195 results about "Continuous casting mold" patented technology

The invention relates to a method for calculating the slag entrapment amount of continuous casting covering slag based on computational fluid mechanics, which adopts a large eddy simulation (LES) turbulence model, a multiphase flow model (VOF) and a discrete phase model (DPM) in CFD calculation, and combines a grid self-adaptive coarsening and refining mechanism and a VOF-to-DPM conversion mechanism. The method is used for numerical simulation and control of the slag entrapment amount of the continuous casting covering slag under the argon blowing condition, a slag entrapment mode calculation result is verified through a water model experiment, and a numerical simulation calculation result obtained through the method is well matched with a water model experiment result. Compared with the prior art, the method has the advantages that the slag entrapment amount of the continuous casting covering slag can be effectively calculated, and a basis is provided for controlling the slag entrapment amount of the covering slag.

The invention relates to the technical field of flux-cored wires. The preparation method comprises the following steps: weighing the following raw materials in parts by weight: 4-6 parts of chromium carbide powder, 7-9 parts of molybdenum powder, 6-8 parts of nickel powder, 10-15 parts of niobium powder, 15-18 parts of tungsten carbide powder, 7-11 parts of a modified titanium carbide agent, 5-8 parts of a blending agent added based on boron and 2-4 parts of 30-mesh natural graphite; 1-2 parts of sodium fluosilicate; 1-2 parts of aluminum powder; and 70-75 parts of iron powder. The flux-cored wire can adapt to complex service environments of parts such as rollers and continuous casting crystallizers in the metallurgical industry, the service life of the parts subjected to surfacing repair is prolonged, the production efficiency of the parts subjected to surfacing repair is improved, the obtained flux-cored wire achieves balance of high-temperature performance, mechanical performance and low-temperature stability, and the comprehensive applicability of products is improved.

The present invention relates to the technical field of steel metallurgy process simulation, and specifically relates to a simulation method for particle motion and interaction behavior within a continuous casting mold. The simulation method comprises the following steps: acquiring mold parameters and establishing a model; performing fluid domain volume extraction and structured mesh division on the model; importing the mesh model into simulation software and performing iterative solution; establishing injection points for argon bubbles and inclusions within the mold, compiling and calculating the flotation removal of argon bubbles and inclusions at a steel-slag interface, the capture thereof at a solidification front, and collision-aggregation, and performing coupled computation; and post-processing the simulation results to obtain the flow field, temperature field, solidified-shell distribution, and discrete-phase motion behavior within the mold at different time points. The method of the present invention enables analysis of the motion and interactions of discrete-phase particles such as argon bubbles and inclusions within the mold, thereby accurately predicting the distribution of the particles in the molten steel and the solidified shell.

The invention relates to a continuous casting process optimization method for inhibiting slag entrapment of casting powder, which adopts a CFD (computational fluid dynamics) calculation mode to obtain the slag entrapment rate of the casting powder in a crystallizer and the rate of capturing slag drops by a wall surface, can intuitively reflect the slag entrapment condition in the crystallizer, and realizes accurate control of the slag entrapment rate and the slag drop capturing rate. Furthermore, numerical simulation of continuous casting crystallizer slag entrapment is carried out on the basis of computational fluid mechanics (hereinafter referred to as CFD) under the conditions of certain section width and thickness of the crystallizer, certain inner diameter and insertion depth of the submersed nozzle and certain argon flow, and different dip angles of the submersed nozzle are adopted under the conditions of different pulling speeds; therefore, slag entrapment of the crystallizer casting powder is inhibited, and the occurrence rate of the slag entrapment defect of the automobile outer plate casting powder is reduced. Compared with the prior art, the method has the advantages that the slag entrapment rate and the slag drop capturing rate can be accurately controlled, and the steel-making defect occurrence rate of the surface of the automobile outer plate can be greatly reduced.

