CN105132730A - High-density, high-conductivity and oxygen-free copper and preparation method thereof - Google Patents
High-density, high-conductivity and oxygen-free copper and preparation method thereof Download PDFInfo
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- CN105132730A CN105132730A CN201510540231.6A CN201510540231A CN105132730A CN 105132730 A CN105132730 A CN 105132730A CN 201510540231 A CN201510540231 A CN 201510540231A CN 105132730 A CN105132730 A CN 105132730A
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Abstract
The invention belongs to the technical field of metallurgy and particularly relates to a preparation method of a high-density, high-conductivity and oxygen-free copper. The method comprises the following steps: selecting standard cathode copper as a raw material, carrying out pretreatment such as rust removal on the copper, and then drying the copper; subsequently smelting the copper, in which the surface of the copper liquid is covered by completely-forged wood charcoal and is isolated from air in the smelting process; introducing inert gas after finishing smelting, adding a refining agent containing rare earth into a melt, and carrying out slag removal and oxygen removal treatment on the smelt; standing and pouring the melt; and pouring and molding the melt in a high-purity graphite crystallizer, in which the forged ash is used for covering the copper liquid in the crystallizer during pouring. The method has the advantages that the copper with the content of oxygen being lower than 8ppm can be prepared, the conductivity of the prepared copper is greater than that of the conventional oxygen-free copper by 1%IACS, and the density of the prepared copper is greater than 8.93g/cm<3>; the technical problems of low conductivity, low heat conductivity, small density and low voltage resistance of the ordinary pure copper or silver-copper bars in the prior art can be solved.
Description
Technical field
The present invention relates to metallurgical technology field, particularly relate to the highly dense oxygen-free high conductivity type copper for nuclear power, high-end devices manufacture field, particularly a kind of highly dense oxygen-free high conductivity type copper for nuclear power nucleosynthesis, the manufacture of medical facilities proton cutter and preparation method thereof.
Background technology
Nucleosynthesis can not bring the environmental problems such as radiocontamination because of it, and its raw material directly takes from deuterium, tritium rich in seawater, is therefore desirable energy resource supply mode.Huge generator in nucleosynthesis generating set, must have efficient cooling system, to maintain normal power generation operation.Heat-eliminating medium and mode directly affect the power generation capacity of generator, and method of cooling used at present mainly contains air cooling, hydrogen_cooling and water cooling.Air cooling usefulness is minimum, and hydrogen_cooling is higher than air cooling usefulness 3 ~ 4 times, because the thermal capacity of water is large, heat conduction and heat-sinking capability strong, therefore water cooling effect is best, higher than air cooling usefulness 40 ~ 50 times.Therefore in nucleosynthesis generating set, preferably water cooling system ensures the normal operation of generating set.
Oxygen free copper becomes the preferred material of water cooling system in nucleosynthesis generating set due to its excellent electrical and thermal conductivity performance.But, the singularity of and Application Areas complicated due to its applied environment, do not allow to occur any quality accident, very high to the requirement of material, oxygen free copper due to its foreign matter content low, oxygen level is few, its electrical and thermal conductivity performance is superior, because its density is higher, its compressive property is high, is well positioned to meet above-mentioned requirements.
Summary of the invention
The object of the invention is to make up the deficiencies in the prior art, providing a kind of highly dense oxygen-free high conductivity type copper material and preparation method thereof, it is high that obtained fine copper or silver-bearing copper row material have conductive and heat-conductive rate, the features such as anti-pressure ability is strong.
