CN201366496Y

CN201366496Y - Up-drawing continuous casting electromagnetic stirring device

Info

Publication number: CN201366496Y
Application number: CNU200920036780XU
Authority: CN
Inventors: 吴涛; 陶炳贞
Original assignee: TAIXING CITY SHENGDA COPPER INDUSTRY Co Ltd
Current assignee: TAIXING CITY SHENGDA COPPER INDUSTRY Co Ltd
Priority date: 2009-02-25
Filing date: 2009-02-25
Publication date: 2009-12-23
Anticipated expiration: 2019-02-25

Abstract

The utility model relates to an up-drawing continuous casting electromagnetic stirring device comprising an inner shell, an outer shell, a crystallizer and an electromagnetic device, wherein the crystallizer passes through and is fixed in the electromagnetic device which is fixed between the inner shell and the outer shell; the electromagnetic device comprises three or more groups of induction coils with laminated steel sheets; insulating spacer blocks are respectively arranged among all groups of induction coils as well as between the induction coils and the inner shell and the outer shell; and each group of induction coils are respectively connected with a transformer and a frequency converter by magnesia leads. The stirring device has simple and compact structure, and low frequency power generated by the frequency converter passes through the plurality of electromagnetic coils to generate a travelling wave alternating current magnetic field and a secondary alternating current magnetic field and passes through thick columnar dendritic crystals of the crystallizer after breaking solidification of casting billet, thus improving solidification structure of casting rod billet and refining crystal particles, and achieving better stirring effect for up-drawing casting rods below Phi 30mm.

Description

Upper continuous casting electromagnetic stirring device

Technical field

The utility model relates to a kind of electromagnetic mixing apparatus, particularly is applicable to the upper continuous casting electromagnetic stirring device of copper that diameter is little and copper alloy casting bar.

Background technology

Along with the development of continuous casting technology, the internal soundness of continuous casting copper and copper alloy casting bar base requires more and more higher.Casting bar internal soundness depends on to a great extent whether casting bar inside presents evenly and fine and close equiax crystal solidified structure.But in the actual process of setting of continuous casting billet bar, because cooling velocity is very fast, the column crystal development when causing casting blank solidification often produces " bridgings " phenomenon, causes defective generations such as the segregation of strand internal shrinkage, loose, field trash gathering.Electromagnetic agitating technology has important function to improving the strand performance, adopt electromagnetic agitating technology can improve the equi-axed crystal of strand, its solidified structure of refinement, reduce inclusion content, promote homogenization of composition, reduce thermograde, reduce the cooldown rate of copper liquid, impel the transformation of column crystal, thereby improve inner surface of strand and subsurface quality, and then improve the mechanical property of strand to equiax crystal.But the above strand of existing electromagnetic agitating technology continuous up-casting φ 80mm can be ensured the quality of products, on the casting bar that draws below the φ 30mm but can not reach texture preferably, casting bar quality can not get guaranteeing.

Summary of the invention

The utility model purpose is to solve the deficiencies in the prior art, provides a kind of when continuous up-casting, can improve the upper continuous casting electromagnetic stirring device of φ 30mm with lower beam base surface, subsurface quality.

In order to achieve the above object, the technical solution adopted in the utility model is: in a kind of upper continuous casting electromagnetic stirring device comprises, shell body, crystallizer, calutron, crystallizer runs through and is fixed in the calutron, in calutron is fixed on, between the shell body, technical characterstic is that calutron comprises the induction coil that has the steel disc that changes more than three groups or three groups, between every group of induction coil and induction coil and in, be respectively equipped with cross-over block between the shell body, every group of induction coil connects transformer respectively through the magnesia fire-retarding conducting line and produces the different alternating magnetic field of multiple direction with frequency converter, size by continuous change field frequency reaches agitating function.Be provided with cooling water recirculation system between described induction coil and the shell body.

Have repeatedly the induction coil of steel plate iron core is connected respectively to outer switch board by lead transformer and frequency converter in the utility model more than three groups or three groups, the low-frequency power that frequency converter produces produces row ripple AC magnetic field, inferior AC magnetic field by solenoid, pass the thick columnar dendrite after crystallizer is smashed casting blank solidification, obtain equiax crystal, crystal grain thinning, thereby reach the solidified structure of improvement casting bar base and the effect of crystal grain thinning, mixing effect is good, the yield rate height; Calutron is fixed between the inside and outside housing, upper continuous casting electromagnetic stirring device is fixed on the casting crystallizer outside and is synchronized with the movement with crystallizer, guarantee operation interval invariant position on crystallizer of electromagnetic mixing apparatus, overall structure is stable, has guaranteed the electromagnetic agitation effect; The lead of connecting coil adopts the magnesia fire-retarding conducting line, and anticorrosion, resistance to elevated temperatures are higher, are applicable to various working environments; Be provided with cooling water recirculation system between induction coil and the shell body, absorb the heat of induction coil heating and smelting furnace radiation, guarantee the operate as normal of electromagnetic mixing apparatus under hot environment, the electromagnetic mixing apparatus long service life.

The low-frequency power that the utility model adopts frequency converter to produce produces row ripple AC magnetic field, inferior AC magnetic field by a plurality of solenoids, pass the thick columnar dendrite after crystallizer is smashed casting blank solidification, thereby reach the solidified structure that improves casting bar base and the effect of crystal grain thinning, on the casting bar that draws below the φ 30mm reach mixing effect preferably.

Description of drawings

Fig. 1 is a structural representation of the present utility model;

Fig. 2 is a schematic top plan view of the present utility model.

The specific embodiment

The utility model is described in further detail below in conjunction with accompanying drawing.

A kind of continuous up-casting magnetic stirrer shown in Fig. 1 comprises inner housing 1, shell body 2, crystallizer 3, cross-over block 4, induction coil 5, repeatedly steel disc 6, cooling water recirculation system 7, lead 8, transformer 9, frequency converter 10.Inside and outside housing is fixed on the crystallizer outside, three groups of induction coils that have the steel disc that changes are fixed between inner housing and the shell body, separate with cross-over block between every group of induction coil, separate with cross-over block between induction coil and inside and outside housing, three groups of induction coils are connected respectively to transformer and frequency converter in the outer switch board by lead, are provided with cooling water recirculation system between induction coil and the shell body.This upper continuous casting electromagnetic stirring device is exactly the outside that magnetic stirrer is set in crystallizer, and along with on draw the height of liquid level in the stove, it can be followed crystallizer and draw up and down synchronously, the operation interval position on crystallizer that guarantees magnetic stirrer does not change, and guarantees that this installs terminal electromagnetic agitation function and reaches desirable effect.

Claims

1, a kind of upper continuous casting electromagnetic stirring device, in comprising, shell body (1,2), crystallizer (3), calutron, crystallizer (3) runs through and is fixed in the calutron, in calutron is fixed on, shell body (1,2) between, it is characterized in that: described calutron comprises the induction coil (5) that has the steel disc (6) that changes more than three groups or three groups, between every group of induction coil and induction coil and in, shell body (1,2) be respectively equipped with cross-over block (4) between, every group of induction coil (5) connects transformer (9) respectively through lead (8) and reaches agitating function with the different alternating magnetic field of frequency converter (10) the multiple direction of generation.

2, upper continuous casting electromagnetic stirring device according to claim 1 is characterized in that: be provided with cooling water recirculation system (7) between described induction coil (5) and the shell body (2).