CN105598430A - Method for preventing slag from entrapment by vortex generated by metallurgical pouring and device for method - Google Patents

Method for preventing slag from entrapment by vortex generated by metallurgical pouring and device for method Download PDF

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Publication number
CN105598430A
CN105598430A CN201610062729.0A CN201610062729A CN105598430A CN 105598430 A CN105598430 A CN 105598430A CN 201610062729 A CN201610062729 A CN 201610062729A CN 105598430 A CN105598430 A CN 105598430A
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plate
hole
cast
metallurgical reaction
vortex
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CN105598430B (en
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屈天鹏
王德永
郝月莹
郭瑞琪
王慧华
田俊
苏丽娟
袁子凯
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Suzhou University
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Suzhou University
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    • BPERFORMING OPERATIONS; TRANSPORTING
    • B22CASTING; POWDER METALLURGY
    • B22DCASTING OF METALS; CASTING OF OTHER SUBSTANCES BY THE SAME PROCESSES OR DEVICES
    • B22D43/00Mechanical cleaning, e.g. skimming of molten metals
    • B22D43/001Retaining slag during pouring molten metal
    • B22D43/002Retaining slag during pouring molten metal by using floating means

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  • Mechanical Engineering (AREA)
  • Carbon Steel Or Casting Steel Manufacturing (AREA)

Abstract

The invention discloses a method for preventing slag from entrapment by vortex generated by metallurgical pouring and a device for the method. The device comprises a metallurgical reactor and a pouring connector, wherein the pouring connector comprises an upper plate, a middle plate and a lower plate; through holes are formed in the upper and lower plates; two through holes are formed in the middle plate, and one through hole is internally provided with a separation blade; an upper groove is formed in the lower surface of the upper plate and a lower groove is formed in the upper surface of the lower plate; the middle plate is located in a space composed of the upper groove and the lower groove; the middle plate can slide relative to the upper plate and the lower plate. Being different from an existing vortex flow control mode, the method is used for eliminating a tangential movement speed of vortex flowing of molten steel in a tapping process of the metallurgical reactor through a manner of changing an inner structural form of a tapping hole, so that the critical height of generating the vortex can be remarkably lowered, the upper-layer steel slag can be prevented from being sucked into a downstream reactor and the slag tapping amount is controlled.

