CN85103853A - The method of continuous metal tube casting, equipment and products thereof - Google Patents
The method of continuous metal tube casting, equipment and products thereof Download PDFInfo
- Publication number
- CN85103853A CN85103853A CN85103853.0A CN85103853A CN85103853A CN 85103853 A CN85103853 A CN 85103853A CN 85103853 A CN85103853 A CN 85103853A CN 85103853 A CN85103853 A CN 85103853A
- Authority
- CN
- China
- Prior art keywords
- liquid metal
- force
- crystallizer
- field
- electromagnetic
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Expired - Lifetime
Links
Images
Abstract
By liquid metal being introduced the bottom of annular crystallizer, cast out the tubular metal product of the length of densification such as metal tube and homogeneous continuously.Have at least one extension on move the drop-down liquid metal of situation in the alternate electromagnetic floatage field and an auxiliary Electromagnetic Control field of force, the tubulose liquid metal is in when solidifying under essentially no gravity and the stress-free state.Solidified tubular metal product is pulled out from the top in magnetic field, and cooling also further is processed into desired end product.
Description
The present invention relates to a kind of new improvement method, equipment and the final products of tubular metal product such as continuous casting of metal pipe.
Or rather, the present invention relates to a kind of method that under the situation that the electromagnetic suspension field of force is arranged, casts long tubular metal product such as metal tube continuously.Under the situation that the electromagnetic suspension field of force is arranged, cast, can make the gravity, frictional force and the adhesion strength that act on the liquid metal cast tube product reduce to minimum, and make the tubulose liquid metal of product in process of setting and the heat exchanger effectiveness between the heat exchanger keep maximum.
In the past, the tubular metal product that occurs with forms such as metal tubes is to produce with the various technology in being cast in that comprise.These technology have been done detailed explanation in the document of the relevant this respect technology of having published.For example, the United States Patent (USP) № 4 of promulgation on June 23rd, 1981,274,470 first hurdle and second hurdle about the description of prior art in just narrated and be applicable to the electromagnetic casting device of producing tubular metal product such as metal tube, and the some patents and the technical literature of prior art, and the shortcoming of these prior arts has been discussed.What be put into these prior arts has a United States Patent (USP) № 3,476,166(inventor Getselev), United States Patent (USP) № 3,605,865(inventor Getselev), United States Patent (USP) № 3,735,799(inventor Karison), United States Patent (USP) № 4,014,379(inventor Getselev) and United States Patent (USP) № 4,126,175(inventor Getselev) above-mentioned these patents relate to the use electromagnetic crystallizer, have in it one in given size with interior metal liquid core, when liquid core moved down, the part of liquid core lateral magnification was outside solidified gradually.Adopt this method, cakey metal extends longitudinally, if the metal base liquid core that the formation that relies on gravity that liquid metal is flow to descend is solidified above, liquid metal just can be sent in the mould semicontinuous or continuously.One of comparison important disadvantages of this method is the characteristic of the direct casting technology known to not having in the past " avoiding accident " of being had, therefore, just in case the power failure that generation does not reckon with etc., liquid metal may overflow the metal liquid core that is moving down, rather than resembles and only flow back to the direct casting system.In addition, in these following casting technology, excessive and the possibility of overflowing out of liquid metal flow, require carefully to control the speed that liquid metal sends into and the translational speed of cakey strand always, and these two kinds of speed all are subjected to strict restriction because of the heat exchange problem, and this has reduced this continuous casing possibility for commercial applications.
Transfer the United States Patent (USP) № 3,746 of Outokumpo oy of Holland, 077(inventor Lohikoski etc.) and United States Patent (USP) № 3,872,913, (inventor Lohikoshi) a kind of direct casting technology has been proposed.The characteristics that adopt this technology are that liquid metal upwards is pressed into by hydrostatic pressure or is upwards sucked by pull of vacuum in the mechanical type crystallizer of an opening, vertically arranged, new shaping.Adopt this method, chilled cast article disengages and shifts out with the upper end of mechanical type crystallizer unceasingly, and liquid metal is sent in the mechanical type crystallizer continuously.This system has the characteristic that desirable direct casting technology " is avoided accident ", but this point is with the heavy wear of the mechanical type crystallizer that contacted and tears to be cost.Therefore, this system is continuously with semicontinuous operation the time, and the mechanical type crystallizer was just ground away in very short time.So need a kind of continuous casting system of improved tubular metal product, to overcome the shortcoming of existing electromagnetic casting system.
