CN103084538B - A kind of method of sticking with paste at anode steel claw surface spraying graphite - Google Patents
A kind of method of sticking with paste at anode steel claw surface spraying graphite Download PDFInfo
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- CN103084538B CN103084538B CN201110335707.4A CN201110335707A CN103084538B CN 103084538 B CN103084538 B CN 103084538B CN 201110335707 A CN201110335707 A CN 201110335707A CN 103084538 B CN103084538 B CN 103084538B
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Abstract
The invention discloses a kind of method of sticking with paste at anode steel claw surface spraying graphite, method is for being evenly mixed into kerosene and graphite after graphite paste, adopt the compressed air of 0.3～0.6 MPa as carrier, the mixture of kerosene and graphite is sprayed into anode steel claw surface by spraycan, wherein, graphite accounts for graphite and sticks with paste the 5-35% of gross weight. The spraying method that the graphite that the embodiment of the present invention provides is stuck with paste can not only make the graphite paste in spraying evenly be adjacent to, difficult drop-off, and greatly reduce the content of graphite in graphite paste, cost-saving.
Description
Technical field
The present invention relates to aluminum electrolyzing cell used prebaked anode package technique field, relate in particular to a kind of method of sticking with paste at anode steel claw surface spraying graphite.
Background technology
When the inherent assembling of aluminium electroloysis industry charcoal element prebaked anode, in order to prevent that phosphorus molten pig iron from rushing steel pawl when the casting and iron hoop clings steel pawl, general first at anode steel claw head graphite powder then the phosphorus molten pig iron of casting. Concrete technology is: A, graphite powder are put into kerosene or diesel oil furnishing pasty state, and the ratio that graphite accounts for graphite paste is generally 25%～40%; B, brush on steel pawl head with brush, or directly steel pawl head is stained with in graphite is stuck with paste; C, dry graphite linings with natural gas or electrical heating. There is following problem in this technique and proportioning:
The bonding force of this technique graphite on steel pawl head is not strong, thereby in the time of assembling casting, because steel pawl is subject to washing away of phosphorus molten pig iron, part graphite is from departing from from anode steel claw head, float over phosphorus molten pig iron surface, even in the middle of phosphorus molten pig iron, solidify and increase phosphorus pig iron self-resistance, fall hematite iron intensity. Even if this formula Design person has considered this problem, thereby the ratio that makes graphite account for graphite paste is increased to 25%～40% to meet Production requirement, still, has equally also wasted wherein about 20% graphite.
Summary of the invention
The embodiment of the present invention provides a kind of method of sticking with paste at anode steel claw surface spraying graphite, can not only make the graphite paste in spraying evenly be adjacent to, difficult drop-off, and greatly reduce the content of graphite in graphite paste, cost-saving.
For achieving the above object, the embodiment of the present invention provides following technical scheme:
A method of sticking with paste at anode steel claw surface spraying graphite, comprises step:
A, kerosene and graphite are evenly mixed into graphite stick with paste, described graphite accounts for described graphite and sticks with paste the 5-35% of gross weight;
The compressed air of B, employing 0.3～0.6 MPa, as carrier, is stuck with paste described graphite to be sprayed into anode steel claw surface by spraycan.
Preferably, step B continues 2-7s.
Preferably, described graphite granule diameter is between 25-80 μ m.
Preferably, spraying rate is 25-50L/min.
Preferably, single coating thickness is 0.1-0.8mm.
Preferably, described spraycan is spray gun or pulp shooting machine.
Preferably, described graphite accounts for described graphite and sticks with paste the 10-15% of quality.
Preferably, described step B spraying scope is: steel pawl bottom is above 100mm At The Height to bottom.
Preferably, repeating step B2-4 time, every minor tick 2-5s.
Compared with prior art, the present invention has following beneficial effect:
1, efficiency is high: a, prior art process an anode joint and approximately need 60-70s, and the embodiment of the present invention can adopt many shower nozzles to spray, and without oven dry, and processing an anode joint only needed about 2-7 second; B, the employing embodiment of the present invention, casting only needs just can complete for 1 time, and prior art needs 2 times. The embodiment of the present invention 4 groups of raising per hour casting efficiency compared to existing technology, reduce phosphorus pig iron ring teeming frequency, enhance productivity; C, without oven dry: the coating of spraycan is fine and smooth thinly easily to be done, and solvent kerosene is volatile, natural drying after spraying, without extra baking operation;
2, improving quality of anode: a, graphite sticks with paste and is close to steel pawl: the present invention adopt spraycan by short grained graphite coating to anode steel claw surface, the impulsive force that compressed air gives enough makes graphite be fitted in steel pawl surface, and the coverage rate of spraycan is even, can not impact the casting of phosphorus molten pig iron; B, improve phosphorus pig iron intensity: adopt the embodiment of the present invention, the phosphorus pig iron ring lamination of having avoided 2 casting to cause, has also avoided the generation of the loosening phenomenon of phosphorus pig iron ring simultaneously, iron-carbon pressure is fallen and reduce 10mv;
3, economize in raw materials: because taking spraycan spraying method, graphite laminating tightly can not depart from the time of the casting phosphorus pig iron, and in the graphite paste therefore adopting, graphite only accounts for graphite and sticks with paste the 5-20% of quality, compared to existing technology, graphite consumption is reduced by more than 50;
4, improve working environment: take spraycan spraying method, kerosene consumption is used 3～4 times than prior art is few, when casting, there is no flame and obvious black smoke.
