CN103374730A - Wettable cathode cylinder with crystal graphite as plastid and production method thereof - Google Patents
Wettable cathode cylinder with crystal graphite as plastid and production method thereof Download PDFInfo
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- CN103374730A CN103374730A CN2012101285343A CN201210128534A CN103374730A CN 103374730 A CN103374730 A CN 103374730A CN 2012101285343 A CN2012101285343 A CN 2012101285343A CN 201210128534 A CN201210128534 A CN 201210128534A CN 103374730 A CN103374730 A CN 103374730A
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- Prior art keywords
- graphite
- wettable
- negative electrode
- production method
- plastid
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- OKTJSMMVPCPJKN-UHFFFAOYSA-N Carbon Chemical compound [C] OKTJSMMVPCPJKN-UHFFFAOYSA-N 0.000 title claims abstract description 53
- 239000010439 graphite Substances 0.000 title claims abstract description 43
- 229910002804 graphite Inorganic materials 0.000 title claims abstract description 43
- 238000004519 manufacturing process Methods 0.000 title claims abstract description 17
- 210000002706 plastid Anatomy 0.000 title claims abstract description 15
- 239000013078 crystal Substances 0.000 title abstract 3
- 239000011159 matrix material Substances 0.000 claims abstract description 13
- QYEXBYZXHDUPRC-UHFFFAOYSA-N B#[Ti]#B Chemical compound B#[Ti]#B QYEXBYZXHDUPRC-UHFFFAOYSA-N 0.000 claims description 10
- 229910033181 TiB2 Inorganic materials 0.000 claims description 10
- 239000003610 charcoal Substances 0.000 claims description 8
- 239000011230 binding agent Substances 0.000 claims description 7
- 239000003575 carbonaceous material Substances 0.000 claims description 7
- 238000000465 moulding Methods 0.000 claims description 7
- 239000000463 material Substances 0.000 claims description 6
- 239000002562 thickening agent Substances 0.000 claims description 6
- 239000011280 coal tar Substances 0.000 claims description 3
- 239000011294 coal tar pitch Substances 0.000 claims description 3
- 238000005056 compaction Methods 0.000 claims description 3
- 239000002131 composite material Substances 0.000 claims description 3
- 239000000758 substrate Substances 0.000 claims description 3
- 239000010426 asphalt Substances 0.000 claims 2
- 229910052799 carbon Inorganic materials 0.000 abstract description 10
- 229910052782 aluminium Inorganic materials 0.000 description 13
- 239000004411 aluminium Substances 0.000 description 11
- 238000000034 method Methods 0.000 description 11
- 210000004027 cell Anatomy 0.000 description 8
- VNWKTOKETHGBQD-UHFFFAOYSA-N methane Chemical compound C VNWKTOKETHGBQD-UHFFFAOYSA-N 0.000 description 8
- AZDRQVAHHNSJOQ-UHFFFAOYSA-N alumane Chemical compound [AlH3] AZDRQVAHHNSJOQ-UHFFFAOYSA-N 0.000 description 6
- XAGFODPZIPBFFR-UHFFFAOYSA-N aluminium Chemical compound [Al] XAGFODPZIPBFFR-UHFFFAOYSA-N 0.000 description 6
- 239000007788 liquid Substances 0.000 description 6
- 238000010438 heat treatment Methods 0.000 description 5
- 238000004898 kneading Methods 0.000 description 5
- 238000006243 chemical reaction Methods 0.000 description 3
- 239000011295 pitch Substances 0.000 description 3
- 239000010406 cathode material Substances 0.000 description 2
- 238000011109 contamination Methods 0.000 description 2
- 230000000694 effects Effects 0.000 description 2
- 239000003792 electrolyte Substances 0.000 description 2
- 239000012535 impurity Substances 0.000 description 2
- 239000000155 melt Substances 0.000 description 2
- 238000007750 plasma spraying Methods 0.000 description 2
- 238000003756 stirring Methods 0.000 description 2
- 239000011449 brick Substances 0.000 description 1
- 238000001354 calcination Methods 0.000 description 1
- 150000001875 compounds Chemical class 0.000 description 1
- 239000002826 coolant Substances 0.000 description 1
- 238000005260 corrosion Methods 0.000 description 1
- 230000007797 corrosion Effects 0.000 description 1
- 230000007812 deficiency Effects 0.000 description 1
- 239000000428 dust Substances 0.000 description 1
- 238000005868 electrolysis reaction Methods 0.000 description 1
- 238000005516 engineering process Methods 0.000 description 1
- 238000013467 fragmentation Methods 0.000 description 1
