CN1049930C - Method of making industrial aluminium electrolytic tank chemical guard by using magnesium oxide and calcium oxide materials - Google Patents
Method of making industrial aluminium electrolytic tank chemical guard by using magnesium oxide and calcium oxide materials Download PDFInfo
- Publication number
- CN1049930C CN1049930C CN96115442A CN96115442A CN1049930C CN 1049930 C CN1049930 C CN 1049930C CN 96115442 A CN96115442 A CN 96115442A CN 96115442 A CN96115442 A CN 96115442A CN 1049930 C CN1049930 C CN 1049930C
- Authority
- CN
- China
- Prior art keywords
- cao
- mgo
- powder
- weight percent
- thermal insulation
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Expired - Fee Related
Links
- 229910052782 aluminium Inorganic materials 0.000 title claims abstract description 16
- 239000000126 substance Substances 0.000 title claims abstract description 16
- XAGFODPZIPBFFR-UHFFFAOYSA-N aluminium Chemical compound [Al] XAGFODPZIPBFFR-UHFFFAOYSA-N 0.000 title claims abstract description 12
- 239000004411 aluminium Substances 0.000 title claims abstract description 8
- 238000004519 manufacturing process Methods 0.000 title claims description 10
- 239000000292 calcium oxide Substances 0.000 title description 10
- ODINCKMPIJJUCX-UHFFFAOYSA-N calcium oxide Inorganic materials [Ca]=O ODINCKMPIJJUCX-UHFFFAOYSA-N 0.000 title description 10
- 239000000395 magnesium oxide Substances 0.000 title description 10
- CPLXHLVBOLITMK-UHFFFAOYSA-N magnesium oxide Inorganic materials [Mg]=O CPLXHLVBOLITMK-UHFFFAOYSA-N 0.000 title description 10
- 239000000463 material Substances 0.000 title description 5
- BRPQOXSCLDDYGP-UHFFFAOYSA-N calcium oxide Chemical compound [O-2].[Ca+2] BRPQOXSCLDDYGP-UHFFFAOYSA-N 0.000 title description 2
- AXZKOIWUVFPNLO-UHFFFAOYSA-N magnesium;oxygen(2-) Chemical compound [O-2].[Mg+2] AXZKOIWUVFPNLO-UHFFFAOYSA-N 0.000 title description 2
- 239000000843 powder Substances 0.000 claims abstract description 25
- 239000011449 brick Substances 0.000 claims abstract description 19
- TWNQGVIAIRXVLR-UHFFFAOYSA-N oxo(oxoalumanyloxy)alumane Chemical compound O=[Al]O[Al]=O TWNQGVIAIRXVLR-UHFFFAOYSA-N 0.000 claims abstract description 13
- 238000009413 insulation Methods 0.000 claims description 14
- 238000000034 method Methods 0.000 claims description 12
- 238000005868 electrolysis reaction Methods 0.000 claims description 8
- 239000000203 mixture Substances 0.000 claims description 8
- AZDRQVAHHNSJOQ-UHFFFAOYSA-N alumane Chemical compound [AlH3] AZDRQVAHHNSJOQ-UHFFFAOYSA-N 0.000 claims description 4
- 239000002994 raw material Substances 0.000 claims 4
- 239000011812 mixed powder Substances 0.000 abstract description 3
- 239000003792 electrolyte Substances 0.000 abstract description 2
- OKTJSMMVPCPJKN-UHFFFAOYSA-N Carbon Chemical compound [C] OKTJSMMVPCPJKN-UHFFFAOYSA-N 0.000 abstract 1
- 229910052799 carbon Inorganic materials 0.000 abstract 1
- 239000004927 clay Substances 0.000 abstract 1
- 230000007797 corrosion Effects 0.000 abstract 1
- 238000005260 corrosion Methods 0.000 abstract 1
- 230000002349 favourable effect Effects 0.000 abstract 1
- 238000002844 melting Methods 0.000 abstract 1
- 230000008018 melting Effects 0.000 abstract 1
- 238000000465 moulding Methods 0.000 abstract 1
- VNWKTOKETHGBQD-UHFFFAOYSA-N methane Chemical compound C VNWKTOKETHGBQD-UHFFFAOYSA-N 0.000 description 3
- DGAQECJNVWCQMB-PUAWFVPOSA-M Ilexoside XXIX Chemical compound C[C@@H]1CC[C@@]2(CC[C@@]3(C(=CC[C@H]4[C@]3(CC[C@@H]5[C@@]4(CC[C@@H](C5(C)C)OS(=O)(=O)[O-])C)C)[C@@H]2[C@]1(C)O)C)C(=O)O[C@H]6[C@@H]([C@H]([C@@H]([C@H](O6)CO)O)O)O.[Na+] DGAQECJNVWCQMB-PUAWFVPOSA-M 0.000 description 2
- 238000006243 chemical reaction Methods 0.000 description 2
- 238000010586 diagram Methods 0.000 description 2
- 230000003628 erosive effect Effects 0.000 description 2
- 239000011734 sodium Substances 0.000 description 2
- 229910052708 sodium Inorganic materials 0.000 description 2
- 101100230509 Neurospora crassa (strain ATCC 24698 / 74-OR23-1A / CBS 708.71 / DSM 1257 / FGSC 987) hat-1 gene Proteins 0.000 description 1
- 240000007594 Oryza sativa Species 0.000 description 1
- 235000007164 Oryza sativa Nutrition 0.000 description 1
- 229910000831 Steel Inorganic materials 0.000 description 1
- 238000002474 experimental method Methods 0.000 description 1
- 230000009970 fire resistant effect Effects 0.000 description 1
- 238000001764 infiltration Methods 0.000 description 1
- 230000008595 infiltration Effects 0.000 description 1
- 239000012466 permeate Substances 0.000 description 1
- 230000002035 prolonged effect Effects 0.000 description 1
- 235000009566 rice Nutrition 0.000 description 1
- 239000010959 steel Substances 0.000 description 1
- 230000003245 working effect Effects 0.000 description 1
Landscapes
