CN205519625U - Device for preventing metallurgical pouring produces swirl and rolls up sediment - Google Patents
Device for preventing metallurgical pouring produces swirl and rolls up sediment Download PDFInfo
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- CN205519625U CN205519625U CN201620091435.6U CN201620091435U CN205519625U CN 205519625 U CN205519625 U CN 205519625U CN 201620091435 U CN201620091435 U CN 201620091435U CN 205519625 U CN205519625 U CN 205519625U
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Abstract
The utility model discloses a device for preventing metallurgical pouring produces swirl and rolls up sediment, including metallurgical reactor and pouring interface, the pouring interface includes upper plate, medium plate and hypoplastron, it is equipped with the through -hole to go up the hypoplastron, the medium plate is equipped with two through -holes, is equipped with the washer in one of them through -hole, the upper plate lower surface is equipped with the upper groove, and the hypoplastron upper surface is equipped with the low groove, the medium plate is located the space of upper groove and low groove constitution, the medium plate can slide for upper plate and hypoplastron. The utility model discloses being different from the mobile control model of present swirl, eliminating the tangential motion speed that the molten steel swirl flows through the mode of transform tapping hole inner structure form in metallurgical reactor tapping process, and then can show the critical height that the reduction produced the swirl, prevent that upper slag from being entrainmented into the low reaches reactor, control is the quantity of slag down.
Description
Technical field
The utility model belongs to metallurgical placingJi Shu field, is specifically related to a kind of device preventing metallurgical reaction casting process from producing vortex slag.
Background technology
Along with high-quality steel and the development of property steel, to steel-making, refine and pour into a mould link steel quality and propose more strict requirements.Due to the impact of molten steel initial flow state in metallurgical reaction (such as converter, ladle and tundish) casting process; in the cast middle and later periods, vortex motion phenomenon can occur; through Air-core Vortex can be produced in the case of Yan Chong; the slag blanket on molten steel upper strata is rolled up inspiration and enters downstream reactor; broken slag blanket particle can cause size different, and some meetings are floated and removed, and some fine particle is trapped in molten steel because being difficult to remove; form the non-metallic inclusion in steel, eventually affect the serviceability of steel.To this end, in order to prevent whirlpool slag in actual production, often detected in Lower proterozoic group system and closed tapping hole immediately when slag is involved in, the molten steel so making part not pour into a mould becomes steel scrap and returns to smelting iron and steel flow process, reduces the recovery rate of molten steel.
In order to prevent whirlpool slag phenomenon, domestic and international iron and steel enterprise develops multiple vortex inhibitor.Within 1984, United States Patent (USP) US4601415 describes a kind of pyramid molten steel eddy current suppressor, this suppressor is many prismed conical that a kind of proportion is made with refractory material between molten steel and slag, cone center has a steel ball to make cone fixed point keep down, decline with molten steel face, cone can gradually block the mouth of a river, the generation and pushing off the slag, its proportion being disadvantageous in that cone and the center that stop vortex motion are difficult to accurate assurance, and this suppressor processing and forming industry is more complicated.Zhong Ye company proposes a circular cylindrical cavity in existing slide gate nozzle system-based, outputs 4 outlets on cavity facade symmetrically, promotes molten steel to be changed into bottom horizontal flow sheet behind bottom, can suppress the vortex motion in casting process accordingly；Owing to spin-ended device is made up of refractory material, being washed away by molten steel for a long time, its service life is difficult to identical with the ladle liner life-span, needing additional maintenance, cost is very big, and can produce secondary pollution in scour process, particularly can produce certain whirlpool that confluxes latter stage in cast, it is impossible to industrial applications.In addition, researcher is also had to propose the spin-ended method of mouth of a river air blowing, the inert gas relying on reactor bottom to be blown into destroys the tangential motion speed of vortex molten steel, the effect stoping vortex motion can be played, conservative control bottom blowing tolerance is needed during use, prevent the excessive liquid level caused of tolerance exposed, easily cause secondary oxidation of steel.
In general, in prior art, slide gate nozzle system owing to having that cost is high, installation position is fixed, pour into a mould can produce conflux vortex latter stage, continuous cast can cause the defects such as secondary oxidation pollutant rising, other spin-ended methods equally exist steel more than excess, reduce the passive measure of metal yield；A kind of new design of the most necessary research and development device simple, that easily realize, can effectively stop vortex, and the service life of this resistance cyclone is long, have stronger actual application value.
Summary of the invention
The utility model provides a kind of simple and easy to do device preventing metallurgical reaction cast from producing vortex slag, this device can effectively stop the vortex slag phenomenon in metallurgical reaction casting process, and service life is long, can be applicable to the casting process of metallurgical process ferrous materials and other metal material, being applicable to the transmitting procedure of all types of fluid, the vortex control mode of proposition can be that other industry uses for reference use.
