CN111495298A - Plasma arc magnetic force rotary gasification powder making furnace - Google Patents
Plasma arc magnetic force rotary gasification powder making furnace Download PDFInfo
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- CN111495298A CN111495298A CN202010414972.0A CN202010414972A CN111495298A CN 111495298 A CN111495298 A CN 111495298A CN 202010414972 A CN202010414972 A CN 202010414972A CN 111495298 A CN111495298 A CN 111495298A
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- 239000000843 powder Substances 0.000 title claims abstract description 69
- 238000002309 gasification Methods 0.000 title claims abstract description 36
- 239000000428 dust Substances 0.000 claims abstract description 63
- OKTJSMMVPCPJKN-UHFFFAOYSA-N Carbon Chemical compound [C] OKTJSMMVPCPJKN-UHFFFAOYSA-N 0.000 claims abstract description 56
- 229910002804 graphite Inorganic materials 0.000 claims abstract description 56
- 239000010439 graphite Substances 0.000 claims abstract description 56
- 230000007246 mechanism Effects 0.000 claims description 39
- 229910001220 stainless steel Inorganic materials 0.000 claims description 4
- 239000010935 stainless steel Substances 0.000 claims description 4
- 230000037237 body shape Effects 0.000 claims description 3
- 230000003647 oxidation Effects 0.000 abstract description 14
- 238000007254 oxidation reaction Methods 0.000 abstract description 14
- 239000002893 slag Substances 0.000 abstract description 8
- 239000002245 particle Substances 0.000 abstract description 4
- 239000002184 metal Substances 0.000 description 13
- 229910052751 metal Inorganic materials 0.000 description 13
- 238000009413 insulation Methods 0.000 description 9
- 239000002994 raw material Substances 0.000 description 8
- 230000003028 elevating effect Effects 0.000 description 7
- 238000002844 melting Methods 0.000 description 5
- 230000008018 melting Effects 0.000 description 5
- 238000000034 method Methods 0.000 description 4
- 230000008569 process Effects 0.000 description 4
- 230000015572 biosynthetic process Effects 0.000 description 3
- 238000010891 electric arc Methods 0.000 description 3
- 238000004519 manufacturing process Methods 0.000 description 3
- 239000000463 material Substances 0.000 description 3
- XEEYBQQBJWHFJM-UHFFFAOYSA-N Iron Chemical group [Fe] XEEYBQQBJWHFJM-UHFFFAOYSA-N 0.000 description 2
- 230000009471 action Effects 0.000 description 2
- 230000009286 beneficial effect Effects 0.000 description 2
- 238000009792 diffusion process Methods 0.000 description 2
- 238000005265 energy consumption Methods 0.000 description 2
- 230000003628 erosive effect Effects 0.000 description 2
- 239000007788 liquid Substances 0.000 description 2
- 239000007769 metal material Substances 0.000 description 2
- 230000005855 radiation Effects 0.000 description 2
- 230000008859 change Effects 0.000 description 1
- 238000004140 cleaning Methods 0.000 description 1
- 239000012141 concentrate Substances 0.000 description 1
- 238000001816 cooling Methods 0.000 description 1
- 238000005520 cutting process Methods 0.000 description 1
- 230000007547 defect Effects 0.000 description 1
- 230000000694 effects Effects 0.000 description 1
- 239000000284 extract Substances 0.000 description 1
- 230000002349 favourable effect Effects 0.000 description 1
- 238000007667 floating Methods 0.000 description 1
- 239000011344 liquid material Substances 0.000 description 1
- 230000005426 magnetic field effect Effects 0.000 description 1
- 238000010309 melting process Methods 0.000 description 1
- 238000012986 modification Methods 0.000 description 1
- 230000004048 modification Effects 0.000 description 1
- 230000001590 oxidative effect Effects 0.000 description 1
- 238000004663 powder metallurgy Methods 0.000 description 1
- 238000002360 preparation method Methods 0.000 description 1
- 238000004886 process control Methods 0.000 description 1
- 230000000087 stabilizing effect Effects 0.000 description 1
- 238000006467 substitution reaction Methods 0.000 description 1
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B01—PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
- B01J—CHEMICAL OR PHYSICAL PROCESSES, e.g. CATALYSIS OR COLLOID CHEMISTRY; THEIR RELEVANT APPARATUS
- B01J19/00—Chemical, physical or physico-chemical processes in general; Their relevant apparatus
- B01J19/08—Processes employing the direct application of electric or wave energy, or particle radiation; Apparatus therefor
