CN112342574A - Method for recycling waste cell lining electrolyte material of aluminum cell - Google Patents
Method for recycling waste cell lining electrolyte material of aluminum cell Download PDFInfo
- Publication number
- CN112342574A CN112342574A CN202011230829.2A CN202011230829A CN112342574A CN 112342574 A CN112342574 A CN 112342574A CN 202011230829 A CN202011230829 A CN 202011230829A CN 112342574 A CN112342574 A CN 112342574A
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- Prior art keywords
- layer
- heat insulation
- electrolyte
- aluminum electrolysis
- aluminum
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- 229910052782 aluminium Inorganic materials 0.000 title claims abstract description 47
- 239000002699 waste material Substances 0.000 title claims abstract description 26
- 239000002001 electrolyte material Substances 0.000 title claims abstract description 17
- 238000004064 recycling Methods 0.000 title claims abstract description 11
- 238000000034 method Methods 0.000 title claims abstract description 9
- AZDRQVAHHNSJOQ-UHFFFAOYSA-N alumane Chemical compound [AlH3] AZDRQVAHHNSJOQ-UHFFFAOYSA-N 0.000 title claims description 8
- XAGFODPZIPBFFR-UHFFFAOYSA-N aluminium Chemical compound [Al] XAGFODPZIPBFFR-UHFFFAOYSA-N 0.000 claims abstract description 39
- 238000005868 electrolysis reaction Methods 0.000 claims abstract description 33
- 239000000463 material Substances 0.000 claims abstract description 33
- 239000012774 insulation material Substances 0.000 claims abstract description 31
- 239000003792 electrolyte Substances 0.000 claims abstract description 20
- 238000004519 manufacturing process Methods 0.000 claims abstract description 12
- 238000012216 screening Methods 0.000 claims abstract description 4
- 239000011810 insulating material Substances 0.000 claims description 13
- 239000002245 particle Substances 0.000 claims description 3
- 238000004321 preservation Methods 0.000 claims description 2
- 230000007613 environmental effect Effects 0.000 abstract description 4
- 239000000126 substance Substances 0.000 description 4
- VYPSYNLAJGMNEJ-UHFFFAOYSA-N Silicium dioxide Chemical compound O=[Si]=O VYPSYNLAJGMNEJ-UHFFFAOYSA-N 0.000 description 2
- 239000002131 composite material Substances 0.000 description 2
- 239000011819 refractory material Substances 0.000 description 2
- OKTJSMMVPCPJKN-UHFFFAOYSA-N Carbon Chemical compound [C] OKTJSMMVPCPJKN-UHFFFAOYSA-N 0.000 description 1
- YCKRFDGAMUMZLT-UHFFFAOYSA-N Fluorine atom Chemical compound [F] YCKRFDGAMUMZLT-UHFFFAOYSA-N 0.000 description 1
- PNEYBMLMFCGWSK-UHFFFAOYSA-N aluminium oxide Inorganic materials [O-2].[O-2].[O-2].[Al+3].[Al+3] PNEYBMLMFCGWSK-UHFFFAOYSA-N 0.000 description 1
- 230000009286 beneficial effect Effects 0.000 description 1
- 229910052799 carbon Inorganic materials 0.000 description 1
- 239000003575 carbonaceous material Substances 0.000 description 1
- 230000007797 corrosion Effects 0.000 description 1
- 238000005260 corrosion Methods 0.000 description 1
- 230000007547 defect Effects 0.000 description 1
- 238000010586 diagram Methods 0.000 description 1
- 229910052731 fluorine Inorganic materials 0.000 description 1
- 239000011737 fluorine Substances 0.000 description 1
- 238000009413 insulation Methods 0.000 description 1
- 239000007788 liquid Substances 0.000 description 1
- TWNQGVIAIRXVLR-UHFFFAOYSA-N oxo(oxoalumanyloxy)alumane Chemical compound O=[Al]O[Al]=O TWNQGVIAIRXVLR-UHFFFAOYSA-N 0.000 description 1
- 239000002994 raw material Substances 0.000 description 1
- 239000000377 silicon dioxide Substances 0.000 description 1
- 239000002910 solid waste Substances 0.000 description 1
Images
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- C—CHEMISTRY; METALLURGY
- C25—ELECTROLYTIC OR ELECTROPHORETIC PROCESSES; APPARATUS THEREFOR
- C25C—PROCESSES FOR THE ELECTROLYTIC PRODUCTION, RECOVERY OR REFINING OF METALS; APPARATUS THEREFOR
- C25C3/00—Electrolytic production, recovery or refining of metals by electrolysis of melts
- C25C3/06—Electrolytic production, recovery or refining of metals by electrolysis of melts of aluminium
- C25C3/08—Cell construction, e.g. bottoms, walls, cathodes
- C25C3/12—Anodes
Landscapes
- Chemical & Material Sciences (AREA)
- Engineering & Computer Science (AREA)
- Chemical Kinetics & Catalysis (AREA)
- Electrochemistry (AREA)
- Materials Engineering (AREA)
- Metallurgy (AREA)
- Organic Chemistry (AREA)
- Electrolytic Production Of Metals (AREA)
- Processing Of Solid Wastes (AREA)
Abstract
