CN2746998Y - Immersion type pouring slot for continuously casting special shaped sheet billet - Google Patents
Immersion type pouring slot for continuously casting special shaped sheet billet Download PDFInfo
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- CN2746998Y CN2746998Y CN 200420090590 CN200420090590U CN2746998Y CN 2746998 Y CN2746998 Y CN 2746998Y CN 200420090590 CN200420090590 CN 200420090590 CN 200420090590 U CN200420090590 U CN 200420090590U CN 2746998 Y CN2746998 Y CN 2746998Y
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- expansion
- continuous casting
- thin slabs
- submerged nozzle
- angle
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- 238000007654 immersion Methods 0.000 title abstract description 4
- 238000005266 casting Methods 0.000 title abstract description 3
- 238000009749 continuous casting Methods 0.000 claims description 35
- 230000010339 dilation Effects 0.000 claims description 4
- 230000011218 segmentation Effects 0.000 claims description 3
- 229910000831 Steel Inorganic materials 0.000 abstract description 29
- 239000010959 steel Substances 0.000 abstract description 29
- 238000004519 manufacturing process Methods 0.000 abstract description 6
- 239000012530 fluid Substances 0.000 abstract description 3
- 230000007704 transition Effects 0.000 abstract 2
- 239000000463 material Substances 0.000 abstract 1
- 238000005516 engineering process Methods 0.000 description 5
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 description 5
- 230000008859 change Effects 0.000 description 4
- 238000009826 distribution Methods 0.000 description 4
- 238000000034 method Methods 0.000 description 4
- 239000007788 liquid Substances 0.000 description 3
- 230000008569 process Effects 0.000 description 3
- 230000009467 reduction Effects 0.000 description 3
- 239000002893 slag Substances 0.000 description 3
- RYGMFSIKBFXOCR-UHFFFAOYSA-N Copper Chemical compound [Cu] RYGMFSIKBFXOCR-UHFFFAOYSA-N 0.000 description 2
- 229910052802 copper Inorganic materials 0.000 description 2
- 239000010949 copper Substances 0.000 description 2
- 230000005499 meniscus Effects 0.000 description 2
- 239000011819 refractory material Substances 0.000 description 2
- 230000009286 beneficial effect Effects 0.000 description 1
- 230000008901 benefit Effects 0.000 description 1
- 230000015572 biosynthetic process Effects 0.000 description 1
- 239000011449 brick Substances 0.000 description 1
- 238000001816 cooling Methods 0.000 description 1
- 239000013078 crystal Substances 0.000 description 1
- 230000007547 defect Effects 0.000 description 1
- 238000001595 flow curve Methods 0.000 description 1
- 230000004907 flux Effects 0.000 description 1
- 230000001050 lubricating effect Effects 0.000 description 1
- 238000003754 machining Methods 0.000 description 1
- 230000035772 mutation Effects 0.000 description 1
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Abstract
The utility model relates to an immersion type pouring slot for continuously casting a special shaped sheet billet, comprising a bowl mouth straight pipe section, an expansion section and a shunting section. The bowl mouth straight pipe section is connected with the expansion section through an expansion flow mouth. The expansion curve on the front wall of the expansion flow mouth is in an S shape. The side wall of the expansion flow mouth converges in a straight line shape. The front wall expansion of the expansion section adopts a linear small angle transition mode. The convergence of the side wall adopts the linear small angle transition mode. The utility model has the double functions of both reducing the fluid speed and avoiding the turbulization. In addition, the steel flow speed is steadily reduced. The manufacture of the fire resistive material wall of the immersion type pouring slot becomes simple.
Description
Technical field
The utility model relates to a kind of mouth of a river of guide wire liquation, particularly a kind of submerged nozzle for continuous casting of thin slabs.
Background technology
In the continuous casting steel machine operation, metallic solution has in tundish is incorporated into the metallic crystal device of water-cooling wall with submersed nozzle.The function following points of submersed nozzle: (1) is used for guide molten steel and is injected into the crystallizer and avoids contacting with air from tundish.(2) desirable submersed nozzle also requires molten steel is incorporated in the crystallizer equably and does not have turbulent flow, and keeps the stable of liquid level in the crystallizer.Because the generation of turbulent flow might be rolled into covering slag in the molten steel, thereby produce casting billet surface or latent defect.(3) reduce or eliminate the stationary wave vibration that occurs on the crystallizer meniscus.In sheet billet continuous casting, molten steel is introduced crystallizer and is produced a stationary wave vibration usually, and this stationary wave vibration might be rolled into covering slag in the molten steel, thereby destroys lubricating between new green compact shell and the crystallizer, and might cause bleed-out.
