Induction arc micro-explosion metal oxide powder preparation device

Abstract

The utility model discloses an inductive arc micro-explosion metal oxide powder preparation device which comprises an oxide preparation mechanism and a cyclone separator, the oxide preparation mechanism comprises a tank body, an induction arc reactor located in the tank body and a high-frequency generator located outside the tank body, and the tank body is provided with an air inlet and a first exhaust port; the induction arc reactor comprises a barrel, the barrel comprises a reaction section, a cooling section and a collecting section which are sequentially arranged from top to bottom, and an induction coil connected with the high-frequency generator is wound around the peripheral side of the reaction section; a cooling jacket is arranged on the peripheral side of the cooling section, and a second exhaust port communicated with the first exhaust port is formed in one side of the collecting section; an outer ring air rotating part is fixed at the top end of the cylinder body, a central air rotating part is fixed at the top end of the outer ring air rotating part, a powder feeding pipe penetrates through the central air rotating part, and the top end of the powder feeding pipe is communicated with the air inlet; and an air inlet of the cyclone separator is communicated with the exhaust port. The device can be used for preparing high-purity nano oxide.

Description

Technical Field

[0001] The utility model relates to the technical field of metal powder preparation, in particular to an induction arc micro-explosion metal oxide powder preparation device. Background Art

[0002] At present, the manufacturing technology of nano oxide powder is mainly based on chemical method, which has problems such as complex preparation process, high cost and low yield. The chemical method for preparing nano materials, especially the environmental pollution problem, is not suitable for large-scale application. In addition, the preparation methods of nano zinc oxide and tin oxide include graphite electrode evaporation and oxidation method, which will introduce carbon into the oxide, resulting in reduced purity of the oxide, which cannot meet the purity requirement of 4 9s and cannot meet the performance requirements of oxides in the high-tech field. Utility Model Content

[0003] In order to solve the technical problems existing in the background technology, the utility model proposes an induction arc micro-explosion metal oxide powder preparation device.

[0004] The utility model proposes an induction arc micro-explosion metal oxide powder preparation device, comprising: a pneumatic powder feeding mechanism, an oxide preparation mechanism and a cyclone separator;

[0005] The oxide preparation mechanism comprises a tank body, an induction arc reactor arranged in the tank body and a high-frequency generator arranged outside the tank body, an air inlet and a first exhaust port are opened in the middle of the top of the tank body, and a first coarse powder discharge port is opened at the bottom of the tank body;

[0006] The induction arc reactor comprises an induction coil, a cylinder, a cooling jacket, an outer ring cyclone, a central cyclone and a powder delivery pipe; the cylinder comprises a reaction section, a cooling section and a collection section arranged in sequence from top to bottom, the induction coil is arranged around the reaction section, and the induction coil is electrically connected to the high-frequency generator; the cooling jacket is arranged around the cooling section, the water inlet pipe and the water outlet pipe of the cooling jacket penetrate the tank body and extend to the outside of the tank body, a second exhaust port is opened on one side of the collection section, and the second exhaust port is connected to the first exhaust port;

[0007] The outer ring cyclone is coaxially fixed to the top of the cylinder, and the outer ring cyclone is connected to a first air inlet pipe, which extends out of the tank and is connected to an oxygen source; the central cyclone is coaxially fixed to the top of the outer ring cyclone, and the central cyclone is connected to a second air inlet pipe, which extends out of the tank and is connected to an argon source; the bottom end of the powder delivery pipe passes through the central cyclone and extends into the reaction section, and the top end of the powder delivery pipe is connected to the air inlet;

[0008] The air outlet of the pneumatic powder feeding mechanism is connected with the air inlet, and the powder feeding gas of the pneumatic powder feeding mechanism is oxygen;

[0009] The air inlet of the cyclone separator is communicated with the first exhaust port, and the fine material outlet of the cyclone separator is used for discharging nano-metal oxides.

[0010] Preferably, the first coarse powder discharge port is connected to a first powder collecting mechanism.

