CN103290434A - Fused-salt electrolytic cell for producing rare earth metals and alloys - Google Patents
Fused-salt electrolytic cell for producing rare earth metals and alloys Download PDFInfo
- Publication number
- CN103290434A CN103290434A CN2013101449263A CN201310144926A CN103290434A CN 103290434 A CN103290434 A CN 103290434A CN 2013101449263 A CN2013101449263 A CN 2013101449263A CN 201310144926 A CN201310144926 A CN 201310144926A CN 103290434 A CN103290434 A CN 103290434A
- Authority
- CN
- China
- Prior art keywords
- electrolytic cell
- rare earth
- fused
- cell body
- alloy
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Pending
Links
Images
Landscapes
- Electrolytic Production Of Metals (AREA)
Abstract
The invention relates to a fused-salt electrolytic cell for producing rare earth metals and alloys, and the electrolytic cell comprises an electrolytic cell body, a cathode, an anode, a receiver, and a cover plate; and the electrolytic cell body is formed by nesting of a graphite inner liner, a carbon knotting layer, a fireproof heat-insulation layer, and a metal coat from inside to outside. The electrolytic cell is characterized in that, the sidewall of the electrolytic cell body is formed by two stages or more stages of arc surfaces which are connected with each other to form a closed state, and the electrolytic cell body is a non-enclosed type cell. The electrolytic cell has advantages of high current efficiency, a little amount of electrolytes for running a furnace, low unit consumption of graphite, long service life, balanced and steady quality of products, and low price; and the electrolytic cell is applicable to any scale productions greater than 1000 A, wherein the productions of rare earth metals and alloys are prepared by an electrolytic method of fluoride molten salt system oxide.
Description
Technical field
The present invention relates to a kind of fused-salt bath of producing rare earth metal and alloy, belong to the fused salt electrolysis technical field.
Technical background
Existing method of producing rare earth metal and alloy is mainly fluoride molten salt system oxide electrolysis method, its electrolyzer that has adopted mainly contains following several structure: the clear 61-253391 of (1) Japanese Patent, cell lining is made with metallic substance such as tungsten, molybdenums, because material very easily oxidations under hot conditions such as tungsten, molybdenum are so this electrolyzer is the closed cell of filling with inert gas; (2) the clear 62-146291 of Japanese Patent, cell lining is iron material or stainless material, when producing single rare earth metal, metal product will be polluted; (3) Chinese patent CN85100748A, cell lining are whole graphite, and the liner outside is made of graphite bisque, iron overcoat and thermal insulation layer.Because liner is that whole graphite is made, so the scale of this electrolyzer is subjected to the restriction of graphite size, and constant product quality is poor; (4) Chinese patent 98104785.8, and cell lining is built by laying bricks or stones by having the emboss pit graphite block, and the outside is carbonaceous material or carbonaceous compound knotting layer, flame-proof thermal insulation material, structured metal layer and thermal insulation layer.This electrolyzer can be built by laying bricks or stones according to scale, less expensive, but the electric force lines distribution of electrolyzer is even inadequately, make raw material easily be deposited in the edge of cell body, and blow-on ionogen consumption is big, and then influence the unit consumption of current efficiency and graphite anode.
Summary of the invention
The objective of the invention is in order to overcome the deficiency of above-mentioned electrolyzer, provide a kind of and have the current efficiency height, blow-on ionogen consumption is little, the graphite unit consumption is low, the quality product equalization stable of long service life, production, cheap unsealed production rare earth metal and the fused-salt bath of alloy.
The objective of the invention is to be realized by following mode:
The present invention includes electrolyzer cell body, negative electrode, anode, receptor, cover plate, the electrolyzer cell body is by graphite liner, carbon knotting layer, refractory insulating layer, metal-coating nested forming from inside to outside, it is characterized in that: the sidewall of electrolyzer cell body is to be connected mutually by the arc surface more than two sections or two sections to surround closed form, and the electrolyzer cell body is non-hermetic type.