Detailed description of the invention
To the technical scheme in the embodiment of the present invention be clearly and completely described below, obviously, described embodiment is only the present invention's part embodiment, instead of whole embodiment. Based on the embodiment in the present invention, those of ordinary skill in the art, not making the every other embodiment obtaining under creative work prerequisite, belong to the scope of protection of the invention.
The embodiment of the present invention by adopt spraycan by short grained graphite coating to anode steel claw surface, the impulsive force that compressed air gives enough makes graphite be fitted in steel pawl surface to be difficult for departing from, more than in therefore graphite can being stuck with paste, graphite mass ratio is reduced to 5-20%; And coating is thin easily dry, and solvent kerosene is volatile, natural drying after spraying, without oven dry, improves spray efficiency. It is below specific embodiment.
Embodiment mono-,
A method of sticking with paste at anode steel claw surface spraying graphite, comprises step:
A, kerosene and graphite are evenly mixed into graphite stick with paste, described graphite accounts for described graphite and sticks with paste the 5-35% of gross weight;
Evenly mixing can be taked mechanical agitation, pass into the modes such as flowing gas, because solvent ratios in graphite paste is larger, after fully mixing, can make graphite granule refinement as much as possible, dispersion, strengthens spraying uniformity.
Graphite of the prior art accounts for graphite and sticks with paste the 25-40% of quality, is that laminating does not closely easily come off, and has wasted large content of starting materials because brushing or dip to steel pawl surface muddled graphite; In fact, being deposited in steel pawl surface plays the graphite of real protection, lubrication and only has 5-35%.
And the embodiment of the present invention sprays after adopting compressed air and spraycan that graphite is stuck with paste to atomization, spray efficiency Gao Yigan, graphite is adjacent to steel pawl surface fast, and raw material availability is high, and therefore, in the graphite paste raw material of employing, content of graphite can only account for 5-35%.
Preferably, graphite granule diameter between 25-80 μ m, particle nonchoking nozzle, spraying effect is better.
The compressed air of B, employing 0.3～0.6 MPa, as carrier, is sprayed into anode steel claw surface by the mixture of kerosene and graphite by spraycan.
The compressed air of 0.3～0.6 MPa, as carrier, is transported to the mixture of kerosene and graphite on steel pawl head, has increased the impulsive force of graphite and steel pawl, thereby graphite is more easily sticked on steel pawl head. Utilize compressed-air actuated air-flow, the nozzle bore that flows through spraycan forms negative pressure, and negative pressure is stuck with paste from suction pipe suction graphite, through nozzle ejection, forms spraying, is covered to anode steel claw surface. Nozzle distance anode steel claw surface 20-50cm is advisable, and has both ensured spray area, ensures again injection dynamics. The sustainable 2-7s of step B, keeps spraying effect.
In addition, the mixture of kerosene and graphite can be anode steel claw surface spraying 2-4 time by spraycan. Every minor tick 2-5, until last time coating dripless after sliding, be coated with again the second layer.
Spraying rate is 25-50L/min. The lower atomization graphite paste speed of service can be improved graphite paste and rebound out from anode steel claw surface, and contamination of raw material environment avoids waste.
When single coating thickness is 0.1-0.8mm, can meet Production requirement, phosphorus molten pig iron and steel pawl can be kept apart, again can be not blocked up and occupy spatial volume in too much charcoal bowl, and then affect thickness and the intensity of phosphorus pig iron ring.
The scope of step B spraying is: steel pawl bottom is above 100mm At The Height to bottom, and the part that can cover phosphorus molten pig iron and may touch steel pawl, thoroughly keeps apart phosphorus pig iron ring and steel pawl.
Embodiment bis-,
A, kerosene and graphite are evenly mixed into graphite stick with paste; Graphite and kerosene mass ratio are 1: 9, and graphite accounts for described graphite and sticks with paste 10% of quality.
B, adopt the compressed air of 0.3 MPa as carrier, the mixture of kerosene and graphite is passed through to spray gun spraying 2 times to anode steel claw surface, interval 20s between twice. Spraying rate is 50L/min, and coating thickness is 0.3mm.