Therefore, main purpose of the present invention provides a kind of new, that improved, that be used to make tubular metal product such as continuous, long metal pipe, continuous casing and equipment, and this method and apparatus has overcome above-mentioned known and the existing shortcoming and defect of foundry engieering applied continuous tubular metal product and system.
Characteristics of the present invention provide a kind of improved under the situation that an electromagnetic suspension field of force that moves up is arranged, make the method and apparatus of tubular metal product such as long metal pipe continuously.The electromagnetic suspension field of force that moves up makes to act on gravity casting, on the tubular metal product, and it is minimum that frictional force and adhesion strength reduce to, and simultaneously, the efficient that the tubular metal product of solidifying and the heat between the heat exchange product are handed over keeps maximum.
Implement the method and apparatus of producing long tubular metal product provided by the invention, the device that comprises the electromagnetic suspension field of force of, an alternation extension, that move up, and the device that forms its direction Electromagnetic Control power another arena vertical with the field of force that upwards suspends, common extension in order to form in the inside of annular crystallizer.In addition, the present invention also provides the device that forms the auxiliary selenoid field of force, so that form an auxiliary selenoid field of force at least, its action direction is opposite with the direction of aforementioned Electromagnetic Control power another arena in the annular crystallizer intermediate range.Liquid metal is admitted in the bottom and electromagnetic field of annular crystallizer, to form tubulose liquid metal post.The electromagnetic suspension field of force of setting up by suitable method on the tubulose liquid metal post of acting on makes the differential static pressure of metal column reduce to minimum, and the predetermined size relationship of maintenance between the relative inner peripheral surface of the surfaces externally and internally that makes tubulose liquid metal post and annular crystallizer.Act on the electromagnetic force field on the tubulose liquid metal post, the cross dimension that should make tubulose liquid metal post is even as big as realizing no pressure contact, but prevent between the relative inner circumferential surface of surfaces externally and internally of tubulose liquid metal post, to form real gap again with annular crystallizer, thereby, realize that no pressure contacts and obtain maximum thermal exchange between tubulose liquid metal post and the crystallizer, simultaneously, gravity, frictional force and adhesion strength are reduced to minimum.Tubulose liquid metal post is subjected to suspending power and solidifies in solidification zone in the solidification zone that heat exchanger surrounded, move up simultaneously, by the casting container after coagulation tubular metal product shift out from the top of crystallizer.
When continuous casting, liquid metal is sent into the bottom of crystallizer continuously, and cakey tubular metal goods shift out from the top of crystallization continuously with its speed of production, and the speed of production of tubular metal goods is determined with the speed that corresponding liquid metal is sent into crystallizer by the translational speed of the cakey tubular metal goods that control is shifted out from crystallizer top.
In the embodiment that the present invention recommends, the auxiliary Electromagnetic Control branch field of force is to be produced by the auxiliary selenoid suspension field of force that moves up that is arranged in the annular crystallizer centre bore.
When casting process begins, a starting metal tube links to each other with the tubulose liquid metal post that moves up by the suspension field of force, and they are to cool off and be solidified to the lower end of starting metal tube by the upper end that makes the tubulose liquid metal post in the suspension field of force to connect together.The invention provides and will start the device that riser and the tubular metal product of having solidified attached to it are upwards drawn with a certain speed, this speed has determined the productivity ratio of tubular metal product.Just carry out pre-cooledly after being exposed from crystallizer top by the tubular metal goods that drawn, subsequently, if necessary, make desired final finished at this point, and be cooled to environment temperature.If what casting was come out is exactly desired size, so, after the tubular metal goods expose from crystallizer top, just carry out pre-cooledly, then, further be cooled to environment temperature and store.
After having read being described in detail of back, connect consideration with accompanying drawing again, the present invention just there has been clearer understanding, just than being easier to estimate purpose of the present invention, feature and many advantages of following, in the accompanying drawings, each is opened among figure identical part and all uses same symbolic representation.
Fig. 1 be according to new improvement of the present invention the partial structurtes sketch of tubular metal product Casting Equipment.Marked the strength member of this equipment on the figure and the correlation between them when making tubular metal product.
Fig. 2 is by method of the present invention and has adopted the block diagram of the whole continuous casting system of equipment shown in Figure 1.
Serve as United States Patent (USP) №, 4 that topic deliver with " method of continuous casting of metal, equipment and product " November 8 nineteen eighty-three, 414,285(inventor Hugh RLowry and RobertTFrost, transferred General Electric Co. Limited), proposed method, equipment and the product of the long fine and close homogeneous solid metal bar of a kind of new continuous casting, this method is the bottom that liquid metal is sent into crystallizer under the situation of the alternate electromagnetic floatage field that moves up that extension is arranged.The present invention is a kind of improvement to patent № 4,414,285, has proposed a kind of principle patent № 4,414,285 and has expanded the method and apparatus of producing tubular metal product such as metal tube to.
