502 results about "Tundish" patented technology

The invention discloses a novel quick-change mechanism with a flow control function for a tundish. The novel quick-change mechanism comprises a mounting part, a sliding part, a pressing part, a first driving part and a second driving part. And the functions of the stopper rod opening and closing device are integrated on the tundish quick-change nozzle device, so that the investment, the installation site, the maintenance cost, the spare part site and the cost of a set of equipment are saved. The two sets of equipment are combined into a whole, so that the number of operators in a steel mill is reduced, and meanwhile, preparation is made in advance for the subsequent steel mill if intelligent and automatic control over steel-making continuous casting is adopted, and the positive effect is achieved.

The invention discloses a continuous casting tundish mixed steel section dynamic simulation method and system, and aims to solve the problems of physical distortion and dynamic response lag of an existing mixed steel model. The method comprises the steps that S1, the actual measurement size of the tundish is obtained, and the tundish is divided into multiple areas; s2, establishing a nonlinear volume mapping model representing the total volume of molten steel at different liquid levels and the volume ratio of each region; s3, dynamically calculating the weight of each region, the molten steel exchange weight between the regions and the components of new and old molten steel in each time step length; and S4, comparing the molten steel components with target requirements in real time, and determining the position of the mixed steel section. According to the method, the irregular structure and the technological parameter fluctuation of the tundish can be accurately reflected, and the positioning accuracy of the mixed steel section is improved.

The invention discloses a method for improving castability of aluminum-containing steel in a continuous casting process, which comprises the following steps of: S1, controlling components of molten steel, and accurately controlling the content of acid-soluble aluminum in molten steel of a continuous casting ladle to be 0.020-0.060% according to mass percent; s2, calcium treatment is conducted on the molten steel, and the calcium-aluminum ratio is controlled to range from 0.10 to 0.15; s3, continuous casting process control is conducted, specifically, the superheat degree of tundish molten steel is stably controlled to range from 15 DEG C to 30 DEG C, meanwhile, constant pulling speed operation is adopted, and the pulling speed fluctuation range is controlled within + / -0.1 m / min; and S4, the content of SiO in the casting powder is reduced to be smaller than or equal to 20%, and meanwhile, the alkalinity R of the casting powder is 1.5-2.0. The continuous casting process is ensured to be smooth, nozzle nodulation and casting blank surface defects are effectively prevented, and the production efficiency and the product quality are remarkably improved.

The invention relates to the technical field of ferrous metallurgy casting, in particular to a drainage sand removing and recycling method and device. Comprising a mechanical arm, a lifting rotation controller, a controller arm, a sand suction cylinder, a sand conveying pipeline, a sand collecting tank and an injection pump. The lifting and rotating controller is fixedly mounted on the mechanical arm; the controller arm is connected with the lifting and rotating controller, and the lifting and rotating of the controller arm are controlled by the lifting and rotating controller; the sand suction cylinder is connected with the controller arm, the sand suction cylinder is of a U-shaped structure, and one end of the sand suction cylinder is a horn mouth used for sucking drainage sand; one end of the sand conveying pipeline is positioned above the tundish cover sprue gate, and the end part of the sand conveying pipeline is bent downwards to be connected with the other end of the sand suction cylinder; the other end of the sand conveying pipeline is connected with the sand collecting tank; the sand collecting tank is connected with an injection pump pipeline, and the injection pump provides suction power. The ladle filler sand, harmful gas in gaps of the ladle filler sand and a long nozzle and a small part of molten steel in contact with the ladle filler sand in a steel ladle can be discharged out of tundish molten steel and recycled.

This invention discloses an online method for detecting and identifying cracks in continuously cast slabs, comprising the following steps: real-time collection of instrument detection information of the slab in the ladle, tundish, crystallizer, primary cooling, secondary cooling and air cooling zones at m time points to construct a dataset of dimension m×n, where n is the number of instrument detection information collected at each time point; for each time point, performing: (1) based on the dataset, using an anomaly detection algorithm to obtain the anomaly value I of each time point. i (2) Obtain the anomaly probability P of the slab at that time point: P = p / m, where p is the outlier value I. i (3) Collect steel grade information in real time and obtain the abnormal threshold S of the steel grade based on the steel grade information; (4) Compare the abnormal probability P of the steel grade with the abnormal threshold S. If P≥S, output the judgment that the production abnormality probability of the steel grade will lead to slab crack defects; otherwise, output the judgment that the slab is normal.

