CN101058890A - Method of roasting and starting blast groove type aluminum electrolysis bath - Google Patents
Method of roasting and starting blast groove type aluminum electrolysis bath Download PDFInfo
- Publication number
- CN101058890A CN101058890A CN 200710118813 CN200710118813A CN101058890A CN 101058890 A CN101058890 A CN 101058890A CN 200710118813 CN200710118813 CN 200710118813 CN 200710118813 A CN200710118813 A CN 200710118813A CN 101058890 A CN101058890 A CN 101058890A
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- Prior art keywords
- roasting
- coke
- groove type
- starting
- type aluminum
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- 238000000034 method Methods 0.000 title claims abstract description 22
- 229910052782 aluminium Inorganic materials 0.000 title claims abstract description 16
- XAGFODPZIPBFFR-UHFFFAOYSA-N aluminium Chemical compound [Al] XAGFODPZIPBFFR-UHFFFAOYSA-N 0.000 title claims abstract description 15
- 238000005868 electrolysis reaction Methods 0.000 title claims description 11
- 239000000571 coke Substances 0.000 claims abstract description 35
- 238000010438 heat treatment Methods 0.000 claims abstract description 7
- 150000001875 compounds Chemical class 0.000 claims description 23
- 239000000843 powder Substances 0.000 claims description 18
- 239000002006 petroleum coke Substances 0.000 claims description 7
- 239000003610 charcoal Substances 0.000 claims description 4
- 239000004411 aluminium Substances 0.000 abstract description 3
- 239000002245 particle Substances 0.000 abstract description 3
- 238000005245 sintering Methods 0.000 abstract 2
- 239000002131 composite material Substances 0.000 abstract 1
- 239000000126 substance Substances 0.000 description 7
- 239000000463 material Substances 0.000 description 6
- OKTJSMMVPCPJKN-UHFFFAOYSA-N Carbon Chemical compound [C] OKTJSMMVPCPJKN-UHFFFAOYSA-N 0.000 description 3
- 229910052799 carbon Inorganic materials 0.000 description 2
- AZDRQVAHHNSJOQ-UHFFFAOYSA-N alumane Chemical compound [AlH3] AZDRQVAHHNSJOQ-UHFFFAOYSA-N 0.000 description 1
- 238000001354 calcination Methods 0.000 description 1
- 238000010276 construction Methods 0.000 description 1
- 238000005516 engineering process Methods 0.000 description 1
- 229910002804 graphite Inorganic materials 0.000 description 1
- 239000010439 graphite Substances 0.000 description 1
- 239000007787 solid Substances 0.000 description 1
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- Electrolytic Production Of Metals (AREA)
Abstract
The invention discloses a sintering starting method of diversion grooved aluminium electrolyzer, which is characterized by the following: paving composite material of metallurgical coke and sintered oil coke between anode and groove bottom coke as heating layer to sinter and start; setting the preheating sintering time for 72-96h; powering 24h to detach a group of diverting piece every 4-6h; entering the current into electrolyzer to sinter at staircase increasing pattern. The invention controls the grain scale of kinds of coke particle strictly, which stablizes the new typed structural eleyctrolyzer.
Description
Technical field
A kind of method of roasting and starting blast groove type aluminum electrolysis bath relates to a kind of aluminium cell, the baking start-up method of particularly novel blast groove type aluminum electrolysis bath
Background technology
At present, the method for roasting and starting aluminum electrolytic cell has molten aluminum roasting method, baking coke particles method, flame roasting method, solid aluminium roasting method etc.Commonly used is the baking coke particles method at present.Its principle is to lay coke grain (or graphite is broken) between the narrow slit of anode and bottom land charcoal piece, makes to realize between anode and the negative electrode being electrically connected, and energising then, the joule heating by means of the resistance of anode, powdered carbon layer and negative electrode produces adds the thermal bake-out electrolyzer.And the novel texture diversion trench is different from general electrolyzer, has diversion trench on the cathode bottom carbon piece, and the used cathode bottom resistivity of novel texture diversion trench is little, and the resistance heat that sends in the roasting process is little, causes the startup difficulty big; Be to guarantee maturing temperature and heat-up rate, make the blast groove type electrolyzer of novel texture can be steadily, the efficient startup, the baking start-up method that needs are new.
Summary of the invention
The problem that the novel texture blast groove type calcination that the objective of the invention is to exist at above-mentioned prior art starts, provide a kind of can be efficiently, the baking start-up method of smooth starting novel texture blast groove type electrolyzer.
