CN102806324A - Double clapboard flow distribution device for thin-strip continuous casting - Google Patents
Double clapboard flow distribution device for thin-strip continuous casting Download PDFInfo
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- CN102806324A CN102806324A CN2011101422914A CN201110142291A CN102806324A CN 102806324 A CN102806324 A CN 102806324A CN 2011101422914 A CN2011101422914 A CN 2011101422914A CN 201110142291 A CN201110142291 A CN 201110142291A CN 102806324 A CN102806324 A CN 102806324A
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Abstract
The invention relates to a double clapboard flow distribution device for thin-strip continuous casting. The double clapboard flow distribution device comprises a flow distributor body, a first clapboard and a second clapboard, wherein the flow distributor body has a box body structure of which the upper end is provided with an opening, lower parts of side walls at two ends are arranged in a step type, and the bottom of the body has a closed-angle conical structure; two side walls of the lower part of the body are provided with a plurality of discharge holes at intervals along the length direction; the first clapboard and the second clapboard are arranged on the middle part and the lower part in the distributor body up and down respectively, so that a cavity of the distributor body is divided into an upper cavity, a middle cavity and a lower cavity; the first clapboard is provided with two rows of steel passing holes; the cross section of the second clapboard is in an inverted T shape; steel accommodating chambers are formed on two sides of the lower side of the first clapboard of the cavity of the distributor body respectively and consist of the first clapboard, the second clapboard, vertical clapboards and the side walls of two ends of the distributor body; side steel passing holes are formed on two sides of the first clapboard corresponding to the steel accommodating chambers respectively; and edge discharge holes which face side closing plates are formed at the bottoms of the steel accommodating chambers. By the double clapboard flow distribution device, molten steel which flows into a flow distributor from a water gap can be buffered, and the tapping amount of the discharge holes and the flow speed of the molten steel can be reduced effectively.
Description
Technical field
The present invention relates to the twin-roll thin strip continuous casting field, the two dividing plate flow distribution devices of particularly a kind of thin strap continuous casting.
Background technology
Twin-roll thin strip continuous casting is that the casting rolls that rotates with two rightabouts is a crystallizer, and the liquid metal Direct Production is become the growth technique of thickness less than 10mm strip steel.Compare with traditional strip production technology, this technology has shortened process, energy savings, reduces production costs and improves advantages such as made-up belt mechanical property.
Strip casting process is one and not only had been related but also distinguishing strip casting process with traditional continuous casting.Its main technique is after molten steel is injected into tundish; Through the mouth of a river molten steel is assigned in the current distribution device; Be injected in the bath that two water-cooled crystallization rollers and side seal board surround by current distribution device, molten steel solidifies gradually on the surface of two crystallization rollers and forms the base shell, after solidifying fully near two crystallization roller lines again; Rolling effect takes place in the backward rotation through two rollers, forms the compact metal band with certain thickness and width.
Reasonably the cloth streaming system has very important significance for twin-roll thin strip continuous casting.This is because the cloth streaming system directly has influence on the quality of strip product, and according to bibliographical information, bath liquid fluctuating amplitude surpasses ± and during 2mm, longitudinal crack will appear in made-up belt; But bath liquid level fluid mass is too tranquil, is unfavorable for the renewal of bath top molten steel again, causes the liquid level crust easily, and therefore how keeping the balance between the two is to water the precondition that outpours qualified strip.
In the disclosed patent of current distribution device, mainly contain three pack arrangements, two pack arrangements and single packet form at present, division is following:
(1) three pack arrangement
Current distribution device three pack arrangements, promptly tundish, transition bag, three containers of current distribution device are formed, and connect through the big or small mouth of a river between three melted steel containers; It is inner that molten steel flows into current distribution device through the transition water-coating port; The current distribution device bottom has the hole that spues, and about the form in the hole that spues, mainly contains two kinds of forms at present; The hole that promptly spues is downward, and impact direction is the roll gap direction; Spue the hole towards roll surface, obtain with the crystallization roller and be certain angle.
Such current distribution device form has following deficiency:
1, structure is more, has increased the extra transit link of equipment;
2, the increase of middle transition bag will increase its installation difficulty, when landing, need be equipped with other mechanism;
3, because molten steel directly drops in the current distribution device of below through narrow slit, the fluctuation of the current distribution device inside that excessive drop causes is also bigger, the effect of flat rapids;
(2) two pack arrangements
The characteristics of the type current distribution device mainly are that tundish and two melted steel containers of current distribution device are formed, and utilize the mouth of a river to be connected between the two.At porous refractory plate of the bottom of current distribution device tiling; Molten steel at first arrives on the porous refractory plate after flowing out through the mouth of a river of tundish, and the porous material plate has flat preferably rapids effect; Then molten steel flows into the current distribution device bottom through aperture, flows out in the molten steel bath through aperture.