[0011] Preferably, a second coarse powder discharge port is provided at the bottom of the cyclone separator, and the second coarse powder discharge port is connected to a second powder collecting mechanism.

[0012] Preferably, the air inlet and the exhaust hole of the cyclone separator are connected by a stainless steel pipe.

[0013] Preferably, the stainless steel pipe is a double-layer pipe, and cooling water is provided between the layers of the double-layer pipe.

[0014] In the utility model, the induction arc micro-explosion metal oxide powder preparation device proposed has a simple structure, and does not need to use high-precision equipment and complex processes in the preparation process. The high-frequency generator, the induction gasket, and the argon gas introduced by the central cyclone form a high-temperature plasma flame flow core area in the reaction section, and the metal powder and oxygen sprayed through the powder delivery pipe and the oxygen passed through the outer ring cyclone react in the high-temperature plasma flame flow core area to form nano oxides. Moreover, since no additional elements are introduced in this embodiment, the product purity is very high, and a nano oxide with a purity of 99.99% can be prepared. BRIEF DESCRIPTION OF THE DRAWINGS

[0015] Figure 1 It is a structural schematic diagram of an induction arc reactor in an embodiment of the utility model. DETAILED DESCRIPTION

[0016] It should be noted that, in the absence of conflict, the embodiments and features of the embodiments of the present invention can be combined with each other. The present invention will be described in detail below with reference to the accompanying drawings and in combination with the embodiments.

[0017] Reference Figure 1 The utility model proposes an induction arc micro-explosion metal oxide powder preparation device, comprising: a pneumatic powder feeding mechanism, an oxide preparation mechanism and a cyclone separator;

[0018] The oxide preparation mechanism comprises a tank body, an induction arc reactor arranged in the tank body and a high-frequency generator arranged outside the tank body, an air inlet and a first exhaust port are opened in the middle of the top of the tank body, and a first coarse powder discharge port is opened at the bottom of the tank body;

[0019] The induction arc reactor comprises an induction coil 2, a cylinder 1, a cooling jacket 6, an outer ring cyclone 3, a central cyclone 4 and a powder delivery pipe 5; the cylinder 1 comprises a reaction section 11, a cooling section 12 and a collection section 13 arranged in sequence from top to bottom, the induction coil 2 is arranged around the reaction section 11, and the induction coil 2 is electrically connected to the high-frequency generator; the cooling jacket 6 is arranged around the cooling section 12, the water inlet pipe and the water outlet pipe of the cooling jacket 6 penetrate the tank body and extend to the outside of the tank body, and a second exhaust port is opened on one side of the collection section 13, and the second exhaust port is connected to the first exhaust port;

[0020] The outer ring cyclone 3 is coaxially fixed to the top of the cylinder 1, and the outer ring cyclone 3 is connected to a first air inlet pipe, which extends out of the tank body and is connected to an oxygen source; the central cyclone 4 is coaxially fixed to the top of the outer ring cyclone 3, and the central cyclone 4 is connected to a second air inlet pipe, which extends out of the tank body and is connected to an argon source; the bottom end of the powder delivery pipe 5 passes through the central cyclone 4 and extends into the reaction section 11, and the top end of the powder delivery pipe 5 is connected to the air inlet;

[0021] The air outlet of the pneumatic powder feeding mechanism is connected with the air inlet, and the powder feeding gas of the pneumatic powder feeding mechanism is oxygen;

[0022] The air inlet of the cyclone separator is communicated with the first exhaust port, and the fine material outlet of the cyclone separator is used for discharging nano-metal oxides.

[0023] The utility model has a simple structure, and does not require the use of high-precision equipment and complex processes during the preparation process. The high-frequency generator, the induction gasket, and the argon gas introduced by the central cyclone 4 form a high-temperature plasma flame flow core area in the reaction section 11, and the metal powder and oxygen injected through the powder delivery pipe 5 and the oxygen passing through the outer ring cyclone 3 are subjected to explosion reaction in the high-temperature plasma flame flow core area to form nano oxides. Moreover, since no additional elements are introduced in this embodiment, the product purity is very high, and nano oxides with a purity of 99.99% can be prepared.

