CN102328070A - Flow suppression ring for tundish stopper - Google Patents
Flow suppression ring for tundish stopper Download PDFInfo
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- CN102328070A CN102328070A CN201110322251A CN201110322251A CN102328070A CN 102328070 A CN102328070 A CN 102328070A CN 201110322251 A CN201110322251 A CN 201110322251A CN 201110322251 A CN201110322251 A CN 201110322251A CN 102328070 A CN102328070 A CN 102328070A
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Abstract
The invention relates to a continuous casting machine tundish flow control device applied to a stopper and belongs to the technical field of a ferrous metallurgy tundish continuous casting process. A flow suppression ring is characterized by being an annular structure and is in a circular shape at an overhead view or the left side part is elliptical and the right side part is circular; the flow suppression ring is fixed on the stopper; the size of an inner cavity of the flow suppression ring is matched with the stopper; and the size of the inner cavity is that: R is 5 to 100 millimeters, h is 5 to 30 millimeters, H is 5 to 150 millimeters and r is 5 to 50 millimeters. The flow suppression ring has the advantages of simple structure, convenience for manufacturing, quickness in change and low cost. On the aspect of optimizing the flow field of tundish, short-circuit flow can be prevented effectively and the liquid steel retention time can be prolonged; furthermore, the flow suppression ring is combined with the conventional flow control device (such as a stopping wall, a dam, a turbulent flow suppresser and the like) so as to achieve a good effect.
Description
Technical field
The present invention relates to a kind of conticaster tundish flow control device, be applied to stopper, belong to Ferrous Metallurgy tundish continuous casting process technical field.
Background technology
At present, in the steelmaking process, the continuous casting tundish plays important effect in modern times, has become the crucial metallurgical reaction that improves continuous casting billet quality.
The purpose of tundish is not only storage, distributes molten steel, is realized sequence casting etc., can reduce the thermal loss of molten steel simultaneously, and molten steel is steadily evenly transported to crystallizer, reduces the formation that macroscopic view is mingled with, and at utmost impels the removal of field trash.Simultaneously and since tundish just be installed in crystallizer directly over, any interference all will cause secondary oxidation and volume slag and the formation that causes macroscopic view to be mingled with.These macroscopic views are mingled with and can be brought into subsequently in the crystallizer and might cause casting blank defect.
Through various control fluid elements are set (wherein in tundish; Ba Yan, water conservancy diversion partition wall, filter and turbulent flow TVS; And their combination to use be the flow control device that modern tundish generally adopts) optimize the tundish flow field characteristic; Can reach effects such as promoting inclusion floating, even liquid steel temperature, thereby can guarantee normally carrying out of continuous casting production, in lot of documents, obtain certainly.But this has caused a lot of steel mills blindly in tundish, to set up the control fluid element, not only does not have the effect of optimizing steel quality sometimes, has also increased erosion and volume slag degree to refractory material on the contrary, and the result is just the contrary for it.In addition, cost is another factor that needs consideration.The use of flow control device, the dischargeable capacity of not only having dwindled tundish, also residual steel amount in various degree the existence bag.Implement the consumption of tundish hot turnover can the reduction significantly tundish refractory material.The baroque tundish of flow control device is housed is not suitable for carrying out heat turnover operation, and tundish needs to change fast to cooperate sequence casting.Walf thinks that upward lower retaining wall is to the effect of removing field trash and the tundish that is not suitable for various capacity; Heaslip proposes the inappropriate words in position that buffer board is installed, and can convection current thigh characteristic play minus effect; Germany Ma Pusi institute shows that with technique center research weir and dam in tundish promotes to be mingled with come-up and waits effect not obvious, advises no barricade Tundish Technology.The main cause that causes this phenomenon is that general document all is to the research of being done under some specific continuous casting parameter condition, and whether the conclusion that draws thus is applicable to that other continuous casting parameters are still waiting textual criticism.
Take all factors into consideration, available space is normally quite limited between ladle and the tundish, therefore, except the calcium of microalloying or the obstruction of the anti-mouth of a river is handled, the facility that carries out refining and alloying need be installed usually in the tundish.Flow control device setting in the tundish, should with simply be suitable for, resultant effect is best is principle; Prolong the time of staying of molten steel in tundish as much as possible, promote to greatest extent floating foreign and removal, acceleration molten steel mix, evenly molten steel composition and temperature, to the multithread continuous casting each stream burst molten steel flow characteristic is reached unanimity.