The purpose of this utility model is achieved through the following technical solutions:
A kind of device preventing metallurgical reaction cast from producing vortex slag, including metallurgical reaction and cast interface；Described cast interface includes upper plate, middle plate and lower plate；Described upper plate is provided with upper plate through hole；Described lower plate is provided with lower plate through hole；Described middle plate is provided with the first through hole and the second through hole；It is provided with washer in described second through hole；Described upper plate is connected with the outlet of metallurgical reaction by middle siphunculus；Described lower plate is connected with upper plate；Described upper plate lower surface is provided with upper groove；Described lower plate upper surface is provided with low groove；Described middle plate is positioned at the space of upper groove and low groove composition；Described middle plate can slide relative to upper plate and lower plate.
The utility model is used for stoping metallurgical reaction cast to produce vortex slag latter stage, and metallurgical reaction can be steelmaking converter, Con casting ladle, tundish etc.；Middle plate slide through control system control, for the utility model, the control mode that middle plate slides with upper plate and lower plate relatively does not limits, and existing driver can be used to connect and control, for small-sized ladle, during manual twitch mode also can be used to control, plate slides。
Cast interface of the present utility model is three-decker, is divided into three blocks, upper, middle and lower plate according to virtual condition, controls metal liquid flow, for core parts of the present utility model；Upper plate such as waters steel container outlet by middle siphunculus and is connected with metallurgical reaction, uses argon gas-sealed, upper plate through hole to keep centering with lower plate through hole simultaneously；The preferably circular through hole of through hole；Middle plate is slide plate, has two through holes, and one is typical circular clear opening, and another is the circular clear opening being provided with washer；Metal fluid first flows out from metallurgical reaction outlet, through upper plate through hole, then plate through hole in passing through, finally enter from lower plate through hole and receive reactor, carry out lower sequence work.It is further preferred that upper plate through hole, the first through hole, the second through hole are consistent with the shape size of lower plate through hole, beneficially metal liquid smooth flow, also can avoid leaked liquid.
In technique scheme, lower plate can be arranged on below upper plate by screw or bolt, it is also possible to welds or is bonded in below upper plate, thus upper groove forms a space with low groove, middle plate is positioned at this space, fills this space, upper and lower plates connects, and keeps middle slide plate to be in sealing state,Prevent metal liquid from leaking；In order to easy to process, preferably groove is regular shape, square, circular or polygon etc.；For the slip of plate in accurately controlling, upper groove the most through upper plate lower surface, the most through next upper surface of low groove, i.e. middle plate can be in the slip of groove, without passing groove.
In technique scheme, the washer in middle plate the second through hole is at least 2；All washers are symmetric form, and the phase place angle between the most each catch keeps equal；Further preferably, washer is 120 ° of arrangements of 3 chip, it is also possible to be 90 ° of asymmetrical arrangement of 4 chip, 72 ° of arrangements of 5 chip and 6 60 ° of arrangements of chip etc.；0.3～1 times of catch a length of metallurgical reaction outlet inner radius, preferably 0.5 times；Catch thickness is equal with middle plate thickness, and washer width does not limits, and selects to limit voluntarily according to metalline and flow；Washer length finger stop sheet is stretched to the length of the second through hole axis by the second through hole madial wall；Second through hole of different structure size prevents the effect of whirlpool slag to be superior to through type opening.
Preferably in technical scheme, in order to prevent plate cracking and avoid molten metal to enter crack, upper plate is formed around upper plate lock ring, and middle plate is formed around middle plate lock ring, and lower plate is formed around lower plate lock ring；Lock ring is steel band, and width selects according to plate thickness, and lock ring thickness is generally 1.5～2.5mm；All plates all with hoop constraint, are prevented effectively from plate cracking, prevent molten metal from penetrating into, be greatly increased the service life of interface arrangement.
Utilizing said apparatus can effectively prevent metallurgical reaction cast from producing vortex slag, concrete grammar is, before cast starts, middle plate is positioned at the space of upper groove and low groove composition, the first through hole and upper plate through hole, lower plate through hole centering；It is then turned on cast；When in metallurgical reaction, residual metallic liquid reaches vortex threshold limit value, plate in slip, by the second through hole and upper plate through hole, lower plate through hole centering, continues cast until terminating；Thus effectively prevent metallurgical reaction cast from producing vortex slag.