Described graphite liner is pegged graft to build by laying bricks or stones by the graphite block of band tongue and groove and is formed;
The material of the carbon knotting layer of described liner outside is made of following ingredients: Graphite Powder 99 1 ~ 95 wt.%, graphite glue 1 ~ 95 wt.%, coke 1 ~ 95 wt.%, blue carbon 0 ~ 95 wt.%, petroleum pitch 1 ~ 70 wt.%, coal-tar pitch 1 ~ 70 wt.% is provided with anti oxidation layer on the top of graphite liner, and anti oxidation layer is made of 0 ~ 100% rare earth oxide and 0 ~ 100% rare earth fluorine; Cathode and anode all adopts upper plug type to arrange that its depth of penetration is adjustable continuously in 10 ~ 1200mm scope, and the pole span between the cathode and anode is regulated in 20 ~ 420mm scope; The cross section of cathode and anode is geometrical shapies such as circle, ellipse, rectangle, square; Receptor can be geometrical shapies such as circle, ellipse, rectangle, square.
The fused-salt bath of described production rare earth metal and alloy, the cathode current density of its work are 3 ~ 20A/cm
2, anodic current density is 0.1 ~ 2A/cm
2, electrolysis temperature is 700 ~ 1300 ℃.
Advantage of the present invention is: the sidewall of electrolyzer cell body is connected " Pear-Shaped " that surrounds closed form mutually by the arc surface more than two sections or two sections, the shape that it is special, make that it has the current efficiency height, blow-on ionogen consumption is little, the graphite unit consumption is low, long service life, the quality product equalization stable of production, cheap advantage, the layout of anode and cathode upper plug type and depth of penetration and pole span adjustable continuously, make pole span to remain unchanged along with the consumption of anode, and the anode and cathode configuration rationally.The present invention is applicable to that the above any scale fluoride molten salt system oxide electrolysis of 1000A prepares rare earth metal and alloy production, and electrolyzer can be 3 ~ 20A/cm in cathode current density
2, anodic current density is 0.1 ~ 2A/cm
2, electrolysis temperature is steady operation in 700 ~ 1300 ℃ of scopes.
Description of drawings
Fig. 1 is structural representation of the present invention;
Fig. 2 is the vertical view of Fig. 1.
Among the figure: 1, graphite liner, 2, carbon knotting layer, 3, refractory insulating layer, 4, metal-coating, 5, receptor, 6, anti oxidation layer, 7, cover plate, 8, negative electrode, 9, anode.
Embodiment
Embodiment
The present invention includes electrolyzer cell body, negative electrode 8, anode 9, receptor 5, cover plate 7, the electrolyzer cell body is by graphite liner 1, carbon knotting layer 2, refractory insulating layer 3, metal-coating 4 nested forming from inside to outside, the sidewall of electrolyzer cell body is to be connected mutually by the arc surface more than two sections or two sections to surround closed form, and the electrolyzer cell body is non-hermetic type; The graphite liner is built by laying bricks or stones by the graphite block of band tongue and groove and is formed, and the top of graphite liner is provided with anti oxidation layer 6, and negative electrode and receptor are made by tungsten, and negative electrode is selected circular configuration for use, and anode is selected circle and rectangle structure, disposes three tungsten cathodes.Fluoride molten salt system composition range of choice is: 75 ~ 98%(wt.%) REF
3, 2 ~ 25%(wt.%) LiF.Feed direct current, electrolysis temperature is 1050 ± 30 ℃, and cathode current density is 3 ~ 20A/cm
2, anodic current density is 0.1 ~ 2 A/cm
2, depth of penetration is 10 ~ 1200mm, pole span is 20 ~ 420mm.The electrolysate neodymium metal is separated out at negative electrode, falls in the receptor along negative electrode then.Electrolysis 30 days, current efficiency are 87%, and the rare earth yield is 95%, and the composition of gained neodymium metal is pressed mass ratio: C＜0.05%, Si＜0.05%, Fe＜0.05%, RE〉99%.
