CN117867296A - Device and method for preparing magnesium by hydrogen plasma reduction - Google Patents
Device and method for preparing magnesium by hydrogen plasma reduction Download PDFInfo
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- CN117867296A CN117867296A CN202311786951.1A CN202311786951A CN117867296A CN 117867296 A CN117867296 A CN 117867296A CN 202311786951 A CN202311786951 A CN 202311786951A CN 117867296 A CN117867296 A CN 117867296A
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- 239000011777 magnesium Substances 0.000 title claims abstract description 56
- 229910052749 magnesium Inorganic materials 0.000 title claims abstract description 55
- FYYHWMGAXLPEAU-UHFFFAOYSA-N Magnesium Chemical compound [Mg] FYYHWMGAXLPEAU-UHFFFAOYSA-N 0.000 title claims abstract description 54
- UFHFLCQGNIYNRP-UHFFFAOYSA-N Hydrogen Chemical compound [H][H] UFHFLCQGNIYNRP-UHFFFAOYSA-N 0.000 title claims abstract description 48
- 239000001257 hydrogen Substances 0.000 title claims abstract description 48
- 229910052739 hydrogen Inorganic materials 0.000 title claims abstract description 48
- 238000000034 method Methods 0.000 title claims abstract description 37
- 230000009467 reduction Effects 0.000 title claims abstract description 37
- 238000003723 Smelting Methods 0.000 claims abstract description 45
- 239000002699 waste material Substances 0.000 claims abstract description 11
- 238000010438 heat treatment Methods 0.000 claims abstract description 10
- 238000007789 sealing Methods 0.000 claims abstract description 8
- 230000000149 penetrating effect Effects 0.000 claims abstract description 4
- CPLXHLVBOLITMK-UHFFFAOYSA-N magnesium oxide Inorganic materials [Mg]=O CPLXHLVBOLITMK-UHFFFAOYSA-N 0.000 claims description 42
- 239000000395 magnesium oxide Substances 0.000 claims description 29
- AXZKOIWUVFPNLO-UHFFFAOYSA-N magnesium;oxygen(2-) Chemical compound [O-2].[Mg+2] AXZKOIWUVFPNLO-UHFFFAOYSA-N 0.000 claims description 16
- 238000006243 chemical reaction Methods 0.000 claims description 7
- 239000002994 raw material Substances 0.000 claims description 7
- 239000002245 particle Substances 0.000 claims description 5
- 239000007787 solid Substances 0.000 claims description 4
- 238000001354 calcination Methods 0.000 claims description 3
- 239000003575 carbonaceous material Substances 0.000 claims description 3
- 238000005507 spraying Methods 0.000 claims description 3
- 210000002381 plasma Anatomy 0.000 abstract description 57
- 238000004519 manufacturing process Methods 0.000 abstract description 11
- 230000008901 benefit Effects 0.000 abstract description 6
- 238000005265 energy consumption Methods 0.000 abstract description 5
- 239000007921 spray Substances 0.000 abstract description 4
- 238000006722 reduction reaction Methods 0.000 description 28
- XEEYBQQBJWHFJM-UHFFFAOYSA-N Iron Chemical compound [Fe] XEEYBQQBJWHFJM-UHFFFAOYSA-N 0.000 description 16
- XKRFYHLGVUSROY-UHFFFAOYSA-N Argon Chemical compound [Ar] XKRFYHLGVUSROY-UHFFFAOYSA-N 0.000 description 14
- 229910052751 metal Inorganic materials 0.000 description 11
- 239000002184 metal Substances 0.000 description 11
- 230000008569 process Effects 0.000 description 11
- 229910052786 argon Inorganic materials 0.000 description 8
- 229910052742 iron Inorganic materials 0.000 description 8
- 239000011261 inert gas Substances 0.000 description 7
- 238000005516 engineering process Methods 0.000 description 6
- OKTJSMMVPCPJKN-UHFFFAOYSA-N Carbon Chemical compound [C] OKTJSMMVPCPJKN-UHFFFAOYSA-N 0.000 description 3
- 229910052799 carbon Inorganic materials 0.000 description 3
- 239000003795 chemical substances by application Substances 0.000 description 3
- 239000000463 material Substances 0.000 description 3
- IJGRMHOSHXDMSA-UHFFFAOYSA-N Atomic nitrogen Chemical compound N#N IJGRMHOSHXDMSA-UHFFFAOYSA-N 0.000 description 2
- XUIMIQQOPSSXEZ-UHFFFAOYSA-N Silicon Chemical compound [Si] XUIMIQQOPSSXEZ-UHFFFAOYSA-N 0.000 description 2