- B01J19/087—Processes employing the direct application of electric or wave energy, or particle radiation; Apparatus therefor employing electric or magnetic energy
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B01—PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
- B01J—CHEMICAL OR PHYSICAL PROCESSES, e.g. CATALYSIS OR COLLOID CHEMISTRY; THEIR RELEVANT APPARATUS
- B01J6/00—Heat treatments such as Calcining; Fusing ; Pyrolysis
- B01J6/005—Fusing
- B01J6/007—Fusing in crucibles
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B82—NANOTECHNOLOGY
- B82Y—SPECIFIC USES OR APPLICATIONS OF NANOSTRUCTURES; MEASUREMENT OR ANALYSIS OF NANOSTRUCTURES; MANUFACTURE OR TREATMENT OF NANOSTRUCTURES
- B82Y40/00—Manufacture or treatment of nanostructures
-
- C—CHEMISTRY; METALLURGY
- C01—INORGANIC CHEMISTRY
- C01B—NON-METALLIC ELEMENTS; COMPOUNDS THEREOF; METALLOIDS OR COMPOUNDS THEREOF NOT COVERED BY SUBCLASS C01C
- C01B13/00—Oxygen; Ozone; Oxides or hydroxides in general
- C01B13/14—Methods for preparing oxides or hydroxides in general
- C01B13/20—Methods for preparing oxides or hydroxides in general by oxidation of elements in the gaseous state; by oxidation or hydrolysis of compounds in the gaseous state
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B01—PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
- B01J—CHEMICAL OR PHYSICAL PROCESSES, e.g. CATALYSIS OR COLLOID CHEMISTRY; THEIR RELEVANT APPARATUS
- B01J2219/00—Chemical, physical or physico-chemical processes in general; Their relevant apparatus
- B01J2219/08—Processes employing the direct application of electric or wave energy, or particle radiation; Apparatus therefor
- B01J2219/0803—Processes employing the direct application of electric or wave energy, or particle radiation; Apparatus therefor employing electric or magnetic energy
- B01J2219/085—Processes employing the direct application of electric or wave energy, or particle radiation; Apparatus therefor employing electric or magnetic energy creating magnetic fields
- B01J2219/0854—Processes employing the direct application of electric or wave energy, or particle radiation; Apparatus therefor employing electric or magnetic energy creating magnetic fields employing electromagnets
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B01—PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
- B01J—CHEMICAL OR PHYSICAL PROCESSES, e.g. CATALYSIS OR COLLOID CHEMISTRY; THEIR RELEVANT APPARATUS
- B01J2219/00—Chemical, physical or physico-chemical processes in general; Their relevant apparatus
- B01J2219/08—Processes employing the direct application of electric or wave energy, or particle radiation; Apparatus therefor
- B01J2219/0894—Processes carried out in the presence of a plasma
Abstract
The invention provides a plasma arc magnetic force rotary gasification powder making furnace, which comprises a crucible, a dust collection cover, a magnetic coil, a first electrode, a second graphite electrode, a direct current voltage output device and an air draft device, wherein the dust collection cover is arranged on the crucible; the dust collection cover is arranged on one side of the opening of the crucible and is communicated with a pipeline of the air draft device, a gap is reserved between the dust collection cover and the opening of the crucible, the first electrode and the second graphite electrode are arranged on one side of the concave surface of the dust collection cover and in a space surrounded by the crucible, the first electrode and the second graphite electrode are electrically connected with the direct current voltage output device, the magnetic force coil surrounds the outer side of the crucible, and a circuit formed by the first electrode and the second graphite electrode is connected with the magnetic force coil in series or in parallel; according to the powder making furnace, the magnetic coil is arranged outside the crucible, the generated rotating magnetic field enables the plasma arc to be more stable, the energy is more concentrated, the influence of an oxidation layer and oxidation slag on the product quality is effectively avoided, and the uniformity of the particle size of the nano-scale oxidation powder is improved.
Description
Technical Field
The invention relates to the technical field of powder metallurgy, in particular to a plasma arc magnetic force rotary gasification powder making furnace.