In order to realize object of the present invention, the technical scheme of employing is:
A preparation method for highly dense oxygen-free high conductivity type copper material, is characterized in that, comprise the following steps:
1), pre-treatment: select No. 1 electrolytic copper as raw material, eliminated rust in described electrolytic copper surface, except verdigris, the process of copper beans, then dry;
2), melting: melting heating and temperature control is at 1140 ~ 1240 DEG C, and in fusion process, copper liquid surface adopts and calcines charcoal covering thoroughly, and cladding thickness is 180 ~ 200cm;
3), remove the gred deoxygenation: insulation after melting completes, in insulating process, by rare gas element, the refining agent containing rare earth is added melt, melt is removed the gred and deoxygenation process, and a straight-through rare gas element is in body of heater, covering protection is again carried out to melt, plays starvation and deoxidation effect;
Building bell, continuing passing into above-mentioned rare gas element in body of heater, make to keep malleation in body of heater, leave standstill 10 ~ 30 minutes,
4), pour into a mould: casting in graphite crystallizer, pouring temperature 1150 DEG C ~ 1180 DEG C, covers the copper liquid in crystallizer with burnt cigarette ash during cast;
5), cooling: 4 mutual vertical portals selected by the cooling system of graphite crystallizer, and water inlet direction is for carry out water cooling along crystallizer cylindrical tangential direction.This ensure that cooling performance, ensure that current abundant convection current in a crystallizer simultaneously, ensure that the homogeneity of cooling, ensure that the homogeneous microstructure of ingot casting is tiny, decrease the appearance of pore, shrinkage cavity.
Preferably: select during the calcining of described charcoal, reject insufficiently burnt and that water content is high charcoal, and select size to be the charcoal of 20 ~ 60mm, and then carry out calcining oven dry.
Preferably: described rare earth is Ce or Zr.
Preferably: described content of rare earth is 1 ~ 10%, more preferably 5 ~ 8%.
Preferably: described rare gas element is nitrogen or argon gas.
Preferably: the purity of described graphite crystallizer is 99.9%.Pour into a mould graphite rod used, graphite bowl, graphite are gravied with meat or vegetables poured over rice or noodles, graphite crystallizer all adopts purity to reach the high purity graphite of 99.9%.
Preferably: described casting speed is 80 ~ 120mm/min, described cooling water pressure 0.08 ~ 0.15MPa.
The invention also discloses the copper material obtained according to the preparation method of above-mentioned highly dense oxygen-free high conductivity type copper material.
The beneficial effect that the present invention has:
Can prepare the copper material of oxygen level at below 8ppm, and electric conductivity exceeds 1%IACS than conventional oxygen free copper, density is at 8.93g/cm
3and more than.Can solve existing general fine copper or silver-bearing copper row material conductive and heat-conductive rate is lower, density is little, the technical problem of anti-pressure ability deficiency.
Embodiment
Below in conjunction with embodiment, the invention will be further described, but protection scope of the present invention is not only confined to embodiment.
Embodiment 1:
1) select 1# electrolytic copper as raw material, surface derusting carried out to electrolytic copper, goes out verdigris, the process of copper beans, and carry out drying and processing, add in 750kg cored electric furnace;
2) 1# electrolytic copper adds in batches, adds hot smelting, and smelting temperature is 1200 DEG C, and in fusion process, copper liquid surface adopted cigarette ash that is calcined, that selected to cover, and cladding thickness is 180cm;
3) with argon gas by 0.1% join in melt carry out slagging-off deoxygenation process containing rare earth self-control refining agent;
4) be incubated, pass into nitrogen protection in body of heater, and build bell, leave standstill tapping casting after 10 minutes, pouring temperature 1160 DEG C;
5) insulation is cast after terminating, vertical casting, ingot diameters 150mm, and casting speed is 110mm/min, cooling water pressure 0.08MPa;
It is 8.93g/cm that the height of preparation leads highly dense oxygen-free copper material density
3, oxygen level is 7ppm, and after water seal extruding, electric conductivity is 99.7%IACS;
Embodiment 2:
1) select 1# electrolytic copper as raw material, surface derusting carried out to electrolytic copper, goes out verdigris, the process of copper beans, and carry out drying and processing, add in 750kg cored electric furnace;
2) 1# electrolytic copper adds in batches, adds hot smelting, and smelting temperature is 1210 DEG C, and in fusion process, copper liquid surface adopted cigarette ash that is calcined, that selected to cover, and cladding thickness is 200cm;