Leave standstill after 5min, this steel pawl is placed in to anode carbon bowl, then at gap casting phosphorus molten pig iron. In casting cycle, do not find graphite dropping situations. Cast after a phosphorus molten pig iron, steel pawl is fixed; In aluminium cell life cycle, there is not the loosening phenomenon of phosphorus pig iron ring in this anode, iron-carbon pressure falls and reduces 10mv.
In the process of leaving standstill, can dry to consolidate spraying effect to graphite linings; But do not dry the realization that does not yet affect the present embodiment. Following examples can be dried acceleration equally, repeat no more.
Embodiment tri-,
A, kerosene and graphite are evenly mixed into graphite stick with paste; Graphite and kerosene mass ratio are 1: 19, and graphite accounts for described graphite and sticks with paste 5% of quality.
B, adopt the compressed air of 0.4 MPa as carrier, by the mixture of kerosene and graphite by spray gun spraying 4 times to anode steel claw surface, at every turn between interval 20s. Spraying rate is 450L/min, and coating thickness is 0.8mm.
Leave standstill after 10min, this steel pawl is placed in to anode carbon bowl, then at gap casting phosphorus molten pig iron. In casting cycle, do not find graphite dropping situations. Cast after a phosphorus molten pig iron, steel pawl is fixed; In aluminium cell life cycle, there is not the loosening phenomenon of phosphorus pig iron ring in this anode, iron-carbon pressure falls and reduces 9mv.
Embodiment tetra-,
A, kerosene is evenly mixed with graphite; Graphite and kerosene mass ratio are 1: 4, and graphite accounts for described graphite and sticks with paste 20% of quality.
B, adopt the compressed air of 0.6 MPa as carrier, the mixture of kerosene and graphite sprayed to 3 times to anode steel claw surface by pulp shooting machine, at every turn between interval 20s. Spraying rate is 40L/min, and coating thickness is 0.5mm.
Leave standstill after 10min, this steel pawl is placed in to anode carbon bowl, then at gap casting phosphorus molten pig iron. In casting cycle, do not find graphite dropping situations. Cast after a phosphorus molten pig iron, steel pawl is fixed; In aluminium cell life cycle, there is not the loosening phenomenon of phosphorus pig iron ring in this anode, iron-carbon pressure falls and reduces 9mv.
Embodiment five,
A, kerosene and graphite are evenly mixed into graphite stick with paste; Graphite and kerosene mass ratio are 3: 17, and graphite accounts for described graphite and sticks with paste 15% of quality.
The compressed air of B, employing 0.5 MPa is as carrier, and spraying rate is 25L/min, and coating thickness is 0.2mm.
Leave standstill after 8min, this steel pawl is placed in to anode carbon bowl, then at gap casting phosphorus molten pig iron. In casting cycle, do not find graphite dropping situations. Cast after a phosphorus molten pig iron, steel pawl is fixed; In aluminium cell life cycle, there is not the loosening phenomenon of phosphorus pig iron ring in this anode, iron-carbon pressure falls and reduces 10mv.
Embodiment six,
A, kerosene and graphite are evenly mixed into graphite stick with paste; Graphite and kerosene mass ratio are 1: 3, and graphite accounts for described graphite and sticks with paste 25% of quality.
The compressed air of B, employing 0.6 MPa is as carrier, and spraying rate is 35L/min, and coating thickness is 0.1mm.
Leave standstill after 6min, this steel pawl is placed in to anode carbon bowl, then at gap casting phosphorus molten pig iron. In casting cycle, do not find graphite dropping situations. Cast after a phosphorus molten pig iron, steel pawl is fixed; In aluminium cell life cycle, there is not the loosening phenomenon of phosphorus pig iron ring in this anode, iron-carbon pressure falls and reduces 9mv.
Embodiment seven,
A, kerosene and graphite are evenly mixed into graphite stick with paste; Graphite and kerosene mass ratio are 3: 7, and graphite accounts for described graphite and sticks with paste 30% of quality.
The compressed air of B, employing 0.4 MPa is as carrier, and spraying rate is 30L/min, and coating thickness is 0.3mm.
Leave standstill after 6min, this steel pawl is placed in to anode carbon bowl, then at gap casting phosphorus molten pig iron. In casting cycle, do not find graphite dropping situations. Cast after a phosphorus molten pig iron, steel pawl is fixed; In aluminium cell life cycle, there is not the loosening phenomenon of phosphorus pig iron ring in this anode, iron-carbon pressure falls and reduces 10mv.
Embodiment eight,
A, kerosene and graphite are evenly mixed into graphite stick with paste; Graphite and kerosene mass ratio are 7: 13, and graphite accounts for described graphite and sticks with paste 35% of quality.