Submerged nozzle for continuous casting of thin slabs and crystallizer for continuous casting of thin slabs have together constituted the core technology of sheet blank continuous casting technology.The interior exterior design of submersed nozzle and the process for machining and manufacturing that satisfy the flow field demand are one of feature technologies of sheet blank continuous casting technology.As submerged nozzle for continuous casting of thin slabs (SEN), because strand is thin, the opening degree of funnel type crystallizer is less relatively, require flat mouthful of submersed nozzle thin-walled on the external form, promptly require a pair of antetheca shape of submersed nozzle progressively to converge one flat mouthful from the circle of water gap bowl portion in some way, on the other hand, because the demand of steel flux self restriction, another of submersed nozzle needs to expand gradually from the circle of water gap bowl portion to the antetheca shape, keeping the constant of immersion inside casing area or to increase, help the reduction of steel flow velocity degree and stable.Universals of existing Submersed nozzle of sheet billet are, the convergence of a pair of antetheca shape in the mouth of a river and another result to the expansion of antetheca shape make mouth of a river cavity shape progressively become a rectangle or shape that is similar to the rectangle inner ellipse that major axis and minor axis constantly change in some way from the circle of water gap bowl portion.
Chinese patent CN1155858A discloses the submersed nozzle that a kind of submergent entry nozzle is an ordinary meaning.The submergent entry nozzle of this invention is made up of three parts: (1) inlet pipeline section with axial symmetry, (2) changeover portions with two or more antethecas and sidewall, (3) shunting sections that have deflection tube and part flow arrangement.The principal character of above-mentioned jet pipe is, by increasing the cross-sectional area of changeover portion considerably, make the flow velocity of molten steel obtain sizable reduction, therefore at changeover portion, the convergency scope of this jet pipe antetheca is 2.0～8.6 degree, and the angle of flare scope of sidewall is 16.6～6.0 degree.The deflection angle of this jet pipe deflection tube is all from about 10～80 degree of vertical direction deflection in each side.From geometric angle as can be known, the restriction result of above-mentioned requirements excursion is, the non-constant width of jet pipe flow-out hole position expansion antetheca, the convergence antetheca is very narrow, not only make the manufacturing processing at the mouth of a river become too difficult, and the result of overdistension is that the center of vorticity of the steel that spues stream is too near to the leptoprosopy of copper plate of crystallizer, is unfavorable for the equilibrium of copper coin heat flow density and the formation of new green compact shell.The overconvergence antetheca makes antetheca too narrow, and the result does not help the reduction of steel flow export speed but it is anti-.
Chinese patent CN1072538C has announced a kind of submerged nozzle for continuous casting of thin slabs.This mouth of a river is made up of straight tube pipe and expansion stem bar angle two parts.The two links to each other by a taper fit portion, it is characterized in that, the surface area of high cross section is less than the surface area of straight tube pipe to expand stem bar top, and the madial wall that expands the narrow side of stem bar forms angles that are less than or equal to 7.5 degree with respect to vertical direction.Expanding the stem bar bottom has a part flow arrangement to be referred to as flow distribution plate, and the molten steel that it will expand in the stem bar is divided into two, and the flow distribution plate bottom along the narrow sidewall shrink of crystallizer, forms two angles that are less than or equal to 7.5 degree to symmetry axis thus between its sidewall and this vertical axis.
The novel point of this patent is, the surface area of high cross section is less than the surface area of straight tube pipe to expand stem bar top, and this point is that the initial flow point down of the molten steel of tundish is moved down in essence, thereby has reduced the initial muzzle velocity of steel stream.Expand stem bar and then steel is flow to end wide distribution of edge knot crystallizer equably.But owing to expand the Kong Weishe side opening that spues of stem bar, the center of vorticity of steel stream will move down, and impact depth is bigger.
