CN1188233C - Continuous casting crystallizer - Google Patents
Continuous casting crystallizer Download PDFInfo
- Publication number
- CN1188233C CN1188233C CN 99128110 CN99128110A CN1188233C CN 1188233 C CN1188233 C CN 1188233C CN 99128110 CN99128110 CN 99128110 CN 99128110 A CN99128110 A CN 99128110A CN 1188233 C CN1188233 C CN 1188233C
- Authority
- CN
- China
- Prior art keywords
- crystallizer
- continuous casting
- cast mold
- liquid level
- lateral wall
- 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 - Fee Related
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- 238000009749 continuous casting Methods 0.000 title claims abstract description 17
- 239000007788 liquid Substances 0.000 claims abstract description 18
- 238000001816 cooling Methods 0.000 claims abstract description 10
- RYGMFSIKBFXOCR-UHFFFAOYSA-N Copper Chemical compound [Cu] RYGMFSIKBFXOCR-UHFFFAOYSA-N 0.000 claims abstract description 9
- 229910052802 copper Inorganic materials 0.000 claims abstract description 9
- 239000010949 copper Substances 0.000 claims abstract description 9
- 230000007704 transition Effects 0.000 claims description 5
- 238000009826 distribution Methods 0.000 claims description 2
- 238000004519 manufacturing process Methods 0.000 abstract description 5
- 230000005855 radiation Effects 0.000 description 9
- 229910000831 Steel Inorganic materials 0.000 description 5
- 239000010959 steel Substances 0.000 description 5
- 238000005266 casting Methods 0.000 description 3
- 230000008859 change Effects 0.000 description 2
- 230000007423 decrease Effects 0.000 description 2
- 230000005499 meniscus Effects 0.000 description 2
- 206010011376 Crepitations Diseases 0.000 description 1
- XEEYBQQBJWHFJM-UHFFFAOYSA-N Iron Chemical compound [Fe] XEEYBQQBJWHFJM-UHFFFAOYSA-N 0.000 description 1
- 208000037656 Respiratory Sounds Diseases 0.000 description 1
- 230000006978 adaptation Effects 0.000 description 1
- 230000015572 biosynthetic process Effects 0.000 description 1
- 238000010276 construction Methods 0.000 description 1
- 239000000498 cooling water Substances 0.000 description 1
- 230000017525 heat dissipation Effects 0.000 description 1
- 238000009434 installation Methods 0.000 description 1
- 239000000314 lubricant Substances 0.000 description 1
- 230000001050 lubricating effect Effects 0.000 description 1
- 230000014759 maintenance of location Effects 0.000 description 1
- 230000000191 radiation effect Effects 0.000 description 1
- 238000002791 soaking Methods 0.000 description 1
- 238000007711 solidification Methods 0.000 description 1
- 230000008023 solidification Effects 0.000 description 1
- 230000008719 thickening Effects 0.000 description 1
- 210000001364 upper extremity Anatomy 0.000 description 1
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 description 1
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Abstract
The present invention relates to a continuous casting crystallizer for manufacturing plate blank, particularly to a continuous casting crystallizer for manufacturing thin plate blanks. The crystallizer is provided with a water-cooled narrow side lateral wall and a water-cooled wide side lateral wall, wherein in the wide side lateral wall made of copper plates, on one hand, a sprue cup is formed in the middle of a region respectively leading to the two narrow sides in parallel, and on the other hand, a cooling trough is arranged outside or on the back surface of the region, which can improve the surface quality of the continuous casting thin plate blank, particularly can avoid the occurrence of longitudinal cracks or at least minimize the longitudinal cracks. The present invention only needs a lateral wall bulge (11) which is maximum in the deepest liquid level and gradually diminishes in the continuous casting direction (6) to reinforce the back surface (10) of the wide side lateral wall (2) from the lower part of the deepest liquid level (8).
Description
The present invention relates to a kind of continuous cast mold that is used to make slab, especially for the continuous cast mold of making sheet billet, it has the narrow avris wall and the broadside sidewall of water-cooled, wherein, in the broadside sidewall that it is made by copper coin, on the one hand forming a sprue cup inside in the middle of the parallel zone of leading to two narrow limits respectively, and on the other hand, outside or the back side be provided with cooling bath.
The sheet billet of making on continuous casting installation for casting for example is the band steel billet of the broad hot strip of 1-12mm as producing final thickness.This is to heat to finish on known so-called CSP-(Compact Strip Production) equipment, wherein, conticaster and soaking pit and a roll train group being aligned of following (referring to for example DE-Z " Stahl u.Eisen 108 (1988), the 3rd phase, the 99th to 109 page ").In the core of this CSP-casting process is to have the funnel-type crystallizer that is immersed in the submersed nozzle in the sprue cup.Because the initial solidification of liquid steel liquation in crystallizer of pouring into through submersed nozzle plays a decisive role to the surface quality of continuous-casting sheet billet, thus at this particularly importantly in the heat radiation in liquid level zone and the temperature retention time of crystallizer.These criterions are effectively same under the situation that with the plate type crystallizer production size range that does not need sprue cup usually is 320-150 * 3.000-800mm slab.