The invention relates to the technical field of continuous casting crystallizers, and discloses a detachable multi-stage water-cooling crystallizer structure and application thereof in copper column continuous casting, the detachable multi-stage water-cooling crystallizer structure comprises a cooling system and a crystallization pipe, the cooling system is used for cooling the crystallization pipe, the crystallization pipe comprises a plurality of crystallization plates, and the crystallization plates are arranged in the crystallization pipe. The crystallization pipe is formed by mutually splicing a plurality of crystallization plates in the direction around the axis of the crystallizer and the axial direction of the crystallizer, and the crystallization plates can move in the axial direction, so that replacement of the crystallization plates is realized; the cooling system comprises cooling pipes, the pipe walls of the cooling pipes are tightly attached to the outer pipe walls of the crystallization pipes, the crystallization plates correspond to one or more sets of cooling pipes, and the cooling system has the advantages that in the continuous casting production process, partition replacement of crystallizer copper plates can be achieved, the production cost of copper column continuous casting is reduced, and the production efficiency is improved.

The invention discloses a method for repairing a continuous casting crystallizer based on supersonic laser deposition additive, which comprises the following steps: removing dirt and scars on the surface of a crystallizer substrate by using a laser texturing technology, increasing the specific surface area of the crystallizer substrate, and then carrying out supersonic laser deposition additive repair on the treated substrate. An additive repairing layer and a high-temperature alloy strengthening layer with certain thicknesses are prepared by adjusting technological parameters; the substrate is strengthened through a heat treatment process, element diffusion is accelerated, and interlayer internal combination is enhanced; and finally, the crystallizer base plate is corrected and then machined into a finished product. According to the method, through the supersonic laser deposition additive process, the bonding capacity of the repairing layer and the base plate is enhanced, the deposition efficiency and the deposition speed are improved, the internal organization structure of the repairing layer is improved, and the comprehensive performance of service of the continuous casting crystallizer is enhanced.

The invention relates to an automatic control method for electromagnetic stirring parameters of a slab continuous casting crystallizer, which comprises the following steps of: 1, selecting a proper water gap immersion depth according to the condition of a continuous casting production field, 2, networking to obtain technological parameters such as a casting blank section, a casting speed, the water gap immersion depth and an argon blowing flow, and 3, automatically controlling and calculating the electromagnetic stirring parameters. The method comprises the following steps: step 1, calculating the most preferential stirring parameter under the current working condition through table look-up and interpolation calculation, step 4, outputting an electromagnetic stirring current parameter, step 5, executing the output electromagnetic stirring parameter, step 6, tracking the quality of a continuous casting slab product, repeating the steps 1-6 at regular time, and repeating the steps 2-6 under the condition that the step 1 is not changed. According to the scheme, casting blank surface defects are effectively removed, and the product quality is improved. After the optimized method is adopted, the occurrence rate of longitudinal cracks on the surface of the steel grade is reduced to 1.96% from 4.73%, and the defect rate of the steel grade is reduced to 3.93% from 8.41%.

The invention belongs to the technical field of metallurgical machinery, and particularly relates to a crystallizer vibration control method suitable for high-pulling-speed continuous casting and application. According to the method, a mathematical model is established for the vibration curve of the high-pulling-speed continuous casting crystallizer, through theoretical formula derivation and numerical calculation, the vibration curve is composed of seven lines including a straight line segment AB, a cosine line BC, a straight line CD, a cosine line DEF, a straight line FG, a cosine line GH and a straight line HI, and a speed expression, a displacement expression and an acceleration expression are given in sequence. And finally simulating, calculating and drawing a displacement curve, a speed curve and an acceleration curve. The vibration curve has the advantages that under the same pulling speed, the vibration acceleration is small, the vibration is stable, and the system load is small; the acceleration curve is continuous and guidable, vibration is stable, and basic guarantee is provided for good casting blank surface quality. And finally, the method is used for design guidance of the vibration mode of the high-pulling-speed continuous casting crystallizer.

