CN203610629U - Gas-protected crystallizer for horizontal continuous casting of copper tubes - Google Patents

Gas-protected crystallizer for horizontal continuous casting of copper tubes Download PDF

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Publication number
CN203610629U
CN203610629U CN201320873591.4U CN201320873591U CN203610629U CN 203610629 U CN203610629 U CN 203610629U CN 201320873591 U CN201320873591 U CN 201320873591U CN 203610629 U CN203610629 U CN 203610629U
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China
Prior art keywords
gas
graphite
cooling
continuous casting
crystallizer
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CN201320873591.4U
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Chinese (zh)
Inventor
燕志富
孟文光
李忠茂
李明竹
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山东亨圆铜业有限公司
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Priority to CN201320873591.4U priority Critical patent/CN203610629U/en
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Publication of CN203610629U publication Critical patent/CN203610629U/en

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Abstract

The utility model relates to a gas-protected crystallizer for the horizontal continuous casting of copper tubes. According to the gas-protected crystallizer, a liquid inlet is formed in the lower part of a graphite jacket, and a pressing plate, a flange and a cooling copper sleeve are sequentially sleeved on the graphite jacket upwardly from the middle part; a cooling water jacket is arranged at the inner side of the pressing plate, an electromagnetic generating cavity is formed in the cooling water jacket, and a plurality of electromagnetic coils are mounted in the electromagnetic generating cavity; a cooling coil is mounted in the internal cavity of the cooling copper sleeve, one end of the cooling coil penetrates through an outer sleeve of the cooling copper sleeve and is connected with a gas inlet and an inert gas source, and the other end of the cooling coil sequentially passes through an inner sleeve of the cooling copper sleeve and the graphite jacket and is connected with a gas outlet. The gas-protected crystallizer has the advantages that liquid metal can be subjected to flow and heat-mass transfer in the internal cavity of the crystallizer, which is adopted for the horizontal continuous casting, through the electromagnetic stirring effect of the electromagnetic generator, so that crystal grains are refined, solidified tissue is finer, and the quality of cast blanks is improved; meanwhile, through a gas protecting system, attachments of the inside surface of the graphite jacket are reduced obviously and are more disperse relatively, and the service life of the graphite jacket is prolonged by 50% compared with that of the original graphite jacket.

