CN203495173U - Large-diameter high-purity oxygen-free copper casting blank horizontal continuous casting conjoined furnace - Google Patents
Large-diameter high-purity oxygen-free copper casting blank horizontal continuous casting conjoined furnace Download PDFInfo
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- CN203495173U CN203495173U CN201320507733.5U CN201320507733U CN203495173U CN 203495173 U CN203495173 U CN 203495173U CN 201320507733 U CN201320507733 U CN 201320507733U CN 203495173 U CN203495173 U CN 203495173U
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Abstract
The utility model relates to a large-diameter high-purity oxygen-free copper casting blank horizontal continuous casting conjoined furnace, which comprises a smelting furnace, a heat preserving furnace and a crystallizer, wherein the bottom of the smelting furnace is communicated with the bottom of the heat preserving furnace through a pipeline, a melt outlet of the heat preserving furnace is connected with the crystallizer, the crystallizer is provided with a water cooling system, a calcined carbon layer is respectively arranged in the smelting furnace and the heat preserving furnace, the bottom of the smelting furnace is provided with a first argon pipeline, the bottom of the heat preserving furnace is provided with a second argon pipeline, and two opposite electromagnetic stirrers are installed on the outer wall of the smelting furnace. The large-diameter high-purity oxygen-free copper casting blank horizontal continuous casting conjoined furnace has the characteristic that the constant temperature and uniformity in smelting can be realized, the copper melt can be well deoxidized and dehydrogenated, the problem that the oxygen content is difficult to control can be solved, the entire product yield is greatly increased and can reach more than 90 percent, and a cross-cutting significance can be realized compared with the prior art.
Description
Technical field
The utility model relates to oxygen-free copper casting technology field, especially in the field of high-purity oxygen-free copper, provides a kind of major diameter high-purity oxygen-free copper strand horizontal continuous casting process and connected furnace thereof.
Background technology
Industrial pure copper (worked copper) is divided into tough pitch copper, phosphorized copper and oxygen-free copper conventionally, wherein oxygen-free copper quality grade is the highest, oxygen-free copper is a kind of high conductance fine copper, in chemical composition, there is purity high, impurity content is few, especially the very low feature of oxygen content, its most significant physical characteristic is to have high conductivity (annealed state is 100%IACS at least), good deformation performance and well welding and brazing property, is widely used in the territories such as electronics, communication and electrovacuum.
TU1(GBT5231-2001) be the oxygen-free copper trade mark that domestic grade is higher, TU1 oxygen-free copper (oxygen content is less than 10PPM), mainly for the manufacture of busbar, water-cooled cable, induction coil, high-grade switch, waveguide and various high-grade electrical connector, wide application, consumption is large.
Production for oxygen-free copper, overwhelming majority enterprise produces with antivacuum stove (power frequency induction furnace), therefore, the quality of oxygen-free copper is all unstable, be mainly manifested in its electric conductivity and high-strength, high-temperature behavior and be difficult to take into account, and the key that affects oxygen-free copper quality is the removal of hydrogen-oxygen atom in copper melt.
Oxygen content is the key character of oxygen-free copper, therefore reduces gaseous impurity in oxygen-free copper, such as oxygen and hydrogen, most important to high-purity oxygen-free copper metal acquisition stabilizing mechanical performance and electric property.
Traditional production technology for high-purity oxygen-free copper mainly contains following three kinds:
1, vacuum drying oven melting (under draw law technology): the method is to adopt medium frequency response ratio melting under vacuum condition, the product purity of producing is high, oxygen content can reach below 10PPM, but vacuum system is complicated and keep in repair loaded down with trivial details, equipment manufacturing cost is high, high to production environment and maintaining requirement, and is that noncontinuity is produced, production efficiency is low, causes production cost high.
2, the antivacuum stove melting of semi-continuous casting (power frequency induction furnace): this method is from smelting furnace metaideophone chute by high-temperature copper liquid, by chute, enter holding furnace again, due to the method, the source of oxygen is more in process of production, the bad control of oxygen content, so scrappage is higher, the one ton of copper raw material of take is example, the cost finally obtaining only has 600kg, be not difficult to know, its yield rate is low, and waste of material is too many.
3, horizontal casting: adopt while producing in this way, its advantage is that copper melt flows into holding furnace from smelting furnace by pipeline, avoided copper melt to contact with atmosphere, therefore the oxygen-free copper slab quality of producing is more stable, and invest little, cost is low, but the fatal shortcoming of this technique is the control of oxygen content, horizontal casting is uncontrollable for oxygen content, therefore to produce the oxygen-free copper of TU1 specification, have great difficulty.