The invention belongs to the technical field of laser cladding and metal surface repair, and relates to a preparation method of a laser cladding reinforced wear-resistant coating for a continuous casting crystallizer copper plate, firstly, an intermediate coating for laser cladding of the surface of the copper plate is prepared by using a binder and metal powder, and the laser reflectivity of the prepared intermediate coating is greatly reduced compared with that of the copper plate; then, a laser pre-cladding process is carried out on the surface of the copper plate, so that firm metallurgical bonding is generated between the intermediate coating and the copper plate, and conditions are created for the laser cladding process for strengthening the wear-resistant layer; and finally, the continuous casting crystallizer copper plate coating of which the wear-resisting property at the high temperature of 300 DEG C is obviously superior to that of a traditional electroplating coating is obtained by designing material components of a strengthened wear-resisting layer and a laser cladding process, and the industrial problem that laser cladding is difficult to directly carry out on the surface of a traditional copper plate is solved.

A flow field control device and method for a slab continuous casting crystallizer includes: a traveling wave magnetic field generator arranged on the upper part of both sides of the wide face of the slab continuous casting crystallizer, near the lower part of the molten steel meniscus to the upper edge of the submerged entry nozzle outlet, wherein the electromagnetic force generated by the traveling wave magnetic field generator is parallel to the wide face of the slab; DC static magnetic field generators are respectively arranged on the lower part of both sides of the wide face of the slab continuous casting crystallizer and on the molten steel streams on both sides of the submerged entry nozzle, wherein the two static magnetic field generators are perpendicular to the wide face of the slab and the magnetic field directions are opposite; several temperature measuring points and corresponding temperature measuring elements are arranged at intervals along the height direction on the two narrow face crystallizer copper plates of the slab continuous casting crystallizer, wherein at least one temperature measuring point on each of the two narrow face crystallizer copper plates is less than 100 mm away from the upper edge of the narrow face crystallizer copper plate; the distance from each temperature measuring point to the surface of the crystallizer copper plate is the same; and a controller, wherein the traveling wave magnetic field generator, the static magnetic field generator, and the temperature measuring elements are electrically connected to the controller.

The invention relates to a method for preparing rare earth steel by refining prefabricated slag of a CaO-Al2O3-REO-MgO slag system, belongs to the technical field of ferrous metallurgy, and solves the technical problem of how to prepare the rare earth steel by refining the prefabricated slag of the CaO-Al2O3-REO-MgO slag system so as to improve the rare earth yield. The invention discloses a method for refining and preparing rare earth steel by using prefabricated slag of a CaO-Al2O3-REO-MgO slag system. The method comprises the following steps: S1, paving a deoxidizing agent, the prefabricated slag and lime at the bottom of a steel ladle before tapping, and tapping; s2, slag adjustment operation of the LF furnace; step S3, alloying is carried out; s4, treating white slag for more than or equal to 20 minutes, and performing calcium treatment; s5, argon blowing is carried out, and an LF furnace station is left; s6, RH treatment is carried out; s7, adding a rare earth iron alloy; s8, vacuum breaking is carried out after vacuum circulation, and the robot leaves the RH station; s9, a tundish covering agent is scattered on the surface of the molten steel; and S10, the surface of the molten steel is protected through continuous casting crystallizer casting powder. The yield of the rare earth elements is 40% or above.

The present invention discloses a logical judgment method for longitudinal surface cracks of continuous casting billets based on temperature characteristics, belonging to the field of iron and steel metallurgy. The method is characterized by including: establishing a sample database for longitudinal surface cracks of continuous casting billets; calculating the temperature characteristic values of thermocouples in the continuous casting mold; obtaining the temperature characteristic value range of longitudinal surface cracks of continuous casting billets; and judging the longitudinal surface cracks of continuous casting billets. It can accurately and quickly identify the longitudinal surface cracks of continuous casting billets, providing an effective method for on-line detection of longitudinal surface cracks of continuous casting billets. It is scientific, reasonable, highly applicable and has good effects.