Description

Horizontal continuous casting of copper gas shield crystallizer
Technical field
The present invention relates to copper-alloy pipe-material production equipment field, be specifically related to a kind of horizontal continuous casting of copper gas shield crystallizer.
Background technology
Copper pipe and copper alloy tube are the critical materials of the heat-exchange system in desalinization, thermoelectricity nuclear power and naval vessel.Production of copper compo pipe at present, main method is extrusion, adopts alternate manner to bore a hole as oblique casting, and continuous casting rolls and draws seldom, extrusion process production process is: first batching casting circle base, through sawing, sorting, heating, extruding, pickling, then through rolling, be stretched to production tube, its defect is: (1) production process is numerous and diverse, and auxiliary equipment is many, maintenance die expense is high, floor space is large, and personnel require many, and competency profiling is high; (2) scale of investment is large, more than one hundred million units at least, several hundred million yuan at most; (3) justify base post bake, need extrusion modling, recipient, pin, need the energy consumptions such as preheating high before work; (4) the operation metal losses such as stirring, ingot casting, sawing, heating, pressure are remaining, decortication, pickling are large, and yield rate is low, for base yield rate <90%; (5) adopt single-unit furnace semi-continuous casting or the founding of split stove, continuous production is poor, and efficiency is low; (6) zinc scaling loss is large, stir, and post bake, extruding and the smog such as lubricated are large, seriously polluted; (7) pipe is eccentric large, affects follow-up cold working, and especially the extrusion yield of the large-caliber thin-walled brass tube of forward extrusion is 40%~60%.Generally speaking the technique of China's copper base copper alloy tube falls behind at present, and the quality of product is stable not, yield rate is low and cost is high.Horizontal casting is a kind of method of continuous casting, its principle is to utilize the principle of molten metal crystallisation by cooling, from the metal of melting or alloy molten solution, slowly extract continuously the effigurate solid metallic wire rod of tool or sheet material out, its advantage is that production capacity is large continuously without courses of work such as process extruding, rolling, drawings; Crystallisation by cooling system is a key equipment of horizontal casting, in cooling procedure molten metal be heated inhomogeneous, near a side cooling velocity of water jacket fast and away from a cooling velocity slow, cause pipe appearance to have crackle, solidified inside to organize thick defect.In condenser pipe market, HSn70-1 and Ha177-2 brass tube, BFe10-1-1 and the application of Bfe30-1-1 White Copper Tubes are many, if wherein HSn70-1 and Ha177-2 brass tube adopt horizontal casting, along with the solidification shrinkage of metal, liquid metals on graphite mo(u)ld by only depending on graphite wall to shrinking certain gap, there is alloying component in brass also to contain more zinc, and the fusing point of zinc is lower, the intra-zone solidifying at liquation divides zinc to volatilize to condense on crystallizer graphite mo(u)ld, extraneous air easily penetrates into gap from the port of export of pipe, and first metallic zinc of solidifying reacts with graphite mo(u)ld, thereby generating oxide sticks in graphite wall, increase the frictional force of pipe pull-out, and affect heat-transfer effect, greatly shorten the service life of graphite template, and along with production is carried out, the oxide of adhesion is more and more, in the time of pipe cast, easily makes pipe occur crackle with frozen metal while contact, inner or surperficial if oxide shedding is embedded in pipe, can destroy the ductility of matrix.
Summary of the invention
Object of the present invention is exactly the defect existing for prior art, and the horizontal continuous casting of copper gas shield crystallizer of the good and long service life of a kind of crystallization effect is provided.
The concrete technical scheme of the present invention is: comprise outside graphite overcoat and inner graphite centre rod, and graphite overcoat and graphite centre rod form annular inner chamber; The bottom of graphite overcoat is provided with inlet, and graphite overcoat middle part is up set with pressing plate, flange and cooling copper sheathing successively; Between described pressing plate and graphite overcoat, be provided with the refractory material protective sleeve that 15-20mm is thick; Described pressing plate inner side is provided with cooling jacket, is provided with electromagnetism generation cavity in cooling jacket, and multiple solenoids are installed in electromagnetism generation cavity, and solenoid is connected with three phase mains, and the yoke that permeability magnetic material is made is equipped with in the outside of solenoid; Described pressing plate and flange are austenitic stainless steel; The power frequency of described three phase mains is 50Hz, and current strength is 85-95A; Described graphite centre rod is that tapering is the round platform of 1.2-1.4; The inner chamber of described cooling copper sheathing is installed cooling coil, cooling coil one end through cooling copper sheathing overcoat be connected with air inlet, the other end passes successively cooling copper sheathing inner sleeve, graphite overcoat and is connected with gas outlet, and the inwall of the Way out of described gas outlet and described graphite overcoat is tangent, and the Way out axis of gas outlet and the axis angle of graphite overcoat are less than 90 °; Described air inlet connects inert gas source of the gas.
Such scheme can further be improved to:
In described cooling copper sheathing, be provided with spaced apart deflection plate.
Described refractory material protective sleeve is silicon carbide brick, corundum brick protective sleeve or fire clay cover.
The inner surface of described graphite overcoat and the roughness of graphite centre rod outer surface are below 0.5.
Described cooling jacket is stainless steel cooling jacket.
In described electromagnetism generation cavity, be provided with the poly-magnet frame of annular.
Described austenitic stainless steel is preferably 1Cr17Mn6Ni15N, 0Cr18Ni10Ti or 1Cr18Ni12Mo3Ti.
The Way out axis of described gas outlet and the axis angle of graphite overcoat are 45-60 °.
Described inert gas source of the gas is nitrogen or argon gas source of the gas.
On described source of the gas, also connect cushion chamber, its internal interval is installed cushioning fender.
