CN101704071B - Direct impact flow stabilizing and distributing device for continuously casting thin strip - Google Patents
Direct impact flow stabilizing and distributing device for continuously casting thin strip Download PDFInfo
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- CN101704071B CN101704071B CN2009101982425A CN200910198242A CN101704071B CN 101704071 B CN101704071 B CN 101704071B CN 2009101982425 A CN2009101982425 A CN 2009101982425A CN 200910198242 A CN200910198242 A CN 200910198242A CN 101704071 B CN101704071 B CN 101704071B
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Abstract
The invention relates to a direct impact flow stabilizing and distributing device for continuously casting a thin strip, comprising a flow distributing device arranged above a rotation roller and a casting nozzle extending into the cavity of the flow distributing device. The upper part of the flow distributing device is provided with an open rectangular cavity, and the lower part of the flow distributing device shrinks to become narrow to form a fork-shaped cavity; a plurality of symmetrical direct impact flow stabilizing holes which are arranged oppositely are arranged on two inner side walls of the fork-shaped cavity; and the direct impact flow stabilizing and distributing device also can be provided with a turbulent motion restraining plate and a turbulent motion restraining device. By adopting the direct compact flow stabilizing hole, the invention reduces the flow-injection impact to realize flow stabilization, ensures that the injected molten steel has uniform temperature and improves the quality of steel strips.
Description
Technical field
The present invention relates to a kind of thin strap continuous casting with the formula flow-stabilizing flow distribution device that liquidates, belong to thin strap continuous casting technology field.
Background technology
The thin strap continuous casting flow distribution device is in important status in whole strip production, the quality of its cloth fluidity energy has a strong impact on strip base final mass, therefore, various countries have launched a lot of researchs in this regard, as United States Patent (USP) US6 are arranged, and 073,680, US5,587,514, US6,125, disclosed distributor such as 917 and US6,012,508, it is positioned at the below of tundish, shape such as little tundish.The molten steel that is flowed into by tundish flow in the current distribution device by the discharge orifice of arranging in this distributor.The hanging device that the described current distribution device form of Chinese patent ZL01276402.7 and ZL02283420.6 is an integral body, the cloth discharge orifice by both sides and two ends reaches the purpose of cloth stream.
The problem that traditional in the past distributor or current distribution device exist mainly is not have suppression or reduce its turbulent flow and the interior arrangement of stream strand impact force action in molten steel flows course of conveying, because cause the molten steel flowing instability, and then cause in the molten bath liquid fluctuating aggravation, molten bath internal temperature inequality influences normal running and strip quality.
Summary of the invention
The object of the present invention is to provide a kind of molten steel that improves to flow thin strap continuous casting that stationarity, no turbulent flow do not have stream burst impulsive force influence, molten steel is flowed evenly with the formula flow-stabilizing flow distribution device that liquidates, uniformity of temperature profile, thus raising approaches the casting quality of steel band; Can use simultaneously the comparatively simple mouth of a river or traditional continous casting sprue, simplify the structure of cloth streaming system, reduce production costs.