- 230000008859 change Effects 0.000 description 2
- 239000003638 chemical reducing agent Substances 0.000 description 2
- 238000010924 continuous production Methods 0.000 description 2
- 230000000694 effects Effects 0.000 description 2
- 238000003912 environmental pollution Methods 0.000 description 2
- 239000007789 gas Substances 0.000 description 2
- 238000002844 melting Methods 0.000 description 2
- 230000008018 melting Effects 0.000 description 2
- 229910052710 silicon Inorganic materials 0.000 description 2
- 239000010703 silicon Substances 0.000 description 2
- 206010003497 Asphyxia Diseases 0.000 description 1
- 229910000831 Steel Inorganic materials 0.000 description 1
- RTAQQCXQSZGOHL-UHFFFAOYSA-N Titanium Chemical compound [Ti] RTAQQCXQSZGOHL-UHFFFAOYSA-N 0.000 description 1
- 229910052782 aluminium Inorganic materials 0.000 description 1
- XAGFODPZIPBFFR-UHFFFAOYSA-N aluminium Chemical compound [Al] XAGFODPZIPBFFR-UHFFFAOYSA-N 0.000 description 1
- 230000009286 beneficial effect Effects 0.000 description 1
- 239000011449 brick Substances 0.000 description 1
- 229910010293 ceramic material Inorganic materials 0.000 description 1
- 230000003749 cleanliness Effects 0.000 description 1
- 230000001276 controlling effect Effects 0.000 description 1
- 238000007599 discharging Methods 0.000 description 1
- 238000010891 electric arc Methods 0.000 description 1
- 238000004134 energy conservation Methods 0.000 description 1
- 230000002708 enhancing effect Effects 0.000 description 1
- 230000007613 environmental effect Effects 0.000 description 1
- 239000002803 fossil fuel Substances 0.000 description 1
- 239000001307 helium Substances 0.000 description 1
- 229910052734 helium Inorganic materials 0.000 description 1
- SWQJXJOGLNCZEY-UHFFFAOYSA-N helium atom Chemical compound [He] SWQJXJOGLNCZEY-UHFFFAOYSA-N 0.000 description 1
- 230000006872 improvement Effects 0.000 description 1
- 239000012535 impurity Substances 0.000 description 1
- 229910052743 krypton Inorganic materials 0.000 description 1
- DNNSSWSSYDEUBZ-UHFFFAOYSA-N krypton atom Chemical compound [Kr] DNNSSWSSYDEUBZ-UHFFFAOYSA-N 0.000 description 1
- 238000009869 magnesium metallurgy Methods 0.000 description 1
- 239000000203 mixture Substances 0.000 description 1
- 230000004048 modification Effects 0.000 description 1
- 238000012986 modification Methods 0.000 description 1
- 238000006386 neutralization reaction Methods 0.000 description 1
- 229910052757 nitrogen Inorganic materials 0.000 description 1
- 239000011148 porous material Substances 0.000 description 1
- 239000000843 powder Substances 0.000 description 1
- 238000002360 preparation method Methods 0.000 description 1
- 238000005086 pumping Methods 0.000 description 1
- 230000036632 reaction speed Effects 0.000 description 1
- 238000011946 reduction process Methods 0.000 description 1
- 230000001105 regulatory effect Effects 0.000 description 1
- 239000002893 slag Substances 0.000 description 1
- 239000002910 solid waste Substances 0.000 description 1
- 229910001220 stainless steel Inorganic materials 0.000 description 1
- 239000010935 stainless steel Substances 0.000 description 1
- 239000010959 steel Substances 0.000 description 1
- 230000001360 synchronised effect Effects 0.000 description 1
- 239000010936 titanium Substances 0.000 description 1
- 229910052719 titanium Inorganic materials 0.000 description 1
- WFKWXMTUELFFGS-UHFFFAOYSA-N tungsten Chemical compound [W] WFKWXMTUELFFGS-UHFFFAOYSA-N 0.000 description 1
- 229910052721 tungsten Inorganic materials 0.000 description 1
- 239000010937 tungsten Substances 0.000 description 1
- 239000002912 waste gas Substances 0.000 description 1
Classifications
-
- Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
- Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
- Y02P—CLIMATE CHANGE MITIGATION TECHNOLOGIES IN THE PRODUCTION OR PROCESSING OF GOODS
- Y02P10/00—Technologies related to metal processing
- Y02P10/20—Recycling
