is provided on the housing of the heating chamber.
9. The apparatus for preparing nano magnesium hydride powder as claimed in claim 8, wherein the collecting input tube, the collecting connection tube and the collecting output tube are provided with gas flow meters.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202122123246.6U CN215924397U (en) | 2021-09-03 | 2021-09-03 | Nanometer magnesium hydride powder preparation facilities |
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| Application Number | Priority Date | Filing Date | Title |
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| CN202122123246.6U CN215924397U (en) | 2021-09-03 | 2021-09-03 | Nanometer magnesium hydride powder preparation facilities |
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| CN215924397U true CN215924397U (en) | 2022-03-01 |
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| CN202122123246.6U Active CN215924397U (en) | 2021-09-03 | 2021-09-03 | Nanometer magnesium hydride powder preparation facilities |
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