The main deficiency of the type current distribution device is:
Although 1 porous refractory plate has well flat rapids effect, under the pouring condition of big flow, high pulling rate, current distribution device takes place excessive because the steel-passing amount of refractory plate is limited easily;
2, the porous refractory plate is carried molten steel through micropore, runs into the molecule field trash in the molten steel, will form obstruction, influences the amount of passing through of molten steel gradually;
3, can the porous refractory plate suitable passes through the molten steel checking of still needing.
(3) single pack arrangement
The characteristics of the type current distribution device are that melted steel container has only tundish, flows in the molten bath between two rollers through mouth of a river cloth.The advantage of this structure is: form is simple, at the bottom of the cost; Shortcoming is: fluctuating and solidifying uniformity is difficult to control.
Summary of the invention
The objective of the invention is to design the two dividing plate flow distribution devices of a kind of thin strap continuous casting, can make the molten steel that flows in the current distribution device from the mouth of a river obtain buffering; Can effectively reduce spue hole tap and molten steel flow velocity.
For achieving the above object, technical scheme of the present invention is:
The two dividing plate flow distribution devices of a kind of thin strap continuous casting, it comprises, the current distribution device body, it is the body structure of an open upper end, and the two ends lower sidewall is that stepped ramp type is arranged, and the body bottom is a wedge angle pyramidal structure; Two side, body bottom is offered some holes that spue along its length at interval; First, second dividing plate, be arranged in the current distribution device body respectively up and down in, the bottom, following three chambers during current distribution device body cavity is separated into, upper chamber be the rapid groove that disappears, the middle part chamber is the doab, but lower chamber is rapid chamber; First dividing plate is offered the steel passing hole that two rows are provided with at interval along its length; The second partition section is an inverted T-shaped, and the intermediate projections part is the micropore of a row interval setting along its length, the steel passing hole of second partition both sides recess correspondence top first dividing plate; Both sides are established the Rong Gang chamber respectively under current distribution device body cavity first dividing plate, and this Rong Gang chamber is made up of first, second dividing plate, vertical clapboard and current distribution device body two ends sidewall, and the first dividing plate both sides that should the Rong Gang chamber are offered the side steel passing hole respectively; Rong Gang chamber bottom is that sidewall stepped ramp type bottom, current distribution device body two ends has towards the limit of side seal board the portion hole that spues.
Further, described steel passing hole, side steel passing hole are circular hole, slot, square hole, elliptical aperture.
The hole that spues, described current distribution device body bottom, its direction becomes 25 °～165 ° angles with the crystallization roll axis.
The described hole that spues, limit portion spue that being shaped as of hole is fan-shaped, rectangle, square, circle, semicircle or slit-type.
Getting into the inner molten steel of current distribution device through the flowing water mouth goes out through pressing down the rapids back orifice flow that spues bottom the current distribution device for three times.
There is certain gap between first, second dividing plate so that the micropore that molten steel is distinguished from the second partition protrusion flows down; The side steel passing hole of corresponding first dividing plate in top, Rong Gang chamber, the bottom has the jet orifice towards side seal board, and during big flow, the indoor molten steel liquid level of Rong Gang rises, and flows into the doab from return port when surpassing the return port height.
The present invention is a grooved container, and both sides are provided with the step end face; Set inside has two dividing plates, and the molten steel that makes the mouth of a river fall to current distribution device is set up certain liquid level above first dividing plate, thereby makes the molten steel mean allocation that falls from the first dividing plate both sides aperture to foot passage, and the dividing plate both sides have circular hole.The molten steel that falls through first dividing plate, two mother rib lateral rotundums accumulates in the Rong Gang chamber, both sides; Because this Rong Gang chamber given volume; Bottom the limit portion facing to the side seal board both sides of the having hole that spues; Too much molten steel flows in the Rong Gang chamber, middle part through the aperture of vertical clapboard both sides, and the hole keeps constant steel flow velocity degree thereby the limit portion that keeps the bottom to rush at side seal board spues.First dividing plate below is for having the second partition of micropore; The second partition bottom is for having the current distribution device kerve in the hole that spues; Molten steel is through getting into the concave area of convex second partition behind the first membrane front face steel passing hole; Then along with the gathering of molten steel, flow into pressing down the rapid groove of current distribution device bottom from the micropore of the bossing at second partition middle part, portion's orifice flow that spues goes out from the limit then.
The invention has the advantages that:
1. mechanism is simple, has saved the link of transition bag, has practiced thrift operation and refractory material.
2. the interpolation of current distribution device internal partition, inhomogeneous the flowing of can the efficient buffer mouth of a river effluenting.