Description

Prevent that metallurgical cast from producing the method for vortex slag and the device for the method
Technical field
The invention belongs to metallurgical placingJi Shu field, be specifically related to a kind of method of metallurgical reaction casting process generation vortex slag and device for the method for preventing.
Background technology
Along with the development of high-quality steel and property steel, steel-making, refining and cast link steel quality are proposed to stricter requirement. In metallurgical reaction (as converter, ladle and tundish) casting process due to the impact of molten steel initial flow state; can there is vortex motion phenomenon in the cast middle and later periods; in serious situation, can produce through Air-core Vortex; the slag blanket on molten steel upper strata is entrainmented and enters downstream reactor; broken slag blanket particle can cause size difference; some meeting floatings are removed; some fine particle is trapped in molten steel because being difficult to remove; form the non-metallic inclusion in steel, finally can affect the serviceability of steel. For this reason, in actual production, in order to prevent whirlpool slag, tend to close immediately tapping hole in the time that lower slag detection system has detected that slag is involved in, the molten steel that makes like this part not pour into a mould becomes steel scrap and returns to smelting iron and steel flow process, has reduced the recovery rate of molten steel.
In order to prevent whirlpool slag phenomenon, iron and steel enterprise has developed multiple vortex inhibitor both at home and abroad. Within 1984, US Patent No. 4601415 has been introduced a kind of pyramid molten steel eddy current TVS, this TVS is many prismatics cone that a kind of proportion is made with refractory material between molten steel and slag, cone center has a steel ball that cone fixed point is kept down, follow molten steel face to decline, cone can be blocked the mouth of a river gradually, stop generation and the pushing off the slag of vortex motion, its weak point is that the proportion of cone and center are difficult for accurately holding, and this TVS processing and forming industry more complicated. Zhong Ye company has proposed a circular cylindrical cavity in existing slide gate nozzle system-based, outputs symmetrically 4 outlets on cavity facade, impels molten steel to change bottom horizontal flow sheet into behind bottom, can suppress accordingly the vortex motion in casting process; Made by refractory material owing to stopping cyclone, washed away by molten steel, be difficult to its service life identical with the ladle liner life-span, need additional maintenance, cost is very large, and can produce secondary pollution in the process of washing away, and particularly can produce certain whirlpool that confluxes latter stage in cast, cannot industrial applications. In addition, also have researcher to propose mouth of a river air blowing and only revolve method, the inert gas that dependence reactor bottom is blown into destroys the tangential motion speed of vortex molten steel, can play the effect that stops vortex motion, in use procedure, need rationally to control bottom blowing tolerance, prevent that the excessive liquid level causing of tolerance is exposed, easily cause secondary oxidation of steel.
In general, in prior art, cost is high, installation position is fixed owing to existing for slide gate nozzle system, pour into a mould can produce conflux vortex latter stage, continuous pouring meeting causes the defects such as secondary oxidation pollutant rising, other only revolve the passive measure that method exists equally excessive remaining steel, reduces metal yield; Therefore a kind of new simplicity of design of necessary research and development, the easy device of realizing, can effectively stop vortex, and the long service life of this resistance cyclone, has stronger actual application value.
Summary of the invention
The invention provides a kind of simple and easy to do metallurgical reaction cast that prevents and produce method and the device of vortex slag, the method can effectively stop the vortex slag phenomenon in metallurgical reaction casting process, and for the device long service life of the method, can be applicable to the casting process of metallurgical process ferrous materials and other metal material, be applicable to the transmitting procedure of all types of fluids, the vortex control mode of proposition can be used for reference and use for other industry.
The object of the invention is to be achieved through the following technical solutions:
Prevent that metallurgical reaction cast from producing a device for vortex slag, comprise metallurgical reaction and cast interface; Described cast interface comprises 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; In described the second through hole, be provided with washer; 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 with respect to upper plate and lower plate; The material of described washer is consistent with the material of middle plate, is all refractory material; Described washer and middle plate adopt that one is compressing to be prepared.
The present invention is used for stoping metallurgical reaction cast to produce vortex slag latter stage, and metallurgical reaction can be steelmaking converter, continuous casting ladle, tundish etc.; Middle plate slide through control system control, for the purpose of the present invention, middle plate does not limit with the control mode that upper plate and lower plate are slided relatively, can adopt existing driver to connect and control, and for small-sized ladle, also can adopt plate slip in the control of manual twitch mode.