Fig. 1 is that being applicable to according to the principle of the present invention and United States Patent (USP) № 4,414,285 of having improved produced the device structure sketch of long tubular metal product continuously.Equipment shown in Figure 1 has the liquid metal storage tank 10 of an annular, and liquid metal is sent to storage tank, comes out from storage tank in tubular metal product such as metal tube processing back.Much less, the liquid metal storage tank has suitable refractory material lining and makes metal protect the heating element heater for the treatment of liquid state.
Crystallizer/the heat exchanger 11 of annular is installed in the upper end of storage tank 10, and the former annular internal channel aligns with the hole of liquid metals storage tank 10 top respective shapes, and communicates.
Crystallizer/the heat exchanger 11 of annular has a columniform ceramic coat 12, and overcoat 12 puts in the circular passage on storage tank 10 tops, and supports thereon.Shape is installed on centre bores 14 tops of annular liquid metal storage tank 10 as cover 14 in the pottery of the cup put upside down, the annular crystallizer that the sidewall of cover and cylinder ceramic coat have constituted an extension jointly in the cup-shaped pottery, the liquid metal in the storage tank 10 promptly is frozen into tubular metal product such as desirable metal tube in this crystallizer.
A multistage winding 22 is pressed mode shown in Figure 1 on the outer wall of outer heat-exchanger 15.Multistage winding 22 for example can be made up of 12 windings in the space that is installed in around the ceramic coat 12, and make the axis approximate vertical of the mounting plane and the ceramic jacket 12 of each winding.Coil in the multistage winding 22 can be divided into three groups, receives different the going up mutually of polyphase source shown in Figure 2, produces an electromagnetic suspension field of force that moves up, this United States Patent (USP) of quoting in front 4, in 414,285, particularly in the explanation fully of having contrasted of its part relevant with Fig. 3.
Multistage winding 23 and multistage winding 22 are somewhat similar, and it is made up of each coil that is installed in the multistage winding on the plane vertical with the central shaft of cover 13 in the cup-shaped pottery of putting upside down.The coil of winding 23 is in the inner surface of the 18B of the cup-shaped interior heat exchanger of putting upside down 18.Electric current flows into multistage winding 23 through supply lines 24.Multistage winding is preferably excited by polyphase source, and producing an auxiliary interior electromagnetic force field that moves up, and these interior loop are linked to be a single-phase winding and also are fine, and this point will be explained below in more detail.But, in the embodiment that the present invention recommends, winding 23 is linked to be a polyphase windings in multistage, feed multiphase current through supply lines 24, produce an electromagnetic suspension field of force that moves up, the suspension electromagnetic force field homophase that moves up that it produces with multistage outer winding 22 basically.But interior winding 23 also produces a control another arena vertical with the electromagnetic suspension field of force that moves up, and the action direction of the control another arena that its action direction and outer winding 22 produce is opposite.
Fig. 2 illustrates multistage outer winding 22 and is connected on polyphase source and the controller 25, can control power output, these two kinds of controllers that controller all is existing ordinary construction separately by frequency controller 26 independent controlled frequencies with by power controller respectively.Equally, multistage interior winding 23 shown in Figure 1 is connected on interior winding power supply and the controller 28 by supply lines 24, independently power controller 31 of an independent frequency controller 29 and one is arranged, be used to control via controller 28 supply with multistage in the frequency and the size (power) of electric current of winding 23.As mentioned above, multistage in winding 23 can be connected into and be similar to the such polyphase windings of multistage outer winding 22, in this case, are the multiphase currents that can produce the electromagnetic suspension field of force that moves up through the electric current of supply lines 24 supplies by controller 28.The electromagnetic suspension field of force homophase that moves up that this field of force is preferably produced with multistage outer winding 22 basically, but the opposite control another arena, control another arena that has a, action direction vertical and multistage outer winding 22 to produce with the suspension field of force that moves up.