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- Manufacture And Refinement Of Metals (AREA)
Abstract
The invention provides a device and a method for preparing magnesium by utilizing hydrogen plasma reduction, comprising a vacuum tank, a smelting furnace, a condensing system and a plasma generator, wherein the smelting furnace is arranged in the vacuum tank, a furnace lining is arranged in a furnace body of the smelting furnace, a furnace cover is arranged at the upper end of the furnace body, a feed inlet is arranged on the furnace cover, and a waste discharge port is arranged at the lower end of the furnace body; the upper part of the furnace body is provided with a magnesium outlet pipe in a penetrating way, and the lower part of the furnace body is provided with a plasma generator; the inner end of the magnesium outlet pipe is positioned in the furnace body, the inner end is provided with a filter screen, the outer end is positioned outside the vacuum tank, and the outer end is connected with the condensing system; the spray gun of the plasma generator is connected with the furnace body in a sealing way; the feed inlet is connected with an automatic feeding system. The invention not only reduces the use of inert plasmas, but also avoids the use of an indirect heating device, and has the advantages of reducing energy consumption and improving the energy utilization rate and the production efficiency.
Description
Technical Field
The invention belongs to the field of metal smelting, and particularly relates to a device and a method for preparing magnesium by utilizing hydrogen plasma reduction.
Background
Magnesium has the characteristics of high density, high hardness, excellent electrical conductivity, thermal conductivity and the like, and is widely applied to the fields of automobiles, aerospace, electronics and the like. The traditional magnesium production process mainly comprises an electrolytic method and a thermal reduction method, wherein the electrolytic method has large equipment investment and high energy consumption. The reduction agent is classified into a silicon thermal method, a carbon thermal method and an aluminum thermal method, and the reduction agent has the characteristics of simple operation process and low equipment investment, but the reduction agent needs external heating and cannot be continuously produced, so that the reduction rate is low, the environment is polluted and the like. Therefore, the development of an efficient, environment-friendly and continuous magnesium smelting process is necessary to realize the aims of energy conservation and emission reduction under the condition of carbon neutralization.
Aiming at the key technical problems in magnesium metallurgy production, the invention patent with publication number of CN107523701A provides a method for reducing metallic magnesium by silicon heat under normal pressure, in particular to a method for reducing magnesium partial pressure around a ball by using flowing gas so as to enable reaction to continuously and rapidly occur. The method not only solves the vacuum problem of the traditional process, but also realizes the automatic continuous production of magnesium smelting, but the continuous discharge of a large amount of inert gases (such as argon, helium, krypton and the like) still can cause the problems of low utilization rate, resource waste, potential safety hazard and the like. In order to reduce the use of inert gas, the invention patent with the publication number of CN113801998A provides a continuous reduction method and device for metal magnesium under the protection of atmospheric pressure argon, and adopts a shaft furnace structure under the state of atmospheric pressure argon to realize continuous production of magnesium smelting by the Pidgeon process, but a great amount of heat energy still needs to be consumed for synchronous heating of a furnace body and a heating wire.