Application number 02136815.5 discloses a kind of undercurrent type oxygen-free copper horizontal continuous casting technology and production equipment thereof, from its description and accompanying drawing part, can see, its melting furnace and holding furnace are all enclosed, although reduced the chance of impurity and Bubble formation, improved the quality of strand, but it does not solve the problem of copper oxygen content equally, its equipment cannot be removed impurities H and the oxygen in copper, therefore will produce TU1 oxygen-free copper, be very difficult.Therefore, if high finished product rate is produced TU1 oxygen-free copper, and cost is low again, and product quality is high is again a great problem that each enterprise urgently will solve at present.
Utility model content
The technical problems to be solved in the utility model is: in order to overcome, in prior art, to produce TU1 oxygen-free copper equipment manufacturing cost expensive, production cost is high and production efficiency is low, oxygen content technical problem rambunctious, the utility model provides the high-purity oxygen-free copper strand of a kind of major diameter based on horizontal casting method horizontal continuous casting linked furnace, it has the characteristic of the even melting of constant temperature, and well copper melt has been carried out to deoxidation dehydrogenation and processed, solved oxygen content problem rambunctious, whole yield rate is improved greatly, reach more than 90%, the meaning with respect to conventional art with leap property.
The utility model solves the technical scheme that its technical problem adopts: the high-purity oxygen-free copper strand of a kind of major diameter horizontal continuous casting linked furnace, comprise smelting furnace, holding furnace and crystallizer, pipeline communication is passed through with holding furnace bottom in described smelting furnace bottom, described holding furnace liquation outlet connects crystallizer, on described crystallizer, be furnished with water cooling system, in described smelting furnace and holding furnace, be provided with the charcoal layer after calcining, described smelting furnace bottom is provided with the first argon gas pipeline, holding furnace bottom is provided with the second argon gas pipeline, two relative magnetic stirrers are installed on smelting furnace outer wall.
Magnetic stirrer critical piece is the inductor that iron core and coil form, the operation principle of magnetic stirrer is similar to the operation principle of linear motor, inductor is equivalent to the stator of motor, copper melt is equivalent to the rotor of motor, the thickness of furnace wall has determined the air gap of motor, therefore, it is equivalent to a linear motor that air gap is very large.When passing into low-frequency current in inductor coil, will produce a travelling-magnetic-field, this magnetic field is through furnace wall, act on copper melt, in copper melt, produce induced potential and electric current, this induced current produces electromagnetic force with magnetic fields again, thereby promotes copper melt directed flow, plays stirring action, the argon gas that ar gas passage passes into can be taken the hydrogen-oxygen in copper melt out of floating, because argon molecules amount is large, hydrogen-oxygen molecular weight is little, argon gas is in floating-upward process, hydrogen-oxygen atom enters in argon molecules spacing, along with argon gas floating, taken out of, the bamboo-carbon layer covering with top reacts, concrete course of reaction is that carbon reacts generation carbon dioxide with the oxygen in molten copper, the carbon dioxide generating reacts with carbon and produces carbon monoxide, CO burning is produced carbon dioxide finally by bamboo Charcoal Adsorption, and this process coordinates after magnetic stirrer, its reaction speed is faster, deoxidation dehydrogenation effect is remarkable.
Further, connected furnace inner flow passage is improved, adopt first whole after whole method more separately, between described smelting furnace and holding furnace, identical pipeline comprises sprue and branch flow passage, sprue one end is communicated with smelting furnace, and the other end confluxes into holding furnace by two branch flow passages are dichotomous.Copper melt pools together before flowing into holding furnace, after two branch flow passage bifurcateds, be divided into two fluid streams and converge again inflow holding furnace, do like this effect that can play further mix and blend, allow copper melt mix in holding furnace more even, can guarantee further deoxidation dehydrogenation in holding furnace, stiffening effect.
For isolated air, prevent that impurity from entering, in described smelting furnace and holding furnace, be provided with bamboo-carbon layer or charcoal layer.As preferably, the bamboo-carbon layer after calcining is first-selected, and because bamboo charcoal is less than common charcoal space, particle is more even, after after baking, as cover layer deoxidation effect, is better than charcoal.
Improve further, described water cooling system comprises spiral water jacket, and described spiral water jacket is set in crystallizer, has coolant outlet and cooling water inlet on described spiral water jacket.
