Device and method of preparing aluminum electrolysis anode anti-oxidation paint from aluminum clinker

Abstract

The invention discloses a device and a method of preparing aluminum electrolysis anode anti-oxidation paint from aluminum clinker. The device is characterized by comprising an aluminum clinker electrolyzer, a titanium-iridium anode, a sealing groove cover, an ammonia-chlorine-fluorine recovery system, a titanium-ruthenium cathode, an aluminum clinker storage-feeding system, an electrolyzer water charging system, an undissolved aluminum-aluminum oxide-silicon oxide-iron oxide precipitate discharge port, and an electrolytic product sodium metaaluminate-potassium metaaluminate solution discharge-distillation and dehydration system. The method employs the waste aluminum clinker as a raw material and recycles aluminum, aluminum oxide, chlorine salt and villiaumite resources to achieve the purpose of reclamation of the waste aluminum clinker polluting an environment.

Description

technical field

[0001] The invention relates to the field of aluminum electrolytic carbon anode protection and comprehensive utilization of waste aluminum ash resources, in particular to a device and method for preparing an anti-oxidation coating for aluminum electrolytic anodes by using aluminum ash slag. Background technique

[0002] Aluminum electrolysis is a molten salt electrolysis process with carbon material as the anode. At present, for each ton of metal aluminum produced, theoretically, 333.3kg of carbon material needs to be consumed, and the actual consumption of carbon material is about 450kg / t of aluminum. Anode threshing, block loss and oxidative combustion during use are the main reasons for the increase in carbon material consumption. Among them, the anodic oxidation combustion loss is due to the carbon block being exposed to the atmosphere, and the high-temperature carbon reacts with oxygen and carbon dioxide in the air to cause carbon consumption. The tempe...

Examples

Embodiment 1

[0061] Analyze the content of aluminum, alumina, aluminum carbide, aluminum nitride, chloride salts, and fluorine salts in aluminum ash slag; add aluminum ash slag from the aluminum ash slag storage-feeding system into the electrolytic cell, and at the same time pass through the electrolytic cell water replenishment system Add sufficient distilled water to the electrolyzer. Hydrolyze and convert aluminum nitride, aluminum carbide, and aluminum fluoride into utilizable aluminum resources. Under the action of direct current, sodium chloride, potassium chloride, sodium fluoride, etc. in the aluminum ash slag undergo an electrolysis reaction, and the reaction products sodium hydroxide and potassium hydroxide are dissolved in the electrolyte, and then ammonia gas-chlorine gas- The fluorine recovery system recovers chlorine, fluorine and ammonia. Sodium hydroxide and potassium hydroxide in the electrolyte can dissolve aluminum and alumina in the precipitate to form sodium metaalumi...

Embodiment 2

[0066]Analyze the content of aluminum, alumina, aluminum carbide, aluminum nitride, chloride salts, and fluorine salts in aluminum ash slag; add aluminum ash slag from the aluminum ash slag storage-feeding system into the electrolytic cell, and at the same time pass through the electrolytic cell water replenishment system Add sufficient distilled water to the electrolyzer. Hydrolyze and convert aluminum nitride, aluminum carbide, and aluminum fluoride into utilizable aluminum resources. Under the action of direct current, sodium chloride, potassium chloride, sodium fluoride, etc. in the aluminum ash slag undergo an electrolysis reaction, and the reaction products sodium hydroxide and potassium hydroxide are dissolved in the electrolyte, and then ammonia gas-chlorine gas- The fluorine recovery system recovers chlorine, fluorine and ammonia. Sodium hydroxide and potassium hydroxide in the electrolyte can dissolve aluminum and alumina in the precipitate to form sodium metaalumin...

technical field

[0001] The invention relates to the field of aluminum electrolytic carbon anode protection and comprehensive utilization of waste aluminum ash resources, in particular to a device and method for preparing an anti-oxidation coating for aluminum electrolytic anodes by using aluminum ash slag. Background technique

[0002] Aluminum electrolysis is a molten salt electrolysis process with carbon material as the anode. At present, for each ton of metal aluminum produced, theoretically, 333.3kg of carbon material needs to be consumed, and the actual consumption of carbon material is about 450kg / t of aluminum. Anode threshing, block loss and oxidative combustion during use are the main reasons for the increase in carbon material consumption. Among them, the anodic oxidation combustion loss is due to the carbon block being exposed to the atmosphere, and the high-temperature carbon reacts with oxygen and carbon dioxide in the air to cause carbon consumption. The tempe...

Examples

Embodiment 1

[0061] Analyze the content of aluminum, alumina, aluminum carbide, aluminum nitride, chloride salts, and fluorine salts in aluminum ash slag; add aluminum ash slag from the aluminum ash slag storage-feeding system into the electrolytic cell, and at the same time pass through the electrolytic cell water replenishment system Add sufficient distilled water to the electrolyzer. Hydrolyze and convert aluminum nitride, aluminum carbide, and aluminum fluoride into utilizable aluminum resources. Under the action of direct current, sodium chloride, potassium chloride, sodium fluoride, etc. in the aluminum ash slag undergo an electrolysis reaction, and the reaction products sodium hydroxide and potassium hydroxide are dissolved in the electrolyte, and then ammonia gas-chlorine gas- The fluorine recovery system recovers chlorine, fluorine and ammonia. Sodium hydroxide and potassium hydroxide in the electrolyte can dissolve aluminum and alumina in the precipitate to form sodium metaalumi...

Embodiment 2

[0066]Analyze the content of aluminum, alumina, aluminum carbide, aluminum nitride, chloride salts, and fluorine salts in aluminum ash slag; add aluminum ash slag from the aluminum ash slag storage-feeding system into the electrolytic cell, and at the same time pass through the electrolytic cell water replenishment system Add sufficient distilled water to the electrolyzer. Hydrolyze and convert aluminum nitride, aluminum carbide, and aluminum fluoride into utilizable aluminum resources. Under the action of direct current, sodium chloride, potassium chloride, sodium fluoride, etc. in the aluminum ash slag undergo an electrolysis reaction, and the reaction products sodium hydroxide and potassium hydroxide are dissolved in the electrolyte, and then ammonia gas-chlorine gas- The fluorine recovery system recovers chlorine, fluorine and ammonia. Sodium hydroxide and potassium hydroxide in the electrolyte can dissolve aluminum and alumina in the precipitate to form sodium metaalumin...

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