CN1279215C - Si3N4 and SiC bonded shaped brick for side wall of high temperature furnace aluminium cell - Google Patents
Si3N4 and SiC bonded shaped brick for side wall of high temperature furnace aluminium cell Download PDFInfo
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- CN1279215C CN1279215C CN 200410030785 CN200410030785A CN1279215C CN 1279215 C CN1279215 C CN 1279215C CN 200410030785 CN200410030785 CN 200410030785 CN 200410030785 A CN200410030785 A CN 200410030785A CN 1279215 C CN1279215 C CN 1279215C
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- brick
- sic
- conjunction
- side wall
- fire resistant
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Abstract
The present invention relates to an Si3N4 and SiC combined special-shaped brick used for the side wall of an aluminium electrolytic tank of a high-temperature furnace body, which belongs to the technical field of preparing fire resistant material. The present invention is characterized in that one or a plurality of grooves are arranged on a non working surface with a large area of the Si3N4 and SiC combined brick; when the Si3N4 and SiC combined brick is used as the side wall of an aluminium electrolytic tank, the grooves can be bonded to one or a plurality of carbon fire resistant bricks with corresponding shapes through fire resistant mortar to form compact combination. In this way, a composite brick whole body with a corresponding external dimension is formed by the combination of the Si3N4 and SiC combined brick and the carbon fire resistant brick. The fire resistant brick with composite structure not only utilizes the advantage that the Si3N4 and SiC combined brick can effectively prevent the penetration and the erosion of high-temperature melting bodies, but also utilizes the characteristics of high heat conductivity and low cost of the carbon fire resistant brick. If the composite brick is used, the service lives of fire resistant bricks can be guaranteed, and simultaneously, the cost of fire resistant bricks and the production cost of aluminium electrolysis can be reduced.
Description
Technical field
The present invention relates to the special-shaped Si of a kind of high-temperature furnace body aluminum electrolytic bath side wall
3N
4In conjunction with the SiC brick, belong to the refractory material preparation
Technical field.
Background technology
The refractory materials that aluminum electrolytic bath side wall uses at present is carbon refractory brick, silicon nitride combined silicon carbide refractory brick, silicon nitride combined silicon carbide refractory brick and carbon refractory brick compound composite brick structure.Carbon refractory brick is easy to be damaged by high temperature oxidation and causes the aluminum electrolytic bath side wall life-span short and because conduction causes the big problem of electric energy loss; Silicon nitride combined silicon carbide refractory brick resistance of oxidation is better than carbon refractory brick, anti-sodium aluminum fluoride ionogen liquation erosional competency is better, electrical insulation capability is better, electric energy loss is less, the advantage of long working life, but there is the big price problem of higher of manufacturing cost in it.And, because Si
3N
4Thick brick (general thickness is greater than 75mm) in conjunction with SiC, nitrogen can not effectively be penetrated into brick body inside and generate the silicon nitride bonded silicon phase with silica flour generation nitridation reaction in process of production, cause easily the inner silicon powder nitride of silicon nitride combined silicon carbide refractory brick not exclusively, layering, sandwich, the quality problems such as brick strength is low, and then bring the direct problem that affects the result of use of silicon nitride combined silicon carbide refractory brick.
In recent years, taked silicon nitride combined silicon carbide refractory brick and carbon refractory brick plane to paste compound composite brick structure.This plane stickup compound silicon nitride combined silicon carbide refractory brick and carbon refractory brick composite brick structure can reduce the cost of aluminum electrolyzing cell used refractory brick.But still have carbon refractory brick to be exposed in the high temperature air at the top of this composite brick structure, carbon refractory brick is the oxidized phenomenon that causes the unusual damage of this composite brick structure partial easily; Simultaneously, Si
3N
4There is the out-of-flatness problem in the side of four thickness directions of the composite brick structure of mutually pasting in conjunction with SiC brick and carbon refractory brick, aluminum electrolytic bath side wall Si
3N
4Gap in conjunction with the mutual fire clay puzzle joint of SiC brick is bigger, and the puzzle joint sealing is relatively poor, more can not adopt the new technology of laying bricks that realizes laid dry.This situation causes the hot melt body in the aluminium cell to pass through Si easily
3N
4To brick body internal penetration and erosion, the service life of aluminium cell in serious threat in conjunction with the mutual puzzle joint of SiC brick.This makes this composite brick structure not reach the result of use of expection, brings the direct work-ing life that influences silicon nitride combined silicon carbide refractory brick on the contrary, causes the waste of silicon nitride combined silicon carbide refractory brick.
Summary of the invention
Purpose of the present invention is exactly to paste the problems referred to above that compound silicon nitride combined silicon carbide refractory brick and carbon refractory brick composite brick structure brick exist for existing plane, proposes a kind of special-shaped Si of high-temperature furnace body aluminum electrolytic bath side wall of being permeated and corrode by hot melt body of can effectively preventing
3N
4In conjunction with the SiC brick.