Background
The nanotechnology is a big support for the current social and economic development, the requirement of the research and the development of a nanometer product on production equipment is higher, the existing gasification powder making furnace can generate an oxidation layer and oxidation slag in the furnace body in the metal melting process, the oxidation layer and the oxidation slag can float on the surface of metal melt, the capacity of the gasification powder making furnace can be reduced, the quality of the product can be reduced, and the uniformity of the particle size of the product is reduced.
Disclosure of Invention
The invention aims to overcome the defects in the prior art and provide a plasma arc magnetic force rotary gasification powder making furnace.
In order to achieve the purpose, the invention adopts the technical scheme that: a plasma arc magnetic force rotary gasification powder making furnace comprises a crucible, a dust collection cover, a magnetic coil, a first electrode, a second graphite electrode, a direct current voltage output device and an air draft device;
the dust collection cover is communicated with the air draft device through a pipeline, the dust collection cover is in a concave cover body shape, the dust collection cover is arranged on one side of an opening of the crucible, a gap is reserved between the dust collection cover and the opening of the crucible, one side of a concave surface of the dust collection cover faces the opening of the crucible, a certain distance is reserved between the first electrode and the second graphite electrode, the first electrode and the second graphite electrode are arranged on one side of the concave surface of the dust collection cover and in a space surrounded by the crucible, the first electrode and the second graphite electrode are electrically connected with the direct current voltage output device, the magnetic coil surrounds the outer side of the crucible, and the magnetic coil is connected in series in a circuit formed by the first electrode and the second graphite electrode or in parallel with a circuit formed by the first electrode and the second graphite electrode.
The plasma arc magnetic force rotation gasification powder making furnace utilizes a first electrode and a second graphite electrode to contact with a metal raw material to form a closed circuit, voltage output from the first electrode and the second graphite electrode by a direct current voltage output device generates direct current plasma electric arc, high-temperature heat at about 3000 ℃ is further generated to burn, melt and gasify the metal raw material put in a crucible, the gasified metal raw material is continuously oxidized and cooled to form nanoscale oxide powder after floating in the air draft process of a dust hood, the plasma arc magnetic force rotation gasification powder making furnace is provided with a magnetic coil, the magnetic coil is wound along the crucible and is connected in series or in parallel in a circuit formed by the first electrode and the second graphite electrode to generate a rotating magnetic field, and solution in a crucible molten pool is driven to run along a certain direction under the magnetic force action of the rotating magnetic field, the formation of the oxidation layer on the surface of the molten pool can be effectively eliminated, the energy of the plasma arc of the low-voltage plasma arc is more concentrated and more stable under the action of the rotating magnetic field, so that the product quality is more stable, the uniformity of the particle size of the nano-scale oxide powder is improved, the equipment is more energy-saving, the productivity is effectively improved, and the metal solution can also arrange the oxidation slag to the edge of the melting crucible along with the rotation of the magnetic force, thereby being beneficial to removing the oxidation slag and improving the productivity.
More preferably, the magnetic coil is connected in series in the circuit formed by the first electrode and the second graphite electrode.
According to the plasma arc magnetic force rotary gasification powder making furnace, the magnetic coil is connected in series in the circuit formed by the first electrode and the second graphite electrode, after the first electrode and the second graphite electrode are in contact with the metal raw material to form a closed circuit and generate current, the magnetic coil also generates current and a rotary magnetic field, the magnetic coil, the first electrode and the second graphite electrode synchronously run, and the product quality is improved.
Preferably, the distance between the dust collection cover and the opening of the crucible can be adjusted, and the distance between the first graphite electrode and the second graphite electrode can be adjusted.
Preferably, the powder making furnace further comprises a servo motor, the distance between the dust collection cover and the opening of the crucible is controlled by the servo motor, and the distance between the first electrode and the second graphite electrode is controlled by the servo motor.
During the working process of the powder making furnace, due to the contact short circuit between the electrode and the furnace burden, the furnace burden is melted and collapsed, the arc length, the arc voltage, the arc current and the input power are constantly changed, and the distance between the first electrode and the second graphite electrode is controlled and adjusted by the plasma arc magnetic force rotary gasification powder making furnace through the servo motor, so that the set voltage of the electric furnace is kept constant to a greater extent, the melting time is favorably shortened, the interference of the arc change is reduced, the loss of the electrode and the influence of the arc radiation on the electric erosion of the crucible can be reduced, and the productivity is greatly improved.