The compressed air of B, employing 0.4 MPa is as carrier, and spraying rate is 45L/min, and coating thickness is 0.15mm.
Leave standstill after 6min, this steel pawl is placed in to anode carbon bowl, then at gap casting phosphorus molten pig iron. In casting cycle, do not find graphite dropping situations. Cast after a phosphorus molten pig iron, steel pawl is fixed; In aluminium cell life cycle, there is not the loosening phenomenon of phosphorus pig iron ring in this anode, iron-carbon pressure falls and reduces 10mv.
A kind of method of sticking with paste at anode steel claw surface spraying the graphite above embodiment of the present invention being provided is described in detail, applied specific case herein principle of the present invention and embodiment are set forth, the explanation of above embodiment is just for helping to understand method of the present invention and core concept thereof; , for one of ordinary skill in the art, according to thought of the present invention, all will change in specific embodiments and applications, in summary, this description should not be construed as limitation of the present invention meanwhile.
Claims (3)
1. a method of sticking with paste at anode steel claw surface spraying graphite, is characterized in that, comprises step:
A, kerosene and graphite are evenly mixed into graphite stick with paste, described graphite accounts for described graphite and sticks with paste the 5-35% of gross weight;
The compressed air of B, employing 0.3～0.6 MPa, as carrier, is stuck with paste described graphite to be sprayed into anode steel claw surface by spraycan; Step B continues 2-7s; Described graphite granule diameter is between 25-80 μ m; Spraying rate is 25-50L/min; Single coating thickness is 0.1-0.8mm.
2. a kind of method of sticking with paste at anode steel claw surface spraying graphite according to claim 1, is characterized in that, described spraycan is spray gun or pulp shooting machine.
3. according to a kind of method of sticking with paste at anode steel claw surface spraying graphite described in claim 1 to 2 any one, it is characterized in that, described graphite accounts for described graphite and sticks with paste the 10-15% of quality; Described step B spraying scope is: steel pawl bottom is above 100mm At The Height to bottom; Repeating step B2-4 time, every minor tick 2-5s.
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201110335707.4A CN103084538B (en) | 2011-10-30 | 2011-10-30 | A kind of method of sticking with paste at anode steel claw surface spraying graphite |
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| Application Number | Priority Date | Filing Date | Title |
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| CN201110335707.4A CN103084538B (en) | 2011-10-30 | 2011-10-30 | A kind of method of sticking with paste at anode steel claw surface spraying graphite |
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| Publication Number | Publication Date |
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| CN103084538A CN103084538A (en) | 2013-05-08 |
| CN103084538B true CN103084538B (en) | 2016-05-25 |
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| CN105671593B (en) * | 2016-04-05 | 2017-09-01 | 内蒙古风光源节能环保科技有限公司 | A kind of full-automatic steel pawl dry powder liquid atomization absorption all-in-one |
| CN108262212B (en) * | 2018-04-18 | 2019-11-08 | 阿坝铝厂 | A kind of aluminum guide steel pawl ferrophosphorus casting end coated with graphite equipment |
Citations (2)
| Publication number | Priority date | Publication date | Assignee | Title |
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| CN1974862A (en) * | 2006-12-08 | 2007-06-06 | 中国铝业股份有限公司 | Process of dipping graphite onto anode steel pawl |
| CN201042696Y (en) * | 2007-04-13 | 2008-04-02 | 青铜峡铝业集团有限公司 | Device for anode steel paw dipping dry plumbago |
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2011
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Patent Citations (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN1974862A (en) * | 2006-12-08 | 2007-06-06 | 中国铝业股份有限公司 | Process of dipping graphite onto anode steel pawl |
| CN201042696Y (en) * | 2007-04-13 | 2008-04-02 | 青铜峡铝业集团有限公司 | Device for anode steel paw dipping dry plumbago |
Non-Patent Citations (2)
| Title |
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| 电解铝用预焙阳极钢爪沾石墨液工艺的改进;任飞雄，等;《云南冶金》;20100731;第39卷;第81-83页 * |
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Inventor after: Du Yufeng Inventor after: Wen Baosen Inventor after: Tang Guolin Inventor before: Xiong Ziqiang |
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Effective date of registration: 20171208 Address after: 831300 the Xinjiang Uygur Autonomous Region Wujiaqu City Industrial Park Patentee after: XINJIANG NONGLIUSHI ALUMINUM CO., LTD. Address before: Sheng Tong Industrial Park No. 109 Venus Road 410200 in Hunan province Changsha District of Wangcheng City Patentee before: Hunan Shengtong Technology Group Co., Ltd. |
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| CF01 | Termination of patent right due to non-payment of annual fee | ||
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Granted publication date: 20160525 Termination date: 20181030 |