CN101947643A discloses weir, a kind of tundish dam flow control device.This flow control device, comprise put fore slag blocking wall, be arranged on the pushing off the slag counter-dam at slag weir rear portion and be arranged on the pushing off the slag at pushing off the slag counter-dam rear portion after the dam; The bottom on the left surface of being shaped as of slag weir all is that the cross section of outer arcuate is trapezoidal hexahedron; The bottom on the upper bottom surface of being shaped as of pushing off the slag counter-dam all is that the cross section of arc lower is pentagonal heptahedron; The dam is shaped as cuboid after the pushing off the slag.Its limitation is that structure is too complicated, and only to the tundish with given shape, applicability is not strong.
CN201579410U discloses a kind of continuous casting tundish with whole multi-functional flow control device, comprises sidewall, bottom surface flow straightener and inner chamber, it is characterized in that; Said sidewall comprises front, rear, left and right, left front and right front six sidewalls; Said six sidewalls and bottom surface flow straightener connect and compose six prism structures, and the inside of six prism structures forms inner chamber, and said inner chamber is the truncated rectangular pyramids structure of band fillet; This truncated rectangular pyramids is suitable for reading big, young down, on said left front sidewall and the right front sidewall pod apertures is set.Its weak point is complex structure, has increased processing and manufacturing difficulty, is only applicable to multithread T type tundish.
CN1730202A discloses a kind of tundish stopper that can the capture clip foreign material, belongs to the Ferrous Metallurgy field.Be based upon on the fractal theory basis; Its characteristics are to be provided with circumferential flange on the stopper circumference; The side-glance shape of circumference bead can be ellipse, circle, triangle and direction figures, and the plan view shape of circumference bead can be ellipse, circle, triangle, direction, polygon.Because it is comparatively violent that tundish outlet molten steel washes away the stopper bead, bead deforms when serious, so, does not only play and catches the effect of assembling field trash, can increase macroscopic view on the contrary and be mingled with.If take to change the way of stopper, then its service life obviously lower, cause the waste of refractory material.
Summary of the invention
Defective to continuous casting tundish process characteristic and prior art; The result of study that the present invention combines according to the physical analogy and the mathematical simulation in continuous casting tundish flow field, the processing of comprehensive flow control device, make, build by laying, fix, a kind of viscous flow ring that is used for stopper that multiple factor such as life-span designs.Purpose of design is to guarantee under the principle that molten steel passes through, and the ring that remains in a standstill is installed in the stopper bottom, can prevent short-circuit flow, changes the Molten Steel Flow path, is beneficial to inclusion floating, pure molten steel.
A kind of viscous flow ring that is used for the tundish stopper that can avoid short-circuit flow to optimize the flow field is characterized by circulus, and plan view shape is that circle or left part are ellipse, and right portions is circular, is fixed on the stopper inner cavity size and stopper coupling; Size R is that 5 ~ 100mm, h are that 5 ~ 30mm, H are that 5 ~ 150mm, r are 5 ~ 50mm.
Mobile can the regarding as by three districts of molten steel, formed in the tundish, promptly full confounding, piston region and dead band.The fluid of full confounding reaches equably and mixes; The fluid of piston region flows as passing through a pipe, no back-mixing stream; And the fluid in the stagnation region does not almost have mobile and diffusion.In order to detect, estimate and observe the behavior of fluid in tundish, when the water simulated experiment, adopt to the quick beam of big bag and inject tracer, measure stimulation-the response method of tundish outlet tracer concentration simultaneously.So just can obtain exporting tracer concentration time relation curve.See shown in Figure 4.Here it is usually alleged time of staying distribution curve, i.e. RTD curve.
Operation principle of the present invention is the molten steel that injects from ladle, and direction differs, and the part molten steel fails to be convened for lack of a quorum and directly flows to outlet, and installation remains in a standstill behind the ring; Can effectively stop this part molten steel, and change its flow direction, therefore; Can prolong the molten steel time of staying, optimize the flow field, see Fig. 3.
The invention has the advantages that, simple in structure, easy to make, to change fast, cost is lower.Aspect optimization tundish flow field, can effectively stop short-circuit flow, prolong the molten steel time of staying.The basis that the present invention can use is that the widely-used stopper control of tundish is at present flowed.In addition, the present invention combines traditional flow control device (barricade, Ba Yan, turbulent flow TVS etc.), can play good effect.