Cast interface of the present invention is three-decker, is divided into three blocks of upper, middle and lower plate according to virtual condition, controls metal liquid flow, is core parts of the present invention; Upper plate is connected such as watering steel container outlet with metallurgical reaction by middle siphunculus, adopts argon gas-sealed simultaneously, and upper plate through hole and lower plate through hole keep centering; Through hole is preferably manhole; Middle plate is slide plate, has two through holes, and one is typical circular clear opening, and another is the circular clear opening that is 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 reception reactor from lower plate through hole, carry out lower order work. Further preferred, upper plate through hole, the first through hole, the second through hole are consistent with the shape size of lower plate through hole, are conducive to metal liquid mobile smoothly, also can avoid leaked liquid.
In technique scheme, the material of middle plate and washer is preferably MgO or MgO-C, not only has good machine-shaping property, and can bear the high temperature of molten metal; Adopt the middle plate of integral forming process preparation with washer, effectively molten metal is scattered on middle plate the impulsive force of washer, greatly increased the shock-resistant ability of washer; Can will after the material MgO of plate and washer in preparation or MgO-C raw material blending, insert in mould, after compacting, through ladder sintering, heat treatment, cooling rear die sinking, obtains the middle plate with washer.
In technique scheme, lower plate can be arranged on upper plate below by screw or bolt, also can weld or be bonded in upper plate below, thereby upper groove and low groove form a space, and middle plate is positioned at this space, fills this space, upper and lower plates connects, and in the middle of keeping, slide plate is in sealing statePrevent that metal liquid from leaking; For easy to process, preferably groove is regular shape, square, circle or polygon etc.; For the slip of plate in accurately controlling, upper groove does not connect upper plate lower surface, and low groove does not connect lower plate upper surface, and middle plate can slide on one side of groove, and can not pass 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 each catch keeps equating; Further preferably, washer is 120 ° of arrangements of 3 chip, can be also that 90 ° of 4 chips are arranged symmetrically with mode, 72 ° of arrangements of 5 chip and 60 ° of arrangements of 6 chips etc.; Catch length is 0.3~1 times of metallurgical reaction outlet inner radius, preferably 0.5 times; Catch thickness equates with middle plate thickness, and washer width does not limit, and selects to limit voluntarily according to metalline and flow; The length that washer length finger stop sheet stretches to the second through hole axis by the second through hole inner side; The second through hole of different structure size prevents that the effect of whirlpool slag is all better than through type opening.
In preferred technical scheme, for guaranteeing smooth and easy slip between slide plate, middle plate surface scribbles lubriation material, and such as lead powder or graphite powder, lubriation material can adopt the curing mode of coating to prepare; In middle plate upper and lower surface, lead powder layer or graphite bisque are set simultaneously, are conducive to the slip of middle plate with respect to upper plate, lower plate.
In preferred technical scheme, in order to prevent plate cracking and to avoid molten metal to enter crack, upper plate surrounding is provided with upper plate lock ring, and middle plate surrounding is provided with middle plate lock ring, and lower plate surrounding is provided with lower plate lock ring; Lock ring is metal material, and such as steel band, metal causes soft heat-resisting, has stronger thermal diffusivity, prevents the damage of thermal stress to sheet material; Lock ring width is selected according to plate thickness, and thickness is generally 1.5~2.5mm; All plates all, with ferrule constraint, are effectively avoided plate cracking, prevent that molten metal from infiltrating, and increases the service life of interface arrangement greatly.
Utilize said apparatus can effectively prevent that metallurgical reaction cast from producing vortex slag, concrete grammar is that, 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; Then open cast; In the time that 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 finish; Thereby effectively prevent that metallurgical reaction cast from producing vortex slag.
The present invention can be applied to steelmaking converter tapping middle and later periods, continuous casting steel ladle pouring latter stage and the basket pouring later stage etc.; In early stage and the mid-term of casting process, by Board position in controlling, keep centering to carry out normal pouring straight-through the typical circular of middle plate outlet and upper and lower two-layer slide plate outlet, when casting process enters the later stage, system monitoring is when being about to reach between the critical liquid that forms vortex height, and Board position in adjustment, switches to its outlet the second through hole that washer is set, proceed later stage cast, in normal casting process, can regulate the state of non-full centering to reduce steel-passing amount. After adopting this kind of control mode, can extend on the one hand the life-span that exports washer, importantly can control whirlpool slag phenomenon in the cast later stage.
In the present invention, the outlet of the upper plate of the cast interface of novel three layers of skateboard and metallurgical reaction is connected, and adopts inert gas (as the argon gas) position that is tightly connected; Lower plate and follow-up reception reactor type of attachment receive reactor and different according to concrete, as for steelmaking converter, without connecting other parts, directly tap; For continuous casting ladle, lower plate need to be connected with tundish long nozzle; For continuous casting tundish, lower plate need to be connected with crystallizer submersed nozzle (SEN), and connecting portion need to adopt inert gas seal, prevents from that connecting portion is air-breathing cause secondary oxidation of steel and polluted.