The utility model relates to the technical field of tundish protection plate structures, and discloses a continuous casting tundish special-shaped protection plate which comprises a first protection plate, a second protection plate and a tundish, vertical plates are fixedly connected to the middle positions of the left end and the right end of the first protection plate, and a fixing shaft penetrates through the middle position, close to the upper side, between the vertical plates. A rotating cylinder is rotatably installed at the position, corresponding to the middle of the first protection plate, of the outer side of the fixing shaft, three sets of evenly-distributed buffer plates are fixedly connected to the rotating cylinder, two sets of second protection plates are symmetrically installed at the positions, close to the left side and the right side of the first protection plate, of the second protection plates, and sliding grooves are formed in the middle positions of the second protection plates; and the outer sides of the fixed shafts are fixedly sleeved with limiting pieces at the sliding grooves. According to the device, the impact effect of molten steel is converted into rotating power of the rotary drum through the rotary drum and the buffer plate, direct scouring erosion of the molten steel to a tundish permanent layer and the protective plates is greatly relieved, meanwhile, the first liftable protective plate always floats on the surface of the molten steel, and the liquid level of the molten steel is stabilized.

The application discloses a stopper rod for inhibiting confluence vortex and a method thereof, and belongs to the technical field of water gap flow control of continuous casting tundish in metallurgy technology. The stopper rod comprises a stopper rod shell, a stopper rod core is embedded in the stopper rod shell, a magnetic field generating device is arranged on the outer circumferential wall of the stopper rod core, and the magnetic field generating device is used for exciting a magnetic field directly above the water gap. The magnetic field generating device is an electromagnetic coil or a rotating magnetic field stirrer. The application can effectively inhibit the generation of confluence vortex at the end of pouring by adding an electromagnetic field to make the molten steel generate induced current. Meanwhile, the magnetic field excited by the application is formed directly above the water gap and has the maximum strength at the vortex forming position, so that the inhibition effect of the magnetic field on the confluence vortex is more direct, the inhibition effect is obvious, and energy waste is avoided.

To provide a method for continuously casting a steel with which the natural opening ratio of a long nozzle can be improved by restraining the pressure rise in the long nozzle at the time of changing a ladle.SOLUTION: A molten steel flow rate control device (5) for controlling a flow rate of molten steel poured from a ladle (1) into a tundish (2) is closed, and a tip portion of a long nozzle (9) for pouring the molten steel from the ladle (1) into the tundish (2) is immersed in the molten steel in the tundish (2) with a filler (4) filled in a molten steel outflow hole (3) of the ladle (1).SELECTED DRAWING: Figure 4

This invention relates to the field of refractory materials technology, specifically to an anti-slag-adhesion environmentally friendly refractory spray coating adapted to the contact surface of an tundish cover and its preparation method. The dry powder of this spray coating mainly consists of corundum aggregate, modified spinel powder, composite binder, and modified anti-slag additives. Through precise gradation and spatial decoupling of components, a strong and tough skeleton is constructed. During water addition, rheological changes, and baking, the anti-slag additives spontaneously target and migrate outwards, reconstructing a superhydrophobic slag-repellent armor on the slag-facing surface. Combined with the internal spinel-based slag-locking and deformation buffer defense lines, a gradient synergistic defense is achieved. This invention is completely chromium-free and environmentally friendly, completely eliminating the pain point of high-temperature slag adhesion and spalling, extending its service life to 40 heats, and is suitable for large-scale adaptation to special steel continuous casting conditions.

The invention discloses a method for inhibiting the generation of TiN inclusions in a tundish and a high-nitrogen-capacity tundish covering agent.The method comprises the steps that before the tundish is cast, the high-nitrogen-capacity tundish covering agent is evenly added into the tundish, and a water gap outlet is completely covered with the high-nitrogen-capacity tundish covering agent. The adopted covering agent has high nitrogen capacity, nitrogen in air can be effectively prevented from spreading into molten steel, nitrogen increase of the molten steel in the pouring process is prevented, and therefore the generation probability of TiN inclusions is reduced, good economic benefits are achieved, and good market application and popularization prospects are achieved.

