CN102000789B - Continuous casting machine and small square billet soft reduction device - Google Patents
Continuous casting machine and small square billet soft reduction device Download PDFInfo
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- CN102000789B CN102000789B CN 201010578251 CN201010578251A CN102000789B CN 102000789 B CN102000789 B CN 102000789B CN 201010578251 CN201010578251 CN 201010578251 CN 201010578251 A CN201010578251 A CN 201010578251A CN 102000789 B CN102000789 B CN 102000789B
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Abstract
The invention relates to a small square billet continuous casting machine comprising a crystallizer, a strand support roller bed, a soft reduction device and a tension leveler, wherein the soft reduction device is arranged in a solidification tail end area of casting blanks and comprises at least one group of reduction units; each group of reduction units is a reduction system consisting of two pairs of upper compression rollers and lower compression rollers; the size of a roller gap formed between the upper compression roller and the lower compression rollers corresponds to the specification of the small square billets; and the length of the reducable interval of the soft reduction device is matched with the length of the solidification tail end area of the small square billets. The invention also relates to the soft reduction device of the small square billet continuous casting machine. The invention can improve the density inside the square billets, so that the phenomena of center porosity and center segregation of the small square billets can be effectively controlled.
Description
Technical field
The present invention relates to the metallurgical continuous casting field, particularly relate to a kind of conticaster and be applied to the little square billet soft reduction device of this conticaster.
Background technology
In field of iron and steel smelting, conticaster is used for molten steel is cast as solid shape.Referring to Fig. 1, existing conticaster is shown, comprise crystallizer 11, roller-way 12, light pressure device 13 and withdrawal straightening machine 14.The pouring molten steel of converter or electric furnace is in crystallizer 11, and crystallizer 11 is cast as it strands 15 such as slab or square billet, by the dummy bar (not shown) strand 15 is drawn to cooling forming on the roller-way 12.
But the upper pressure roller 131 of existing light screwdown gear 13 is installed in respectively on the different frame (not shown)s with lower compression roller 132, be subjected to the restriction of rack construction, the roller spacing is larger, but the pressure range that forms like this is also larger, and little square billet section is little, the pulling rate range is larger, but little square billet enters the pressure range of light screwdown gear 13, but cause pressure range and little square billet seriously do not mate, depress in the process in enforcement, cause easily the problems such as little square billet center segregation, center porosity, central pipe, have a strong impact on the quality of little square billet.
Summary of the invention
Technical problem to be solved by this invention provides a kind of conticaster, and this conticaster can improve the density of little square billet inside, and the center porosity of little square billet and center segregation are effectively controlled.
A kind of billet caster of the present invention, comprise crystallizer, casting stream depressing table, light screwdown gear and withdrawal straightening machine, light screwdown gear is arranged on the casting blank solidification end zone, light screwdown gear comprises that at least one group is depressed the unit, depress the press down system that the unit is comprised of two pairs of upper pressure rollers and lower compression roller for every group, the roll gap size that forms between upper pressure roller and the lower compression roller is corresponding with little square billet specification, but the pressure range of light screwdown gear size adapts with little square billet solidification end zone length.
Preferably, described light screwdown gear is implemented to depress in the interval of little square billet solidification end zone length 1.0-2.5m.
Preferably, described light screwdown gear overall reduction is 5-18mm.
Preferably, the frame upper end is provided with sensor and oil cylinder, and sensor detects the gap values between rollers of pressure roller and lower compression roller not in the error range that setting value allows, the position movement of control oil cylinder, the opening degree of pressure roller and lower compression roller in the adjustment.
Preferably, at least two of described screwdown gear pairs of depress rollers concentrate in the frame.
Preferably, the driven roller of described withdrawal straightening machine and screwdown gear is used for controlling the casting speed of little square billet, and in little square billet solidification end two-phase section scope, at least two pairs of depress rollers are implemented to depress to little square billet.
Preferably, the roller of described upper pressure roller and lower compression roller footpath scope is diameter 420-500mm.
The present invention also provides a kind of light screwdown gear, and this light screwdown gear can improve the density of little square billet inside, and the center porosity of little square billet and center segregation are effectively controlled.
The light screwdown gear of a kind of conticaster of the present invention comprises that at least two groups gently depress the unit, gently depresses the unit for every group and is comprised of a pair of upper pressure roller and lower compression roller, and the interval size of the roll gap depressed that forms between upper pressure roller and the lower compression roller and little square billet specification adapt.
Preferably, at least two of described screwdown gear groups are depressed the unit and are concentrated in the frame.
Preferably, the driven roller of described withdrawal straightening machine and screwdown gear is used for controlling the casting speed of little square billet, and in little square billet solidification end two-phase section scope, at least two groups are gently depressed the unit little square billet is implemented to depress.
