CN103122463B - Heat-insulated type cell lining side composite block for aluminium electrolysis cell - Google Patents
Heat-insulated type cell lining side composite block for aluminium electrolysis cell Download PDFInfo
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- CN103122463B CN103122463B CN201110369319.8A CN201110369319A CN103122463B CN 103122463 B CN103122463 B CN 103122463B CN 201110369319 A CN201110369319 A CN 201110369319A CN 103122463 B CN103122463 B CN 103122463B
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- heat
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- groove
- silicon nitride
- cell
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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
Abstract
The invention relaters to a lining side composite block, and particularly relates to a heat-insulated type cell lining side composite block for an aluminium electrolysis cell in the field of cell linings for aluminium electrolysis cells. The heat-insulated type cell lining side composite block comprises a carbide bonded silicon nitride side block, a cell shell and a specially-shaped block; and the heat-insulated type cell lining side composite block is characterized in that a groove is formed in one side contacted with the cell shell, of the carbide bonded silicon nitride side block; a heat-insulated layer is installed in the groove; and the heat-insulated layer in the groove is sealed with the cell shell via an electrolyte steam corrosion-resistant material. The heat-insulated type cell lining side composite block disclosed by the invention has the following advantages and effects that: the installation form of a melt area heat-insulated layer in the traditional heat-insulated type electrolysis cell lining structure is changed, the heat-insulated layer is inlaid in the groove of the carbide bonded silicon nitride side block and sealed via the electrolyte steam corrosion-resistant material so as to be integrally sintered with the carbide bonded silicon nitride side block, so that long-term maintenance for the material performance of the heat-insulated layer and maintenance for the heat balance performance of the electrolysis cell are promoted, and the service life of the electrolysis cell can be prolonged; therefore, the heat-insulated type cell lining side composite block is extremely high in practical application value.
Description
Technical field
The present invention relates to a kind of liner sidepiece composite block, particularly relate to a kind of heat preservation aluminum electrolytic bath liner sidepiece composite block of aluminium electrolysis cell liner field.
Background technology
At present, pursue the production operation mode of low pole span, low voltage, less energy-consumption in domestic electrolysis of aluminum industry, the electrolyzer of convention liner structure design there will be heat income to be reduced and the problem of heat dissipation capacity increasing, makes electrolyzer in actual production, there will be the phenomenon of cold trap.Therefore, particularly important to the insulation of the electrolyzer melt zone that subnormal voltage operation is produced.Electrolyzer in existing production adopts the mode of wrapping up special lagging material or brushing thermal insulation coatings at pot shell outer wall mostly, the electrolyzer of new construction generally adopts the mode of adding thermal insulation layer between side block and pot shell to solve the problem of cold trap in production, thus ensures that electrolyzer runs the relation keeping electrolyzer thermal equilibrium and energy balance under low voltage condition.To the electrolyzer of existing production, owing to limiting by external conditions, be a kind of desirable mode by obtaining target productive capacity in the mode of pot shell outer wall parcel thermal insulation layer; To the electrolyzer of new construction, although the mode increasing thermal insulation layer between pot shell and side block can meet electrolyzer thermal equilibrium and energy balance relations at lower voltages, thus ensure that electrolyzer long-term stability is produced, but this kind of heat preserving mode can be subject to the restriction of the factors such as material property, as the impact of lagging material electrolyte-resistant steam corrosion performance, the lagging material index such as compressive strength and cathode paste shrinkability under the high temperature conditions.If lagging material electrolyte-resistant steam corrosion and under the high temperature conditions compressive strength are poor, the phenomenons such as rotten or lower thickness can be there is in thermal insulation layer in electrolysis production, make it in electrolyzer long-term production process, lose original insulation effect, thus destroy electrolyzer thermal equilibrium relation, be unfavorable for that electrolyzer long-term stability is produced.In addition, if the thermal insulation layer problems co-exist that compressive strength is poor and cathode paste shrinking percentage is large under the high temperature conditions, cathode paste contracted width and thermal insulation layer contracted width sum can be there is be greater than cathode carbon pieces and expand the phenomenon of the width increased in actual production, make the gap that electrolyzer sidepiece produces, thus add and ooze groove risk, serious meeting causes electrolyzer early damage.
Summary of the invention
The present invention is for solving the problems of the technologies described above and a kind of heat preservation aluminum electrolytic bath liner sidepiece composite block provided, object is long-term maintenance thermal insulation layer material property while, reduce electrolyzer sidepiece and produce gap probability, long-term guarantee electrolyzer thermal equilibrium, ensures that electrolyzer long-term stability is produced.
For reaching a kind of heat preservation aluminum electrolytic bath of above-mentioned purpose the present invention liner sidepiece composite block, comprise silicon nitride combined silicon carbide side block, pot shell and special-shape carbon block, contact side at silicon nitride combined silicon carbide side block with pot shell and have groove, be provided with thermal insulation layer in groove, groove inner thermal insulating layer and and pot shell between be provided with electrolyte-resistant steam corrosion material.