From the point of view of national energy development strategy, hydrogen energy is an ideal green energy. In order to change the dependence of the traditional technology on fossil fuel and improve the environmental benefit of the iron-making technology, the patent with publication No. CN106011357A provides a method and a system for smelting reduction iron-making by hydrogen plasma, and the technical solution is as follows: firstly, argon is sent into a plasma spray gun to form an electric arc under high-frequency voltage; and then the hydrogen-argon mixture is sent into a plasma spray gun and ionized into plasma, so that iron ore powder is reduced and melted into metallic iron in a high-temperature plasma flame area. Although the process improves the cleanliness of the smelting process, the inert gas which has large consumption, low efficiency and continuous discharge of the hydrogen-argon mixed gas has potential safety hazards which cause suffocation of personnel. For this reason, the invention patent with publication number CN115522009a provides a pure hydrogen plasma smelting reduction ironmaking method, which has the technical solution that: firstly, introducing inert gases such as nitrogen or argon and the like into a melting furnace filled with iron ore through a plasma torch, discharging air in the inert gases and heating the inert gases to 400-550 ℃; and then gradually increasing the flow of pure hydrogen input into the plasma torch, reducing the input amount of inert gas, and heating and reducing iron ore by utilizing high-temperature hydrogen plasma flame to form molten iron. The technology realizes green pollution-free large-scale iron making, but the normal-pressure high-temperature melting still has higher energy consumption, and the purity of the generated molten metal iron is not high, and the subsequent processing treatment is still needed.
In summary, although the plasma high-temperature reduction technology has certain application in the field of iron making, the technology still needs to be further improved in the aspects of improving the production efficiency, saving energy and reducing emission. Hydrogen at high temperature is a green reducing agent for magnesium oxide, and can reduce magnesium oxide with high efficiency, and no slag and no waste gas are generated. To make hydrogen reduction truly a powerful challenger for traditional carbon reduction processes, new methods and techniques for enhancing the hydrogen reduction reaction must be identified.
Disclosure of Invention
The invention provides a device and a method for preparing magnesium by utilizing hydrogen plasma reduction, which not only can efficiently utilize hydrogen energy, but also can improve the metal reduction rate, and have the characteristics of short process flow, high production efficiency, small environmental pollution and the like.
In order to achieve the technical effects, the invention adopts the following technical scheme:
the invention discloses a device for preparing magnesium by hydrogen plasma reduction, which comprises a vacuum tank, a smelting furnace, a condensing system and a plasma generator, wherein the smelting furnace is arranged in the vacuum tank, a furnace lining is arranged in a furnace body of the smelting furnace, a furnace cover is arranged at the upper end of the furnace body, a feed inlet is arranged on the furnace cover, and a waste discharge port is arranged at the lower end of the furnace body; the upper part of the furnace body is provided with a magnesium outlet pipe in a penetrating way, and the lower part of the furnace body is provided with a plasma generator; the inner end of the magnesium outlet pipe is positioned in the furnace body, the inner end is provided with a filter screen, the outer end is positioned outside the vacuum tank, and the outer end is connected with the condensing system; the feed inlet is connected with an automatic feeding system.
Preferably, the condensing system is arranged at the upper part of the smelting furnace.
Preferably, the smelting furnace is in a shape of an olive-shaped structure with a large middle part and two small ends.
Preferably, the condensing system further comprises a vacuum device.
Preferably, the filter screen is a carbon material filter screen, and the aperture is 120 meshes.
Preferably, the number of the plasma generators is plural.
