CN101176910A - Assistant plumbago inner lining for semi-continuous casting aluminum alloy cake electromagnetic field - Google Patents
Assistant plumbago inner lining for semi-continuous casting aluminum alloy cake electromagnetic field Download PDFInfo
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- CN101176910A CN101176910A CNA2007101910254A CN200710191025A CN101176910A CN 101176910 A CN101176910 A CN 101176910A CN A2007101910254 A CNA2007101910254 A CN A2007101910254A CN 200710191025 A CN200710191025 A CN 200710191025A CN 101176910 A CN101176910 A CN 101176910A
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- inner bushing
- graphite liner
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Abstract
The invention provides a graphite bushing used on electromagnetic field aided semi-continuous casting for aluminium alloy slab ingot, which comprises front, back, left and right four pieces of graphite. A plurality of insulation layers are respectively arranged at the adapting places between adjacent graphite; the graphite inner bushing is symmetric construction in vertical direction; the inner wall of the graphite inner bushing is provided with tapers; the upper end face and the lower end face of the graphite inner bushing are designed with a slot respectively. The body of the graphite inner bushing is spliced by four pieces of graphite; the adapting places are filled with insulation material, so as to reduce the induction heating effect of the alternate electromagnetic field to the graphite inner bushing and to improve the utilization ratio of the electromagnetic field; the graphite inner bushing is designed with vertical symmetric construction; therefore, when the lower surface is damaged, the graphite inner bushing can be turned over upside down and can be used sequentially, and the service life of the graphite inner bushing is improves one time. The contact surfaces between the graphite inner bushing and the aluminum fused mass are designed with tapers, so as to make the cast ingots being easy demoulded. The invention has the advantages of great practicality and wonderful application value.
Description
Technical field
The present invention relates to a kind of aluminium alloy flat bloom electromagnetic field auxiliary semi-continuous casting graphite liner, belong to the aluminum alloy semi-continuous casting technical field.
Background technology
The former Russian scholar Getselev has invented the electromagnetic casting technology, owing in casting process, replaced traditional crystallizer wall, but rely on electromagnetic force constraint liquid metal to be shaped fully, liquid metal and extraneous noncontact in the casting process, the aluminium alloy cast ingot surface of therefore adopting the electromagnetic casting preparation is light very, can directly push without turning, rolling.But the coupling of this specification requirement casting parameter and electromagnetic parameter must be very accurate, otherwise be easy to the phenomenon that bleedout occurs even be difficult to cast form.For improving the operability and the versatility of electromagnetic casting, the electromagnetic field auxiliary semi-continuous casting technology grows up gradually, this technology is the supporting surface when utilizing electromagnetic force and crystallizer wall to provide liquid metal solidification jointly, compare with no mould electromagnetic casting, this technology is easy and simple to handle, highly versatile, ingot quality have also obtained tangible raising than routine casting.
Different with conventional crystallizer is, the electromagnetic field auxiliary semi-continuous casting technology is to add an electromagnetic inductor in crystallizer, and this electromagnetic inductor can form with copper cash or copper coin coiling.Inductor is positioned in the crystallizer.In order to increase the lubricant effect of crystallizer, crystallizer often adopts the high-strength graphite liner conduct with " self-lubricating " function and the direct contact surface of liquid aluminium melt.But the graphite liner is owing to constantly stand the erosion of faradic heating and high-temperature fusant, the inner lining surface serious wear, and service life is shorter, needs periodic replacement.
Summary of the invention
The purpose of this invention is to provide a kind of aluminium alloy flat bloom electromagnetic field auxiliary semi-continuous casting graphite liner, be intended to overcome the deficiency that existing graphite liner must frequently be changed owing to wear and tear, when casting, can reduce the friction of ingot casting, prolong the service life of graphite liner graphite surface.
Purpose of the present invention is achieved through the following technical solutions:
A kind of aluminium alloy flat bloom electromagnetic field auxiliary semi-continuous casting graphite liner, it is characterized in that: described graphite liner is combined to form by four blocks of graphite all around, the joining place of adjacent graphite is provided with insulating barrier respectively, the graphite liner is symmetrical structure up and down, the inwall of graphite liner has tapering, and graphite liner upper and lower end face respectively is provided with a draw-in groove.