Current distribution device first and second press down the design of rapid chamber, make the logical influence that does not receive the molten steel circulation of limit portion of current distribution device middle part steel flow.
4. the design of Rong Gang chamber, side, current distribution device both sides, the supply high-temperature molten steel that can not stop for side seal edges of boards portion molten steel.
5. the current distribution device limit portion design in hole that spues can realize that high-temperature molten steel is the heat supply of triangle molten bath from top.
6. triple designs that press down rapid chamber of current distribution device and the bottom design in hole that spues can make steadily cloth stream uniformly of molten steel.
Description of drawings
Fig. 1 is the schematic perspective view of one embodiment of the invention.
Fig. 2 is the front view of Fig. 1.
Fig. 3 is the vertical view of Fig. 2.
Fig. 4 is the A-A cutaway view of Fig. 2.
Fig. 5 is the B-B cutaway view of Fig. 3.
Fig. 6 is the three-dimensional cutaway view of one embodiment of the invention.
The specific embodiment
Referring to Fig. 1～Fig. 6, the two dividing plate flow distribution devices of a kind of thin strap continuous casting of the present invention, it comprises, current distribution device body 1, first, second dividing plate 2,3.
Current distribution device body 1, it is the body structure of an open upper end, and the two ends lower sidewall is that stepped ramp type is arranged, and the body bottom is a wedge angle pyramidal structure; Two side, body bottom is offered some holes 11 that spue along its length at interval.
First, second dividing plate 2,3, be arranged in the current distribution device body 1 respectively up and down in, the bottom, following three chambers during current distribution device body 1 cavity is separated into, upper chamber 101 be the rapid groove that disappears, middle part chamber 102 is the doab, but lower chamber 103 is rapid chamber; First dividing plate 2 is offered the steel passing hole 21,22 that two rows are provided with at interval along its length; Second partition 3 sections are inverted T-shaped, and the intermediate projections part is the micropore 31 of a row interval setting along its length, the steel passing hole 21,22 of recess correspondences top, second partition 3 both sides first dividing plate 2.
2 times both sides of current distribution device body 1 cavity, first dividing plate are established Rong Gang chamber 4,4 ' respectively; This Rong Gang chamber 4,4 ' by first, second dividing plate 2,3, vertical clapboard 5,5 ' and current distribution device body 1 two ends sidewall form, to should the Rong Gang chamber 4,4 ' first dividing plate, 2 both sides offer side steel passing hole 23,23 ' respectively; Rong Gang chamber 4,4 ' bottom are that sidewall stepped ramp type bottom, current distribution device body two ends has towards the limit of side seal board the portion hole 6,6 ' that spues.
Described steel passing hole, side steel passing hole are circular hole, slot, square hole, elliptical aperture.
The hole that spues, described current distribution device body bottom, its direction becomes 25 °～165 ° angles with the crystallization roll axis.
The described hole that spues, limit portion spue that being shaped as of hole is fan-shaped, rectangle, square, circle, semicircle or slit-type.
The molten steel that falls to current distribution device from the mouth of a river is set up certain liquid level above first dividing plate, thereby makes the molten steel mean allocation that falls from the first dividing plate both sides steel passing hole to foot passage, and the dividing plate both sides have circular hole.The molten steel that falls through first dividing plate, two mother rib lateral rotundums accumulates in the Rong Gang chamber, both sides; Because this Rong Gang chamber given volume; Bottom the limit portion facing to the side seal board both sides of the having hole that spues; Too much molten steel flows in the Rong Gang chamber, middle part through the aperture of vertical clapboard both sides, thereby the tapping aperture that keeps the bottom to rush at side seal board keeps constant steel flow velocity degree.First dividing plate below is a convex second partition that has micropore; The second partition bottom is for having the current distribution device kerve in the hole that spues; Molten steel is through getting into the concave area of second partition behind the first dividing plate steel passing hole; Then along with the gathering of molten steel, flow into pressing down the rapid groove of current distribution device bottom from the micropore of the bossing at second partition middle part, portion's orifice flow that spues goes out from the limit then.
Claims (4)
1. the two dividing plate flow distribution devices of thin strap continuous casting is characterized in that, comprise,
The current distribution device body, it is the body structure of an open upper end, and the two ends lower sidewall is that stepped ramp type is arranged, and the body bottom is a wedge angle pyramidal structure; Two side, body bottom is offered some holes that spue along its length at interval;
First, second dividing plate, be arranged in the current distribution device body respectively up and down in, the bottom, following three chambers during current distribution device body cavity is separated into, upper chamber be the rapid groove that disappears, the middle part chamber is the doab, but lower chamber is rapid chamber; First dividing plate is offered the steel passing hole that two rows are provided with at interval along its length; The second partition section is an inverted T-shaped, and the intermediate projections part is the micropore of a row interval setting along its length, the steel passing hole of second partition both sides recess correspondence top first dividing plate;
Both sides are established the Rong Gang chamber respectively under current distribution device body cavity first dividing plate, and this Rong Gang chamber is made up of first, second dividing plate, vertical clapboard and current distribution device body two ends sidewall, and the first dividing plate both sides that should the Rong Gang chamber are offered the side steel passing hole respectively; Rong Gang chamber bottom is that sidewall stepped ramp type bottom, current distribution device body two ends has towards the limit of side seal board the portion hole that spues.
