CN101885042B - Electrode for applying pulse current to continuous casting tundish - Google Patents
Electrode for applying pulse current to continuous casting tundish Download PDFInfo
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- CN101885042B CN101885042B CN2010102142704A CN201010214270A CN101885042B CN 101885042 B CN101885042 B CN 101885042B CN 2010102142704 A CN2010102142704 A CN 2010102142704A CN 201010214270 A CN201010214270 A CN 201010214270A CN 101885042 B CN101885042 B CN 101885042B
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- electrode
- pulse current
- continuous casting
- distribution plate
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Abstract
The invention discloses an electrode for applying pulse current to a continuous casting tundish. The electrode is characterized by comprising a cone frustum shaped fireproof material (2) and an electrode distribution plate (3) embedded into the fireproof material (2); a plurality of rod-like small electrodes (4) are vertically distributed on the surface of the electrode distribution plate (3); the rod-like small electrodes (4) pass through the cone frustum shaped fireproof material (2), and the ends of the rod-like small electrodes (4) are naked on the surface of the cone frustum shaped fireproof material (2) and connected with molten steel; the bottom end of the electrode distribution plate (3) is provided with a pulse current connecting end (1); and the pulse current connecting end (1) passes out of the bottom end face of the cone frustum shaped fireproof material (2) and is connected with a pulse power supply. The electrode has the advantages of strong high-temperature oxidation resistance and molten steel melting resistance, long service life, good conductivity, simple and feasible operation in a pulse processing process, safety and reliability.
Description
Technical field
The invention belongs to a kind of field of steel-making continuous casting tundish that is used for and apply the pulse current technology, particularly a kind of electrode that is used for applying pulse current to the continuous casting tundish.
Background technology
Be one of the important subject of 21 century steel and iron industry intensity, toughness, ductility, processing characteristics and the service life of improving steel.Change metallographic structure, the crystal grain thinning degree is a kind of method wherein.The content of specific alloy elements that can be by improving steel is realized, also can finish by controlled rolling and controlled cooling and Equal Channel Angular Pressing cold deformation technology.
The electric pulse thinning metal solidification texture is a new technology in the metal structure refinement field.Electric pulse refinement continuous casting billet solidified structure mainly is before the solidification of molten steel or in the process of setting, by metal bath being applied suitable pulse voltage, to control the method for continuous casting billet solidified structure with realization in continuous casting is produced.This technology has at first been carried out experimental study in the non-ferrous metal field, especially the influence to Al, Al-5Cu alloy, Al-18%Si alloy, Sn-15%Pb alloy graining tissue obtains certainly
[1-4], again this technology had been incorporated into the steel-making continuous casting aspect in recent years, as molten steel in continuous cast mold or the tundish is applied electric pulse to its Research on effect
[5-8], the thinning effect of electric pulse technology is remarkable, and it has stable, small investment, characteristics such as pollution-free, belongs to the metallurgical technology of clean environment-friendly, is described as " green solidifying fine crystal technology ", has obtained domestic and international researcher's close attention.Though this technology has obtained certain progress aspect experimental study, the commercial Application electrode also needs to satisfy following two aspects and requires:
1) high temperature oxidation resisting of practical electrode and the meltdown property of anti-the molten steel await to improve, and need reach the serviceability of long period.
2) electric conductivity of practical electrode awaits improving, and should reduce resistance as far as possible, improves electrical conductivity.
List of references
[1] Wang Jianzhong, Qi Jingang, Du Huiling etc. electro-pulse modification is handled the influence to the fine aluminium solidified structure
[J]. material science and technology, 2008 (16).
[2] Wang Bing, Wang Jianzhong, neat brocade is firm etc. and electro-pulse modification is handled the influence to the hot tearing of Al-5Cu alloy
[J]. Special Processes of Metal Castings and non-ferrous alloy, 2007, (27).
[3] stone eastwards, Xue Qingguo, Wang Jingsong etc. the electric pulse processing time is to the influence [J] of Al-18%Si alloy graining tissue. metal heat treatmet, 2005, (12).
[4] Wang Jingsong, Xue Qingguo, stone wait eastwards. and electric pulse is handled the influence [J] to dendritic morphology in the Sn-15%Pb alloy graining tissue. University of Science ﹠ Technology, Beijing's journal, 2005, (27).
[5] Gu Wuan, Cang Daqiang opens heavily fortified point etc. the continuous cast mold molten steel is applied the research [J] that electric pulse improves the strand equiaxial crystal ratio. and steel vanadium titanium, 2008, (29).
[6] Gu Wuan. the tundish molten steel applies the metallurgical effect research [J] of electric pulse. steel vanadium titanium, 2009, (1).
