CN111041526A - 500KA electrolytic tank anode heat preservation covering material and preparation method thereof - Google Patents
500KA electrolytic tank anode heat preservation covering material and preparation method thereof Download PDFInfo
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- CN111041526A CN111041526A CN201911364378.9A CN201911364378A CN111041526A CN 111041526 A CN111041526 A CN 111041526A CN 201911364378 A CN201911364378 A CN 201911364378A CN 111041526 A CN111041526 A CN 111041526A
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- electrolyte
- covering material
- block
- electrolytic cell
- lump
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- 239000000463 material Substances 0.000 title claims abstract description 70
- 238000004321 preservation Methods 0.000 title claims abstract description 22
- 238000002360 preparation method Methods 0.000 title abstract description 9
- 239000003792 electrolyte Substances 0.000 claims abstract description 49
- 238000000034 method Methods 0.000 claims abstract description 21
- PNEYBMLMFCGWSK-UHFFFAOYSA-N aluminium oxide Inorganic materials [O-2].[O-2].[O-2].[Al+3].[Al+3] PNEYBMLMFCGWSK-UHFFFAOYSA-N 0.000 claims abstract description 14
- 239000000843 powder Substances 0.000 claims abstract description 14
- 238000005868 electrolysis reaction Methods 0.000 claims description 16
- 229910052782 aluminium Inorganic materials 0.000 claims description 9
- 238000009413 insulation Methods 0.000 claims description 9
- 239000000203 mixture Substances 0.000 claims description 9
- XAGFODPZIPBFFR-UHFFFAOYSA-N aluminium Chemical compound [Al] XAGFODPZIPBFFR-UHFFFAOYSA-N 0.000 claims description 8
- TWNQGVIAIRXVLR-UHFFFAOYSA-N oxo(oxoalumanyloxy)alumane Chemical compound O=[Al]O[Al]=O TWNQGVIAIRXVLR-UHFFFAOYSA-N 0.000 claims description 4
- 239000002245 particle Substances 0.000 claims description 4
- 238000005086 pumping Methods 0.000 claims description 4
- 230000008859 change Effects 0.000 claims description 3
- 238000003860 storage Methods 0.000 claims description 3
- 238000006243 chemical reaction Methods 0.000 claims description 2
- 239000002131 composite material Substances 0.000 claims 1
- 230000000694 effects Effects 0.000 abstract description 10
- 238000004519 manufacturing process Methods 0.000 abstract description 7
- 238000007493 shaping process Methods 0.000 abstract description 6
- UGFAIRIUMAVXCW-UHFFFAOYSA-N Carbon monoxide Chemical compound [O+]#[C-] UGFAIRIUMAVXCW-UHFFFAOYSA-N 0.000 abstract description 5
- 239000003546 flue gas Substances 0.000 abstract description 5
- 239000007789 gas Substances 0.000 abstract description 5
- 238000010304 firing Methods 0.000 abstract description 2
- OKTJSMMVPCPJKN-UHFFFAOYSA-N Carbon Chemical compound [C] OKTJSMMVPCPJKN-UHFFFAOYSA-N 0.000 description 9
- 229910052799 carbon Inorganic materials 0.000 description 9
- 230000006872 improvement Effects 0.000 description 5
- 230000009286 beneficial effect Effects 0.000 description 2
- 230000003647 oxidation Effects 0.000 description 2
- 238000007254 oxidation reaction Methods 0.000 description 2
- AZDRQVAHHNSJOQ-UHFFFAOYSA-N alumane Chemical compound [AlH3] AZDRQVAHHNSJOQ-UHFFFAOYSA-N 0.000 description 1
- 230000008602 contraction Effects 0.000 description 1
- 230000007547 defect Effects 0.000 description 1
- 230000004048 modification Effects 0.000 description 1
- 238000012986 modification Methods 0.000 description 1
- 230000008569 process Effects 0.000 description 1
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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
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- 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)
Abstract
The invention discloses a 500KA electrolytic tank anode heat preservation covering material and a preparation method thereof, wherein the covering material consists of an electrolyte block and alumina powder, wherein the material proportion components are that the alumina powder accounts for 70%, and the electrolyte block accounts for 30%. Compared with the existing heat-preservation covering material, the heat-preservation covering material prepared by the method is uniformly stirred, so that the heat-preservation effect of the electrolytic cell is ensured; the granularity of the electrolyte block is controlled within 10mm, the edge-closing furnace surface shaping can be better carried out, and the poor gas collection effect of the electrolytic flue gas caused by shell collapse and fire firing is reduced; the labor intensity of workers on site is reduced, the production efficiency is improved, and the method has good popularization and application values.