The objective of the invention is to be achieved through the following technical solutions.
A kind of method of roasting and starting blast groove type aluminum electrolysis bath is characterized in that being laying metallurgical coke and after-smithing petroleum coke blended compound and carries out roasting and starting as heating layer between the narrow slit of anode and bottom land charcoal piece; The weight ratio of metallurgical coke and after-smithing petroleum coke is that 1.5-4 prepares burden in its compound, compound shop stove thickness 15-20 millimeter, and the preheating and baking time is 72-96 hour; The dismounting of splitter is: removed a component flow behind the energising 24h in every 4-6 hour, electric current increases progressively with ladder and enters roasting in the electrolyzer.
The method of a kind of roasting and starting blast groove type aluminum electrolysis bath of the present invention is characterized in that its metallurgical coke true density is greater than 2.15g.cm
-3, powder resistivity 2000-3000 μ Ω m, granularity 4-1mm.
The method of a kind of roasting and starting blast groove type aluminum electrolysis bath of the present invention, it is characterized in that its forge the back burnt true density greater than 2.05g.cm
-3, powder resistivity 400-580 μ Ω m, granularity 4-1mm.
Method of the present invention, special construction at the novel texture diversion trench, select for use metallurgical coke and after-smithing petroleum coke to mix as heating layer, the size range of the various burnt grains of strict control, main physical and chemical index and the laying depth of compound when shove charge with certain proportion.Control roasting heating curve makes electric current increase progressively with ladder and enters roasting in the electrolyzer when electrobath start, and then reaches purpose efficient, smooth starting novel texture electrolyzer.
Embodiment
A kind of method of roasting and starting blast groove type aluminum electrolysis bath during start-up operation, is laid metallurgical coke and after-smithing petroleum coke blended compound as heating layer between the narrow slit of anode and bottom land charcoal piece; The granularity of its compound is 4mm-1mm, and the weight ratio of metallurgical coke and after-smithing petroleum coke is that 1.5-4 prepares burden in the compound; Its metallurgical coke true density is greater than 2.15g.cm
-3, powder art resistivity 2000-3000 μ Ω m, granularity 4-1mm.Forge the burnt true density in back greater than 2.05g.cm
-3, powder resistivity 400-580 μ Ω m, granularity 4-1mm.Compound shop stove thickness 15-20 millimeter.Consider that novel texture bottom of electrolytic tank resistivity is little, the resistance heat of emitting in the warm is little, and preheating and baking is 72-96 hour.The dismounting of splitter is: removed a component flow in every 4-6 hour behind the energising 24h, thereby realizing that electric current increases progressively with ladder enters roasting in the electrolyzer.
Embodiment 1
According to metallurgical coke is that (weight percent, down with) 60%, refinery coke are 40% to be mixed, and the main physical and chemical index of each material in the compound: the metallurgical coke true density is greater than 2.15g.cm
-3, powder resistivity 2500-3000 μ Ω m, granularity 4 ~ 1mm.Forge the burnt true density in back greater than 2.05g.cm
-3, powder resistivity 500-550 μ Ω m, granularity 4-1mm.20 millimeters of compound shop stove thickness.Preheating and baking 96 hours was removed a component flow in per 6 hours behind the energising 24h, started steadily.
Embodiment 2
According to metallurgical coke is that (weight percent, down with) 70%, refinery coke are 30% to be mixed, and the main physical and chemical index of each material in the compound: the metallurgical coke true density is greater than 2.15g.cm
-3, powder resistivity 2000-2500 μ Ω m, granularity 4-1mm.Forge the burnt true density in back greater than 2.05g.cm
-3, powder resistivity 450-550 μ Ω m, granularity 4-1mm.18 millimeters of compound shop stove thickness.Preheating and baking 90 hours was removed a component flow in per 5.5 hours behind the energising 24h, started steadily.
Embodiment 3
According to metallurgical coke is that (weight percent, down with) 80%, refinery coke are 20% to be mixed, and the main physical and chemical index of each material in the compound: the metallurgical coke true density is greater than 2.15g.cm
-3, powder resistivity 2000-2500 μ Ω m, granularity 4-1mm.Forge the burnt true density in back greater than 2.05g.cm
-3, powder resistivity 500-550 μ Ω m, granularity 4-1mm.15 millimeters of compound shop stove thickness.Preheating and baking 80 hours was removed a component flow in per 5 hours behind the energising 24h, started steadily.
