CN114703512B - Novel lower heating graphite crucible - Google Patents
Novel lower heating graphite crucible Download PDFInfo
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- CN114703512B CN114703512B CN202210403280.5A CN202210403280A CN114703512B CN 114703512 B CN114703512 B CN 114703512B CN 202210403280 A CN202210403280 A CN 202210403280A CN 114703512 B CN114703512 B CN 114703512B
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- graphite crucible
- crucible
- graphite
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- temperature
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- OKTJSMMVPCPJKN-UHFFFAOYSA-N Carbon Chemical compound [C] OKTJSMMVPCPJKN-UHFFFAOYSA-N 0.000 title claims abstract description 100
- 229910002804 graphite Inorganic materials 0.000 title claims abstract description 98
- 239000010439 graphite Substances 0.000 title claims abstract description 98
- 238000010438 heat treatment Methods 0.000 title claims abstract description 69
- 229910052751 metal Inorganic materials 0.000 claims abstract description 27
- 239000002184 metal Substances 0.000 claims abstract description 27
- 230000008719 thickening Effects 0.000 claims abstract description 20
- 239000003792 electrolyte Substances 0.000 claims description 7
- 239000002994 raw material Substances 0.000 claims description 3
- 150000003839 salts Chemical class 0.000 abstract description 19
- 238000004519 manufacturing process Methods 0.000 abstract description 11
- 239000002893 slag Substances 0.000 abstract description 11
- 230000015572 biosynthetic process Effects 0.000 abstract description 6
- 229910052761 rare earth metal Inorganic materials 0.000 description 9
- 238000006243 chemical reaction Methods 0.000 description 8
- 238000005868 electrolysis reaction Methods 0.000 description 7
- 150000002910 rare earth metals Chemical class 0.000 description 7
- 239000007788 liquid Substances 0.000 description 6
- 239000012535 impurity Substances 0.000 description 5
- 230000007797 corrosion Effects 0.000 description 4
- 238000005260 corrosion Methods 0.000 description 4
- 230000005684 electric field Effects 0.000 description 4
- 230000002035 prolonged effect Effects 0.000 description 4
- 229910001404 rare earth metal oxide Inorganic materials 0.000 description 4
- 239000007770 graphite material Substances 0.000 description 3
- 238000000034 method Methods 0.000 description 3
- 238000003723 Smelting Methods 0.000 description 2
- QVGXLLKOCUKJST-UHFFFAOYSA-N atomic oxygen Chemical compound [O] QVGXLLKOCUKJST-UHFFFAOYSA-N 0.000 description 2
- 229910052799 carbon Inorganic materials 0.000 description 2
- 238000004090 dissolution Methods 0.000 description 2
- 239000007789 gas Substances 0.000 description 2
- 229910052760 oxygen Inorganic materials 0.000 description 2
- 239000001301 oxygen Substances 0.000 description 2
- -1 rare earth metal ions Chemical class 0.000 description 2
- 238000003756 stirring Methods 0.000 description 2
- 239000002344 surface layer Substances 0.000 description 2
- KRHYYFGTRYWZRS-UHFFFAOYSA-M Fluoride anion Chemical compound [F-] KRHYYFGTRYWZRS-UHFFFAOYSA-M 0.000 description 1
- ZOKXTWBITQBERF-UHFFFAOYSA-N Molybdenum Chemical compound [Mo] ZOKXTWBITQBERF-UHFFFAOYSA-N 0.000 description 1
- 239000000956 alloy Substances 0.000 description 1
- 229910045601 alloy Inorganic materials 0.000 description 1
- 238000004140 cleaning Methods 0.000 description 1
- 230000007547 defect Effects 0.000 description 1
- 238000010586 diagram Methods 0.000 description 1
- 230000008030 elimination Effects 0.000 description 1
- 238000003379 elimination reaction Methods 0.000 description 1
- 230000006698 induction Effects 0.000 description 1
- 238000010079 rubber tapping Methods 0.000 description 1
Classifications
-
- C—CHEMISTRY; METALLURGY
- C25—ELECTROLYTIC OR ELECTROPHORETIC PROCESSES; APPARATUS THEREFOR
- C25C—PROCESSES FOR THE ELECTROLYTIC PRODUCTION, RECOVERY OR REFINING OF METALS; APPARATUS THEREFOR
- C25C7/00—Constructional parts, or assemblies thereof, of cells; Servicing or operating of cells
- C25C7/005—Constructional parts, or assemblies thereof, of cells; Servicing or operating of cells of cells for the electrolysis of melts
-
- C—CHEMISTRY; METALLURGY
- C25—ELECTROLYTIC OR ELECTROPHORETIC PROCESSES; APPARATUS THEREFOR
