CN103510114A - Special-shaped cathode electrolytic tank coke-paving method - Google Patents
Special-shaped cathode electrolytic tank coke-paving method Download PDFInfo
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- CN103510114A CN103510114A CN201310407284.1A CN201310407284A CN103510114A CN 103510114 A CN103510114 A CN 103510114A CN 201310407284 A CN201310407284 A CN 201310407284A CN 103510114 A CN103510114 A CN 103510114A
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Abstract
The invention belongs to the field of a special-shaped cathode aluminum electrolytic tank roasting starting technology, and especially relates to a special-shaped cathode electrolytic tank coke-paving method. During coke-paving, a special-shaped cathode recess is filled and flattened by using graphite with a particle size of 3-5mm; and a coke particle layer with a preset ratio is paved on the graphite layer. The special-shaped cathode electrolytic tank coke-paving method has the advantages of simple operation, low cost, and substantial energy-saving effect. With the method, an expected effect can be provided for roasting starting.
Description
Technical field
The invention belongs to specially-shaped cathode aluminum electrolytic tank roasting and starting technical field, particularly a kind of paving Jiao method of special-shaped cathode electrolytic cell.
Background technology
At present, what many large pre-baked cells adopted is all flat cathode electrolytic cell, its burnt grain proportioning and to spread the technology such as burnt method very ripe.But along with large quantities of introducings of special-shaped cathode electrolytic cell, due to the peculiar structure of specially-shaped cathode " boss ", be originally applicable to the burnt grain proportioning of flat cathode electrolytic cell, especially spread burnt method etc. no longer applicable, to production, brought new technical barrier.For the exploration that is applicable to the paving Jiao method of special-shaped cathode electrolytic cell, also become the study hotspot of this area.
Summary of the invention
A kind of paving Jiao method that the object of this invention is to provide special-shaped cathode electrolytic cell.
For solving the problems of the technologies described above, the technical solution used in the present invention is as follows:
A kind of paving Jiao method of special-shaped cathode electrolytic cell, when paving is burnt, specially-shaped cathode groove is filled and led up compacting with the graphite of 3-5mm granularity is broken, fills and leads up rear upper strata and elaborates good burnt of proportioning; In the good burnt grain of described proportioning, burnt grain A: burnt grain B: burnt grain C: the mass ratio of the broken D of graphite is 9:6:5:4, the granularity of burnt grain A is 0.5-1mm, the granularity of burnt grain B is 1-2mm, the granularity of burnt grain C is 2-3mm, the granularity of the broken D of graphite is 2-3mm, and the granularity of burnt grain A, B, C and the broken D of graphite is not identical.
Graphite that groove is filled is broken and the mass ratio of the burnt grain that proportioning is good is 2.5-3.5:1, and the broken consumption of graphite increases and decreases because of the difference of boss height, and height is not at 110-150 mm etc.
Specially-shaped cathode groove is filled and led up proportioning good burnt grain thickness 25mm in upper strata after compacting.Object is to increase degree of compactness, is beneficial to conduction.
Before burnt grain and the broken use of graphite, carry out the heating, drying of 8-10 hour, bake out temperature is not less than 100 ℃.
Tool of the present invention has the following advantages:
1. the calcination time shortened to 84 hours by original 96 hours, the separate unit electrolyzer about 10000KWh that economizes on electricity, and energy-saving effect is remarkable.
2. during being conducive to roasting, anode rod distribution of current uniformity coefficient is controlled, and during roasting, Current distribution in anode, between 5-10mv, has been stopped to occur because of the de-pawl phenomenon that Current distribution in anode inequality causes.
3. be conducive to the control of burner hearth temperature gradient and uniformity coefficient during roasting, temperature gradient is no more than 15 ℃/h, burner hearth top temperature 950-1000 ℃, minimum temperature 500-550 ℃, temperature rise is even, little to the thermal shocking of burner hearth, avoids the infant cracking of cell lining damaged, be conducive to extend bath life, energy-saving effect is remarkable.
4. start front furnace medial temperature 700-750 ℃, fire box temperature is even, roasting effect is good, the negative electrode boss having caused because medial temperature is too high before having avoided come off and starts after the phenomenon of steel plate of furnace hearth temperature over 120 ℃, be conducive to the raising of economic and technical norms in the steady running of electrolyzer and final-period management.