The invention relates to the technical field of steel production, in particular to rare earth weather-proof angle steel and a manufacturing method thereof, and the manufacturing method comprises the steps of converter / electric furnace steelmaking, LF refining, non-metallic inclusion modification treatment, continuous casting and hot rolling. During steelmaking, the temperature of molten iron entering a furnace is not less than 1250 DEG C, and S is not more than The steel-making end point is controlled to be 0.04%-0.07% of C and 0.005%-0.015% of P; after refining is finished, a Si-Ca wire or a Ca wire is fed for non-metallic inclusion modification treatment, and Ca / Al in molten steel reaches 0.08-0.12; during continuous casting, 0.10-0.16 kg of rare earth elements are added into each ton of steel by adopting a method of feeding rare earth wires into a crystallizer, and the carbon content in the steel is 0.07%-0.14%; and selecting continuous casting crystallizer casting powder matched with the steel grade. By adding La or / and Ce and combining specific operation condition control, the rare earth weather-proof angle steel with a good anti-corrosion effect is obtained.

The utility model relates to a casting slag stopping device, which is used for filtering and stopping scum on the surface of molten aluminum, and comprises a shunting bag and a slag stopping ring, the shunting bag is in a net bag shape, is convenient for filtering the scum and simultaneously is convenient for uniformly shunting the molten aluminum, the shunting bag is adjustably connected below a casting flow table, and the shunting bag is horizontally arranged; a slag blocking ring is further adjustably arranged below the casting flow table and horizontally arranged on the periphery of the flow dividing bag in a surrounding mode, scum in molten aluminum flowing out of the flow dividing bag can be conveniently intercepted, a distance exists between the slag blocking ring and the flow dividing bag, the intercepted scum is located in the distance range, and the slag blocking ring extends downwards into the continuous casting crystallizer. And the lower part of the slag stopping ring is immersed into molten aluminum in the continuous casting crystallizer. According to the utility model, scum is filtered through the shunting bag, and then the scum is gathered in a smaller range through the scum baffle ring, so that the scum is conveniently cleaned manually.

An immersion nozzle for discharging molten steel supplied from a tundish into a mold for continuous casting of a slab includes a discharge portion that supplies the molten steel to the mold, wherein the immersion nozzle includes two regions divided by a plane in a thickness direction, the plane passing through an axial center, the discharge portion includes: a bottom portion; and a side wall that extends in a height direction from an outer edge of the bottom portion, four discharge holes are formed in the discharge portion, two discharge hole are arranged side by side in a width direction in each of the regions in the bottom portion of the discharge portion.

The invention relates to the technical field of continuous casting, in particular to a composite vibration continuous casting crystallizer and a working method thereof. The composite vibration continuous casting crystallizer comprises a crystallizer body composed of wide-edge side walls and narrow-edge side walls, and the two oppositely-arranged wide-edge side walls and the two oppositely-arranged narrow-edge side walls jointly form a cavity for containing metal melt and generating a continuous casting billet. The wide-edge side wall is connected with the horizontal vibration device, the narrow-edge side wall is connected with the vertical vibration device, the wide-edge side wall vibrates in the horizontal direction during continuous casting, and the narrow-edge side wall vibrates in the vertical direction during continuous casting. According to the continuous casting crystallizer, a vibration mode combining horizontal vibration and vertical vibration is adopted, continuous casting billets with slight vibration marks or even no vibration marks can be obtained, meanwhile, a liquid casting powder channel is smooth, and the continuous casting billets in the crystallizer can be cooled more sufficiently and evenly.

An origin seeking device and method for a continuous casting mold vibration system, belonging to the technical field of continuous casting mold vibration control. The origin seeking device includes a mold, a vibration table frame, an electric cylinder, and a positioning base. A origin seeking detection component is arranged on the positioning base. The origin seeking detection component includes an adjustment bracket, proximity switch I, proximity switch II, and proximity switch III. The distance between proximity switch I and proximity switch III is equal to the maximum stroke of the electric cylinder's action trajectory. The height where proximity switch II is located is flush with the height of the movable end of the electric cylinder when the vibration table frame returns to the horizontal position. The beneficial effects of the present invention are that the origin seeking device has a simple structure, is convenient for installation and adjustment, has strong versatility, a long service life, realizes the automatic control of origin seeking, improves the efficiency and accuracy of origin seeking operations, reduces the labor intensity of workers, improves the rhythm of continuous casting pouring, reduces the mechanical failures of the electric cylinder, reduces the breakout accident, and improves the quality of the cast slab.