Preferably, the powder making furnace further comprises a heat insulation sleeve and a powder making furnace shell, the heat insulation sleeve is arranged on the outer side of the magnetic coil, the heat insulation sleeve surrounds the magnetic coil and the crucible except for the opening side of the crucible, and the powder making furnace shell surrounds the heat insulation sleeve.
The plasma arc magnetic force rotary gasification powder making furnace reduces the diffusion of heat to the environment through the heat insulation sleeve, and reduces energy consumption.
Preferably, the dust collection cover is in a spherical shell shape, or a conical shell shape, or a combination shape of the conical shell and the hollow cylinder.
Preferably, the crucible is a stainless steel crucible, and the crucible has an outer shape of an inverted truncated cone or a cylinder.
Preferably, the air extracting device is a fan or a dust collector.
The plasma arc magnetic force rotary gasification powder making furnace extracts gasified metal from the upper part of the crucible through the air draft device and the dust collection cover, and then carries out oxidation cutting and cooling to form nano-scale oxidized powder.
Preferably, the dc voltage output device is a transformer or a dc power supply.
The powder making furnace directly transmits voltage to the first electrode, the second graphite electrode and the magnetic coil through a direct current power supply, or transmits voltage to the first electrode, the second graphite electrode and the magnetic coil through a transformer connected to a power grid.
Preferably, the direct current power supply is an IGBT inverter direct current power supply.
The plasma arc magnetic force rotary gasification powder making furnace adopts an IGBT inversion direct current power supply, the number of turns of an iron core and a coil of a power transformer is greatly reduced, metal materials are saved, the overall dimension and the weight of the powder making furnace are reduced, and the loss of electric energy is reduced.
Preferably, the powder making furnace further comprises a base, the crucible opening is upwards fixed on the base, the first electrode is arranged at the bottom of the crucible, and the second graphite electrode penetrates through the dust collection cover and is inserted into the crucible.
Preferably, the powder making furnace further comprises a lifting mechanism, the bottom of the lifting mechanism is fixed on the base, the dust collection cover and the second graphite electrode are detachably fixed on the lifting mechanism, and the height of the lifting mechanism is controlled by a servo motor.
Preferably, the lifting mechanism is a cylinder, a hydraulic cylinder or a screw lifter.
The dust collection cover is arranged on the outer wall of the crucible, the dust collection cover is arranged on the inner wall of the crucible, the dust collection cover is arranged on the outer wall of the crucible, and the dust collection cover is arranged on the inner wall of the crucible.
Preferably, elevating system includes first elevating system and second elevating system, servo motor includes first servo motor and second servo motor, first elevating system's height passes through first servo motor control, second elevating system's height passes through second servo motor control, the dust cage is fixed on first elevating system, second graphite electrode can be dismantled and be fixed in on the second elevating system.
Preferably, an electrode clamping mechanism is fixed on the upper portion of the first lifting mechanism, the second graphite electrode is detachably fixed on the electrode clamping mechanism, a supporting rod is fixed on the upper portion of the second lifting mechanism, and the dust collection cover is fixed on the supporting rod.
The plasma arc magnetic force rotary gasification powder making furnace respectively controls the distance between the dust collection cover and the crucible and the distance between the first electrode and the second graphite electrode through different servo motors.
Preferably, the powder making furnace is further provided with a feeding port leading into the crucible, and the powder making furnace is further provided with an observation window.
The plasma arc magnetic force rotary gasification powder making furnace observes the liquid level in the crucible through the observation window and feeds materials into the crucible through the feeding port.
The invention has the beneficial effects that: the invention provides a plasma arc magnetic force rotary gasification powder making furnace, which has the following advantages:
(1) the distance between the first electrode and the second graphite electrode is adjusted by driving the servo motor to operate, so that the set voltage of the electric furnace is kept constant to a greater extent, and the stability of product quality and productivity is achieved;
(2) the magnetic coil is arranged outside the crucible, the generated rotating magnetic field enables the plasma arc to be more stable, the energy is more concentrated, and the liquid material in the crucible molten pool rotates along with the direction of the rotating magnetic field, so that the formation of an oxide layer on the surface of the molten pool is effectively avoided, and a small amount of oxidizing slag generated in the production process can be discharged and rotated around the crucible wall of the crucible while the solution rotates, so that the cleaning is convenient, and the productivity can be improved;
(3) the constancy of the air suction volume is controlled by adjusting the height of the air suction hood through the operation of the driving servo motor, so that the process control of stabilizing the air volume is achieved, the stability of the production process is effectively ensured, the plasma arc magnetic force rotary gasification powder making furnace can continuously operate, and the quality and the productivity of products are effectively controlled;
(4) the plasma arc magnetic force rotary gasification powder making furnace provided by the invention has the advantages of easiness in control of melting temperature, small occupied area of equipment, low power consumption, capability of improving the capacity and suitability for preparation of metal nano-scale oxide powder.
