CN201572915U - Multi-section tundish upper nozzle capable of blowing argon locally - Google Patents
Multi-section tundish upper nozzle capable of blowing argon locally Download PDFInfo
- Publication number
- CN201572915U CN201572915U CN200920208202XU CN200920208202U CN201572915U CN 201572915 U CN201572915 U CN 201572915U CN 200920208202X U CN200920208202X U CN 200920208202XU CN 200920208202 U CN200920208202 U CN 200920208202U CN 201572915 U CN201572915 U CN 201572915U
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- upper nozzle
- argon gas
- tundish upper
- ventilation area
- area part
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Abstract
The utility model relates to a multi-section tundish upper nozzle capable of blowing argon locally, which comprises a casting tube, a nozzle cap connected with the lower end of the casting tube and an upper sliding plate. A cone-shaped outer steel shell is arranged between the nozzle cap and the upper sliding plate. The inside of the outer steel shell is provided with a cone-shaped multi-section tundish upper nozzle assembly of which the size is matched with that of the outer steel shell. The multi-section tundish upper nozzle assembly of a sectional structure of a non-ventilating region part, a ventilating region part... the ventilating region part and the non-ventilating region part which are assembled alternately and are combined in a stacking mode from top to bottom. The top and the bottom of the multi-section tundish upper nozzle assembly are both the non-ventilating region parts. Compared with the prior art, the multi-section tundish upper nozzle has small argon blowing quantity to make the change degree of the argon blowing quantity small, can control the flow direction of the argon, guarantee enough argon is blown at a mold level, lighten level fluctuation and improve the control accuracy of the sliding plate for a steel stream, can also prevent leakage of the argon and can be arranged on a tundish of any slab continuous casting machine.
Description
Technical field
The utility model relates to casting fused mass field of containers, relates in particular to the segmented tundish upper nozzle that uses in a kind of steel production industry, is applied on the conticaster of steel mill.
Background technology
The conticaster of the steel mill in each tame steel production enterprise is in the molten steel casting process at present, need seal this three place at tundish upper nozzle, slide plate and the argon of critical piece feeds argon gas and makes argon space, argon gas is as a kind of inert gas, can prevent molten steel oxidation effectively, feed argon gas in addition and also have following meaning:
(1) the inner surface formation diaphragm at filling pipe end prevents that filling pipe end from stopping up;
(2) promote inclusion floating in the interior molten steel of tundish;
(3) hinder the molten steel field trash and assemble, prevent the obstruction of submersed nozzle to mouth of a river inwall;
(4) prevent that the crystallization liquid level from tying meanings such as cold steel and the formation of promotion covering slag melting layer.
Filling pipe end all generally adopts monoblock type Argon structure in the produced on-site under the prior art, and argon gas enters gap between anti-material and the box hat by argon blowing hole, and then enters into molten steel by air brick.But it is big often to occur argon flow amount in casting process, but the mold liquid level reaction does not have the phenomenon of argon gas, the size of argon gas amount and pressure are along with the variation fluctuation of tundish tonnage and steel-passing amount is bigger simultaneously, be unfavorable for the control of slab quality and argon gas consumption, and because the argon gas trend can not be controlled, filling pipe end leaks under the multiple action of multiple factors such as argon gas easily, and the effect in using at the scene is unsatisfactory.
And the bad main cause of the Argon performance of filling pipe end is as described below in the casting process:
1, the trend of argon gas can not be controlled.Monoblock type Argon structure under the prior art enters into the molten steel argon gas and is upwards entering tundish by filling pipe end and entering into downwards argon gas amount big or small uncertain of crystallizer with molten steel.
2, the trend of argon gas changes greatly with the change of steel-passing amount.With the increase of steel-passing amount, molten steel increases the impulsive force of argon gas, and the argon gas that causes flowing down with steel increases; When steel-passing amount reduced, molten steel reduced the impulsive force of argon gas, and the argon gas that flows down with steel reduces.
3, the trend of argon gas changes greatly with the change of tundish tonnage.With the variation of tundish tonnage, the static pressure of argon gas also changes, and causes trend to change.
4, the argon gas of filling pipe end top/bottom is revealed.Though the filling pipe end top/bottom matcoveredn under the prior art, under high temperature action, protective layer is easy to be etched, and causes argon gas to leak from the top/bottom of filling pipe end easily.
