WO2006003864A1 - 溶融塩電解による金属の製造方法および製造装置 - Google Patents
溶融塩電解による金属の製造方法および製造装置 Download PDFInfo
- Publication number
- WO2006003864A1 WO2006003864A1 PCT/JP2005/011747 JP2005011747W WO2006003864A1 WO 2006003864 A1 WO2006003864 A1 WO 2006003864A1 JP 2005011747 W JP2005011747 W JP 2005011747W WO 2006003864 A1 WO2006003864 A1 WO 2006003864A1
- Authority
- WO
- WIPO (PCT)
- Prior art keywords
- metal
- cathode
- molten salt
- chamber
- electrolytic
- Prior art date
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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
- C25C7/007—Constructional parts, or assemblies thereof, of cells; Servicing or operating of cells of cells comprising at least a movable electrode
-
- 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
-
- 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
- C25C7/06—Operating or servicing
- C25C7/08—Separating of deposited metals from the cathode
Definitions
- the present invention relates to recovery of a metal from a metal salt deposit, and more particularly to a method and an apparatus for producing a metal by electrolysis of a molten salt containing a metal chloride.
- the conventional method has a problem that it is difficult to recover an active metal such as calcium metal alone or the cost is high even if it is possible.
- Patent Literature l WO99Z064638
- Patent Document 2 Japanese Patent Laid-Open No. 2003-129268
- Patent Document 3 Japanese Patent Laid-Open No. 2003-306725
- Patent Document 4 US3226311
- the present invention has been made in view of the above situation.
- a metal used for reducing metal oxides or salts of metal titanium can be recovered in a solid state.
- the object is to provide a method for producing a metal by molten salt electrolysis that can be carried out by an inexpensive method!
- an electrolytic bath provided with an anode and a cathode is filled with a metal salt and the metal salt is heated and melted to form an electrolytic bath.
- the electrolytic bath is electrolyzed to deposit metal in a solid state on the cathode.
- a metal can be deposited on a cathode in a solid state having low solubility in a molten salt and recovered.
- metal recovery can be performed at low cost.
- the present invention fills an electrolytic cell equipped with an anode and a cathode with a metal salt, heats and melts the metal chloride to form an electrolytic bath, and electrolyzes the electrolytic bath to remove the metal.
- An apparatus for producing metal by molten salt electrolysis that deposits on a negative electrode in a solid state in which an electrolytic bath is divided into an electrolytic chamber and a melting chamber by partition walls, an anode is placed in the electrolytic chamber, and a cathode is connected to the electrolytic chamber and the melting chamber. It is arranged so that it can circulate and revolve, and the metal deposited and deposited on the cathode in the electrolysis chamber is separated and collected in the dissolution chamber! /
- the cathode when the cathode passes through the electrolytic chamber, electrolysis of the metal chloride proceeds to deposit metal on the cathode, and when the cathode passes through the melting chamber, the deposited metal is recovered. Since the cathode revolves and periodically moves back and forth between the electrolysis chamber and the melting chamber, metal deposition and recovery can be performed automatically and efficiently.
- reference numeral 1 denotes an electrolytic cell, which is filled with an electrolytic bath 2 that also has salty calcium strength, and is heated to a temperature higher than the melting point of salty calcium by a heating means (not shown). It is kept in a molten state.
- Reference numeral 3 is an anode and reference numeral 4 is a cathode, which is immersed in the electrolytic bath 2.
- the present invention can be efficiently carried out even when the temperature of the electrolytic bath 2 is within the temperature range of! /, Which is equal to or higher than the melting point (845 ° C) of the metallic calcium 5.
- the metallic calcium 5 can be deposited in a solid state on the surface of the cathode 4.
- the solid metal calcium 5 can be deposited around the cathode 4 by incorporating the cooling structure in the cathode 4.
- the cathode 4 After depositing a predetermined amount of metallic calcium 5 on the cathode 4, the cathode 4 was removed from the electrolytic bath 2, and the molten salt 6 maintained at a temperature higher than the melting point (845 ° C) of the metallic calcium 5 was retained. Immerse in collection tank 7. The metal calcium 5 deposited on the cathode 4 is partially dissolved in the molten salt 6 held in the recovery tank 7, and the rest melts and floats on the cathode 4 and is concentrated near the liquid level in the recovery tank 7. This is separated and recovered. At this time, the molten salt 6 promotes the evaporation loss of the metal calcium 5 as the temperature increases, so it is practical to keep it within 900 ° C.