Compared with prior art, the crystallizer that horizontal casting method in the present invention adopts has been installed electromagnetic generator, by electromagnetic agitation effect, makes metal liquid in crystallizer internal cavity, can occur to flow and heat and mass, thereby reach crystal grain thinning and make solidified structure thinner, improve the quality of strand; Experimental verification simultaneously, by gas protection system, the attached crop of graphite overcoat inner surface obviously reduces, and relatively will disperse, and extended 50% than original the service life of graphite overcoat.
Accompanying drawing explanation
Fig. 1 is the structural representation of an embodiment of the present invention;
Fig. 2 is the A-A cutaway view in Fig. 1;
In figure: 1, inlet, 2, graphite overcoat, 3, pressing plate; 4, deflection plate, 5, cooling copper sheathing, 5.1, cooling copper sheathing inner sleeve; 5.2, cooling copper sheathing overcoat, 6, hollow bloom, 6.1, liquid segment; 6.2, the section of solidifying partly, 6.3, the section of solidifying, 7, graphite centre rod; 8, flange, 9, yoke, 10, solenoid; 11, refractory material protective sleeve; 12, inner chamber, 13, cooling coil, 13.1, air inlet; 13.2, gas outlet; 14, stainless steel cooling jacket, 15, electromagnetism generation cavity, 16, cushion chamber; 17, cushioning fender, 18, gap.
The specific embodiment
Below in conjunction with accompanying drawing, the present invention is described further.
Referring to Fig. 1, a kind of horizontal continuous casting of copper gas shield crystallizer, comprises outside graphite overcoat 2 and inner graphite centre rod 7, and graphite overcoat 2 and graphite centre rod 7 form annular inner chamber 12; The bottom of graphite overcoat 2 is provided with inlet 1, and graphite overcoat 2 middle parts are up set with pressing plate 3, flange 8 and cooling copper sheathing 5 successively, is provided with spaced apart deflection plate 4 in cooling copper sheathing; Between pressing plate 3 and graphite overcoat 2, be provided with the refractory material protective sleeve 11 that 15-20mm is thick, refractory material protective sleeve is preferably silicon carbide brick, corundum brick protective sleeve or fire clay cover; Pressing plate 3 inner sides are provided with stainless steel cooling jacket 14, in stainless steel cooling jacket 14, be provided with electromagnetism generation cavity 15, the multiple solenoids 10 of the interior installation of electromagnetism generation cavity 15, solenoid 10 is connected with power supply, the yoke 9 that permeability magnetic material is made is equipped with in the outside of solenoid 10, and yoke can be made of pure iron; Pressing plate 3 and flange 8 are austenitic stainless steel, austenitic stainless steel is preferably 1Cr17Mn6Ni15N, 0Cr18Ni10Ti or 1Cr18Ni12Mo3Ti, experimental results show that when pressing plate and flange are selected above weak magnetic conduction or non-magnetic material, the magnetic line of force being absorbed is minimum, and the magnetic induction intensity of electromagnetic generator weakens minimum; The power frequency of power supply is 50Hz, and current strength is preferably 85-95A, and current strength is too high, and the joule heat that induced-current produces is excessive, causes part forming core core heavily to be melted, and the refining effect of solidified structure is suppressed, and solidified structure starts chap; The round platform that graphite centre rod 7 is 1.2-1.4 for tapering, tapering round platform is to shrink coated graphite centre rod and increasing friction force for fear of drawing pipe in process of billet withdrawal.The roughness of the inner surface of graphite overcoat 2 and graphite centre rod 7 outer surfaces is below 0.5.The inner chamber of cooling copper sheathing 5 is installed cooling coil 13, cooling coil 13 one end are connected with air inlet 13.1 through cooling copper sheathing overcoat 5.2, the other end is successively through cooling copper sheathing inner sleeve 5.1, graphite overcoat 2 is connected with gas outlet 13.2, and the inwall of the Way out of described gas outlet 13.2 and described graphite overcoat 2 is tangent, and the Way out axis of gas outlet 13.2 and the axis angle of graphite overcoat 2 are less than 90 °, be preferably 45-60 °, for fear of the air-flow of gas, liquation being solidified to (be mainly liquid segment 6.1 and partly the section of solidifying 6.2) impacts, cause pipe surface to occur defect, the outlet of gas outlet 13.2 should be pointed to the pipe section of solidifying 6.3, in this region because liquation solidifies, the air-flow that flow and pressure are lower can not exert an influence to pipe, " inwall of the Way out of gas outlet 13.2 and described graphite overcoat 2 is tangent, and the Way out axis of gas outlet 13.2 and the axis angle of graphite overcoat 2 are less than 90 °, be preferably 45-60 ° ", " tangent " object is directly to blow to pipe in order to reduce air-flow as far as possible, inert gas is moved around pipe, in addition " angle is less than 90 ° " is for gas spiral is moved to the outlet of crystallizer around pipe, reduce inner liquid segment 6.1 and the partly impact of the section of solidifying 6.2, also be more conducive to emptying air simultaneously.Air inlet 13.1 connects inert gas source of the gas, and inert gas source of the gas is nitrogen or argon gas source of the gas.On source of the gas, can also connect cushion chamber 16, its internal interval is installed cushioning fender 17, and the object of cushion chamber 16 is in order to cushion the air-flow from source of the gas, makes its mild crystallizer that enters.
The course of work of the present invention is: the bottom that by pressing plate 3 and flange 8, this device is fixed on to holding furnace, the inlet 1 of graphite overcoat 2 is immersed under molten metal liquid level, in cooling copper sheathing 5, stainless steel cooling jacket 14, pass into cooling water, opening power, now molten metal enters inner chamber 12, connect inert gas source of the gas, can under draw-gear draw, form continuous pipe.Yoke 9 can strengthen the electromagnetic field that solenoid 10 produces, and yoke material can be selected pure iron.Cooling water in stainless steel cooling jacket 14 can prevent the long-time high-temperature baking of solenoid 10 and damage.
Embodiment 2
In order to reduce leakage field, improve the magnetic induction intensity in working region simultaneously, in electromagnetism generation cavity 15, be also provided with the poly-magnet frame of annular.
For those skilled in the art, under the premise without departing from the principles of the invention, likely to concrete size, or partial structurtes make some improvements and modifications, and these improvements and modifications also should be considered as protection scope of the present invention.