A method for preparing magnesium by hydrogen plasma reduction comprises the following steps:
step 1, sealing a smelting furnace, and vacuumizing, wherein the vacuum degree in the furnace body is 1-30Pa;
step 2, turning on plasma generators around the furnace body, and spraying high-speed flowing hydrogen plasma into the furnace chamber; simultaneously, an automatic feeding system is opened to uniformly add magnesium oxide into the smelting furnace through a feed inlet;
step 3, fully reacting the highly ionized hydrogen plasma with magnesium oxide from top to bottom; the generated magnesium vapor flows upwards, enters a magnesium outlet pipe through a filter screen, is pumped into a condensing system by a vacuum device in the condensing system and is condensed into condensed magnesium; solid MgO particles which do not participate in the reaction are collected through a waste discharge port and recycled through a feed port.
Preferably, the plasma generator generates plasma by electromagnetic or arc heating.
Preferably, the temperature of the plasma beam coverage area emitted by the plasma generator is 6000-10000 ℃.
Preferably, the magnesia injected by the automatic feeding system through the feed inlet is magnesia raw material or magnesia generated by directly calcining magnesium ore.
The beneficial effects of the invention are as follows:
in order to fully utilize the characteristics of high temperature and high activity of the arc plasma, the invention is applied to the field of active metal smelting with a reduction product being metal vapor, thereby further improving the metallurgical efficiency, reducing the energy consumption and improving the environment. According to the principle of plasma hydrogen production, highly ionized hydrogen has very high energy density and reaction speed, and hydrogen energy can be better utilized, so that sustainable development is realized. Based on original magnesium smelting, the invention replaces the traditional reducing agent with hydrogen plasma to change the state of hydrogen participating in the reduction reaction, thereby improving the reduction capability of hydrogen on thermodynamic and kinetic aspects.
The invention heats and reduces magnesium oxide by the highly ionized hydrogen plasma emitted by the hydrogen plasma generator, fully utilizes the high energy density of the hydrogen plasma to improve the reduction rate of magnesium oxide, reduces the use of inert plasmas (such as argon), avoids the use of an indirect heating device, and has the advantages of reducing energy consumption and improving the energy utilization rate and the production efficiency. In addition, the magnesium oxide as a reducing material is continuously injected into the furnace chamber of the smelting furnace from top to bottom through the feed inlet, can be fully contacted with the injected hydrogen plasma and generate a reduction reaction, does not need to perform a precast block process on the raw materials, and has the advantages of reducing the preparation flow and the production cost. Compared with the traditional magnesium production process, the process has the advantages of simple flow, less emission, high efficiency and clean production.
Drawings
In order to more clearly illustrate the embodiments of the present invention or the technical solutions in the prior art, the drawings used in the embodiments or the description of the prior art will be briefly described, and it is apparent that the drawings in the following description are only preferred embodiments of the present invention and are not to be construed as limiting the present invention. Other figures can be obtained from this figure by those of ordinary skill in the art without undue burden.
Fig. 1 is a schematic view of the structure of the device of the present invention.
In the figure: 1-vacuum tank furnace, 2-furnace body, 3-furnace lining, 4-furnace cover, 5-feed inlet, 6-magnesium outlet pipe, 7-condensing system, 8-filter screen, 9-plasma generator and 10-waste discharge port.
Detailed Description
The present invention will be described in further detail with reference to the drawings and examples, in order to make the objects, technical solutions and advantages of the present invention more apparent. It should be understood that the specific embodiments described herein are for purposes of illustration only and are not intended to limit the scope of the invention.
Example 1:
the embodiment provides a device for preparing magnesium by hydrogen plasma reduction, which comprises a vacuum tank 1, a smelting furnace, a condensing system 7 and a plasma generator 9, wherein the smelting furnace comprises a furnace body 2, a furnace lining 3 and a furnace cover 4, and rubber sealing rings are arranged at all sealing joints on the furnace body 2. The furnace body 2 and the furnace cover 4 can be made of heat-resistant steel, stainless steel, tungsten metal or titanium metal, and the furnace lining 3 can be made of magnesia refractory bricks, refractory plates or refractory felts.