Claims (6)
1. fused-salt bath of producing rare earth metal and alloy, comprise electrolyzer cell body, negative electrode, anode, receptor, cover plate, the electrolyzer cell body is by graphite liner, carbon knotting layer, refractory insulating layer, metal-coating nested forming from inside to outside, it is characterized in that: the sidewall of electrolyzer cell body is to be connected mutually by the arc section more than two sections or two sections to surround closed form, and the electrolyzer cell body is non-hermetic type.
2. the fused-salt bath of production rare earth metal according to claim 1 and alloy is characterized in that: described graphite liner is pegged graft to build by laying bricks or stones by the graphite block of band tongue and groove and is formed.
3. the fused-salt bath of production rare earth metal according to claim 1 and alloy, it is characterized in that: cathode and anode all adopts upper plug type to arrange, its depth of penetration is adjustable continuously in 10 ~ 1200mm scope, and the pole span between the cathode and anode is regulated in 20 ~ 420mm scope.
4. the fused-salt bath of production rare earth metal according to claim 3 and alloy is characterized in that: the cross section of cathode and anode is circular, oval, rectangle or square.
5. the fused-salt bath of production rare earth metal according to claim 1 and alloy is characterized in that: receptor is circular, oval, rectangle or square.
6. according to the fused-salt bath of the described production rare earth metal of claim 1 ~ 5 and alloy, it is characterized in that: the cathode current density of its work is 3 ~ 20A/cm
2, anodic current density is 0.1 ~ 2A/cm
2, electrolysis temperature is 700 ~ 1300 ℃.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN2013101449263A CN103290434A (en) | 2013-04-24 | 2013-04-24 | Fused-salt electrolytic cell for producing rare earth metals and alloys |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN2013101449263A CN103290434A (en) | 2013-04-24 | 2013-04-24 | Fused-salt electrolytic cell for producing rare earth metals and alloys |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN103290434A true CN103290434A (en) | 2013-09-11 |
Family
ID=49091944
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN2013101449263A Pending CN103290434A (en) | 2013-04-24 | 2013-04-24 | Fused-salt electrolytic cell for producing rare earth metals and alloys |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN103290434A (en) |
Cited By (9)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN103614747A (en) * | 2013-12-17 | 2014-03-05 | 包头市玺骏稀土有限责任公司 | Large combined rare earth fused salt electrolytic bath system |
| CN103741170A (en) * | 2014-01-15 | 2014-04-23 | 广西贺州金广稀土新材料有限公司 | Arcing and electrolysis integrated furnace for preparing rare earth metal |
| CN107130267A (en) * | 2017-06-27 | 2017-09-05 | 包头稀土研究院 | Fused salt electrolysis process produces the device of metal or alloy |
| CN109706483A (en) * | 2019-03-19 | 2019-05-03 | 中国科学院青海盐湖研究所 | Large capacity Rare Earth Electrolysis slot device |
| CN109750326A (en) * | 2019-03-25 | 2019-05-14 | 江苏金石稀土有限公司 | A method of improving graphite crucible service life in molten-salt electrolysis reaction |
| WO2019128826A1 (en) * | 2017-12-29 | 2019-07-04 | 中南大学 | Rare earth metal molten salt electrolytic cell |
| CN110983382A (en) * | 2019-11-22 | 2020-04-10 | 乐山有研稀土新材料有限公司 | Rare earth electrolytic cell repair paste and furnace shutdown repair method |