After slide plate connection finishes, regulate middle level slide plate, prototype clear opening and upper lower skateboard opening are kept to centering, open and water injection-molded subsequently, molten steel by upper slide mouth, middle slide plate mouth and lower skateboard mouth, enters next reactor with this. It is constant that the whole cast first half stage keeps this to water injection-molded always.
Cast interface of the present invention is poured into second container for first container, and first container is steelmaking converter, continuous casting ladle or tundish; Second corresponding container is respectively steel ladle, continuous casting tundish and continuous cast mold. When casting process enters rear half stage, according to the relation between liquid steel level height in reactor and last Metal Weight, the falling head of real-time estimate liquid steel level, in the time that liquid steel level reaches critical vortex height, adjust middle level slide plate, make to arrange the outlet of washer relative with upper lower skateboard outlet in, then proceed to pour into a mould, just can limit the tangential flow velocity of molten steel with the outlet of washer, play the object that stops vortex motion. In the casting process of latter half, keep this pattern constant. Until liquid level is reduced to extremely low state, switch to by lower slag monitoring system interlock and control and water injection-molded, once monitor slag under the mouth of a river, close immediately tapping hole, complete whole casting process.
Beneficial effect of the present invention:
(1) the present invention discloses a kind of device that can effectively prevent metallurgical reaction cast generation vortex slag first, at the middle level slide plate of cast interface, a tapping hole with washer is additionally set, can realizes by the washer arranging the effect that the cast later stage stops vortex motion; The inventive method is simple, and effect is outstanding. Technology is revolved in the resistance that adopts the present invention to propose, can greatly reduce and even eliminate the metallurgical reaction vortex slag phenomenon in cast later stage, significantly reduce the reactor Yu Gangliang in cast later stage, compared with prior art can reduce by 40%, improve molten steel recovery rate, for lower procedure provides clean high-quality molten steel, the internal soundness of steady production strand and stocking.
(2) the present invention, by scribbling lubriation material on middle plate surface, such as lead powder or graphite powder, guarantees smooth and easy slip between slide plate, is conducive to the slip of middle plate with respect to upper plate, lower plate; Be provided with and there is excellent toughness and stable on heating metal lock ring in plate surrounding, effectively avoid plate cracking, prevent that molten metal from infiltrating, and increases the service life of interface arrangement greatly; Utilize MgO or MgO-C as middle plate and washer material, by one-body molded, be conducive to the raising of the shock-resistant ability of washer, increase washer service life.
(3) the present invention, by multi-form washer structure being set in cast interface inside, utilizes washer to stop the tangential flow velocity of vorticla motion, and the swirl flow phenomenon in latter stage is poured into a mould in delay and even elimination; There is significant effect for the vortex slag difficult problem solving in existing metallurgical reaction casting process; Can reduce the lower quantity of slag by minimally, be conducive to the raising of the cleanliness factor of molten steel, for STEELMAKING PRODUCTION provides high-quality molten steel, meet the harsh demand of follow-up producing process to steel quality, particularly, for the production of high-quality steel, excellent special steel, the present invention has higher industrial application value.
Brief description of the drawings
Fig. 1 prevents that metallurgical reaction cast from producing the structural representation of the device of vortex slag;
Fig. 2 is upper plate, middle plate and the lower plate structural representation that embodiment mono-pours into a mould interface;
Fig. 3 is that embodiment mono-pours into a mould interface operation process schematic diagram;
Fig. 4 is the middle plate structure schematic diagram that embodiment bis-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 8, the first through hole 9, the 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, preferred case study on implementation of the present invention is described in detail. Should be appreciated that preferred case study on implementation is only for the present invention is described, instead of in order to limit the scope of the invention.
Embodiment mono-