Claims (9)

1. a horizontal continuous casting of copper gas shield crystallizer, is characterized in that: comprise outside graphite overcoat (2) and inner graphite centre rod (7), and graphite overcoat (2) and graphite centre rod (7) form annular inner chamber (12); The bottom of graphite overcoat (2) is provided with inlet (1), and graphite overcoat (2) middle part is up set with pressing plate (3), flange (8) and cooling copper sheathing (5) successively; Between described pressing plate (3) and graphite overcoat (2), be provided with the refractory material protective sleeve (11) that 15-20mm is thick; Described pressing plate (3) inner side is provided with cooling jacket (14), in cooling jacket (14), be provided with electromagnetism generation cavity (15), multiple solenoids (10) are installed in electromagnetism generation cavity (15), solenoid is connected with three phase mains, and the yoke (9) that permeability magnetic material is made is equipped with in the outside of solenoid (10); Described pressing plate (3) and flange (8) are austenitic stainless steel; The power frequency of described three phase mains is 50Hz, and current strength is 85-95A; The round platform that described graphite centre rod (7) is 1.2-1.4 for tapering; The inner chamber of described cooling copper sheathing (5) is installed cooling coil (13), cooling coil (13) one end through cooling copper sheathing overcoat (5.2) be connected with air inlet (13.1), the other end passes successively cooling copper sheathing inner sleeve (5.1), graphite overcoat (2) and is connected with gas outlet (13.2), and the inwall of the Way out of described gas outlet (13.2) and described graphite overcoat (2) is tangent, and the axis angle of the Way out axis of gas outlet (13.2) and graphite overcoat (2) is less than 90 °; Described air inlet (13.1) connects inert gas source of the gas.
2. horizontal continuous casting of copper gas shield crystallizer according to claim 1, is characterized in that: in described cooling copper sheathing (5), be provided with spaced apart deflection plate (4).
3. horizontal continuous casting of copper gas shield crystallizer according to claim 2, is characterized in that: described refractory material protective sleeve is silicon carbide brick, corundum brick protective sleeve or fire clay cover; The roughness of the inner surface of described graphite overcoat (2) and graphite centre rod (7) outer surface is below 0.5.
4. horizontal continuous casting of copper gas shield crystallizer according to claim 3, is characterized in that: described cooling jacket (14) is stainless steel cooling jacket.
5. according to the arbitrary described horizontal continuous casting of copper gas shield crystallizer of claim 1-4, it is characterized in that: described electromagnetism generation cavity (15) is provided with the poly-magnet frame of annular.
6. according to the arbitrary described horizontal continuous casting of copper gas shield crystallizer of claim 1-4, it is characterized in that: described austenitic stainless steel is preferably 1Cr17Mn6Ni15N, 0Cr18Ni10Ti or 1Cr18Ni12Mo3Ti.
7. horizontal continuous casting of copper gas shield crystallizer according to claim 6, is characterized in that: the Way out axis of described gas outlet (13.2) and the axis angle of graphite overcoat (2) are 45-60 °.
8. horizontal continuous casting of copper gas shield crystallizer according to claim 6, is characterized in that: described inert gas source of the gas is nitrogen or argon gas source of the gas.
9. horizontal continuous casting of copper gas shield crystallizer according to claim 6, is characterized in that: on described inert gas source of the gas, also connect cushion chamber (16), its internal interval is installed cushioning fender (17).
CN201320873591.4U 2013-12-29 2013-12-29 Gas-protected crystallizer for horizontal continuous casting of copper tubes CN203610629U (en)