| CN111778524A (en) * | 2020-07-28 | 2020-10-16 | 吴高武 | Leak-proof rare earth metal electrolytic tank device |
| CN113337851A (en) * | 2021-03-31 | 2021-09-03 | 包头瑞鑫稀土金属材料股份有限公司 | Large-size cathode rare earth molten salt electrolytic cell |
Citations (7)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPS63169397A (en) * | 1986-12-29 | 1988-07-13 | Asahi Chem Ind Co Ltd | Production of rare earth metal |
| US5091065A (en) * | 1986-12-23 | 1992-02-25 | Showa Denko K.K. | Process for preparation of neodymium or neodymium-iron alloy |
| CN1226612A (en) * | 1998-02-20 | 1999-08-25 | 包头钢铁公司稀土研究院 | Molten salt electrolytic cells for producing rare-earth metals and alloys |
| CN2372329Y (en) * | 1998-02-20 | 2000-04-05 | 包头钢铁公司稀土研究院 | Molten-salt electrolytic cell for producing rare metal and rare earth alloy |
| CN2632099Y (en) * | 2002-07-09 | 2004-08-11 | 赣州科力稀土新材料有限公司 | Circular 10 thousand A electrolyzing tank for producing rare earth metals by molten salt process |
| CN101117723A (en) * | 2007-07-30 | 2008-02-06 | 赣南师范学院 | Method for preparing Gd-Mg intermediate alloy by fluorination system coelectrodeposition |
| CN203360596U (en) * | 2013-04-24 | 2013-12-25 | 包头瑞鑫稀土金属材料股份有限公司 | Molten salt electrolytic bath for producing rare-earth metal and alloy |
-
2013
- 2013-04-24 CN CN2013101449263A patent/CN103290434A/en active Pending
Patent Citations (7)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US5091065A (en) * | 1986-12-23 | 1992-02-25 | Showa Denko K.K. | Process for preparation of neodymium or neodymium-iron alloy |
| JPS63169397A (en) * | 1986-12-29 | 1988-07-13 | Asahi Chem Ind Co Ltd | Production of rare earth metal |
| CN1226612A (en) * | 1998-02-20 | 1999-08-25 | 包头钢铁公司稀土研究院 | Molten salt electrolytic cells for producing rare-earth metals and alloys |
| CN2372329Y (en) * | 1998-02-20 | 2000-04-05 | 包头钢铁公司稀土研究院 | Molten-salt electrolytic cell for producing rare metal and rare earth alloy |
| CN2632099Y (en) * | 2002-07-09 | 2004-08-11 | 赣州科力稀土新材料有限公司 | Circular 10 thousand A electrolyzing tank for producing rare earth metals by molten salt process |
| CN101117723A (en) * | 2007-07-30 | 2008-02-06 | 赣南师范学院 | Method for preparing Gd-Mg intermediate alloy by fluorination system coelectrodeposition |
| CN203360596U (en) * | 2013-04-24 | 2013-12-25 | 包头瑞鑫稀土金属材料股份有限公司 | Molten salt electrolytic bath for producing rare-earth metal and alloy |
Non-Patent Citations (2)
| Title |
|---|
| 王春慧: ""10KA底部阴极稀土熔盐电解槽槽型设计"", 《万方学位论文》, 30 October 2009 (2009-10-30), pages 1 - 59 * |
| 石富: ""稀土电解槽的研究现状及发展趋势"", 《中国稀土学报》, vol. 25, 31 December 2007 (2007-12-31), pages 70 - 76 * |
Cited By (12)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN103614747A (en) * | 2013-12-17 | 2014-03-05 | 包头市玺骏稀土有限责任公司 | Large combined rare earth fused salt electrolytic bath system |
| CN103614747B (en) * | 2013-12-17 | 2016-04-06 | 包头市玺骏稀土有限责任公司 | Large-scale combined rare earth molten salt electrolytic system |
| CN103741170A (en) * | 2014-01-15 | 2014-04-23 | 广西贺州金广稀土新材料有限公司 | Arcing and electrolysis integrated furnace for preparing rare earth metal |
| CN103741170B (en) * | 2014-01-15 | 2016-02-24 | 广西贺州金广稀土新材料有限公司 | One is prepared rare earth metal and is beaten arc electrolysis all-in-one oven |
| CN107130267A (en) * | 2017-06-27 | 2017-09-05 | 包头稀土研究院 | Fused salt electrolysis process produces the device of metal or alloy |
| WO2019128826A1 (en) * | 2017-12-29 | 2019-07-04 | 中南大学 | Rare earth metal molten salt electrolytic cell |
| CN109706483A (en) * | 2019-03-19 | 2019-05-03 | 中国科学院青海盐湖研究所 | Large capacity Rare Earth Electrolysis slot device |