- 238000006062 fragmentation reaction Methods 0.000 description 1
- 238000000227 grinding Methods 0.000 description 1
- 239000000203 mixture Substances 0.000 description 1
- 238000005498 polishing Methods 0.000 description 1
- 238000009991 scouring Methods 0.000 description 1
- 238000012216 screening Methods 0.000 description 1
- 230000007704 transition Effects 0.000 description 1
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 description 1
- 230000003245 working effect Effects 0.000 description 1
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- Electrolytic Production Of Metals (AREA)
Abstract
The invention relates to a wettable cathode cylinder with crystal graphite as plastid and a production method thereof. The cathode cylinder is a graphite cathode cylinder of crystal graphite. In the production process, the graphite content in matrix aggregate is 55%. The graphite content in the matrix of an integrally formed wettable cathode carbon block is larger than 60%, and the resistivity is low, thereby being capable of meeting the increasingly large scale demand of electrolytic tanks.
Description
Technical field
A kind of plastid is wettable negative electrode cylinder and the production method thereof of Scaly graphite, and relating to a kind of aluminum electrolyzing cell used matrix is Scaly graphite matter carbon block of cathode capable of being humidified and production method thereof.
Background technology
The used inner lining material of traditional aluminium cell is carbonaceous material, the carbon lining material is built the innermost layer at aluminium cell by laying bricks or stones, form the reaction molten bath of Aluminium Electrolysis by it, it directly contacts with high-temperature fusant, working temperature is 930～970 ℃, be up to 1000～1050 ℃, and participate in conduction and chemical reaction directly, its character and quality directly affect technico-economical comparison and the practical life of aluminium cell.Electric tank cathode charcoal piece is the important component part of carbon lining material, participates in electrolytic reaction directly, at its Surface Creation aluminium liquid.An aluminium cell, the consumption of cathode carbon pieces is about 70～75% of cathode portion gross weight, and its area is about 3/4ths of whole bottom land area.Therefore, no matter be effect or need quantity that cathode carbon pieces has very important effect on aluminum electrolyzing cell used inner lining material.
The cathode carbon pieces of aluminium cell practicality had once been gone through the qualitative charcoal piece of having no way of, semi-graphite charcoal piece, Graphitized carbon blocks, wettable cathode modulation and had repeatedly been improved and transition, owing to form and with different its performance and use propertieies in electrolyzer that cause of process system very big-difference arranged, unformed, semi-graphite charcoal piece conductive capability and shaking property of heat resistanceheat resistant are relatively poor, and Graphitized carbon blocks potential resistance to electrolyte contamination polishing machine is relatively poor.In recent years, the Cultivar development of cathode material was very fast, and the high graphite cathode carbon pieces that content of graphite is higher begins progressively to adopt, and can greatly reduce electric tank cathode resistance, saved power consumption.The cathode material that contains TiB2 has preferably wettability to aluminium liquid, can have preferably corrosion resistance nature to ionogen, is called as wettable negative electrode.But because TiB2 is very expensive, generally only be used in the cathode carbon pieces top layer.The combining method of TiB2 layer and cathode carbon pieces has streak method, plasma spraying method and integrated molding method.Streak method and plasma spraying method are combined with charcoal piece matrix and are not bery firm, and cost is high, is easy to be washed away by ionogen at the electrobath start initial stage.The integrated molding method is when the cathode carbon pieces moulding, suppresses the thickener that one deck contains TiB2 on its surface, obtains carbon block of cathode capable of being humidified.
