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Method for extracting electrolytes from carbon residues in smelting manner

An electrolyte and electrolyte liquid technology, applied in the field of electrolytic aluminum, can solve the problem of undisposable hazardous solid waste of electrolytic aluminum, and achieve the effects of ensuring safety and reliability, reducing investment and avoiding dust generation.

Inactive Publication Date: 2018-01-19
高毅 +2
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

The method of the invention effectively solves the difficult problem that the hazardous solid waste of electrolytic aluminum cannot be disposed of, and the hazardous solid waste can be recycled after being disposed in the factory, so that the enterprise can realize circular economy and environmental protection economy

Method used

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  • Method for extracting electrolytes from carbon residues in smelting manner

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Embodiment 1

[0028]A smelting method to extract the electrolyte in the carbon slag, the specific process is as follows:

[0029] Put the carbon slag into the feeding device through the loader, then add it to the regenerative melting furnace and heat the carbon slag to 1250°C with natural gas in the regenerative melting furnace. After the electrolyte in the carbon slag is smelted into a liquid state, the carbon floats in the electrolyte liquid On the surface, remove the floating carbon and release the electrolyte into the forming mold to cool and demould to obtain an electrolyte block, which is returned to the production of electrolytic aluminum for use. During the smelting process, the carbon undergoes a combustion reaction, in which about 20% of the carbon is burned, and the remaining carbon can be used as the raw material for the electrolytic aluminum anode steel claw protection ring, so as to realize the recycling of hazardous solid waste in the factory and eliminate Generation of secon...

Embodiment 2

[0031] A smelting method to extract the electrolyte in the carbon slag, the specific process is as follows:

[0032] Put the carbon slag into the feeding device through the loader, then add it to the regenerative melting furnace and heat the carbon slag to 1300°C with natural gas in the regenerative melting furnace. After the electrolyte in the carbon slag is smelted into a liquid state, the carbon floats in the electrolyte liquid On the surface, remove the floating carbon and release the electrolyte into the forming mold to cool and demould to obtain an electrolyte block, which is returned to the production of electrolytic aluminum for use. During the smelting process, the carbon undergoes a combustion reaction, in which about 30% of the carbon is burned, and the remaining carbon can be used as the raw material for the electrolytic aluminum anode steel claw protection ring, so as to realize the recycling of hazardous solid waste in the factory and eliminate Generation of seco...

Embodiment 3

[0034] A smelting method to extract the electrolyte in the carbon slag, the specific process is as follows:

[0035] Put the carbon slag into the feeding device through the loader, then add it to the regenerative melting furnace and heat the carbon slag to 1265°C with natural gas in the regenerative melting furnace. After the electrolyte in the carbon slag is smelted into a liquid state, the carbon floats in the electrolyte liquid On the surface, remove the floating carbon and release the electrolyte into the forming mold to cool and demould to obtain an electrolyte block, which is returned to the production of electrolytic aluminum for use. During the smelting process, carbon undergoes a combustion reaction, in which about 23% of the carbon is burned, and the remaining carbon can be used as the raw material for the electrolytic aluminum anode steel claw protection ring, so as to realize the recycling of hazardous solid waste in the factory and eliminate Generation of secondar...

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Abstract

The invention provides a method for extracting electrolytes from carbon residues in a smelting manner. The method comprises the following steps that the carbon residues are heated to 1250-1300 DEG C in a smelting furnace, after the electrolytes in the carbon residues are melted into a liquid, the carbon floats on the surface of the electrolyte liquid, after the floating carbon is removed, the electrolyte liquid is discharged, and after the electrolyte liquid is cooled, the electrolytes are returned to be used for electrolytic aluminum production. By means of the method for extracting the electrolytes from the carbon residues in the smelting manner, the problem that the dangerous solid waste of electrolytic aluminum cannot be disposed is effectively solved, the dangerous solid waste is recycled after being disposed in the factory, and the circular economy and the environmental protection economy of enterprises are realized.

Description

technical field [0001] The invention belongs to the technical field of electrolytic aluminum, and in particular relates to a novel technical method for extracting electrolyte in carbon slag by a smelting method. Background technique [0002] Electrolytic aluminum is aluminum obtained by electrolysis. The modern electrolytic aluminum industry uses cryolite-alumina molten salt electrolysis. The molten cryolite is the solvent, the alumina is the solute, the carbonaceous body is the anode, and the aluminum liquid is the cathode. After a strong direct current is applied, the electrochemical reaction is carried out on the two electrodes in the electrolytic cell at 950°C-970°C. Namely electrolysis. In the process of producing metal aluminum by electrolysis, the carbon anode is continuously oxidized and consumed. Due to the selective oxidation reaction, some carbon particles on the carbon anode skeleton fall off and fall into the electrolytic cell to form carbon slag. [0003] In...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C25C3/06C25C3/18C25C3/22
Inventor 高毅杨鹏鸿李生钦
Owner 高毅
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