The utility model can apply to steelmaking converter tapping middle and later periods, Con casting ladle cast latter stage and basket pouring later stage etc.；Early stage and mid-term at casting process, by Board position in controlling, centering is kept to carry out normal pouring with the outlet of upper and lower two-layer slide plate straight-through for the typical circular of middle plate outlet, when casting process enters the later stage, system monitoring to be i.e. up to formed vortex critical liquid between height time, Board position in adjustment, exported and switched to the second through hole that washer is set, proceeding later stage cast, the state that can regulate non-full centering in normal casting process reduces steel-passing amount.Use this kind of control mode latter aspect can extend outlet washer life-span, it is important that can after being cast the phase control whirlpool slag phenomenon.
In the utility model, the upper plate of the cast interface of novel three layers of skateboard is connected with metallurgical reaction outlet, and uses inert gas (such as argon gas) to be tightly connected position；Lower plate and follow-up reception reactor type of attachment receive reactor and different according to concrete, as steelmaking converter, then without connecting other parts, and direct tapping；For Con casting ladle, lower plate needs to be connected with tundish long nozzle；For continuous casting production, lower plate needs to be connected with crystallizer submersed nozzle (SEN), and connecting portion needs to use inert gas seal, prevents connecting portion air-breathing from causing secondary oxidation of steel to be contaminated.
After slide plate connection terminates, regulation middle level slide plate, prototype clear opening and upper lower skateboard opening are kept centering, later on cast pattern, molten steel passes through upper slide mouth, middle slide plate mouth and lower skateboard mouth with this, the next reactor of entrance.It is constant that the whole cast first half stage is always maintained at this cast pattern.
When casting process enters rear half stage, according to relation between liquid steel level height and remaining Metal Weight in reactor, the falling head of real-time estimate liquid steel level, when liquid steel level reaches critical vortex height, adjust middle level slide plate, in making the outlet that washer is set relative with the outlet of upper lower skateboard, then proceed by cast, outlet with washer just can limit the tangential flow velocity of molten steel, plays the purpose stoping vortex motion.In the casting process of latter half, keep this pattern constant.Until liquid level is reduced to extremely low state, switches to be controlled cast pattern by slag monitoring system interlink, once monitor mouth of a river slag, close tapping hole immediately, complete whole casting process.
The beneficial effects of the utility model:
(1) the utility model makes public for the first time a kind of device that can effectively prevent metallurgical reaction cast from producing vortex slag, middle level slide plate at cast interface additionally arranges a tapping hole with washer, can realize pouring into a mould the effect of later stage prevention vortex motion by the washer arranged；The utility model method is simple, applies remarkably productive.Use the resistance rotation technology that the utility model proposes, can be substantially reduced or even eliminate the vortex slag phenomenon in metallurgical reaction cast later stage, significantly reduce the Yu Gangliang in reactor cast later stage, compared with prior art can reduce by 40%, improve molten steel recovery rate, cleaning high-quality molten steel, steady production strand and the internal soundness of stocking is provided for lower procedure.
(2) the utility model by arranging the washer structure of multi-form at cast interface internal, utilizes washer to stop the tangential flow velocity of vorticla motion, postpones or even eliminate the swirl flow phenomenon in cast latter stage；A vortex slag difficult problem in the existing metallurgical reaction casting process of solution is had and significantly applies effect；The lower quantity of slag can be reduced with minimally, be conducive to the raising of the cleanliness factor of molten steel, provide high-quality molten steel for STEELMAKING PRODUCTION, meet the follow-up producing process challenging needs to steel quality, especially for high-quality steel, the production of excellent special steel, the utility model has higher industrial application value.
Accompanying drawing explanation
Fig. 1 is the structural representation of the device preventing metallurgical reaction cast generation vortex slag；
Fig. 2 is that embodiment one pours into a mould the upper plate of interface, middle plate and lower plate structure schematic diagram；
Fig. 3 is that embodiment one pours into a mould interface operation process schematic；
Fig. 4 is the middle plate structure schematic diagram that embodiment two pours into a mould interface；
Wherein, metallurgical reaction 1, cast interface 2, upper plate 3, middle plate 4, lower plate 5, middle siphunculus 6, upper plate through hole 7, lower plate through hole the 8, first through hole the 9, second through hole 10, washer 11, upper plate lock ring 12, middle plate lock ring 13, lower plate lock ring 14.
Detailed description of the invention
Hereinafter with reference to accompanying drawing, the case that is preferable to carry out of the present utility model is described in detail.Should be appreciated that and be preferable to carry out case only for explanation the utility model rather than in order to limit protection domain of the present utility model.
