CN2799124Y - Flow control device for medium thin slab continuous casting tundish - Google Patents
Flow control device for medium thin slab continuous casting tundish Download PDFInfo
- Publication number
- CN2799124Y CN2799124Y CN 200520091271 CN200520091271U CN2799124Y CN 2799124 Y CN2799124 Y CN 2799124Y CN 200520091271 CN200520091271 CN 200520091271 CN 200520091271 U CN200520091271 U CN 200520091271U CN 2799124 Y CN2799124 Y CN 2799124Y
- Authority
- CN
- China
- Prior art keywords
- tundish
- control device
- flow control
- molten steel
- continuous casting
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Expired - Fee Related
Links
Images
Landscapes
- Continuous Casting (AREA)
Abstract
The utility model provides a tundish flow control device, which is arranged on the lower part of a long nozzle of a tundish inner molten steel tank. The midpoint of the tundish flow control device is aligned to the flow filling central line of the long nozzle. The utility model has the advantages of the whole body of the tundish flow control device is cylindrical; an inner cavity of the tundish flow control device adopts an upwards reducing structure, and the bottom of the tundish flow control device is in the shapes of ripples with concentric circles. In the direction of a tundish outlet, one side at the bottom of the inner cavity of the tundish flow control device is provided with three through holes which are upwards inclined to make a tundish inner liquid level stable. The flowing of a flow field concentrates on the upper part of the tundish flow control device, so inclusions float upwards sufficiently and is easily adsorbed by protective slag on the tundish inner liquid level. The utility model has the advantages of pure molten steel, high continuous casting billet quality, long nozzle flushing on a tundish wall surface elimination and long service life. By making use of the tundish flow control device, molten steel is formed into laminar flow, the discharge speed of the molten steel sped up, the time of section mixing is shortened, the number of mixing steel is reduced and the yield of the steel is improved. The structure that through holes are upwards inclined at the bottom of the inner cavity can reduce dead areas and the quantity of tundish residue steel.
Description
Technical field
The invention belongs to the medium thin slab continuous casting and rolling technical field, specifically is medium thin slab continuous casting tundish flow control device.
Technical background
Continuous casting and rolling production line is because of its pulling rate height (average pull rate 2.5～2.6m/min, maximum pulling rate 3.3m/min), strand is thin, the submersed nozzle internal diameter is little, the tundish capacity is little, so there are problems such as the fluctuation of the easy dross of molten steel, mould liquid level is big, it is more serious to make production cooling rolled steel plate surface be mingled with problem, very big to cold rolling production influence.At present, adopt of continuous casting tundish added barricade more, control stream modes such as weir are carried out continuous casting production, because molten steel jar long nozzle beam acutely washing away to the tundish inboard, increased the quantity of nonmetal inclusion in the molten steel, slab quality there is adverse effect, and reduced the service life of tundish liner, development of new tundish flow control device on the basis on original barricade and dam for this reason, purpose is the adverse effect that middle Baogang water is flowed at the high speed beam that big bag long nozzle shock zone limits ladle long nozzle, improve tundish molten steel flow characteristic, reduce the turbulent extent of tundish molten steel, promote inclusion floating, alleviate that ladle is opened when watering or changing because the ladle beam impacts the molten steel that causes splashes, reduce tundish liner invar stream and wash away the erosion that causes, to improve slab quality.
Adopted the test report of flow control device when domestic publication and patent gazette all once disclosed relevant continuous casting, but the flow control device cavity shape mostly is rectangle, cylindrical.Because the form difference of each tame continuous casting tundish, the position that these flow control devices are installed is also different with shape, therefore to improving tundish molten steel flow characteristic, reducing tundish liner invar liquid, to wash away the effect that the erosion that causes plays also inequality, four angles of rectangle flow control device easily form the viscous flow dead band, influence the effect of turbulent flow.
Summary of the invention
The purpose of this utility model is to provide a kind of medium thin slab continuous casting tundish flow control device, make molten steel time of staying in tundish obtain prolonging, thereby improve tundish molten steel flow characteristic, promote inclusion floating, improve slab quality, help molten steel to form laminar flow simultaneously, make molten steel combined amount minimizing between adjacent two jars.