The channel of described holding furnace is vertical setting.Traditional holding furnace is horizontal channel, and the design makes into after vertical channel, heating region difference, improved the excessive phenomenon of ingot casting lower die, improve the uniformity of ingot casting grain size.
The beneficial effects of the utility model are to the utlity model has following advantage:
1, the even melting of constant temperature: constant temperature is to adopt temperature control technology to reach, evenly melting refers to that tough cathode is in smelting furnace during melting, for can be by the Impurity removal in copper, must when melting, constantly stir, and it is known from institute, during melting, temperature reaches degree more than 1100, so if that inevitable its material of shaft is set is high temperature resistant, also have other factors to consider, this undoubtedly will be complicated problem, and in this technique, adopt electromagnetic agitating technology, utilize electromagnetic field slowly to stir copper melt, guarantee that smelting furnace inner melt constant temperature is even, be conducive to separating out of impurity;
2, deoxidation dehydrogenation is strong: traditional copper melt cover layer is charcoal, this technology utilization bamboo charcoal is as the cover layer of copper melt, because its void ratio charcoal is less, mean after after baking as cover layer deoxidation effect due to common charcoal, this is one, in addition, at smelting furnace and holding furnace bottom, all passed into inert gas argon gas, argon molecules amount is large, when argon gas floats to top from the bottom of stove, hydrogen in copper melt can be taken out of together with oxygen atom, and passing into of inert gas also played certain stirring action, expand the contact-making surface of copper liquid and bamboo-carbon layer, strengthening reduction reaction improves deoxidation effect,
3, incremental, removal of impurities step by step: be the fusion process of tough cathode at smelting furnace, it in smelting furnace, is preliminary fusion process, utilize electromagnetic agitating technology that copper melt is mixed with impurity, the argon gas passing into plays preliminary deoxidation dehydrogenation, and copper melt in smelting furnace enters into after holding furnace, due to the state difference of copper (being solid-state to liquid process in smelting furnace), it in holding furnace, is the process of refining, now only need pass into argon gas, just can play deoxidation dehydrogenation well, by first refining to refining, make the oxygen content of casting in bronze base controlled, the standard that meets TU1 oxygen-free copper,
4, oxygen content is low: the oxygen-free copper strand that this technique obtains, and its oxygen content, below 10PPM, meets TU1 oxygen-free copper standard;
5, yield rate is high, and cost significantly reduces: the one ton of raw material of take are example, and the TU1 oxygen-free copper strand obtaining through this PROCESS FOR TREATMENT can reach more than 900 kilogram, and its loss is obviously little many, and yield rate has reached more than 90%, is breakthrough undoubtedly in the field.
Accompanying drawing explanation
Below in conjunction with drawings and Examples, the utility model is further illustrated.
Fig. 1 is the main TV structure figure of connected furnace of the present utility model;
Fig. 2 is the top view of connected furnace of the present utility model.
In figure: 1. smelting furnace, 2. holding furnace, 3. pipeline, 3-1. sprue, 3-2. branch flow passage, 4. the first argon gas pipeline, 5. the second argon gas pipeline, 6. bamboo-carbon layer, 7. crystallizer, 8. spiral water jacket, 8-1. coolant outlet, 8-2. cooling water inlet, 9. magnetic stirrer, 10. the second coolant outlet, 11. second cooling water inlets.
The specific embodiment
By reference to the accompanying drawings the utility model is described in further detail now.These accompanying drawings are the schematic diagram of simplification, basic structure of the present utility model is only described in a schematic way, so it only show the formation relevant with the utility model.
Embodiment
With reference to figure 1 Fig. 2, the connected furnace that the present embodiment adopts comprises smelting furnace 1, holding furnace 2 and crystallizer 7, pipeline communication is passed through in described smelting furnace 1 bottom and holding furnace 2 bottoms, the pipeline communicating between smelting furnace 1 and holding furnace 2 comprises sprue 3-1 and branch flow passage 3-2, sprue 3-1 one end is communicated with smelting furnace 1, and the other end confluxes into holding furnace 2 by two branch flow passage 3-2 are dichotomous.
As Fig. 1, in smelting furnace 1 and holding furnace 2, be provided with bamboo-carbon layer 6, holding furnace 2 liquation outlets connect graphite crystallizer 7, are set with spiral water jacket 8 on graphite crystallizer 7, have coolant outlet 8-1 and cooling water inlet 8-2 on spiral water jacket 8.
Channel in holding furnace 2 is vertical setting, and smelting furnace 1 bottom is provided with the first argon gas pipeline 4, and holding furnace 2 bottoms are provided with the second argon gas pipeline 5, and two relative magnetic stirrers 9 are installed on smelting furnace 1 outer wall.