- the calcium can be melted and floated and recovered in a liquid state.
- the molten salt 6 may be cooled below the melting point of metallic calcium as long as it does not solidify.
- the floated metallic calcium 5 becomes a solid state and can be efficiently recovered. Since the melting point of calcium chloride is around 780 ° C and the melting point of metallic calcium is around 845 ° C, the metallic calcium dissolved in the molten salt 6 can be reduced by reducing the temperature of the recovery tank 7 to around 800 ° C. 5 can be recovered in the solid state.
- the cathode 4 from which the precipitated metallic calcium 5 has been desorbed and recovered can be returned from the recovery tank 7 to the electrolytic tank 1 and again subjected to molten salt electrolysis.
- metal calcium can be efficiently recovered.
- the metal calcium 5 produced in the recovery tank 7 in this way can be used, for example, for the calcium reduction of tetrasalt titanium using a molten salt.
- the chlorine gas 8 generated in the anode 3 of the electrolytic cell 1 can be separately collected and reused for the chlorination reaction of titanium ore. Or you may utilize for another use.
- the material of the anode 3 is preferably a material that is conductive, does not dissolve in the electrolytic bath, and does not react with chlorine gas. Carbon is preferred as such a material!
- the cathode 4 may be made of any material such as carbon steel, stainless steel, copper, or aluminum, as long as it is made of a conductive material. It is preferable that the cathode 4 has a structure in which a cooling medium can flow inside. By taking such a structure, deposition of metallic calcium on the cathode 4 can be promoted.
- salt calcium is also produced as a by-product in the molten salt electrolysis process of salt titanium and metal calcium, so if molten salt 6 is used as salt calcium, the concentrated metal calcium is melted into salt titanium. When used in the salt electrolysis process, it is not necessary to remove calcium chloride. In addition, after the molten salt electrolysis process of titanium salt titanium, it is also a power that can be recycled to the electrolytic cell 1 together with salt salt calcium which is a by-product of this step.
- the melting point of the electrolytic bath can be lowered by adding potassium salt to potassium salt constituting the electrolytic bath 2.
- the salty potassium added to the salty calcium is 20% to 80% by weight. It is preferable to set it as the range of quantity%. By adding potassium salt in such a range, even if the temperature of electrolytic bath 2 is lowered by 150 ° C to 250 ° C below the melting point of metallic calcium, stable operation can be performed without fear of freezing the electrolytic bath. It can be carried out.
- the temperature of the electrolytic bath 2 can be controlled to a target temperature range by using a heating partner with a cooling function immersed in the electrolytic bath (not shown).
- the temperature of electrolytic bath 2 may be controlled by other means.
- FIG. 2 represents another embodiment of the present invention.
- the electrolytic bath 1 in FIG. 2 (a) is filled with an electrolytic bath 2 that also has calcium chloride power, and is heated to a melting point or higher of salt calcium by a heating means (not shown) and kept in a molten state.
- an anode 3 and a cylindrical cathode 4 are immersed in the electrolytic bath 2.
- the cathode 4 is configured to be capable of rotating, and a scraper 9 is disposed adjacent to one end of the cylindrical side surface of the cathode 4.
- FIG. 2 (b) is a schematic view of the cathode 4 and the collector 9 in the direction A force. As shown in the figure, when the cathode 4 rotates, the metallic calcium 5 deposited on the cathode surface can be efficiently scraped by the scraper 9.
- Cathode 4 Force Solid metal calcium 5 taken off has a lower density than calcium chloride, and therefore floats on the bath surface of electrolytic bath 2.
- the metallic calcium 5 floating on the bath surface of the electrolytic bath 2 is appropriately recovered from the electrolytic bath 2.
- the solid metallic calcium recovered from the electrolytic bath 2 can be used as a reducing agent for titanium oxide by molten salt electrolysis.
- a net-like ridge may be provided around the rake device 9.