Referring to accompanying drawing 1-2, a kind of device that prevents metallurgical reaction cast generation vortex slag, comprises metallurgical reaction 1, cast interface 2; Cast interface comprises 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 with respect to upper plate and lower plate; Adopt existing pull bar can control in plate slide, pull bar can be connected with cylinder or driver etc. Upper plate 3 surroundings are provided with upper plate lock ring 12, and middle plate 4 surroundings are provided with middle plate lock ring 13, and lower plate 5 surroundings are provided with lower plate lock ring 14; Lock ring is steel band, and width and thickness of slab are suitable, and lock ring thickness is 2mm, effectively avoids plate cracking, prevents that molten metal from infiltrating, and increases the service life of interface arrangement greatly. 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 and lower plate through hole keep centering; Middle plate 4 is provided with the first through hole 9 and the second through hole 10; In the second through hole, be provided with washer 11, washer is 120 ° of arrangements of 3 chip, is symmetric; Washer and middle plate are one-body molded, and material is MgO; 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 converter, tapping hole diameter 180mm, utilize the above-mentioned device that prevents metallurgical reaction cast generation vortex slag to prevent that metallurgical reaction cast from producing vortex slag, adopt these three layers cast interface shape, middle plate the second via design becomes three-chip type washer structure, be 120 ° and be uniformly distributed, washer length is 45mm.
Step 1: upper slides and the converter outlet of three layers of cast interface is connected, and employing inert gas (argon gas) position that is tightly connected. The type of attachment of lower plate is different according to specific reactor, as for steelmaking converter, and without connecting other parts, directly tapping; For continuous casting ladle, lower skateboard need to be connected with tundish long nozzle; For continuous casting tundish, lower skateboard need to be connected with crystallizer submersed nozzle (SEN), and connecting portion need to adopt inert gas seal, prevents from that connecting portion is air-breathing cause secondary oxidation of steel and polluted. The present embodiment lower plate hypomere is steel ladle.
Step 2: after the connection of three layers of cast interface finishes, plate in adjusting, keeps centering by the first clear opening and upper and lower plates opening, opens and waters injection-molded subsequently, and molten steel by upper plate mouth, middle plate mouth and lower plate mouth, enters next reactor with this. It is constant that the whole cast first half stage keeps this to water injection-molded always.
Step 3: when casting process enters rear half stage, according to the relation between liquid steel level height in reactor and last Metal Weight, the falling head of real-time estimate liquid steel level, in the time that liquid steel level reaches critical vortex height, adjust middle slide plate, make to arrange the second through hole of washer relative with upper and lower plates outlet in, then proceed to pour into a mould, the outlet that is provided with washer just can limit the tangential flow velocity of molten steel, plays the object that stops vortex motion. In the casting process of latter half, keep this pattern constant. Until liquid level is reduced to extremely low state, switch to by lower slag monitoring system interlock and control and water injection-molded, once monitor slag under the mouth of a river, close immediately tapping hole, complete whole casting process, in casting process, in cast interface, plate operation chart is shown in Fig. 3. Adopt conventional tapping hole form, tap and there will be vortex slag phenomenon mid-term; Use after Novel pouring interface, mid-term, whirlpool slag disappeared completely, and Yu Gangliang reduces nearly 43%.
Embodiment bis-
Prevent that metallurgical reaction cast from producing the device of vortex slag consistent with embodiment mono-structure, be just wherein provided with the washer 11 of 90 ° of arrangements of 4 chips in middle plate 4 second through holes 10, be symmetric, referring to Fig. 4; Washer and middle plate are one-body molded, and material is MgO-C; Metallurgical reaction is continuous casting ladle.
Certain steel mill 250t continuous casting ladle, the full water liquid level 4.7m of Baogang, tapping hole diameter 200mm, on ladle, continuous casting platform is poured into a mould in continuous casting tundish process, because refining station time of repose is limited, in normal pouring process, rely on automatically lower slag detection system control molten steel outlet, the general remaining about 1.2t of steel amount. Utilize the above-mentioned device that prevents metallurgical reaction cast generation vortex slag to prevent that metallurgical reaction cast from producing vortex slag, arranges 4 chips at middle intralamellar part the second through hole and be 90 ° of equally distributed washers, washer length 60mm. The cast step that adopts embodiment mono-, mid-term, whirlpool slag disappeared completely, and Yu Gangliang is down to 0.7t left and right, and Yu Gangliang reduces nearly 40%.
Embodiment tri-
The device that prevents metallurgical reaction cast generation vortex slag is consistent with embodiment mono-structure, just wherein being provided with washer in the second through hole and being 5 chips is 72 ° and is uniformly distributed, washer length 35mm, middle plate is all provided with lead powder layer with respect to the surface of upper plate, lower plate, is beneficial to the slip of plate in increase. Certain steel mill 50t tundish, tapping hole diameter 110mm, for continuous cast mold; Utilize the device that prevents metallurgical reaction cast generation vortex slag of the present invention to prevent that metallurgical reaction cast from producing vortex slag, adopt the cast step of embodiment mono-, mid-term, whirlpool slag disappeared completely, and Yu Gangliang reduces nearly 42%.
Embodiment tetra-
Preventing that metallurgical reaction cast from producing the device of vortex slag consistent with embodiment mono-structure, is 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 150mm; Utilize the device that prevents metallurgical reaction cast generation vortex slag of the present invention to prevent that metallurgical reaction cast from producing vortex slag, adopt the cast step of embodiment mono-, mid-term, whirlpool slag disappeared completely, and Yu Gangliang reduces nearly 41%.