Thickening mainly by crystallizer lubricant, copper coin wall thickness between cooling duct and work side and the flowing velocity in the cooling duct of base shell decides.The result shows: the main cause that produces longitudinal crack in the base shell is width in the crystallizer upper area and the inhomogeneous and/or too high heat radiation on the height.This uneven heat radiation is that the different-thickness by the lubricating film between base shell and copper coin sidewall causes.
Consider that from qualitative factor on CPS-equipment, the copper coin wall thickness that is used for crystallizer for example is 25mm-15mm; Design parameter separately depends primarily on the size and the poring rate of continuous casting billet, draws thus to form the required heat dissipation capacity of base shell.
Task of the present invention is to provide a kind of beginning described the sort of continuous cast mold, uses this continuous cast mold can improve the surface quality of the sheet billet of cast end of a period, particularly can avoid the appearance of longitudinal crack, can make it reduce to minimum at least.
Task of the present invention is finished like this: at the darkest liquid level place for maximum, reinforce at the projected side wall that diminishes gradually on continuous casting direction back side to the broadside sidewall below the darkest liquid level.In casting process, be poured in the crystallizer, in the crystallizer wallboard, formed the temperature curve of being familiar with, so-called temperature bulge at the molten steel that solidifies on the crystallizer sidewall.With after this temperature bulge below the liquid level in the zone of about 100mm on the height at crystallizer rapid temperature decline opposite, projection of the present invention can make the rapid temperature decline in temperature bulge below reduce, this protruding starting point is determined according to the profile that depends on the liquid level of poring rate, and is just being begun its maximum ga(u)ge through one section of the such weak point of about 20-50mm by the existing gradient or transition under meniscus on the continuous casting direction.
Can reduce the heat radiation by the copper coin wall thickness that improves below liquid level there, and the appearance that can resist longitudinal crack by the thermic load that reduces the base shell.That is to say that the projection or the thicker wall thickness that are placed in the temperature bulge section have stoped too high there heat radiation, at first with the taper of wedge shape termination and the thickness of slab or the wall thickness of attenuation there heat radiation will correspondingly be increased gradually along with that increase gradually, downward, therefore for the temperature difference of longitudinal crack danger not occurring, the all-round adaptation.
According to a kind of preferred construction of the present invention,, temperature is descended reduce if the trend of the termination of the projected side wall that its length limits is parallel to the crystallizer sidewall.Because after very short one section gradient, this is approximately the long initial sector of 20-100mm and has maximum projection thickness, can be 3-15mm according to separately requirement, this section is positioned at the very high place of heat radiation in addition, and therefore thicker here projection has stoped cooling water one side to be dispelled the heat too post.
According to form of implementation of the present invention, projected side wall the crystallizer petiolarea of determining from sprue cup to size back to back on the continuous casting direction with it up to transition position diminish gradually.The copper coin wall thickness that can be implemented in by this way before the water is reducing on the length of cooling bath and thus can be with clearly defined objectively to the heat radiation effect on the crystallizer height gradually.
According to another kind of structure of the present invention, the thickness of projected side wall is corresponding in the width of crystallizer and the variation on the height with Temperature Distribution in crystallizer.Therefore make the geometry of the cooling bath in copper coin that different variations be arranged by a kind of and the temperature projection corresponding and that design according to the cast parameter that descends, impel and on the height of crystallizer and width, realize temperature-even.
Other features and advantages of the present invention will be provided by claim and following specification, elaborate the embodiment of theme of the present invention in specification with the crystallizer of a production sheet billet.Wherein:
Fig. 1 is the profilograph of continuous cast mold broadside sidewall;
Fig. 2 is the details on the top that enclosed by dotted line of the sidewall of Fig. 1 crystallizer;
Fig. 3 is the left view of the broadside sidewall of Fig. 1 crystallizer, has some back side cooling baths that signal is described as details on this sidewall.
Fig. 1 has described a kind of this continuous cast mold of being familiar with very much 1 that is used to make the conticaster of sheet billet, and what signal was described here is two broadside sidewalls 2 in the opposed broadside sidewall of complementation.These sidewalls side have within it formed a sprue cup 3, are used for holding unshowned submersed nozzle, then are provided with water-cooled cooling bath 4 (referring to Fig. 3) in its outside.Two opposed broadside sidewalls 2 of complementation are parallel to each other by the trend that sprue cup 3 stretches to the fringe region 5 on narrow limit respectively.On the continuous casting direction 6 under the sprue cup 3, the crystallizer sidewall becomes the cast cross section 7 (referring to Fig. 3) that size is determined gradually.