- the precipitated solid metal can be efficiently recovered by pulling up the soot from the electrolytic bath in a timely manner.
- a partition wall 10 is disposed in the vicinity of the bath surface of the electrolytic bath 2.
- the metallic calcium deposited on the cathode 4 is scraped off, then floats up and diffuses to the bath surface, reaches the vicinity of the anode 3 and tends to react with the chlorine gas generated at the anode 3,
- diffusion of the floating metal calcium 5 can be prevented and the reverse reaction can be effectively suppressed.
- a heater may be immersed in the vicinity of the scraper 9, and the temperature of the electrolytic bath in the vicinity of the scraper 9 may be limitedly kept above the melting point of metallic calcium.
- the metallic calcium taken from the cathode 4 can be recovered in a molten state.
- Gold in the molten state A part of the genus calcium is dissolved in calcium chloride and floats in the electrolytic bath 2.
- the calcium chloride salt enriched with metallic calcium floats on the bath surface of the electrolytic bath 2 through the partition wall 10.
- Calcium chloride enriched in floating metal calcium can be extracted and used, for example, for the reduction of tetrasalt-titanium.
- FIGS. 3 (a) to (c) show other embodiments of the present invention.
- Fig. 3 (b) is a schematic view of Fig. 3 (a) viewed from the direction A
- Fig. 3 (c) is a schematic view of Fig. 3 (a) also viewed in the direction B force.
- the electrolytic cell 1 in FIG. 3 is filled with an electrolytic bath 2 having a salty calcium strength, and is heated to a melting point or higher of salty calcium by a heating means (not shown) and kept in a molten state.
- an anode 3 and a cathode 4 are immersed in the electrolytic bath 2 .
- the electrolytic cell 1 is divided into an electrolytic chamber la in which the anode 3 is immersed and a melting chamber lb by a partition wall 10 provided near the bath surface of the electrolytic bath 2. However, only the vicinity of the bath surface of the upper part of the electrolytic bath 2 is divided by the partition wall 10 and is integrated in the lower part of the electrolytic bath 2. As shown in FIG. 3 (c), a plurality of cathodes 4 are arranged so that they can circulate through the electrolysis chamber la and the melting chamber lb. These cathodes 4 can pass through a cutting portion provided in a part of the partition wall 10 and circulate through the electrolytic chamber and the melting chamber to revolve.
- the cathode 4 has a heating function and a cooling function.
- the cathode 4 is provided with a flow path through which a heater and a cooling medium can be circulated, and the temperature of the cathode 4 can be arbitrarily controlled to be equal to or lower than the melting point of the metal calcium 5. ing.
- the cathode 4 when the cathode 4 is on the electrolysis chamber side, the temperature of the cathode 4 is kept below the melting point of metallic calcium, and metallic calcium is deposited on the surface of the cathode 4 in a solid state.
- the cathode 4 revolves and reaches the melting chamber side, the temperature of the cathode 4 is maintained above the melting point of metal calcium, and the precipitated metallic calcium is brought into a molten state.
- Part of the metallic calcium 5 melted and separated from the cathode 4 is dissolved in calcium chloride and floats in the electrolytic bath to form a concentrated metallic calcium layer.
- the metal calcium concentrated layer formed on the dissolution chamber side bath surface of the electrolytic bath 2 can be appropriately extracted and used as, for example, a reducing agent for titanium oxide by molten salt electrolysis.
- the temperature of the cathode 4 varies depending on the position of the cathode 4 that revolves inside the electrolytic bath 2.
- metallic calcium can be efficiently recovered.
- salt calcium carbonate is used in an electrolytic bath, and this is melt-electrolyzed to deposit metallic calcium continuously on the cathode, and this is scraped off by a scraper.
- the solid state calcium metal was recovered.
- the production amount of metallic calcium per unit time increased about twice as much as that in Example 1.
- metallic calcium can be efficiently produced by electrolysis of calcium chloride.
- FIG. 1 is a schematic diagram showing a method for producing metallic calcium in an embodiment of the present invention.
- FIG. 2 (a) is a schematic diagram showing a method for producing metallic calcium in another embodiment of the present invention, and (b) is a schematic diagram of a collector at the cathode when (a) is also viewed in the direction A force.