Embodiment one
Seeing accompanying drawing 1-2, a kind of device preventing metallurgical reaction cast from producing vortex slag, including metallurgical reaction 1, cast interface 2；Cast interface includes upper plate 3, middle plate 4 and lower plate 5；Upper plate is connected with the outlet of metallurgical reaction by middle siphunculus 6；Lower plate is connected by screw with upper plate；Middle plate can slide relative to upper plate and lower plate；In using pull bar to control, plate slides, and pull bar can be connected with cylinder or driver etc., it is also possible to manual operation.Upper plate 3 is formed around upper plate lock ring 12, and middle plate 4 is formed around middle plate lock ring 13, and lower plate 5 is formed around lower plate lock ring 14；Lock ring is steel band, and width is suitable with thickness of slab, and lock ring thickness is 2mm, is prevented effectively from plate cracking, prevents molten metal from penetrating into, be greatly increased the service life of interface arrangement.Upper plate 3 is provided with upper plate through hole 7, and lower plate 5 is provided with lower plate through hole 8, and upper plate through hole keeps centering with lower plate through hole；Middle plate 4 is provided with the first through hole 9 and the second through hole 10；Being provided with washer 11 in second through hole, washer is 120 ° of arrangements of 3 chip, is symmetric；Washer can be one-body molded with middle plate；Upper plate lower surface is provided with upper groove, and lower plate upper surface is provided with low groove；Middle plate is positioned at the space of upper groove and low groove composition, fills the space of upper groove and low groove composition.Upper plate through hole, the first through hole, the second through hole are consistent with the shape size of lower plate through hole, are all manhole.
Domestic certain steel mill 250t steelmaking converter, tapping hole diameter 180mm, the above-mentioned device preventing metallurgical reaction cast from producing vortex slag is utilized to prevent metallurgical reaction cast from producing vortex slag, use these three layers cast interface shape, middle plate the second via design becomes three-chip type washer structure, it is uniformly distributed in 120 °, a length of 45mm of washer.
Step 1: the upper slide of three layers of cast interface is connected with converter outlet, and uses inert gas (argon gas) to be tightly connected position.The type of attachment of lower plate is different according to specific reactor, as steelmaking converter, then without connecting other parts, and direct tapping；For Con casting ladle, lower skateboard needs to be connected with tundish long nozzle；For continuous casting production, lower skateboard needs to be connected with crystallizer submersed nozzle (SEN), and connecting portion needs to use inert gas seal, prevents connecting portion air-breathing from causing secondary oxidation of steel to be contaminated.The present embodiment lower plate hypomere is steel ladle.
Step 2: after three layers of cast interfaces connection terminate, plate in regulation, the first clear opening and upper and lower plates opening are kept centering, later on cast pattern, molten steel by upper plate mouth, middle plate mouth and lower plate mouth, enters next one reactor with this.It is constant that the whole cast first half stage is always maintained at this cast pattern.
Step 3: when casting process enters rear half stage, according to relation between liquid steel level height and remaining Metal Weight in reactor, the falling head of real-time estimate liquid steel level, when liquid steel level reaches critical vortex height, adjust middle slide plate, in making the second through hole that washer is set relative with upper and lower plates outlet, then proceed by cast, the outlet being provided with washer just can limit the tangential flow velocity of molten steel, plays the purpose stoping vortex motion.In the casting process of latter half, keep this pattern constant.Until liquid level is reduced to extremely low state, switching to be controlled cast pattern by slag monitoring system interlink, once monitor mouth of a river slag, close tapping hole immediately, complete whole casting process, in casting process, in cast interface, plate operation chart is shown in Fig. 3.Using conventional tapping hole form, tapping there will be vortex slag phenomenon mid-term；After using Novel pouring interface, mid-term, whirlpool slag was wholly absent, and Yu Gang amount reduces nearly 43%.
Embodiment two
The device preventing metallurgical reaction cast generation vortex slag is consistent with embodiment one structure, is provided with washer 11 in middle plate 4 second through hole 10, and washer is 90 ° of arrangements of 4 chip, is symmetric, sees Fig. 4；Metallurgical reaction is Con casting ladle.
Certain steel mill 250t ladle, full Baogang water liquid level 4.7m, tapping hole diameter 200mm, on ladle during continuous casting platform cast tundish, owing to refining station time of repose is limited, during normal pouring, automatic Lower proterozoic group system is relied on to control molten steel outlet, general remaining steel amount about 1.2t.Utilizing the above-mentioned device preventing metallurgical reaction cast from producing vortex slag to prevent metallurgical reaction cast from producing vortex slag, arranging 4 chips at middle intralamellar part the second through hole is 90 ° of equally distributed washers, washer length 60mm.Using the cast step of embodiment one, mid-term, whirlpool slag was wholly absent, and Yu Gang amount is down to about 0.7t, Yu Gang amount and is reduced nearly 40%.
