CN111113637A

CN111113637A - Combined special-shaped blank continuous casting tundish turbulence controller and preparation method thereof

Info

Publication number: CN111113637A
Application number: CN202010067179.8A
Authority: CN
Inventors: 武光君; 郭伟达; 李强笃; 宁伟; 冯启超; 张海波; 崔振
Original assignee: Laiwu Steel Group Yinshan Section Steel Co Ltd
Current assignee: Laiwu Steel Group Yinshan Section Steel Co Ltd
Priority date: 2020-01-20
Filing date: 2020-01-20
Publication date: 2020-05-08

Abstract

The invention discloses a combined special-shaped blank continuous casting tundish turbulence controller and a preparation method thereof, wherein the turbulence controller comprises a shell, a sleeve core upper part, a sleeve core lower part and a conical protruding structure arranged on the bottom surface of the sleeve core lower part, the method comprises the steps of determining the position of each part, filling a joint seam, coating a regenerated magnesia carbon coating material and naturally curing, the effect of inhibiting the turbulent kinetic energy of ladle pouring turbulence is improved, the flow characteristic of molten steel in a tundish is effectively improved, the combined structure design of the body shell, the sleeve core upper part and the sleeve core lower part is adopted, the sleeve core upper part and the sleeve core lower part are integrally designed and prepared by adopting different materials and in a split mode, the shape design of a combined sleeve core inner cavity is based on the numerical simulation research and application test of the special-shaped blank tundish, and the performance requirements of metallurgy functionalization, long service life and low cost are met simultaneously.

Description

Combined special-shaped blank continuous casting tundish turbulence controller and preparation method thereof

Technical Field

The invention relates to the technical field of continuous casting refractory material processes, in particular to a combined type special-shaped blank continuous casting tundish turbulence controller and a preparation method thereof.

Background

The turbulence controller is arranged in the tundish of the continuous casting machine, so that the running route of molten steel in the tundish can be changed, the retention time is prolonged, floating removal of impurities is promoted, the important effect on improving the quality of a casting blank is achieved, meanwhile, the scouring of a ladle pouring stream on a tundish working lining impact area can be slowed down, and the continuous casting time of the tundish is prolonged. In recent years, the production technology of the turbulence controller is developed to the metallurgy functionalization, the longevity and the cost reduction, but the tundish turbulence controller produced by the prior art cannot meet the performance requirements of the metallurgy functionalization, the longevity and the cost reduction at the same time.

The patent document with the publication number of CN104707956B discloses a special-shaped blank continuous casting tundish turbulence controller and an installation method thereof, wherein the controller comprises a shell, a bottom plate, a sleeve core and a pressure ring, the shell is of a cavity structure with an opening at the upper end, the bottom plate is positioned at the bottom of a cavity of the shell, the bottom end of the sleeve core is positioned above the bottom plate, the pressure ring is arranged at the upper end of the sleeve core and positioned in the cavity of the shell, and expansion gaps are arranged between the bottom of the cavity of the shell and the bottom plate as well as between the inner wall of the shell and the sleeve core. The invention has the following defects: the inner cavity is cylindrical, the effect of inhibiting turbulent energy of the ladle pouring flow is poor, the flow characteristic of molten steel in the tundish is not favorably improved, and meanwhile, the sleeve core is annularly built by adopting arc magnesia carbon bricks, so that the integral performance is poor, bricks are easy to fall off, the production cost is high, and the cost of continuous casting refractory materials is increased.

Disclosure of Invention

The invention aims at the problems, provides a combined special-shaped blank continuous casting tundish turbulence controller and a preparation method thereof, improves the effect of inhibiting the turbulent kinetic energy of the ladle pouring turbulence, effectively improves the flow characteristic of molten steel in a tundish, adopts the combined structure design of a body shell, the upper part of a sleeve core and the lower part of the sleeve core, adopts the integral design, adopts different materials and is prepared in a split way, and the shape design of the inner cavity of the combined sleeve core is based on the numerical simulation research and application test of the special-shaped blank continuous casting tundish, and simultaneously meets the performance requirements of metallurgy functionalization, long service life and low cost.

The technical scheme for solving the technical problem of the invention is as follows:

the utility model provides a package turbulence controller in middle of modular dysmorphism base continuous casting, includes shell and cover core, the cover core set up in the inner chamber of shell, cover core upper portion, cover core lower part including setting up from top to bottom, cover core lower part set up on the bottom surface of shell inner chamber, and the coincidence of the vertical central line of cover core upper portion and cover core lower part and the vertical central line of shell inner chamber is equipped with the joint line between the lateral wall of shell and cover core, the bottom of the inner chamber of cover core is equipped with a plurality of conical protruding structures, protruding structure array distribution on the circle that uses the vertical central line of cover core lower part as the axle center. The bottom of the inner cavity of the sleeve core is provided with the plurality of conical protruding structures, the conical protruding structures are distributed on the circle with the longitudinal center line of the lower part of the sleeve core as the axis in an array manner, the protruding structures are designed into the shapes of a circle, a semicircle or a truncated cone in a relative ratio, the conical protruding structures are higher in height under the condition of the same volume, the effect of inhibiting the turbulent kinetic energy of the steel flow is better, and the conical protruding structures distributed in the circular array manner jointly act, so that the conical protruding structures have the better effect of inhibiting the turbulent kinetic energy of the steel flow.

Furthermore, the inner cavity at the upper part of the sleeve core is in a circular truncated cone shape with a small inner diameter at the upper part and a large inner cavity at the lower part, the bottom surface of the inner cavity at the lower part of the sleeve core is an arc curved surface, and the side wall and the bottom surface of the inner cavity at the lower part of the sleeve core are in transition through an arc chamfer. The upper part of the sleeve core is designed into a structure with a small upper opening and a large lower inner diameter, so that the splashing problem of molten steel is solved.