- FIG. 2 (a) is a schematic diagram showing a method for producing metallic calcium in another embodiment of the present invention, and (b) is a schematic diagram of a collector at the cathode when (a) is also viewed in the direction A force.
- FIG. 3 (a) is a schematic diagram showing a method for producing metallic calcium in another embodiment of the present invention, (b) is a schematic diagram showing (a) also in the direction A force, and (c) is a schematic diagram.
- FIG. 5 is a schematic view of (a) as viewed from direction B.
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- Chemical & Material Sciences (AREA)
- Engineering & Computer Science (AREA)
- Chemical Kinetics & Catalysis (AREA)
- Electrochemistry (AREA)
- Materials Engineering (AREA)
- Metallurgy (AREA)
- Organic Chemistry (AREA)
- Electrolytic Production Of Metals (AREA)
Abstract
Description
Claims
Priority Applications (3)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
JP2006528672A JP4658053B2 (ja) | 2004-06-30 | 2005-06-27 | 溶融塩電解による金属の製造方法および製造装置 |
US11/631,364 US20090211916A1 (en) | 2004-06-30 | 2005-06-27 | Method and apparatus for producing metal by electrolysis of molton salt |
EP05765165A EP1785509A4 (en) | 2004-06-30 | 2005-06-27 | PROCESS AND APPARATUS FOR PRODUCING METAL BY MELT SALT ELECTROLYSIS |
Applications Claiming Priority (2)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
JP2004192905 | 2004-06-30 | ||
JP2004-192905 | 2004-06-30 |
Publications (1)
Publication Number | Publication Date |
---|---|
WO2006003864A1 true WO2006003864A1 (ja) | 2006-01-12 |
Family
ID=35782673
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
PCT/JP2005/011747 WO2006003864A1 (ja) | 2004-06-30 | 2005-06-27 | 溶融塩電解による金属の製造方法および製造装置 |
Country Status (5)
Country | Link |
---|---|
US (1) | US20090211916A1 (ja) |
EP (1) | EP1785509A4 (ja) |
JP (1) | JP4658053B2 (ja) |
AU (1) | AU2005258596A1 (ja) |
WO (1) | WO2006003864A1 (ja) |
Cited By (5)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
WO2008102520A1 (ja) * | 2007-02-19 | 2008-08-28 | Toho Titanium Co., Ltd. | 溶融塩電解による金属の製造装置およびこれを用いた金属の製造方法 |
WO2009008121A1 (ja) * | 2007-07-12 | 2009-01-15 | Toho Titanium Co., Ltd. | 高純度金属カルシウムの製造方法、同高純度金属カルシウムを用いた金属チタンの製造方法および同高純度金属カルシウムの製造装置 |
JP2009144176A (ja) * | 2007-12-11 | 2009-07-02 | Toho Titanium Co Ltd | 金属カルシウムの製造方法および溶融塩電解装置 |
JP2009287045A (ja) * | 2008-05-27 | 2009-12-10 | Toho Titanium Co Ltd | 金属カルシウムの製造方法および製造装置 |
US11585003B2 (en) | 2016-03-25 | 2023-02-21 | Elysis Limited Partnership | Electrode configurations for electrolytic cells and related methods |
Families Citing this family (2)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
CN107385474B (zh) * | 2017-08-04 | 2018-10-12 | 中南大学 | 一种氯化钙熔盐电解制钙用电解质及使用该电解质的电解方法 |
US20230279572A1 (en) * | 2022-04-26 | 2023-09-07 | Case Western Reserve University | System and process for sustainable electrowinning of metal |
Citations (4)
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US3043756A (en) | 1958-07-31 | 1962-07-10 | Dow Chemical Co | Calcium metal production |
JPS5443811A (en) | 1977-09-16 | 1979-04-06 | Asahi Glass Co Ltd | Production of metallic lithium |
JPH1053888A (ja) | 1996-08-12 | 1998-02-24 | Central Res Inst Of Electric Power Ind | 溶融塩電解装置における被回収金属物質の回収方法及び装置 |