For achieving the above object, design of the present invention is: thin strap continuous casting of the present invention is with the formula flow-stabilizing flow distribution device that liquidates, mainly by current distribution device, sprue gate, the formula of the liquidating setting of portalling, the current distribution device cross section is an ancient cooking vessel type structure, whole current distribution device can be seen as the two sections form, its top is a uncovered rectangular cavities, shrinks at the certain altitude place to narrow down and separate separated into two parts (bottom) cavity in the centre, the form of its fork can have various ways, for example wedge angle type and circular arc; For pointed shape, the partial shape of current distribution device internal protrusion is similar to unequal-sided pyramid, and its inclined plane at the roller cross direction carries out the transition to the platform shape near the current distribution device two ends time; The cavity bottom inboard has some circular holes or the long and narrow hole symmetry is arranged in opposite directions, portal the angle of up and down or left and right can be set as requested, the height that portals is according to the technological requirement adjustment, and can be arranged to " one " font, " V " font or " V " type of falling.When molten steel flowed out from current distribution device, portalling of arranging in opposite directions can make two strands of molten steel impact mutually, consumed the energy that molten steel flows and the effect that obtains to flow slowly; This device longitudinal length is according to concrete technology adjustment; In order to obtain the even cloth stream of roller cross direction, can also press down rapid plate inner the adding at current distribution device, in the middle of open several rounds, and the bowl type turbulence-inhibiting device can be set on orifice plate.Sprue gate can be the straight barrel type mouth of a river, also can be the Y-shaped mouth of a river, perhaps uses common continuous casting mouth, and this mouth of a river is immersed in the molten steel.Molten steel enters current distribution device by the mouth of a river, and the projection by pyramid flow to current distribution device everywhere along four face cloth, has reduced the beam impact; Press down rapid plate then molten steel presses down now and carries out a cloth stream on the rapid plate and enter the current distribution device bottom then if having; If the bowl type turbulence-inhibiting device is arranged, bowl had absorbed the part impact energy in then molten steel was introduced into, molten steel along interior bowl edge rise and overflow in bowl enter the space of outer bowl and orifice plate composition, in this cavity, molten steel can enter the current distribution device bottom from the perforate of orifice plate, also can go into bowl formula device outside or overflow, enter the orifice plate space, subsequently the aperture inflow current distribution device bottom of offering by orifice plate from the perforate water conservancy diversion around the outer bowl from the top drilling of outer bowl; Thereafter molten steel enters the narrow section of current distribution device, and the portion narrow section immerses in the molten bath, and the circular hole or the long and narrow hole of molten steel by narrow section two parts cavity flows out current distribution device and form in the molten bath and liquidate, and reduces the flow velocity of molten steel, to reach stablizing of cloth stream.Because the current distribution device bottom is long and narrow, helps pouring into a mould in the narrow molten bath of thin strap continuous casting, can guarantee to go up along its length the even distribution of molten steel again.Originally the sprue gate that the formula that liquidates flow-stabilizing flow distribution device adopts mainly contain two kinds of forms with, the concrete structure parameter is decided on technological requirement.
According to the foregoing invention design, the present invention adopts following technical proposals:
A kind of thin strap continuous casting is with the formula flow-stabilizing flow distribution device that liquidates, comprise current distribution device that is arranged at the transfer roller top and the sprue gate that stretches in the current distribution device chamber, it is characterized in that described current distribution device top is uncovered rectangular cavities, narrow and the shape cavity that becomes to diverge of stenosis, the some current stabilization holes that liquidate that have symmetry to arrange in opposite directions on two madial walls of this fork shape cavity are shunk in the bottom.
Two madial walls of above-mentioned trouble shape cavity are parallel to each other or become down " V " type, and the top is connected to each other with circular arc wall or turriform wall on two madial walls.
Between lower end two lateral walls of above-mentioned trouble shape cavity and two madial walls respectively with wedge angle or arc transition.
The above-mentioned current stabilization hole exits that liquidates becomes horizontal direction or deflection upwards or downwards or left or to the right.
The above-mentioned current stabilization hole that liquidates is circular hole or long and narrow hole, is " one " font or " V " or " V " type of falling arrangement at roll axial direction.
The rapid plate that presses down of a horizontal setting is arranged at above-mentioned uncovered rectangular cavities bottom, describedly presses down uniform 1-4 row aperture on the rapid plate.
The above-mentioned rapid plate central authorities that press down are provided with a bowl type turbulence-inhibiting device, and described bowl type turbulence-inhibiting device is made of bowl in and one outer bowl; Bowl places the described center that presses down rapid plate in described, and opening upwards; Described outer bowl is bigger and cover interior bowl than interior bowl, and bowl end that it makes progress has the aperture bigger than sprue gate diameter, sprue gate to stretch into this aperture, and sprue gate lower surface and interior bowl the upward opening distance of remaining valid; A plurality of perforates towards roll axial direction are arranged on the bottom bowl wall of described outer bowl; Described outer bowl upper end is circular or oval or square, and the lower end is circular or oval or rectangle, seamlessly transits between the top and bottom.
Above-mentioned sprue gate is the straight barrel type mouth of a river or the fork shape mouth of a river.
The above-mentioned rapid plate and bowl type turbulence-inhibiting device and current distribution device of pressing down made one, and current distribution device and sprue gate are made by refractory material.
