CN102601333A - Method for controlling bulging of narrow surface of extra-thick plate blank with thickness of 400mm - Google Patents
Method for controlling bulging of narrow surface of extra-thick plate blank with thickness of 400mm Download PDFInfo
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- CN102601333A CN102601333A CN2011104081396A CN201110408139A CN102601333A CN 102601333 A CN102601333 A CN 102601333A CN 2011104081396 A CN2011104081396 A CN 2011104081396A CN 201110408139 A CN201110408139 A CN 201110408139A CN 102601333 A CN102601333 A CN 102601333A
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Abstract
A method for controlling bulging of a narrow surface of an extra-thick plate blank with the thickness of 400mm belongs to the technical field of continuous casting of steelmaking. Technological steps include that a crystallizer narrow-surface copper plate of the extra-thick plate blank with the thickness of 400mm is adjusted into a multi-tapered shape from a straight plate shape, different taper degrees are adopted according to different steel types, the taper degree of low-carbon steel ranges from 1.5% to 1.6%, the taper degree for medium-carbon steel ranges from 1.45% to 1.55%, and the taper degree for high-carbon steel ranges from 1.4% to 1.5%; a spraying rack is lengthened, the length of the spraying rack is increased to the range from 1500mm to 1600mm from the original range from 1200mm to 1300mm; and simultaneously, the types of 6 to 8 nozzles are adjusted, an original fan-shaped spraying angle is adjusted into an elliptical spraying angle, the spraying area of the modified spraying frame is increased, the modified spraying frame realizes cooling more uniformly, accordingly, the cooling strength of the narrow surface of the casting blank is improved, and the method is favorable for reducing bulging. The method has the advantages that the quantity of bulging of the casting blank is controlled within 4mm, and the steel passing capacity of a crystallizer is increased.
Description
Technical field
The invention belongs to the steel-making continuous casting technical field, a kind of method of effective control 400mm extra-thick plate blank leptoprosopy bulge particularly is provided
Background technology
Relevant document points out that bending theory of beam is followed in the casting blank bulging distortion, and the thickness of strand is big more, and leptoprosopy bulge amount is big more, and the mode that general normal employing increases conical degree of crystallizer solves the leptoprosopy bulge of strand.For the 400mm extra-thick plate blank,, must adopt big tapering in order to alleviate the bulge of strand.But crystallizer narrow copper plate serious wear greatly reduced the steel transportation amount of crystallizer when tapering was excessive, thereby had increased equipment maintenance cost.To this technical barrier; Domestic many steel mills have introduced many taperings of Diaface crystallizer: the crystallizer narrow copper plate of the type is made up of two parabolas; Its slope reduces gradually; The process of setting of this and base shell matches, and makes to contact more fully between copper coin and the base shell, reduces the possibility that forms bulge theoretically.The copper coin two bottom sides has been carried out special processing, makes the strand bight not reach copper coin, therefore even taper value is bigger, and the copper coin bottom of also can not wearing and tearing, thus guaranteed the steel transportation amount of crystallizer.But the domestic 400mm of being directed to extra-thick plate blank does not also use the precedent of many taperings of Diaface crystallizer, and the leptoprosopy bulge that how to alleviate the 400mm extra-thick plate blank is still the technological difficulties that needs overcome.
Summary of the invention
The purpose of this invention is to provide a kind of method of the 400mm of control extra-thick plate blank leptoprosopy bulge, the casting blank bulging amount is controlled in the 4mm, thus the steel transportation amount of raising crystallizer.Concrete processing step is:
(1) the crystallizer narrow copper plate of 400mm extra-thick plate blank is adjusted into many taperings type by board-type, and Fig. 1 is many taperings crystallizer sketch map.And, adopt no tapering: mild steel tapering 1.5%-1.6%, medium carbon steel 1.45%-1.55%, high-carbon steel 1.4%-1.5% according to different steel grades.
(2) in order further to alleviate the leptoprosopy bulge of 400mm extra-thick plate blank, leptoprosopy foot roller spray frame is carried out research of technique, increase the length of spray frame, as shown in Figure 2, spray frame length is increased to 1500-1600mm by original 1200-1300mm; Adjust the model of 6-8 nozzle simultaneously, the spray angle is by the original fan-shaped ellipse that is adjusted into, and like Fig. 3, shown in Figure 4, improved spray frame has increased spray area, cool off more even, thereby improved the intensity of cooling of strand leptoprosopy, help alleviating bulge.
Description of drawings
Fig. 1 is many taperings crystallizer sketch map.Wherein, the part 1 of narrow copper plate processing removal.
Fig. 2 newly sprays frame and new nozzle sketch map for sufficient roller.Wherein, newly spray frame 2, old nozzle 3, new nozzle 4.
Fig. 3 is an old nozzle spray area sketch map (spray area is fan-shaped).
Fig. 4 is new nozzle spray area sketch map (spray area is for oval).
Fig. 5 is for using straight plate crystallizer strand leptoprosopy bulge situation.
Fig. 6 uses many taperings crystallizer strand leptoprosopy bulge situation
Fig. 7 uses many taperings crystallizer, newly sprays frame strand leptoprosopy bulge situation.
The specific embodiment
The extra-thick plate blank of 400mm specifications section; All use many taperings of Diaface crystallizer, improved new spray frame, and confirm corresponding taper value according to concrete steel grade: with medium carbon steel example, steel grade Q235C-1; Casting blank section 400 * 2000mm, the step and the mode that solve strand leptoprosopy bulge are:
(1) the crystallizer narrow copper plate is adjusted into many taperings type by board-type, and Fig. 6, Fig. 7 are respectively the leptoprosopy bulge situation of strand when using straight plate crystallizer and many taperings crystallizer, and straight plate conical degree of crystallizer is 1.25%, bulge amount 22mm; Many taperings conical degree of crystallizer is 1.5%, bulge amount 13mm, and visible, the bulge situation is greatly improved.