Chinese patent CN1478004A has announced a kind of submerged nozzle for continuous casting of thin slabs, and this mouth of a river is made up of three parts, the pipeline section that promptly enters the mouth, the changeover portion with two antethecas and sidewall and a shunting section that has deflection tube and branching block.This patent says that in a sense being understood to is the modified of patent CN1155858A.It introduces two or more steel circulation road again in the middle of the branching block of bottom, the mouth of a river.Make the steel flow distribution more even.But the manufacturing difficulty of processing at the above-mentioned mouth of a river is bigger.The bulk strength of mouth of a river branching block is also influenced.In addition, the less steel circulation road of branching block inside in fact also is easy to generate obstruction in steel pouring process.
The insider understands, the expansion of a pair of antetheca of submerged nozzle for continuous casting of thin slabs and another convergence to antetheca, and its basic goal is for the mouth of a river can be contained in the thin slab mold of narrower section.The stability of molten steel face generally is better than the liquid level of crystallizer for continuous casting of thin slabs in the conventional panels billet crystallizer, and the submersed nozzle of the crystallizer of traditional sheet billet continuous casting is shaped as the hole that spues of straight pipe type and two symmetries, need not adopt the expansion of main part antetheca at the mouth of a river and the convergence of sidewall.Inspired by this, the variation of submerged nozzle for continuous casting of thin slabs shape is after realizing that mouth of a river size and crystallizer " holding " suitable for reading are coordinated, because of reduce the sudden change of geometric dimension of water outlet as far as possible.
Summary of the invention
The purpose of this utility model is to design a kind of special-shaped submerged nozzle for continuous casting of thin slabs, has the dual-use function that reduces fluid velocity and avoid producing turbulent flow; Be beneficial to the steady decrease of steel flow velocity degree, and make the processing and manufacturing of refractory material for immersed sprue wall become easily simple.
For achieving the above object, the technical solution of the utility model is that a kind of special-shaped submerged nozzle for continuous casting of thin slabs is made up of the rim of a bowl straight length, expansion segment and shunting section; Wherein, the rim of a bowl straight length adopts an expansion stem bar to be connected with expansion segment, and the dilation curve that expands the antetheca of stem bar becomes the S type, and the sidewall type that is in line that expands stem bar restrains.
The inner chamber of described expansion stem bar is the ellipse that an area enlarges gradually and elongates.
To finish the ratio of the height of expansion be 0.8～0.1 to described expansion stem bar width extending transversely with expanding stem bar, is preferably 0.25.
Low-angle linear expansion mode is adopted in the antetheca expansion of described expansion segment; Low-angle linear convergence mode is adopted in the convergence of sidewall.
The angle of flare scope of the antetheca of described expansion segment is 0～5 degree, preferred 4 degree; The convergent angle scope of sidewall is 1～2 degree, is preferably 1.5～1.8 degree.
The antetheca of described expansion segment is that the segmentation expansion forms, and total angle of flare scope is 0～5 degree.
The diplopore mode is adopted in the shunting of the described shunting section hole that spues, and two sidewalls of branching block of bottom, the mouth of a river are parallel with the shunting hole madial wall that spues respectively; The low-angle mode is adopted at the angle of inclination of two sidewalls of branching block.
The height of described branching block is 2～0.5 with the ratio of the height in the hole that spues, and is preferably 0.6: 1.。
Two sidewalls of the branching block of described shunting section and central vertical line deviation angle are smaller or equal to 30 degree.
Two sidewalls of described branching block and central vertical line deviation angle equal 15 degree.
Further, the shunting section at the mouth of a river of the present utility model also is provided with the shunting wing, and this shunting wing is connected on the described branching block, and shunting wing top is higher than shunts the upper edge, hole that spues.
Advantage of the present utility model is:
Contrast with prior art, the rim of a bowl straight length of the present utility model adopts one to expand the mode that stem bar is connected with expansion segment, this expansion stem bar has the dual-use function that reduces fluid velocity and avoid producing turbulent flow, be better than prior art expand stem bar simultaneously significantly expansion and simultaneous mutation convergence cause the turbulent problem of molten steel.