A smelting furnace is arranged in the vacuum tank 1, a furnace liner 3 is arranged in a furnace body 2 of the smelting furnace, a furnace cover 4 is arranged at the upper end of the furnace body 2, a feed inlet 5 is arranged on the furnace cover 4, and a waste discharge port 10 is arranged at the lower end of the furnace body 2 of the smelting furnace; the upper part of the furnace body 2 of the smelting furnace is provided with a magnesium outlet pipe 6 in a penetrating way, the lower part of the furnace body is provided with a plasma generator 9, and the plasma generator 9 is arranged around the lower part of the middle of the smelting furnace to stably provide hydrogen plasma and a heat source for reducing magnesium oxide; the plasma generator 9 is arranged outside the vacuum tank, and the plasma spray gun extends into the furnace body and is connected with the furnace body wall in a sealing way. The inner end of the magnesium outlet pipe 6 is positioned in the furnace body 2, and a filter screen 8 is arranged at the inner end; the outer port of the magnesium outlet pipe 6 is positioned outside the vacuum tank and is connected with a condensing system 7. The condensing system 7 is arranged in the middle of the smelting furnace and is positioned above the smelting furnace, so that magnesium vapor generated by thermal reduction can be condensed Cheng Gutai magnesium; the feed inlet 5 is connected with an automatic feeding system, and can provide continuous reaction materials (magnesium oxide) for the smelting process.
In the embodiment, the condensing system 7 is arranged at the upper part of the smelting furnace, and the condensing system 7 is connected with the smelting furnace through a rubber sealing ring. The condensing system 7 also comprises a vacuum device which can ensure the vacuum condition required in the smelting furnace and the condensing system 7. The filter screen 8 is made of carbon material, has a pore diameter of 120 meshes, and can filter impurity particles (MgO and Mg (OH)) which are not gasified 2 Etc.). Around the smelting furnace there is a set of plasma generators 9, which may be 3, 4, 6 or more.
The smelting furnace is of an olive-shaped structure with large middle and small two ends, is convenient for material application, reaction and solid waste collection, and effectively utilizes the space in the furnace. The feed inlet 5 and the waste discharge outlet 10 are made of magnesia ceramic materials. The magnesium oxide contacts and reacts with the hydrogen plasma in the furnace space, and unreacted particles on the side near the furnace wall drop and slide into the waste discharge port 10 along the furnace wall, thereby realizing effective collection.
The device of the invention is provided with a corresponding electrical control system, a vacuum pumping system and a charging system. In the vacuumized sealed smelting furnace 2, highly ionized hydrogen plasma generated by a plasma generator 9 heats and reduces magnesium oxide injected from the feed inlet 5, magnesium vapor is obtained through reaction, and solid metal magnesium is obtained through a condensing system 7. The technology can not only efficiently utilize hydrogen energy, but also improve the metal reduction rate, and the metal reduction rate is up to more than 90%, and has the characteristics of short process flow, high production efficiency, small environmental pollution and the like.
Example 2:
this example was prepared using an apparatus for producing magnesium by hydrogen plasma reduction of example 1, and comprises the following steps:
step 1, sealing the joints of a smelting furnace and accessories, and regulating and controlling the vacuum degree in a furnace body to be 10Pa;
step 2, turning on plasma generators 9 around the furnace body 2, and spraying high-speed flowing hydrogen plasma into the furnace chamber; simultaneously, an automatic feeding system is opened to uniformly add magnesia raw materials into the smelting furnace through a feed inlet 5;
step 3, fully reacting the highly ionized hydrogen plasma with magnesium oxide from top to bottom; the generated magnesium vapor flows upwards, enters the magnesium outlet pipe 6 through the filter screen 8, is pumped into a condensing system by a vacuum device in the condensing system 7, and is condensed into condensed magnesium; the solid MgO particles which do not participate in the reaction are collected through the waste discharge port 10 to be recycled through the feed port.
In this embodiment, the plasma generator generates plasma by electromagnetic or arc heating, and the temperature of the plasma beam footprint emitted by the plasma generator may reach 6000-10000 ℃. The raw material injected by the automatic feeding system through the feed inlet can be magnesium oxide raw material or magnesium oxide generated by directly calcining magnesium ore.