[7] Zhang Xifeng, Yuan Shouqian, Wei Yingjuan etc. electric pulse is handled the influence [J] to 45 steel solidified structures. heat processing technique, 2008, (6).
[8] Zhang Xifeng, Yuan Shouqian, the king is superfine. the research [J] of electric pulse refinement HRB335 screw-thread steel solidified structure. heat processing technique, 2008, (11).
Summary of the invention
The purpose of this invention is to provide a kind of electrode that is used for applying pulse current to the continuous casting tundish, this electrode acts on molten steel in the tundish by be applied thereto pulse current in continuous casting production process, reach the purpose of improving the continuous casting billet solidified structure, and this electrode high temperature oxidation resisting and the meltdown property of anti-the molten steel are strong, long service life; Conduct electricity very well; Operation is simple in the burst process process for electrode, safe and reliable.
The objective of the invention is to realize by following technical proposals, a kind of electrode that is used for applying pulse current to the continuous casting tundish, it is characterized in that: comprise a circular cone shape refractory material and be embedded in electrode distribution plate in this refractory material, vertical distribution has some bar-shaped small electrodes on this electrode distribution plate surface, and bar-shaped small electrode exposes at circular cone shape refractory surface and molten steel through described circular cone shape refractory material and its termination and joins; Be provided with the pulse current incoming end in described electrode distribution plate bottom; This pulse current incoming end passes circular cone shape refractory material bottom face and links to each other with the pulse power.
Described bar-shaped small electrode is uniform outside to inside certainly along electrode distribution plate circumferential surface hoop successively, and adjacent two spacing between electrodes are 2mm-10mm.
Described bar-shaped small electrode cross section is cylindrical or rectangle flat strip shaped structure, and its single area of section is 1mm
2-20mm
2, the number of required small electrode is determined according to the size and the current density allowable of pulse current.
Described bar-shaped small electrode and pulsed electrode distribution plate are welded to connect or are structure as a whole.
Described bar-shaped small electrode takes low-carbon steel material to make.
The invention has the beneficial effects as follows that owing to taked the pulsed electrode of said structure, its pyro-oxidation resistance improves greatly, can reach synchronous with the loss of tundish inwall; Simultaneously, the design of snap joint makes pulsed electrode be convenient for changing, and has made things convenient under the hot conditions electric pulse to molten steel to handle, and has improved the solidified structure of continuous casting billet.
Description of drawings
Fig. 1 is the pulsed electrode structural representation;
Fig. 2 is that pulsed electrode A is to schematic diagram;
Fig. 3 is the tundish structure schematic diagram that is used for electric pulse;
Fig. 4 is that pulsed electrode connects schematic diagram with tundish.
Among the figure: 1. pulse current incoming end, 2. refractory material, 3. electrode distribution plate, 4. bar-shaped small electrode, the 5. fixing pipe of pulsed electrode, 6. flange, 7. fixed pulse electrode plectane, 8. pulsed electrode joint, 9. insulating materials, 10. set bolt, 11. tundish walls; I. tundish, II. pulsed electrode installing hole, H. tundish height overall, h. pulsed electrode setting height(from bottom).
The specific embodiment
Below in conjunction with drawings and the specific embodiments the present invention is elaborated.
As shown in Figure 1, this is used for applying the electrode of pulse current to the continuous casting tundish, comprise a circular cone shape refractory material 2 and be embedded in electrode distribution plate 3 in this refractory material 2, in these electrode distribution plate 3 surperficial vertical distribution some bar-shaped small electrodes 4 are arranged, bar-shaped small electrode 4 joins through described circular cone shape refractory material 2 and its termination and molten steel; Be provided with pulse current incoming end 1 in described electrode distribution plate 3 bottoms; This pulse current incoming end 1 passes circular cone shape refractory material 2 bottom faces and links to each other with the pulse power.
As shown in Figure 2, bar-shaped small electrode 4 evenly distributes certainly outside to inside along electrode distribution plate 3 circumferential surfaces hoop successively.To select bar-shaped small electrode 4 cross sections for use be cylindrical or the low-carbon steel material of rectangle flat strip shaped structure as bar-shaped small electrode.Electrode of the present invention allows the current density passed through according to the transient current scope of electrical pulse device output and bar-shaped small electrode 4 materials, can calculate the total electrode area of section that contacts with molten steel by A=I/J.Above-mentioned output current I scope is given according to the selected pulsing unit of each applying unit, and bar-shaped small electrode 4 materials allow the current density, J passed through according to the material decision of being adopted.After determining total cross dimensions of bar-shaped small electrode 4, be 1mm in definite these bar-shaped small electrode 4 single area of section scopes
2-20mm
2Interior selected single bar-shaped small electrode 4 area of section 10mm
2, can calculate the radical of needs according to these selected single bar-shaped small electrode 4 areas of section with bar-shaped small electrode 4.The number of required small electrode is determined according to the size and the current density allowable of pulse current.The foregoing description has only provided the embodiment of single bar-shaped small electrode 4 areas of section, and the invention is not restricted to this and limit single bar-shaped small electrode 4 areas of section, be 1-20mm at bar-shaped small electrode 4 single areas of section
2Being chosen as of making in the scope all belongs to the present invention and allows the scope implemented.