The present invention has following conspicuous outstanding substantive distinguishing features and remarkable advantage compared with prior art:
(1) combination of portalling by current distribution device, sprue gate and the formula of liquidating has been simplified the cloth flow structure of thin strap continuous casting greatly, and can have been used the normal pouring mouth of a river, has reduced production cost.
(2) adopt submersed nozzle can reduce beam and impact, and guarantee that molten steel fully mixes on top, make the cast molten steel temperature even.
(3) design of inequilateral pyramid projection and press down the design of rapid plate in the current distribution device makes the molten steel that enters from the mouth of a river can be evenly distributed to current distribution device everywhere, and molten steel is had buffering effect.
(4) by the bowl type turbulence-inhibiting part flow arrangement, interior bowl is used to slow down beam to be impacted, and outer bowl shunting molten steel has reduced the impact of molten steel to two rollers and side seal board, has suppressed splash.
(5) contraction of current distribution device design can make things convenient for current distribution device to insert inside, molten bath; The design that the formula of liquidating is portalled can be alleviated the flowing velocity of molten steel, and avoid molten steel directly to impact two rollers, improve the distribution situation of molten steel in the molten bath, avoid and reduce the fluctuation of molten steel liquid level in the molten bath, and can make the molten steel temperature homogenising in the molten bath, thereby guarantee to roll normally carrying out of casting operation, help improving the quality of band steel.
Description of drawings
Fig. 1 is the liquidate structural representation of formula flow-stabilizing flow distribution device of the present invention.
Fig. 2 is the vertical view of formula flow-stabilizing flow distribution device of liquidating.
Fig. 3 is the formula flow-stabilizing flow distribution device current distribution device partial structurtes schematic diagram that liquidates.
Fig. 4 schematic diagram in formula current stabilization hole of liquidating in the formula flow-stabilizing flow distribution device that liquidates.
Fig. 5 is the side-looking section of the formula flow-stabilizing flow distribution device current distribution device current stabilization hole Boulez figure ((a) figure is the V-type Boulez among the figure, and (b) figure is " one " type Boulez, and (c) figure is down " V " type Boulez) that liquidates that liquidates
Fig. 6 is provided with the formula that the liquidates flow-stabilizing flow distribution device schematic diagram that presses down rapid plate.
Fig. 7 is the formula that the liquidates flow-stabilizing flow distribution device schematic diagram that is provided with the bowl type turbulence-inhibiting device
Fig. 8 is the sprue gate schematic diagram.
The specific embodiment
After now the preferred embodiments of the present invention being specified in conjunction with the accompanying drawings.
Embodiment one: referring to Fig. 1, Fig. 2, Fig. 3 and Fig. 4, this thin strap continuous casting mainly is made of the current distribution device 1 that is arranged on transfer roller 8 tops, sprue gate 2 with the formula flow-stabilizing flow distribution device that liquidates.Current distribution device 1 cross section is an ancient cooking vessel type structure, and whole current distribution device can be seen as the two sections form, and its top is a uncovered rectangular cavities, shrinks at the certain altitude place to narrow down and separate in the centre, is divided into two (bottom) trouble shape cavity 4.Cavity bottom two inboards have some holes symmetry and arrange 3 in opposite directions, and when molten steel flowed out from current distribution device 1, the current stabilization hole 3 that liquidates of Pai Lieing can make two strands of molten steel impact mutually in opposite directions, consume the energy that molten steel flows and the effect that obtains to flow slowly.
Portalling in described current distribution device 1, the mouth of a river 2, the formula of liquidating 3 all is to be made by refractory material.
Thin strap continuous casting of the present invention is to reduce production costs, can effectively prevent the molten steel splash and weaken the beam impact with the maximum characteristics of the formula flow-stabilizing flow distribution device that liquidates, and guarantees the even distribution of molten steel in the molten bath.