The special-shaped Si of a kind of high-temperature furnace body aluminum electrolytic bath side wall that the present invention proposes
3N
4In conjunction with the SiC brick, it is characterized in that: described at Si
3N
4In conjunction with offering one or several groove on the bigger non-working surface of an area of SiC brick body, band fluted body Si
3N
4When being used for the side wall of aluminium cell, its groove part can bond by refractory mortar with the carbon refractory brick of one or several corresponding shape, consists of closely combination, forms a Si in conjunction with the SiC brick
3N
4Be combined with each other with carbon refractory brick and appearance and size matches and consistent composite brick integral body in conjunction with the SiC brick.
At above-mentioned special-shaped Si
3N
4In the SiC brick, described groove part is trapezoidal, right angled triangle, rectangle, circle, the ellipse of rule, any in the irregular polygon.
At above-mentioned special-shaped Si
3N
4In the SiC brick, the degree of depth of described groove is Si
3N
4In conjunction with 1/10th to 8/10ths of SiC brick body thickness, the opening gross area of groove is Si
3N
4In conjunction with the area of the bigger non-working surface of SiC brick bulk area 99% to 10% between.
At above-mentioned special-shaped Si
3N
4In the SiC brick, described groove part can bond by refractory mortar with the refractory brick of other material of one or several corresponding shape, consists of closely combination, forms a Si
3N
4In conjunction with SiC brick and this composite brick integral body that material refractory brick is combined with each other and appearance and size matches consistent.
This aluminum electrolytic bath side wall Si with groove structure provided by the invention
3N
4In conjunction with the composite construction of SiC brick and carbon refractory brick, both utilized Si
3N
4Effectively prevent the advantage being permeated and corrode by hot melt body in conjunction with the SiC brick, utilized again the characteristics of the high heat conduction lower cost of carbon refractory brick.Use this Si with groove structure
3N
4Be combined with each other in conjunction with SiC brick and carbon refractory brick and form that appearance and size matches and consistent composite brick body, the side wall that both can guarantee aluminium cell is used refractory brick service life, can reduce again aluminum electrolytic bath side wall with the cost of refractory brick and the production cost of aluminium electroloysis.
Description of drawings
The Si of a groove of Fig. 1 band
3N
4In conjunction with SiC brick body schematic diagram.
The Si of three grooves of Fig. 2 band
3N
4In conjunction with SiC brick body schematic diagram.
The Si of four grooves of Fig. 3 band
3N
4In conjunction with SiC brick body schematic diagram.
Fig. 4 Si of the present invention
3N
4In conjunction with the partial cutaway schematic after SiC brick body and the carbon brick combination.
Embodiment
Below in conjunction with accompanying drawing technical scheme of the present invention is described further:
The side wall Si of aluminium cell
3N
4In conjunction with SiC brick body two sides that area is bigger are arranged, one of them side contacts with hot melt body in the aluminium cell, can be described as working face; And another side corresponding with working face does not contact with hot melt body in the aluminium cell, and it can contact with carbon refractory brick, also can contact with the steel construction of aluminium electroloysis cell body, can be described as non-working surface.The present invention is the side wall Si at aluminium cell
3N
4Offer one (seeing shown in Figure 1) or several groove (seeing Fig. 2 and shown in Figure 3) on the non-working surface in conjunction with SiC brick body, the degree of depth of groove is at Si
3N
4In conjunction with SiC brick body thickness 1/10th to 8/10ths between, the opening gross area of groove is Si
3N
4In conjunction with the area of the bigger non-working surface of SiC brick bulk area 99% to 10% between; Groove part can be trapezoidal, rectangle, circle, the ellipse of rule, also can irregular polygon.Si with the fluted body shape facility of the present invention
3N
4In conjunction with the SiC brick, be included in Si
3N
4In conjunction with (for example: various metal simple-substances being added with various sintering agents in the SiC brick; Various metal oxides, various metallic salts; Various rare earth elements and rare earth oxide and its esters; Various non-metal simple-substance; Various nonmetal oxides and its esters) all band fluted body Si that are used for aluminum electrolytic bath side wall
3N
4In conjunction with SiC brick kind.This band fluted body Si
3N
4When being used for the side wall of aluminium cell, its groove part can bond by refractory mortar with the carbon refractory brick of one or several corresponding shape, consists of closely combination, forms a Si in conjunction with the SiC brick
3N
4Be combined with each other with carbon refractory brick and appearance and size matches and consistent composite brick integral body in conjunction with the SiC brick, see shown in Figure 4,1-refractory mortar bond line, 2-Si
3N
4In conjunction with SiC brick body, 3-carbon brick body.
Utilize the whole composite brick of technology preparation of the present invention to have following advantage:
1, aluminum electrolytic bath side wall Si3N
4With the fluted body structure, can reduce the weight of brick body in conjunction with the SiC brick, reduce aluminum electrolytic bath side wall Si3N
4Expense in conjunction with the SiC brick.