Furthermore, the upper part of the sleeve core is in a circular truncated cone shape with a large upper bottom surface and a small lower bottom surface, and the lower part of the sleeve core is in a circular truncated cone shape with a large upper bottom surface and a small lower bottom surface. According to the design, the side wall of the sleeve core is of a structure with a thick upper end and a thin lower end, and the upper part is heavier than the lower part when the steel flow scours the upper part in the pouring process, so that the technical problem that the erosion rate of the upper part is higher than that of the lower part is solved, and the service life of the turbulence controller is prolonged.

Further, the width of the bonding seam is large at the upper part and small at the lower part. The upper width m is 10-15 mm, and the lower width n is 5-10 mm. Through the design that the upper part of the joint seam is wide and the lower part of the joint seam is narrow, the density of the filler at the lower part of the joint seam can be naturally increased, and the problem of steel infiltration of the joint seam which is penetrated from top to bottom is effectively solved.

Further, the number of the convex structures is four.

Further, the height a of the upper portion of the sleeve core is 258-288 mm, the outer diameter D1 of the upper bottom surface of the upper portion of the sleeve core is 650-700 mm, the inner diameter D1 of the upper bottom surface of the upper portion of the sleeve core is 350-400 mm, the outer diameter D2 of the lower bottom surface of the upper portion of the sleeve core is 550-600 mm, the inner diameter D2 of the lower bottom surface of the upper portion of the sleeve core is 420-470 mm, the height b of the lower portion of the sleeve core is 172-202 mm, the outer diameter D2 of the upper bottom surface of the lower portion of the sleeve core is 550-600 mm, the outer diameter D3 of the lower bottom surface of the lower portion of the sleeve core is 475-525 mm, the radius R of the circular arc chamfer of the lower portion of the sleeve core is 82-102 mm, the thickness c of the lower portion of the sleeve core is 90-100.

Further, protruding structure evenly distributed on the diameter phi of inner chamber bottom surface be 130 ~ 150mm on the circle, conical protruding structure's bottom surface circle diameter d is 70 ~ 80mm, highly h is 70 ~ 80 mm.

A preparation method of a combined type special-shaped blank continuous casting tundish turbulence controller comprises the following steps:

s1: the lower part and the upper part of the sleeve core are sleeved in the shell of the turbulence controller from bottom to top in sequence, so that the longitudinal center lines of the lower part and the upper part of the sleeve core are ensured to be superposed with the longitudinal center line of the inner cavity of the shell;

s2: the joint seam between the shell and the sleeve core is filled with sintered magnesia with the granularity less than or equal to 1 mm;

s3: coating a layer of regenerated magnesia-carbon coating material with the thickness of 25-35 mm on the outer surface of the sintered magnesia filled in the joint seam, namely the upper surface of the sintered magnesia; the coating material is used for preventing sintered magnesia in the joint seam from falling off and preventing the sleeve core from loosening and other quality problems caused by the sintered magnesia;

s4: naturally curing for 1-2 days, and completing the preparation of the combined special-shaped blank continuous casting tundish turbulence controller;

the shape and the size of the shell are designed according to the shape and the size of a work lining impact area of a continuous casting tundish of a special-shaped blank, and the shell is prepared by casting and molding a magnesium castable produced by the prior art, naturally maintaining and baking in a heating furnace.

The magnesium castable is produced by the prior art, the MgO content is more than or equal to 80 wt%, and the volume density is more than or equal to 2.8g/cm³The breaking strength (1500 ℃) is more than or equal to 12 Mpa.

Further, the upper part of the sleeve core is prepared by an isostatic pressing method, the isostatic pressing method utilizes the incompressible property and the uniform pressure transmission property of a liquid medium to uniformly pressurize the sample from all directions, and the pressure applied to the powder in all directions is uniform and consistent, so that the powder is formed more compactly and uniformly, and the method comprises the following steps:

1) preparing materials:

preparing fine sintered magnesia powder: the particle size of 0.074mm is less than<The 1mm waste magnesia carbon brick regenerated particle material is hydrated, and is ground into sintered magnesia fine powder with the granularity less than or equal to 0.074 by a ball mill, and in the high-temperature use process of the magnesia carbon brick, the metal aluminum powder in the magnesia carbon brick and carbon can generate oxidation reduction reaction to generate Al₄C₃Al in used waste magnesia carbon bricks₄C₃Easy reaction with water: al (Al)₄C₃+12H₂O＝4Al(OH)₃+3CH₄@, the volume of the solid generated by the reaction is increased by 1.65 times, which can lead to pulverization and cracking of the waste magnesia carbon bricks. Through further research and analysis, the Al is found out₄C₃Mainly exists in the grain size of 0.074mm <<1mm of granules. Therefore, the invention uses the granularity of 0.074mm < the<Carrying out spray hydration and natural drying treatment on 1mm waste magnesia carbon brick regenerated particles, grinding the particles into a material with the particle size less than or equal to 0.074 by using a ball mill, and enabling the particle size of the material to be less than or equal to 0.074mm in the composition<1mm of material, adopting sintered magnesia particles.

Weighing the materials according to the proportion, taking the waste magnesia carbon brick regenerated particle material as a main raw material, and comprising the following materials in percentage by weight: 20-24% of waste magnesia carbon brick regenerated particles with the particle size less than or equal to 3mm, 28-32% of waste magnesia carbon brick regenerated particles with the particle size less than or equal to 1mm, 10-14% of waste magnesia carbon brick regenerated fine powder with the particle size less than or equal to 0.074mm, 10-15% of sintered magnesia with the particle size less than or equal to 0.074mm, 5-9% of sintered magnesia with the particle size less than or equal to 0.074mm, 7-10% of flake graphite, 4-5% of antioxidant and 3.5-4.5% of phenolic resin.

The antioxidant is as follows: one or a mixture of more of aluminum powder, silicon powder and silicon carbide powder.

