EP3533907B1 - Elektrolytische kathodenanordnung und elektrolytische zelle - Google Patents

Elektrolytische kathodenanordnung und elektrolytische zelle Download PDF

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Publication number
EP3533907B1
EP3533907B1 EP17863343.4A EP17863343A EP3533907B1 EP 3533907 B1 EP3533907 B1 EP 3533907B1 EP 17863343 A EP17863343 A EP 17863343A EP 3533907 B1 EP3533907 B1 EP 3533907B1
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EP
European Patent Office
Prior art keywords
electrolytic
insulating clamp
edge
electrolyte
cathode
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.)
Active
Application number
EP17863343.4A
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English (en)
French (fr)
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EP3533907A4 (de
EP3533907A1 (de
Inventor
Aimin Deng
Wenbin Liu
Jialiang Wang
Hao Chen
Jianfei HUANG
Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.)
Jiangxi Nerin Equipment Co Ltd
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Jiangxi Nerin Equipment Co Ltd
Priority date (The priority date 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 date listed.)
Filing date
Publication date
Priority claimed from CN201610970410.8A external-priority patent/CN108004569B/zh
Priority claimed from CN201621194073.XU external-priority patent/CN206244895U/zh
Application filed by Jiangxi Nerin Equipment Co Ltd filed Critical Jiangxi Nerin Equipment Co Ltd
Publication of EP3533907A1 publication Critical patent/EP3533907A1/de
Publication of EP3533907A4 publication Critical patent/EP3533907A4/de
Application granted granted Critical
Publication of EP3533907B1 publication Critical patent/EP3533907B1/de
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    • C—CHEMISTRY; METALLURGY
    • C25—ELECTROLYTIC OR ELECTROPHORETIC PROCESSES; APPARATUS THEREFOR
    • C25C—PROCESSES FOR THE ELECTROLYTIC PRODUCTION, RECOVERY OR REFINING OF METALS; APPARATUS THEREFOR
    • C25C1/00—Electrolytic production, recovery or refining of metals by electrolysis of solutions
    • C25C1/16—Electrolytic production, recovery or refining of metals by electrolysis of solutions of zinc, cadmium or mercury
    • 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
    • C25C7/02—Electrodes; Connections thereof

