CN102764862A - Horizontal continuous casting graphite crystallizer by aid of nitrogen protection method - Google Patents
Horizontal continuous casting graphite crystallizer by aid of nitrogen protection method Download PDFInfo
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- CN102764862A CN102764862A CN2012102585256A CN201210258525A CN102764862A CN 102764862 A CN102764862 A CN 102764862A CN 2012102585256 A CN2012102585256 A CN 2012102585256A CN 201210258525 A CN201210258525 A CN 201210258525A CN 102764862 A CN102764862 A CN 102764862A
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- graphite crystallizer
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Abstract
The invention discloses a horizontal continuous casting graphite crystallizer by the aid of a nitrogen protection method, and belongs to the technical field of metallurgical equipment. The horizontal continuous casting graphite crystallizer is used for copper continuous casting equipment and comprises a tubular graphite sleeve, a crystallizing cavity is formed inside the graphite sleeve, an annular groove is milled at the lower end of the graphite sleeve, through holes which are communicated with the crystallizing cavity are drilled on the annular groove, a communicating hole is drilled at the bottom of the graphite sleeve and communicated with the through holes, and a capillary tube is further disposed in the communicating hole and connected to an external nitrogen tube. After the structure is adopted, oxidation of the graphite crystallizer is effectively stopped, and the service life of the graphite crystallizer is prolonged. Besides, air behind a crystallization point of the graphite crystallizer is isolated by nitrogen, a copper billet is effectively prevented from contacting with the air when in crystallization, oxidation of a tube billet is prevented, and accordingly problems that an existing graphite crystallizer is short in service life, the surface of a copper billet is oxidized and has severe convex marks and a copper crystallization effect is poor are solved.
Description
Technical field
The present invention relates to a kind of nitrogen protection method horizontal continuous casting graphite crystallizer that is used for the copper continuous casting equipment, belong to technical field of metallurgical equipment.
Background technology
The graphite crystallizer life-span that present copper level continuous casting equipment generally uses is very short, and copper liquid crystallisation by cooling in graphite crystallizer has no protection.Since carry out under the about 1150-1165 of the temperature ℃ hot environment the during crystallization of copper liquid, serious to the oxidation of graphite crystallizer; Graphite surface is behind high-temperature oxydation, and case hardness can descend thereupon, is become solid-state after the copper liquid crystallization simultaneously by liquid state; Direct friction graphite crystallizer inwall in the process of pulling out; Cause in the graphite inwall short time cut to occur, graphite crystallizer inwall cut causes follow-up crystalline copper base surface convex epirelief to occur again, and convex epirelief strengthens the graphite crystallization inwall is scratched; Vicious circle so just appears; Shorten graphite crystallizer service life greatly, the graphite crystallizer life-span of therefore having caused present horizontal continuous-casting to use is shorter, generally about 2-3 days.
Summary of the invention
The technical problem that the present invention will solve provides a kind of graphite crystallizer service life of can effectively prolonging, and avoids copper base surface convex epirelief to occur, improves the nitrogen protection method horizontal continuous casting graphite crystallizer of copper degree of crystallinity.
In order to solve the problems of the technologies described above; Nitrogen protection method horizontal continuous casting graphite crystallizer of the present invention comprises the graphite cannula of a tubulose; In graphite cannula, be provided with the sizing graphite rod; Form a crystallization cavity between graphite cannula and the graphite rod, the periphery of graphite cannula lower end part is milled with cannelure, is drilled with the open-work that is communicated with the crystallization cavity on the cannelure; The graphite cannula bottom part is drilled with intercommunicating pore, and said intercommunicating pore is connected with open-work, is provided with capillary in the intercommunicating pore, and said capillary is connected on the nitrogen tube.
The quantity of said open-work is more than 5 and evenly is arranged on the cannelure.
Position, said graphite cannula upper end also is drilled with the venthole that communicates with the crystallization cavity.
After adopting above-mentioned structure; Because cannelure that is provided with and open-work and the intercommunicating pore that is connected with open-work; Intercommunicating pore is connected on the nitrogen tube, in use can make graphite crystallizer add nitrogen protection on every side through the logical nitrogen of intercommunicating pore, behind the adding nitrogen; Stop the oxidation of graphite crystallizer effectively, prolonged graphite crystallizer service life.Simultaneously, nitrogen is secluding air behind the graphite crystallizer crystalline temperature, contacts with air when effectively stoping the crystallization of copper base; Avoid the oxidation of base pipe, thereby avoided owing to the graphite surface high-temperature oxydation, case hardness descends; Become solid-stately after the crystallization of copper liquid by liquid state, cause the cut that occurs in the graphite inwall short time, the convex epirelief of also just having avoided follow-up crystalline copper base surface to occur; Prolonged graphite crystallizer service life greatly, and low temperature nitrogen has promoted the cooling of copper base effectively at contact copper base pipe; Help the copper crystallization, refinement copper grain size.It is short also just to have solved graphite crystallizer service life, and copper base surface oxidation, convex epirelief are serious, the problem of copper crystallization difference.
Description of drawings
Fig. 1 is a nitrogen protection method horizontal continuous casting graphite crystallizer front view of the present invention;
Fig. 2 is a nitrogen protection method horizontal continuous casting graphite crystallizer vertical view of the present invention;
Fig. 3 is a nitrogen protection method horizontal continuous casting graphite crystallizer upward view of the present invention.