Embodiment two: present embodiment is identical with embodiment one, and special feature is: referring to Fig. 3, Fig. 4 and Fig. 5, two madial walls of described trouble shape cavity 4 are parallel to each other or become down " V " type, and the top is connected to each other with circular arc wall 5b or turriform wall 5a on two madial walls.Between lower end two lateral walls of described trouble shape cavity 4 and two madial walls respectively with wedge angle or arc transition.The described current stabilization hole 3 that liquidates exports into horizontal direction 3a or deflection 3b upwards or downwards or left or to the right.The described current stabilization hole 3 that liquidates is circular hole or long and narrow hole, is " one " font or " V " or " V " type of falling arrangement at roll axial direction.
Embodiment three: present embodiment is identical with embodiment two, and special feature is: referring to Fig. 6, the rapid plate 6 that presses down of a horizontal setting is arranged at above-mentioned uncovered rectangular cavities bottom (promptly branch off shape cavity 4 on put), should press down uniform 1-4 row aperture on the rapid plate 6.
Embodiment four: present embodiment is identical with embodiment three, and special feature is: referring to Fig. 7, described rapid plate 6 central authorities that press down are provided with a bowl type turbulence-inhibiting device 7, and described bowl type turbulence-inhibiting device 7 is made of bowl in and one outer bowl; Bowl places the described center that presses down rapid plate 6 in described, and opening upwards; Described outer bowl is bigger and cover interior bowl than interior bowl, and bowl end that it makes progress has than the big aperture of sprue gate 2 diameters, and sprue gate 2 stretches into this aperture, and sprue gate 2 lower surfaces and interior bowl the upward opening distance of remaining valid; A plurality of perforates towards roll axial direction are arranged on the bottom bowl wall of described outer bowl; Described outer bowl upper end is circular or oval or square, and the lower end is circular or oval or rectangle, seamlessly transits between the top and bottom.Referring to Fig. 8, described sprue gate 2 is straight barrel type mouth of a river 2a or Y-shaped mouth of a river 2b.Describedly press down rapid plate 6 and bowl type turbulence-inhibiting device 7 is made one with current distribution device 1, current distribution device 1 and sprue gate 2 are made by refractory material.
Claims (9)
1. a thin strap continuous casting is with the formula flow-stabilizing flow distribution device that liquidates, comprise the current distribution device (1) that is arranged at transfer roller (8) top and stretch into sprue gate (2) in current distribution device (1) chamber, it is characterized in that described current distribution device (1) top is uncovered rectangular cavities, narrow and the shape cavity (4) that becomes to diverge of stenosis, the some current stabilization holes (3) that liquidate that have symmetry to arrange in opposite directions on two madial walls of this fork shape cavity (4) are shunk in the bottom.
2. thin strap continuous casting according to claim 1 is with the formula flow-stabilizing flow distribution device that liquidates, two madial walls that it is characterized in that described fork shape cavity (4) are parallel to each other or become down " V " type, and the top is connected to each other with circular arc wall (5b) or turriform wall (5a) on two madial walls.
3. thin strap continuous casting according to claim 1 is with the formula flow-stabilizing flow distribution device that liquidates, and it is characterized in that between lower end two lateral walls of described fork shape cavity (4) and two madial walls respectively with wedge angle or arc transition.
4. thin strap continuous casting according to claim 1 is with the formula flow-stabilizing flow distribution device that liquidates, and it is characterized in that the described current stabilization hole (3) that liquidates exports into horizontal direction (3a) or deflection (3b) upwards or downwards or left or to the right.
5. thin strap continuous casting according to claim 1 is characterized in that with the formula flow-stabilizing flow distribution device that liquidates the described current stabilization hole (3) that liquidates is circular hole or long and narrow hole, is " one " font or " V " or " V " type of falling arrangement at roll axial direction.
6. thin strap continuous casting according to claim 1 is with the formula flow-stabilizing flow distribution device that liquidates, and what it is characterized in that a horizontal setting arranged at described uncovered rectangular cavities bottom presses down rapid plate (6), and the described rapid plate (6) that presses down is gone up uniform 1-4 row aperture.