Description
Technical Field
The invention relates to the technical field of materials for aluminum electrolysis production, in particular to a 500KA electrolytic cell anode heat-preservation covering material and a preparation method thereof.
Background
In the production process of the prebaked aluminum cell, the replacement of the anode carbon block is an indispensable operation, and after the replacement of a new anode carbon block, an anode heat-preservation covering material formed by mixing alumina with a certain thickness and a crushed material of an electrolyte block on the shell surface of an electrolytic anode needs to be covered on the upper surface of the anode so as to preserve the heat of the anode carbon block, avoid the oxidation of the anode carbon block and improve the conductivity of the anode carbon block. The current heat-preservation covering material has no uniform proportioning standard, the granularity of electrolyte blocks is greatly different, the edge contraction of an electrolytic cell and the shaping difficulty of a furnace surface are high, the furnace surface is easy to collapse and fire, and the gas collection effect of electrolytic flue gas is influenced; the existing method for adding the heat preservation covering material to the new anode carbon block mainly adopts two methods: one method is that firstly a special charging hopper is used to add the crushed electrolyte block material to the anode carbon block, and simultaneously the aluminum oxide which is beaten to an electrolysis high-position bin through a dilute phase is added to an aluminum electrolysis multifunctional crown block, and then the electrolyte block material is added through an aluminum electrolysis multifunctional charging system; the other method is that a bucket elevator or a screw conveyor is used for respectively pumping the alumina and the crushed electrolyte blocks into an electrolysis high-level bin, then an aluminum electrolysis multifunctional crown block is added, and the mixed covering material is added onto the anode carbon block by the aluminum electrolysis multifunctional crown block. In both methods, the covering materials are not uniformly mixed, so that the electrolytic cell has poor heat insulation effect and large local temperature difference. Meanwhile, the first method needs manual cooperation, and the material is thrown greatly in the process, so that the field production environment is seriously influenced, and the manual labor intensity is increased.
Disclosure of Invention
In order to solve the defects of the prior art, the anode heat-preservation covering material for the 500KA electrolytic cell and the preparation method thereof are provided, and the problems that the furnace surface shaping difficulty is large due to large particle size difference of the existing electrolyte blocks, the furnace surface is easy to collapse and fire, and the gas collection effect of electrolytic flue gas is influenced are solved; the covering materials are not uniformly mixed, so that the electrolytic cell has poor heat insulation effect and large local temperature difference, the problem of field material throwing is solved, the labor intensity of workers is reduced, and the production efficiency is improved.
The anode heat-preservation covering material for the 500KA electrolytic tank and the preparation method thereof are provided for realizing the purpose of the invention, and the anode heat-preservation covering material consists of an electrolyte block and alumina powder, wherein the material proportion components comprise 70% of the alumina powder and 30% of the electrolyte block. Is beneficial to the heat preservation of the electrolytic cell and avoids the oxidation of the anode carbon block.
As a further improvement of the scheme, the electrolyte block comprises the following components in percentage by weight: the granularity is 1-5 mm accounting for 30 percent, and the granularity is 5-10 mm accounting for 70 percent. The edge closing and the furnace surface shaping of the electrolytic cell are facilitated, and the furnace surface shell collapse and fire hazard are reduced.
As a further improvement of the scheme, the method comprises the following steps:
the method comprises the following steps: replacing an electrolyte block of the electrolytic cell after the anode scrap is cleaned, conveying the electrolyte block to a jaw crusher through a belt, forming a primary block material after primary crushing, conveying the primary block material to a reaction crusher through a large-inclination-angle belt conveyor, and forming a secondary block material after secondary crushing;
step two: adding the crushed electrolyte lump materials into an electrolyte mixer truck through a storage bin, adding the crushed electrolyte lump materials according to 30% of the volume of a tank body of the electrolyte mixer truck, pumping the alumina powder in a fresh purified bin into the electrolyte mixer truck through a feeding pipe, and filling the residual 70% of the volume of the tank body of the electrolyte mixer truck;
step three: after the mixture is stirred by the electrolyte mixing truck, the mixture of the electrolyte lump materials and the alumina powder is beaten to a charging hole of the bucket elevator, and then the mixture is beaten to an electrolysis high-level bin by the bucket elevator and is used for electrolysis pole change by adding to the aluminum electrolysis multifunctional crown block.
As a further improvement of the scheme, the size of the primary lump material formed by primary crushing in the step one through a jaw crusher is 20-50 mm.
As a further improvement of the scheme, the size of the secondary lump material formed after the secondary crushing of the impact crusher in the step one is 1-10 mm.