- Electrolytic Production Of Metals (AREA)
Abstract
The present invention relates to a chemical guard plate of an industrial aluminium electrolytic tank, mixing 20 to 90% of MgO powder with 10 to 80% of CaO powder, spreading the mixed powder in the whole space below a cathode carbon block of the aluminium electrolytic tank to replace original refractory bricks, light-weight heat-insulating brick layers and heat-insulating aluminum oxide layers, or spreading the mixed powder between the original refractory bricks and the light-weight heat-insulating layers to replace the original heat-insulating aluminum oxide layers. The melting point of the chemical guard plate of the present invention is 1500 DEG C, and the heat conduction coefficient is 0.278+0.104*10<-1>(t-400) KC/m. hr. DEG C, which is far smaller than that of the ordinary clay firebricks made by pressure molding. The heat conduction coefficient of the ordinary firebricks is 1.4 KC/m. hr. DEG C. Therefore, the guard plate has the advantages of favorable heat insulating property and energy saving. Moreover, the guard plate can resist the corrosion of fused electrolyte and can prolong the service life of the cathode lining of the electrolytic tank.
Description
The present invention relates to a kind of manufacture method of industrial aluminum electrolysis bath chemical guard.
The baffle plate that present numerous aluminium manufacturer is adopted in industrial aluminum electrolysis bath is to make baffle plate with the aluminum oxide of tamping, slows down the seepage velocity of electric matter to liner with the aluminum oxide of tamping.Experiment shows, aluminum oxide is not a kind of satisfied inert material for several chemical reactions that are enough to brokenly inner lining material.In the course of the work, high-temperature fusant, the sodium that produces in ionogen and the production process particularly, progressively in cathode block, refractory brick and thermal insulation layer, permeate the ionogen of infiltration negative electrode bottom and sodium etc. and fire-resistant, lagging material generation chemical reaction, volumetric expansion, produce very big stress, make on the electrolyzer furnace bottom and lift, the pot shell distortion, cathode carbon pieces breaks.Electrolyzer can't be worked, have to stop to produce, lay new liner again, cause very big financial loss.
The object of the present invention is to provide a kind of manufacture method that to resist fused electrolyte erosive chemical guard of producing.
(following components contents all refers to weight percentage) that the present invention is realized by following scheme:
By the component of MgO powder 20-90%, CaO powder 10-80% (weight percent) with in MgO powder and the whole space below the CaO powder mixes the cathode block that is layed in aluminium cell, to replace original refractory brick and light-weight insulating brick layer and aluminum oxide thermal insulation layer, or be layed between original refractory brick and the lightweight thermal insulation layer, replace former aluminum oxide thermal insulation layer.
Chemical guard fusing point of the present invention has enough heat-resistant stabilities at 1500 ℃, can resist to dissolve electrolytical erosion action.Its thermal conductivity is 0.278+0.104 * 10-1 (t-400) kilocalorie/rice. the time. ℃, little more than the general refractory fireclay block of pressure forming.In industrial groove, the temperature of refractory brick is up to 900 ℃, and this moment, the thermal conductivity of mixed powder of the present invention was 0.33 kilocalorie/meter. the time. ℃, and the thermal conductivity of general refractory brick is 1.4 kilocalories/meter. the time. ℃.So this kind baffle plate has good heat-insulating property, save the energy, prolonged the work-ing life of cathode lining of electrolytic bath.
Accompanying drawing 1 is one of the paving mode of a chemical guard synoptic diagram;
Accompanying drawing 2 is two synoptic diagram of the paving mode of chemical guard.
Below by embodiment the present invention is described further:
Embodiment one:
Get 20% MgO powder (its MgO content is 98%) by weight percentage, get 80% CaO powder (CaO content is 98%), mix the back and be layed in the electrolyzer, just obtain the chemical guard of forming by MgO, CaO by mode shown in Figure 1.As shown in Figure 1, aluminium cell is made of electrolyzer box hat 1, side inner lining material 2, cathode carbon pieces 3, steel current conducting rod 4, the mixture of magnesium oxide and calcium oxide is layed in cathode carbon pieces 3 bottoms, replaces traditional refractory brick and light-weight insulating brick layer and aluminum oxide thermal insulation layer, and forms chemical guard 5.