The sintered magnesia is produced by using light-burned magnesia with the MgO content of 95 wt% as a raw material through the processes of ball pressing, high-temperature shaft kiln calcination and the like, and the MgO content is 94-95 wt%.

The purity C content of the flake graphite is more than or equal to 98 wt%, and the granularity is 100 meshes.

The Al powder has a purity AI content of more than or equal to 99 wt% and a particle size of 100 meshes.

The silicon powder has the purity Si content of more than or equal to 97 wt% and the granularity of 100 meshes.

The SiC content of the silicon carbide powder is more than or equal to 94 wt%, and the granularity is 100 meshes.

The solid content of the phenolic resin is more than or equal to 72 wt%, the residual carbon content is more than or equal to 42 wt%, and the water content is less than or equal to 5 wt%.

The waste magnesia carbon brick regenerated particle material is four particle grades of particle materials with the particle size of less than or equal to 3mm and less than or equal to 5mm, the particle size of less than or equal to 1mm and less than or equal to 3mm, the particle size of less than or equal to 0.074mm and the particle size of less than or equal to 1mm, which are obtained after the waste magnesia carbon brick is processed by removing a slag layer, sorting, magnetic separation, crushing, wheel milling and the like, and classified screening.

Aiming at the problems that the waste magnesia carbon brick regenerated particles contain crystalline flake graphite and are easy to oxidize, the weight percentage of the crystalline flake graphite is properly reduced and the weight percentage of an antioxidant is increased in the material composition of the sleeve core which takes the waste magnesia carbon brick regenerated particles as the main raw material, so that the problems of reduced oxidation resistance and corrosion resistance of the regenerated magnesia carbon brick which is developed by taking the waste magnesia carbon brick regenerated particles as the main raw material in the prior art are solved.

2) Mixing:

preheating a mixing roll to 40-50 ℃,

adding sintered magnesia with the granularity being less than or equal to 3mm and less than or equal to 5mm, the granularity being less than or equal to 1mm and the granularity being less than or equal to 1mm when the mixing roll is at low speed,

dry-mixing for 1-2 min, adding phenolic resin,

wet mixing for 2-3 min, adding flake graphite,

adding an antioxidant and sintered magnesia fine powder with the granularity less than or equal to 0.074mm after wet mixing for 2-3 minutes,

wet mixing for 2-3 minutes, high-speed mixing for 10-15 minutes,

discharging;

the temperature of the pug is less than 70 ℃ in the mixing process;

3) green body forming: filling the mud into a mold, then removing air in the mold, pressing and molding under the pressure of 200-250 MPa by equal static pressure, and then discharging the mold, thus completing green body molding;

4) storing the green bodies for 4-8 hours at room temperature, and then baking in a kiln:

uniformly and continuously heating the mixture from room temperature to 80 +/-10 ℃, heating and preserving heat for 8-16 hours respectively,

uniformly and continuously heating the mixture from 80 +/-10 ℃ to 150 +/-10 ℃, heating and preserving heat for 4-8 hours respectively,

uniformly and continuously heating the mixture from 150 +/-10 ℃ to 200 +/-10 ℃, heating and preserving heat for 8-16 hours respectively,

stopping fire, naturally cooling, and taking out of the kiln, and finishing the preparation of the upper part of the sleeve core, wherein the compressive strength of the sleeve core is more than or equal to 40 MPa.

Further, the lower part of the sleeve core is prepared by an isostatic pressing method, the isostatic pressing method utilizes the incompressible property and the uniform pressure transmission property of a liquid medium to uniformly pressurize the sample from all directions, and the pressure applied to the powder in all directions is uniform and consistent, so that the powder is formed more compactly and uniformly, and the method comprises the following steps:

1) preparing materials: carrying out spray hydration and natural drying treatment on the regenerated granules of the waste magnesia carbon bricks with the granularity of more than 0.074mm and less than 1mm, grinding the regenerated granules into fine sintered magnesia powder with the granularity of less than or equal to 0.074 by using a ball mill, weighing the materials according to the mixture ratio, and taking the main materials as follows: 76-84 wt% of sintered magnesia which is formed by mixing more than or equal to 1mm and less than or equal to 3mm in particle size, more than 0.074mm and less than or equal to 0.074mm in particle size.

Auxiliary materials: 11.5-16 wt% of flake graphite

Antioxidant: 2-5 wt% of one or a mixture of aluminum powder, silicon powder and silicon carbide powder

Binding agent: 3.5-4.0 wt% of phenolic resin.

2) Mixing: preheating a mixing roll to 40-50 ℃,

adding sintered magnesia with the granularity being less than or equal to 1mm and less than or equal to 3mm when the mixer is in low speed, and the granularity being less than 1mm when the mixer is in 0.074mm,

dry-mixing for 1-2 min, adding phenolic resin,

wet mixing for 2-3 min, adding flake graphite,

adding an antioxidant and sintered magnesia with the granularity less than or equal to 0.074mm after wet mixing for 2-3 minutes,

wet mixing for 2-3 minutes, high-speed mixing for 10-15 minutes,

discharging;

the temperature of the pug is less than 70 ℃ in the mixing process;

4) naturally drying and baking:

forming the green body, naturally drying for 8-16 hours, then baking in a kiln,

heating to 140-160 ℃ from room temperature at a heating rate of 10 ℃/h, and preserving heat for 4-8 hours;

then heating to 200-220 ℃ at a heating rate of 10 ℃/h, and preserving heat for 16-24 hours;

stopping fire, naturally cooling to room temperature, taking out of the kiln, and finishing the preparation of the lower part of the sleeve core, wherein the compressive strength of the sleeve core is more than or equal to 40 MPa.