The mode of linear low-angle gradual change is adopted in the antetheca expansion that body delivery section of the present utility model is an expansion segment and the convergence of sidewall.Low-angle linear expansion and linear convergence make molten steel flow speed be reduced uniformly in main transportation section, and have greatly avoided the generation of turbulent flow in main transportation section.Prior art adopts such as the mode that deflection tube is set, and adopts multi-angle and adds expansion wall multisection type expansion method, and total expansion wall curve is non-linear, and total expansion angle and total convergent angle are all bigger.Above-mentioned way is not only bad for the steady decrease of steel flow velocity degree, and the processing and manufacturing of refractory material for immersed sprue wall become be difficult to carry out.
The diplopore mode is adopted in the shunting of the described shunting section of the present utility model hole that spues, and two sidewalls of branching block of bottom, the mouth of a river are parallel with the shunting hole madial wall that spues respectively; The low-angle mode is adopted at the angle of inclination of two sidewalls of branching block.Prior art adopts branching block wide-angle water conservancy diversion herein, not only can reduce the area in the hole that spues, and causes near the turbulent flow of the molten steel hole that spues to increase.
Description of drawings
Fig. 1 is the expansion face profile of the utility model mouth of a river embodiment 1;
Fig. 1 a is the A-A cross sectional representation of Fig. 1;
Fig. 1 b is the B-B cross sectional representation of Fig. 1;
Fig. 1 c is the C-C cross sectional representation of Fig. 1;
Fig. 2 is the convergence face profile of the utility model mouth of a river embodiment 1;
Fig. 3 is the expansion stem bar expansion face profile at the utility model mouth of a river;
Fig. 4 is the expansion face profile of the utility model mouth of a river embodiment 2;
Fig. 4 a is the D-D cross sectional representation of Fig. 4;
Fig. 4 b is the E-E cross sectional representation of Fig. 4;
Fig. 4 c is the F-F cross sectional representation of Fig. 4;
Fig. 5 is the convergence face profile of the utility model mouth of a river embodiment 2;
Fig. 6 is the expansion face profile of the utility model mouth of a river embodiment 3;
Fig. 6 a is the G-G cross sectional representation of Fig. 6;
Fig. 6 b is the H-H cross sectional representation of Fig. 6;
Fig. 6 c is the I-I cross sectional representation of Fig. 6;
Fig. 7 is the convergence face profile of the utility model mouth of a river embodiment 3;
The specific embodiment
Below by drawings and Examples, the utility model is elaborated, but content of the present utility model is not limited to embodiment.
Referring to Fig. 1, Fig. 2, special-shaped submerged nozzle for continuous casting of thin slabs embodiment 1 described in the utility model, it is made up of the rim of a bowl straight length 1, expansion stem bar 2, expansion segment 3 and shunting section 4; Submerged nozzle for continuous casting of thin slabs is directly installed in the bottom brick cup of continuous casting tundish, and the rim of a bowl of submersed nozzle directly links to each other with control stream stopper;
As Fig. 1, shown in Figure 3, the dilation curve that expands the antetheca 21 of stem bar 2 becomes the S type, and sidewall 22 type that is in line that expands stem bar 2 restrains, and the inner chamber 20 of described expansion stem bar 2 is the ellipse that an area enlarges gradually and elongates.
To finish the ratio of the height H 2 of expansion be 0.25 to described expansion stem bar 2 width Delta W (w2-w1) extending transversely with expanding stem bar 2.
See also Fig. 1～Fig. 2, Figure 1A～1C again, the antetheca of described expansion segment 2 adopts low-angle linear expansion mode; Low-angle linear convergence mode is adopted in the convergence of sidewall.
The angle of flare α scope of the antetheca of described expansion segment 2 is 4.0 degree; The convergent angle β of sidewall is 1.5～1.8 degree.
Referring to Fig. 1, Fig. 2, the diplopore modes are adopted in spue hole 41 of the shunting of described shunting section 4, and 42 two sidewalls of branching block of bottom, the mouth of a river are parallel with shunting hole 41 madial walls that spue respectively; The low-angle mode is adopted at the angle of inclination of 42 two sidewalls of branching block, and 42 two sidewalls of this branching block and central vertical line deviation angle θ are 15 degree; The spue ratio of height h2 in hole 41 of the height h1 and the shunting of described branching block 42 is 0.6: 1.