The purpose of this utility model is to realize like this, the tundish flow control device is installed on molten steel jar long nozzle below in the tundish, the midpoint alignment long nozzle beam center line of tundish flow control device, be characterized in, integral body is columniform, inner chamber adopts upwards tapered configuration, and the bottom is the concentric circles bellows-shaped.
Concrete structure of the present utility model has, and at the tundish Way out, a side is provided with 3 through holes that are tilted at the bottom of the tundish flow control device chamber, and the through hole angle of inclination is 40 °～50 °.
Advantage of the present utility model is, makes the interior liquid level of tundish keep stable, flows and concentrates on the flow control device top in the flow field; helping field trash fully floats and is easily adsorbed by the liquid level covering slag; pure molten steel improves continuous casting billet quality, and tundish walls is subjected to long nozzle to wash away elimination; prolong service life; adopt this tundish flow control device to make molten steel form laminar flow, and accelerate the mass rate of emission of molten steel, shorten the time of mixer; reduce the quantity of mixed steel, improved the recovery rate of steel.
Description of drawings
Accompanying drawing 1 is installation site figure of the present utility model;
Accompanying drawing 2 is a front view of the present utility model;
Accompanying drawing 3 is the vertical view of accompanying drawing 2.
Wherein: 1 tundish, 2 long nozzle beam center lines, 3 tundish flow control devices, 31 upper edges, 32 concentric circles ripples, 33 through holes
The specific embodiment
Below in conjunction with accompanying drawing specific embodiment of the utility model is elaborated.
As Fig. 1; shown in 2; the utility model is installed in molten steel jar long nozzle below in the tundish 1; the midpoint alignment long nozzle beam center line 2 of tundish flow control device; tundish flow control device 3 integral body are cylindrical; inner chamber adopts upwards tapered configuration; the bottom is concentric circles ripple 32 shapes; molten steel is when when casting, molten steel impacted the bottom of tundish flow control device like this; produce the reflection streamline; because the bottom is the circular wave shape, and cavity is tapered configuration, and molten steel beam energy is offset mutually; thereby the balanced speed of backflowing of molten steel; field trash in the molten steel is fully floated easily adsorbed by the liquid level covering slag, purify hot metal improves continuous casting billet quality; tundish walls is eliminated by the long nozzle factor of washing away; prolong service life, changed the flowability of molten steel simultaneously, eliminates turbulent flow; the adjacent steel water pot mixer time is shortened, reduce mixed weight.With 100t molten steel jar is example, uses the utility model mixer time average to be 4.11min.Than using shock plate mixer time decreased 1.25min, adjacent two jars of molten steel mixed weights reduce 2 tons.
Shown in Fig. 2,3, at the tundish Way out, a side is provided with 3 through holes 33 that are tilted at the bottom of the tundish flow control device chamber, and through hole 33 angles of inclination are 40 °～50 °, and a part of molten steel flows out along through hole, reduces residual steel amount in dead band and the bag.
As shown in Figure 2,31 edges, tundish flow control device upper edge are that arc-shaped structure can make the molten steel beam evenly upwards flow out.
Introduce below one group by LF is taken out of, tundish and strand sample examination total oxygen content, mainly relatively the utility model and shock plate comprise free oxygen and oxide inclusions analysis to the clearance of total oxygen in the molten steel to the removal of total oxygen.
1), use situation of the present utility model, the clearance of total oxygen such as following table:
| Steel grade | Melting number | Total oxygen content % | Clearance % | |
| LF takes out of | Tundish | |||
| AL045 | 9D4473 | 0.0069 | 0.0054 | 21.74 |
| 9D4475 | 0.0056 | 0.0041 | 26.79 | |
| 8D4388 | 0.0051 | 0.0048 | 5.88 | |
| 7D3873 | 0.009 | 0.0059 | 34.44 | |
| On average | 0.00665 | 0.00505 | 24.06 | |
2), use the situation of shock plate, the clearance of total oxygen such as following table:
| Steel grade | Melting number | Total oxygen content % | Clearance % | |
| LF takes out of | Tundish | |||
| AL045 | 8D4244 | 0.0048 | 0.0058 | -20.83 |
| 8D4241 | 0.0057 | 0.0036 | 36.84 | |
| 7D3758 | 0.0073 | 0.0093 | -27.4 | |
| 7D3386 | 0.0020 | 0.0057 | -185 | |
| On average | 0.00495 | 0.0061 | -23.23 | |
Use two kinds of products that the clearance of total oxygen in the molten steel is come comparison, clearance of the present utility model is 24.06%, has not also increased by 23.23% and shock plate not only reduces total oxygen content.So the result of use of the utility model flow control device is better than shock plate.