As Fig. 1, the production equipment that the above-mentioned connected furnace of take is oxygen-free copper strand, is undertaken by following technique:
1) get the raw materials ready: get Cu-CATH-1 stand-by;
2) pretreatment: by stand-by tough cathode surface deoxidation layer and particle, the copper beans on copper surface, rim charge and hangers excision, then carry out the pre-heat treatment, preheat temperature is controlled at 280 ℃-300 ℃; The object of preheating is to remove the moisture on copper surface, because cold burden or moist tough cathode can cause and splash in molten bath, therefore must do pretreatment;
3) melting: first will put into smelting furnace 1 melting through pretreated tough cathode, smelting temperature is controlled at 1180-1230 ℃, in smelting furnace 1 bottom, pass into argon gas simultaneously, and copper melt top is floating, there is the bamboo charcoal after calcining to cover, on the one hand isolated air, reduce on the other hand deoxidation, next utilizes electromagnetic agitation to stir copper melt, outer wall at smelting furnace is loaded onto coil, after energising, will produce magnetic field, act on copper melt, in copper melt, produce induced potential and electric current, induced-current produces electromagnetic force with magnetic fields again, thereby promote copper melt directed flow, play stirring action, this step is the preliminary deoxidation dehydrogenation of copper melt,
4) insulation: the potential energy difference of utilizing smelting furnace 1 and holding furnace 2, copper melt after melting in smelting furnace 1 is entered in holding furnace 2 by pipeline undercurrent, in holding furnace 2 bottoms, pass into argon gas simultaneously, copper melt top is floating has the bamboo charcoal after calcining to cover, and the interior temperature of holding furnace 2 is controlled at 1180-1230 ℃; This step is carried out deoxidation dehydrogenation further in holding furnace 2, is the process of refining;
5) casting: the copper melt in holding furnace 2 is imported to graphite crystallizer 7, then to graphite crystallizer 7 water coolings, obtain high-purity oxygen-free copper strand.As Fig. 2, the water cooling is here that secondary is cooling, comprises the second cooling water inlet 11 and the second coolant outlet 10, cooling through twice after temperature drop to below 200 ℃, fully guarantee ingot casting intensity of cooling and cooling uniformity.
Finally, by the high-purity oxygen-free copper strand sawing obtaining, then pack.High-purity oxygen-free copper that this explained hereafter obtains is all qualified after check, and result is as following table:
| Sequence number | Project | Specification requirement | Assay | Evaluate |
| 1 | Cu+Ag,% | ≥99.97 | 99.97 | Qualified |
| 2 | P，% | ≤0.002 | 0.001 | Qualified |
| 3 | O，% | ≤0.002 | 0.001 | Qualified |
The oxygen-free copper strand that this technique obtains, its oxygen content, below 10PPM, meets TU1 oxygen-free copper standard; And yield rate is high, cost significantly reduces: the one ton of raw material of take are example, and the TU1 oxygen-free copper strand obtaining through this PROCESS FOR TREATMENT can reach more than 900 kilogram, and its loss is obviously little many, and yield rate has reached more than 90%, is breakthrough undoubtedly in the field.
Claims (5)
1. the high-purity oxygen-free copper strand of a major diameter horizontal continuous casting linked furnace, comprise smelting furnace, holding furnace and crystallizer, pipeline communication is passed through with holding furnace bottom in described smelting furnace bottom, described holding furnace liquation outlet connects crystallizer, on described crystallizer, be furnished with water cooling system, it is characterized in that: in described smelting furnace and holding furnace, be provided with the charcoal layer after calcining, described smelting furnace bottom is provided with the first argon gas pipeline, holding furnace bottom is provided with the second argon gas pipeline, and two relative magnetic stirrers are installed on smelting furnace outer wall.
2. the high-purity oxygen-free copper strand of major diameter as claimed in claim 1 horizontal continuous casting linked furnace, it is characterized in that: pipeline identical between described smelting furnace and holding furnace comprises sprue and branch flow passage, sprue one end is communicated with smelting furnace, and the other end confluxes into holding furnace by two branch flow passages are dichotomous.
3. the high-purity oxygen-free copper strand of major diameter as claimed in claim 1 horizontal continuous casting linked furnace, is characterized in that: described charcoal layer is bamboo-carbon layer or charcoal layer.