- C25C—PROCESSES FOR THE ELECTROLYTIC PRODUCTION, RECOVERY OR REFINING OF METALS; APPARATUS THEREFOR
- C25C3/00—Electrolytic production, recovery or refining of metals by electrolysis of melts
- C25C3/34—Electrolytic production, recovery or refining of metals by electrolysis of melts of metals not provided for in groups C25C3/02 - C25C3/32
-
- 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
Landscapes
- Chemical & Material Sciences (AREA)
- Engineering & Computer Science (AREA)
- Chemical Kinetics & Catalysis (AREA)
- Electrochemistry (AREA)
- Materials Engineering (AREA)
- Metallurgy (AREA)
- Organic Chemistry (AREA)
- Crucibles And Fluidized-Bed Furnaces (AREA)
Abstract
The invention provides a novel lower heating graphite crucible, which comprises a graphite crucible, wherein the graphite crucible is divided into a cylindrical region, a graphite thickening region, a temperature sensing heating region and a truncated cone-shaped groove region from top to bottom; anode plates are arranged in the cylindrical region; the bottom of the inner side of the circular truncated cone-shaped groove area is provided with a metal receiver, and the temperature sensing heating area is nested with an annular heating coil; the two ports of the annular heating coil are protruded out of the graphite crucible; an insulating member is nested between two ports of the annular heating coil, an extending groove is formed in the center of the insulating member, and a temperature sensing piece is arranged in the extending groove; according to the scheme, the temperature sensing piece is arranged at the position corresponding to the low-temperature area at the lower part of the graphite crucible, so that the temperature of molten salt at the bottom of the crucible can be monitored in real time and fed back, and accurate data reference is provided for production operation; when the temperature of the low-temperature area is too low or slag is formed, the low-temperature area at the bottom of the crucible can be heated by the heating coil, so that the purposes of eliminating slag formation and lifting, protecting the crucible and improving the purity of metal are achieved.
Description
Technical Field
The invention relates to the technical field of rare earth molten salt electrolysis equipment, in particular to a novel lower heating graphite crucible.
Background
The electrolytic process of molten salt of rare earth is a main production process for producing rare earth metal and its alloy, the crucible (furnace) of electrolytic tank is made of graphite material, and its structure directly affects the quality, working efficiency and production cost of rare earth metal product. The electrolytic system of fluoride is mostly adopted for producing rare earth metal by molten salt electrolysis, the adopted electrolytic tank is of an open type, a cathode rod is inserted in the middle of a crucible during electrolysis, graphite anode sheets are hung on the periphery of the crucible, thus forming an electrode to generate an electric field, and the smelting temperature is above 1000 ℃. After rare earth oxide is added into a graphite crucible, high temperature and molten salt assist dissolution are carried out to dissolve the rare earth oxide, the precipitated rare earth metal ions tend to a cathode by the action of an electric field, and the precipitated oxygen reacts with graphite materials (carbon) in the crucible to form gas volatilization.
In general, graphite crucibles used in rare earth molten salt electrolysis production are all of regular cylinder structures, in actual production, cathode bars are used as central shafts to symmetrically distribute at least 2 groups of anode sheets, one ends of the anode sheets are fixed on a fixture, and the anode sheets are suspended in electrolyte along the circumferential arrangement of the inner wall of the graphite crucible by adjusting the positions of the fixture. A metal receiver with a regular cylinder shape is arranged at the right opposite position of the lower part of the cathode rod, metal liquid drops generated by reaction are enriched on the cathode rod, and the metal liquid drops fall into the metal receiver from the bottom end of the cathode rod after reaching a certain weight.