The invention discloses a method for controlling the internal quality of a spring steel casting blank. In the continuous casting process, the pulling speed is controlled to be 0.45-0.55 m / min, the specific water flow is 0.09-0.13 / kg, the superheat degree of a tundish is controlled to be 18-25 DEG C through induction heating of the tundish, the total rolling reduction of a pressing device is controlled to be 25-35 mm, and 2-6 pulling-straightening rollers are put. According to the method, the tundish is heated through induction, and the internal quality of the spring steel is improved through combination of crystallizer electromagnetic stirring and tail end electromagnetic stirring processes and a light and heavy pressing process; according to the spring steel casting blank manufactured through the method, the center porosity is greatly improved, the center porosity is smaller than or equal to 0.5 level, the center shrinkage cavity is smaller than or equal to 0.5 level, the center crack is smaller than or equal to 0.5 level, and the number of inclusions is smaller than or equal to 218 / 100 mm < 2 > (larger than or equal to 6 micrometers).

The invention discloses a double-flow slab tundish with a double-electrode plasma heating function. The double-flow slab tundish comprises a tundish body and a tundish cover arranged at the top of the tundish body, and a turbulence controller is arranged at the bottom of the tundish body; a barrage structure is arranged at one end of the interior of the tundish, and a uniflow control wall structure is arranged at the other end of the interior of the tundish. And a dual-electrode plasma heating device is arranged on the ladle cover. Single-flow pouring of the double-flow tundish is achieved, the size of a low-temperature area and the size of a dead area are reduced, slag entrapment is prevented, the temperature in the tundish is uniform, and the plasma heating efficiency is improved. And meanwhile, the tundish casting allowance is reduced.

The application discloses a preparation method of a protective coating of a tundish lining for clean steel smelting, and belongs to the field of refractory material applications. The protective layer is prepared from slurry with suitable viscosity of different particle sizes of magnesia-yttria stabilized zirconia, a sintering agent, a stabilizer and a binding agent, is sprayed or smeared on the surface of a tundish working lining to form a thin layer with a thickness of 2-5 mm, and can form a protective layer with suitable performance after on-line baking. The protective layer prepared in the way can effectively isolate the direct contact between the working lining dry charge in initial use and molten steel, avoids the formation of inclusions in the molten steel caused by the peeling of the protective layer, reduces the hydrogen and carbon increasing effect of the resin dry charge on the molten steel, improves the cleanliness of the molten steel, improves the non-wetting performance of the refractory material against the molten steel, and is not easy to form inclusions in the molten steel, thereby guaranteeing the quality of the clean steel.

The present application relates to continuous casting pouring technical field, especially to a kind of titanium-containing alloy steel liquid's continuous casting pouring device and method, including ladle and tundish and workstation, workstation is rotatably installed with load plate, two ladle positions for placing ladle are opened in load plate, the bottom of workstation is fixedly connected with the induction coil long shroud that is communicated with ladle, tundish is fixedly connected with breather bushing, breather bushing is inserted with breather stopper, tundish outside is equipped with tank for guiding argon, the bottom of tundish is provided with induction coil submerged entry nozzle, for guiding molten steel into continuous casting crystallizer, tundish bottom is provided with slow flow mechanism for slowing down the impact force of molten steel falling, the argon is injected in the breather stopper, the titanium-containing steel with poor fluidity is not dead in tundish nozzle, after molten steel flows into tundish nozzle, induction coil submerged entry nozzle also generates induction magnetic field, so that molten steel does not solidify before entering crystallizer.

The invention belongs to the technical field of steel and iron smelting and material processing, and particularly discloses a peritectic steel casting blank surface longitudinal crack control method which specifically comprises the steps that firstly, the physical performance of casting powder is optimized, the crystallization temperature of the casting powder is controlled in a segmented mode according to the carbon content of peritectic steel, and the content of lithium oxide in the casting powder is controlled; secondly, adjusting the control precision of the crystallizer, controlling the opening degree shrinkage amount of a wide-surface copper plate of the crystallizer, and adjusting the narrow-surface taper of the crystallizer according to the type of the crystallizer; and finally, technological operation optimization is conducted, and the position of a tundish submersed nozzle, the fluctuation range of the liquid level of a crystallizer and the frequency of increasing and decreasing the pulling speed are controlled. According to the technical scheme, longitudinal cracks on the surface of the peritectic steel casting blank can be effectively controlled, and the quality and the production efficiency of the casting blank are improved.