Drawings
FIG. 1 is a schematic structural view of a plasma arc magnetic rotary gasification powder making furnace of the present invention.
FIG. 2 is a schematic view of a partial structure of the plasma arc magnetic rotary gasification powder making furnace of the present invention.
The device comprises a crucible 1, a crucible 2, a dust collection cover 3, a magnetic coil 4, a first electrode 5, a second graphite electrode 6, a powder making furnace shell 7, a machine base 8, a first lifting mechanism 9, a second lifting mechanism 10, a first servo motor 11, a second servo motor 12, an electrode clamping mechanism 13, a support rod 14, a feeding port 15 and an observation window.
Detailed Description
To better illustrate the objects, aspects and advantages of the present invention, the present invention will be further described with reference to specific examples.
Example 1
As shown in fig. 1 and 2, the plasma arc magnetic force rotary gasification powder making furnace according to the embodiment of the present invention includes a crucible 1, a dust collection cover 2, a magnetic coil 3, a first electrode 4, a second graphite electrode 5, a direct current voltage output device, and an air draft device;
the dust collection cover 2 is communicated with a pipeline of an air draft device, the dust collection cover 2 is in a concave cover body shape, the dust collection cover 2 is arranged on one side of an opening of the crucible 1, a gap is reserved between the dust collection cover 2 and the opening of the crucible 1, one side of a concave surface of the dust collection cover 2 faces the opening of the crucible 1, a certain distance is reserved between the first electrode 4 and the second graphite electrode 5, the first electrode 4 and the second graphite electrode 5 are arranged on one side of the concave surface of the dust collection cover 2 and in a space surrounded by the crucible 1, the first electrode 4 and the second graphite electrode 5 are electrically connected with a direct-current voltage output device, the magnetic coil 3 surrounds the outer side of the crucible 1, and the magnetic coil 3 is connected in series in a circuit formed by the first electrode 4 and the second graphite electrode 5 or the magnetic coil 3 is connected in parallel with a circuit formed by the first electrode 4 and the second graphite.
Further, the magnetic coil 3 is connected in series in the circuit composed of the first electrode 4 and the second graphite electrode 5. The magnetic coil 3 is connected in series in a circuit formed by the first electrode 4 and the second graphite electrode 5, and after the first electrode 4 and the second graphite electrode 5 are contacted with metal raw materials to form a closed circuit and generate current, the magnetic coil 3 also generates current and a rotating magnetic field, so that the magnetic coil 3, the first electrode 4 and the second graphite electrode 5 synchronously run, and the product quality is improved.
Furthermore, the powder making furnace also comprises a servo motor, the distance between the dust collection cover and the crucible 1 is controlled by the servo motor, and the distance between the first electrode 4 and the second graphite electrode 5 is controlled by the servo motor. During the working process of the powder making furnace, due to the contact short circuit between the electrode and the furnace burden, the furnace burden is melted and collapsed, the arc length, the arc voltage, the arc current and the input power are constantly changed, and the distance between the first electrode and the second graphite electrode is controlled and adjusted by the plasma arc magnetic force rotary gasification powder making furnace through the servo motor, so that the set voltage of the electric furnace is kept constant to a greater extent, the melting time is favorably shortened, the interference of the electric arc on a power grid is reduced, the loss of the electrode and the influence of the electric arc radiation on the electric erosion of the crucible are reduced, and the productivity is greatly improved.
In order to reduce the diffusion of heat to the environment and reduce the energy consumption, the powder making furnace also comprises a heat insulation sleeve and a powder making furnace shell 6, wherein the heat insulation sleeve is arranged outside the magnetic coil 3, the heat insulation sleeve surrounds the magnetic coil 3 and the crucible 1 except the opening side of the crucible, and the powder making furnace shell 6 surrounds the heat insulation sleeve.