Referring to Fig. 4～Fig. 5, Fig. 4 D～Fig. 4 F, it is depicted as embodiment 2 of the present utility model: it is made up of the rim of a bowl straight length 1, expansion stem bar 2, expansion segment 3 and shunting section 4.The rim of a bowl straight length 1 control stream stopper links to each other, and the opening degree curve of the rim of a bowl is consistent with the chock plug of control stream stopper, to keep normal flow curve in the pouring molten steel process.Straight length 1 the rim of a bowl bottom is round straight-tube portion, and its length is selected when designing by the height of tundish chassis.Straight length 1 links to each other by expanding stem bar 2 with expansion segment 3, the dilation curve that expands stem bar 2 antethecas becomes sudden change S type, but it adopts the rounding angle to link to each other with top straight length 1 with bottom expansion segment 3, the height that expands stem bar 2 is 2: 1 with the width of bottom expansion segment 3 herein, and the expansion of mouth of a river antetheca is all finished expanding stem bar 2.
Referring to Fig. 6, Fig. 7 and Fig. 6 A～6C, it is embodiment 3 of the present utility model, and it also is made up of the rim of a bowl straight length 1, expansion stem bar 2, expansion segment 3 and shunting section 4.Mouth of a river sidewall converge linear pattern, convergent angle is 1.6 degree.Expansion segment 3 antethecas at the mouth of a river adopt low-angle linear expansion mode, and total angle of flare of antetheca is 4 degree, and not segmentation.Shunt the hole 41 that spues and adopt 2 hole modes, shunt the angle of inclination of 42 two sidewalls of branching block of 41 bottoms, hole that spue and also adopt the low-angle mode, 42 two sidewalls of branching block and central vertical line deviation angle 15 degree, and left-right symmetry; And shunting section 4 also is provided with the shunting wing 43, and this shunting wing 43 is connected on the described branching block 42, and the shunting wing 43 tops are higher than shunts 41 upper edges, hole that spue.
Submersed nozzle of the present utility model can be stablized and carry molten steel to crystallizer, and mold liquid level is steady, and meniscus does not have volume slag phenomenon to be taken place, and especially is suitable for wide section funnel type crystallizer.
Claims (15)
1. special-shaped submerged nozzle for continuous casting of thin slabs, it is made up of the rim of a bowl straight length, expansion segment and shunting section; It is characterized in that described the rim of a bowl straight length adopts an expansion stem bar to be connected with expansion segment, the dilation curve that expands the antetheca of stem bar becomes the S type, and the sidewall type that is in line that expands stem bar restrains.
2. submerged nozzle for continuous casting of thin slabs as claimed in claim 1 is characterized in that, the inner chamber of described expansion stem bar is the ellipse that an area enlarges gradually and elongates.
3. submerged nozzle for continuous casting of thin slabs as claimed in claim 1 or 2 is characterized in that, to finish the ratio of the height of expansion be 0.8～0.1 to described expansion stem bar width extending transversely with expanding stem bar.
4. submerged nozzle for continuous casting of thin slabs as claimed in claim 1 or 2 is characterized in that, to finish the ratio of the height of expansion be 0.25 to described expansion stem bar width extending transversely with expanding stem bar.
5. submerged nozzle for continuous casting of thin slabs as claimed in claim 1 is characterized in that, the antetheca of described expansion segment adopts low-angle linear expansion mode; Low-angle linear convergence mode is adopted in the convergence of sidewall.
6. as claim 1 or 5 described submerged nozzle for continuous casting of thin slabs, it is characterized in that the angle of flare scope of the antetheca of described expansion segment is 0～5 degree; The convergent angle scope of sidewall is 1～2 degree.
7. as claim 1 or 5 described submerged nozzle for continuous casting of thin slabs, it is characterized in that the antetheca of described expansion segment is that the segmentation expansion forms, total angle of flare scope is 0～5 degree.
8. submerged nozzle for continuous casting of thin slabs as claimed in claim 1 is characterized in that, the diplopore mode is adopted in the shunting of the described shunting section hole that spues, and two sidewalls of branching block of bottom, the mouth of a river are parallel with the shunting hole madial wall that spues respectively; The low-angle mode is adopted at the angle of inclination of two sidewalls of branching block.