Be poured in the continuous cast mold 1 and on the height of liquid steel liquation at crystallizer of liquid level 8, descend and be cooled with rapid temperature, this temperature descends and produced the stress that causes longitudinal crack in the base shell of formation gradually on continuous casting direction 6, and these crackles may reach about 150mm especially below liquid level 8 in the base shell.According to the cast parameter, said liquid level 8 for example is 20 to 60mm apart from the distance of crystallizer upper limb, the cooling characteristics that has formed the liquid steel liquation of a temperature bulge 9 that signal is drawn in Fig. 2 on the crystallizer wallboard then forms thus, can definite temperature descend below the characteristic curve with this specific character is inferred thus.
Under traditional continuous cast mold situation, according to curve, for fear of occurring obviously descending with mould temperature after the temperature bulge 9, and the realization temperature-evenly, promptly, on the height of continuous cast mold, realize similar identical heat radiation, with popular so far, the profile phase ratio that with dashed lines is delineated out in Fig. 1, the back side 10 with 11 pairs of broadside sidewalls 2 of a kind of projected side wall reinforces, and this projected side wall diminishes on the continuous casting direction and big transition position 12 terminations (referring to Fig. 3) about the cast cross section of determining from sprue cup 3 to back to back size 7 of its wedge point gradually.This projected side wall 11 is placed in below the darkest liquid level approximately 20-50mm, for example in Fig. 3 according to the formed meniscus explanation of liquid level like that, its trend is corresponding on the width of crystallizer.Meanwhile, the termination 11a of this projected side wall 11 (rise very short one section connect with a transition position) is before it gradually becomes gradually little slope trend, also alarm into to the zone of temperature bulge 9 and be parallel to the crystallizer sidewall at this upper curtate and extend, development length 13 is approximately 20-100mm.
Based on this projected side wall 11 not only the height of continuous cast mold and also on the width all be change and on continuous casting direction 6, diminish gradually, has the section of thicker projected side wall, operating temperature has improved, thus particularly below " back leg " of temperature bulge 9 temperature of abrupt change descend and obviously to have weakened, that is, height and the heat radiation on the width at continuous cast mold 1 is uniform.
Claims (4)
1. continuous cast mold that is used to make slab, especially for the continuous cast mold of making sheet billet, it has the narrow avris wall and the broadside sidewall of water-cooled, wherein, in the broadside sidewall that it is made by copper coin, on the one hand forming a sprue cup inside in the middle of the parallel zone of leading to two narrow limits respectively, and on the other hand, outside or the back side be provided with cooling bath, it is characterized in that: one at the darkest liquid level place for maximum, the projected side wall (11) that diminishes gradually on continuous casting direction (6) is reinforced from the back side (10) of the darkest liquid level (8) below to broadside sidewall (2).
2. according to the continuous cast mold of claim 1, it is characterized in that: said projected side wall (11) from sprue cup (3) to go up in continuous casting direction (6) and its and then crystallizer petiolarea (7) up to transition position (12) diminish gradually.
3. according to the continuous cast mold of claim 1 or 2, it is characterized in that: said projected side wall (11) is corresponding in the width of crystallizer and the variation on the height with Temperature Distribution in crystallizer.
4. according to the continuous cast mold of one of claim 1 to 3, it is characterized in that: the trend of the termination (11a) of the projected side wall (11) that its length limits is parallel to the crystallizer sidewall.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 99128110 CN1188233C (en) | 1999-12-15 | 1999-12-15 | Continuous casting crystallizer |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 99128110 CN1188233C (en) | 1999-12-15 | 1999-12-15 | Continuous casting crystallizer |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN1303750A CN1303750A (en) | 2001-07-18 |
| CN1188233C true CN1188233C (en) | 2005-02-09 |
Family
ID=5284994
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN 99128110 Expired - Fee Related CN1188233C (en) | 1999-12-15 | 1999-12-15 | Continuous casting crystallizer |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN1188233C (en) |
Families Citing this family (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN101920317A (en) * | 2010-08-09 | 2010-12-22 | 河北文丰钢铁有限公司 | Rectangular casting blank crystallizer |
| CN102274934B (en) * | 2011-08-15 | 2013-04-24 | 钢铁研究总院 | Narrow copper plate with funnel-shaped curved surface and chamfered crystallizer |
-
1999
- 1999-12-15 CN CN 99128110 patent/CN1188233C/en not_active Expired - Fee Related
Also Published As
| Publication number | Publication date |
|---|---|
| CN1303750A (en) | 2001-07-18 |
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| C06 | Publication | ||
| PB01 | Publication | ||
| C10 | Entry into substantive examination | ||
| SE01 | Entry into force of request for substantive examination | ||
| C14 | Grant of patent or utility model | ||
| GR01 | Patent grant | ||
| C17 | Cessation of patent right | ||
| CF01 | Termination of patent right due to non-payment of annual fee |
Granted publication date: 20050209 Termination date: 20131215 |