As a further improvement of the scheme, the ratio of the grain size components of the secondary lump materials formed after the secondary crushing in the first step can be realized by adjusting the gap and the position of the impact frame of the impact crusher.
The invention has the beneficial effects that:
compared with the prior art, the anode heat-preservation covering material for the 500KA electrolytic cell and the preparation method thereof provided by the invention have the advantages that compared with the existing heat-preservation covering material, the heat-preservation covering material prepared by the method is uniformly stirred, so that the heat-preservation effect of the electrolytic cell is ensured; the granularity of the electrolyte block is controlled within 10mm, the edge-closing furnace surface shaping can be better carried out, and the poor gas collection effect of the electrolytic flue gas caused by shell collapse and fire firing is reduced; the labor intensity of workers on site is reduced, the production efficiency is improved, and the method has good popularization and application values.
Drawings
The following detailed description of embodiments of the invention is provided in conjunction with the appended drawings, in which:
FIG. 1 is a flow chart of the operation of the thermal insulation covering material of the present invention.
Detailed Description
As shown in figure 1, the anode heat-preservation covering material for the 500KA electrolytic cell and the preparation method thereof provided by the invention are used for solving the problems that the furnace surface shaping difficulty is large due to large particle size difference of the existing electrolyte blocks, the furnace surface is easy to collapse and fire, and the gas collection effect of electrolytic flue gas is influenced; the covering materials are not uniformly mixed, so that the electrolytic cell has poor heat insulation effect and large local temperature difference, the problem of field material throwing is solved, the labor intensity of workers is reduced, and the production efficiency is improved.
The anode heat-preservation covering material for the 500KA electrolytic tank and the preparation method thereof are provided for realizing the purpose of the invention, and the anode heat-preservation covering material consists of an electrolyte block and alumina powder, wherein the material proportion components comprise 70% of the alumina powder and 30% of the electrolyte block. Wherein, the granularity components of the electrolyte block material are as follows: the granularity is 1-5 mm accounting for 30 percent, and the granularity is 5-10 mm accounting for 70 percent.
The method specifically comprises the following steps:
the method comprises the following steps: and (3) replacing the electrolytic cell with the electrolyte block cleaned of the anode scrap, conveying the electrolytic cell to a jaw crusher through a belt, and forming a primary lump material after primary crushing, wherein the size of the primary lump material is 20-50mm, conveying the primary lump material to a counterattack crusher through a large-inclination-angle belt conveyor, and forming a secondary lump material after secondary crushing, wherein the size of the secondary lump material is 1-10 mm. The proportion of the second-stage lump material granularity components can be realized by adjusting the gap and the position of a counterattack frame of the counterattack crusher.
Step two: adding the crushed electrolyte lump materials into an electrolyte mixer truck through a storage bin, adding the crushed electrolyte lump materials according to 30% of the volume of a tank body of the electrolyte mixer truck, pumping the alumina powder in a fresh purified bin into the electrolyte mixer truck through a feeding pipe, and filling the residual 70% of the volume of the tank body of the electrolyte mixer truck;
step three: after the mixture is stirred by the electrolyte mixing truck, the mixture of the electrolyte lump materials and the alumina powder is beaten to a charging hole of the bucket elevator, and then the mixture is beaten to an electrolysis high-level bin by the bucket elevator and is used for electrolysis pole change by adding to the aluminum electrolysis multifunctional crown block.
The above embodiments are not limited to the technical solutions of the embodiments themselves, and the embodiments may be combined with each other into a new embodiment. The above embodiments are only for illustrating the technical solutions of the present invention and are not limited thereto, and any modification or equivalent replacement without departing from the spirit and scope of the present invention should be covered within the technical solutions of the present invention.
Claims (6)
1. The utility model provides a 500KA electrolytic bath anode heat preservation covering material which characterized in that: the aluminum oxide composite material consists of an electrolyte block and aluminum oxide powder, wherein the material proportion components are that the aluminum oxide powder accounts for 70%, and the electrolyte block accounts for 30%.
2. The anode thermal insulation covering material for the 500KA electrolytic cell as claimed in claim 1, wherein: the electrolyte block material comprises the following components in percentage by weight: the granularity is 1-5 mm accounting for 30 percent, and the granularity is 5-10 mm accounting for 70 percent.