The regenerated magnesia-carbon coating material is prepared by processing and processing waste magnesia-carbon bricks, and has the particle size of less than or equal to 1mm and less than or equal to 3mm, and the particle size of less than 0.074mm<The coating is prepared from 1mm of regenerated magnesia carbon granules, sintered magnesia fine powder with the granularity of less than or equal to 0.074mm, soft clay, silica micropowder, sodium tripolyphosphate and the like according to a certain proportion, wherein the regenerated magnesia carbon granules are 60-70 wt%, the MgO content is more than or equal to 65 wt%, and the bulk density is more than or equal to 1.87g/cm³。

The effect provided in the summary of the invention is only the effect of the embodiment, not all the effects of the invention, and one of the above technical solutions has the following advantages or beneficial effects:

1. the upper part and the lower part of the sleeve core of the combined special-shaped blank continuous casting tundish turbulence controller are integrally designed and formed in a split mode, an inner cavity in the upper part of the sleeve core is in a circular truncated cone shape with a small upper bottom surface and a large lower bottom surface, the diameter d1 of the upper bottom surface of an outer circular truncated cone is 350-400 mm, and the diameter d2 of the lower bottom surface of the outer circular truncated cone is 420-470 mm; the inner cavity bottom of the lower part of the sleeve core is an arc curved surface, the arc radius R of the circumferential edge is 82-102 mm, four conical convex structures are uniformly distributed on the circumference of the circle with the diameter phi of the circle bottom surface of the inner cavity being 130-150 mm, the diameter d of the circle bottom surface of the four conical convex structures is 70-80 mm, the height h of the four conical convex structures is 70-80 mm, and the like, and the design is obtained by numerical simulation research and application test verification by taking a special-shaped blank continuous casting tundish as a research object by technical personnel in the field, the design has direct influence on the flowing state of molten steel in the middle, the inner cavity bottom of the sleeve core of the special-shaped blank continuous casting tundish turbulence controller designed by the invention is the arc curved surface, the conical convex structures are arranged, and the inner cavity side wall of the,the pouring flows of the large ladle are sputtered in different directions in the inner cavity of the sleeve core of the turbulence controller and collide with each other to dissipate most of kinetic energy, the degree of turbulent flow formed by molten steel is weakened, liquid level fluctuation caused by strong turbulence and slag entrapment caused by liquid level eddy are inhibited, and numerical simulation calculation results show that the central section steel flow turbulence kinetic energy of the tundish of the special-shaped blank continuous casting tundish current stabilizer with the inner cavity of the straight cylinder type CN104707956B is 1.46m²s²，1.87m²s²The oxygen content in the molten steel in the crystallizer is reduced by more than 15 percent in the same ratio, and the problem of slag entrapment caused by injection flow in an impact zone is effectively solved.

2. The sleeve core is prepared from materials with waste magnesia carbon brick regenerated particles as main raw materials, is obtained through a large number of research experiments and performance test verification, and has the following beneficial effects: on the premise of ensuring that the performance is not reduced, the amount of the waste magnesia carbon brick regenerated particles replacing magnesia reaches 60-66%, so that the raw material cost of the special-shaped blank continuous casting tundish turbulence controller is reduced by more than 50% in comparison with that of the special-shaped blank continuous casting tundish current stabilizer of CN 104707956B. The upper part of the sleeve core of the combined special-shaped blank continuous casting tundish turbulence controller is composed of materials taking waste magnesia carbon brick regenerated particles as main raw materials, the amount of the waste magnesia carbon brick regenerated particles replacing magnesia reaches 60-66%, and the combined special-shaped blank continuous casting tundish turbulence controller is prepared by an isostatic pressing method, so that the combined special-shaped blank continuous casting tundish turbulence controller has the beneficial effects that: the forming quality is high, the overall performance is good, the production cost is low, the problems that the CN104707956B that the arc-shaped magnesia carbon brick is adopted for annular masonry of the flow stabilizer sleeve core of the beam blank continuous casting tundish is poor in overall performance, high in production cost and asynchronous in service life with the service life of the tundish working lining are solved, the service life is prolonged to 35-38 hours from 31-35 hours at the same time, and the production cost is reduced by more than 16% at the same time.

3. The lower part of the sleeve core of the combined type special-shaped blank continuous casting tundish turbulence controller is prepared by an isostatic pressing forming method by taking sintered magnesia as a main raw material, so that the forming quality and the overall performance of the arc curved surface and the conical convex structure of the inner cavity bottom of the lower part of the sleeve core are improved, and the requirements of metallurgy functionalization and long service life are met.

Drawings

FIG. 1 is a front view of the combined slab continuous casting tundish turbulence controller of the present invention;

FIG. 2 is a top view of a mantle core structure of the assembled slab continuous casting tundish of the present invention;

in the figure, a shell 1, a sleeve core upper part 2, a sleeve core lower part 3, a combination seam 4 and a bulge structure 5.

Detailed Description

In order to clearly explain the technical features of the present invention, the following detailed description of the present invention is provided with reference to the accompanying drawings. The following disclosure provides many different embodiments, or examples, for implementing different features of the invention. To simplify the disclosure of the present invention, the components and arrangements of specific examples are described below. Furthermore, the present invention may repeat reference numerals and/or letters in the various examples. This repetition is for the purpose of simplicity and clarity and does not in itself dictate a relationship between the various embodiments and/or configurations discussed. It should be noted that the components illustrated in the figures are not necessarily drawn to scale. Descriptions of well-known components and processing techniques and procedures are omitted so as to not unnecessarily limit the invention.

The waste magnesia carbon brick refers to a waste magnesia carbon brick used for working linings of refining ladles, steelmaking converters and electric furnaces, and the MgO content is more than or equal to 76 wt%.

The isostatic pressing forming method is a forming method in which the pug is subjected to equal hydrostatic pressure in all directions, liquid is used as a pressure transmission medium, the pug is loaded into an elastic die, and pressure is applied in a high-pressure cylinder for forming. The isostatic pressing machine consists of a high-pressure container and a high-pressure oil pump. The high pressure vessel is made of high-grade alloy steel and has a certain thickness to withstand a great pressure. The size of the container is selected according to the size of the molded article. The liquid medium in the high-pressure container can be oil, water or glycerin, generally brake oil or anhydrous glycerin, and the compressibility of the two liquids is extremely small, so that almost all pressure can be transmitted to the elastic die.