The bottom end of the anode sheet is usually kept at a distance of 100-300mm from the bottom end of the crucible, and because of the non-electrolytic reaction zone, the molten salt temperature in the distance section is lower, and belongs to a low-temperature zone, in the daily operation process, a worker judges the temperature of the molten salt by observing the surface layer liquid level, the temperature control difficulty of the non-reaction zone below the surface layer is higher, the temperature value is estimated through experience, the influence of a plurality of factors on the site is avoided, the error is unavoidably generated, and the operation stability is directly reduced.
Meanwhile, various impurities including metal slag are easy to enrich at the bottom of the crucible, the enrichment reaches a certain degree, the graphite crucible is condensed together at the bottom of the crucible to form a state similar to incrustation, the phenomenon of incrustation will occur, aiming at slight incrustation, an operator increases the stirring frequency, and scrapes away the enriched metal slag on the wall of the crucible by using the tip of a molybdenum rod, so that mechanical damage is necessarily caused to the middle and lower parts of the crucible, further crucible loss is increased, huge concave is generated, even electrolyte leakage is caused, the service life of the crucible is seriously reduced, if the incrustation is serious, high-pressure equipment is needed to heat molten salt until the fused salt is melted, a molten salt reaction system is destroyed under the condition of high pressure, and damage to the crucible and equipment is unavoidable.
In summary, the current graphite electrolysis cell and its components have the following problems in the use process: (1) The temperature of the low-temperature area of the graphite crucible is difficult to master and control, and the operation stability is directly affected; (2) Under the low-temperature condition, metal liquid drops and impurities enriched at the bottom of the crucible are subjected to slagging and lifting, manual stirring and high-pressure elimination are generally adopted in production, so that a molten salt reaction system is damaged, and meanwhile, the crucible is deeply damaged.
Disclosure of Invention
Aiming at the technical defects, the invention aims to provide a novel lower heating graphite crucible, which can monitor the temperature of molten salt at the bottom of the crucible in real time and provide accurate data reference for production operation; in addition, when the temperature of the low-temperature area is too low or slag formation or platform lifting is carried out, the heating coil is used for heating the low-temperature area at the bottom of the crucible, so that the purposes of eliminating slag formation, improving a reaction system and improving the comprehensive quality of metal are achieved.
In order to achieve the above purpose, the invention adopts the following technical scheme:
A novel lower heating graphite crucible comprises a graphite crucible, wherein the graphite crucible is divided into a cylindrical region for placing raw materials and electrolyte, a graphite thickening region, a temperature sensing heating region and a truncated cone-shaped groove region from top to bottom; anode plates which are arranged along the circumferential direction of the inner wall of the crucible are arranged in the cylindrical region; the bottom of the inner side of the circular truncated cone-shaped groove area is provided with a metal receiver, and the temperature sensing heating area is nested with an annular heating coil; the two ports of the annular heating coil are protruded out of the graphite crucible and are connected with an alternating current power supply; an insulating member is nested between two ports of the annular heating coil, an extending groove is formed in the center of the insulating member along the inner cavity direction of the graphite crucible, and a temperature sensing piece capable of measuring and feeding back the temperature of the bottom of the crucible is arranged in the extending groove.
Preferably, the distance between the edge of the annular heating coil and the outer surface of the inner cavity of the graphite crucible is more than or equal to 15cm.
Preferably, the distance between the inner cavity surface of the extension groove and the inner cavity surface of the graphite crucible is more than or equal to 15cm.
Preferably, the included angle between the inner cavity surface of the graphite thickening area and the central line of the graphite crucible is 30-50 degrees, and the included angle between the temperature sensing heating area and the central line of the graphite crucible is 40-70 degrees.
Preferably, the vertical height of the graphite thickening area and the temperature sensing heating area is more than or equal to 1/4 of the total height of the outer part of the graphite crucible.
Preferably, the metal receiver is of a bowl-shaped structure with a wide upper part and a narrow lower part and is matched with the truncated cone-shaped groove area.
Preferably, the upper port of the metal receiver is at least 2cm above the upper port of the frustoconical recess region.
Preferably, the vertical distance from the bottom surface of the truncated cone-shaped groove region to the bottom surface of the graphite crucible is at least the minimum distance from the inner wall of the cylindrical region to the outer side wall of the graphite crucible.
Preferably, the diameters of the upper ports of the truncated cone-shaped graphite thickening area and the temperature sensing heating area are larger than the diameters of the lower ends of the truncated cone-shaped graphite thickening area and the temperature sensing heating area; the caliber of the lower end of the graphite thickening area is consistent with the caliber of the upper end of the temperature sensing heating area.