Definitions

  • the present disclosure relates to the field of chemical industry, and more particularly to an electrolytic cathode assembly and an electrolytic tank.
  • a zinc sheet is formed with its upper edge has an irregular wave-shape, such that a zinc stripping blade is difficult to insert between the zinc sheet and a cathode plate, which is disadvantageous for stripping of the zinc sheet. Therefore, in the field of modem zinc electrolysis, a pre-stripping port is usually disposed on a cathode of the zinc electrolysis.
  • the cathode of the zinc electrolysis in the latest technology is mainly composed of a cathode of the zinc electrolysis, two insulating strips with equal length and a pre-stripping sheet.
  • the insulating strips are hot pressed on two edges of the cathode of the zinc electrolysis.
  • a machined hole for the stripping port is pre-processed in each of front and back sides of the cathode plate at a position of a liquid line, and an insulating pre-stripping sheet is cast in the stripping port, at which no zinc or less amount of the zinc is deposited after electrolysis, and thus a pre-stripping port is formed for feeding a blade to strip the zinc sheet.
  • This structure has the following shortcomings: (1) the pre-stripping sheet and the cathode of the zinc electrolysis are bonded together by bonding force of these two materials, working environment of the electrolysis is about 50 °C, while stripping environment is about 25 °C, under such frequent alternation of heating and cooling, the pre-stripping sheet will loosen or fall off to from gap, and under the corrosion of a strong acid in the tank, the electrolytic zinc will grow in the gap, leading to that the zinc sheet is difficult to be stripped; (2) as the pre-stripping sheet is fixed on the cathode of the zinc electrolysis, the loosening of the pre-stripping sheet will lead the stripping blade to shovel onto the aluminum cathode plate, which is easy to damage the stripping blade; (3) the cathode plate needs to be processed, thereby increasing manufacturing costs of the cathode; (4) replacement of the pre-stripping sheet is complex if the pre-stripping sheet is damaged.
  • US 3 847 779 and US 4 357 225 describe non-conductive means of different geometries for attachment to a cathode plate.
  • an objective of the present disclosure is to provide an electrolytic cathode assembly, which enables a pre-stripping region to be formed on a cathode plate in a simple and reliable manner, without modifying the cathode plate, and is easy to replace.
  • an electrolytic cathode assembly according to claim 1 is provided.
  • the electrolytic cathode assembly includes a cathode plate; first and second edge-covering strips configured to seal first and second side edges of the cathode plate respectively; and an insulating clamp, disposed above the first edge-covering strip and clamping the cathode plate.
  • the insulating clamp is clamped on the cathode plate, such that a clamped region is sealed, and an electrolyte will not enter an inside of the insulating clamp when the electrolysis is carried out in a tank using the electrolytic cathode, thereby preventing an electrolytic metal from completely cladding the cathode.
  • an external force is applied to remove the insulating clamp, and a pre-stripping region is formed at a place where a head of the insulating clamp is located, which is convenient for feeding a stripping blade.
  • the clamped region of the cathode plate is sealed under the long-lasting clamping force of the insulating clamp, thereby effectively preventing the electrolytic metal from completely cladding the cathode.
  • the insulating clamp is separable from the cathode plate and thus is easy to be replaced. Furthermore, there is no need to change the structure of the existing cathode plate and mechanically process the cathode plate, which simplifies production process and saves costs.
  • the insulating clamp is H-shaped, and includes: a clamping part; a controlling part; and a connecting part for connecting the clamping part and the controlling part, in which the clamping part is openable around the controlling part.
  • a height of the insulating clamp is in a range of greater than 5 mm to less than 100 mm.
  • the formed stripping region is of a moderate size.
  • the clamping part is made of an elastic, insulative and anticorrosive material. Therefore, the sealing effect is good, and the service life is long.
  • the first edge-covering strip below the insulating clamp is shorter than the second edge-covering strip in length. Therefore, it is convenient to adjust a position of the insulating clamp in the electrolyte.
  • an electrolytic tank includes: a tank body, defining space for accommodating an electrolyte; an electrolytic anode assembly, disposed in the electrolyte; an electrolytic cathode assembly as described hereinbefore and disposed in the electrolyte; and a power supply, connected to both the electrolytic anode assembly and the electrolytic cathode assembly.
  • the insulating clamp is used in the electrolytic cathode assembly to clamp the cathode plate, such that the clamped region is sealed, and the electrolyte will not enter the inside of the insulating clamp when the electrolysis is carried out in the electrolytic tank using the electrolytic cathode, thereby preventing the electrolytic metal from completely cladding the cathode.
  • an external force is applied to remove the insulating clamp, and a pre-stripping region is formed at a place where a head of the insulating clamp is located, which is convenient for feeding a stripping blade.
  • the clamped region of the cathode plate is sealed under the long-lasting clamping force of the insulating clamp, thereby effectively preventing the electrolytic metal from completely cladding the cathode.
  • the insulating clamp is separable from the cathode plate and thus is easy to be replaced. Furthermore, there is no need to change the structure of the existing cathode plate and to mechanically process the cathode plate, which simplifies production process and saves costs.
  • a bottom end of the first edge-covering strip and a bottom end of the second edge-covering strip both extend to seal at least a part of a bottom edge of the cathode plate, an upper end of the first edge-covering strip below the insulating clamp is beneath a liquid level of the electrolyte, and an upper end of the second edge-covering strip is above the liquid level of the electrolyte.
  • the liquid level of the electrolyte is located at 1/4 to 2/3 of the insulating clamp from a lower end of the insulating clamp.
  • the liquid level of the electrolyte is located at 1/3 to 1/2 of the insulating clamp from the lower end of the insulating clamp.
  • an electrolytic cathode assembly is provided.
  • the electrolytic cathode assembly is explained and illustrated referring to Fig. 1 and according to embodiments of the present disclosure.
  • the electrolytic cathode assembly 100 includes a cathode plate 10, first and second edge-covering strips 20 and an insulating clamp 30.
  • the first and second edge-covering strips 20 cover first and second side edges of the cathode plate 10 respectively to seal the first and second side edges of the cathode plate 10 respectively.
  • Fig. 2 is a partial sectional view in an A-A direction of an electrolytic cathode assembly. Referring to Fig.
  • the insulating clamp 30 is located above the first edge-covering strip 20 on the first side of the cathode plate, and is clamped on the cathode plate 10 to seal the cathode plate 10.
  • an electrolyte will not enter an inside of the insulating clamp, thereby preventing an electrolytic metal from completely cladding the cathode.
  • an external force is applied to remove the insulating clamp, and a pre-stripping region is formed at a place where a head of the insulating clamp is located, which is convenient for feeding a stripping blade to strip the electrolytic metal.