The invention relates to a self-adaptive control system of a continuous casting crystallizer, which is applied to the field of metal continuous casting and comprises a crystallizer body and a continuous casting crystallization controller. Through the synergistic effect of a shaping cooling roller assembly, a cooling monitoring assembly, a cooling contact regulation and control module and a cooling shaping feedback module, on one hand, the actual state of a casting blank is sensed in real time, and the crystallization cooling process is dynamically adjusted, so that self-adaptive adjustment of the cooling strength is achieved, and the automation and intelligence level of a crystallizer body is remarkably improved; on the other hand, a monitoring mechanism of a casting blank state can be constructed, and abnormal recognition and process deviation correction can be realized at the beginning of quality deviation by collecting action parameters of a crystallizer body and thermal state information of the casting blank in real time, so that the rejection rate and the production cost are effectively reduced, and the production efficiency is improved. The economic benefit of a continuous casting production line is improved.

Provided herein is a system, apparatus, and method for providing casting gas to a direct chill casting mold, and more particularly, to supplying casting gas to a direct chill casting mold at a well-regulated pressure and volume using fluid injectors. Systems for supplying casting gas to a continuous casting mold can include: a continuous casting mold cavity; a casting gas supply line; an injector receiving casting gas from the casting gas supply line; and a post injector casting gas supply line, where the casting gas supply line provides casting gas at a pressure above 300 psi (pounds per square inch) to an input of the injector, where a controller controls the injector to supply casting gas via the post injector casting gas supply line to the continuous casting mold cavity.

The present application belongs to the technical field of liquid surface fluctuation evaluation of crystallizer molten steel, and particularly relates to a liquid surface fluctuation evaluation and regulation method for a thin slab continuous casting crystallizer with a multi-hole submerged entry nozzle. The method comprises the following steps: obtaining the width and thickness of the thin slab continuous casting crystallizer; obtaining the area of each outlet on one side of the multi-hole submerged entry nozzle of the thin slab continuous casting crystallizer, and respectively calculating the weight value of each outlet in molten steel flow distribution; obtaining the typical casting speed and submerged entry nozzle immersion depth used during stable production of the thin slab continuous casting machine; obtaining the position, speed and angle of the molten steel jet impact on the narrow surface of the crystallizer; calculating the liquid surface fluctuation index of each outlet jet according to the outlet area weight value; mathematically adding the liquid surface fluctuation index of each outlet jet to obtain a comprehensive liquid surface fluctuation index; and controlling the comprehensive liquid surface fluctuation index within a reasonable range by adjusting the production parameters such as casting speed and submerged entry nozzle immersion depth to achieve the purpose of regulating the liquid surface fluctuation of the crystallizer.

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 application provides a thin slab continuous casting crystallizer copper plate with a cooling structure and relates to the technical field of metallurgical continuous casting. In the two flat parts of the cooling surface, each flat part includes high-temperature zone flow guide cooling ribs, transition zone flow guide cooling ribs and low-temperature zone flow guide cooling ribs between the two adjacent cooling zones, and the height and width of the high-temperature zone flow guide cooling ribs are smaller than the height and width of the transition zone flow guide cooling ribs and the height and width of the low-temperature zone flow guide cooling ribs; the cooling water groove includes high-temperature zone cooling water grooves, transition zone cooling water grooves and low-temperature zone cooling water grooves, and the width of the high-temperature zone cooling water grooves is larger than the width of the transition zone cooling water grooves and the width of the low-temperature zone cooling water grooves. Through the optimized design of the high-temperature zone, the cooling capacity of the copper plate is improved, the temperature of the hot surface of the eddy current zone with high heat flux density is reduced, the occurrence of the copper plate crack phenomenon is improved or completely eliminated, and the service life of the copper plate is prolonged.

