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Method for protecting aluminum electrolytic pre-baked anode steel grab

A prebaked anode and aluminum electrolysis technology, which is applied in the field of aluminum electrolysis prebaked anode steel claw protection, can solve problems such as erosion, and achieve the effects of reducing smoke, reducing environmental pollution, and advanced technology

Active Publication Date: 2012-07-04
YUNNAN ALUMINUM
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

Although this method is simple and effective, the protective carbon ring itself will be eroded and washed away by the electrolyte during the aluminum electrolysis production process, and will be affected by oxidation and pole changing operations. It is to protect the steel by sacrificing the carbon protective ring. The purpose of the claw is a one-time consumable

Method used

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  • Method for protecting aluminum electrolytic pre-baked anode steel grab
  • Method for protecting aluminum electrolytic pre-baked anode steel grab
  • Method for protecting aluminum electrolytic pre-baked anode steel grab

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0020] The raw material formula weight percent of ceramic coating material is: SnO 2 Sol 80%, Sb 2 o 3 2.0%, CuO 2.0%, ZrO 2 3.0%, Fe 2 o 3 3.0%, ZnO 3.0%, Al 2 o 3 3.0%, TiO 2 1.5%, AgO 1.5%, 1% dispersant.

[0021] Preparation:

[0022] 1. With tin tetrachloride (SnCl 4 ·5H 2 O) is the matrix raw material, with water as the solvent, tin tetrachloride is dissolved in water, and is prepared into 0.3mol L -1 SnO 2 Sol;

[0023] 2. Press Sb 2 o 3 2.0%, CuO 2.0%, ZrO 2 3.0%, Fe 2 o 3 3.0%, ZnO 3.0%, Al 2 o 3 3.0%, TiO 2 1.5%, AgO 1.5% formula ratio, adding various metal water-soluble compounds to SnO 2 Sol, using NaOH or ammonia solution, hydrochloric acid as a pH regulator to adjust the pH of the solution between 7 and 9, adding an appropriate amount of epoxy resin and aluminum sol as a binder to make the solution viscous.

[0024] 3. Add 1% ammonium citrate to the solution obtained in step 2 as a dispersant.

[0025] 4. Coat the sol obtained in ...

Embodiment 2

[0027] The raw material formula weight percent of ceramic coating material is: SnO 2 Sol 90%, Sb 2 o 3 1.0%, CuO 1.0%, ZrO 2 1.5%, Fe 2 o 3 1.5%, ZnO 1.5%, Al 2 o 3 1.0%, TiO 2 0.5%, AgO 0.5%, 1.5% dispersant.

[0028] Preparation:

[0029] 1. With tin tetrachloride (SnCl 4 ·5H 2 O) is the matrix raw material, with water as the solvent, tin tetrachloride is dissolved in water, and is prepared into 0.3mol L -1 SnO 2 Sol;

[0030] 2. Press Sb 2 o 3 1.0%, CuO 1.0%, ZrO 2 1.5%, Fe 2 o 3 1.5%, ZnO 1.5%, Al 2 o 3 1.0%, TiO 2 0.5%, AgO 0.5% formula ratio, adding various metal water-soluble compounds to SnO 2 Sol, using NaOH or ammonia solution, hydrochloric acid as a pH regulator to adjust the pH of the solution between 7.0 and 9.0, adding an appropriate amount of epoxy resin and aluminum sol as a binder to make the solution viscous.

[0031] 3. Add 1.5% polyvinyl alcohol to the solution obtained in step 2 as a dispersant.

[0032] 4. Coat the sol obt...

Embodiment 3

[0034] The raw material formula weight percent of ceramic coating material is: SnO 2 Sol 95%, Sb 2 o 3 0.5%, CuO 0.5%, ZrO 2 0.5%, Fe 2 o 3 0.5%, ZnO 0.3%, Al 2 o 3 0.3%, TiO 2 0.2%, AgO 0.2%, 2% dispersant.

[0035] Preparation:

[0036] 1. With tin tetrachloride (SnCl 4 ·5H 2 O) is the matrix raw material, with water as the solvent, tin tetrachloride is dissolved in water, and is prepared into 0.3mol L -1 SnO 2 Sol;

[0037] 2. Press Sb 2 o 3 0.5%, CuO 0.5%, ZrO 2 0.5%, Fe 2 o 3 0.5%, ZnO 0.3%, Al 2 o 3 0.3%, TiO 2 0.2%, AgO 0.2% formula ratio, adding various metal water-soluble compounds to SnO 2 Sol, use NaOH or ammonia solution, hydrochloric acid as pH regulator, adjust the pH value of the solution between 7.0 and 9.0, add an appropriate amount of epoxy resin and aluminum sol as a binder, and make the solution viscous.

[0038] 3. Add 2.0% polyacrylic acid amine as a dispersant to the solution obtained in step 2.

[0039] 4. Coat the sol obt...

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Abstract

The invention discloses a method for protecting an aluminum electrolytic pre-baked anode steel grab. According to the using environment and conditions of the anode steel grab, by adopting a physical or chemical method or the same to ensure that molecules or ions are aggregated to colloid ions, an anode steel grab ceramic coating material with low cost is developed and the coating material has high adhesion, high temperature resistance and electrolyte erosion resistance. The ceramic coating material comprises the following raw materials in percentage by weight: 80-95% of SnO2, 0.5-5.5% of Sb2O3, 0.5-5.5% of CUO, 0.5-5.5% of ZrO2, 0.5-5.5% of Fe2O3, 0.3-6.5% of ZnO, 0.3-6.5% of Al2O3, 0.2-5.5% of TiO2, 0.2-5.5% of AgO and 1-5% of the dispersant agent. The SnO2 ceramic coating of the invention has better molten salt corrosion resistant property and electric conductivity, which can satisfy the requirements of being the steel grab coating material. The invention reduces a large amount of exhaust gas, decreases the environmental pollution, lessening the amount of CO2 gas by more than 3,600 tons per year, thereby improving and enhancing the production environment of aluminum electrolysis enterprises.

Description

technical field [0001] The invention relates to a method for protecting steel claws of aluminum electrolytic prebaked anodes. Background technique [0002] Carbon anode plays a very important role in the production process of aluminum electrolytic cells. It acts as a conductor to introduce direct current into the electrolytic cell and participates in the anode reaction process. With the continuous consumption in the electrolytic process, carbon consumption is an important part of the electrolytic production process. technical and economic indicators. In the process of electrolytic production, in order to prevent the anode steel claws from being washed and corroded by the electrolyte, protective measures should be taken for the anode steel claws. [0003] At present, the anode steel claw protection method used by aluminum electrolysis enterprises at home and abroad generally adopts the anode protection ring (combined by a pair of fixedly formed semi-circular carbon materials...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): C25C3/12
Inventor 刘志祥杨光德邱哲生严继康周永全边华伟姬凤武和锦黎刘惠军陈晓云
Owner YUNNAN ALUMINUM
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