5, the slot leakage of argon gas between anti-material and box hat.If the sealing property between anti-material and the box hat is bad, cause argon gas between the slit, to leak easily.Simultaneously since box hat under high temperature action, software causes the sealing property of connecting portion bad easily, equally also can cause gas leak phenomenon.
6, because the trend and the flow of argon gas can not be controlled, cause that argon gas can not smooth and easyly blow out in the casting process, cause field trash in the molten steel to be adsorbed on the inner surface of submersed nozzle, cause bias current, form the fluctuation of crystallizer liquid steel level.
7, because the unordered variation of argon gas in the casting process also can cause slide plate that there is accuracy error in the control of steel stream, equally also can cause the liquid fluctuating of crystallizer molten steel.
Because the existence of above shortcoming, cause in normal productive process, the Argon performance of filling pipe end can not be guaranteed, the operative employee wants constantly to carry out the adjusting of Argon amount size according to the variation of cast situation, and because blowing argon gas control difficulty causes the quality of slab not to be guaranteed, make the consumption of argon gas to be effectively controlled in addition, increased production cost greatly.
The utility model content
In order to address the above problem, novel tundish upper nozzle should satisfy following condition:
(1) the Argon amount of novel tundish upper nozzle should be littler than the Argon amount of the filling pipe end under the prior art;
(2) the Argon amount of the novel tundish upper nozzle degree that should change along with the variation of steel-passing amount should be less;
(3) size of the Argon amount of the novel tundish upper nozzle degree that should change with the variation of tundish tonnage also should be less;
(4) novel tundish upper nozzle wants to prevent the leakage of argon gas;
(5) novel tundish upper nozzle wants to control the trend of argon gas;
(6) novel tundish upper nozzle is wanted to guarantee to have in the mold liquid level sufficient argon gas to blow out;
(7) novel tundish upper nozzle wants to alleviate to a certain extent the liquid fluctuating of crystallizer, improves the control accuracy of slide plate to steel stream.
In sum, the utility model provides a kind of multisection type tundish upper nozzle that can local blowing argon gas, this utility model is by having changed the structure of the monoblock type tundish upper nozzle under the prior art, the trend that has solved the argon gas under the prior art can not be controlled, the Argon performance of filling pipe end can not be guaranteed, the slot leakage of argon gas at the filling pipe end top and between anti-material and box hat or the like problem, and the utility model concrete structure is as described below:
A kind of multisection type tundish upper nozzle that can local blowing argon gas, comprise out depositing, with open mouth of a river cap, the upper slide that the depositing lower end is connected, between mouth of a river cap and upper slide, be provided with vertebra face body shape one outside box hat, it is characterized in that:
Be provided with the multisection type tundish upper nozzle assembly of a vertebra face body shape that matches with outer box hat size in the described outer box hat, this multisection type tundish upper nozzle assembly is the segmentation structure of the stacked combination of this staggered combination of non-ventilation area part, ventilation area part, non-ventilation area part, ventilation area part and non-ventilation area part from top to bottom.
This segmentation structure is the most important structure division of the utility model, makes the effect that its acquisition can local blowing argon gas.
According to a kind of multisection type tundish upper nozzle that can local blowing argon gas of the present utility model, it is characterized in that, described multisection type tundish upper nozzle assembly, its top and bottom are non-ventilation area part.
Top of the present utility model and bottom are non-ventilation area part, can not leak from the non-ventilation area part of top/bottom when making blowing argon gas, promptly the argon gas of the filling pipe end top/portion under the prior art are revealed to have made targetedly and improve
According to a kind of multisection type tundish upper nozzle that can local blowing argon gas of the present utility model, it is characterized in that, its bosom of multisection type tundish upper nozzle assembly of described vertebra face body shape connects a molten steel and pours into through hole, cap junction, the mouth of a river diameter that this molten steel pours into through hole and top is bigger, less with the upper slide junction diameter of bottom, promptly to pour into the vertical section of through hole be one trapezoidal to this molten steel.
The trapezoidal molten steel that falls pours into through hole makes argon gas to blow out from the upper/lower terminal that molten steel pours into through hole, reduced the Argon amount of filling pipe end, the degree that makes the Argon amount change along with the variation of steel-passing amount is less, and the Argon amount is also less with the degree that the variation of tundish tonnage changes.
