WO2008098489A1 - Cellule d'électrolyse d'aluminium - Google Patents

Cellule d'électrolyse d'aluminium Download PDF

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Publication number
WO2008098489A1
WO2008098489A1 PCT/CN2008/000336 CN2008000336W WO2008098489A1 WO 2008098489 A1 WO2008098489 A1 WO 2008098489A1 CN 2008000336 W CN2008000336 W CN 2008000336W WO 2008098489 A1 WO2008098489 A1 WO 2008098489A1
Authority
WO
WIPO (PCT)
Prior art keywords
aluminum
electrolytic cell
anode
cell according
aluminum electrolytic
Prior art date
Application number
PCT/CN2008/000336
Other languages
English (en)
Chinese (zh)
Inventor
Xiadong Yang
Yafeng Liu
Zhiyong Zou
Dongfang Zhou
Xindong Yang
Original Assignee
China Aluminum International Engineering Corporation Limited
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 CN200710010402A external-priority patent/CN101054689B/zh
Priority claimed from CN2007100104034A external-priority patent/CN101054690B/zh
Application filed by China Aluminum International Engineering Corporation Limited filed Critical China Aluminum International Engineering Corporation Limited
Publication of WO2008098489A1 publication Critical patent/WO2008098489A1/fr

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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
    • C25C3/00—Electrolytic production, recovery or refining of metals by electrolysis of melts
    • C25C3/06—Electrolytic production, recovery or refining of metals by electrolysis of melts of aluminium
    • C25C3/08—Cell construction, e.g. bottoms, walls, cathodes