Embodiment 4
According to metallurgical coke is that (weight percent, down with) 70%, refinery coke are 30% to be mixed, and the main physical and chemical index of each material in the compound: the metallurgical coke true density is greater than 2.15g.cm
-3, powder resistivity 2000-2500 μ Ω m, granularity 2-1mm.Forge the burnt true density in back greater than 2.05g.cm
-3, powder resistivity 550-580 μ Ω m, granularity 2-1mm.20 millimeters of compound shop stove thickness.Preheating and baking 72 hours was removed a component flow in per 4 hours behind the energising 24h, started steadily.
Embodiment 5
According to metallurgical coke is that (weight percent, down with) 60%, refinery coke are 40% to be mixed, and the main physical and chemical index of each material in the compound: the metallurgical coke true density is greater than 2.15g.cm
-3, powder resistivity 2500-3000 μ Ω m, granularity 2-1mm.Forge the burnt true density in back greater than 2.05g.cm
-3, powder resistivity 550-580 μ Ω m, granularity 2-1mm.20 millimeters of compound shop stove thickness.Preheating and baking 96 hours was removed a component flow in per 6 hours behind the energising 24h, started steadily.。
Embodiment 6
According to metallurgical coke is that (weight percent, down with) 80%, refinery coke are 20% to be mixed, and the main physical and chemical index of each material in the compound: the metallurgical coke true density is greater than 2.15g.cm
-3, powder resistivity 2000-2500 μ Ω m, granularity 2-1mm.Forge the burnt true density in back greater than 2.05g.cm
-3, powder resistivity 450 ~ 550 μ Ω m, granularity 2-1mm.20 millimeters of compound shop stove thickness.Preheating and baking 96 hours was removed a component flow in per 6 hours behind the energising 24h, started steadily.
Claims (3)
1. the method for a roasting and starting blast groove type aluminum electrolysis bath is characterized in that being laying metallurgical coke and after-smithing petroleum coke blended compound and carries out roasting and starting as heating layer between the narrow slit of anode and bottom land charcoal piece; The weight ratio of metallurgical coke and after-smithing petroleum coke is that 1.5-4 prepares burden in its compound, compound shop stove thickness 15-20 millimeter, and the preheating and baking time is 72-96 hour; The dismounting of splitter is: removed a component flow behind the energising 24h in every 4-6 hour, electric current increases progressively with ladder and enters roasting in the electrolyzer.
2. the method for a kind of roasting and starting blast groove type aluminum electrolysis bath according to claim 1 is characterized in that its metallurgical coke true density is greater than 2.15g.cm
-3, powder resistivity 2000-3000 μ Ω m, granularity 4-1mm.
3. the method for a kind of roasting and starting blast groove type aluminum electrolysis bath according to claim 1 is characterized in that it forges the burnt true density in back greater than 2.05g.cm
-3, powder resistivity 400-580 μ Ω m, granularity 4-1mm.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 200710118813 CN101058890A (en) | 2007-06-12 | 2007-06-12 | Method of roasting and starting blast groove type aluminum electrolysis bath |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 200710118813 CN101058890A (en) | 2007-06-12 | 2007-06-12 | Method of roasting and starting blast groove type aluminum electrolysis bath |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN101058890A true CN101058890A (en) | 2007-10-24 |
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Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN 200710118813 Pending CN101058890A (en) | 2007-06-12 | 2007-06-12 | Method of roasting and starting blast groove type aluminum electrolysis bath |
Country Status (1)
| Country | Link |
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| CN (1) | CN101058890A (en) |
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN101649469A (en) * | 2009-09-10 | 2010-02-17 | 河南中孚实业股份有限公司 | Double-layer scorched particle energy-saving roasting start method of aluminum electrolysis bath |
| CN101928959B (en) * | 2009-06-22 | 2012-02-15 | 中国铝业股份有限公司 | Electric heating roasting device and roasting method before starting aluminium cell |
-
2007
- 2007-06-12 CN CN 200710118813 patent/CN101058890A/en active Pending
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN101928959B (en) * | 2009-06-22 | 2012-02-15 | 中国铝业股份有限公司 | Electric heating roasting device and roasting method before starting aluminium cell |
| CN101649469A (en) * | 2009-09-10 | 2010-02-17 | 河南中孚实业股份有限公司 | Double-layer scorched particle energy-saving roasting start method of aluminum electrolysis bath |
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| PB01 | Publication | ||
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| C02 | Deemed withdrawal of patent application after publication (patent law 2001) | ||
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Open date: 20071024 |