According to a kind of multisection type tundish upper nozzle that can local blowing argon gas of the present utility model, it is characterized in that described ventilation area part is the blowing argon gas zone, its cross section is the trapezoidal brick shape.
The ventilation area part is used small-particulate materials high temperature resistant, refractory material to mix the after vibration pressurization with powdered material and is fired formation, has obtained to be blown into the effect of argon gas.
According to a kind of multisection type tundish upper nozzle that can local blowing argon gas of the present utility model, it is characterized in that, the cross section of described non-ventilation area part also is the trapezoidal brick shape, and matches with the size of ventilation area part, is the segmentation structure of the folded combination of staggered combination layer.
Non-ventilation area part material identical with the material of ventilation area part, non-ventilation area part is used bulky grain material high temperature resistant, that refractory material is made to mix with powdered material to suppress and is formed.For guaranteeing that non-ventilation area part and ventilation area part can be good at combination, can not produce the generation that causes the different abnormal conditions such as handing-over position cracking, gas leakage even fracture that produce of hot expansion system owing to the composition deviation, therefore airtight part has been selected and ventilative part identical materials.And, adopted the granularity that increases material in order to guarantee the performance of airtight part, and simultaneously with the part efflorescence of material, the way of suppressing then with the bulky grain material, thus reach the air-locked purpose of material.
Use the utility model to obtain following beneficial effect:
(1) multisection type tundish upper nozzle that can local blowing argon gas of the present utility model has adopted fire-resistant, exotic material in the non-ventilation area of top/bottom part, can prevent that argon gas from revealing from the non-ventilation area part of filling pipe end top/bottom.
(2) multisection type tundish upper nozzle that can local blowing argon gas of the present utility model has adopted the partitioning scheme of the stacked combination of staggered combination of ventilation area part and non-ventilation area part, can guarantee that the argon gas that enters from the ventilation area part on top blows out from the upper end of filling pipe end, the argon gas that enters from the ventilation area part of bottom blows out from the lower end of filling pipe end, thereby the trend of control argon gas guarantees to enter the central argon gas amount of crystallizer downwards.
(3) multisection type tundish upper nozzle that can local blowing argon gas of the present utility model, the argon gas that has obtained the filling pipe end upper area changes bigger along with the variation of steel-passing amount, and the argon gas of the central region of filling pipe end changes less effect along with the variation of steel-passing amount, has reduced to enter the sensitivity of the central argon gas amount of crystallizer to steel-passing amount.
(4) in the argon gas that blown out of multisection type tundish upper nozzle that can local blowing argon gas of the present utility model, the argon gas that has only upper area changes bigger with the variation of tundish tonnage, the argon gas of central region changes less along with the variation of tundish tonnage, thereby reduces the sensitivity of argon gas to the tundish tonnage.
(5) of the present utility model can local blowing argon gas the multisection type tundish upper nozzle use after, the Argon amount is obviously lacked than the Argon amount of the monoblock type filling pipe end under the prior art, has directly reduced production cost.
(6) of the present utility model can local blowing argon gas the multisection type tundish upper nozzle use after, reduced the sensitivity of argon gas to steel-passing amount, tundish tonnage, effect makes liquid level fluctuation of crystallizer be clearly better thus, has improved the control accuracy of slide plate to steel stream simultaneously.
Description of drawings
Fig. 1 is the concrete structure schematic cross-section of a kind of multisection type tundish upper nozzle that can local blowing argon gas of the present utility model;
Fig. 2 is that the argon gas stream of a kind of multisection type tundish upper nozzle that can local blowing argon gas of the present utility model is to schematic diagram;
Fig. 3 is the concrete scheme of installation of a kind of multisection type tundish upper nozzle that can local blowing argon gas of the present utility model.
Among the figure: 1-opens depositing, 2-mouth of a river cap, and the 3-upper slide, the outer box hat of 4-, 5-multisection type tundish upper nozzle assembly, the non-ventilation area of 6-part, 7-ventilation area part, the 8-molten steel pours into through hole.
The specific embodiment
Below in conjunction with drawings and Examples multisection type tundish upper nozzle that can local blowing argon gas of the present utility model is described further.