A method for recycling electrolyte materials of a waste cell lining of an aluminum electrolysis production process includes screening the waste cell lining produced in the aluminum electrolysis production process to obtain electrolyte reclaimed materials, separating the replaced anode scrap from heat insulation materials, crushing the separated heat insulation materials into crushed material blocks, using the crushed material blocks as a first layer of bottoming layer, making aggregate heat insulation materials to be added to the surface of an aluminum electrolysis anode, laying the electrolyte reclaimed materials as a second layer of heat insulation materials on the first layer of bottoming layer, laying the crushed material blocks on the surface of the second layer of heat insulation materials as a third layer of heat insulation materials, laying the electrolyte reclaimed materials on the third layer of heat insulation materials as a fourth layer of heat insulation materials, and preparing the aluminum electrolysis cell heat insulation materials meeting the aluminum electrolysis production requirements. The invention can realize the comprehensive utilization of the electrolyte material of the aluminum electrolysis waste cell lining and eliminate the environmental protection problem caused by the electrolyte material of the aluminum electrolysis waste cell lining.
Description
Technical Field
The invention relates to the technical field of dangerous solid waste recycling, in particular to a comprehensive utilization technology of an aluminum electrolysis waste cell lining electrolyte material.
Background
In the aluminum electrolysis production process, the inner lining structure of the aluminum electrolysis cell is deformed and broken due to the permeation and corrosion of high-temperature electrolyte to the inner lining of the aluminum electrolysis cell, high-temperature aluminum liquid and electrolyte infiltrate into the inner lining of the aluminum electrolysis cell from the deformed and broken cracks, so that the aluminum electrolysis cell cannot be normally produced, and waste cell lining is inevitably generated during cell stopping repair.
The waste tank lining mainly comprises waste cathode carbon blocks, waste refractory materials, electrolyte reclaimed materials and the like. At present, the carbon materials and the refractory materials in the waste tank liners can be comprehensively recycled after sorting, crushing and harmless treatment, the main chemical components of the residual electrolyte reclaimed materials comprise valuable substances such as alumina, silica and the like, and meanwhile, fluorine-containing harmful substances are contained, so that the ecological environment is threatened and resources are wasted if the harmful substances are not effectively utilized. Therefore, it is necessary to research and develop a comprehensive utilization technology of the electrolyte material of the aluminum electrolysis waste cell lining to realize comprehensive recycling of the electrolyte material of the aluminum electrolysis waste cell lining.
Disclosure of Invention
In order to solve the defects in the prior art, the invention provides a method for recycling a waste cell lining electrolyte material of an aluminum electrolysis cell, so as to realize comprehensive utilization of the waste cell lining electrolyte material of the aluminum electrolysis and eliminate the environmental protection problem caused by the waste cell lining electrolyte material of the aluminum electrolysis.
The technical scheme adopted by the invention is as follows:
a method for recycling waste cell lining electrolyte material of an aluminum cell comprises the following steps:
A. screening out electrolyte reclaimed materials from a waste tank lining produced in the aluminum electrolysis production process by using a vibrating screen;
B. processing the anode scrap replaced from the aluminum electrolytic cell, separating the heat insulation material from the anode scrap, and crushing the separated heat insulation material into a crushed material block with the particle size of less than or equal to 10 cm;
C. taking the crushed material block obtained in the step B as a first-layer bedding layer, making an aggregate heat-insulating material, and adding the aggregate heat-insulating material onto the surface of the aluminum electrolysis anode, wherein the height of the aggregate heat-insulating material is 3-5 cm;
D. b, paving the electrolyte reclaimed material screened in the step A as a second layer of heat insulation material on the first layer of base coat in the step C, wherein the height of the electrolyte reclaimed material is 1-3 cm;
E. b, paving the crushed material blocks obtained in the step B on the surface of the second layer of heat insulation material obtained in the step D to serve as a third layer of heat insulation material, wherein the height of the third layer of heat insulation material is 3-5 cm;
F. and D, paving the electrolyte reclaimed material in the step A on the third layer of heat insulation material in the step E in a thickness of 1-3cm to serve as a fourth layer of heat insulation material, and preparing the aluminum cell heat insulation composite material meeting the aluminum electrolysis production requirement.