The following examples are intended to further illustrate the invention, but the invention is not limited thereto. The magnesia castable and the regenerated magnesia carbon coating used in the embodiment are produced by adopting the prior art, the used regenerated granules of the waste magnesia carbon brick refer to granules with the granularity being less than or equal to 3mm and less than or equal to 5mm, granules with the granularity being less than or equal to 1mm and less than or equal to 3mm, granules with the granularity being less than or equal to 1mm and granules with the granularity being less than or equal to 0.074mm which are obtained after processing treatment such as slag layer removal, sorting, magnetic separation, crushing, wheel milling and the like and classified screening of the waste magnesia carbon brick, then the regenerated granules of the waste magnesia carbon brick with the granularity being less than or equal to 1mm and 0.074mm are subjected to hydration and natural drying treatment, and the waste magnesia carbon brick fine powder with the granularity being less than or equal to 0.074 is ground by adopting a ball mill. Other raw materials are all commercial products:

Example 1:

as shown in fig. 1 and 2, a combined type special-shaped blank continuous casting tundish turbulence controller is formed by combining a shell 1, a sleeve core upper part 2 and a sleeve core lower part 3, wherein the sleeve core upper part 2 and the sleeve core lower part 3 are integrally designed and formed in a split mode and are positioned on the bottom surface of an inner cavity of the shell 1 from top to bottom, the longitudinal center lines of the upper part 2 and the lower part 3 of the sleeve core are coincident with the longitudinal center line of the inner cavity of the shell 1, a joint seam 4 is arranged between the shell 1 and the upper part 2 and the lower part 3 of the sleeve core, the shape of the inner cavity formed by combining the upper part 2 and the lower part 3 of the sleeve core is verified and designed based on numerical simulation research and application test, the bottom of the inner cavity of the lower part 3 of the sleeve core is provided with four conical protruding structures 5, the upper part 2 of the sleeve core is prepared by an isostatic pressing method by adopting waste magnesia carbon brick regenerated particles as main raw materials, and the lower part 3 of the sleeve core is prepared by the isostatic pressing method.

The appearance of the upper portion 2 of the sleeve core of the turbulence controller is in a circular truncated cone shape with a large upper bottom surface and a small lower bottom surface, the height a of the outer circular truncated cone is 288mm, the diameter D1 of the upper bottom surface of the outer circular truncated cone is 700mm, the diameter D2 of the lower bottom surface of the outer circular truncated cone is 600mm, the inner cavity of the upper portion 2 of the sleeve core is in a circular truncated cone shape with a small upper bottom surface and a large lower bottom surface, the diameter D1 of the upper bottom surface of the inner circular truncated cone is 400mm, and the diameter D2 of the lower bottom surface of the inner circular truncated.

The appearance of turbulence controller's cover core lower part 3 is that the bottom surface is big, the round platform shape that the bottom surface is little down, and its round platform height b is 202mm, and the last bottom surface circle diameter D2 of outer round platform is 600mm, and the lower bottom surface circle diameter D3 of outer round platform is 525mm, and the inner chamber bottom of cover core lower part 3 is circular arc curved surface, and the circular arc radius R of circumference is 102mm, and four protruding structures 5 of evenly distributed on the circular circumference that inner chamber bottom circle diameter phi is 150mm, and the thickness c at circular plane position is 100 mm. The diameter d of the bottom surface circle of the conical protruding structure is 80mm, and the height h of the conical protruding structure is 80 mm.

The width of the joint seam 4 is large at the upper part and small at the lower part, the width m of the upper part is 15mm, and the width n of the lower part is 10 mm.

The shape and the size of the shell 1 are designed according to the shape and the size of a work lining impact area of a continuous casting tundish of a special-shaped blank, and the shell is prepared by casting and molding a magnesium spinel castable produced by the prior art, naturally maintaining and baking in a heating furnace.

The upper part 2 of the sleeve core is prepared by an isostatic pressing forming method, takes the waste magnesia carbon brick regenerated particles as main raw materials, and consists of the following materials in percentage by weight: 24% of waste magnesia carbon brick regenerated particles with the granularity being less than or equal to 3mm, 32% of waste magnesia carbon brick regenerated particles with the granularity being less than or equal to 1mm, 10% of waste magnesia carbon brick regenerated fine powder with the granularity being less than or equal to 0.074mm, 15% of sintered magnesia with the granularity being less than or equal to 0.074mm, 5% of sintered magnesia with the granularity being less than or equal to 0.074mm, 7% of flake graphite, 4% of aluminum powder and 4% of phenolic resin.

The upper part 2 of the sleeve core is prepared by an isostatic pressing forming method, and the method comprises the following steps:

1) preparing materials: weighing the raw materials according to the proportion;

2) mixing: preheating a mixing roll to 40 ℃, adding sintered magnesia with the granularity being less than or equal to 3mm and less than or equal to 5mm and the granularity being less than or equal to 1mm when the mixing roll is at a low speed, adding phenolic resin after dry mixing for 1 minute, adding crystalline flake graphite after wet mixing for 3 minutes, adding fine powder with the granularity being less than or equal to 0.074mm and an antioxidant after wet mixing for 2 minutes, wet mixing for 3 minutes, mixing at a high speed for 10 minutes, discharging, wherein the temperature of pug in the mixing process is less than 70 ℃;

3) green body forming: filling the mud into a mold, then removing air in the mold, pressing and molding under the pressure of 200MPa by equal static pressure, and then discharging the mold, thus completing green body molding;

4) storing the green compact at room temperature for 4 hours, then placing the green compact into a kiln for baking, wherein ① the temperature is uniformly and continuously raised from the room temperature to 70 ℃, the temperature is kept for 16 hours after the temperature is raised for 8 hours, ② the temperature is uniformly and continuously raised from 70 ℃ to 140 ℃, the temperature is kept for 8 hours after the temperature is raised for 4 hours, ② the temperature is uniformly and continuously raised from 140 ℃ to 190 ℃, the temperature is kept for 16 hours after the temperature is raised for 8 hours, the green compact is taken out of the kiln after natural cooling, and the preparation of the sleeve core 2 is finished.