Claims (10)

1. prevent that metallurgical reaction cast from producing a device for vortex slag, is characterized in that: described in prevent that the device that metallurgical reaction cast produces vortex slag from comprising metallurgical reaction and cast interface; Described cast interface comprises 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; In described the second through hole, be provided with washer; 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 with respect to upper plate and lower plate; The material of described washer is consistent with the material of middle plate, is all refractory material; Described washer and middle plate adopt that one is compressing to be prepared.
2. prevent according to claim 1 that metallurgical reaction cast from producing the device of vortex slag, is characterized in that: described metallurgical reaction is steelmaking converter, continuous casting ladle or tundish; Described upper plate through hole and lower plate through hole keep centering.
3. prevent according to claim 1 that metallurgical reaction cast from producing the device of vortex slag, is characterized 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
4. prevent according to claim 1 that metallurgical reaction cast from producing the device of vortex slag, is characterized in that: described lower plate is connected with upper plate by screw, bolt, welding or bonding mode; Middle plate is filled the space of upper groove and low groove composition.
5. prevent according to claim 1 that metallurgical reaction cast from producing the device of vortex slag, is characterized in that: the material of washer and middle plate is MgO or MgO-C.
6. prevent according to claim 1 that metallurgical reaction cast from producing the device of vortex slag, is characterized in that: the washer in described middle plate the second through hole is at least 2; All washers are symmetric; Described catch length is 0.3~1 times of metallurgical reaction outlet inner radius.
7. prevent according to claim 1 that metallurgical reaction cast from producing the device of vortex slag, is characterized in that: described middle plate upper surface and lower surface are provided with lubriation material layer.
8. prevent according to claim 7 that metallurgical reaction cast from producing the device of vortex slag, is characterized in that: described lubriation material is lead powder or graphite powder.
9. prevent according to claim 1 that metallurgical reaction cast from producing the device of vortex slag, is characterized in that: described upper plate surrounding is provided with upper plate lock ring; Described middle plate surrounding is provided with middle plate lock ring; Described lower plate surrounding is provided with lower plate lock ring; Described lock ring is metal material.
10. utilize and prevent that the device that metallurgical reaction cast produces vortex slag from preventing that metallurgical reaction cast from producing the method for vortex slag described in claim 1, it is characterized in that, comprise the following steps: 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; Then open cast; In the time that 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 finish; Thereby effectively prevent that metallurgical reaction cast from producing vortex slag.
CN201610062729.0A 2016-01-29 2016-01-29 Prevent metallurgical cast from generating the method and device for the method for vortex slag Active CN105598430B (en)

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Publication number Priority date Publication date Assignee Title
CN112609042A (en) * 2020-12-09 2021-04-06 苏州大学 Method for modifying slag in final casting stage of ladle with cover

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WO2022122050A1 (en) * 2020-12-09 2022-06-16 苏州大学 Method for slag modification during end period of casting in steel ladle having cover

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