Further, above-mentioned a kind of aluminium alloy flat bloom electromagnetic field auxiliary semi-continuous casting graphite liner, the insulating barrier of adjacent graphite joining place setting is a mica sheet.
Further, above-mentioned a kind of aluminium alloy flat bloom electromagnetic field auxiliary semi-continuous casting graphite liner, described graphite liner inwall has tapering, and its cone angle is 173 °～178 °.
Substantive distinguishing features and obvious improvement that technical solution of the present invention is outstanding are mainly reflected in:
1. graphite liner of the present invention adopts the split design, is spliced by four blocks of graphite, and joining place is provided with insulating barrier, blocked the loop of graphite liner, to reduce the eddy-current heating effect of alternating electromagnetic field to the graphite liner, improved the utilization rate of electromagnetic field, the frictional force of ingot casting is less in the casting process;
2. the graphite liner adopts symmetric design up and down, the graphite liner can be spun upside down during damaged surfaces instantly and continue to use, and has prolonged the service life of graphite liner;
3. the inwall that contacts with aluminum melt of graphite liner adopts taper design, is beneficial to the smooth demoulding of ingot casting during casting.
Description of drawings
Below in conjunction with accompanying drawing technical solution of the present invention is described further:
Fig. 1: the cutaway view of graphite liner;
Fig. 2: the vertical view of graphite liner;
Fig. 3: the schematic diagram when the graphite liner is used.
The implication of each Reference numeral sees the following form among the figure:
| Reference numeral | Implication | Reference numeral | Implication | Reference | Implication | |
| 1 | Left surface graphite | 2 | |
3 | Right flank graphite | |
| 4 | |
5 | Insulating barrier | 6 | The crystallizer body | |
| 7 | The crystallizer cover plate | 8 | Electromagnetic inductor | 9 | Aluminium alloy melt | |
| 10 | The graphite liner | 11 | Cooling water | 12 | Solid-liquid two-phase region | |
| 13 | Ingot casting |
The specific embodiment
As shown in Figure 1 and Figure 2, a kind of aluminium alloy flat bloom electromagnetic field auxiliary semi-continuous casting graphite liner, by leading flank graphite 4, trailing flank graphite 2, left surface graphite 1, right flank graphite 3 totally four blocks of graphite combine, the joining place of adjacent graphite is provided with mica sheet 5 respectively; The graphite liner is symmetrical structure up and down, and the inwall of graphite liner has tapering, and its cone angle is 173 °～178 °; Each design of graphite liner upper and lower end face has a draw-in groove.
The graphite liner adopts split-type structural, shape global design rectangularity according to slab ingot, adjacent graphite joining place is provided with an insulating barrier respectively, the loop of blocking-up graphite liner, prevent that whole graphite liner forms circular induced current under electromagnetic field effect, reduce consumption and the reduction graphite body self-heating cooking of electromagnetic field at the graphite liner.
The graphite liner adopts symmetric design up and down, the graphite liner can be spun upside down when the graphite bottom wear phenomenon occurs owing to service time is long and continue to use, and can prolong one times the service life of whole graphite liner.
Graphite liner and aluminum melt contact-making surface adopt taper design, and metal bath surface is positioned at below the graphite liner center line during casting, can reduce that ingot casting improves the graphite life-span to the frictional force of graphite liner in the casting process.A draw-in groove has respectively been designed in graphite liner upper and lower end face, is used for carrying out assembling and positioning with the crystallizer body.
When graphite liner 10 of the present invention is applied to the aluminium alloy flat bloom electromagnetic field auxiliary casting, as shown in Figure 3.Earlier four blocks of graphite are assemblied in respectively in the crystallizer body 6 corresponding draw-in grooves, fill with mica sheet the junction; Electromagnetic induction coil 8 places between graphite liner and the aluminium wall, with 6 insulation of crystallizer body, covers crystallizer cover plate 7 around the coil, finishes the crystallizer assembling.