The foregoing is illustrative of the present invention and is not to be construed as limiting thereof, but rather, any modification, equivalent replacement, improvement or the like which comes within the spirit and principles of the present invention are intended to be included within the scope of the present invention.
Claims (10)
1. The device for preparing magnesium by hydrogen plasma reduction is characterized in that: the smelting furnace comprises a vacuum tank (1), a smelting furnace, a condensing system (7) and a plasma generator (9), wherein the smelting furnace is arranged in the vacuum tank (1), a furnace lining (3) is arranged in a furnace body (2) of the smelting furnace, a furnace cover (4) is arranged at the upper end of the furnace body (2), a feed inlet (5) is arranged on the furnace cover (4), and a waste discharge port (10) is arranged at the lower end of the furnace body (2); the upper part of the furnace body (2) is provided with a magnesium outlet pipe (6) in a penetrating way, and the lower part of the furnace body is provided with a plasma generator (9); the inner end of the magnesium outlet pipe (6) is positioned in the furnace body, the inner end is provided with a filter screen (8), the outer end is positioned outside the vacuum tank (1), and the outer end is connected with a condensing system (7); the feeding port (5) is connected with an automatic feeding system.
2. The apparatus for producing magnesium by hydrogen plasma reduction according to claim 1, wherein: the condensing system (7) is arranged at the upper part of the smelting furnace (2).
3. The apparatus for producing magnesium by hydrogen plasma reduction according to claim 1, wherein: the furnace body (2) is of an olive-shaped structure with a large middle part and two small ends.
4. The apparatus for producing magnesium by hydrogen plasma reduction according to claim 1, wherein: the condensing system (7) further comprises a vacuum device.
5. The apparatus for producing magnesium by hydrogen plasma reduction according to claim 1, wherein: the filter screen (8) is a carbon material filter screen, and the aperture is 120 meshes.
6. The apparatus for producing magnesium by hydrogen plasma reduction according to claim 1, wherein: the number of the plasma generators (9) is plural.
7. The method for preparing magnesium by hydrogen plasma reduction according to claim 1, wherein the method comprises the following steps: the method comprises the following steps:
step 1, sealing a smelting furnace, and vacuumizing, wherein the vacuum degree in the furnace body is 1-30Pa;
step 2, turning on plasma generators (9) around the furnace body (2), and spraying high-speed flowing hydrogen plasma into the furnace chamber; simultaneously, an automatic feeding system is opened to uniformly add magnesium oxide into the smelting furnace through a feed inlet (5);
step 3, fully reacting the highly ionized hydrogen plasma with magnesium oxide from top to bottom; the generated magnesium vapor flows upwards, enters a magnesium outlet pipe (6) through a filter screen (8), and is pumped into a condensing system by a vacuum device in the condensing system (7) to be condensed into condensed magnesium; solid MgO particles which do not participate in the reaction are collected through a waste discharge port (10) and recycled through a feed port (5).
8. The method for preparing magnesium by hydrogen plasma reduction according to claim 7, wherein: the plasma generator (9) generates plasma by electromagnetic or arc heating.
9. The method for preparing magnesium by hydrogen plasma reduction according to claim 7 or 8, wherein: the temperature of the plasma beam coverage area emitted by the plasma generator (9) is 6000-10000 ℃.
10. The method for preparing magnesium by hydrogen plasma reduction according to claim 7, wherein: the raw material magnesia injected by the automatic feeding system through the feed inlet (5) is magnesia raw material or magnesia generated by directly calcining magnesium ore.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202311786951.1A CN117867296A (en) | 2023-12-25 | 2023-12-25 | Device and method for preparing magnesium by hydrogen plasma reduction |
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202311786951.1A CN117867296A (en) | 2023-12-25 | 2023-12-25 | Device and method for preparing magnesium by hydrogen plasma reduction |
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| CN202311786951.1A Pending CN117867296A (en) | 2023-12-25 | 2023-12-25 | Device and method for preparing magnesium by hydrogen plasma reduction |
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