Nanao metal ceramic inert anode material for aluminium electrolysis and preparation method thereof

A nano-cermet and anode material technology, applied in the field of electrochemical electrolysis, can solve the problems of difficult processing and poor electrical conductivity, and achieve the effects of improved electrical conductivity, improved machinability, high bending strength and fracture toughness

Inactive Publication Date: 2008-09-03
GUIZHOU UNIV
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  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

[0004] The purpose of the present invention is to provide a nano-cermet inert anode material for electrolytic aluminum, to overcome the problems of poor electrical conductivity, difficulty in processing and large-scale existing in the existing cermet inert anode

Method used

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  • Nanao metal ceramic inert anode material for aluminium electrolysis and preparation method thereof
  • Nanao metal ceramic inert anode material for aluminium electrolysis and preparation method thereof
  • Nanao metal ceramic inert anode material for aluminium electrolysis and preparation method thereof

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Embodiment

[0025] (1) 200 mesh copper powder, iron oxide powder, nickel oxide powder according to Cu 14.8% ~ 15.1%, Fe 2 o 3 35% to 36%, NiO 47% to 50% mixed in a ratio, add nickel oxide powder 4% to 14% nano-NiO powder, ultrasonic treatment in alcohol for 30min;

[0026] (2) Add sodium polyacrylate, continue ultrasonic treatment for 30 minutes and adjust the pH value to be greater than 8, and after ball milling the liquid for 5 hours, add HCl and adjust the pH value to be less than 6;

[0027] (3) Stand still for 1 hour, precipitate, filter, and dry at 100-150°C to obtain the mixed base material;

[0028] (4) Add paraffin wax of about 5% of the mass of the mixture to the mixed base material as a plasticizer, and mix evenly, at 1MPa / cm 2 pressed under pressure into a billet;

[0029] (5) The compact is sintered at 1100°C and cooled to room temperature to obtain nano-NiO-Cu-NiFe 2 o 4 Composed of nano-cermet anode materials.

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Abstract

A nanometer cermet inert anode material for aluminum electrolysis and preparation method thereof, the anode material is composed of copper powder, ferric oxide powder and nickel protoxide. Mass fraction of each component is: Cu 14.8% to 15.1%, Fe2O3 35% to 36%, NiO 47% to 50%; adding amount of nanometer NiO is 4% to 14% of NiO mass. The preparation method comprises five steps: (1) mixing the copper powder, ferric oxide powder and nickel protoxide, adding the nanometer NiO powder, processing ultrasonic treatment in alcohol; (2) adding sodium polyacrylate, continuous processing ultrasonic treatment, adding HCl to regulate pH value after milling the liquid; (3) standing, depositing, filtering, drying to obtain mixed base material; (4) adding paraffin in mixed base material as plasticizer, mixing evenly to press as unburnt earthenware; (5) crushing sintering, cooling to obtain the anode material of the invention. The electrical conductivity of the anode material of the invention at 1000 deg.C reaches 100ohm / cm above, and the mechanical property is improved and machining property as well, which enables the cermet anode to machine and industrialize for aluminum electrolysis industry.

Description

technical field [0001] The invention relates to electrochemical electrolysis technology, in particular to an inert anode material composition for electrolytic production of primary aluminum. Background technique [0002] The anode used in the Hall-Elut electrolysis method currently used by the aluminum industry is a carbon anode. During the electrolytic production process, the carbon anode combines with the oxygen precipitated from the electrolytic alumina to produce the greenhouse gas CO 2 And CO, the exhaust gas also contains carcinogenic polycyclic hydrocarbons and fluorocarbons, causing serious environmental pollution. At the same time, due to the combustion of carbon anodes, the size of the anodes is constantly changing, and the anodes need to be replaced and adjusted, making it difficult to stabilize production. As a result, the energy consumption of electrolytic aluminum production is high and the current efficiency is low. In addition, a large amount of carbon ano...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C25C3/12
Inventor 吴贤熙刘卫贾贺峰罗琨琳
Owner GUIZHOU UNIV
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