2. the two dividing plate flow distribution devices of thin strap continuous casting as claimed in claim 1 is characterized in that described steel passing hole, side steel passing hole are circular hole, slot, square hole, elliptical aperture.
3. the two dividing plate flow distribution devices of thin strap continuous casting as claimed in claim 1 is characterized in that, the hole that spues, described current distribution device body bottom, and its direction and crystallization roll axis are 25 °～165 °.
4. like the two dividing plate flow distribution devices of claim 1 or 3 described thin strap continuous castings, it is characterized in that the described hole that spues, limit portion spue that being shaped as of hole is fan-shaped, rectangle, square, circle, semicircle or slit-type.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201110142291.4A CN102806324B (en) | 2011-05-30 | 2011-05-30 | Double clapboard flow distribution device for thin-strip continuous casting |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201110142291.4A CN102806324B (en) | 2011-05-30 | 2011-05-30 | Double clapboard flow distribution device for thin-strip continuous casting |
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| CN102806324A true CN102806324A (en) | 2012-12-05 |
| CN102806324B CN102806324B (en) | 2014-12-24 |
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| CN201110142291.4A Active CN102806324B (en) | 2011-05-30 | 2011-05-30 | Double clapboard flow distribution device for thin-strip continuous casting |
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Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN108015243A (en) * | 2016-10-31 | 2018-05-11 | 宝山钢铁股份有限公司 | A kind of twin-roll thin strip continuous casting air blowing flow distribution device |
| JP7397323B2 (en) | 2020-06-11 | 2023-12-13 | 日本製鉄株式会社 | Immersion nozzle for twin drum continuous casting equipment |
Citations (5)
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|---|---|---|---|---|
| US5857514A (en) * | 1995-09-14 | 1999-01-12 | Ishikawajima-Harima Heavy Industries Company Limited | Strip casting |
| JP2005021941A (en) * | 2003-07-02 | 2005-01-27 | Nippon Steel Corp | Continuous casting device for molten metal and continuous casting method |
| CN101708536A (en) * | 2009-11-03 | 2010-05-19 | 上海大学 | Bowl type turbulence-inhibiting flow-stabilizing flow distribution device for continuous casting of thin band |
| CN201711505U (en) * | 2010-05-31 | 2011-01-19 | 宝山钢铁股份有限公司 | Strip continuous casting screen type flow distributor |
| CN201735748U (en) * | 2010-05-31 | 2011-02-09 | 宝山钢铁股份有限公司 | Strip continuous casting orifice plate type liquid steel feeding device |
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2011
- 2011-05-30 CN CN201110142291.4A patent/CN102806324B/en active Active
Patent Citations (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US5857514A (en) * | 1995-09-14 | 1999-01-12 | Ishikawajima-Harima Heavy Industries Company Limited | Strip casting |
| JP2005021941A (en) * | 2003-07-02 | 2005-01-27 | Nippon Steel Corp | Continuous casting device for molten metal and continuous casting method |
| CN101708536A (en) * | 2009-11-03 | 2010-05-19 | 上海大学 | Bowl type turbulence-inhibiting flow-stabilizing flow distribution device for continuous casting of thin band |
| CN201711505U (en) * | 2010-05-31 | 2011-01-19 | 宝山钢铁股份有限公司 | Strip continuous casting screen type flow distributor |
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Non-Patent Citations (1)
| Title |
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| 张纬栋，等: "双辊薄带连铸布流系统研究", 《过程工程学报》 * |
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN108015243A (en) * | 2016-10-31 | 2018-05-11 | 宝山钢铁股份有限公司 | A kind of twin-roll thin strip continuous casting air blowing flow distribution device |
| CN108015243B (en) * | 2016-10-31 | 2019-12-31 | 宝山钢铁股份有限公司 | Blowing flow distribution device for twin-roll thin strip continuous casting |
| JP7397323B2 (en) | 2020-06-11 | 2023-12-13 | 日本製鉄株式会社 | Immersion nozzle for twin drum continuous casting equipment |
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| Publication number | Publication date |
|---|---|
| CN102806324B (en) | 2014-12-24 |
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