During operation, by the stove (not shown) melted metal flow into storage tank 10 through inlet 10A, be shifted out from storage tank 10 then, upwards enter the bottom of the annular crystallizer that upright the outer surface by cover 13 in the inner surface of ceramic coat 12 and the relative pottery constitutes.Equipment should be arranged like this: liquid metal 25 under the effect of gravity or topped inert gas, rise enter in the annular crystallizer between the ceramic wall of cover 12 and 13 liquid level just above winding outside multistage 22 and multistage in the lower end of winding 23.In the continued operation process, in order to keep the initial liquid level by the 12 and 13 annular crystallizer liquid metals that constitute, the liquid metal in the holding furnace should be interrupted or add continuously in the storage tank 10 as required.The effect that moves electromagnetic force field move on winding 22 produced outside liquid metal can be subjected to that the electromagnetic suspension field of force and interior winding 23 produce on this height on.No matter what winding 23 was produced in multistage only is a horizontal control force another arena, still one comprises on its action direction control branch field of force opposite with the suspension electromagnetic force field of multistage outer winding 22 generations compound and moves the electromagnetic suspension field of force, and liquid metal all will be subjected to above-mentioned effect.
When starting beginning, from inserting, the lower end of starting pipe and the upper end of the tubulose liquid metal post that the liquid metal by rising in the annular crystallizer forms are contacted by the upper end of 12 and 13 annular crystallizers that constitute.When cooling water passed through separate heat exchanger 15 and 18 fast, the tubulose liquid metal post 26 that contacts with the starting pipe can be solidified.Starting pipe and be attached at the tubular metal post 26 that has solidified on the starting pipe then will be by means of withdrawing roll shown in Figure 2, from by upwards pulling out 12 and 13 annular crystallizers that constitute.The starting pipe is pulled out with the speed that metal column forms with continuous tubular metal post 26 on the starting pipe, and this speed has determined the productivity ratio of this continuous casting system.Tubulose liquid metal post by multistage winding 22 and 23 length limited solidifies when solidifying in the zone, because the effect in the electromagnetic suspension field of force that is subjected to moving, and be in essentially no gravity and stress-free state, the detailed explanation of relevant this respect can be seen the United States Patent (USP) № 4 that quoted the front, 414,285.
In operating process, solidify tubulose liquid metal post in the zone during suspending according to the mode of narrating above, have a kind of beyond thought self regulating charactoristic of uniqueness.Because this self regulating charactoristic is arranged, if make the rate of climb quickening of tubulose liquid metal post greater than the gravity of liquid metal post owing to suspending power, then the area of section of metal column will reduce, and reduce to cause climbing power to reduce automatically by the area of section that bigger suspending power causes, then tubulose liquid metal post on the speed of moving will slow down automatically, so this is a self-stabilization and self-adjusting system.Conversely too, if slow down owing to suspending power reduces to make the tubulose liquid metal post rate of climb, then the cross-sectional area of tubulose liquid metal post will increase, and the increase of cross-sectional area increases the suspending power that acts on the metal column, thereby the rate of climb of tubulose liquid metal post is accelerated.Therefore, in the suspension zone (just liquid or solid-state tubular metal post is subjected to moving the zone of electromagnetic suspension force field) as can be seen, this system was exactly a self-adjusting system originally.As mentioned above, when this system moves, the tubulose liquid metal post that is solidifying is played the suspension supporting role, make it be in essentially no gravity and stress-free state.
Though whole effects in the electromagnetic suspension field of force work to the major part of solidifying tubular metal post liquid and solid-state in the zone, be in lower end and upper end (the suspension field of force at this two place on average has only about half of solidification zone mid portion) of solidifying the metal tube in the zone and supported by the pressure differential and the foregoing climbing power of transmitting by the starting pipe that make liquid metal rise to elemental height respectively.So, when tubulose liquid metal post is forming, the suspension field of force of lower end provides a little acceleration that makes progress, and when tubulose liquid metal post is moved upwards up to the mid portion in the zone that suspends, it promptly enters one by force to being enough to that metal column is in the suspension field of force of basic null-gravity state, is in essentially no pressure contact condition between the sidewall 12 and 13 of it and annular crystallizer.Owing to there is not pressure, the surfaces externally and internally of liquid metals post and looping crystallizer 12 and 13 against just there not being continuous pressure to contact between the surface of metal column basically, tubulose liquid metal post in critical solidification zone does not have hydrostatic pressure poor basically yet, in this critical zone, the gravity, frictional force and the adhesion strength that act on the metal column that is solidifying are reduced to minimum.