Be provided with transverse frame and longitudinal edge frame in described groove, thermal insulation layer is arranged in transverse and longitudinal frame.
For the sidepiece composite block of length at 300 ~ 800mm, transverse frame and longitudinal edge moulding number≤10.
Depth of groove is insulation layer thickness and electrolyte-resistant steam corrosion material thickness sum.
Silicon nitride combined silicon carbide side block span width >=75mm, silicon nitride combined silicon carbide side block width is depth of groove and silicon nitride combined silicon carbide side block span width sum, and transverse and longitudinal border width is 10 ~ 50mm.
Advantageous effect of the present invention: the installation form changing melt zone thermal insulation layer in traditional thermal-insulating type cell lining structure, thermal insulation layer is embedded in silicon nitride combined silicon carbide side block groove, adopt silicon carbide refractory mortar sealed sintering integral, be conducive to keeping thermal insulation layer material property for a long time, maintain electrolyzer thermal equilibrium performance, electrolyzer work-ing life can be extended, there is very strong actual application value.
Accompanying drawing explanation
Fig. 1 is conventional vacuum type aluminium electrolysis cell liner side bilge construction schematic diagram.
Fig. 2 is heat preservation aluminum electrolytic bath liner sidepiece composite block schematic diagram of the present invention.
Fig. 3 is that the A of Fig. 2 is to schematic diagram.
Fig. 4 is the I portion enlarged view of Fig. 2.
Fig. 5 is sidepiece composite block physical dimension schematic diagram.
In figure: 1, silicon nitride combined silicon carbide side block; 2, special-shape carbon block; 3, thermal insulation layer; 4, silicon carbide refractory mortar; 5, pot shell; 6, transverse frame; 7, longitudinal edge frame.
Embodiment
Below in conjunction with accompanying drawing, the invention will be further described.
A kind of heat preservation aluminum electrolytic bath of the present invention liner sidepiece composite block as shown in the figure, comprise rectangle silicon nitride combined silicon carbide side block 1, pot shell 5 and special-shape carbon block 2, contact side at silicon nitride combined silicon carbide side block 1 with pot shell 5 and have groove, transverse frame 6 and longitudinal edge frame 7 is provided with in groove, thermal insulation layer 3 is arranged in transverse frame 6 and longitudinal edge frame 7, groove inner thermal insulating layer 3 and and pot shell 5 between be provided with electrolyte-resistant steam corrosion material 4.
For the sidepiece composite block of length at 300 ~ 800mm, transverse frame and longitudinal edge moulding number≤10, depth of groove is thermal insulation layer 3 thickness and electrolyte-resistant steam corrosion material 4 thickness sum.
Silicon nitride combined silicon carbide side block 1 span width >=75mm, silicon nitride combined silicon carbide side block 1 width is depth of groove and silicon nitride combined silicon carbide side block 1 span width sum, and transverse frame 6 and longitudinal edge frame 7 width are 10 ~ 50mm.
Rectangle silicon nitride combined silicon carbide side block 1 and special-shape carbon block 2 are combined by bonding before and after binding agent by the present invention, are combined into one after sintering.For strengthening silicon nitride combined silicon carbide side block bulk strength, ensureing that silicon nitride combined silicon carbide side block contacts firmly with being formed between pot shell, multiple tracks transverse frame and longitudinal edge frame can be established in a groove; Thermal insulation layer is arranged in transverse and longitudinal frame, then outside thermal insulation layer, uses electrolyte-resistant steam corrosion material seal; The side surface upper part of special-shape carbon block is provided with inclined-plane, and prick on solid contact surface at special-shape carbon block 2 and cathode paste and be provided with groove, the cathode paste that groove makes bundle solid is more closely knit, firmly.Before silicon nitride combined silicon carbide side block and special-shape carbon block sintering, well-chosen need be carried out by width dimensions, often during group composite block selection, special-shape carbon block lengthwise dimension is more bigger than silicon nitride combined silicon carbide side block, deviation is 0 ~ 2mm, in order to avoid adjacent side composite block special-shape carbon block break joint is excessive after assembling, increase the risk of seepage ionogen and aluminium liquid in producing.
Claims (5)
1. a heat preservation aluminum electrolytic bath liner sidepiece composite block, comprise silicon nitride combined silicon carbide side block, pot shell and special-shape carbon block, it is characterized in that contacting side at silicon nitride combined silicon carbide side block with pot shell has groove, be provided with thermal insulation layer in groove, groove inner thermal insulating layer and and pot shell between be provided with electrolyte-resistant steam corrosion material.
2. a kind of heat preservation aluminum electrolytic bath liner sidepiece composite block according to claim 1, it is characterized in that being provided with transverse frame and longitudinal edge frame in described groove, thermal insulation layer is located in transverse and longitudinal frame.