Compared with prior art, tool has the following advantages in the present invention:
The present invention is directed to the distinctive cathode construction of special-shaped cathode electrolytic cell, adopt new burnt grain proportioning and the burnt method of paving, guarantee electrolyzer paving Jiao and roasting effect.Method is simple to operate, and input cost is low, and distribution of current during roasting, fire box temperature are even, reach desired temperature and effect before startup, and after starting, electrolyzer all technical and technical parameter are normal.The inventive method is applicable to all special-shaped cathode electrolytic cells, has very wide promotional value and practicality.
Embodiment
With specific embodiment, technical scheme of the present invention is described below, but protection scope of the present invention is not limited to this:
A kind of paving Jiao method of special-shaped cathode electrolytic cell, first carry out the proportioning of burnt grain: burnt grain A: burnt grain B: burnt grain C: the mass ratio of the broken D of graphite is 9:6:5:4, gross weight 750Kg, the granularity of burnt grain A is 0.5-1mm, the granularity of burnt grain B is 1-2mm, the granularity of burnt grain C is 2-3mm, and the granularity of the broken D of graphite is 2-3mm, and the granularity of burnt grain A, B, C and the broken D of graphite is not identical.Join the defocused broken heating, drying that carries out 8 hours of graphite that is 3-5mm together with granularity, temperature is not less than 100 ℃.
Spread burnt: specially-shaped cathode groove is filled and led up to compacting with the graphite of 3-5mm granularity is broken, while filling and leading up, first at groove, pour graphite into broken, higher than boss 20mm centimetre, with anode, flatten and tamp.Exceed projection section and wipe taking-up off with horizon bar, guarantee that upper surface is smooth.The burnt grain that proportioning is good is elaborated on upper strata, and thickness is 25mm.
Claims (4)
1. the paving Jiao method of a special-shaped cathode electrolytic cell, is characterized in that, when paving is burnt, specially-shaped cathode groove is filled and led up compacting with the graphite of 3-5 mm granularity is broken, fills and leads up rear upper strata and elaborates good burnt of proportioning; In the good burnt grain of described proportioning, burnt grain A: burnt grain B: burnt grain C: the mass ratio of the broken D of graphite is 9:6:5:4, the granularity of burnt grain A is 0.5-1mm, the granularity of burnt grain B is 1-2mm, the granularity of burnt grain C is 2-3mm, the granularity of the broken D of graphite is 2-3mm, and the granularity of burnt grain A, B, C and the broken D of graphite is not identical.
2. the paving Jiao method of special-shaped cathode electrolytic cell as claimed in claim 1, is characterized in that, the graphite mass ratio broken and the burnt grain that proportioning is good that groove is filled is 2.5-3.5:1.
3. the paving Jiao method of special-shaped cathode electrolytic cell as claimed in claim 1, is characterized in that, specially-shaped cathode groove is filled and led up proportioning good burnt grain thickness 25mm in upper strata after compacting.
4. the paving Jiao method of the special-shaped cathode electrolytic cell as described in as arbitrary in claim 1-3, is characterized in that, carries out the heating, drying of 8-10 hour before burnt grain and the broken use of graphite, and bake out temperature is not less than 100 ℃.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201310407284.1A CN103510114A (en) | 2013-09-10 | 2013-09-10 | Special-shaped cathode electrolytic tank coke-paving method |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201310407284.1A CN103510114A (en) | 2013-09-10 | 2013-09-10 | Special-shaped cathode electrolytic tank coke-paving method |
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| CN103510114A true CN103510114A (en) | 2014-01-15 |
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| CN201310407284.1A Pending CN103510114A (en) | 2013-09-10 | 2013-09-10 | Special-shaped cathode electrolytic tank coke-paving method |
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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN104451774A (en) * | 2014-12-29 | 2015-03-25 | 云南铝业股份有限公司 | Zero allowance cell shutting polymorph high roasting method |
Citations (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN101660175A (en) * | 2009-07-21 | 2010-03-03 | 兖矿集团有限公司 | Method for roasting and starting aluminum electrolytic cell |
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2013
- 2013-09-10 CN CN201310407284.1A patent/CN103510114A/en active Pending
Patent Citations (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN101660175A (en) * | 2009-07-21 | 2010-03-03 | 兖矿集团有限公司 | Method for roasting and starting aluminum electrolytic cell |
Non-Patent Citations (2)
| Title |
|---|
| 梁学民: "《现代铝电解生产技术与管理》", 1 November 2011, 中南大学出版社 * |
| 王雄: "降低铝电解槽焦粒焙烧冲击电压的实验研究", 《中国有色冶金》 * |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN104451774A (en) * | 2014-12-29 | 2015-03-25 | 云南铝业股份有限公司 | Zero allowance cell shutting polymorph high roasting method |
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Application publication date: 20140115 |