  • the insulating clamp has long-lasting clamping force, which enables the clamped region of the cathode plate to be sealed, thereby effectively preventing the electrolytic metal from completely cladding the cathode. Moreover, the insulating clamp is separable from the cathode plate, and thus is easy to be replaced. Furthermore, there is no need to change the structure of the existing cathode plate and mechanically process the cathode plate, which simplifies production process and saves costs.
  • the insulating clamp 30 is H-shaped, and includes a clamping part 31, a connecting part 32 and a controlling part 33.
  • the connecting part 32 is configured to connect the clamping part 31 and the controlling part 33.
  • the clamping part 31 is openable around the controlling part 32.
  • the controlling part controls an opening size and clamping tightness of the clamping part, thereby ensuring the insulating clamp has effective and long-lasting clamping force, making the clamping part of the insulating clamp have good sealing effect, avoiding the entry of the electrolyte, and preventing the electrolytic metal from completely cladding this clamped region of the cathode plate, so as to form a stripping region at the clamped region, which facilitates the stripping of the electrolytic metal covered on the cathode plate.
  • a size of the insulating clamp is adjustable based on a size of the cathode plate, as long as a size of the stripping region clamped by the insulating clamp benefits the stripping of the electrolytic metal.
  • a height of the insulating clamp 30 is in a range of greater than 5 mm to less than 100 mm.
  • the stripping region formed by using the insulating clamp is of a moderate size, which benefits the stripping of the electrolytic metal. If the insulating clamp is too small, the formed stripping region is too small, and it is difficult to strip the electrolytic metal. If the insulating clamp is too large, the formed stripping region is too large, which not only reduces the electrolytic efficiency, but also influences the setting of other elements of the electrolytic tank.
  • the clamping part 31 is made of an elastic, insulative and anticorrosive material.
  • shape adjustment is easy for an elastic material, it is convenient to clamp the clamping part of the insulating clamp to the cathode plate, and remove the insulating clamp from the cathode plate after electrolysis.
  • the clamping part of the insulating clamp has elasticity, and thus the insulating clamp can be reused, thereby reducing costs of the electrolysis.
  • the insulating clamp has good anticorrosive effect, which reduces or even avoids the corrosion effect of the electrolyte on the insulating clamp, and prolongs service life of the insulating clamp.
  • the insulating clamp 30 may be integrally molded by the elastic, insulative and anticorrosive material. Thereby, the insulating clamp is easy to produce, and is durable and less prone to damage.
  • the first edge-covering strip 20 below the insulating clamp 30 is shorter than the second edge-covering strip 20 in length.
  • a position of the insulating clamp is a feeding position of the blade, if the insulating clamp is located at an edge line of the metal layer, that is, the edge line of the metal layer is located between an upper end and a lower end of the insulating clamp, the blade may be fed obliquely above the metal layer.
  • a liquid level of the electrolyte determines a position of the metal layer.
  • the liquid level of the electrolyte is exactly located between the upper end and the lower end of the insulating clamp, ensuring that the feeding position of the blade is obliquely above the metal layer, thereby making the metal layer easy to be stripped.
  • an electrolytic tank is provided.
  • the electrolytic tank is explained and illustrated with referring to Fig. 4 and according to embodiments of the present disclosure.
  • the electrolytic tank 1000 includes a tank body 200, an electrolytic anode assembly 300, an electrolytic cathode assembly 100 as described above and a power supply 400.
  • the tank body 200 defines space for accommodating an electrolyte.
  • the electrolytic anode assembly 300 and the electrolytic cathode assembly 100 are disposed in the electrolyte.
  • the power supply 400 is connected to both the electrolytic anode assembly 300 and the electrolytic cathode assembly 100.
  • the insulating clamp is used in the electrolytic cathode assembly to clamp the cathode plate, such that the clamped region is sealed, and the electrolyte will not enter the inside of the insulating clamp when the electrolysis is carried out in the tank using the electrolytic cathode assembly, thereby preventing the electrolytic metal from completely cladding the cathode.
  • an external force is applied to remove the insulating clamp, and a pre-stripping region is formed at a place where a head of the insulating clamp is located, which is convenient for feeding the stripping blade.
  • the clamped region of the cathode plate is sealed under the long-lasting clamping force of the insulating clamp, thereby effectively preventing the electrolytic metal from completely cladding the cathode.
  • the insulating clamp is separable from the cathode plate and thus is easy to be replaced. Furthermore, there is no need to change the structure of the existing cathode plate and to mechanically process the cathode plate, which simplifies production process and saves costs.
  • a bottom end of the first edge-covering strip 20 and a bottom end of the second edge-covering strip 20 both extend to seal at least a part of a bottom edge of the cathode plate 10.
  • An upper end of the first edge-covering strip 20 below the insulating clamp 30 is beneath a liquid level of the electrolyte, and an upper end of the second edge-covering strip 20 is above the liquid level of the electrolyte.
  • the position of the insulating clamp is the feeding position of the blade, if the insulating clamp is located at the edge line of the metal layer, that is, the edge line of the metal layer is located between the upper end and the lower end of the insulating clamp, the blade may be fed obliquely above the metal layer. From the mechanical point of view, the fulcrum position at this angle is good, and the lever force is large, as a result, it is easy to strip the metal layer. In the process of electrolysis, the liquid level of the electrolyte determines the position of the metal layer.
  • the liquid level of electrolyte is exactly located between the upper end and the lower end of the insulating clamp, ensuring that the feeding position of the blade is obliquely above the metal layer, thereby making the metal layer easy to be stripped.
  • the liquid level of the electrolyte is located at 1/4 to 2/3 of the insulating clamp from a lower end of the insulating clamp. Due to the fluctuation of the liquid level of the electrolyte, a liquid level line is often inclined, and thereby the edge of the metal layer is inclined.
  • the liquid level of the electrolyte is located at 1/4 to 2/3 of the insulating clamp from the lower end of the insulating clamp, which ensures that a height of the metal layer is lower than the upper end of the insulating clamp.
  • the liquid level of the electrolyte is located at 1/3 to 1/2 of the insulating clamp from the lower end of the insulating clamp.
  • the inventors have found through researches that, when the blade is fed at an angle of 30 to 60 degrees relative to a horizontal, a position of a contact point (i.e., the fulcrum) between the stripping blade and the cathode plate is better, the lever force is larger, and it is easier to strip the metal layer.
  • a longitudinal height of the formed stripping region is suitable, such that a feeding angle of the blade is 30 to 60 degrees relative to the horizontal, thereby making the metal layer easier to be stripped and the stripped metal layer more complete.