The lower part 3 of the sleeve core is prepared by an isostatic pressing forming method and is prepared from the following raw materials in percentage by weight:

main materials: 84 wt% of sintered magnesia which is mixed by the particle size of less than or equal to 1mm and less than or equal to 3mm, the particle size of less than or equal to 0.074mm and the particle size of less than or equal to 0.074mm

Auxiliary materials: flake graphite 10.5 wt%

Antioxidant: 2.0 wt% of aluminum powder

Binding agent: 3.5 wt% of phenolic resin.

The lower part 3 of the sleeve core is prepared by an isostatic pressing forming method, which comprises the following steps:

1) preparing materials: weighing the raw materials according to the proportion;

2) mixing: preheating a mixing roll to 40 ℃, adding sintered magnesia with the granularity being less than or equal to 1mm and less than or equal to 3mm and the granularity being less than or equal to 1mm when the mixing roll is at a low speed, adding phenolic resin after dry mixing for 1 minute, adding crystalline flake graphite after wet mixing for 3 minutes, adding sintered magnesia with the granularity being less than or equal to 0.074mm and an antioxidant after wet mixing for 2 minutes, wet mixing for 3 minutes, high-speed mixing for 10 minutes, discharging, wherein the temperature of a pug in the mixing process is less than 70 ℃;

4) and (3) naturally drying and baking, namely naturally drying the formed green body for 8 hours, then putting the green body into a kiln for baking, ① raising the temperature from room temperature to 140 ℃ at a heating rate of 10 ℃/h, preserving the heat for 4 hours, ② raising the temperature from 10 ℃/h to 200 ℃, preserving the heat for 16 hours, ③ stopping heating, naturally cooling the green body to room temperature, then taking the green body out of the kiln, and completing the preparation of the lower part 3 of the sleeve core, wherein the compressive strength of the lower part is more than or equal to 40 MPa.

A preparation method of a combined type special-shaped blank continuous casting tundish turbulence controller comprises the following steps: the lower part 3 and the upper part 2 of the sleeve core are sleeved in the shell 1 of the turbulence controller from bottom to top in sequence, the longitudinal central lines of the lower part 3 and the upper part 2 of the sleeve core are ensured to be coincident with the longitudinal central line of the inner cavity of the shell 1, the joint seam 4 between the shell 1 and the lower part 3 and the upper part 2 of the sleeve core is filled with sintered magnesia with the granularity of less than or equal to 1mm, a layer of regenerated magnesia carbon coating material with the thickness of 35mm is coated on the outer surface of the sintered magnesia carbon coating material, the natural maintenance is carried out for 2 days, and the preparation of the combined special-shaped blank tundish turbulence controller is completed.

Example 2:

as described in example 1, except that:

the height a of the circular truncated cone of the upper portion 2 of the sleeve core of the turbulence controller is 258mm, the diameter D1 of the upper bottom surface of the outer circular truncated cone is 650mm, the diameter D2 of the lower bottom surface of the outer circular truncated cone is 550mm, the diameter D1 of the upper bottom surface of the inner circular truncated cone of the inner cavity of the upper portion 2 of the sleeve core is 350mm, and the diameter D2 of the lower bottom surface of the inner circular truncated cone is 420 mm.

The outer round platform height b of turbulence controller's cover core lower part 3 is 172mm, and the last bottom surface circle diameter D2 of outer round platform is 550mm, and the lower bottom surface circle diameter D3 of outer round platform is 475mm, and the peripheral circular arc radius R of the inner chamber base circle of cover core lower part 3 is 82mm, four protruding structures 5 of evenly distributed on the circle circumference that inner chamber base circle diameter phi is 130mm, and the thickness c at circle plane position is 90 mm. The diameter d of the bottom surface circle of the conical protruding structure is 70mm, and the height h of the conical protruding structure is 70 mm.

The upper width m of the joint seam 4 is 10mm, and the lower width n is 5 mm.

The upper part 2 of the sleeve core is prepared by an isostatic pressing forming method, takes the waste magnesia carbon brick regenerated particles as main raw materials, and consists of the following materials in percentage by weight: 20% of waste magnesia carbon brick regenerated particles with the granularity being less than or equal to 3mm, 28% of waste magnesia carbon brick regenerated particles with the granularity being less than or equal to 1mm, 12% of waste magnesia carbon brick regenerated fine powder with the granularity being less than or equal to 0.074mm, 12% of sintered magnesia with the granularity being less than or equal to 0.074mm, 9% of sintered magnesia with the granularity being less than or equal to 0.074mm, 10% of crystalline flake graphite, 4.5% of silicon powder and 4.5% of phenolic resin.