The specific embodiment
As shown in the figure; Nitrogen protection method horizontal continuous casting graphite crystallizer of the present invention; Comprise the graphite cannula 1 of a tubulose, in graphite cannula 1, be provided with sizing graphite rod 2, form a crystallization cavity 3 between graphite cannula 1 and the graphite rod 2; The periphery of graphite cannula 1 lower end part is milled with cannelure 4, is drilled with the open-work 5 that is communicated with crystallization cavity 3 on the cannelure 4; Graphite cannula 1 bottom part is drilled with intercommunicating pore 6, and intercommunicating pore 6 is connected with open-work 5, is provided with capillary in the intercommunicating pore 6, and said capillary is connected on the nitrogen tube 7.The quantity of said open-work 5 is more than 5 and evenly is arranged on the cannelure 4.
On the basis of said apparatus, position, above-mentioned graphite cannula 1 upper end also is drilled with the venthole 8 that communicates with crystallization cavity 3.
During manufacturing, at first mill a cannelure at the lower end part from graphite crystallizer, in cannelure, bore 5-6 open-work uniformly, (can confirm the quantity of open-work according to concrete instructions for use) and brill pass through graphite crystallizer, make it be communicated with crystallization cavity 3; Bore an intercommunicating pore 6 in the graphite crystallizer bottom of graphite crystallizer simultaneously; Till getting into cannelure and open-work 5 being connected, the capillary with corresponding size inserts certain depth from intercommunicating pore then, and capillary is connected on the nitrogen tube and gets final product; During use; The logical nitrogen of going up gets final product, and pulls out back about 30 minutes at copper base pipe, and nitrogen valve is opened.Require more than 99.99% for nitrogen gas purity, pressure is greater than 0.4MPa.Can also be drilled with venthole 8 at graphite crystallizer back segment position in order to reach better effect.
After adopting nitrogen protection method horizontal continuous casting graphite crystallizer of the present invention, graphite crystallizer service life extended to average 6-7 days by original average 2-3 days, and the long life reaches 15 days.By 1150 yuan of calculating of each crystallizer, only graphite crystallizer is annual practices thrift 300,000 yuan than original technology by most up-to-date techniques.Surface oxidation is lighter, and originally the base pipe mills the about 1mm of face thickness, and being kept to the thickness of washing one's face now is 0.5mm, and annual waste material reduces 56 tons, increases about 280,000 yuan of benefit.The copper pipe quality is significantly improved, and light-wall pipe is by at present the thinnest 0.25 producing 0.2, and percentage elongation is greater than 55%, and resistance to compression pressure reaches 14MPa, and is bigger 2 times than the destructive testing pressure 7MPa of country, produced great economic benefits.
Claims (3)
1. nitrogen protection method horizontal continuous casting graphite crystallizer; The graphite cannula (1) that comprises a tubulose; In graphite cannula (1), be provided with sizing graphite rod (2); Form a crystallization cavity (3) between graphite cannula (1) and the graphite rod (2), it is characterized in that: the periphery of said graphite cannula (1) lower end part is milled with cannelure (4), is drilled with the open-work (5) that is communicated with crystallization cavity (3) on the cannelure (4); Said graphite cannula (1) bottom part is drilled with intercommunicating pore (6), and said intercommunicating pore (6) is connected with open-work (5), and said intercommunicating pore is provided with capillary in (6), and said capillary is connected on the nitrogen tube (7).
2. according to the described nitrogen protection method horizontal continuous casting graphite crystallizer of claim 1, it is characterized in that: the quantity of said open-work (5) is more than 5 and evenly is arranged on the cannelure (4).
3. according to the described nitrogen protection method horizontal continuous casting graphite crystallizer of claim 1, it is characterized in that: position, said graphite cannula (1) upper end also is drilled with the venthole (8) that communicates with crystallization cavity (3).
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN2012102585256A CN102764862A (en) | 2012-07-24 | 2012-07-24 | Horizontal continuous casting graphite crystallizer by aid of nitrogen protection method |
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| Application Number | Priority Date | Filing Date | Title |
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| CN2012102585256A CN102764862A (en) | 2012-07-24 | 2012-07-24 | Horizontal continuous casting graphite crystallizer by aid of nitrogen protection method |
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| CN102764862A true CN102764862A (en) | 2012-11-07 |
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| CN2012102585256A Pending CN102764862A (en) | 2012-07-24 | 2012-07-24 | Horizontal continuous casting graphite crystallizer by aid of nitrogen protection method |
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Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN107321941A (en) * | 2017-07-17 | 2017-11-07 | 无锡隆达金属材料有限公司 | A kind of horizontal casting White brass alloy pipe crystallizer die graphite inner sleeve |
| CN109570460A (en) * | 2019-01-31 | 2019-04-05 | 上海海亮铜业有限公司 | A kind of horizontal continuous casting of copper alloy graphite crystallizer |
| CN114871393A (en) * | 2022-04-27 | 2022-08-09 | 佛山建投华鸿铜业有限公司 | Method for protecting crystallizer by nitrogen to reduce loss |
-
2012
- 2012-07-24 CN CN2012102585256A patent/CN102764862A/en active Pending
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN107321941A (en) * | 2017-07-17 | 2017-11-07 | 无锡隆达金属材料有限公司 | A kind of horizontal casting White brass alloy pipe crystallizer die graphite inner sleeve |
| CN109570460A (en) * | 2019-01-31 | 2019-04-05 | 上海海亮铜业有限公司 | A kind of horizontal continuous casting of copper alloy graphite crystallizer |
| CN114871393A (en) * | 2022-04-27 | 2022-08-09 | 佛山建投华鸿铜业有限公司 | Method for protecting crystallizer by nitrogen to reduce loss |
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Application publication date: 20121107 |