Compared with the prior art, the invention has the following advantages:
1. According to the scheme, the temperature sensing piece is arranged at a position corresponding to a low-temperature area at the lower part of the graphite crucible, and can monitor the temperature of molten salt at the bottom of the crucible in real time and feed back the temperature, so that accurate data reference is provided for production operation;
2. According to the scheme, the annular heating coil is nested in the graphite crucible temperature-sensing heating area, when the temperature of the low-temperature area is too low or slag formation and lifting are carried out, the low-temperature area at the bottom of the crucible is heated through the heating coil, so that the purposes of eliminating slag formation and lifting are achieved, protecting the crucible and improving the purity of metal are achieved.
Drawings
FIG. 1 is a schematic diagram of the structure of the present invention;
fig. 2 is a cross-sectional view taken along the direction A-A in fig. 1.
Wherein:
1. A cylindrical region; 2. a graphite thickening region; 3. a temperature-sensitive heating area; 4. an annular heating coil; 5. an extension groove; 6. a truncated cone-shaped groove region; 7. a metal receiver; 8. an insulating member; 9. graphite crucible.
Detailed Description
The invention is further described below with reference to the accompanying drawings.
As shown in fig. 1 to 2, a novel lower heating graphite crucible comprises a graphite crucible 9, wherein the outside of the graphite crucible 9 is of a regular cylinder structure and is divided into a cylindrical region 1 for placing raw materials and electrolyte, a graphite thickening region 2, a temperature sensing heating region 3 and a truncated cone-shaped groove region 6 from top to bottom; anode strips which are arranged along the circumferential direction of the inner wall of the crucible are arranged in the cylindrical region 1; the bottom of the inner side of the truncated cone-shaped groove zone 6 is provided with a metal receiver 7, the temperature-sensing heating zone 3 is nested with an annular heating coil 4, and the annular heating coil 4 is arranged in an annular shape for uniformly heating the bottom of the crucible; the two ports of the annular heating coil 4 protrude out of the graphite crucible 9 and are connected with an alternating current power supply; an insulating member 8 is nested between two ports of the annular heating coil 4, an extending groove 5 is formed in the center of the insulating member 8 along the inner cavity direction of the graphite crucible 9, and a temperature sensing piece capable of measuring and feeding back the temperature of the bottom of the crucible is arranged in the extending groove 5.
Further, the distance between the edge of the annular heating coil 4 and the outer surface of the inner cavity of the graphite crucible 9 is more than or equal to 15cm, the thickness is increased, the corrosion resistance of the crucible is improved, leakage is avoided, and the service life of the graphite crucible 9 is prolonged.
Further, the distance between the inner cavity surface of the extension groove 5 and the inner cavity surface of the graphite crucible 9 is more than or equal to 15cm, the thickness is increased, the corrosion resistance of the crucible is improved, leakage is avoided, and the service life of the graphite crucible 9 is prolonged.
Further, the included angle between the inner cavity surface of the graphite thickening area 2 and the central line of the graphite crucible 9 is 30-50 degrees, and the included angle between the temperature sensing heating area 3 and the central line of the graphite crucible 9 is 40-70 degrees.
Further, the vertical height of the graphite thickening area 2 and the temperature sensing heating area 3 is more than or equal to 1/4 of the whole height of the outer part of the graphite crucible 9, so that impurities and slag are conveniently enriched in the induction heating area, the thickness of the graphite thickening area is enhanced, the corrosion resistance is improved, and the service life of the graphite crucible 9 is prolonged.
Further, the metal receiver 7 is of a bowl-shaped structure with a wide upper part and a narrow lower part and is matched with the truncated cone-shaped groove area 6.
Further, the upper port of the metal receiver 7 is at least 2cm higher than the upper port of the truncated cone-shaped groove region 6, so that the operator can conveniently clamp the metal receiver during tapping, and meanwhile, impurities deposited at the bottom of the temperature sensing heating region 3 are prevented from entering the metal receiver 7.