1) preparing materials: weighing the raw materials according to the proportion;

2) mixing: preheating a mixing roll to 50 ℃, adding sintered magnesia with the granularity being less than or equal to 3mm and less than or equal to 5mm and the granularity being less than or equal to 1mm when the mixing roll is at a low speed, adding phenolic resin after dry mixing for 2 minutes, adding crystalline flake graphite after wet mixing for 2 minutes, adding fine powder with the granularity being less than or equal to 0.074mm and an antioxidant after wet mixing for 3 minutes, wet mixing for 2 minutes, mixing at a high speed for 15 minutes, discharging, wherein the temperature of pug in the mixing process is less than 70 ℃;

3) green body forming: filling the mud into a mold, then removing air in the mold, pressing and molding under 250MPa by isostatic pressure, and then discharging the mold, thus completing green body molding;

4) storing the green body for 8 hours at room temperature, then placing the green body into a kiln for baking, wherein ① the temperature is uniformly and continuously raised from the room temperature to 90 ℃, the temperature is kept for 8 hours after the temperature is raised for 16 hours, ② the temperature is uniformly and continuously raised from 90 ℃ to 160 ℃, the temperature is kept for 4 hours after the temperature is raised for 8 hours, ② the temperature is uniformly and continuously raised from 160 ℃ to 210 ℃, the temperature is kept for 8 hours after the temperature is raised for 16 hours, the green body is taken out of the kiln after natural cooling, and the preparation of the sleeve core 2 is finished.

4) And (3) naturally drying and baking, namely naturally drying the formed green body for 16 hours, then putting the green body into a kiln for baking, ① raising the temperature from room temperature to 160 ℃ at a heating rate of 10 ℃/h, preserving the heat for 4 hours, ② raising the temperature from 10 ℃/h to 220 ℃ at a heating rate of 16 hours, ③ stopping heating, naturally cooling the green body to room temperature, taking the green body out of the kiln, and finishing the preparation of the lower part 3 of the sleeve core, wherein the compressive strength of the green body is more than or equal to 40 MPa.

main materials: 76 wt% of sintered magnesia which is mixed by the particle size of less than or equal to 1mm and less than or equal to 3mm, the particle size of less than or equal to 0.074mm and the particle size of less than or equal to 0.074mm

Auxiliary materials: 16 wt% of flake graphite

Antioxidant: 2 wt% of silicon powder and 2 wt% of silicon carbide powder

Binding agent: 4.0 wt% of phenolic resin.

1) preparing materials: weighing the raw materials according to the proportion;

2) mixing: preheating a mixing roll to 50 ℃, adding sintered magnesia with the granularity being less than or equal to 1mm and less than or equal to 3mm and the granularity being less than or equal to 1mm when the mixing roll is at a low speed, adding phenolic resin after dry mixing for 2 minutes, adding crystalline flake graphite after wet mixing for 2 minutes, adding sintered magnesia with the granularity being less than or equal to 0.074mm and an antioxidant after wet mixing for 3 minutes, wet mixing for 2 minutes, mixing at a high speed for 15 minutes, discharging, wherein the temperature of a pug in the mixing process is less than 70 ℃;

4) and (3) naturally drying and baking, namely naturally drying the formed green body for 16 hours, then putting the green body into a kiln for baking, heating ① from room temperature to 160 ℃ at a heating rate of 10 ℃/h, preserving heat for 8 hours, heating ② from 10 ℃/h to 220 ℃, preserving heat for 24 hours, stopping heating ③, naturally cooling to room temperature, taking the green body out of the kiln, and finishing the preparation of the lower part 3 of the sleeve core, wherein the compressive strength is more than or equal to 40 MPa.

A preparation method of a combined type special-shaped blank continuous casting tundish turbulence controller comprises the following steps: the lower part 3 and the upper part 2 of the sleeve core are sleeved in the shell 1 of the turbulence controller from bottom to top in sequence, the longitudinal center lines of the lower part 3 and the upper part 2 of the sleeve core are ensured to be coincident with the longitudinal center line of the inner cavity of the shell 1, the joint seam 4 between the shell 1 and the lower part 3 and the upper part 2 of the sleeve core is filled with sintered magnesia with the granularity of less than or equal to 1mm, a layer of regenerated magnesia carbon coating material with the thickness of 25mm is coated on the outer surface of the shell, the shell is naturally maintained for 1 day, and the preparation of the combined special-shaped blank tundish turbulence controller is finished.

Example 3:

as described in example 1, except that:

the height a of an outer circular table of the upper portion 2 of the sleeve core of the turbulence controller is 270mm, the diameter D1 of an upper bottom surface of the outer circular table is 670mm, the diameter D2 of a lower bottom surface of the outer circular table is 570mm, the diameter D1 of an upper bottom surface of an inner circular table of the inner cavity of the upper portion 2 of the sleeve core is 370mm, and the diameter D2 of a lower bottom surface of the inner circular table is 450 mm.

The height b of the circular truncated cone of the sleeve core lower part 3 of the turbulence controller is 192mm, the diameter D2 of the upper bottom surface circle of the outer circular truncated cone is 570mm, the diameter D3 of the lower bottom surface circle of the outer circular truncated cone is 550mm, the circular arc radius R of the periphery of the inner cavity bottom circle of the sleeve core lower part 3 is 92mm, four protruding structures 5 are uniformly distributed on the circular circumference with the diameter phi of the inner cavity bottom circle being 140mm, and the thickness c of the circular plane part is 95 mm. The diameter d of the bottom surface circle of the conical protruding structure is 75mm, and the height h is 75 mm.

The upper width m of the joint seam 4 is 10mm, and the lower width n is 5 mm.

The upper part 2 of the sleeve core is prepared by an isostatic pressing forming method, takes the waste magnesia carbon brick regenerated particles as main raw materials, and consists of the following materials in percentage by weight: 21% of waste magnesia carbon brick regenerated particles with the particle size less than or equal to 3mm, 30% of waste magnesia carbon brick regenerated particles with the particle size less than or equal to 3mm, 14% of waste magnesia carbon brick regenerated fine powder with the particle size less than or equal to 0.074mm, 10% of sintered magnesia with the particle size less than or equal to 1mm, 7% of sintered magnesia with the particle size less than or equal to 0.074mm, 8.5% of crystalline flake graphite, 3% of silicon powder, 3% of silicon carbide powder and 4% of phenolic resin.