Embodiment three
Prevent metallurgical reaction cast from producing the device of vortex slag consistent with embodiment one structure, be that to be wherein provided with washer in the second through hole be that 5 chips are 72 ° and are uniformly distributed, washer length 30mm.Certain steel mill 45t tundish, tapping hole diameter 120mm；Utilizing the device preventing metallurgical reaction cast from producing vortex slag of the present utility model to prevent metallurgical reaction cast from producing vortex slag, use the cast step of embodiment one, mid-term, whirlpool slag was wholly absent, and Yu Gang amount reduces nearly 41%.
Embodiment four
Prevent metallurgical reaction cast from producing the device of vortex slag consistent with embodiment one structure, be that to be wherein provided with washer in the second through hole be that 6 chips are 60 ° and are uniformly distributed, washer length 50mm.Certain steel mill 300t steelmaking converter, tapping hole diameter 160mm, for steel ladle；Utilizing the device preventing metallurgical reaction cast from producing vortex slag of the present utility model to prevent metallurgical reaction cast from producing vortex slag, use the cast step of embodiment one, mid-term, whirlpool slag was wholly absent, and Yu Gang amount reduces nearly 42%.
Claims (10)
1. one kind prevents the device that metallurgical cast produces vortex slag, it is characterised in that the device preventing metallurgical reaction cast from producing vortex slag described in: includes metallurgical reaction and cast interface；Described cast interface includes upper plate, middle plate and lower plate；Described upper plate is provided with upper plate through hole；Described lower plate is provided with lower plate through hole；Described middle plate is provided with the first through hole and the second through hole；It is provided with washer in described second through hole；Described upper plate is connected with the outlet of metallurgical reaction by middle siphunculus；Described lower plate is connected with upper plate；Described upper plate lower surface is provided with upper groove；Described lower plate upper surface is provided with low groove；Described middle plate is positioned at the space of upper groove and low groove composition；Described middle plate can slide relative to upper plate and lower plate.
Prevent metallurgical cast from producing the device of vortex slag the most according to claim 1, it is characterised in that: described metallurgical reaction is steelmaking converter, Con casting ladle or tundish.
Prevent metallurgical cast from producing the device of vortex slag the most according to claim 1, it is characterised in that: described upper plate through hole, the first through hole, the second through hole are consistent with the shape size of lower plate through hole。
Prevent metallurgical cast from producing the device of vortex slag the most according to claim 1, it is characterised in that: all through holes are all manhole.
Prevent metallurgical cast from producing the device of vortex slag the most according to claim 1, it is characterised in that: described lower plate by screw, bolt, welding or bonding by the way of be connected with upper plate；The space of upper groove and low groove composition filled by middle plate.
Prevent metallurgical cast from producing the device of vortex slag the most according to claim 1, it is characterised in that: the washer in described middle plate the second through hole is at least 2.
Prevent metallurgical cast from producing the device of vortex slag the most according to claim 6, it is characterised in that: described washer is 3～6；All washers are symmetric。
Prevent metallurgical cast from producing the device of vortex slag the most according to claim 1, it is characterised in that: described upper plate is formed around upper plate lock ring；Described middle plate is formed around middle plate lock ring；Described lower plate is formed around lower plate lock ring.
Prevent metallurgical cast from producing the device of vortex slag the most according to claim 1, it is characterised in that: 0.3～1 times of described washer a length of metallurgical reaction outlet inner radius.
Prevent metallurgical cast from producing the device of vortex slag the most according to claim 1, it is characterised in that: described upper plate through hole keeps centering with lower plate through hole.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201620091435.6U CN205519625U (en) | 2016-01-29 | 2016-01-29 | Device for preventing metallurgical pouring produces swirl and rolls up sediment |
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| Application Number | Priority Date | Filing Date | Title |
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| CN201620091435.6U CN205519625U (en) | 2016-01-29 | 2016-01-29 | Device for preventing metallurgical pouring produces swirl and rolls up sediment |
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| CN205519625U true CN205519625U (en) | 2016-08-31 |
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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN115156489A (en) * | 2022-07-26 | 2022-10-11 | 江苏省沙钢钢铁研究院有限公司 | Pouring device and bottom pouring type pouring system with same |
-
2016
- 2016-01-29 CN CN201620091435.6U patent/CN205519625U/en not_active Expired - Fee Related
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN115156489A (en) * | 2022-07-26 | 2022-10-11 | 江苏省沙钢钢铁研究院有限公司 | Pouring device and bottom pouring type pouring system with same |
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