By experiment, use the utility model after, cold rolling surface is mingled with percent defective and drops at present 0.17% by 6.1%, is lower than predetermined 0.2% target.
Chamber water mould test by experiment, use novel flow control device and the porous barricade is used in combination, molten steel mean residence time 4.94min, response time 1.21min in the tundish, dead space volume is than 9.1%, piston region volume ratio 37.94%, use square flow control device (molten steel mean residence time 4.82min, response time 1.11min, dead space volume is than 11.63%, piston region volume ratio 30.18%) that suitable improvement is arranged.
Claims (4)
1, a kind of medium thin slab continuous casting tundish flow control device is installed on the interior molten steel jar of tundish (1) long nozzle below, it is characterized in that tundish flow control device (3) integral body is cylindrical, and inner chamber adopts upwards tapered configuration, and the bottom is concentric circles ripple (a 32) shape.
2, medium thin slab continuous casting tundish flow control device as claimed in claim 1 is characterized in that, at the tundish Way out, a side is provided with 3 through holes (33) that are tilted at the bottom of tundish flow control device (3) chamber.
3, medium thin slab continuous casting tundish flow control device as claimed in claim 2 is characterized in that, through hole (33) angle of inclination is 40 °～50 °.
4, medium thin slab continuous casting tundish flow control device as claimed in claim 1 is characterized in that, edge, tundish flow control device upper edge (31) is an arc-shaped structure.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 200520091271 CN2799124Y (en) | 2005-06-10 | 2005-06-10 | Flow control device for medium thin slab continuous casting tundish |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 200520091271 CN2799124Y (en) | 2005-06-10 | 2005-06-10 | Flow control device for medium thin slab continuous casting tundish |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN2799124Y true CN2799124Y (en) | 2006-07-26 |
Family
ID=36841622
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN 200520091271 Expired - Fee Related CN2799124Y (en) | 2005-06-10 | 2005-06-10 | Flow control device for medium thin slab continuous casting tundish |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN2799124Y (en) |
Cited By (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102389954A (en) * | 2011-11-08 | 2012-03-28 | 莱芜钢铁股份有限公司 | Continuous casting tundish turbulence controller |
| CN104439136A (en) * | 2014-12-17 | 2015-03-25 | 谢玉红 | Impurity filtering and absorbing flow divider for tundish |
| CN105710357A (en) * | 2014-12-01 | 2016-06-29 | 鞍钢股份有限公司 | Tundish flow control device and method |
| CN106493347A (en) * | 2016-10-25 | 2017-03-15 | 华北理工大学 | Continuous casting tundish quick-change nozzle and the method with its dross inclusion adsorption |
-
2005
- 2005-06-10 CN CN 200520091271 patent/CN2799124Y/en not_active Expired - Fee Related
Cited By (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102389954A (en) * | 2011-11-08 | 2012-03-28 | 莱芜钢铁股份有限公司 | Continuous casting tundish turbulence controller |
| CN102389954B (en) * | 2011-11-08 | 2014-09-03 | 山东钢铁股份有限公司 | Continuous casting tundish turbulence controller |
| CN105710357A (en) * | 2014-12-01 | 2016-06-29 | 鞍钢股份有限公司 | Tundish flow control device and method |
| CN104439136A (en) * | 2014-12-17 | 2015-03-25 | 谢玉红 | Impurity filtering and absorbing flow divider for tundish |
| CN106493347A (en) * | 2016-10-25 | 2017-03-15 | 华北理工大学 | Continuous casting tundish quick-change nozzle and the method with its dross inclusion adsorption |
