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Surface scale eliminating method for anode guide rod in aluminium electrolysis

The technology of electrolytic aluminum anode and anode guide rod is applied in the field of descaling on the surface of electrolytic aluminum anode guide rod, which can solve the problems of affecting electric conduction efficiency, affecting factory production efficiency, complex dirt composition, etc. Inexpensive and effective in reducing blood pressure

Inactive Publication Date: 2003-05-14
GUANGXI UNIV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0002] In the process of producing electrolytic aluminum by electrolysis, the surface of the anode guide rod is easy to produce a dirt layer. The composition of this layer of dirt is complex, and its existence greatly affects the electrical conductivity of the electrode, especially the crimping surface between the bus bar and the anode guide rod. On the other hand, if there is a dirt layer, it will directly affect the electrical conduction efficiency, increase the power consumption in the conduction process, and increase the production cost of aluminum
However, since there is currently no good way to remove this layer of dirt at a low cost, many factories do not descale the surface of the anode guide rod, so that the power consumption of aluminum production cannot be reduced, which directly affects the production efficiency of the factory

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0021] Dissolve 20g of sodium hexametaphosphate and 40g of sodium hydroxide in 400ml and 100ml of water respectively. After the dissolution is complete, slowly add the sodium hydroxide aqueous solution to a container with 50g of dodecylbenzene sulfonic acid under stirring, and wait until the reaction is complete. Then add 100g of ethanol, 50g of ethylene glycol monobutyl ether, 50g of triethanolamine, 30g of JFC, and 10g of polyethylene glycol octylphenyl ether (10) to this container, and after stirring evenly, slowly add the mixture in the container to In a container containing an aqueous solution of sodium hexametaphosphate, add 150 ml of water and stir to make 1000 g of the cleaning agent of the present invention.

Embodiment 2

[0023] The steps and methods are the same as in Example 1. Dissolve 50g of sodium hexametaphosphate and 40g of potassium hydroxide in 300ml and 100ml of water respectively, slowly add the potassium hydroxide aqueous solution to a container with 40g of dodecylbenzene sulfonic acid while stirring, and send it to this container after the reaction is complete Add 100g of ethanol, 50g of ethylene glycol monobutyl ether, 50g of triethanolamine, 20g of JFC, 30g of sorbitan fatty acid ester ethylene oxide adduct and stir evenly, and then slowly add this liquid to the container with six under stirring. In the container of sodium metaphosphate aqueous solution, add 220ml of water and stir to make 1000g cleaning agent.

Embodiment 3

[0025] Dissolve 50 g of sodium hexametaphosphate and 30 g of potassium hydroxide in 350 ml and 70 ml of water, respectively. The potassium hydroxide solution was stirred and slowly added to a container containing 30g of dodecylbenzene sulfonic acid. After the reaction was complete, add 80g of ethanol, 180g of ethylene glycol monobutyl ether, 50g of triethanolamine, 50g of JFC, and Tween into this container. -80 10g, stir evenly, slowly add this solution to the sodium hexametaphosphate aqueous solution, and add 100ml of water and stir evenly to obtain 1000g of cleaning agent.

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PUM

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Abstract

The present invention features that the crimping surfaces of the bus bar and anode guide rod are cleaned with the cleaning liquid comprising dodecyl benzene sulfonic acid 1-20 wt%, alkali metal hydroxide 0.5-12 wt%, triethanolamine, 1-25 wt%, JFC 0.1-10 wt%, calgon 0.5-10 wt%, ethanol 5-10 wt%, non-ionic surfactant 1-18 wt% and butylcellusolve 5-10 wt% and water (the balance). Washing the anode guide rod with the cleaning liquid can reduce the electrode voltage obviously, lower the power consumption of electrolyzing aluminium greatly.

Description

Technical field [0001] The invention belongs to the technical field of descaling the surface of an electrolytic aluminum anode guide rod. Background technique [0002] In the process of producing electrolytic aluminum by electrolysis, a dirt layer is prone to occur on the surface of the anode guide rod. This layer of dirt has a complex composition, and its existence greatly affects the electrical conductivity of the electrode, especially on the crimping surface between the bus bar and the anode guide rod. Above, if there is a dirt layer, it will directly affect the efficiency of electrical conduction, increase the power consumption during the conduction process, and increase the production cost of aluminum. However, because there is currently no good way to remove this layer of dirt at a lower cost, many factories have not descaled the surface of the anode guide rod, so the power consumption of aluminum production cannot be reduced, which directly af...

Claims

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Application Information

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IPC IPC(8): C23G1/18C25C3/12
Inventor 韦小玲龚琦李成海梁韬
Owner GUANGXI UNIV
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