4. the high-purity oxygen-free copper strand of major diameter as claimed in claim 1 horizontal continuous casting linked furnace, it is characterized in that: described water cooling system comprises spiral water jacket, described spiral water jacket is set in crystallizer, has coolant outlet and cooling water inlet on described spiral water jacket.
5. the high-purity oxygen-free copper strand of major diameter as claimed in claim 1 horizontal continuous casting linked furnace, is characterized in that: the channel of described holding furnace arranges for vertical.
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| CN201320507733.5U CN203495173U (en) | 2013-08-19 | 2013-08-19 | Large-diameter high-purity oxygen-free copper casting blank horizontal continuous casting conjoined furnace |
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| CN104985172A (en) * | 2015-07-27 | 2015-10-21 | 浙江虹绢铜业有限公司 | Metal smelting furnace |
| CN105132730A (en) * | 2015-08-28 | 2015-12-09 | 上海飞驰铜铝材有限公司 | High-density, high-conductivity and oxygen-free copper and preparation method thereof |
| CN105522125A (en) * | 2016-01-22 | 2016-04-27 | 浙江天宁合金材料有限公司 | Device for overcoming blow hole defect of horizontal continuous casting products of lead brass |
| CN106637021A (en) * | 2016-12-28 | 2017-05-10 | 江苏大力神科技股份有限公司 | Electromagnetic stirring zinc pot |
| CN106766916A (en) * | 2016-12-02 | 2017-05-31 | 中铁建电气化局集团康远新材料有限公司 | Non-vacuum melting device |
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| CN110405168A (en) * | 2019-07-18 | 2019-11-05 | 上海海亮铜业有限公司 | Red copper horizontal casting scaling loss removes iron processes |
| CN111304458A (en) * | 2020-03-27 | 2020-06-19 | 芜湖楚江合金铜材有限公司 | High accuracy red copper contact pin production is with deoxidization smelting unit |
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| CN104985172A (en) * | 2015-07-27 | 2015-10-21 | 浙江虹绢铜业有限公司 | Metal smelting furnace |
| CN105132730A (en) * | 2015-08-28 | 2015-12-09 | 上海飞驰铜铝材有限公司 | High-density, high-conductivity and oxygen-free copper and preparation method thereof |
| CN105522125A (en) * | 2016-01-22 | 2016-04-27 | 浙江天宁合金材料有限公司 | Device for overcoming blow hole defect of horizontal continuous casting products of lead brass |
| CN106766916B (en) * | 2016-12-02 | 2019-04-16 | 中铁建电气化局集团康远新材料有限公司 | Non-vacuum melting device |
| CN106766916A (en) * | 2016-12-02 | 2017-05-31 | 中铁建电气化局集团康远新材料有限公司 | Non-vacuum melting device |
| CN106637021A (en) * | 2016-12-28 | 2017-05-10 | 江苏大力神科技股份有限公司 | Electromagnetic stirring zinc pot |
| CN109530643A (en) * | 2018-12-29 | 2019-03-29 | 贵溪骏达特种铜材有限公司 | A kind of aluminium bronze pipe rod type material horizontal casting smelting furnace based on electromagnetic agitation |
| CN109530643B (en) * | 2018-12-29 | 2020-09-18 | 贵溪骏达特种铜材有限公司 | Aluminum bronze tube bar section bar horizontal continuous casting smelting furnace based on electromagnetic stirring |
| CN110405168A (en) * | 2019-07-18 | 2019-11-05 | 上海海亮铜业有限公司 | Red copper horizontal casting scaling loss removes iron processes |
| CN110315042A (en) * | 2019-08-14 | 2019-10-11 | 燕山大学 | A kind of agitating device for horizontal casting precision White brass alloy pipe |
| CN110315042B (en) * | 2019-08-14 | 2020-09-04 | 燕山大学 | A agitating unit for accurate cupronickel alloy pipe of horizontal continuous casting |
| CN111304458A (en) * | 2020-03-27 | 2020-06-19 | 芜湖楚江合金铜材有限公司 | High accuracy red copper contact pin production is with deoxidization smelting unit |
| CN112921185A (en) * | 2021-01-11 | 2021-06-08 | 广东龙丰精密铜管有限公司 | Production method for uniformity of TU1 cast blank crystal grains |
| CN114799096A (en) * | 2022-05-17 | 2022-07-29 | 张秀英 | Horizontal continuous casting furnace and rapid furnace starting method |
| CN114799096B (en) * | 2022-05-17 | 2023-10-13 | 锦州远腾电炉科技有限公司 | Horizontal continuous casting furnace and quick furnace starting method |
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