The utility model provides a kind of deslagging machine water replenishing system, it is related to the technical field of deslagging flushing equipment, pressure tank structure includes pressure detection component, pressure detection component is connected with water supply structure electric signal, pressure detection component is used to detect the air pressure in pressure tank structure and sends electric signal to water supply structure, to make water supply structure open or close according to the electric signal of pressure detection component;Deslagging machine structure includes deslagging machine water replenishing valve and liquid level detection component, deslagging machine water replenishing valve is connected with the water outlet end of pressure tank structure;Liquid level detection component is connected with deslagging machine water replenishing valve electric signal, and liquid level detection component is used to detect the liquid level height of deslagging machine structure and sends electric signal to deslagging machine water replenishing valve, to make deslagging machine water replenishing valve open or close according to the electric signal of liquid level detection component.The utility model has alleviated the phenomenon that deslagging machine is caused by silt accumulation in prior art to cause water replenishing failure, full water overflow and water shortage dry ash, and further influence the technical problem of slag pit environment.

This invention relates to the field of clean steel smelting technology, specifically to a multi-channel turbulence controller and a continuous casting tundish. The multi-channel turbulence controller is a multi-channel diversion energy-dissipating turbulence controller, comprising a controller body and an internal hollow chamber. The controller body has a hollow chamber with an upper outlet at its center. Around the upper outlet, 4-8 vertically penetrating flow holes are arranged symmetrically around its perimeter. This invention enhances the mixing of the flow stream and the molten pool through the diversion effect of the multi-channel flow, consumes the turbulent kinetic energy of the returning molten steel, and significantly reduces the vertical upward backflow impact of the molten steel by utilizing the mutual interference of the flow streams. This stabilizes the slag-metal interface, fundamentally suppresses slag porosity formation during unsteady casting, reduces molten steel temperature drop, secondary oxidation, and slag entrapment, inhibits the formation of endogenous inclusions, alleviates crystallizer nozzle blockage, improves molten steel temperature uniformity, and enhances billet cleanliness and continuous casting production stability. It features a simple structure, convenient processing, and ease of industrial application.

The invention discloses a steel flow control hydraulic system, and relates to the technical field of steelmaking production. The device comprises a steel flow hydraulic station sliding nozzle control valve block device and a middle stopper rod oil cylinder control valve block device, the steel flow hydraulic station sliding nozzle control valve block device comprises an arranged working energy accumulator, emergency closing is achieved through a hydraulic control one-way valve, a sliding nozzle and other devices, and the situation that molten steel overflows uncontrollably in the steel casting process is avoided. When a fault occurs, the quick control valve and the hydraulic lock of the sliding nozzle can quickly enter an emergency closing mode, pressure oil is introduced into the stopper oil cylinder, the sliding nozzle is closed in time, the problem of steel overflow is avoided, a crystallizer is protected against the influence of excessive inflow of the molten steel, and the service life of the crystallizer is prolonged. The hydraulic valve is automatically controlled through the PLC, it is ensured that the opening degree of the nozzle is automatically adjusted according to the weight change of the tundish, and the molten steel flow is kept stable.

The utility model discloses a kind of continuous casting and rolling balance equipment based on intelligent control, including tundish main body, inner chamber, aluminium water guide groove, balance adjusting device includes support frame, drive component includes driving part, screw rod and sliding seat, day adjusting component includes balance cross bar, adjusting rod, controller, controller is connected with driving part by wire;The device improves the discharging mode of aluminium water tank, the discharge size of aluminium water guide groove is controlled by increasing balance device, and the up-and-down movement of sliding seat on the screw rod connected with driving part is controlled by the forward and reverse rotation of driving part controlled by controller, and then the driving force can be transmitted to the up-and-down movement of adjusting rod controlled by balance cross bar, so as to achieve the purpose of the discharge size of aluminium water guide groove, effectively solve the manual control of discharge size of discharge port, not only rough operation, workers also need to observe and operate from time to time, increase artificial cost and difficulty, there is the risk of crystallization of aluminium water.