The invention discloses low-viscosity stable casting powder suitable for high-speed continuous casting of Q355B steel, belongs to the technical field of casting powder preparation, and aims at solving the technical problem that the melting performance and the operation stability of existing continuous casting powder need to be further improved in the using process. According to the invention, lithium boron aluminum silicon glass precursor powder, oxygen-nitrogen crystal control micronucleus powder and calcium magnesium phosphorus boron viscoelastic powder are synergistically introduced into the continuous casting mold flux, and systematic configuration is carried out on the preparation and batching process, so that a multi-layer synergistic structure organization path covering the whole process of melting starting, liquid slag formation and slag film evolution is constructed; according to the technical scheme, the casting powder keeps proper viscosity, low melting temperature and short melting time, co-evolution of liquid phase generation and slag film formation is achieved, and stable interface behavior and structural response are shown in actual continuous casting operation; and therefore, the occurrence tendency of defects such as pinhole bubbles, honeycomb bubbles and middle cracks on the surface of the Q355B steel continuous casting billet can be reduced.

The present application relates to a kind of embedded film thermocouple array heat flow sensor for slab continuous casting crystallizer and on-line monitoring method, belong to continuous casting process detection technical field.Sensor includes flexible insulating substrate, thin film thermocouple array being arranged on the surface of flexible insulating substrate, lead electrode being connected with thin film thermocouple array, and protective packaging layer for covering thin film thermocouple array.Monitoring method includes, calibrating sensor is embedded in crystallizer copper plate hot face, real-time acquisition potential signal output by each subunit of thin film thermocouple array;Local heat flow density at each thermocouple subunit is calculated, and the instantaneous heat flow distribution cloud picture of crystallizer copper plate surface is reconstructed by interpolation method;When local heat flow density exceeds preset threshold or heat flow fluctuation amplitude exceeds set range, prewarning signal is sent.The present application realizes the in-situ, direct measurement of crystallizer hot face heat flow, response speed is fast, can realize transient heat flow measurement and the fine measurement of local heat flow distribution.

Provided is a mold copper plate with which it is possible to form a solidified shell of a slab in an appropriate state and with which it is possible to prolong the life of a coating layer applied to the mold copper plate. A mold copper plate for a continuous casting mold has a base material layer comprising copper or a copper alloy, and a coating layer provided on the base material layer. The coating layer includes at least one of nickel, cobalt, a nickel-based alloy, a cobalt-based alloy, and a stainless steel alloy as a component element, and includes an alloy including at least one of a metal nitride, a metal carbide, and a metal oxide as another component element. According to the invention, the solidification shell of the slab can be formed in an appropriate state, and the service life of the coating applied to the mold copper plate can be prolonged.

The application provides a continuous casting crystallizer vibration device residual life prediction method, comprising the following steps: S1. obtaining the vibration deflection of the continuous casting crystallizer vibration device to be measured and taking the vibration deflection as degradation data; S2. constructing a continuous casting crystallizer vibration device degradation model; S3. determining a drift coefficient in the degradation model and a parameter vector of the drift coefficient based on a nonlinear function regression algorithm; S4. estimating the prior parameters of the continuous casting crystallizer vibration device degradation model based on an expectation maximization (EM) algorithm and determining optimal prior parameters θ; S5. constructing a residual life probability density model, substituting the prior parameters into the residual life probability density model to calculate residual life probability values, and taking the residual life corresponding to the maximum probability value as the final prediction value of the residual life of the continuous casting crystallizer vibration device; only the degradation data of the continuous casting crystallizer vibration device to be measured is needed to accurately predict the residual life of the vibration device.