Description of drawings
Fig. 1, the 2nd, the viscous flow ring structure sketch map that the inventive method is related;
Fig. 3 is tundish flow field, a stopper combination viscous flow ring back sketch map;
Fig. 4 is the result who under laboratory condition, utilizes the present invention to measure through water simulation stimulation-response experiment;
Fig. 5, the 6th, the single current tundish sketch map of application example;
Fig. 7, the 8th, 3 stream T type tundish sketch mapes of application example;
The asymmetric tundish sketch map of stream more than Fig. 9, the 10th, application example;
Figure 11, the 12nd, improved viscous flow ring structure sketch map.
Referring to Fig. 1,2, among the figure: 1 is stopper; 2 are the ring that remains in a standstill; R is the ring ring footpath that remains in a standstill; H is the viscous flow ring thickness; H is the distance between ring bottom surface and stopper bottom that remains in a standstill.Wherein, Fig. 1 is a front view, and Fig. 2 is a vertical view.
Referring to Fig. 3, among the figure: 1 is stopper; 2 are the ring that remains in a standstill; 3 is tundish; 4 is long nozzle.
Referring to Fig. 4, for utilizing time of staying distribution (RTD) curve at two different mouths of a river that the present invention done through water simulation stimulations-response experimental result, wherein 6 is short-circuit flow.
Referring to Fig. 5,6, among the figure: 1 is stopper; 2 are the ring that remains in a standstill; 3 is tundish; 4 is long nozzle.Wherein, Fig. 6 is an a-quadrant enlarged drawing among Fig. 5.
Referring to Fig. 7,8, among the figure: 1 is stopper; 2 are the ring that remains in a standstill; 3 is tundish; 4 is long nozzle (beam district); 5 is the porous barricade.Wherein, Fig. 7 is a vertical view, and Fig. 8 is left view (porous barricade and pod apertures thereof are not drawn).
Referring to Fig. 9,10, among the figure: 1 is stopper; 2 are the ring that remains in a standstill; 3 is tundish; 4 is long nozzle (beam district); 5 is the porous barricade.Wherein, Fig. 9 is a vertical view, and Figure 10 is left view (porous barricade and pod apertures thereof are not drawn).
Referring to Figure 11,12, among the figure: 1 is stopper; 2 are the ring that remains in a standstill; H is the viscous flow ring thickness; H is the distance between ring bottom surface and stopper bottom that remains in a standstill; R is oval part viscous flow ring ring footpath; R is that circular portion remains in a standstill the ring ring directly.Wherein, Figure 11 is a front view, and Figure 12 is a vertical view.
The specific embodiment
Embodiment 1: a kind of viscous flow ring that is used for single current tundish stopper, size R are that 50mm, h are that 20mm, H are 30mm, see Fig. 5,6.The ring that remains in a standstill can effectively be controlled short-circuit flow, changes the Molten Steel Flow path, prolongs the time of staying.If consider the influence in beam district, can use the combination of turbulent flow TVS+viscous flow ring.
Embodiment 2: a kind of viscous flow ring that is used for 3 stream T type tundish stoppers, and wherein, the size R of intermediate flow stopper viscous flow ring is that 80mm, h are that 20mm, H are 30mm, the size R of two effluent stoppers viscous flow ring is that 50mm, h are that 20mm, H are 30mm, sees Fig. 7,8.Beam district stream thigh is not having under the situation of barricade, and is first-class in the middle of arriving at first, causes short-circuit flow, and therefore, on designing and producing, the diameter of intermediate flow viscous flow ring is than the big 30mm in both sides.If consider the influence of beam district, can use the combination of turbulent flow TVS+viscous flow ring; Consider three stream uniformity, can use the combination of turbulent flow TVS+porous barricade+viscous flow ring.
Embodiment 3: a kind of viscous flow ring that is used for the asymmetric tundish stopper of multithread, and wherein the viscous flow ring size R near the beam district is that 100mm, h are that 20mm, H are 50mm, both sides size only R reduces with 20mm one by one, is that 80mm, h are that 20mm, H are 50mm like R; R is that 60mm, h are that 20mm, H are 50mm etc., sees Fig. 9,10.If consider the influence of beam district, can use the combination of turbulent flow TVS+viscous flow ring; Consider three stream uniformity, can use the combination of turbulent flow TVS+porous barricade+viscous flow ring.