But the matrix of present integrated molding carbon block of cathode capable of being humidified is conventional cathode charcoal piece or schungite cathode carbon pieces, content of graphite is no more than 30% in the matrix, resistivity is high, can not satisfy the demand that electrolyzer maximizes day by day, not having at present plastid is the wettable cathode technique of Scaly graphite negative electrode cylinder.
Summary of the invention
The objective of the invention is the deficiency for above-mentioned prior art, provide a kind of can improve negative electrode cylinder and aluminium liquid wet performance, can strengthen that negative electrode cylinder potential resistance to electrolyte contamination corrodes and wettable negative electrode cylinder anti-aluminium liquid scouring capability, that can improve negative electrode cylinder conductivity, this kind negative electrode cylinder can effectively improve the electrolyzer operating index, is wettable negative electrode cylinder and the production method thereof of high graphite thereby finally reach the matrix that prolongs aluminium cell work-ing life.
Method of the present invention by and technical scheme realize.
A kind of plastid is the wettable negative electrode cylinder of Scaly graphite, it is characterized in that the negative electrode cylinder is the graphite cathode cylinder of Scaly graphite.
A kind of plastid of the present invention is wettable negative electrode cylinder and the production method thereof of Scaly graphite, it is characterized in that the content of graphite in the substrate aggregate is 55%.
A kind of plastid of the present invention is wettable negative electrode cylinder and the production method thereof of Scaly graphite, when it is characterized in that vibratory compaction, integrated molding one deck contains TiB2, carbonaceous material, binding agent composition on the cylinder matrix of Scaly graphite: its proportioning TiB2 is 25%, carbonaceous material 55%, binding agent 20%, carbonaceous material is Graphite Powder 99, and binding agent is coal-tar pitch.
Content of graphite surpasses 30% in the wettable negative electrode cylinder of integrated molding of the present invention, and resistivity is low, can satisfy the needs that electrolyzer maximizes day by day.
Embodiment
A kind of plastid is the wettable negative electrode cylinder of Scaly graphite, it is characterized in that the graphite cathode cylinder that its negative electrode cylinder is Scaly graphite; Content of graphite during production in its substrate aggregate is 30%～100%.
Embodiment:
1, the material proportion of Scaly graphite cylinder and wettable composite bed is seen the proportioning example table.
2, production process:
At first TiB2 and carbonaceous material are joined can the container of automatic temperature control heating in, utilize agitator to mix.Pitch melts in heating tank, removes moisture and precipitated impurities, allocates coal tar into.The container stirring kneading that liquid-containing binder adds the temperature control heating is even.Siccative mixes in the kneading pot, and kneading temperature is not less than 170 ℃; Add in proportion the pitch for preparing, kneading is even; Dry in the air and expected 3～5 minutes, be incubated for subsequent use.
Scaly graphite matter matrix, practical various aggregate in proportion, fragmentation, screening, abrasive dust, batching.Pitch melts in heating tank, removes moisture and precipitated impurities, allocates coal tar into.The container stirring kneading that liquid-containing binder adds the temperature control heating is even, obtains carbon matrix piece thickener.
The matrix thickener adds in the grinding tool, falls the weight precompressed, then mentions weight, and is with target that thickener is surperficial hair; The charcoal piece thickener of the wettable cathode layer of uniform spreading last layer adequate thickness falls weight, routinely technique vibratory compaction.Putting into water coolant cools off; Green compact were packed in the ring-form calcining furnace roasting 7-8 days, and compound aspect is not processed, and its lap carries out finished product processing according to product specification.
Claims (6)
1. wettable negative electrode cylinder and the production method thereof that plastid is Scaly graphite is characterized in that: the graphite cathode cylinder that its negative electrode cylinder is Scaly graphite.
2. plastid according to claim 1 is the production method of the wettable negative electrode cylinder of Scaly graphite, it is characterized in that: the content of graphite in its substrate aggregate is 75%.
3. plastid according to claim 2 is wettable negative electrode cylinder and the production method thereof of Scaly graphite, it is characterized in that: the graphite in the aggregate is natural Scaly graphite, and all the other materials are modifying asphalt.