Compared with prior art, the present invention has the following advantages:
But the pressure range of the light screwdown gear of conticaster of the present invention size adapts with little square billet, can improve and depress efficient, avoids cracking on little square billet surface.The roller footpath of the upper pressure roller of the light screwdown gear of cause and lower compression roller is larger, can effectively overcome little square billet corner resistance when depressing, and effectively enforcement is gently depressed.
It is densely arranged that each group of the present invention is gently depressed the unit, by the control Casting speed, can in little square billet solidification end two-phase section scope, guarantee that at least two groups are gently pressed the unit that little square billet is implemented to depress, improve the density of little square billet inside, the center porosity of little square billet and center segregation are effectively controlled.
The light screwdown gear of the present invention is implemented to depress in the interval that little square billet solidifies latter end zone 1.0-2.5m, and overall reduction is at 5-18mm.Depress by effective enforcement, the solidification shrinkage that little square billet solidification end is produced is compensated, and reduces or has stoped flowing of liquid molten steel, makes the center segregation of little square billet and loose to elimination or alleviate.
Description of drawings
In order to be illustrated more clearly in the technical scheme in the embodiment of the invention, the below will do to introduce simply to the accompanying drawing of required use among prior art and the embodiment, apparently, accompanying drawing in the following describes only is some embodiments of the present invention, for those of ordinary skills, under the prerequisite of not paying creative work, can also obtain according to these accompanying drawings other accompanying drawing.
Fig. 1 is existing continuous casting machine structure cutaway view;
Fig. 2 is continuous casting machine structure cutaway view of the present invention;
Fig. 3 is the rack construction cutaway view of light screwdown gear;
Fig. 4 is light screwdown gear the first example structure cutaway view of the present invention;
Fig. 5 is light screwdown gear the second example structure cutaway view of the present invention;
Fig. 6 is light screwdown gear the 3rd example structure cutaway view of the present invention.
The specific embodiment
For above-mentioned purpose of the present invention, feature and advantage can be become apparent more, the present invention is further detailed explanation below in conjunction with the drawings and specific embodiments.
Referring to Fig. 2, conticaster of the present invention is shown, comprise crystallizer 11, roller-way 12, light screwdown gear 23 and withdrawal straightening machine 14.It is terminal that light screwdown gear 23 is arranged on casting stream, comprises that six groups are gently depressed the unit, gently depresses the unit for every group and be comprised of the upper pressure roller 231 and the lower compression roller 232 that are arranged on the frame (not shown).Upper pressure roller 231 and lower compression roller 232 are arranged on the frame, can be so that the roller spacing of pressure roller 231 and lower compression roller 232 be less on every group on the frame for movement, and the roller of upper pressure roller 231 and lower compression roller 232 footpath is larger, diameter 420-500mm, like this, but less in the pressure range that upper pressure roller 231 and lower compression roller 232 form is fit to little square billet compacting.
When little square billet is drawn out in crystallizer 11, little square billet is in the outside and solidifies, inner liquefaction, after roller-way 12 moves a period of times, but enter in the pressure range of light screwdown gear 23, but should the pressure range size adapt with little square billet, can improve and depress efficient, avoid cracking on little square billet surface.Larger because of the roller footpath of upper pressure roller 231 and lower compression roller 232, when depressing, can effectively overcome little square billet corner resistance, effectively enforcement is gently depressed.
The light unit of pressing of each group of the present invention is densely arranged, pulling rate by control withdrawal straightening machine 14, can be in little square billet solidification end two-phase section scope, at least guarantee that two groups are gently pressed the unit that little square billet is implemented to depress, improve the density of little square billet inside, the center porosity of little square billet and center segregation are effectively controlled.
Light screwdown gear 23 is implemented to depress in the interval that little square billet solidifies latter end zone 1.0-2.5m, and overall reduction is at 5-18mm.Depress by effective enforcement, the solidification shrinkage that little square billet solidification end is produced is compensated, and reduces or has stoped flowing of liquid molten steel, makes the center segregation of little square billet and loose to elimination or alleviate.
Referring to Fig. 3, the rack construction of light pressure device 23 is shown.Frame 33 upper ends are provided with oil cylinder 32 and sensor 31, and driven roller 34 is installed in the middle of the frame 33, and driven roller connects motor 35 and reductor 36, and frame 33 belows are equipped with pressure roller 231 and lower compression roller 232.
Sensor 31 detects the gap values between rollers of upper pressure roller 231 and lower compression roller 232, when this slit value is not within the error range that setting value allows, and the position movement of control oil cylinder 32, the slit in the adjustment between pressure roller 231 and the lower compression roller 232 implements to depress.Motor 35 and reductor 36 drive driven roller 34, drive the strand motion.
Referring to Fig. 4, Fig. 5 and Fig. 6, the present invention can one depresses the unit and is arranged in the frame 33, also can depress the unit or a plurality of unit of depressing is arranged in the frame 33 with two.