The interior diameter of design cylindrical ceramic overcoat 12 and cup-shaped in during the overall diameter of cylindrical dip portion of ceramic jacket 13, should make the surface of tubulose liquid metal post 26 and the gap minimum between ceramic jacket 12,13 apparent surfaces.In fact this annular gap is not a gap, but between the sidewall of the surface of tubular metal post and crystallizer brokenly or the gap that occurs randomly.Gap size is remained a very little value, is crucial for good heat exchange.Because this gap is too little, so on figure, be difficult to show.Yet, among Fig. 2 and Fig. 3 of the United States Patent (USP) № 4,414,285 that quoted as proof in front, attempted on figure, expressing the position in gap.But should remember that this expression is a kind of graphic expression of illustrating, rather than to the position in gap and the actual expression of size.This gap is at random and irregularly to occur, the existence in gap can be from final set the glossiness ripple outward appearance of tubular metal product obtain proof.If since on move the electromagnetic suspension field of force the control branch field of force make the gap become too big, then may significantly reduce the effective heat exchange between tubulose liquid metal post and ceramic jacket 12 and 13 opposite flanks, because the inverse relation of Cheng Qiang between the known field intensity and the coefficient of overall heat transmission.Therefore, the intensity in the suspension field of force should be adjusted at the very start casting process, keeps the gap of minimum to realize good heat exchange guaranteeing desirable no pressure contact, to resemble to stipulate above.Then field intensity is fixed as this setting, even and in casting process tubulose liquid metal post may change by the translational speed (linear velocity) of solidifying the zone, should not allow field intensity change yet.
Referring to Fig. 2, can see, after the tubular metal product of having solidified is pulled out from the pipe assembly upper end that suspends, after sending fore-cooling room 34 to, deliver to the hot-rolling mill 37 and 38 of two tandem configuration by withdrawing roll 35 and 36, cool off at last then, be sent to again and batch platform 39 and batch.Another kind of situation is, if the surface smoothness that the tubular metal product of having solidified 33 has suitable diameter and uses under as cast condition after then metal tube is pulled out by withdrawing roll 35 and 36 from fore-cooling room 34, is then sent to cooling and no longer further processing.
In operating process, casting speed (just tubulose liquid metal post is by the linear velocity of heat exchanger/levitation device 11) should be adjusted by control withdrawing roll 35 and 36 CD-ROM drive motor, withdrawing roll 35 and 36 and milling train 37 and 38 and coiling machine 39 synchronous.The intensity and the magnet excitation frequency of suspension field should determine that the magnitude range of suspension ratio is between 75% to 200% by the size and the resistance that calculate various casted tubular section metal products.In using practical methods of the present invention and system,, should start under the speed that be lower than normal line speed with under the suspending power that is higher than normal suspending power in order to guarantee reliable starting.After reaching stable mode of operation (in 2 to 3 minutes), linear velocity should progressively be increased by artificial adjustment, and the suspension field intensity should progressively reduce, up near maximum Foundry Production rate.The Foundry Production rate is represented with the tonnage of the solid tubular metal product of per hour being cast by liquid metal.Afterwards, this system just keeps this state in operating process.Under normal circumstances, in order to guarantee to produce smoothly, should monitor the temperature of the tubular metal product that has solidified that floats out, its method is with the naked eye or is in the temperature of the foundry goods in the annular crystallizer with pyrometer mensuration.
Industrial usability
The new method of the tubular metal product such as continuous casting of metal pipe in the electromagnetic suspension field of force that the present invention proposes and equipment have the value of employing. The electromagnetic suspension field of force has reduced the needed power of this series products of casting greatly, thereby has greatly reduced to be generally used for casting the machinery wearing and tearing of this series products and tearing.
After the tubular metal product of having narrated method of the present invention, equipment and having produced according to the present invention, can believe that obviously according to top said content, the scheme that also has other improvement of the present invention and conversion offers the professional and technical personnel. In additional claim, comprise the present invention's reform to each concrete scheme in whole specified scopes.
Claims (20)
1, produce the method for long tubular metal product, it is characterized in that comprising the following steps: in the inner surface of annular crystallizer, forming an extension on move alternate electromagnetic floatage field; Cause one with on move the Electromagnetic Control field of force of the vertical co-extensive in the electromagnetic suspension field of force; At least produce its action direction auxiliary selenoid control another arena opposite with control above-mentioned another arena at the center of annular crystallizer; Liquid metal is sent in the bottom and electromagnetic force field of annular crystallizer, to form tubulose liquid metal post; Determine to act on the size in the electromagnetic suspension field of force on the tubulose liquid metal post, the hydrostatic pressure difference that acts on the metal column is reduced to minimum, and between the relative inner circumferential surface of surfaces externally and internally of tubulose liquid metal post, keep predetermined size relationship with annular crystallizer; The size that keeps electromagnetic force field, the cross section that makes tubulose liquid metal post is even as big as realizing no pressure contact, but can prevent between the relative inner circumferential surface of surfaces externally and internally of tubulose liquid metal post, to form bigger gap with annular crystallizer, thereby when realizing between tubulose liquid metal post and the crystallizer that no pressure contact and obtains the heat exchange of maximum, make gravity, frictional force and adhesion strength reduce to minimum; Tubulose liquid metal post is moved up by crystallizer; Metal column is solidified, on one side upwards by crystallizer and electromagnetic force field on one side; The top of cakey tubular metal product from crystallizer is shifted out.