Definitions

  • the present invention relates to an aluminum electrolytic cell, and more particularly to an aluminum electrolytic cell having a current intensity of 150 kA or more. Background technique
  • the Hall-Heroult cell currently used in the aluminum industry uses a carbon anode and a carbon block on the surface level as a cathode.
  • the aluminum is produced by electrolytic alumina.
  • the electrolyte is mainly composed of crystallite and alumina melt, and is dissolved therein.
  • the electrically resolved aluminum accumulates in the upper portion of the cathode block of the bottom of the tank to form an aluminum liquid layer and serves as a part of the cathode.
  • the existing Hall-Heroult aluminum electrolysis cell has a common problem in terms of size and electrolysis process.
  • the electric energy efficiency is low, generally between 45 and 50%, and the rest of the electric energy is converted into heat energy and is lost.
  • the pole pitch of the existing aluminum electrolysis cell is generally about 4.5 cm, and the main reason for the low power efficiency is that the existing common prebaked cell has a large pole pitch.
  • the technical problem to be solved by the present invention is to provide an aluminum electrolytic cell which improves the electrical energy efficiency of the aluminum electrolytic cell, reduces the interelectrode pressure drop, and reduces the influence of the magnetic field on the stability of the aluminum electrolytic production.
  • An aluminum electrolytic cell comprising a tank shell, a liner and an upper structure, a cathode carbon block in the inner liner, and an anode carbon block in the upper structure, wherein the inner liner a diversion channel is provided between each set of cathode carbon blocks,
  • An aluminum channel is arranged at an intermediate position of the upper part of the lining, and an aluminum storage tank is arranged on the aluminum side of the end electrolytic cell of the inner liner, and one end of the aluminum sulcus is connected with the aluminum storage tank, and a cutting point is arranged between the anode carbon blocks.
  • the present invention removes the aluminum channel of the periphery of the lining of the aluminum electrolytic cell (that is, in the present invention, the aluminum sulcus is only disposed at the middle of the upper portion of the lining), and the aluminum storage tank is only disposed at At one end (not the periphery) of the aluminum electrolytic cell, the aluminum liquid in the aluminum storage tank has substantially no current passing, avoiding the fluctuation of the aluminum liquid in the aluminum storage tank by the electromagnetic force, and also avoiding the aluminum channel at the periphery. The influence of the side of the cell. This novel design helps to reduce the electrode pitch and improve the power utilization.
  • the longitudinal center line of the electrolytic cell is designed to be stepped, and the number of steps is 2-5.
  • the gap between the anode carbon blocks at the blanking point is 180 ⁇ 250 mm.
  • the adjacent cathode carbon blocks are pasted into a diversion trench of 2 to 10% slope.
  • the upper surface of the anode carbon block is a 18 2 composite layer, and the composite layer has a thickness of 10 to 50 mm.
  • the blanking point is 2-8, and the blanking point is set away from the longitudinal center line of the electrolytic cell.
  • a non-conductive anode 10 is suspended from the upper portion of the aluminum storage tank.
  • the lower surface of the non-conductive anode 10 is higher than the liquid level of the electrolyte in the aluminum storage tank 4.
  • the upper surface of the non-conductive anode 10 is covered with a layer of insulating material.
  • the non-conductive anode 10 is a carbon anode that is not electrically conductive.
  • the aluminum liquid is not stored between the anode carbon block and the cathode carbon block of the aluminum electrolytic cell of the structure of the invention, so that the pole distance is reduced from about 4.5 cm to 2.5 ⁇ 3 cm from the conventional electrolytic cell, and the cathode carbon block is paste-formed into a certain
  • the inclination is convenient for the aluminum produced by electrolysis to be merged into the intermediate groove in time.
  • the longitudinal center line of the electrolytic cell is designed as a stepped groove to facilitate the flow of aluminum into the aluminum storage tank on one side of the electrolytic cell, and the aluminum storage tank is used for storing the electrolytically generated Aluminum, the electrolytic cell adopts multi-point blanking, the feeding point is away from the longitudinal center line of the electrolytic cell, the non-conductive anode is suspended on the upper part of the aluminum storage tank, and the upper surface of the non-conductive anode is covered with the insulating material layer, thereby solving the upper heat preservation of the aluminum storage tank, It also ensures the integrity of the upper crust and prevents the cover material from falling into the aluminum storage tank.
  • the invention reduces the pole pitch by adopting the above structure, improves the electric energy utilization rate, and realizes the electrolysis production of the aluminum electrolysis tank without the aluminum liquid, thereby greatly reducing the influence of the magnetic field on the production stability of the aluminum electrolysis.
  • FIG. 1 is a front view showing the structure of an aluminum electrolytic cell of the present invention.
  • FIG. 2 is a schematic side view showing the structure of an aluminum electrolytic cell of the present invention.
  • Figure 3 is a schematic view showing the structure of the material point.
  • anode carbon block 1, cathode carbon block, 3, aluminum channel, 4, aluminum storage tank,
  • the current intensity is between 150 kA and 200 kA.
  • the structure of the aluminum electrolytic cell is as follows: It is composed of a tank shell 7, an inner liner 8 and an upper structure 9, each of which has two cathode carbon blocks. A guiding groove 6 is arranged, and an aluminum channel 3 is arranged at an upper portion of the inner portion of the inner liner 8.
  • the aluminum storage side of the end electrolytic cell of the inner liner 8 is provided with an aluminum storage tank 4, and one end of the aluminum channel 3 and the aluminum storage tank 4 connection.
  • the inner lining 8 is provided with 20 sets of cathode carbon blocks, and the upper structure 7 is provided with 18 sets of anode carbon blocks.
  • the number of anode carbon blocks 1 and cathode carbon blocks 2 can be reasonably determined according to factors such as current intensity, etc. Therefore, it is described in detail.
  • a blanking point 5 is provided between adjacent anode carbon blocks 1.
  • the number of the blanking points 5 can be reasonably determined according to the change in the capacity of the electrolytic cell, and is generally 2 to 8, preferably 4.
  • the position of the blanking point 5 is specifically set away from the longitudinal centerline of the electrolytic cell, and the gap of the anode carbon block 1 at the blanking point 5 is specifically set to 180 to 250 mm. This arrangement of the blanking point 5 prevents the blanking material (e.g., alumina) from being deposited directly into the aluminum channel 3 to cause clogging.
  • the blanking material e.g., alumina
  • the adjacent cathode carbon block 2 of the inner liner is paste-bonded into a diversion channel 6 of 2-10% inclination, which facilitates the flow of aluminum into the aluminum channel 3 (it can be seen that the slope direction of the diversion channel 6 is from the electrolytic cell Both sides are inclined to the central aluminum channel 3).
  • the longitudinal center line of the electrolytic cell is designed as a step type, and the number of steps varies according to the capacity of the electrolytic cell, and is generally 2 to 5, which facilitates the collection of the aluminum liquid to the end aluminum storage tank 4.
  • the capacity of the aluminum storage tank 4 can satisfy the aluminum production amount of the electrolytic cell for half a day.
  • the upper surface of the anode carbon block 2 is a TiB 2 composite layer, and the composite layer has a thickness of 10 to 50 mm. Since the aluminum liquid produced by the electrolysis is timely sent to the aluminum storage tank 4, the aluminum-free liquid between the electrodes is realized. Production, thus eliminating the influence of the magnetic field on the stability of electrolytic production, the pole pitch can be produced at 2.5 ⁇ 3 cm, improving the electrical energy efficiency.
  • the non-conductive anode 10 is suspended on the upper portion of the end aluminum storage tank 4.
  • the lower surface of the non-conductive anode 10 is higher than the liquid surface of the electrolyte in the aluminum storage tank 4.
  • the upper surface of the non-conductive anode 10 is covered with the insulating layer, and the insulating layer is It achieves the purpose of heat preservation and plays a role in preventing anodization.
  • the non-conductive anode 10 is a carbon anode that is not electrically conductive itself.
  • This application uses a carbon anode as a heat insulating member, and the carbon anode itself is not electrically conductive, so that the carbon anode does not participate in the electrolysis reaction and therefore is not consumed.
  • the carbon anode has good corrosion resistance to the molten liquid electrolyte in the electrolytic cell, and it is difficult to achieve common materials. Therefore, the non-conductive anode 10 of the present application has good corrosion resistance and thermal insulation, which is completely different from the prior art in which some anodes conduct electricity and participate in electrolytic reactions.