Embodiment
Choose high temperature resistant refractory material in the present embodiment and make the ventilation area part 7 of the multisection type tundish upper nozzle assembly 5 of multisection type tundish upper nozzle that can local blowing argon gas of the present utility model, this ventilation area part is mainly by Al
2O
3, ZrO
2, SiO
2The cross section that combines of proportioning be trapezoidal brick shape structure.And choose Al
2O
3, ZrO
2, SiO
2The reasons are as follows:
1, Al
2O
3Pure aluminium oxide is white amorphous powder, and 2050 ℃ of fusing points, 2980 ℃ of boiling points are water insoluble, Al
2O
3As the base material of multisection type tundish upper nozzle 5, the erosion of high temperature resistant molten steel effectively, and under the immixture of high-temperature molten steel and argon gas, can keep base shape and do not produce distortion.
2, ZrO
2Be a kind of senior refractory raw material, its melt temperature is about 2900 ℃, and heat endurance is preferably arranged.
3, SiO
2Colourless transparent crystal or white powder, fusing point height, hardness be big, be insoluble in water.
After in puddle mixer, mixing more than the 10min above-mentioned batching evenly, adopt the vibration extrusion forming, the frequency of shake table surpasses more than the 2000Hz, amplitude 1-3mm, control granularity, moisture and the time of vibration of pug simultaneously well, through 110 ℃ of high temperature, the time is the 24h drying after the moulding, and then through 1600 ℃ of superhigh temperature, the time is that 6h fires and forms.
Al wherein
2O
3Scope between 65-80%, ZrO
2Scope between 10-15%, SiO
2Scope between 8-14%, all the other are the auxiliary bonding pressed material of other types.
The material of ventilation area part 7 is such as following in the present embodiment:
Al2O3(％)：72±1％；
ZrO2(％)：12±0.5％；
SiO2(％)：10±0.5％。
All the other are auxiliary bonding pressed material.
And in order to guarantee that the ventilation area part 7 and the non-ventilation area part 6 that can be blown into argon gas can be good at combination, can not produce the generation that causes the different abnormal conditions such as handing-over position cracking, gas leakage even fracture that produce of hot expansion system owing to the composition deviation, so the cross section has been selected and ventilation area part 7 identical materials for the non-ventilation area part 6 of trapezoidal brick shape structure also.For guaranteeing the performance of airtight part, its difference is, has increased the granularity of material, with the efflorescence of material part, suppresses with the bulky grain material then simultaneously, thereby reaches the air-locked purpose of material.
In the present embodiment can local blowing argon gas the total length of multisection type tundish upper nozzle be 218MM, be divided into 5 segmentations, promptly be divided into these 5 sections of non-ventilation area part → ventilation area part → part ventilation area, non-ventilation area parts → non-ventilation area part, its every section size under last is: 40MM, 78MM, 40MM, 54MM and 6MM add up to length overall 218MM.
At last as shown in figures 1 and 3, (bosom connects a molten steel that falls scalariform and pours into through hole 8 with the stacked multisection type tundish upper nozzle assembly 5 that is combined into the vertebra face body shape of a segmentation structure of the staggered combination of above-mentioned non-ventilation area part 6 and non-ventilation area part 7 parts, and be non-ventilation area part topmost and bottom) in the outer box hat 4 of the vertebra face body shape that matches with multisection type tundish upper nozzle assembly of the size of packing into, promptly make multisection type tundish upper nozzle that can local blowing argon gas of the present utility model, its upper end is connected with mouth of a river cap 2, and the lower end is connected and can uses with upper slide 3.
Concrete result of use is as follows in the present embodiment:
Table 1
Table 2
The flow that uses multisection type tundish upper nozzle that can local blowing argon gas of the present utility model as can be known by table 1 and the table 2 obviously flow than the common mouth of a river of prior art is low, and promptly the Argon amount is littler than prior art, and it is less to make that the Argon amount changes degree.
In addition as shown in Figure 2, because the argon gas of multisection type tundish upper nozzle that can local blowing argon gas of the present utility model blows out (Fig. 2 shown in the arrow) from the upper/lower terminal that molten steel pours into through hole 8, can control the trend of argon gas, can guarantee to have in the mold liquid level sufficient argon gas to blow out, alleviate the liquid fluctuating of crystallizer to a certain extent, improve the control accuracy of slide plate, and can prevent the leakage of argon gas steel stream.