Embodiment two:
Get 40% MgO powder (the MgO powder content is 90%) by weight percentage, get 60% CaO powder (CaO content is 98%), mix the back and be layed between refractory brick 6 and the lightweight thermal insulation layer 7 by mode shown in Figure 2, replace traditional aluminum oxide thermal insulation layer, its thickness is 86mm.
Embodiment three:
Get 90% MgO powder (content is 98%) by weight percentage, get 10% CaO powder (content is 98%), mix the back and lay by Fig. 1 or mode shown in Figure 2.
Claims (5)
1, a kind of manufacture method of industrial aluminum electrolysis bath chemical guard, it is characterized in that by the component of MgO powder 20-90% (weight percent), CaO powder 10-80% (weight percent) in MgO powder and the whole space below the CaO powder mixes the cathode block that is layed in aluminium cell, to replace original refractory brick and light-weight insulating brick layer and aluminum oxide thermal insulation layer, or be layed between original refractory brick and the lightweight thermal insulation layer, replace former aluminum oxide thermal insulation layer.
2, the manufacture method of a kind of industrial aluminum electrolysis bath chemical guard as claimed in claim 1, it is characterized in that its proportioning raw materials and laying method are by 20% (weight percent) MgO powder (MgO content is 98%), after the CaO powder (content of CaO is 98%) of 80% (weight percent) mixes, this MgO and CaO mixture are layed in cathode block 3 bottoms, replace traditional refractory brick and light-weight insulating brick layer and aluminum oxide thermal insulation layer.
3, the manufacture method of industrial aluminum electrolysis bath chemical guard as claimed in claim 1, it is characterized in that its proportioning raw materials and laying method MgO powder (MgO content is 98%) by 40% (weight percent), after the CaO powder of 60% (weight percent) (CaO content is 98%) mixes, this MgO and CaO mixture are layed between refractory brick and the lightweight thermal insulation layer, replace traditional aluminum oxide thermal insulation layer.
4, the manufacture method of industrial aluminum electrolysis bath chemical guard as claimed in claim 1, it is characterized in that its proportioning raw materials and laying method are by 90% (weight percent) MgO powder (MgO content is 98%), after the CaO powder of 10% (weight percent) (CaO content is 98%) mixes, this MgO and CaO mixture are layed in the whole space below the cathode block of aluminium cell.
5, the manufacture method of industrial aluminum electrolysis bath chemical guard as claimed in claim 1, it is characterized in that its proportioning raw materials and laying method MgO powder (MgO content is 98%) by 90% (weight percent), the CaO powder of 10% (weight percent) (CaO content is 98%) is layed in this MgO and CaO mixture between refractory brick and the lightweight thermal insulation layer after mixing.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN96115442A CN1049930C (en) | 1996-07-10 | 1996-07-10 | Method of making industrial aluminium electrolytic tank chemical guard by using magnesium oxide and calcium oxide materials |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN96115442A CN1049930C (en) | 1996-07-10 | 1996-07-10 | Method of making industrial aluminium electrolytic tank chemical guard by using magnesium oxide and calcium oxide materials |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN1151450A CN1151450A (en) | 1997-06-11 |
| CN1049930C true CN1049930C (en) | 2000-03-01 |
Family
ID=5122695
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN96115442A Expired - Fee Related CN1049930C (en) | 1996-07-10 | 1996-07-10 | Method of making industrial aluminium electrolytic tank chemical guard by using magnesium oxide and calcium oxide materials |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN1049930C (en) |
Families Citing this family (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| FR2900665B1 (en) | 2006-05-03 | 2008-06-27 | Carbone Savoie Soc Par Actions | ALUMINUM OBTAINING ELECTROLYSIS TANK |
Citations (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US5314599A (en) * | 1992-07-28 | 1994-05-24 | Alcan International Limited | Barrier layer against fluoride diffusion in linings of aluminum reduction cells |
| CN1113967A (en) * | 1994-06-23 | 1995-12-27 | 浑江铝厂 | Aluminium electrolytic bath with alkaline leak-proof baffle plate |
-
1996
- 1996-07-10 CN CN96115442A patent/CN1049930C/en not_active Expired - Fee Related
Patent Citations (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US5314599A (en) * | 1992-07-28 | 1994-05-24 | Alcan International Limited | Barrier layer against fluoride diffusion in linings of aluminum reduction cells |
| CN1113967A (en) * | 1994-06-23 | 1995-12-27 | 浑江铝厂 | Aluminium electrolytic bath with alkaline leak-proof baffle plate |
Also Published As
| Publication number | Publication date |
|---|---|
| CN1151450A (en) | 1997-06-11 |
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