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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)

Claims (8)

  1. Eine elektrolytische Kathodenanordnung, umfassend:
    eine Kathodenplatte (10);
    erste und zweite Randabdeckungsstreifen (20), die so ausgestaltet sind, dass sie die erste und zweite Seitenkante der Kathodenplatte (10) abdichten; und
    eine Isolierklemme (30), die oberhalb des ersten Randabdeckungsstreifens (20) angeordnet ist und direkt auf der Kathodenplatte (10) klemmt,
    wobei die Isolierklemme (30) H-förmig ist und umfasst:
    ein Klemmteil (31);
    ein Steuerteil (32); und
    ein Verbindungsteil (33) zum Verbinden des Klemmteils (31) und des Steuerteils (32), wobei das Klemmteil (31) um das Steuerteil (32) herum geöffnet werden kann.
  2. Die elektrolytische Kathodenanordnung nach Anspruch 1, wobei die Höhe der Isolierklemme (30) in einem Bereich von mehr als 5 mm bis weniger als 100 mm liegt.
  3. Die elektrolytische Kathodenanordnung nach Anspruch 1 oder 2, wobei das Klemmteil (31) aus einem elastischen, isolierenden und korrosionsbeständigen Material besteht.
  4. Die elektrolytische Kathodenanordnung nach einem der Ansprüche 1 bis 3, wobei der erste Randabdeckungsstreifen (20) unterhalb der Isolierklemme (30) kürzer ist als der zweite Randabdeckungsstreifen (20) in der Länge.
  5. Ein elektrolytischer Tank, umfassend:
    einen Tankkörper (200), der einen Raum für die Aufnahme eines Elektrolyten definiert;
    eine elektrolytische Anodenanordnung (300), die in dem Elektrolyten angeordnet ist;
    eine elektrolytische Kathodenanordnung (100) nach einem der Ansprüche 1 bis 4, die in dem Elektrolyten angeordnet ist; und
    eine Stromversorgung (400), die sowohl mit der elektrolytischen Anodenanordnung (300) als auch mit der elektrolytischen Kathodenanordnung (100) verbunden ist.
  6. Der elektrolytische Tank nach Anspruch 5, wobei ein unteres Ende des ersten Randabdeckungsstreifens (20) und ein unteres Ende des zweiten Randabdeckungsstreifens (20) sich beide so erstrecken, dass sie zumindest einen Teil eines unteren Randes der Kathodenplatte (10) abdichten, und
    wobei ein oberes Ende des ersten Randabdeckungsstreifens (20) unterhalb der Isolierklemme (30) unterhalb eines Flüssigkeitsspiegels des Elektrolyten liegt und ein oberes Ende des zweiten Randabdeckungsstreifens (20) oberhalb des Flüssigkeitsspiegels des Elektrolyten liegt.
  7. Der elektrolytische Tank nach Anspruch 6, wobei sich der Flüssigkeitsstand des Elektrolyten bei 1/4 bis 2/3 der Isolierklemme (30) von einem unteren Ende der Isolierklemme (30) befindet.
  8. Der elektrolytische Tank nach Anspruch 7, wobei sich der Flüssigkeitsstand des Elektrolyten bei 1/3 bis 1/2 der Isolierklemme (30) vom unteren Ende der Isolierklemme (30) befindet.
EP17863343.4A 2016-10-28 2017-06-23 Elektrolytische kathodenanordnung und elektrolytische zelle Active EP3533907B1 (de)