3) with argon gas by 0.3% join in melt carry out slagging-off deoxygenation process containing rare earth self-control refining agent;
4) be incubated, pass into nitrogen protection in body of heater, and build bell, leave standstill tapping casting after 25 minutes, pouring temperature 1180 DEG C;
5) insulation is cast after terminating, vertical casting, ingot diameters 150mm, and casting speed is 115mm/min, cooling water pressure 0.1MPa;
It is 8.95g/cm that the height of preparation leads highly dense oxygen-free copper material density
3, oxygen level is 5ppm, and after water seal extruding, electric conductivity is 100.6%IACS;
Embodiment 3:
1) select 1# electrolytic copper as raw material, surface derusting carried out to electrolytic copper, goes out verdigris, the process of copper beans, and carry out drying and processing, add in 1500kg cored electric furnace;
2) 1# electrolytic copper adds in batches, adds hot smelting, and smelting temperature is 1210 DEG C, and in fusion process, copper liquid surface adopted cigarette ash that is calcined, that selected to cover, and cladding thickness is 190cm;
3) with argon gas by 0.05% join in melt carry out slagging-off deoxygenation process containing rare earth self-control refining agent;
4) be incubated, pass into nitrogen protection in body of heater, and build bell, leave standstill tapping casting after 15 minutes, pouring temperature 1175 DEG C;
5) insulation is cast after terminating, vertical casting, ingot diameters 250mm, and casting speed is 85mm/min, cooling water pressure 0.15MPa;
It is 8.94g/cm that the height of preparation leads highly dense oxygen-free copper material density
3, oxygen level is 4ppm, and after water seal extruding, electric conductivity is 100.2%IACS;
Embodiment 4:
1) select 1# electrolytic copper as raw material, surface derusting carried out to electrolytic copper, goes out verdigris, the process of copper beans, and carry out drying and processing, add in 750kg cored electric furnace;
2) 1# electrolytic copper adds in batches, adds hot smelting, and smelting temperature is 1190 DEG C, and in fusion process, copper liquid surface adopted cigarette ash that is calcined, that selected to cover, and cladding thickness is 180cm;
3) with argon gas by 0.08% join in melt carry out slagging-off deoxygenation process containing rare earth self-control refining agent;
4) be incubated, pass into nitrogen protection in body of heater, and build bell, leave standstill tapping casting after 15 minutes, pouring temperature 1170 DEG C;
5) insulation is cast after terminating, vertical casting, ingot diameters 150mm, and casting speed is 120mm/min, cooling water pressure 0.13MPa;
It is 8.94g/cm that the height of preparation leads highly dense oxygen-free copper material density
3, oxygen level is 6ppm, and after water seal extruding, electric conductivity is 100.4%IACS.
Last it is noted that above embodiment only in order to illustrate the present invention and and unrestricted technical scheme described in the invention; Therefore, although this specification sheets with reference to each above-mentioned embodiment to present invention has been detailed description, those of ordinary skill in the art should be appreciated that and still can modify to the present invention or equivalent to replace; And all do not depart from technical scheme and the improvement thereof of the spirit and scope of the present invention, it all should be encompassed in right of the present invention.
Claims (7)
1. a preparation method for highly dense oxygen-free high conductivity type copper material, is characterized in that, comprise the following steps:
1), pre-treatment: select No. 1 electrolytic copper as raw material, eliminated rust in described electrolytic copper surface, except verdigris, the process of copper beans, then dry;
2), melting: melting heating and temperature control is at 1140 ~ 1240 DEG C, and in fusion process, copper liquid surface adopts and calcines charcoal covering thoroughly, and cladding thickness is 180 ~ 200cm;
3), remove the gred deoxygenation: insulation after melting completes, in insulating process, by rare gas element, the refining agent containing rare earth is added melt, melt is removed the gred and deoxygenation process, and a straight-through rare gas element is in body of heater, covering protection is again carried out to melt, plays starvation and deoxidation effect;
Building bell, continuing passing into above-mentioned rare gas element in body of heater, make to keep malleation in body of heater, leave standstill cast of coming out of the stove after 10 ~ 30 minutes,
4), pour into a mould: casting in graphite crystallizer, pouring temperature 1150 DEG C ~ 1180 DEG C, covers the copper liquid in crystallizer with burnt cigarette ash during cast;
5), cooling: 4 mutual vertical portals selected by the cooling system of graphite crystallizer, and water inlet direction is for carry out water cooling along crystallizer cylindrical tangential direction.