| CN109750326A (en) * | 2019-03-25 | 2019-05-14 | 江苏金石稀土有限公司 | A method of improving graphite crucible service life in molten-salt electrolysis reaction |
| CN110983382A (en) * | 2019-11-22 | 2020-04-10 | 乐山有研稀土新材料有限公司 | Rare earth electrolytic cell repair paste and furnace shutdown repair method |
| CN110983382B (en) * | 2019-11-22 | 2021-09-03 | 乐山有研稀土新材料有限公司 | Rare earth electrolytic cell repair paste and furnace shutdown repair method |
| CN111778524A (en) * | 2020-07-28 | 2020-10-16 | 吴高武 | Leak-proof rare earth metal electrolytic tank device |
| CN113337851A (en) * | 2021-03-31 | 2021-09-03 | 包头瑞鑫稀土金属材料股份有限公司 | Large-size cathode rare earth molten salt electrolytic cell |
Similar Documents
| Publication | Publication Date | Title |
|---|---|---|
| CN103290434A (en) | Fused-salt electrolytic cell for producing rare earth metals and alloys | |
| US11001931B2 (en) | Systems and methods for purifying aluminum | |
| EP1927679B1 (en) | Electrolysis cell for the production of aluminium comprising means to reduce the voltage drop | |
| CN203360596U (en) | Molten salt electrolytic bath for producing rare-earth metal and alloy | |
| CN101949034A (en) | Cathode graphitizing current stop block for aluminum electrolysis | |
| CN105256337B (en) | A kind of novel rare-earth electrolytic cell | |
| CN104047025B (en) | The system and method for protecting electrolytic cell side wall | |
| CN108193235A (en) | A kind of rare earth electrolysis cell electrode structure and rare earth electrolysis cell | |
| CN200952043Y (en) | Liquid cathode electrolytic tank for electrolytic production rare earth metal and alloy thereof | |
| CN1090247C (en) | Molten salt electrolytic cells for producing rare-earth metals and alloys | |
| CN205241811U (en) | Tombarthite fused salt electrolysis groove of liquid negative pole production rare earth metal and alloy | |
| CN105441987A (en) | Rare earth fused-salt electrolysis cell for producing rare earth metals and alloys by using liquid cathode | |
| CN104451786A (en) | Electrolytic cell for low-energy extraction of rare-earth metals | |
| CA1224746A (en) | Cell for the refining of aluminum | |
| CN107541755B (en) | A kind of internal heating type fused-salt bath | |
| CN201305637Y (en) | Rare earth electrolysis cell | |
| CN103993332B (en) | A kind of energy-saving aluminum cell and its interpole | |
| CN103060853A (en) | Method for preparing Ho-Fe alloy through molten salt electrolysis | |
| CN102925931B (en) | Negative electrode rare earth molten salt electrolytic under submergence type is inserted in side | |
| GB208717A (en) | Improvements in or relating to electrolytic refining of aluminium | |
| CN208362485U (en) | A kind of energy-saving Wan An training rare earth molten salt electrolytic system | |
| CN204342893U (en) | A kind of rare earth molten salt electrolytic producing rare earth metal and alloy | |
| CN104372382A (en) | Rare earth molten salt electrolytic tank for producing rare earth metals and alloys | |
| RU2657395C1 (en) | Electrolyzer for obtaining aluminum | |
| CN105780053A (en) | Aluminum electrolysis method with aluminum as cathode |
Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| C06 | Publication | ||
| PB01 | Publication | ||
| C10 | Entry into substantive examination | ||
| SE01 | Entry into force of request for substantive examination | ||
| C02 | Deemed withdrawal of patent application after publication (patent law 2001) | ||
| WD01 | Invention patent application deemed withdrawn after publication |
Application publication date: 20130911 |