2、Si
3N
4In conjunction with the SiC brick with inlaying and paste carbon refractory brick in the fluted body structure, can be fire-resistant carbonaceous Brick and high temperature air are isolated, have avoided the oxidation damage of carbon refractory brick. Can prolong aluminum electrolytic bath side wall Si3N
4In conjunction with The life-span of SiC brick and carbon refractory brick composite brick body.
3, can avoid the leaky of carbon refractory brick, saves energy.
4, can guarantee aluminum electrolytic bath side wall Si3N
4Globality in conjunction with SiC brick and carbon refractory brick composite brick body.
5, can avoid because Si3N
4Too thick in conjunction with the SiC brick, nitrogen can not be penetrated into brick effectively in process of production Body is inner to generate the silicon nitride bonded silicon phase with silica flour generation nitridation reaction, causes easily silicon nitride combined silicon carbide refractory brick inside Silicon powder nitride not exclusively, layering, sandwich, the quality problems such as brick strength is low, and bring the direct silicon nitride bonded silicon carbon that affects The problem of the result of use of SiClx refractory brick.
6, with the aluminum electrolytic bath side wall Si of groove structure3N
4In conjunction with the SiC brick, kept Si3N
4In conjunction with the integrality of four thickness direction sides of SiC brick, avoided the Si of original employing3N
4The out-of-flatness problem of four thickness direction sides of the composite brick structure of mutually pasting in conjunction with SiC brick and carbon refractory brick is conducive to reduce aluminum electrolytic bath side wall Si3N
4Knot Close the gap of the mutual puzzle joint fire clay of SiC brick, even can realize laid dry without fire clay. This can improve brick greatly Sealing between the seam, thus prevent that effectively the hot melt body in the aluminium cell from passing through Si3N
4Mutual in conjunction with the SiC brick Puzzle joint is to brick body internal penetration and erosion, to playing an important role the service life that prolongs aluminium cell.
Claims (3)
1, the special-shaped Si of a kind of high-temperature furnace body aluminum electrolytic bath side wall
3N
4In conjunction with the SiC brick, it is characterized in that: described at Si
3N
4In conjunction with offering one or several groove on the bigger non-working surface of an area of SiC brick body, band fluted body Si
3N
4When being used for the side wall of aluminium cell, its groove part can bond by refractory mortar with the carbon refractory brick of one or several corresponding shape, consists of closely combination, forms a Si in conjunction with the SiC brick
3N
4Be combined with each other with carbon refractory brick and appearance and size matches and consistent composite brick integral body in conjunction with the SiC brick.
2, the special-shaped Si of a kind of high-temperature furnace body aluminum electrolytic bath side wall according to claim 1
3N
4In conjunction with the SiC brick, it is characterized in that: any in the trapezoidal or polygon of rule of described groove part.
3, the special-shaped Si of a kind of high-temperature furnace body aluminum electrolytic bath side wall according to claim 1
3N
4In conjunction with the SiC brick, it is characterized in that: the degree of depth of described groove is Si
3N
4In conjunction with 1/10th to 8/10ths of SiC brick body thickness, the opening gross area of groove is Si
3N
4In conjunction with the area of the bigger non-working surface of SiC brick bulk area 99% to 10% between.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 200410030785 CN1279215C (en) | 2004-04-09 | 2004-04-09 | Si3N4 and SiC bonded shaped brick for side wall of high temperature furnace aluminium cell |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 200410030785 CN1279215C (en) | 2004-04-09 | 2004-04-09 | Si3N4 and SiC bonded shaped brick for side wall of high temperature furnace aluminium cell |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN1594661A CN1594661A (en) | 2005-03-16 |
| CN1279215C true CN1279215C (en) | 2006-10-11 |
Family
ID=34664184
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN 200410030785 Expired - Fee Related CN1279215C (en) | 2004-04-09 | 2004-04-09 | Si3N4 and SiC bonded shaped brick for side wall of high temperature furnace aluminium cell |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN1279215C (en) |
Families Citing this family (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN101348921B (en) * | 2007-07-16 | 2012-05-23 | 沈阳铝镁设计研究院有限公司 | Composite construction and composite method of aluminum cell side masonry block and special masonry block |
| CN101492937B (en) * | 2009-02-23 | 2011-03-16 | 刘健 | Construction method for water stop belt for moisture-proof water stop |
| CN101717254A (en) * | 2009-12-01 | 2010-06-02 | 陕西盛华冶化有限公司 | Masonry material of silicon-calcium-iron alloy furnace taphole and maintaining technology |
| CN103122463B (en) * | 2011-11-21 | 2015-07-22 | 沈阳铝镁设计研究院有限公司 | Heat-insulated type cell lining side composite block for aluminium electrolysis cell |
| 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 |
| WO2014077720A1 (en) * | 2012-11-13 | 2014-05-22 | Общество с ограниченной ответственностью "Объединенная Компания РУСАЛ Инженерно-технологический центр" | Lining for an aluminium electrolyzer having inert anodes |
-
2004
- 2004-04-09 CN CN 200410030785 patent/CN1279215C/en not_active Expired - Fee Related
Also Published As
| Publication number | Publication date |
|---|---|
| CN1594661A (en) | 2005-03-16 |
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