2, the method that casts continuously according to claim 1, it is characterized in that liquid metal sent into the bottom of crystallizer continuously, cakey tubular metal product is shifted out from described crystallizer top continuously, and the productivity ratio of tubular metal product is by the speed controlling cakey metal product and be shifted out from crystallizer top and control corresponding liquid metal and be admitted to the speed of crystallizer bottom and determined; The auxiliary selenoid control branch field of force is to move the generation of the electromagnetic suspension field of force by acting on assisting in the annular crystallizer centre bore.
3, method according to claim 2, it is characterized in that tubulose liquid metal post extends upward under weightless substantially situation passes through electromagnetic field, thereby be in tubular metal post in the electromagnetic field, on its most of length, there is not differential static pressure basically, the intensity of electromagnetic field is regulated to such an extent that can keep predetermined size relationship between the inner circumferential surface of the surfaces externally and internally of tubulose liquid metal post and annular crystallizer, make the size in the cross section of tubulose liquid metal post keep to prevent the numerical value that the continuous pressure of generation contacts between the inner circumferential surface of the surfaces externally and internally of tubulose liquid metal post and annular crystallizer, simultaneously, basically there is not the feasible gravity that acts on the tubular metal post that is solidifying of differential static pressure, it is minimum that frictional force and adhesion strength reduce to, and do not weaken crystallizer and be in the heat exchange of solidifying between the tubular metal post that is solidifying in the zone.
4, according to the method for claim 3, it is characterized in that a step as the process incipient stage, a starting metal tube is linked on the tubulose liquid metal post that moves up by electromagnetic force field, and the upper end cooling by making the tubulose liquid metal post in the electromagnetic force field and solidifying, and its lower end with the starting metal tube is moved up.
5, product according to the method for claim 1, be that a chemical analysis and diameter are even basically, fine and close even metal pipe with flash of light corrugated surface, its production method is sent into liquid metal the bottom of moving the electromagnetic suspension field of force and the coefficient Electromagnetic Control field of force in the extension, make liquid metal solidification, the tubulose liquid metal post that will solidify the zone simultaneously remains under the state of the differential static pressure minimum that can make liquid metal, and size relationship predetermined between the periphery of the surfaces externally and internally of tubulose liquid metal post and annular crystallizer remained such numerical value: form real gap between the circumferential surface of the cross dimension of tubulose liquid metal post even as big as the surfaces externally and internally that prevents tubulose liquid metal column and annular crystallizer, thereby, when obtaining available heat exchange maximum between tubulose liquid metal post and the crystallizer, make gravity, it is minimum that frictional force and adhesion strength reduce to; Therefore the liquid metal post upwards is pulled through the electromagnetic suspension field of force and the coefficient control field of force, is stirred and solidifies gradually.
6, tubular metal product continuous casting equipment is characterized in that comprising an annular crystallizer that is used to receive the vertically installed elongation that the solidifying liq metal uses; Liquid metal is delivered to the bottom of annular crystallizer, and form the device of tubulose liquid metal post; Link to each other, be used to cool off and solidify the heat-exchange device of tubulose liquid metal post with crystallizer; The device that cakey tubular metal product is shifted out from crystallizer top; Along a part of length of annular crystallizer around crystallizer, in order to produce the device in the main electromagnetic suspension field of force; Be arranged in the annular crystallizer intracardiac, in order to produce the device in the auxiliary selenoid field of force, it produces its force direction auxiliary selenoid control branch field of force opposite with the Electromagnetic Control field of force direction that is produced by above-mentioned main electromagnetic suspension field of force generation device at least, the device in the above-mentioned generation electromagnetic force field and the auxiliary selenoid field of force is used to reduce the hydrostatic pressure difference of tubulose liquid metal post, and keeps the preliminary dimension relation between tubulose liquid metal post surfaces externally and internally and the annular crystallizer; Keeping the size in the electromagnetic suspension field of force and the control field of force is the device of a certain numerical value, the cross dimension that it makes tubulose liquid metal post forms real gap even as big as preventing between the periphery of the surfaces externally and internally of tubulose liquid metal post and annular crystallizer, thereby, the efficient maximum that makes the heat exchange between tubulose liquid metal post and the crystallizer also makes gravity, frictional force and adhesion strength reduce to minimum simultaneously; With the above-mentioned electromagnetic suspension field of force and irrelevant being used to of the control field of force generation device tubulose liquid metal is moved up by the device of crystallizer; The device that cakey tubular metal product is shifted out from crystallizer top.