| CN106493347B (en) * | 2016-10-25 | 2018-07-06 | 华北理工大学 | Continuous casting tundish quick-change nozzle and the method with its dross inclusion adsorption |
Similar Documents
| Publication | Publication Date | Title |
|---|---|---|
| CN2799124Y (en) | Flow control device for medium thin slab continuous casting tundish | |
| CN110315060A (en) | A kind of flow control formula tundish structure may filter that the field trash in molten steel | |
| WO2013190799A1 (en) | Method for manufacturing high-purity steel casting, and tundish | |
| CN2841198Y (en) | Continuous casting tundish with centrifugal rotation | |
| CN105710357A (en) | Tundish flow control device and method | |
| CN201950179U (en) | Novel tundish flowing control device for stainless steel continuous casting | |
| CN208628416U (en) | A kind of double fluid slab tundish flow control element | |
| CN1180596A (en) | Strip casting apparatus | |
| CN1018339B (en) | Dipping-type casting pipe for introducing melted steel into continuous-casting crystallizer | |
| CN102764867B (en) | Straight-through submerged nozzle with stirring effect | |
| CN201186346Y (en) | Immersion water inlet of technique for pouring broad plate blank with double-water inlet | |
| CN102794445B (en) | Slab continuous casting submersed nozzle | |
| CN104999044B (en) | A kind of continuous cast mold constant-current stabilizer | |
| CN2873365Y (en) | Turbulence controller | |
| CN102000811A (en) | Casting flow slot | |
| CN206425485U (en) | A kind of spiral-flow type casting device based on bottom casting | |
| CN201603853U (en) | Quadripuntal submersed nozzle used for pouring conventional plate blank and preventing molten steel turbulence | |
| CN203209684U (en) | Six-hole submerged nozzle for pouring large square blank | |
| CN204640453U (en) | Middle bag flow straightener shaping mould cast outer mold structure | |
| CN201410547Y (en) | Continuous casting tundish current regulator with platform structure | |
| CN2770832Y (en) | Submersed nozzle for sheet billet continuous casting | |
| CN208628417U (en) | A kind of list flowing plate base tundish flow control element | |
| CN103286283B (en) | Water-free type trough for aluminum ingot continuous casting production line | |
| CN215468053U (en) | Continuous casting tundish capable of improving purity of molten steel | |
| CN106623879B (en) | A kind of T-type tundish flow control device |
Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| C14 | Grant of patent or utility model | ||
| GR01 | Patent grant | ||
| ASS | Succession or assignment of patent right |
Owner name: ANGANG NEW STEEL ROLLING CO., LTD. Free format text: FORMER OWNER: XINGANGTIE CO., LTD., ANSHAN IRON AND STEEL GROUP Effective date: 20070302 |
|
| C41 | Transfer of patent application or patent right or utility model | ||
| C56 | Change in the name or address of the patentee |
Owner name: ANGANG STOCK CO., LTD. Free format text: FORMER NAME OR ADDRESS: ANGANG NEW STEEL ROLLING CO., LTD. |
|
| CP03 | Change of name, title or address |
Address after: 114009, No. 63, Wuyi Road, MTR Eastern District, Liaoning, Anshan Patentee after: ANGANG STEEL Co.,Ltd. Address before: 114009, No. 63, Wuyi Road, MTR Eastern District, Liaoning, Anshan Patentee before: Angang New Steel Co.,Ltd. |
|
| TR01 | Transfer of patent right |
Effective date of registration: 20070302 Address after: 114009, No. 63, Wuyi Road, MTR Eastern District, Liaoning, Anshan Patentee after: Angang New Steel Co.,Ltd. Address before: 114001, No. 63, Wuyi Road, MTR Eastern District, Liaoning, Anshan Patentee before: Angang Steel Co.,Ltd. |
|
| C17 | Cessation of patent right | ||
| CF01 | Termination of patent right due to non-payment of annual fee |
Granted publication date: 20060726 Termination date: 20140610 |