3. The method for preparing anode thermal insulation covering material for 500KA electrolytic cell according to claim 1 or 2, wherein: the method comprises the following steps:
the method comprises the following steps: replacing an electrolyte block of the electrolytic cell after the anode scrap is cleaned, conveying the electrolyte block to a jaw crusher through a belt, forming a primary block material after primary crushing, conveying the primary block material to a reaction crusher through a large-inclination-angle belt conveyor, and forming a secondary block material after secondary crushing;
step two: adding the crushed electrolyte lump materials into an electrolyte mixer truck through a storage bin, adding the crushed electrolyte lump materials according to 30% of the volume of a tank body of the electrolyte mixer truck, pumping the alumina powder in a fresh purified bin into the electrolyte mixer truck through a feeding pipe, and filling the residual 70% of the volume of the tank body of the electrolyte mixer truck;
step three: after the mixture is stirred by the electrolyte mixing truck, the mixture of the electrolyte lump materials and the alumina powder is beaten to a charging hole of the bucket elevator, and then the mixture is beaten to an electrolysis high-level bin by the bucket elevator and is used for electrolysis pole change by adding to the aluminum electrolysis multifunctional crown block.
4. The method for preparing anode thermal insulation covering material for 500KA electrolytic cell according to claim 3, wherein: and in the first step, the particle size of the primary lump material formed by primary crushing through the jaw crusher is 20-50 mm.
5. The method for preparing anode thermal insulation covering material for 500KA electrolytic cell according to claim 3, wherein: and in the step I, the particle size of the secondary lump material formed after the secondary crushing of the impact crusher is 1-10 mm.
6. The method for preparing anode thermal insulation covering material for 500KA electrolytic cell according to claim 3 or 5, wherein: the granularity component proportion of the secondary lump materials formed after the secondary crushing in the step one can be realized by adjusting the gap and the position of the impact frame of the impact crusher.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201911364378.9A CN111041526A (en) | 2019-12-26 | 2019-12-26 | 500KA electrolytic tank anode heat preservation covering material and preparation method thereof |
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201911364378.9A CN111041526A (en) | 2019-12-26 | 2019-12-26 | 500KA electrolytic tank anode heat preservation covering material and preparation method thereof |
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| CN111041526A true CN111041526A (en) | 2020-04-21 |
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| CN201911364378.9A Pending CN111041526A (en) | 2019-12-26 | 2019-12-26 | 500KA electrolytic tank anode heat preservation covering material and preparation method thereof |
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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN112342574A (en) * | 2020-11-06 | 2021-02-09 | 云南云铝润鑫铝业有限公司 | Method for recycling waste cell lining electrolyte material of aluminum cell |
Citations (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US4490233A (en) * | 1982-05-18 | 1984-12-25 | Aluminium De Grece | Process for thermally insulating precalcined anodes in electrolysis cells for the production of aluminum |
| CN101748435A (en) * | 2008-12-05 | 2010-06-23 | 贵阳铝镁设计研究院 | Method and system for cleaning and reclaiming electrolyte |
| CN108179443A (en) * | 2017-12-21 | 2018-06-19 | 云南云铝润鑫铝业有限公司 | Aluminium electroloysis extremely goes up insulation material multiple stage crushing, except iron and charging process |
| CN108505067A (en) * | 2018-06-15 | 2018-09-07 | 甘肃东兴铝业有限公司 | A kind of anodes used in aluminum electrolysis mulch |
| CN109023423A (en) * | 2018-07-17 | 2018-12-18 | 甘肃东兴铝业有限公司 | Method for producing high-quality Al99.90 product by using 500kA aluminum electrolytic cell |
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2019
- 2019-12-26 CN CN201911364378.9A patent/CN111041526A/en active Pending
Patent Citations (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US4490233A (en) * | 1982-05-18 | 1984-12-25 | Aluminium De Grece | Process for thermally insulating precalcined anodes in electrolysis cells for the production of aluminum |
| CN101748435A (en) * | 2008-12-05 | 2010-06-23 | 贵阳铝镁设计研究院 | Method and system for cleaning and reclaiming electrolyte |
| CN108179443A (en) * | 2017-12-21 | 2018-06-19 | 云南云铝润鑫铝业有限公司 | Aluminium electroloysis extremely goes up insulation material multiple stage crushing, except iron and charging process |
| CN108505067A (en) * | 2018-06-15 | 2018-09-07 | 甘肃东兴铝业有限公司 | A kind of anodes used in aluminum electrolysis mulch |
| CN109023423A (en) * | 2018-07-17 | 2018-12-18 | 甘肃东兴铝业有限公司 | Method for producing high-quality Al99.90 product by using 500kA aluminum electrolytic cell |
Non-Patent Citations (2)
| Title |
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| 杨涛: "关于电解质渣壳返回系统工艺的改进和应用", 《有色金属设计》 * |
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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN112342574A (en) * | 2020-11-06 | 2021-02-09 | 云南云铝润鑫铝业有限公司 | Method for recycling waste cell lining electrolyte material of aluminum cell |
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Application publication date: 20200421 |
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