To provide a tundish device satisfactory in slag exhaust properties and further satisfactory in uniformity of the temperature and cleanliness of a molten steel made to outflow to each mold, and an operation method using the same.SOLUTION: According to a certain viewpoint in this invention, a tundish device used for steel continuous casting comprises: a diffusion part widen into a fan shape from an injection part of a molten steel; and an exhaust port formed at the terminal of the diffusion part and exhausting a molten steel to each mold. The diffusion part is formed with at least one step along the side wall of the diffusion part and is formed with an inclination part inclined from the terminal of the diffusion part toward a slag exhaust hole.SELECTED DRAWING: Figure 5

To provide a method for producing a cast material with which the cast material having little and small surface defect and high quality can accurately be produced.SOLUTION: A method for producing a cast material includes a step of pouring molten metal from a tundish into a mold space formed by a left block group and a right block group, and an upper belt and a lower belt sandwiching the left block group and the right block group. The step of pouring the molten metal includes a step of bringing the tundish into contact with the lower belt by lowering the tundish while measuring an amplitude of vibration of the tundish at a specific frequency.SELECTED DRAWING: Figure 1

The invention relates to a foamed ceramic net fixing device for powder high-temperature alloy atomization pouring, which comprises a tundish and a forming assembly, a fixing assembly is arranged in the tundish, a hole is formed in the back surface of the tundish, and cylindrical clamping grooves are formed in the top and the bottom of the inner wall of the tundish; and the forming assembly comprises an outer mold, an inner mold is arranged in the outer mold, a wedge-shaped groove is formed in the outer surface of the inner mold, a cylindrical clamping groove mold is fixedly installed in the wedge-shaped groove, and a strong magnet is arranged in the inner mold. The foamed ceramic filter screen shifts in the hollow areas of the first semicircular sleeve box and the second semicircular sleeve box, so that an arched semicircular space is formed between the upper top surfaces of the interiors of the first semicircular sleeve box and the second semicircular sleeve box and the foamed ceramic filter screen; and two arc wedge blocks are symmetrically plugged in the space to downwards press the foamed ceramic filter screen, so that the foamed ceramic filter screen cannot move in the soaking process of molten steel.

The invention provides a method for continuously casting dissimilar steel by sharing the same tundish, which is characterized by comprising the following process steps of: 1) when high-carbon steel is smelted and cast to the last but one furnace, controlling the temperature of high-carbon molten steel to be 5-10 DEG C lower than the temperature of normal molten steel, and controlling the temperature of a continuous casting large ladle to be 1570-1575 + / -7 DEG C; the method comprises the following steps of (1) pouring molten high-carbon steel into a continuous casting tundish through a large continuous casting ladle, (2) pouring the last but one furnace of molten high-carbon steel into the continuous casting tundish through the large continuous casting ladle, and raising the liquid level of the molten high-carbon steel in the tundish, (3) putting a covering agent into the continuous casting tundish after deslagging of the last but one furnace of molten high-carbon steel in the continuous casting tundish is completed, and (4) before pouring of the last furnace of molten high-carbon steel, replacing a quick-change water gap of the continuous casting tundish with a water gap with the diameter phi of 17.5 mm, and reducing the pulling speed from 2.5 m / min to 2.0 m / min.

The utility model relates to long water gap related technical field especially relates to a glaze anti -crack type long water gap, the inside of long water gap ladle end, long water gap middle transition section and long water gap tundish end all is equipped with buffer composite component, the inner wall of long water gap ladle end, long water gap middle transition section and long water gap tundish end is provided with anchor assembly. The utility model discloses through the setting of buffer composite component, through the gradient change's honeycomb hole and hole, the nanometer heat conduction coating of dynamic adjustment heat conduction efficiency, realizes thermal stress dispersion and temperature regulation, and buffer composite component cooperates anchor assembly and anchors gradually complementary, and the destruction of heat stress to glaze layer is reduced to heat dissipation and buffer structure, and the anchor structure guarantees that glaze layer does not fall off under certain thermal stress and external force effect, and the anti -crack of long water gap glaze is realized together, and the overall performance and service life of long water gap are improved.

The present application relates to the technical field of steel, and in particular, relates to a manufacturing method of a continuous casting slab for a full protection casting crude oil storage tank container steel. The process of the open casting process protection casting - ladle injection tundish protection casting - tundish full protection casting - crystallizer protection casting - crystallizer full protection casting is adopted, the secondary oxidation of molten steel is effectively reduced, the center segregation of the cast slab is finally controlled below the B class 1.0 level, the center porosity is controlled below the 1.0 level, the H element content in the continuous casting slab after smelting is controlled to be 1.0-3.0 ppm, the O element content is controlled to be 10-30 ppm, the N element content is controlled to be 15-25 ppm, the grade of various inclusions in the steel plate is controlled to be below the 1.0 level, and the number of inclusions in the unit area is 4.5-5.5 pieces / mm 2 .