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Cited By (8)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN103658572A (en) * 2013-12-29 2014-03-26 山东亨圆铜业有限公司 Copper pipe horizontal continuous casting gas shield crystallizer and method for preparing copper alloy pipe through copper pipe horizontal continuous casting gas shield crystallizer
CN105344953A (en) * 2015-12-15 2016-02-24 德阳九鼎智远知识产权运营有限公司 Cooling structure with baffling for inner annular surface of continuous casting crystallizer
CN105344954A (en) * 2015-12-15 2016-02-24 德阳九鼎智远知识产权运营有限公司 Segmentable cooling structure with baffling for inner annular surface of continuous casting crystallizer
CN105364034A (en) * 2015-12-15 2016-03-02 德阳九鼎智远知识产权运营有限公司 Segmented cooling structure with baffling function for inner loop surface of continuous casting crystallizer
CN105364038A (en) * 2015-12-15 2016-03-02 德阳九鼎智远知识产权运营有限公司 Segmented cooling structure for inner loop surface of continuous casting crystallizer
CN105364037A (en) * 2015-12-15 2016-03-02 德阳九鼎智远知识产权运营有限公司 Cooling structure for inner loop surface of the continuous casting crystallizer
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
CN110732648A (en) * 2019-10-31 2020-01-31 杭州富通电线电缆有限公司 Manufacturing process of copper rods

Cited By (9)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN103658572A (en) * 2013-12-29 2014-03-26 山东亨圆铜业有限公司 Copper pipe horizontal continuous casting gas shield crystallizer and method for preparing copper alloy pipe through copper pipe horizontal continuous casting gas shield crystallizer
CN105344953A (en) * 2015-12-15 2016-02-24 德阳九鼎智远知识产权运营有限公司 Cooling structure with baffling for inner annular surface of continuous casting crystallizer
CN105344954A (en) * 2015-12-15 2016-02-24 德阳九鼎智远知识产权运营有限公司 Segmentable cooling structure with baffling for inner annular surface of continuous casting crystallizer
CN105364034A (en) * 2015-12-15 2016-03-02 德阳九鼎智远知识产权运营有限公司 Segmented cooling structure with baffling function for inner loop surface of continuous casting crystallizer
CN105364038A (en) * 2015-12-15 2016-03-02 德阳九鼎智远知识产权运营有限公司 Segmented cooling structure for inner loop surface of continuous casting crystallizer
CN105364037A (en) * 2015-12-15 2016-03-02 德阳九鼎智远知识产权运营有限公司 Cooling structure for inner loop surface of the continuous casting crystallizer
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
CN110732648A (en) * 2019-10-31 2020-01-31 杭州富通电线电缆有限公司 Manufacturing process of copper rods
CN110732648B (en) * 2019-10-31 2021-05-11 杭州富通电线电缆有限公司 Manufacturing process of copper rod

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Granted publication date: 20140528

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