2. the preparation method of highly dense oxygen-free high conductivity type copper material according to claim 1, it is characterized in that: select during described charcoal calcining, reject the charcoal that insufficiently burnt and water content is high, and select size to be the charcoal of 20 ~ 60mm, and then carry out calcining oven dry.
3. the preparation method of highly dense oxygen-free high conductivity type copper material according to claim 1, is characterized in that: described rare earth is Ce or Zr.
4. the preparation method of highly dense oxygen-free high conductivity type copper material according to claim 1, is characterized in that: described rare gas element is nitrogen or argon gas.
5. the preparation method of highly dense oxygen-free high conductivity type copper material according to claim 1, is characterized in that: described content of rare earth is 1 ~ 10%.
6. the preparation method of highly dense oxygen-free high conductivity type copper material according to claim 1, is characterized in that: described casting speed is 80 ~ 120mm/min, described cooling water pressure 0.08 ~ 0.15MPa.
7. the copper material that the preparation method of the highly dense oxygen-free high conductivity type copper material any one of claim 1 ~ claim 6 described in claim obtains.
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Cited By (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN106086444A (en) * | 2016-08-10 | 2016-11-09 | 安徽晋源铜业有限公司 | A kind of up-drawing method prepares the method for high-purity oxygen-free copper bar |
| CN106269970A (en) * | 2016-08-10 | 2017-01-04 | 安徽晋源铜业有限公司 | A kind of preparation technology of high-strength highly-conductive micro-wire |
| CN107988491A (en) * | 2017-12-12 | 2018-05-04 | 芜湖精艺铜业有限公司 | Oxygen-free copper production technology |
| CN114150179A (en) * | 2021-12-06 | 2022-03-08 | 中国科学院金属研究所 | Oxygen-free copper material, oxygen-free copper material product and preparation method thereof |
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| CN103540764A (en) * | 2013-10-16 | 2014-01-29 | 河南科技大学 | Preparation method of high-purity oxygen-free copper material |
| CN203495173U (en) * | 2013-08-19 | 2014-03-26 | 江苏兴荣美乐铜业有限公司 | Large-diameter high-purity oxygen-free copper casting blank horizontal continuous casting conjoined furnace |
| CN203960312U (en) * | 2014-06-30 | 2014-11-26 | 山东中佳新材料有限公司 | The antivacuum casting apparatus of a kind of high heat pipe |
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| CN101234411A (en) * | 2008-02-04 | 2008-08-06 | 江阴天奋科技有限公司 | Oxygen-free copper horizontal continuous casting linked furnace tunnel type flow melt high-efficiency degasification method |
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Cited By (5)
| Publication number | Priority date | Publication date | Assignee | Title |
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| CN106086444A (en) * | 2016-08-10 | 2016-11-09 | 安徽晋源铜业有限公司 | A kind of up-drawing method prepares the method for high-purity oxygen-free copper bar |
| CN106269970A (en) * | 2016-08-10 | 2017-01-04 | 安徽晋源铜业有限公司 | A kind of preparation technology of high-strength highly-conductive micro-wire |
| CN106086444B (en) * | 2016-08-10 | 2018-09-14 | 安徽晋源铜业有限公司 | A kind of method that up-drawing method prepares high-purity oxygen-free copper bar |
| CN107988491A (en) * | 2017-12-12 | 2018-05-04 | 芜湖精艺铜业有限公司 | Oxygen-free copper production technology |
| CN114150179A (en) * | 2021-12-06 | 2022-03-08 | 中国科学院金属研究所 | Oxygen-free copper material, oxygen-free copper material product and preparation method thereof |
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Inventor after: Zhou Honglei Inventor after: Xu Gang Inventor after: Li Honglei Inventor after: Fu Shaoli Inventor before: Zhou Honglei Inventor before: Xu Gang Inventor before: Li Honglei |
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