The utility model relates to a continuous casting process stuffing sand collecting device which comprises a stuffing sand receiving hopper, a cross beam rod, a lead screw guide rail, a support and a movable sliding rail, the stuffing sand receiving hopper is connected to one end of the cross beam rod, and the other end of the cross beam rod is connected with the lead screw guide rail and can be driven by a lead screw guide rail motor to move horizontally. The lead screw guide rail is fixed to the top of the support, the support walks along the movable sliding rail, and the movable sliding rail is arranged on one side of the tundish. Aiming at the problems of time and labor waste and potential safety hazards in the prior art, the ladle filler sand in the ladle nozzle can be quickly and safely collected, and the purity of molten steel is improved.

The application discloses a method for preventing overflow of slag in an impact area of a thread steel tundish, and the method comprises the following steps: automatically reducing the flow of bottom argon blowing at the end of a ladle pouring (remaining molten steel 9%~15%) to reduce the slag body from being involved from the source; adding a gradient composite deoxidizing alloy with specific structure and components when about 30 tons of molten steel is discharged, and the adding amount is accurately matched according to the strength grade (400MPa, 500MPa, 635MPa) of the thread steel and the oxygen content of the ladle slag; and periodically adding a low-aluminum-silicon-barium-calcium alloy in the impact area of the tundish for terminal deoxidization. The application also relates to a gradient composite deoxidizing alloy and a continuous casting production system for realizing the process. By using the application, the overflow of slag in the impact area can be completely eliminated (the overflow rate is reduced to 0%), the quality of the thread steel and the continuous casting efficiency (the number of pouring furnaces is increased to 23) are obviously improved, and the production cost is reduced.

This invention discloses a method for using waste resources from steel plants for slag splashing protection in converters after low-carbon steel smelting. This method improves the converter slag splashing protection process under low-carbon steel smelting conditions by controlling the amount of final slag, adjusting the final slag system, and optimizing the slag splashing process parameters. This enhances the effectiveness of slag splashing protection under low-carbon steel smelting conditions and provides a reference for the maintenance of converter linings after low-carbon steel smelting. This invention uses blast furnace dust, waste refractory materials from the tundish, and converter tail slag as slag conditioning materials, enabling the efficient recycling and utilization of these waste resources.

The utility model discloses a composite molten aluminum ladle lining, and relates to the technical field of casting melt containers such as casting ladles, tundishes, pouring cups or the like. The composite molten aluminum ladle lining comprises a ladle shell, a ladle lining bottom is fixedly connected to the bottom wall of the ladle shell, a ladle lining wall is fixedly bonded to the inner wall of the ladle shell, the ladle lining wall is fixedly connected to the upper side of the ladle lining bottom, an aluminum outlet pipeline is fixedly connected to the left side of the outer surface of the ladle shell, and the outer surface of the ladle shell is fixedly sleeved with a second flange; the ladle cover is installed on the upper side of the second flange, eight second bolts are installed on the upper side of the ladle cover in a threaded mode, and the heat preservation mechanisms are arranged on the aluminum outlet pipeline and the ladle cover correspondingly, in this way, multiple heat preservation measures cooperate for heat preservation, and heat loss of molten aluminum in the molten aluminum two-man ladle can be effectively reduced; and the temperature reduction speed of the molten aluminum in the transportation and temporary storage process is reduced, and energy consumption needed by follow-up machining is reduced.

The application discloses a continuous casting tundish stopper capable of inhibiting vortex, which comprises a stopper body, a baffle and a rib plate, the lower part of the stopper body is provided with the baffle and the rib plate, the upper end surface of the baffle is perpendicular to the center line of the stopper body, the side surface of the baffle forms a certain angle with the vertical direction, the rib plate is uniformly arranged along the vertical direction, and the rib plate is perpendicular to the horizontal plane; the outer wall of the stopper body, the adjacent baffle and the adjacent rib plate jointly enclose a cavity with a certain volume, and the number of the cavities is multiple. The application can separate and block the confluence vortex layer by layer by only changing the lower structure of the stopper, can effectively inhibit the confluence vortex, prevent the slag from entering the water gap, effectively reduce the tundish molten steel casting allowance, improve the metal yield, reduce the casting allowance treatment workload, and has the advantages of easy production, low cost, convenient operation and the like.