Smear lubricating oil to graphite liner 10 equably before the casting, make graphite surface form the uniform oil film of skim, cooling water cavity is connected with cooling water 11, and electromagnetic induction coil is connected power supply; Aluminium alloy melt 9 at first is full of base and touches graphite liner 10 gradually after entering crystallizer, along with the inflow liquid level of melt constantly raises, when liquid level during near graphite liner center line casting process begin, form solid-liquid two-phase region 12, whole ingot casting 13 is solidification forming under the secondary cooling effect of the once cooling of graphite liner and cooling water.
In sum, not only the frictional force with ingot casting is little when adopting graphite cast in liners of the present invention, and is beneficial to the smooth demoulding of ingot casting.Because graphite liner body adopts the piecemeal design, has effectively reduced the eddy-current heating effect of alternating electromagnetic field to graphite itself, has strengthened the utilization rate of electromagnetic field.In addition, the graphite liner adopts symmetric design, owing to bear for a long time when wearing and tearing appear in the high temperature aluminum melt and it can be spun upside down, be doubled the service life of graphite liner, brought fabulous technical meaning and far-reaching economic benefit when graphite liner lower surface.
Below only be concrete exemplary applications of the present invention, protection scope of the present invention is not constituted any limitation.All employing equivalents or equivalence are replaced and the technical scheme of formation, all drop within the rights protection scope of the present invention.
Claims (3)
1. aluminium alloy flat bloom electromagnetic field auxiliary semi-continuous casting graphite liner, it is characterized in that: described graphite liner is combined to form by four blocks of graphite all around, the joining place of adjacent graphite is provided with insulating barrier respectively, the graphite liner is symmetrical structure up and down, the inwall of graphite liner has tapering, and graphite liner upper and lower end face respectively is provided with a draw-in groove.
2. a kind of aluminium alloy flat bloom electromagnetic field auxiliary semi-continuous casting graphite liner according to claim 1, it is characterized in that: the insulating barrier of adjacent graphite joining place setting is a mica sheet.
3. a kind of aluminium alloy flat bloom electromagnetic field auxiliary semi-continuous casting graphite liner according to claim 1 is characterized in that: described graphite liner inwall has tapering, and its cone angle is 173 °～178 °.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CNA2007101910254A CN101176910A (en) | 2007-12-05 | 2007-12-05 | Assistant plumbago inner lining for semi-continuous casting aluminum alloy cake electromagnetic field |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CNA2007101910254A CN101176910A (en) | 2007-12-05 | 2007-12-05 | Assistant plumbago inner lining for semi-continuous casting aluminum alloy cake electromagnetic field |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN101176910A true CN101176910A (en) | 2008-05-14 |
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Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CNA2007101910254A Pending CN101176910A (en) | 2007-12-05 | 2007-12-05 | Assistant plumbago inner lining for semi-continuous casting aluminum alloy cake electromagnetic field |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN101176910A (en) |
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN106862508A (en) * | 2017-02-14 | 2017-06-20 | 钢铁研究总院 | A kind of circular arc narrow copper plate crystallizer |
| CN109940138A (en) * | 2019-04-11 | 2019-06-28 | 中国重型机械研究院股份公司 | A kind of alloy slab sizing coolant jacket, crystallizer and application |
-
2007
- 2007-12-05 CN CNA2007101910254A patent/CN101176910A/en active Pending
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN106862508A (en) * | 2017-02-14 | 2017-06-20 | 钢铁研究总院 | A kind of circular arc narrow copper plate crystallizer |
| CN106862508B (en) * | 2017-02-14 | 2019-05-31 | 钢铁研究总院 | A kind of arc-shaped narrow copper plate crystallizer |
| CN109940138A (en) * | 2019-04-11 | 2019-06-28 | 中国重型机械研究院股份公司 | A kind of alloy slab sizing coolant jacket, crystallizer and application |
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Open date: 20080514 |