Embodiment 4: be used for the viscous flow ring of tundish stopper after a kind of the improvement, size R is that 75mm, h are that 20mm, H are that 50mm, r are 30mm, sees Figure 11,12.During making, this ring left part that remains in a standstill is oval, and right portions is circular, is different from the circle viscous flow ring of initial proposition.Consider that mainly the moving direction of beam stream plume is to get into from long nozzle; Flow to each submersed nozzle then; Therefore the side in the face of the stream thigh receives the impact of big velocity flow thigh bigger, increases this part contact area, can effectively stop short-circuit flow on the one hand; Prolonging on the other hand remains in a standstill encircles service life, reduces the replacement cycle.
Claims (2)
1. a viscous flow ring that is used for the tundish stopper is characterized by circulus, and plan view shape is that circle or left part are ellipse, and right portions is circular, is fixed on the stopper inner cavity size and stopper coupling; Size R is that 5 ~ 100mm, h are that 5 ~ 30mm, H are 5 ~ 150mm.
2. a kind of according to claim 1 viscous flow ring that is used for the tundish stopper, the ring plan view shape left part that it is characterized in that remaining in a standstill is for oval, and size r is 5 ~ 50mm.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201110322251A CN102328070A (en) | 2011-10-21 | 2011-10-21 | Flow suppression ring for tundish stopper |
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201110322251A CN102328070A (en) | 2011-10-21 | 2011-10-21 | Flow suppression ring for tundish stopper |
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| CN102328070A true CN102328070A (en) | 2012-01-25 |
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| CN201110322251A Pending CN102328070A (en) | 2011-10-21 | 2011-10-21 | Flow suppression ring for tundish stopper |
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Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN108380862A (en) * | 2018-04-03 | 2018-08-10 | 青岛正望钢水控制股份有限公司 | A kind of anti-slag stopper of continuous casting |
| CN111950107A (en) * | 2019-04-30 | 2020-11-17 | 上海梅山钢铁股份有限公司 | Analysis method for flow characteristics of flow field in multi-flow continuous casting tundish |
| CN111950107B (en) * | 2019-04-30 | 2024-06-04 | 上海梅山钢铁股份有限公司 | Method for analyzing flow characteristics of flow field in multi-stream continuous casting tundish |
Citations (4)
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| CN1067597A (en) * | 1991-06-07 | 1993-01-06 | 北京科技大学 | Prevent that ladle and middle pot drainage opening from going out the device of volume slag in the stream |
| CN1730202A (en) * | 2005-09-01 | 2006-02-08 | 北京科技大学 | Continuous casting bakie sagger column capable of catching impurities |
| JP2006205217A (en) * | 2005-01-28 | 2006-08-10 | Akechi Ceramics Co Ltd | Stopper for automatic pouring furnace |
| JP2009090322A (en) * | 2007-10-09 | 2009-04-30 | Furukawa Sky Kk | Continuous casting machine and continuous casting method |
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2011
- 2011-10-21 CN CN201110322251A patent/CN102328070A/en active Pending
Patent Citations (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN1067597A (en) * | 1991-06-07 | 1993-01-06 | 北京科技大学 | Prevent that ladle and middle pot drainage opening from going out the device of volume slag in the stream |
| JP2006205217A (en) * | 2005-01-28 | 2006-08-10 | Akechi Ceramics Co Ltd | Stopper for automatic pouring furnace |
| CN1730202A (en) * | 2005-09-01 | 2006-02-08 | 北京科技大学 | Continuous casting bakie sagger column capable of catching impurities |
| JP2009090322A (en) * | 2007-10-09 | 2009-04-30 | Furukawa Sky Kk | Continuous casting machine and continuous casting method |
Non-Patent Citations (1)
| Title |
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| 刘金刚等: "中间包控制汇流旋涡的水模研究", 《钢铁研究学报》 * |
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN108380862A (en) * | 2018-04-03 | 2018-08-10 | 青岛正望钢水控制股份有限公司 | A kind of anti-slag stopper of continuous casting |
| CN111950107A (en) * | 2019-04-30 | 2020-11-17 | 上海梅山钢铁股份有限公司 | Analysis method for flow characteristics of flow field in multi-flow continuous casting tundish |
| CN111950107B (en) * | 2019-04-30 | 2024-06-04 | 上海梅山钢铁股份有限公司 | Method for analyzing flow characteristics of flow field in multi-stream continuous casting tundish |
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Application publication date: 20120125 |