The utility model discloses an up-drawing continuous casting crystallizer for oxygen-free copper material production, which comprises a crystallizer body, a cooling copper sleeve is arranged in the crystallizer body, a graphite shaping pipe is arranged in the cooling copper sleeve in a penetrating manner, a water inlet and a water outlet are arranged on the outer end face of the crystallizer body and are respectively communicated with the cooling copper sleeve, and the water inlet and the water outlet are communicated with the cooling copper sleeve. A copper forming channel is formed in the center of the graphite shaping pipe, and plugging assemblies are arranged at the two ends of the crystallizer body to plug and fix the cooling copper sleeve and the graphite shaping pipe. The utility model belongs to the technical field of copper material crystallizers, and particularly solves the problems that after a cooling copper sleeve in a crystallizer in the prior art is used for a long time, incrustation is formed in the cooling copper sleeve, so that the cooling effect on a graphite sizing pipe is influenced; and the upward continuous casting crystallizer for producing the oxygen-free copper material solves the problem that a cooling copper sleeve is not convenient to disassemble and replace.

The application discloses a crystallizer heat flux inverse calculation method and system based on optical fiber temperature measurement, a medium and equipment, which realizes real-time acquisition of temperature measurement data through optical fiber sensors arranged in a slab continuous casting crystallizer of a steel plant, and combines with the running process conditions (steel composition and casting speed). First, the on-site temperature measurement data is collected and stored, then the noise data is processed by using a smoothing exponential algorithm according to the data characteristics, then a stable data source is selected for big data empirical formula fitting to determine the empirical formula parameters, thereby providing a reference for setting the initial value of iterative calculation and serving as a way to test the accuracy of model calculation in the future. According to the arrangement characteristics of the optical fiber temperature measurement sensor, heat transfer calculation is carried out by using a longitudinal modeling method. In addition, a man-machine interface based on a Web front-end visualization technology is further developed to more intuitively and effectively monitor the temperature of the crystallizer part. The method solves the problems of poor accuracy and sensitivity of the previous temperature measurement method relative to optical fiber temperature measurement, the data noise processing is adopted for the large amount of data of optical fiber temperature measurement, and the direct inverse calculation method of the longitudinal heat flux of the crystallizer is adopted, so that the calculation is simple and the result is accurate.

The utility model belongs to the technical field of hollow circular tube blank continuous casting, and particularly relates to an electromagnetic stirring device for a hollow circular tube blank continuous casting crystallizer, which is arranged inside an inner layer water jacket (5) of a hollow circular tube blank continuous casting crystallizer assembly and is coaxially arranged with the continuous casting crystallizer. The device comprises a built-in stirrer inner shell (16), a built-in stirrer yoke (8) and a built-in stirrer outer shell (9) which are sequentially and coaxially arranged from the axis to the outside, a plurality of built-in stirrer magnetic teeth (7) are circumferentially and uniformly arranged on the outer circumference of the built-in stirrer yoke (8), and a built-in stirrer coil (6) is wound on the outer side of each built-in stirrer magnetic tooth (7); and cooling water is filled between the built-in stirrer outer shell (9) and the built-in stirrer inner shell (16). The device has the characteristics of good metallurgical effect and low power consumption.

The invention relates to the technical field of clean steel smelting, in particular to a continuous casting crystallizer slag entrapment evaluation method which comprises the following steps: constructing a crystallizer three-dimensional model, taking a pipeline section at a crystallizer nozzle outlet, and calculating the molten steel flow at the nozzle side outlet; selecting an impact area formed after the fluid impacts the narrow surface of the crystallizer, and calculating the coordinates of an impact point; calculating the included angle between the jet flow of the nozzle side outlet and the horizontal plane according to the impact point coordinates, and obtaining the molten steel flow of the impact slag-metal interface according to the molten steel flow of the nozzle side outlet; the molten steel impact force is calculated according to the molten steel flow of the impact slag-metal interface; and the ratio of the impact force of the molten steel to the tension of the half slag-metal interface serves as a slag entrapment evaluation index and is used for judging whether slag entrapment occurs or not. According to the method, the slag entrapment phenomenon is judged through objective quantitative indexes, the stability of the casting quality can be effectively improved by accurately evaluating the slag entrapment risk, and the production cost of cast steel is reduced.