Need to prove, in this article, relational terms such as the first and second grades only is used for an entity or operation are made a distinction with another entity or operation, and not necessarily requires or hint and have the relation of any this reality or sequentially between these entities or the operation.And, term " comprises ", " comprising " or its any other variant are intended to contain comprising of nonexcludability, thereby not only comprise those key elements so that comprise process, method, article or the equipment of a series of key elements, but also comprise other key elements of clearly not listing, or also be included as the intrinsic key element of this process, method, article or equipment.Do not having in the situation of more restrictions, the key element that is limited by statement " comprising ... ", and be not precluded within process, method, article or the equipment that comprises described key element and also have other identical element.
The above is preferred embodiment of the present invention only, is not for limiting protection scope of the present invention.All any modifications of doing within the spirit and principles in the present invention, be equal to replacement, improvement etc., all be included in protection scope of the present invention.
Claims (2)
1. billet caster, comprise crystallizer, casting stream depressing table, light screwdown gear and withdrawal straightening machine, light screwdown gear is arranged on the casting blank solidification end zone, it is characterized in that, light screwdown gear comprises that at least one group is depressed the unit, depress the press down system that the unit is comprised of two pairs of upper pressure rollers and lower compression roller for every group, the roll gap that forms between upper pressure roller and lower compression roller size is corresponding with little square billet specification, but the pressure range of light screwdown gear size adapts with little square billet solidification end zone length;
Described light screwdown gear is implemented to depress in the interval of little square billet solidification end zone length 1.0-2.5m;
At least two pairs of depress rollers of described light screwdown gear concentrate in the frame; The roller footpath scope of described upper pressure roller and lower compression roller is diameter 420-500mm, and described light screwdown gear overall reduction is 5-18mm;
The driven roller of described withdrawal straightening machine and screwdown gear is used for controlling the casting speed of little square billet, to guarantee that in little square billet solidification end two-phase section scope at least two pairs of depress rollers are implemented to depress to little square billet.
2. conticaster as claimed in claim 1, it is characterized in that the frame upper end is provided with sensor and oil cylinder, sensor detects the gap values between rollers of pressure roller and lower compression roller not in the error range that setting value allows, the position movement of control oil cylinder, the opening degree of pressure roller and lower compression roller in the adjustment.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 201010578251 CN102000789B (en) | 2010-12-08 | 2010-12-08 | Continuous casting machine and small square billet soft reduction device |
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| Application Number | Priority Date | Filing Date | Title |
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| CN 201010578251 CN102000789B (en) | 2010-12-08 | 2010-12-08 | Continuous casting machine and small square billet soft reduction device |
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| CN102000789A CN102000789A (en) | 2011-04-06 |
| CN102000789B true CN102000789B (en) | 2013-01-30 |
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Families Citing this family (9)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102303102B (en) * | 2011-09-30 | 2013-09-18 | 中冶南方工程技术有限公司 | Continuous casting process and continuous casting machine for extra-thick plate blank |
| CN103128237B (en) * | 2011-12-02 | 2014-08-06 | 中冶赛迪工程技术股份有限公司 | Extremely-thick slab caster and method for producing extremely-thick slabs thereof |
| CN103506586B (en) * | 2012-06-20 | 2016-01-20 | 鞍钢股份有限公司 | Continuous casting method for improving central shrinkage cavity of high-carbon steel billet |
| CN104001891B (en) * | 2014-06-17 | 2016-08-31 | 中冶连铸技术工程有限责任公司 | On-Line Control Method under a kind of continuous small-billet casting dynamic soft-reduction and weight |
| CN104148604B (en) * | 2014-08-22 | 2016-04-06 | 中冶连铸技术工程有限责任公司 | Column integration pony roll spacing dynamic draught withdrawal straightening machine altogether |
| CN104722731A (en) * | 2015-04-17 | 2015-06-24 | 中冶赛迪工程技术股份有限公司 | Method for eliminating central looseness of casting blank and improving density of casting blank |
| CN105344957B (en) * | 2015-11-10 | 2018-02-09 | 中冶京诚工程技术有限公司 | Fan-shaped section type withdrawal and straightening device and withdrawal and straightening equipment |
| CN109261920B (en) * | 2018-10-26 | 2021-03-23 | 中冶连铸技术工程有限责任公司 | Method and equipment for continuous casting of small square billet by single roller |
| CN109732049A (en) * | 2019-02-21 | 2019-05-10 | 东北大学 | A kind of vertical throwing conticaster of small billet and soft reduction process device |
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| US20020189783A1 (en) * | 2001-06-19 | 2002-12-19 | Michael Poran | Continuous casting apparatus with soft reduction |
| DE10236367A1 (en) * | 2002-08-08 | 2004-02-19 | Sms Demag Ag | Dynamic control of a casting strand made from steel on both sides of roll segments used in a continuous casting installation comprises using the roll segments in a cold strand, hot strand and/or soft reduction region |
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| CN102000789A (en) | 2011-04-06 |
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