7, according to the equipment of claim 6, it is characterized in that auxiliary selenoid field of force generation device also has the generation device in an electromagnetic suspension field of force, and the generation device in main and auxiliary two electromagnetic suspension field of forces all has a multistage electromagnetism winding of receiving on the polyphase source continuous phase, in order to produce the alternating electromagnetism field of force of moving on.
8, according to the equipment of claim 7, also has a crucible that holds the liquid metal groove that links to each other with annular crystallizer, and link to each other with this crucible, in order to set up tubulose liquid metal post and it upwards moved in the annular crystallizer to the device of a certain height that is higher than the lower end that is main electromagnetic suspension field of force generation device at least.
9, equipment according to Claim 8 is characterized in that polyphase source is a threephase generator, its assist out power and frequency can adjust produce type and size that are suitable for the metal product cast evenly and to being much of move the electromagnetic suspension field of force.
10, according to the equipment of claim 9, when the equipment of being included in begins to start, in order to connect the device of metal riser and tubulose liquid metal post, the method that connects is, make the following end in contact of a metal riser also be in the upper end of the tubulose liquid metal post that solidifies in the zone, make tubulose liquid metal post be solidified to the lower end of riser subsequently; Draw the device of riser and cakey tubular metal post attached thereto with the speed of productivity ratio of decision tubular metal product.
11,, comprise the cakey tubular metal product of coming out from crystallizer top is carried out pre-cooled device according to the equipment of claim 10; Product is rolled down to the device of desired size; Rolling intact product is cooled to the device of environment temperature.
12,, also comprise the cakey tubular metal product of coming out from crystallizer top is carried out pre-cooled device according to the equipment of claim 10; The device that further is cooled to environment temperature through pre-cooled tubular metal product.
13,, it is characterized in that auxiliary selenoid control another arena generation device has the generation device in a single-phase electromagnetic control branch field of force, in order to produce an Electromagnetic Control branch field of force that externally acts on the tubulose liquid metal post according to the equipment of claim 6.
14, according to the equipment of claim 13, when the equipment of being included in begins to start, in order to connect the device of metal riser and tubulose liquid metal post, the method that connects is to make the following end in contact of a metal riser also be in the upper end of solidifying the tubular liquid metal post in the zone, make tubulose liquid metal post be solidified to the lower end of riser subsequently, draw riser and cakey tubular metal column device attached thereto with the speed of the productivity ratio of decision tubular metal product.
15, produce the continuous casing of long tubular metal product, may further comprise the steps: form a tubulose liquid metal post; Make tubulose liquid metal post enter solidification zone; Make most of length of the metal column that is in the solidification zone be subjected to electromagnetic suspension effect and Electromagnetic Control effect simultaneously by electromagnetic action, the size relationship of being scheduled between the circumferential surface with the hydrostatic pressure difference that reduces metal column and the outer surface of setting up the tubulose liquid metal and casting container, the size that keeps the electromagnetic suspension field of force and the Electromagnetic Control field of force, the size in cross section that makes tubulose liquid metal post is even as big as forming real gap between the circumferential surface of the surfaces externally and internally that prevents tubulose liquid metal post and crystallizer, thereby realize that tubulose liquid metal post contact with no pressure between the crystallizer and the heat exchange of maximum, gravity, it is minimum that frictional force and adhesion strength reduce to simultaneously; Cakey tubular metal product is pulled out from the solidification zone that is subjected to the electromagnetic force field effect.
16, method according to claim 15, the most of length that it is characterized in that the tubulose liquid metal post in the solidification zone is under the electromagnetic force field effect, between the circumferential surface of the surfaces externally and internally of this metal column and crystallizer, keep a predetermined size relationship, thereby make tubulose liquid metal post be in no pressure contact condition, and prevent that real continuous pressure occurring between the circumferential surface of the surfaces externally and internally of tubulose liquid metal post and crystallizer contacts, this metal column does not have hydrostatic pressure poor basically, thereby the gravity on the metal column that acts in solidifying, it is minimum that frictional force and adhesion strength reduce to, and don't weaken crystallizer significantly and the tubular metal post that solidifying between heat exchange.