3. a kind of heat preservation aluminum electrolytic bath liner sidepiece composite block according to claim 1, is characterized in that transverse frame and longitudinal edge moulding number≤10.
4. a kind of heat preservation aluminum electrolytic bath liner sidepiece composite block according to claim 1, is characterized in that depth of groove is insulation layer thickness and electrolyte-resistant steam corrosion material thickness sum.
5. a kind of heat preservation aluminum electrolytic bath liner sidepiece composite block according to claim 1, it is characterized in that silicon nitride combined silicon carbide side block span width >=75mm, silicon nitride combined silicon carbide side block width is depth of groove and silicon nitride combined silicon carbide side block span width sum, and transverse frame and longitudinal edge width of frame are 10 ~ 50mm.
Priority Applications (3)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201110369319.8A CN103122463B (en) | 2011-11-21 | 2011-11-21 | Heat-insulated type cell lining side composite block for aluminium electrolysis cell |
| MYPI2014701288A MY173928A (en) | 2011-11-21 | 2012-10-23 | Liner lateral composite block of heat preservation aluminum-electrolytic tank |
| PCT/CN2012/001414 WO2013075396A1 (en) | 2011-11-21 | 2012-10-23 | Lateral composite block for liner in heat-insulating aluminum electrolysis cell |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201110369319.8A CN103122463B (en) | 2011-11-21 | 2011-11-21 | Heat-insulated type cell lining side composite block for aluminium electrolysis cell |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN103122463A CN103122463A (en) | 2013-05-29 |
| CN103122463B true CN103122463B (en) | 2015-07-22 |
Family
ID=48453599
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201110369319.8A Active CN103122463B (en) | 2011-11-21 | 2011-11-21 | Heat-insulated type cell lining side composite block for aluminium electrolysis cell |
Country Status (3)
| Country | Link |
|---|---|
| CN (1) | CN103122463B (en) |
| MY (1) | MY173928A (en) |
| WO (1) | WO2013075396A1 (en) |
Families Citing this family (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN103668329A (en) * | 2012-08-31 | 2014-03-26 | 沈阳铝镁设计研究院有限公司 | Side block composite filling material structure |
| FR3023301B1 (en) * | 2014-07-04 | 2016-07-01 | Rio Tinto Alcan Int Ltd | ELECTROLYSIS TANK |
| CN105316703A (en) * | 2014-07-22 | 2016-02-10 | 沈阳铝镁设计研究院有限公司 | Warm-keeping type aluminium-electrolysis-cell inner liner structure |
| CN108048874A (en) * | 2017-12-29 | 2018-05-18 | 山西晋阳碳素有限公司 | Silicon nitride bonded silicon carbon block clad aluminum side wall carbon block |
Family Cites Families (9)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN2060215U (en) * | 1989-05-22 | 1990-08-08 | 夏福德 | Compound refractory brick |
| US6638412B2 (en) * | 2000-12-01 | 2003-10-28 | Moltech Invent S.A. | Prevention of dissolution of metal-based aluminium production anodes |
| ATE284983T1 (en) * | 2001-03-07 | 2005-01-15 | Moltech Invent Sa | ALUMINUM WETTABLE POROUS CERAMIC MATERIAL |
| NO318012B1 (en) * | 2003-03-17 | 2005-01-17 | Norsk Hydro As | Structural elements for use in an electrolytic cell |
| CN1279215C (en) * | 2004-04-09 | 2006-10-11 | 清华大学 | Si3N4 and SiC bonded shaped brick for side wall of high temperature furnace aluminium cell |
| CN100415938C (en) * | 2004-12-27 | 2008-09-03 | 沈阳铝镁设计研究院 | Lining structure of aluminium electrolytic bath |
| CN101423955A (en) * | 2008-11-21 | 2009-05-06 | 中国铝业股份有限公司 | Lining structure of large-sized aluminum cell |
| CN201908138U (en) * | 2010-12-17 | 2011-07-27 | 贵阳铝镁设计研究院有限公司 | Heat-preserving inside-lining structure of aluminum electrolytic cell |
| CN202369656U (en) * | 2011-11-22 | 2012-08-08 | 中国铝业股份有限公司 | Side part inner liner for aluminum electrolysis cell |
-
2011
- 2011-11-21 CN CN201110369319.8A patent/CN103122463B/en active Active
-
2012
- 2012-10-23 WO PCT/CN2012/001414 patent/WO2013075396A1/en active Application Filing
- 2012-10-23 MY MYPI2014701288A patent/MY173928A/en unknown
Also Published As
| Publication number | Publication date |
|---|---|
| MY173928A (en) | 2020-02-27 |
| CN103122463A (en) | 2013-05-29 |
| WO2013075396A1 (en) | 2013-05-30 |
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