Further, the dust collection cover 2 is in a spherical shell shape, or a conical shell shape, or a combination shape of the conical shell and the hollow cylinder, the crucible 1 is a stainless steel crucible, and the crucible is in an inverted truncated cone shape or a cylindrical shape.
Further, the air exhaust device is a fan or a dust collector.
Further, the direct current voltage output device is a transformer or a direct current power supply.
Further, the direct current power supply is an IGBT inversion direct current power supply. The IGBT inversion direct-current power supply is selected, the number of turns of an iron core and a coil of the power transformer is greatly reduced, metal materials are saved, the overall dimension and the weight of the powder making furnace are reduced, and the loss of electric energy is reduced.
Furthermore, the powder making furnace also comprises a base 7, the opening of the crucible 1 is upwards fixed on the base 7, the first electrode 4 is arranged at the bottom of the crucible 1, and the second graphite electrode 5 penetrates through the dust collection cover 2 and is inserted into the crucible 1.
Further, the crucible 1 is a stainless steel crucible.
Furthermore, the powder making furnace also comprises a lifting mechanism, the bottom of the lifting mechanism is fixed on the machine base, an electrode clamping mechanism and a supporting rod are fixed on the upper part of the lifting mechanism, the dust collecting cover is fixed on the supporting rod, the second graphite electrode is detachably fixed on the electrode clamping mechanism, the height of the lifting mechanism is controlled by a servo motor, and the lifting mechanism is an air cylinder, a hydraulic cylinder or a screw rod lifter. The dust collection cover is arranged on the outer wall of the crucible, the dust collection cover is arranged on the inner wall of the crucible, the dust collection cover is arranged on the outer wall of the crucible, and the dust collection cover is arranged on the inner wall of the crucible.
In order to respectively control the distance between the dust collection cover 2 and the opening of the crucible 1 and the distance between the first electrode 4 and the second graphite electrode 5, the lifting mechanism comprises a first lifting mechanism 8 and a second lifting mechanism 9, the servo motor comprises a first servo motor 10 and a second servo motor 11, the height of the first lifting mechanism 8 is controlled by the first servo motor 10, the height of the second lifting mechanism 9 is controlled by the second servo motor 11, the upper part of the first lifting mechanism 8 is fixed with an electrode clamping mechanism 12, the second graphite electrode 5 is detachably fixed on the electrode clamping mechanism 12, the upper part of the second lifting mechanism 9 is fixed with a support rod 13, and the dust collection cover 2 is fixed on the support rod 13.
Furthermore, the powder making furnace is also provided with a feeding port 14 leading into the crucible 1, and the powder making furnace is also provided with an observation window 15. The liquid level in the crucible is observed through the observation window, and the material is fed into the crucible through the feeding port.
The plasma arc magnetic force rotary gasification powder making furnace provided by the invention utilizes high-temperature heat of about 3000 ℃ generated by direct current plasma arc generated between an electrode and a metal raw material to burn, melt and gasify the metal raw material put in a crucible, and the gasified metal raw material floated in the air is continuously oxidized, cooled and floated in a dust collection cover in the air draft process of the dust collection cover to form nano-scale oxidized powder which is absorbed into a settling chamber and a dust collection device for dust collection along with an air draft pipeline. Foretell rotatory gasification system powder stove of plasma arc magnetic force is provided with magnetic coil, magnetic coil winds along the crucible, establish ties in the circuit, produce rotating magnetic field, under rotating magnetic field's magnetic force effect, solution operates along certain direction in the drive crucible molten bath, can effectively eliminate the formation of molten bath surface oxide layer, make low pressure plasma arc more concentrate the more stable of arc post energy under rotating magnetic field's effect, thereby make product quality more stable, the homogeneity of nanometer oxidation powder particle diameter has been promoted, equipment is more energy-conserving, the productivity has effectively been improved, and solution can also arrange the edge of revolving to the melting material crucible to the oxidation slag along with magnetic force is rotatory, be favorable to cleaing away the oxidation slag and improve the productivity.
Finally, it should be noted that the above embodiments are only used for illustrating the technical solutions of the present invention and not for limiting the protection scope of the present invention, and although the present invention is described in detail with reference to the preferred embodiments, it should be understood by those skilled in the art that modifications or equivalent substitutions can be made on the technical solutions of the present invention without departing from the spirit and scope of the technical solutions of the present invention.