17, according to the method for claim 16, it is characterized in that tubulose liquid metal post forms and enter solidification zone continuously, cakey tubular metal product is used to be different from the method for above-mentioned suspension electromagnetic force field, from solidification zone, shift out continuously, and control the productivity ratio of cakey tubular metal product with this.
18, according to the tubular metal product of solidifying of the explained hereafter of claim 17, this product solidifies acting on tubulose liquid metal post and stir in the suspension electromagnetic force field of this metal column, simultaneously again not with casting container continuously pressure contact, thereby have luminous corrugated surface.
19,, it is characterized in that the frequency of moving the suspension electromagnetic force field surpasses 1000Hz according to the method for claim 17.
20, according to the method for claim 17, it is characterized in that the intensity of the suspension electromagnetic field that moves is set up by the type and the size of the metal product of being cast, the liquid metal of per unit length is provided 75% to 200% suspending power of weight.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 85103853 CN1013936B (en) | 1985-05-11 | 1985-05-11 | Continuous metal tube casting method, apparatus and product |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 85103853 CN1013936B (en) | 1985-05-11 | 1985-05-11 | Continuous metal tube casting method, apparatus and product |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN85103853A true CN85103853A (en) | 1986-11-05 |
| CN1013936B CN1013936B (en) | 1991-09-18 |
Family
ID=4793480
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN 85103853 Expired CN1013936B (en) | 1985-05-11 | 1985-05-11 | Continuous metal tube casting method, apparatus and product |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN1013936B (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN106378427A (en) * | 2016-12-05 | 2017-02-08 | 佛山市承安铜业有限公司 | Crystallizer with pre-cooling function and pre-cooling method used for copper crystallizing process |
-
1985
- 1985-05-11 CN CN 85103853 patent/CN1013936B/en not_active Expired
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN106378427A (en) * | 2016-12-05 | 2017-02-08 | 佛山市承安铜业有限公司 | Crystallizer with pre-cooling function and pre-cooling method used for copper crystallizing process |
Also Published As
| Publication number | Publication date |
|---|---|
| CN1013936B (en) | 1991-09-18 |
Similar Documents
| Publication | Publication Date | Title |
|---|---|---|
| EP0114988B1 (en) | Continuous metal casting method | |
| Emley | Continuous casting of aluminium | |
| CN102380588B (en) | Intermediate-frequency induction and directional solidification ingot casting process and equipment utilizing same | |
| CA1186474A (en) | Process and apparatus for electromagnetically casting or reforming strip materials | |
| JPS6143146B2 (en) | ||
| US6773829B2 (en) | Method for casting molten metal, apparatus for the same, and cast slab | |
| US4865116A (en) | Continuous metal tube casting method and apparatus | |
| JPS6116215B2 (en) | ||
| CN1275724C (en) | Multifunction cold crucible electromagnetic precision shaping and directional solidification device | |
| CN85103853A (en) | The method of continuous metal tube casting, equipment and products thereof | |
| EP0168693B1 (en) | Continuous metal tube casting method, apparatus and product | |
| JP3199382B2 (en) | Manufacturing method and apparatus for semi-finished products | |
| JPS63273553A (en) | Method and apparatus for producing hollow billet | |
| US5279353A (en) | Method and apparatus to effect a fine grain size in continuous cast metals | |
| US3746070A (en) | Method for improving continuously cast strands | |
| US4770724A (en) | Continuous metal casting method and apparatus and products | |
| CA1279172C (en) | Continuous metal tube casting method, apparatus and product | |
| US5123476A (en) | Continuous metal tube casting method and apparatus using inner solenoid coil | |
| US4709749A (en) | Continuous metal casting apparatus | |
| JPS6333153A (en) | Cast starting method for multi-connecting electromagnetic casting | |
| JP2003340553A (en) | Continuous casting method for magnesium alloy sheet | |
| US4719965A (en) | Continuous metal casting method | |
| JPS62107844A (en) | Mold for continuous casting billet | |
| GB2275634A (en) | Metal casting employing electromagnetic levitation | |
| RU2009005C1 (en) | Method of producing sheet slab from aluminium and its alloys |
Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| C06 | Publication | ||
| PB01 | Publication | ||
| C10 | Entry into substantive examination | ||
| SE01 | Entry into force of request for substantive examination | ||
| C13 | Decision | ||
| C14 | Grant of patent or utility model | ||
| C17 | Cessation of patent right |