Further, the vertical distance from the bottom surface of the truncated cone-shaped groove region 6 to the bottom surface of the graphite crucible 9 is at least the minimum distance from the inner wall of the cylindrical region 1 to the outer side wall of the graphite crucible 9; the vertical distance is not smaller than the lowest thickness of the graphite crucible 9, so that the uniformity of the overall thickness of the crucible is effectively ensured, and leakage caused by over-thin individual positions is avoided, and the actual service life of the crucible is further influenced.
Furthermore, the calibers of the upper ends of the truncated cone-shaped graphite thickening area 2 and the temperature sensing heating area 3 are larger than the calibers of the lower ends of the truncated cone-shaped graphite thickening area and the temperature sensing heating area; the lower end caliber of the graphite thickening area 2 is consistent with the upper end caliber of the temperature sensing heating area 3, the design of the upper width and the lower width is convenient for impurities such as slag in molten salt electrolyte to intensively settle at the bottom of the temperature sensing heating area 3, the later heating and cleaning are facilitated, meanwhile, the graphite crucible 9 consumes the most seriously at the middle lower part, and the corrosion resistance of the graphite crucible 9 is enhanced due to the increase of the thickness of the position, and the service life is prolonged accordingly.
During electrolysis, a cathode rod is inserted into the middle of the graphite crucible 9, and graphite anode sheets are hung on the periphery of the graphite crucible 9, so that an electrode is formed to generate an electric field, and the smelting temperature is above 1000 ℃. After rare earth oxide is added into a graphite crucible 9, high temperature and molten salt assist dissolution are carried out to dissolve the rare earth oxide, the precipitated rare earth metal ions tend to a cathode by the action of an electric field, and the precipitated oxygen reacts with graphite materials (carbon) in the crucible to form gas volatilization.
In general, the graphite crucible 9 used in rare earth molten salt electrolysis production is of a regular cylinder structure, in actual production, cathode bars are used as central axes to symmetrically distribute at least 2 groups of anode sheets, one end of each anode sheet is fixed on a fixture, and the anode sheets are suspended in electrolyte along the circumferential arrangement of the inner wall of the graphite crucible 9 by adjusting the positions of the fixtures. A metal receiver 7 with a regular cylinder shape is arranged at the right opposite position of the lower part of the cathode rod, metal liquid drops generated by reaction are enriched on the cathode rod, and the metal liquid drops fall into the metal receiver 7 from the bottom end of the cathode rod after reaching a certain weight.
In the production, an operator can judge the molten salt temperature of the low-temperature region of the graphite crucible 9 through the temperature data fed back by the temperature sensing element of the temperature sensing heating region 3, if the molten salt temperature is too high, the real-time voltage and current of power supply equipment are reduced, otherwise, if the temperature is too low, the annular heating coil 4 is electrified to heat the low-temperature region of the graphite crucible 9, thereby improving the reaction temperature of the graphite crucible and reducing the occurrence probability of slag formation and lifting.
Claims (9)
1. The novel lower heating graphite crucible comprises a graphite crucible (9), wherein the outside of the graphite crucible (9) is of a regular cylinder structure and is divided into a cylindrical region (1) for placing raw materials and electrolyte, a graphite thickening region (2), a temperature sensing heating region (3) and a truncated cone-shaped groove region (6) from top to bottom; anode strips which are arranged along the circumferential direction of the inner wall of the crucible are arranged in the cylindrical region (1); the bottom of the inner side of the truncated cone-shaped groove area (6) is provided with a metal receiver (7), and is characterized in that the temperature-sensing heating area (3) is nested with an annular heating coil (4); the two ports of the annular heating coil (4) are protruded out of the graphite crucible (9) and are connected with an alternating current power supply; an insulating member (8) is nested between two ports of the annular heating coil (4), an extending groove (5) is formed in the center of the insulating member (8) along the inner cavity direction of the graphite crucible (9), and a temperature sensing piece capable of measuring and feeding back the temperature of the bottom of the crucible is arranged in the extending groove (5).
2. A novel lower heating graphite crucible as claimed in claim 1, wherein the distance between the edge of the annular heating coil (4) and the outer surface of the inner cavity of the graphite crucible (9) is 15cm or more.
3. A novel lower heating graphite crucible as claimed in claim 1 or 2, wherein the distance between the inner cavity surface of the extension groove (5) and the inner cavity surface of the graphite crucible (9) is 15cm or more.