Claims (10)
1. A plasma arc magnetic force rotary gasification powder making furnace is characterized by comprising a crucible, a dust collection cover, a magnetic coil, a first electrode, a second graphite electrode, a direct current voltage output device and an air draft device;
the dust collection cover is communicated with the air draft device through a pipeline, the dust collection cover is in a concave cover body shape, the dust collection cover is arranged on one side of an opening of the crucible, a gap is reserved between the dust collection cover and the opening of the crucible, one side of a concave surface of the dust collection cover faces the opening of the crucible, a certain distance is reserved between the first electrode and the second graphite electrode, the first electrode and the second graphite electrode are arranged on one side of the concave surface of the dust collection cover and in a space surrounded by the crucible, the first electrode and the second graphite electrode are electrically connected with the direct current voltage output device, the magnetic force coil surrounds the outer side of the crucible, and the magnetic force coil is connected in series in a circuit formed by the first electrode and the second graphite electrode or in parallel with a circuit formed by the first electrode and the second graphite electrode.
2. The plasma arc magnetic force rotary gasification powder making furnace according to claim 1, further comprising a servo motor, wherein the distance between the dust collection cover and the opening of the crucible is controlled by the servo motor, and the distance between the first electrode and the second graphite electrode is controlled by the servo motor.
3. The plasma arc magnetic force rotary gasification powder making furnace according to claim 1 or 2, further comprising a heat insulating sleeve and a powder making furnace shell, wherein the heat insulating sleeve is arranged outside the magnetic coil, the heat insulating sleeve surrounds the magnetic coil and the crucible except for the opening side of the crucible, and the powder making furnace shell surrounds the heat insulating sleeve.
4. The plasma arc magnetic rotating gasification powder making furnace according to claim 3, wherein the dust collection cover is in a spherical shell shape, or a conical shell shape, or a combination shape of the conical shell and the hollow cylinder.
5. The plasma arc magnetic force rotary gasification powder making furnace according to claim 3, wherein the crucible is a stainless steel crucible, and the outer shape of the crucible is an inverted truncated cone shape or a cylindrical shape.
6. The plasma arc magnetic force rotary gasification powder making furnace according to claim 1, wherein the air draft device is a fan or a dust collector.
7. The plasma arc magnetic force rotary gasification powder making furnace according to claim 1, further comprising a base, wherein the crucible opening is fixed on the base upwards, the first electrode is arranged at the bottom of the crucible, and the second graphite electrode is inserted into the crucible through the dust collection cover.
8. The plasma arc magnetic force rotary gasification powder making furnace according to claim 7, further comprising a lifting mechanism, wherein the bottom of the lifting mechanism is fixed on the base, the dust collection cover and the second graphite electrode are detachably fixed on the lifting mechanism, and the height of the lifting mechanism is controlled by a servo motor.
9. The plasma arc magnetic force rotary gasification powder making furnace according to claim 8, wherein the lifting mechanism comprises a first lifting mechanism and a second lifting mechanism, the servo motor comprises a first servo motor and a second servo motor, the height of the first lifting mechanism is controlled by the first servo motor, the height of the second lifting mechanism is controlled by the second servo motor, the dust collection cover is fixed on the first lifting mechanism, and the second graphite electrode is detachably fixed on the second lifting mechanism.
10. The plasma arc magnetic rotating gasification powder making furnace according to claim 1, wherein the powder making furnace is further provided with a feeding port leading into the crucible.
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| Application Number | Priority Date | Filing Date | Title |
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| CN202010414972.0A CN111495298A (en) | 2020-05-15 | 2020-05-15 | Plasma arc magnetic force rotary gasification powder making furnace |
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| Application Number | Priority Date | Filing Date | Title |
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| CN202010414972.0A CN111495298A (en) | 2020-05-15 | 2020-05-15 | Plasma arc magnetic force rotary gasification powder making furnace |
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| CN111495298A true CN111495298A (en) | 2020-08-07 |
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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN114603151A (en) * | 2022-03-28 | 2022-06-10 | 中国科学院合肥物质科学研究院 | Field-controlled plasma ultra-fine metal powder preparation furnace |
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2020
- 2020-05-15 CN CN202010414972.0A patent/CN111495298A/en active Pending
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN114603151A (en) * | 2022-03-28 | 2022-06-10 | 中国科学院合肥物质科学研究院 | Field-controlled plasma ultra-fine metal powder preparation furnace |
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