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System and method for separating carbon and electrolyte in aluminum electrolysis carbon slag

An electrolyte and aluminum electrolysis technology, applied in the field of aluminum electrolysis, can solve the problems of long roasting time, unfavorable large-scale treatment of carbon slag, and low production efficiency

Active Publication Date: 2020-09-11
中铝郑州有色金属研究院有限公司
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

High-temperature roasting will cause secondary environmental protection problems; the roasting time is long, the production efficiency is low, and it is not conducive to large-scale treatment of carbon residue; the labor intensity of the workers is high, and the working environment is harsh

Method used

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  • System and method for separating carbon and electrolyte in aluminum electrolysis carbon slag
  • System and method for separating carbon and electrolyte in aluminum electrolysis carbon slag
  • System and method for separating carbon and electrolyte in aluminum electrolysis carbon slag

Examples

Experimental program
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Effect test

Embodiment 1

[0024] A system for separating carbon and electrolyte from aluminum electrolytic carbon residue, including a carbon residue heating and volatilization system, a high-temperature flue gas channel, and a gaseous electrolyte collection system; the carbon residue heating and volatilization system includes a volatilization chamber 1 and a low-fluorine The charcoal slag bin 2, the grid-shaped carbon electrode 3 is arranged between the volatilization bin 1 and the low-fluorine carbon slag bin 2, the charcoal slag feed port 4 is arranged on the top of the volatilization bin 1, and the upper part of the volatilization bin 1 has a flue gas outlet 5. It communicates with the high-temperature flue gas channel 6; the side of the low-fluorine carbon slag bin 2 has an inert gas inlet 13, and the lower part of the side has a low-fluorine carbon slag discharge port 7; the gaseous electrolyte collection system includes a collection bin 8 arranged from top to bottom and the material bin 9 for alu...

Embodiment 2

[0038]A system for separating carbon and electrolyte in aluminum electrolytic carbon slag, including a carbon slag heating and volatilization system, a high-temperature flue gas channel, and a gaseous electrolyte collection system; the carbon slag heating and volatilization system includes a volatilization chamber 1 and Low-fluorine carbon slag bin 2, a grid-shaped carbon electrode 3 is set between the volatilization bin 1 and the low-fluorine carbon slag bin 2, a carbon slag feed port 4 is provided on the top of the volatilization bin 1, and a flue gas outlet 5 is provided on the upper side of the volatilization bin 1 , which communicates with the high-temperature flue gas channel 6; the side of the low-fluorine carbon slag bin 2 has an inert gas inlet 13, and the lower part of the side has a low-fluorine carbon slag discharge port 7; the gaseous electrolyte collection system includes a collection system arranged from top to bottom The bin 8 and the material bin 9 for aluminum...

Embodiment 3

[0053] A system for separating carbon and electrolyte in aluminum electrolytic carbon slag, including a carbon slag heating and volatilization system, a high-temperature flue gas channel, and a gaseous electrolyte collection system; the carbon slag heating and volatilization system includes a volatilization chamber 1 and Low-fluorine carbon slag bin 2, a grid-shaped carbon electrode 3 is set between the volatilization bin 1 and the low-fluorine carbon slag bin 2, a carbon slag feed port 4 is provided on the top of the volatilization bin 1, and a flue gas outlet 5 is provided on the upper side of the volatilization bin 1 , which communicates with the high-temperature flue gas channel 6; the side of the low-fluorine carbon slag bin 2 has an inert gas inlet 13, and the lower part of the side has a low-fluorine carbon slag discharge port 7; the gaseous electrolyte collection system includes a collection system arranged from top to bottom The bin 8 and the material bin 9 for aluminu...

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Abstract

The invention discloses a system for separating carbon and electrolyte in aluminum electrolysis carbon slag. The system comprises a carbon slag heating volatilization system, a high-temperature flue gas channel and a gaseous electrolyte collecting system; the carbon slag heating volatilization system comprises a volatilization bin and a low-fluorine carbon slag bin which are arranged from top to bottom, a latticed carbon electrode is arranged between the volatilization bin and the low-fluorine carbon slag bin, a carbon slag feeding port is formed in the top of the volatilization bin, and a flue gas outlet is formed in the side upper part of the volatilization bin and communicated with the high-temperature flue gas channel; the side part of the low-fluorine carbon slag bin is provided withan inert gas inlet, and the side lower part is provided with a low-fluorine carbon slag discharge port; the gaseous electrolyte collecting system comprises a collecting bin and an aluminum electrolysis material bin which are arranged from top to bottom, the top of the collecting bin is provided with an aluminum electrolysis material inlet, the side part of the collecting bin is provided with a flue gas inlet, and the other end of the high-temperature flue gas channel is communicated with the flue gas inlet; and an aluminum electrolysis material discharge port is formed in the side lower part of the aluminum electrolysis material bin. The system and method can realize high-efficiency separation of carbon and electrolyte in the aluminum electrolysis carbon slag, is convenient to operate, andcan easily realize continuous and large-scale operation.

Description

technical field [0001] The invention belongs to the technical field of aluminum electrolysis, and relates to a system and method for separating carbon and electrolyte in aluminum electrolysis carbon slag. Background technique [0002] In the process of aluminum electrolysis, due to the influence of uneven combustion of carbon anode, selective oxidation, erosion and erosion of aluminum liquid and electrolyte, some carbon particles fall off from the anode and enter the molten salt electrolyte, forming carbon slag. When scooping up charcoal slag, the electrolyte adheres to the surface of the charcoal slag and is taken away. Usually, the charcoal slag contains about 60% of the electrolyte, resulting in a large waste of electrolyte. Carbon residues are harmful to the environment due to fluorine and other toxic substances, and were included in the "National Hazardous Waste List" in 2016 (code: 321-025-48, hazardous characteristics: T). According to relevant national policies, car...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C01B32/05C25C3/18
CPCC25C3/18C01B32/05
Inventor 李昌林方斌包生重汪艳芳焦庆国王俊青王韬略侯光辉柴登鹏
Owner 中铝郑州有色金属研究院有限公司
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