4. plastid according to claim 2 is wettable negative electrode cylinder and the production method thereof of Scaly graphite, it is characterized in that: during vibratory compaction, one deck of integrated molding contains the wettable composite bed of TiB2 on the charcoal piece matrix of high graphite.
5. plastid according to claim 2 is wettable negative electrode cylinder and the production method thereof of Scaly graphite, it is characterized in that: the cylinder matrix is a kind of of coal-tar pitch, coal tar or its cooperation.
6. plastid according to claim 2 is wettable negative electrode cylinder and the production method thereof of Scaly graphite, it is characterized in that: be comprised of TiB2, carbonaceous material, binding agent in the thickener of its wettable cathode composite layer: its proportioning TiB2 is 25%, Scaly graphite 55%, modifying asphalt 20%; Carbonaceous material is that Graphite Powder 99, binding agent are coal-tar pitch.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN2012101285343A CN103374730A (en) | 2012-04-28 | 2012-04-28 | Wettable cathode cylinder with crystal graphite as plastid and production method thereof |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN2012101285343A CN103374730A (en) | 2012-04-28 | 2012-04-28 | Wettable cathode cylinder with crystal graphite as plastid and production method thereof |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN103374730A true CN103374730A (en) | 2013-10-30 |
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Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN2012101285343A Pending CN103374730A (en) | 2012-04-28 | 2012-04-28 | Wettable cathode cylinder with crystal graphite as plastid and production method thereof |
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| CN (1) | CN103374730A (en) |
Citations (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN1043964A (en) * | 1989-01-04 | 1990-07-18 | 东北工学院 | Natural graphite cathode carbon pieces and manufacture method thereof |
| CN1055016A (en) * | 1991-02-09 | 1991-10-02 | 中国有色金属工业总公司山西碳素厂 | Method for manufacturing cathode carbon block for aluminum electrolysis cell |
| JPH06305831A (en) * | 1993-04-22 | 1994-11-01 | Mitsubishi Kasei Corp | Production of carbon fiber-reinforced carbon composite material |
| CN101165217A (en) * | 2007-08-08 | 2008-04-23 | 中国铝业股份有限公司 | Humid cathode carbon block with high graphite basal body and producing method thereof |
| CN101255568A (en) * | 2007-12-07 | 2008-09-03 | 中南大学 | Particle gradation functional gradient TiB2/C composite cathode for aluminium electrolysis and preparation method thereof |
-
2012
- 2012-04-28 CN CN2012101285343A patent/CN103374730A/en active Pending
Patent Citations (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN1043964A (en) * | 1989-01-04 | 1990-07-18 | 东北工学院 | Natural graphite cathode carbon pieces and manufacture method thereof |
| CN1055016A (en) * | 1991-02-09 | 1991-10-02 | 中国有色金属工业总公司山西碳素厂 | Method for manufacturing cathode carbon block for aluminum electrolysis cell |
| JPH06305831A (en) * | 1993-04-22 | 1994-11-01 | Mitsubishi Kasei Corp | Production of carbon fiber-reinforced carbon composite material |
| CN101165217A (en) * | 2007-08-08 | 2008-04-23 | 中国铝业股份有限公司 | Humid cathode carbon block with high graphite basal body and producing method thereof |
| CN101255568A (en) * | 2007-12-07 | 2008-09-03 | 中南大学 | Particle gradation functional gradient TiB2/C composite cathode for aluminium electrolysis and preparation method thereof |
Non-Patent Citations (1)
| Title |
|---|
| 有色冶金系统设计院联合编写组编: "《有色冶金矿山设计地质工作参考资料》", 30 April 1984, 有色冶金系统设计院 * |
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Effective date of registration: 20160531 Address after: 321200 Zhejiang province Wuyi County Hushan Street No. 44 Applicant after: Xia Lihong Address before: 321200 Zhejiang province Wuyi County Hushan Street No. 44 Applicant before: Xia Huasong |
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Application publication date: 20131030 |