Multisection type tundish upper nozzle that can local blowing argon gas of the present utility model is simple in structure, and cost is lower, can be installed on the tundish of any slab caster, is applicable to the tundish field of the conticaster of the iron-smelter in the steel production industry.
Claims (5)
- One kind can local blowing argon gas the multisection type tundish upper nozzle, comprise out depositing (1), with open mouth of a river cap (2), the upper slide (3) that the depositing lower end is connected, between mouth of a river cap and upper slide, be provided with vertebra face body shape one outside box hat (4), it is characterized in that:Be provided with the multisection type tundish upper nozzle assembly (5) of a vertebra face body shape that matches with outer box hat size in the described outer box hat (4), this multisection type tundish upper nozzle assembly is the segmentation structure of the stacked combination of this staggered combination of non-ventilation area part (6), ventilation area part (7), non-ventilation area part, ventilation area part and non-ventilation area part from top to bottom.
- 2. a kind of multisection type tundish upper nozzle that can local blowing argon gas as claimed in claim 1 is characterized in that, described multisection type tundish upper nozzle assembly (5), and its top and bottom are non-ventilation area part (6).
- 3. a kind of multisection type tundish upper nozzle that can local blowing argon gas as claimed in claim 1, it is characterized in that, its bosom of multisection type tundish upper nozzle assembly (5) of described vertebra face body shape connects a molten steel and pours into through hole (8), mouth of a river cap (2) the junction diameter that this molten steel pours into through hole and top is bigger, less with upper slide (3) the junction diameter of bottom, promptly to pour into the vertical section of through hole be one trapezoidal to this molten steel.
- 4. a kind of multisection type tundish upper nozzle that can local blowing argon gas as claimed in claim 1 is characterized in that described ventilation area part (7) is the blowing argon gas zone, and its cross section is the trapezoidal brick shape.
- 5. a kind of multisection type tundish upper nozzle that can local blowing argon gas as claimed in claim 1, it is characterized in that, the cross section of described non-ventilation area part (6) also is the trapezoidal brick shape, and matches with the size of ventilation area part (7), is the segmentation structure of the folded combination of staggered combination layer.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN200920208202XU CN201572915U (en) | 2009-08-21 | 2009-08-21 | Multi-section tundish upper nozzle capable of blowing argon locally |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN200920208202XU CN201572915U (en) | 2009-08-21 | 2009-08-21 | Multi-section tundish upper nozzle capable of blowing argon locally |
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| Publication Number | Publication Date |
|---|---|
| CN201572915U true CN201572915U (en) | 2010-09-08 |
Family
ID=42692796
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| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN200920208202XU Expired - Fee Related CN201572915U (en) | 2009-08-21 | 2009-08-21 | Multi-section tundish upper nozzle capable of blowing argon locally |
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|---|---|
| CN (1) | CN201572915U (en) |
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN106041045A (en) * | 2016-08-04 | 2016-10-26 | 山东钢铁股份有限公司 | Continuous casting tundish diffuse-type gas-permeable ring upper nozzle brick cup and argon blowing refining method thereof |
| CN114042906A (en) * | 2021-11-15 | 2022-02-15 | 攀钢集团研究院有限公司 | Submerged nozzle and method for improving heavy rail non-metallic inclusion control |
-
2009
- 2009-08-21 CN CN200920208202XU patent/CN201572915U/en not_active Expired - Fee Related
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN106041045A (en) * | 2016-08-04 | 2016-10-26 | 山东钢铁股份有限公司 | Continuous casting tundish diffuse-type gas-permeable ring upper nozzle brick cup and argon blowing refining method thereof |
| CN114042906A (en) * | 2021-11-15 | 2022-02-15 | 攀钢集团研究院有限公司 | Submerged nozzle and method for improving heavy rail non-metallic inclusion control |
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Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| C14 | Grant of patent or utility model | ||
| GR01 | Patent grant | ||
| CF01 | Termination of patent right due to non-payment of annual fee | ||
| CF01 | Termination of patent right due to non-payment of annual fee |
Granted publication date: 20100908 Termination date: 20160821 |