[0024] In this embodiment, the first coarse powder discharge port is connected to a first powder collecting mechanism to recover powder with large particle size due to insufficient reaction or failure to explode.

[0025] In this embodiment, a second coarse powder discharge port is provided at the bottom of the cyclone separator, and the second coarse powder discharge port is connected to a second powder collecting mechanism to recover the separated powder with large particle size.

[0026] In this embodiment, the air inlet and the exhaust hole of the cyclone separator are connected by a stainless steel pipe, so that the gas extracted by the cyclone separator and the nano-oxides in the gas can quickly dissipate heat.

[0027] In a further embodiment, the stainless steel tube is a double-layer tube, and cooling water is provided between the layers of the double-layer tube to further accelerate heat dissipation.

[0028] The above description is only a preferred specific implementation manner of the present invention, but the protection scope of the present invention is not limited thereto. Any technician familiar with the technical field can make equivalent replacements or changes within the technical scope disclosed by the present invention according to the technical scheme and the utility model concept of the present invention, which should be covered by the protection scope of the present invention.

Claims

1. An induction arc micro-explosion metal oxide powder preparation device, characterized in that: include: Pneumatic powder feeding mechanism, oxide preparation mechanism and cyclone separator; The oxide preparation mechanism comprises a tank body, an induction arc reactor arranged in the tank body and a high-frequency generator arranged outside the tank body, an air inlet and a first exhaust port are provided in the middle of the top of the tank body, and a first coarse powder discharge port is provided at the bottom of the tank body; The induction arc reactor comprises an induction coil (2), a cylinder (1), a cooling jacket (6), an outer ring cyclone (3), a central cyclone (4) and a powder delivery pipe (5); the cylinder (1) comprises a reaction section (11), a cooling section (12) and a collection section (13) which are arranged in sequence from top to bottom; the induction coil (2) is arranged around the reaction section (11), and the induction coil (2) is electrically connected to a high-frequency generator; the cooling jacket (6) is arranged around the cooling section (12), a water inlet pipe and a water outlet pipe of the cooling jacket (6) penetrate the tank body and extend outside the tank body; a second exhaust port is opened on one side of the collection section (13), and the second exhaust port is connected to the first exhaust port; The outer ring cyclone (3) is coaxially fixed to the top of the cylinder (1), and the outer ring cyclone (3) is connected to a first air inlet pipe, which extends out of the tank body and is connected to an oxygen source; the central cyclone (4) is coaxially fixed to the top of the outer ring cyclone (3), and the central cyclone (4) is connected to a second air inlet pipe, which extends out of the tank body and is connected to an argon source; the bottom end of the powder delivery pipe (5) passes through the central cyclone (4) and extends into the reaction section (11), and the top end of the powder delivery pipe (5) is connected to the air inlet; The air outlet of the pneumatic powder feeding mechanism is connected with the air inlet, and the powder feeding gas of the pneumatic powder feeding mechanism is oxygen; The air inlet of the cyclone separator is communicated with the first exhaust port, and the fine material outlet of the cyclone separator is used for discharging nano-metal oxides.

2. The induction arc micro-explosion metal oxide powder preparation device according to claim 1, characterized in that: The first coarse powder discharge port is connected to a first powder collecting mechanism.

3. The induction arc micro-explosion metal oxide powder preparation device according to claim 1, characterized in that: A second coarse powder discharge port is provided at the bottom of the cyclone separator, and the second coarse powder discharge port is connected to a second powder collecting mechanism.

4. The induction arc micro-explosion metal oxide powder preparation device according to claim 1, characterized in that: The air inlet and the exhaust hole of the cyclone separator are connected through a stainless steel pipe.

5. The induction arc micro-explosion metal oxide powder preparation device according to claim 4, characterized in that: The stainless steel pipe is a double-layer pipe with cooling water between the layers.

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