Inertial electrode low-temperature aluminium electrolytic cell

A technology of aluminum electrolytic cell and inert electrode, which is applied in the field of aluminum electrolysis, can solve problems such as high energy consumption and environmental pollution, and achieve the effects of low energy consumption, low corrosion and good stability

Inactive Publication Date: 2011-01-05
CENT SOUTH UNIV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

[0003] The purpose of the present invention is to provide a comprehensive use of inert anodes for the disadvantages of polluting the environment and high energy consumption caused by the consumable carbon anodes used in the current aluminum electrolytic cells, the traditional carbon cathodes with poor wettability with aluminum liquid, and the current electrolyte system. , Wettable cathode and low temperature electrolyte inert electrode Low temperature aluminum electrolyzer

Method used

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  • Inertial electrode low-temperature aluminium electrolytic cell
  • Inertial electrode low-temperature aluminium electrolytic cell
  • Inertial electrode low-temperature aluminium electrolytic cell

Examples

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Embodiment 1

[0032] See attached figure 1 , 2 , 3. A low-temperature aluminum electrolytic cell, comprising a cell body 1, a cermet inert anode 2, a wettable cathode 3, and a low-temperature electrolyte 4; the wettable cathode 3 is arranged at the bottom of the cell body 1; the low-temperature The electrolyte 4 is arranged in the cell body 1; the cermet inert anode 2 is arranged on the upper part of the cell body 1, and its end extends into the low-temperature electrolyte 4;

[0033]The cermet inert anode 2 is composed of 2 groups of cermet inert anode groups 9, and each cermet inert anode group 9 is composed of 8 cermet inert anode monomers 17; between the cermet inert anode groups 9 And the cermet inert anode monomers 17 in the same cermet inert anode group 9 are electrically parallel structures;

[0034] The wettable cathode 3 is composed of multi-block size-graded functionally graded TiB 2 / C compound cathode composition;

[0035] The low temperature electrolyte consists of Na 3 A...

Embodiment 2

[0044] The structure of the electrolytic cell of the present embodiment is the same as that of embodiment 1, except that the specific components of the cermet inert anode monomer 17 are: CaO-Ni-NiFe 2 o 4 Cermet inert anode.

[0045] In the actual use of this embodiment, the cell voltage can be controlled at 3.8V-3.9V, the electrolysis temperature is 890-920°C, and the power consumption is less than 13500kWh / t-Al, CF n The emission of compounds is reduced by 70%, which has a great impetus for the development of the environment-friendly aluminum electrolysis industry.

Embodiment 3

[0047] The structure of the electrolytic cell of the present embodiment is the same as that of the embodiment 1, except that the specific components of the cermet inert anode monomer 17 are: CaO-BaO-Ni-NiO-NiFe 2 o 4 Cermet inert anode.

[0048] In the actual use of this embodiment, the cell voltage can be controlled at 3.8V-3.9V, the electrolysis temperature is 890-920°C, and the power consumption is less than 13500kWh / t-Al, CF n The emission of compounds is reduced by 70%, which has a great impetus for the development of the environment-friendly aluminum electrolysis industry.

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Abstract

The invention discloses an inertial electrode low-temperature aluminium electrolytic cell comprising a electrolytic cell body, a metallic ceramic inertial anode, a wettable cathode and a low-temperature electrolyte, wherein, the wettable cathode is arranged at the bottom of the electrolytic cell body; the low-temperature electrolyte is arranged in the electrolytic cell body; the metallic ceramic inertial anode is arranged at the upper part of the electrolytic cell body, and end part of the metallic ceramic inertial anode extends into the low-temperature electrolyte; the metallic ceramic inertial anode is composed of at least two groups of metal ceramic inertial anode sets; each metallic ceramic inertial anode set is composed of at least two metallic ceramic inertial anode monomers; the metallic ceramic inertial anode sets and the metal ceramic inertial anode monomers in the same metal ceramic inertial anode sets are both in electrical parallel connection. The inertial electrode low-temperature aluminium electrolytic cell has reasonable structure, simple and convenient operation, stable operation, less oxygen discharge and small aluminium liquid fluctuation, low electrolytic cell voltage, low operation temperature and less energy consumption, and is suitable for industrial application.

Description

technical field [0001] The invention discloses an aluminum electrolytic cell, in particular to an inert electrode low-temperature aluminum electrolytic cell which comprehensively adopts an inert anode, a wettable cathode and a low-temperature electrolyte; it belongs to the technical field of aluminum electrolysis. Background technique [0002] The traditional Hall-Héroult aluminum electrolysis process has always been the only method for industrial aluminum smelting, but the use of carbon anodes will produce greenhouse gas carbon dioxide and toxic fluoride gases during the electrolysis process, which is not good for the environment. Moreover, the carbon anode is constantly consumed, and new anodes must be replaced frequently, which not only causes fluctuations in the normal operation of the electrolytic cell, but also leads to high labor intensity for workers. In addition, a special carbon production workshop is required for the production of anodes. Ordinary carbon blocks, s...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C25C3/08C25C3/12C25C3/18C25C3/16
Inventor 李劼李旺兴张红亮刘风琴赖延清杨建红张翮辉邱仕麟崔喜风赵清杰吕晓军史志荣徐宇杰田忠良
Owner CENT SOUTH UNIV
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