7. thin strap continuous casting according to claim 6 is characterized in that described rapid plate (6) central authorities that press down are provided with a bowl type turbulence-inhibiting device (7) with the formula flow-stabilizing flow distribution device that liquidates, and described bowl type turbulence-inhibiting device (7) is made of bowl in and one outer bowl; Bowl places the described center that presses down rapid plate (6) in described, and opening upwards; Described outer bowl is bigger and cover interior bowl than interior bowl, and bowl end that it makes progress has than the big aperture of sprue gate (2) diameter, and sprue gate (2) stretches into this aperture, and sprue gate (2) lower surface and interior bowl the upward opening distance of remaining valid; A plurality of perforates towards roll axial direction are arranged on the bottom bowl wall of described outer bowl; Described outer bowl upper end is circular or oval or square, and the lower end is circular or oval or rectangle, seamlessly transits between the top and bottom.
8. thin strap continuous casting according to claim 1 is characterized in that with the formula flow-stabilizing flow distribution device that liquidates described sprue gate (2) is the straight barrel type mouth of a river (2a) or the fork shape mouth of a river (2b).
9. thin strap continuous casting according to claim 7 is with the formula flow-stabilizing flow distribution device that liquidates, and it is characterized in that the described rapid plate (6) and bowl type turbulence-inhibiting device (7) and current distribution device (1) of pressing down make one, and current distribution device (1) and sprue gate (2) are made by refractory material.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN2009101982425A CN101704071B (en) | 2009-11-03 | 2009-11-03 | Direct impact flow stabilizing and distributing device for continuously casting thin strip |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN2009101982425A CN101704071B (en) | 2009-11-03 | 2009-11-03 | Direct impact flow stabilizing and distributing device for continuously casting thin strip |
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| Publication Number | Publication Date |
|---|---|
| CN101704071A CN101704071A (en) | 2010-05-12 |
| CN101704071B true CN101704071B (en) | 2011-10-26 |
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| Application Number | Title | Priority Date | Filing Date |
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| CN2009101982425A Expired - Fee Related CN101704071B (en) | 2009-11-03 | 2009-11-03 | Direct impact flow stabilizing and distributing device for continuously casting thin strip |
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| CN103357828B (en) * | 2013-07-29 | 2015-03-04 | 东北大学 | Casting system used for twin-roll thin strip continuous casting and use method thereof |
Citations (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US4801056A (en) * | 1987-06-08 | 1989-01-31 | Bethlehem Steel Corp. | Distributor for continuous casting machine |
| FR2664514A1 (en) * | 1990-07-13 | 1992-01-17 | Ishikawajima Harima Heavy Ind | METHOD AND DEVICE FOR CASTING STRIPS AND METAL DELIVERY NOZZLE USED WITH THIS PROCESS AND DEVICE. |
| CN2582784Y (en) * | 2002-12-19 | 2003-10-29 | 宝山钢铁股份有限公司 | Profiled flow distribution apparatus used for thin belt continuous casting |
| CN201186344Y (en) * | 2008-04-25 | 2009-01-28 | 宝山钢铁股份有限公司 | Flow-distributing device with compressed wall surface for continuous casting thin belt |
| CN201217061Y (en) * | 2008-06-23 | 2009-04-08 | 宝山钢铁股份有限公司 | Bottom spread type stream distribution apparatus for continuously casting of thin belt |
-
2009
- 2009-11-03 CN CN2009101982425A patent/CN101704071B/en not_active Expired - Fee Related
Patent Citations (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US4801056A (en) * | 1987-06-08 | 1989-01-31 | Bethlehem Steel Corp. | Distributor for continuous casting machine |
| FR2664514A1 (en) * | 1990-07-13 | 1992-01-17 | Ishikawajima Harima Heavy Ind | METHOD AND DEVICE FOR CASTING STRIPS AND METAL DELIVERY NOZZLE USED WITH THIS PROCESS AND DEVICE. |
| CN2582784Y (en) * | 2002-12-19 | 2003-10-29 | 宝山钢铁股份有限公司 | Profiled flow distribution apparatus used for thin belt continuous casting |
| CN201186344Y (en) * | 2008-04-25 | 2009-01-28 | 宝山钢铁股份有限公司 | Flow-distributing device with compressed wall surface for continuous casting thin belt |
| CN201217061Y (en) * | 2008-06-23 | 2009-04-08 | 宝山钢铁股份有限公司 | Bottom spread type stream distribution apparatus for continuously casting of thin belt |
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| CN101704071A (en) | 2010-05-12 |
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