The invention has the following advantages and beneficial effects:
(1) the method of the invention fully utilizes the good fluidity of the electrolyte reclaimed material, can effectively fill the gaps among the broken material blocks in the aluminum electrolysis production process, forms a compact novel composite heat-insulating material under the high-temperature condition, replaces fresh aluminum oxide, and effectively reduces the aluminum electrolysis production cost.
(2) The comprehensive recycling of the electrolyte material of the aluminum electrolysis waste cell lining is realized, the environmental protection problem caused by the electrolyte material of the aluminum electrolysis waste cell lining is eliminated, the closed cycle resource application of all raw materials and products in the original aluminum industry is realized, the environmental protection pressure of enterprises is reduced, and the enterprise cost is reduced.
(3) Solves the technical problem in the electrolytic aluminum industry at home and abroad, realizes the breakthrough of the closed application technology for recycling the electrolyte material of the aluminum electrolysis waste cell lining, and has better popularization and application prospects.
Drawings
FIG. 1 is a schematic structural diagram of an aluminum cell insulating material prepared by the method of the present invention;
fig. 2 is a side view of fig. 1.
Detailed Description
A method for recycling waste cell lining electrolyte material of an aluminum cell comprises the following steps:
A. screening out electrolyte reclaimed materials from a waste tank liner produced in the aluminum electrolysis production by using a vibrating screen;
B. treating the anode scrap replaced from the aluminum electrolytic cell and separating the heat preservation material from the anode scrap; crushing the separated heat-insulating material into a crushed material block with the particle size of less than or equal to 10 cm;
C. taking the crushed material block obtained in the step B as a first-layer base coat layer 2, making an aggregate heat-insulating material, and adding the aggregate heat-insulating material onto the surface of the aluminum electrolysis anode 1, wherein the height of the aggregate heat-insulating material is 3-5 cm;
D. b, paving the electrolyte reclaimed material screened in the step A as a second layer of heat insulation material 3 on the first layer of base coat in the step C, wherein the height of the electrolyte reclaimed material is about 1-3 cm;
E. b, paving the crushed material blocks obtained in the step B on the surface of the second layer of heat insulation material obtained in the step D to serve as a third layer of heat insulation material 4, wherein the height of the third layer of heat insulation material is 3-5 cm;
F. and D, paving the electrolyte reclaimed material in the step A on the third layer of heat insulation material in the step E in a thickness of 1-3cm to serve as a fourth layer of heat insulation material 5, and preparing the aluminum electrolysis cell heat insulation material which has the structure shown in the figures 1 and 2 and meets the aluminum electrolysis production requirement.
Claims (1)
1. A method for recycling waste cell lining electrolyte material of an aluminum cell is characterized by comprising the following steps:
A. screening out electrolyte reclaimed materials from a waste tank lining produced in the aluminum electrolysis production process by using a vibrating screen;
B. treating the anode scrap replaced from the aluminum electrolytic cell, and separating the heat preservation material from the anode scrap; crushing the separated heat-insulating material into a crushed material block with the particle size of less than or equal to 10 cm;
C. taking the crushed material block obtained in the step B as a first-layer bedding layer, making an aggregate heat-insulating material, and adding the aggregate heat-insulating material onto the surface of the aluminum electrolysis anode, wherein the height of the aggregate heat-insulating material is 3-5 cm;
D. b, paving the electrolyte reclaimed material screened in the step A as a second layer of heat insulation material on the first layer of base coat in the step C, wherein the height of the electrolyte reclaimed material is 1-3 cm;
E. b, paving the crushed material blocks obtained in the step B on the surface of the second layer of heat insulation material obtained in the step D to serve as a third layer of heat insulation material, wherein the height of the third layer of heat insulation material is 3-5 cm;
F. and D, paving the electrolyte reclaimed material in the step A on the third layer of heat insulation material in the step E in a thickness of 1-3cm to serve as a fourth layer of heat insulation material, and preparing the aluminum cell heat insulation material meeting the aluminum electrolysis production requirement.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202011230829.2A CN112342574A (en) | 2020-11-06 | 2020-11-06 | Method for recycling waste cell lining electrolyte material of aluminum cell |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202011230829.2A CN112342574A (en) | 2020-11-06 | 2020-11-06 | Method for recycling waste cell lining electrolyte material of aluminum cell |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN112342574A true CN112342574A (en) | 2021-02-09 |
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Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202011230829.2A Pending CN112342574A (en) | 2020-11-06 | 2020-11-06 | Method for recycling waste cell lining electrolyte material of aluminum cell |
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Citations (12)
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|---|---|---|---|---|
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2020
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Application publication date: 20210209 |
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