4. A novel lower heating graphite crucible as claimed in claim 3, wherein an included angle between the inner cavity surface of the graphite thickening area (2) and the central line of the graphite crucible (9) is 30-50 degrees, and an included angle between the temperature sensing heating area (3) and the central line of the graphite crucible (9) is 40-70 degrees.
5. A novel lower heating graphite crucible as claimed in claim 4, wherein the vertical height of the graphite thickening zone (2) and the temperature sensing heating zone (3) is 1/4 or more of the total height of the outside of the graphite crucible (9).
6. A new lower heating graphite crucible as claimed in claim 1 or 2, characterized in that the metal receiver (7) is of bowl-like configuration with a wide upper part and a narrow lower part and is matched with the truncated cone-shaped recess area (6).
7. A new lower heating graphite crucible as claimed in claim 6, characterised in that the upper port of the metal receiver (7) is at least 2cm higher than the upper port of the truncated cone-shaped recessed area (6).
8. A new lower heating graphite crucible as claimed in claim 1 or 2, characterized in that the vertical distance from the bottom surface of the conical recess area (6) to the bottom surface of the graphite crucible (9) is at least the minimum distance from the inner wall of the cylindrical area (1) to the outer side wall of the graphite crucible (9).
9. A novel lower heating graphite crucible as claimed in claim 1 or 2, wherein the upper port diameters of the truncated cone-shaped graphite thickening region (2) and the temperature sensing heating region (3) are larger than the lower port diameters thereof; the caliber of the lower end of the graphite thickening area (2) is consistent with the caliber of the upper end of the temperature sensing heating area (3).
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202210403280.5A CN114703512B (en) | 2022-04-18 | 2022-04-18 | Novel lower heating graphite crucible |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202210403280.5A CN114703512B (en) | 2022-04-18 | 2022-04-18 | Novel lower heating graphite crucible |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN114703512A CN114703512A (en) | 2022-07-05 |
| CN114703512B true CN114703512B (en) | 2024-06-25 |
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Family Applications (1)
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| CN202210403280.5A Active CN114703512B (en) | 2022-04-18 | 2022-04-18 | Novel lower heating graphite crucible |
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Citations (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN207159374U (en) * | 2017-09-03 | 2018-03-30 | 上犹东进稀土金属冶炼工贸有限公司 | A kind of multi-functional molten-salt electrolysis stove |
| CN210176971U (en) * | 2019-06-21 | 2020-03-24 | 江苏金石稀土有限公司 | Graphite crucible for rare earth molten salt electrolysis |
| CN217052442U (en) * | 2022-04-18 | 2022-07-26 | 山东南稀金石新材料有限公司 | Novel lower heating graphite crucible |
Family Cites Families (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| GB841551A (en) * | 1944-04-28 | 1960-07-20 | Frank A Newcombe | Electrolysis apparatus |
| CN106521560B (en) * | 2017-01-19 | 2018-12-25 | 包头市玺骏稀土有限责任公司 | A kind of liquid rare earth metal discharging device |
| KR101983999B1 (en) * | 2017-11-29 | 2019-05-30 | 한국생산기술연구원 | Molten salt electrorefiner |
| CN208685077U (en) * | 2018-07-12 | 2019-04-02 | 江西离子型稀土工程技术研究有限公司 | A kind of enhanced Rare Earth Electrolysis black-fead crucible |
| CN110578156A (en) * | 2019-10-17 | 2019-12-17 | 黄运蕉 | enhanced rare earth electrolysis graphite crucible |
| CN111876795B (en) * | 2020-07-28 | 2022-12-06 | 江苏金石稀土有限公司 | Method for recovering electrolyte in rare earth molten salt slag |
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2022
- 2022-04-18 CN CN202210403280.5A patent/CN114703512B/en active Active
Patent Citations (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN207159374U (en) * | 2017-09-03 | 2018-03-30 | 上犹东进稀土金属冶炼工贸有限公司 | A kind of multi-functional molten-salt electrolysis stove |
| CN210176971U (en) * | 2019-06-21 | 2020-03-24 | 江苏金石稀土有限公司 | Graphite crucible for rare earth molten salt electrolysis |
| CN217052442U (en) * | 2022-04-18 | 2022-07-26 | 山东南稀金石新材料有限公司 | Novel lower heating graphite crucible |
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| CN114703512A (en) | 2022-07-05 |
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