9. submerged nozzle for continuous casting of thin slabs as claimed in claim 1 is characterized in that, also is provided with the shunting wing, and this shunting wing is connected on the described branching block, and shunting wing top is higher than shunts the upper edge, hole that spues.
10. submerged nozzle for continuous casting of thin slabs as claimed in claim 1 is characterized in that, the height of described branching block is 2～0.5 with the ratio of the height in the hole that spues.
11. submerged nozzle for continuous casting of thin slabs as claimed in claim 1 is characterized in that, two sidewalls of the branching block of described shunting section and central vertical line deviation angle are smaller or equal to 30 degree.
12., it is characterized in that the expansion angle of the whole antetheca in the described mouth of a river is 4.0 degree as claim 1 or 5 described submerged nozzle for continuous casting of thin slabs.
13. submerged nozzle for continuous casting of thin slabs as claimed in claim 1 is characterized in that, the convergent angle of the whole sidewall in the described mouth of a river is 1.5～1.8 degree.
14. submerged nozzle for continuous casting of thin slabs as claimed in claim 1 is characterized in that, the height of described branching block is 0.6: 1 with the ratio of the height in the hole that spues.
15. submerged nozzle for continuous casting of thin slabs as claimed in claim 1 is characterized in that, two sidewalls of described branching block and central vertical line deviation angle equal 15 degree.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 200420090590 CN2746998Y (en) | 2004-09-28 | 2004-09-28 | Immersion type pouring slot for continuously casting special shaped sheet billet |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 200420090590 CN2746998Y (en) | 2004-09-28 | 2004-09-28 | Immersion type pouring slot for continuously casting special shaped sheet billet |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN2746998Y true CN2746998Y (en) | 2005-12-21 |
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Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN 200420090590 Expired - Fee Related CN2746998Y (en) | 2004-09-28 | 2004-09-28 | Immersion type pouring slot for continuously casting special shaped sheet billet |
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| CN (1) | CN2746998Y (en) |
Cited By (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102398025A (en) * | 2011-12-12 | 2012-04-04 | 辽宁科技大学 | Double-hole immersed waterslot for flexible thin slab casting (FTSC) crystallizer |
| CN102836995A (en) * | 2012-09-06 | 2012-12-26 | 上海宝明耐火材料有限公司 | Submerged nozzle combined die for sheet billet |
| CN102836994A (en) * | 2012-09-06 | 2012-12-26 | 上海宝明耐火材料有限公司 | Production method for submerged nozzle of sheet billet |
| CN110340340A (en) * | 2019-08-22 | 2019-10-18 | 中钢集团洛阳耐火材料研究院有限公司 | A kind of FTSC sheet blank continuous casting immerseable gate molding die and forming method |
| CN114535559A (en) * | 2022-03-21 | 2022-05-27 | 河南省西保冶材集团有限公司 | Immersion type water gap |
-
2004
- 2004-09-28 CN CN 200420090590 patent/CN2746998Y/en not_active Expired - Fee Related
Cited By (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102398025A (en) * | 2011-12-12 | 2012-04-04 | 辽宁科技大学 | Double-hole immersed waterslot for flexible thin slab casting (FTSC) crystallizer |
| CN102836995A (en) * | 2012-09-06 | 2012-12-26 | 上海宝明耐火材料有限公司 | Submerged nozzle combined die for sheet billet |
| CN102836994A (en) * | 2012-09-06 | 2012-12-26 | 上海宝明耐火材料有限公司 | Production method for submerged nozzle of sheet billet |
| CN110340340A (en) * | 2019-08-22 | 2019-10-18 | 中钢集团洛阳耐火材料研究院有限公司 | A kind of FTSC sheet blank continuous casting immerseable gate molding die and forming method |
| CN110340340B (en) * | 2019-08-22 | 2024-03-15 | 中钢集团洛阳耐火材料研究院有限公司 | Forming die and forming method for FTSC sheet billet continuous casting immersion nozzle |
| CN114535559A (en) * | 2022-03-21 | 2022-05-27 | 河南省西保冶材集团有限公司 | Immersion type water gap |
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Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| C14 | Grant of patent or utility model | ||
| GR01 | Patent grant | ||
| C17 | Cessation of patent right | ||
| CF01 | Termination of patent right due to non-payment of annual fee |
Granted publication date: 20051221 Termination date: 20130928 |