Bar-shaped small electrode 4 should be evenly distributed in (as shown in Figure 1) on the round tray.Adjacent two spacing between electrodes keep the spacing of 2mm-10mm, and then can determine to weld pulsed electrode distribution plate 3 areas of bar-shaped small electrode 4.
Bar-shaped small electrode 4 of the present invention is welding connecting mode or integrative-structure with pulsed electrode distribution plate 3.
Fig. 3 has provided the tundish structure schematic diagram that the present invention is used for electric pulse; As shown in Figure 3, according to continuous casting tundish actual conditions, as tundish capacity, operating fluid level, middle water containing opening quantity etc. when drawing steel, tundish is undergone technological transformation, actual conditions according to the continuous casting tundish, determine the rational setting height(from bottom) h of pulsed electrode according to Fig. 3, and reserve pulsed electrode installing hole II at tundish I bag wall.Pulsed electrode can be installed smoothly.The pulsed electrode of making (shown in Figure 1) is installed on the position of the pulsed electrode installing hole II correspondence that Fig. 3 tundish reserves, and promptly pulsed electrode distribution plate 3 is installed on 1/3 place, tundish bottom.H shown in the figure is the height overall of tundish.
Fig. 4 has provided the structural representation that the present invention is installed on tundish, and it is connected and fixed as shown in Figure 4, and bar-shaped small electrode 4 is welded on the electrode distribution plate 3, by amorphous refractory 2 bar-shaped small electrode 4 is coated wherein the moulding of tiing a knot; Pulse current incoming end 1 with pulsed electrode connects pulsed electrode joint 8 then, and coats one deck fixed pulse electrode plectane 7 in refractory material 2 bottoms, is provided with insulating materials 9 at fixed pulse electrode plectane 7 with pulse current incoming end 1 section of contacting; Pulsed electrode is connected with fixed pulse electrode plectane 7 by the flange 6 that set bolt 10 will be connected on the fixed pulse electrode plectane 7.During installation, pulsed electrode injects tundish wall 11, and by be welded on the tundish wall 11 pulsed electrode fixedly pipe 5 pulsed electrode is fixedlyed connected with the tundish I; Bar-shaped small electrode 4 terminations of pulsed electrode upper surface and the parallel distribution in tundish wall upper surface.
Pulsed electrode is packed into behind the tundish installing hole, be connected with the pulse power by pulsed electrode joint 8.Pulsed electrode and continuous casting tundish are installed intact, be transported to draw the steel position after, be connected with the pulse power by its pulsed electrode joint, realization is to the electric pulse of molten steel in casting process.
In casting process, according to tundish liquid level situation, strobe pulse voltage, in good time unbalanced pulse power supply applies the electric pulse of different electrical parameters to middle Baogang water.Electrode of the present invention will use 2 in use simultaneously, and its correspondence is embedded in the symmetric position of tundish cylinder-packing, and this can be handled by electric pulse the molten steel between the electrode.Thereby reach by metal bath being applied suitable pulse current, to realize the purpose of control continuous casting billet solidified structure.
The steel-making continuous casting tundish is guaranteed to carry out suitable process and remould under the constant situation of its capacity and property easy to use, by electrical pulse device output pulse current, import molten steel by high temperature resistant wire, tundish pulsed electrode joint 8, metal electrode distribution plate 3, pulsed electrode, molten steel is carried out electric pulse handle.For pulsed electrode high-temperature corrosion resistance performance is improved, on the assembly technology, the metal distribution plate in tiny metal electrode and the pallet welds, and the back side is reserved the pulsed electrode joint and is connected with the pulse power.Simultaneously, select suitable indefinite form high-temperature refractory for use, guaranteeing that bar-shaped small electrode can not contact with each other and have under the condition of certain intervals, many bar-shaped small electrodes are coated wherein, the moulding of tiing a knot, baking setting (as shown in Figure 2).
On the parameter, the electrode resistance coefficient of selecting for use is little, allows the current value that passes through big, and each bar-shaped small electrode current-carrying section satisfies the requirement of output.Bar-shaped small electrode maintains a certain distance each other.Under the heat fused effect of high-temperature molten steel, even bar-shaped small electrode end is melted, the indefinite form high-temperature refractory shape that still can hold its shape is constant.Like this, since the double action of molten steel surface tension and bag wall temperature gradient, intrusion that the molten steel of high temperature can't be dark excessively or the bar-shaped small electrode in the melt pulse electrode, therefore, as long as each related parameter choosing of pulsed electrode is proper, then can obtain and the pulsed electrode of tundish with the life-span.