Applications Claiming Priority (3)

Application Number Priority Date Filing Date Title
CN201610970410.8A CN108004569B (zh) 2016-10-28 2016-10-28 电解阴极组件和电解池
CN201621194073.XU CN206244895U (zh) 2016-10-28 2016-10-28 电解阴极组件和电解池
PCT/CN2017/089772 WO2018076736A1 (zh) 2016-10-28 2017-06-23 电解阴极组件和电解池

Publications (3)

Publication Number Publication Date
EP3533907A1 EP3533907A1 (de) 2019-09-04
EP3533907A4 EP3533907A4 (de) 2020-07-15
EP3533907B1 true EP3533907B1 (de) 2023-12-06

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EP17863343.4A Active EP3533907B1 (de) 2016-10-28 2017-06-23 Elektrolytische kathodenanordnung und elektrolytische zelle

Country Status (4)

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EP (1) EP3533907B1 (de)
JP (1) JP6810799B2 (de)
FI (1) FI3533907T3 (de)
WO (1) WO2018076736A1 (de)

Family Cites Families (11)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US3847779A (en) * 1972-10-26 1974-11-12 Dowa Mining Co Automatic apparatus for stripping deposited metal from a cathode plate in electrowinning process
JPS5929953Y2 (ja) * 1979-09-20 1984-08-27 三井金属鉱業株式会社 電解製錬用陰極母板
JP2006265699A (ja) * 2005-03-25 2006-10-05 Nikko Kinzoku Kk エッジストリップとカソード板の密着方法
CN200949117Y (zh) * 2006-09-26 2007-09-19 云南驰宏锌锗股份有限公司 易剥离电积阴极板
JP5056593B2 (ja) * 2008-06-02 2012-10-24 住友金属鉱山株式会社 エッジストリップの取り外し装置及び取り外し方法。
JP2011162824A (ja) * 2010-02-08 2011-08-25 Sumitomo Metal Mining Co Ltd 電解精製用カソードスペーサー
CN201793781U (zh) * 2010-09-01 2011-04-13 长沙有色冶金设计研究院 防止沉积金属产生不规则剥离端面的阴极板
CN102534689B (zh) * 2012-02-28 2014-07-16 中国恩菲工程技术有限公司 用于金属电积的阴极板
CN202730271U (zh) * 2012-08-01 2013-02-13 昆明理工大学 一种带绝缘边条的有色金属电解阴极板
JP6447087B2 (ja) * 2014-12-16 2019-01-09 三菱マテリアル株式会社 縁部絶縁部材
CN206244895U (zh) * 2016-10-28 2017-06-13 江西瑞林装备有限公司 电解阴极组件和电解池

Also Published As

Publication number Publication date
JP2019535896A (ja) 2019-12-12
WO2018076736A1 (zh) 2018-05-03
EP3533907A4 (de) 2020-07-15
FI3533907T3 (fi) 2024-02-22
EP3533907A1 (de) 2019-09-04
JP6810799B2 (ja) 2021-01-06

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