Landscapes

  • 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

La présente invention concerne une cellule d'électrolyse d'aluminium, et plus particulièrement fonctionnant à au moins 150 kA. Cette cellule est constituée d'une coque, d'une garniture, et d'une structure supérieure. Des blocs cathodiques en carbone sont disposés à l'intérieur de la garniture, et des blocs anodiques de carbone à l'intérieur de la structure supérieure. La cellule comporte une rainure drainée entre les blocs cathodiques de carbone à l'intérieur de la garniture, un fossé collecteur d'aluminium en position médiane au-dessus de la garniture, et un réservoir collecteur d'aluminium à un orifice de la cellule où le produit est prélevé. Une extrémité du fossé collecteur d'aluminium est reliée à la cuve de collecte d'aluminium, des points d'alimentation en matériau étant disposés entre les anodes. La présente invention permet une réduction de la distance entre anode et cathode et une amélioration du taux d'utilisation de l'énergie électrique. L'invention permet également de ne pas avoir d'aluminium liquide entre anode et cathode pendant le processus de production d'aluminium par électrolyse, ce qui permet de réduire grandement l'effet du champ magnétique sur la stabilité dudit processus.
PCT/CN2008/000336 2007-02-13 2008-02-13 Cellule d'électrolyse d'aluminium WO2008098489A1 (fr)

Applications Claiming Priority (4)

Application Number Priority Date Filing Date Title
CN200710010402.X 2007-02-13
CN200710010402A CN101054689B (zh) 2007-02-13 2007-02-13 铝电解槽的端部保温结构
CN2007100104034A CN101054690B (zh) 2007-02-13 2007-02-13 一种铝电解槽
CN200710010403.4 2007-02-13

Publications (1)

Publication Number Publication Date
WO2008098489A1 true WO2008098489A1 (fr) 2008-08-21

Family

ID=39689657

Family Applications (1)

Application Number Title Priority Date Filing Date
PCT/CN2008/000336 WO2008098489A1 (fr) 2007-02-13 2008-02-13 Cellule d'électrolyse d'aluminium

Country Status (2)

Country Link
SA (1) SA08290057B1 (fr)
WO (1) WO2008098489A1 (fr)

Cited By (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN107893240A (zh) * 2017-12-04 2018-04-10 北京西玛高科技术有限公司 一种预焙阳极铝电解槽
CN113502508A (zh) * 2021-08-10 2021-10-15 内蒙古霍煤鸿骏铝电有限责任公司 一种铝电解槽高效生产的控制方法
CN114921816A (zh) * 2022-04-29 2022-08-19 河南和成无机新材料股份有限公司 铝电解槽节能降耗的方法
CN115074777A (zh) * 2022-06-27 2022-09-20 中南大学 一种可柔性运行的大型双层密闭惰性阳极铝电解槽

Citations (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US20030010628A1 (en) * 1999-10-26 2003-01-16 Vittorio De Nora Low temperature operating cell for the electrowinning of aluminium
US6692620B2 (en) * 2002-04-27 2004-02-17 Moltech Invent S.A. Aluminium electrowinning cell with sidewalls resistant to molten electrolyte
CN1718866A (zh) * 2004-07-06 2006-01-11 中南大学 一种导流式硼化钛涂层阴极铝电解槽
CN101054690A (zh) * 2007-02-13 2007-10-17 沈阳铝镁设计研究院 一种铝电解槽

Patent Citations (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US20030010628A1 (en) * 1999-10-26 2003-01-16 Vittorio De Nora Low temperature operating cell for the electrowinning of aluminium
US6692620B2 (en) * 2002-04-27 2004-02-17 Moltech Invent S.A. Aluminium electrowinning cell with sidewalls resistant to molten electrolyte
CN1718866A (zh) * 2004-07-06 2006-01-11 中南大学 一种导流式硼化钛涂层阴极铝电解槽
CN101054690A (zh) * 2007-02-13 2007-10-17 沈阳铝镁设计研究院 一种铝电解槽

Cited By (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN107893240A (zh) * 2017-12-04 2018-04-10 北京西玛高科技术有限公司 一种预焙阳极铝电解槽
CN113502508A (zh) * 2021-08-10 2021-10-15 内蒙古霍煤鸿骏铝电有限责任公司 一种铝电解槽高效生产的控制方法
CN114921816A (zh) * 2022-04-29 2022-08-19 河南和成无机新材料股份有限公司 铝电解槽节能降耗的方法
CN115074777A (zh) * 2022-06-27 2022-09-20 中南大学 一种可柔性运行的大型双层密闭惰性阳极铝电解槽
CN115074777B (zh) * 2022-06-27 2024-01-30 中南大学 一种可柔性运行的大型双层密闭惰性阳极铝电解槽

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Publication number Publication date
SA08290057B1 (ar) 2012-10-01

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