JP2002129250A (ja) | 2000-10-30 | 2002-05-09 | Katsutoshi Ono | 金属チタンの製造方法 |
Family Cites Families (7)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
US2344859A (en) * | 1941-02-07 | 1944-03-21 | Abraham L Fox | Method of producing calcium boride |
US2960397A (en) * | 1958-09-03 | 1960-11-15 | Dow Chemical Co | Separation of calcium metal from contaminants |
ES257371A1 (es) * | 1959-05-13 | 1960-11-16 | Solvay | Procedimiento para la preparaciën de un metal alcalino-terreo por electrëlisis de banos de cloruros fundidos |
CA2012009C (en) * | 1989-03-16 | 1999-01-19 | Tadashi Ogasawara | Process for the electrolytic production of magnesium |
GB9812169D0 (en) * | 1998-06-05 | 1998-08-05 | Univ Cambridge Tech | Purification method |
JP2003129268A (ja) * | 2001-10-17 | 2003-05-08 | Katsutoshi Ono | 金属チタンの精錬方法及び精錬装置 |
NO318164B1 (no) * | 2002-08-23 | 2005-02-07 | Norsk Hydro As | Metode for elektrolytisk produksjon av aluminiummetall fra en elektrolytt samt anvendelse av samme. |
-
2005
- 2005-06-27 AU AU2005258596A patent/AU2005258596A1/en not_active Abandoned
- 2005-06-27 JP JP2006528672A patent/JP4658053B2/ja not_active Expired - Fee Related
- 2005-06-27 EP EP05765165A patent/EP1785509A4/en not_active Withdrawn
- 2005-06-27 WO PCT/JP2005/011747 patent/WO2006003864A1/ja active Application Filing
- 2005-06-27 US US11/631,364 patent/US20090211916A1/en not_active Abandoned
Patent Citations (4)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
US3043756A (en) | 1958-07-31 | 1962-07-10 | Dow Chemical Co | Calcium metal production |
JPS5443811A (en) | 1977-09-16 | 1979-04-06 | Asahi Glass Co Ltd | Production of metallic lithium |
JPH1053888A (ja) | 1996-08-12 | 1998-02-24 | Central Res Inst Of Electric Power Ind | 溶融塩電解装置における被回収金属物質の回収方法及び装置 |
JP2002129250A (ja) | 2000-10-30 | 2002-05-09 | Katsutoshi Ono | 金属チタンの製造方法 |
Non-Patent Citations (1)
Title |
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See also references of EP1785509A4 |
Cited By (7)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
WO2008102520A1 (ja) * | 2007-02-19 | 2008-08-28 | Toho Titanium Co., Ltd. | 溶融塩電解による金属の製造装置およびこれを用いた金属の製造方法 |
EP2123798A1 (en) * | 2007-02-19 | 2009-11-25 | Toho Titanium CO., LTD. | Apparatus for producing metal by molten salt electrolysis, and process for producing metal using the apparatus |
EP2123798A4 (en) * | 2007-02-19 | 2010-03-17 | Toho Titanium Co Ltd | DEVICE FOR PRODUCING METAL BY MELT FLUOR ELECTROLYSIS AND METHOD FOR PRODUCING METAL USING THE DEVICE |
WO2009008121A1 (ja) * | 2007-07-12 | 2009-01-15 | Toho Titanium Co., Ltd. | 高純度金属カルシウムの製造方法、同高純度金属カルシウムを用いた金属チタンの製造方法および同高純度金属カルシウムの製造装置 |
JP2009144176A (ja) * | 2007-12-11 | 2009-07-02 | Toho Titanium Co Ltd | 金属カルシウムの製造方法および溶融塩電解装置 |
JP2009287045A (ja) * | 2008-05-27 | 2009-12-10 | Toho Titanium Co Ltd | 金属カルシウムの製造方法および製造装置 |
US11585003B2 (en) | 2016-03-25 | 2023-02-21 | Elysis Limited Partnership | Electrode configurations for electrolytic cells and related methods |
Also Published As
Publication number | Publication date |
---|---|
JP4658053B2 (ja) | 2011-03-23 |
AU2005258596A1 (en) | 2006-01-12 |
JPWO2006003864A1 (ja) | 2008-04-17 |
US20090211916A1 (en) | 2009-08-27 |
EP1785509A1 (en) | 2007-05-16 |
EP1785509A4 (en) | 2008-06-25 |
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