Claims (5)
1. electrode that is used for applying pulse current to the continuous casting tundish, it is characterized in that: comprise a circular cone shape refractory material (2) and be embedded in electrode distribution plate (3) in this refractory material (2), in the surperficial vertical distribution of this electrode distribution plate (3) some bar-shaped small electrodes (4) are arranged, an end of bar-shaped small electrode (4) is through described circular cone shape refractory material (2) and its termination is exposed to circular cone shape refractory material (2) surface and molten steel joins; Be provided with pulse current incoming end (1) in described electrode distribution plate (3) bottom; This pulse current incoming end (1) passes circular cone shape refractory material (2) bottom face and links to each other with the pulse power.
2. a kind of electrode that is used for applying pulse current according to claim 1 to the continuous casting tundish, it is characterized in that: described bar-shaped small electrode (4) is uniform outside to inside certainly along electrode distribution plate (3) circumferential surface hoop successively, and adjacent two spacing between electrodes are 2mm-10mm.
3. a kind of electrode that is used for applying pulse current to the continuous casting tundish according to claim 1 is characterized in that: described bar-shaped small electrode (4) cross section is cylindrical or rectangle flat strip shaped structure, and its single area of section is 1mm
2-20mm
2
4. a kind of electrode that is used for applying pulse current to the continuous casting tundish according to claim 1 is characterized in that: described bar-shaped small electrode (4) is welded to connect with electrode distribution plate (3) or is structure as a whole.
5. a kind of electrode that is used for applying pulse current to the continuous casting tundish according to claim 1 is characterized in that: described bar-shaped small electrode (4) takes low-carbon steel material to make.
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| Application Number | Priority Date | Filing Date | Title |
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| CN2010102142704A CN101885042B (en) | 2010-06-30 | 2010-06-30 | Electrode for applying pulse current to continuous casting tundish |
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|---|---|---|---|
| CN2010102142704A CN101885042B (en) | 2010-06-30 | 2010-06-30 | Electrode for applying pulse current to continuous casting tundish |
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| CN101885042A CN101885042A (en) | 2010-11-17 |
| CN101885042B true CN101885042B (en) | 2011-11-23 |
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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| WO2013106953A1 (en) * | 2012-01-21 | 2013-07-25 | 唐山文丰山川轮毂有限公司 | Metallurgical tank electric-pulse device |
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| CN102078922B (en) * | 2011-01-28 | 2012-10-24 | 武安市文祥合金制造有限公司 | Casting gating system |
| CN104981434B (en) * | 2012-11-21 | 2017-04-19 | 香港科技大学 | Pulsed electric field for drinking water disinfection |
| CN107812902B (en) * | 2017-12-07 | 2019-04-23 | 安徽工业大学 | A kind of device improving micro-alloyed steel continuous casting process castability |
| CN107999718B (en) * | 2017-12-07 | 2019-05-31 | 安徽工业大学 | A method of improving micro-alloyed steel continuous casting process castability |
| CN110057864B (en) * | 2019-05-08 | 2020-02-07 | 北京科技大学 | Simulation device and method for heating process of molten steel in water gap channel |
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| CN2259627Y (en) * | 1995-12-22 | 1997-08-13 | 中国科学院长春应用化学研究所 | Thin-layer electro-chemical cell for producing processing micro electrolytic sample |
| RU2164559C1 (en) * | 2000-07-04 | 2001-03-27 | Акционерное общество открытого типа "Уралредмет" | Electrolyzer for refining vanadium and other refractory metals |
| RU2228391C2 (en) * | 2002-06-06 | 2004-05-10 | Открытое акционерное общество "Всероссийский алюминиево-магниевый институт" | Process of mounting of cathode set of aluminum electrolyzer |
| US20050098106A1 (en) * | 2003-11-12 | 2005-05-12 | Tokyo Electron Limited | Method and apparatus for improved electrode plate |
| RU2283290C2 (en) * | 2004-01-26 | 2006-09-10 | Алексей Юрьевич Ким | Chamber electric resistance furnace |
| CN200984448Y (en) * | 2006-09-14 | 2007-12-05 | 夏宗邦 | Discharging device of capacitor |
| CN201501902U (en) * | 2009-09-27 | 2010-06-09 | 上海大学 | Adjustable anode device applicable to pollution-free deoxidation of external electric field of slag metal room |
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| WO2013106953A1 (en) * | 2012-01-21 | 2013-07-25 | 唐山文丰山川轮毂有限公司 | Metallurgical tank electric-pulse device |
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