(2), use improved new spray frame, and use many taperings crystallizer simultaneously for the steel grade of identical specifications section; Fig. 7 is for using many taperings crystallizer, newly spraying 400mm extra-thick plate blank leptoprosopy bulge situation behind the frame; Conical degree of crystallizer 1.5% newly sprays frame length 1515mm, bulge amount 4mm; It is thus clear that the leptoprosopy bulge is under control basically.
Claims (1)
1. method of controlling 400mm extra-thick plate blank leptoprosopy bulge is characterized in that processing step is:
(1) the crystallizer narrow copper plate of 400mm extra-thick plate blank is adjusted into many taperings type by board-type, and according to different steel grades, adopts no tapering: mild steel tapering 1.5%-1.6%, medium carbon steel 1.45%-1.55%, high-carbon steel 1.4%-1.5%;
(2) increase the length that sprays frame, spray frame length is increased to 1500-1600mm by original 1200-1300mm; Adjust the model of 6-8 nozzle simultaneously, the spray angle is by the original fan-shaped ellipse that is adjusted into, and improved spray frame has increased spray area, cool off more even, thereby improved the intensity of cooling of strand leptoprosopy, help alleviating bulge.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201110408139.6A CN102601333B (en) | 2011-12-09 | 2011-12-09 | Method for controlling bulging of narrow surface of extra-thick plate blank with thickness of 400mm |
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| Application Number | Priority Date | Filing Date | Title |
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| CN201110408139.6A CN102601333B (en) | 2011-12-09 | 2011-12-09 | Method for controlling bulging of narrow surface of extra-thick plate blank with thickness of 400mm |
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| Publication Number | Publication Date |
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| CN102601333A true CN102601333A (en) | 2012-07-25 |
| CN102601333B CN102601333B (en) | 2014-01-29 |
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| CN201110408139.6A Active CN102601333B (en) | 2011-12-09 | 2011-12-09 | Method for controlling bulging of narrow surface of extra-thick plate blank with thickness of 400mm |
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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN105817594A (en) * | 2015-01-07 | 2016-08-03 | 上海梅山钢铁股份有限公司 | Intensive cooling control device and control method of microalloyed steel continuous casting slab corners in vertical bending segment |
Citations (4)
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| JP2001138019A (en) * | 1999-11-16 | 2001-05-22 | Sumitomo Metal Ind Ltd | Continuous casting method |
| CN101642804A (en) * | 2009-09-09 | 2010-02-10 | 北京科技大学 | Method for realizing continuous casting plate bank uniform secondary cooling |
| CN101992275A (en) * | 2010-11-26 | 2011-03-30 | 首钢总公司 | Method for controlling narrow face bulging of thick continuous casting slab |
| CN102019390A (en) * | 2010-12-31 | 2011-04-20 | 山东泰山钢铁集团有限公司 | Online austenitic stainless steel continuous casting plate blank water-spraying cooling method and special device thereof |
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2011
- 2011-12-09 CN CN201110408139.6A patent/CN102601333B/en active Active
Patent Citations (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JP2001138019A (en) * | 1999-11-16 | 2001-05-22 | Sumitomo Metal Ind Ltd | Continuous casting method |
| CN101642804A (en) * | 2009-09-09 | 2010-02-10 | 北京科技大学 | Method for realizing continuous casting plate bank uniform secondary cooling |
| CN101992275A (en) * | 2010-11-26 | 2011-03-30 | 首钢总公司 | Method for controlling narrow face bulging of thick continuous casting slab |
| CN102019390A (en) * | 2010-12-31 | 2011-04-20 | 山东泰山钢铁集团有限公司 | Online austenitic stainless steel continuous casting plate blank water-spraying cooling method and special device thereof |
Non-Patent Citations (3)
| Title |
|---|
| 蔡开科: "《连铸坯质量控制》", 31 May 2010, 冶金工业出版社 * |
| 许晓东等: "连铸新技术在首钢400mm特厚板坯生产中的应用", 《连铸（增刊）》 * |
| 马瑞金等: "特厚板坯连铸质量缺陷及控制", 《连铸（增刊）》 * |
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN105817594A (en) * | 2015-01-07 | 2016-08-03 | 上海梅山钢铁股份有限公司 | Intensive cooling control device and control method of microalloyed steel continuous casting slab corners in vertical bending segment |
| CN105817594B (en) * | 2015-01-07 | 2018-01-19 | 上海梅山钢铁股份有限公司 | Found curved segment cold control device and control method by force in micro-alloyed steel continuous casting slab corner |
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| CN102601333B (en) | 2014-01-29 |
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Address after: 066326 Du Zhuang Township, Funing County, Qinhuangdao, Hebei Co-patentee after: Shougang Group Co. Ltd. Patentee after: Qinhuangdao Shouqin Metal Material Co., Ltd. Address before: 066326 Du Zhuang Township, Funing County, Qinhuangdao, Hebei Co-patentee before: Capital Iron & Steel General Company Patentee before: Qinhuangdao Shouqin Metal Material Co., Ltd. |
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Effective date of registration: 20190408 Address after: 100041 Shijingshan Road, Shijingshan District, Shijingshan District, Beijing Patentee after: Shougang Group Co. Ltd. Address before: 066326 Du Zhuang Township, Funing County, Qinhuangdao, Hebei Co-patentee before: Shougang Group Co. Ltd. Patentee before: Qinhuangdao Shouqin Metal Material Co., Ltd. |
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