1) preparing materials: weighing the raw materials according to the proportion;

2) mixing: preheating a mixing roll to 45 ℃, adding sintered magnesia with the granularity being less than or equal to 3mm and less than or equal to 5mm and the granularity being less than or equal to 1mm when the mixing roll is at a low speed, adding phenolic resin after dry mixing for 2 minutes, adding crystalline flake graphite after wet mixing for 3 minutes, adding fine powder with the granularity being less than or equal to 0.074mm and an antioxidant after wet mixing for 2 minutes, wet mixing for 3 minutes, mixing at a high speed for 12 minutes, discharging, wherein the temperature of pug in the mixing process is less than 70 ℃;

4) storing the green body at room temperature for 6 hours, then placing the green body into a kiln for baking, wherein ① the temperature is uniformly and continuously raised from the room temperature to 80 ℃, the temperature is raised and the heat is preserved for 12 hours respectively, ② the temperature is uniformly and continuously raised from 80 ℃ to 150 ℃, the temperature is raised and the heat is preserved for 6 hours respectively, ② the temperature is uniformly and continuously raised from 150 ℃ to 200 ℃, the temperature is raised and the heat is preserved for 12 hours respectively, taking the green body out of the kiln after natural cooling, and finally completing the preparation of the sleeve core 2, wherein the compressive.

4) And (3) naturally drying and baking, namely naturally drying the formed green body for 12 hours, then putting the green body into a kiln for baking, ① raising the temperature from room temperature to 150 ℃ at a heating rate of 10 ℃/h, keeping the temperature for 6 hours, ② raising the temperature from 10 ℃/h to 210 ℃, keeping the temperature for 20 hours, ③ stopping heating, naturally cooling the green body to room temperature, then taking the green body out of the kiln, and completing the preparation of the lower part 3 of the sleeve core, wherein the compressive strength of the lower part is more than or equal to 40 MPa.

main materials: 79 wt% of sintered magnesia which is mixed by the particle size of less than or equal to 1mm and less than or equal to 3mm, the particle size of less than or equal to 0.074mm and the particle size of less than or equal to 0.074mm

Auxiliary materials: flake graphite 14 wt%

Antioxidant: 3.3 wt% of aluminum-magnesium alloy powder

Binding agent: 3.7 wt% of phenolic resin.

1) preparing materials: weighing the raw materials according to the proportion;

2) mixing: preheating a mixing roll to 45 ℃, adding sintered magnesia with the granularity being less than or equal to 1mm and less than or equal to 3mm and the granularity being less than or equal to 1mm when the mixing roll is at a low speed, adding phenolic resin after dry mixing for 1 minute, adding crystalline flake graphite after wet mixing for 3 minutes, adding sintered magnesia with the granularity being less than or equal to 0.074mm and an antioxidant after wet mixing for 3 minutes, wet mixing for 2 minutes, mixing at a high speed for 10 minutes, discharging, wherein the temperature of a pug in the mixing process is less than 70 ℃;

3) green body forming: filling the mud into a mold, then removing air in the mold, pressing and molding under 220MPa by isostatic pressure, and then discharging the mold, thus completing green body molding;

A preparation method of a combined type special-shaped blank continuous casting tundish turbulence controller comprises the following steps: the lower part 3 and the upper part 2 of the sleeve core are sleeved in the shell 1 of the turbulence controller from bottom to top in sequence, the longitudinal center lines of the lower part 3 and the upper part 2 of the sleeve core are ensured to be coincident with the longitudinal center line of the inner cavity of the shell 1, the joint seam 4 between the shell 1 and the lower part 3 and the upper part 2 of the sleeve core is filled with sintered magnesia with the granularity of less than or equal to 1mm, a layer of regenerated magnesia carbon coating material with the thickness of 30mm is coated on the outer surface of the shell, the shell is naturally maintained for 2 days, and the preparation of the combined special-shaped blank tundish turbulence controller is finished.

Comparative example 1: CN104707956B discloses a tundish turbulence controller for continuous casting of a beam blank and a mounting method thereof, comprising a shell, a bottom plate, a sleeve core and a pressure ring, wherein the shell is of a cavity structure with an opening at the upper end, the bottom plate is positioned on the bottom of the cavity of the shell, the bottom end of the sleeve core is positioned on the bottom plate, the pressure ring is arranged at the upper end of the sleeve core and positioned in the cavity of the shell, expansion gaps are arranged between the bottom of the cavity of the shell and the bottom plate, and between the inner wall of the shell and the sleeve core, and the pressure ring is arranged above the sleeve core, so that the problem that magnesia carbon bricks on; when the turbulence controller is installed, a plurality of pressing bricks are arranged on the same circumference in the same plane above the pressing ring, so that the problem of overall floating of the turbulence controller is solved.

Examples 1 to 3 of the present invention and a reference CN104707956B disclose a structural material, a service life, a slag entrapment in a tundish injection impact area, and a total oxygen content in molten steel in a mold (a reference test steel type Q355B, a gas sample is taken from the mold, and an oxygen content is detected), the oxygen content in steel is a sum of dissolved oxygen and a non-metal oxide inclusion, and since the dissolved oxygen content is not large, it is generally considered that the non-metal oxide inclusion oxygen content in steel is a total oxygen content, i.e., the total oxygen content in steel is high or low and represents a control level of oxide inclusions in steel), which are compared in the application of a special-shaped billet continuous casting tundish of the limited leuwen group of steels, as shown in table 1 below:

comparison of the application of the beam blank continuous casting tundish of the Laiwu iron group Yinshan type Steel Co., Ltd. is shown in the following table:

through the comparison of the data in the table, the service life of the combined special-shaped blank continuous casting tundish turbulence controller prepared by the invention is improved by more than 4 hours compared with the special-shaped blank continuous casting tundish turbulence controller in the prior patent CN104707956B, the content of total oxygen in molten steel in a crystallizer is reduced by more than 15 percent in an identical ratio, the production cost is reduced by more than 16 percent in an identical ratio, and the problem of injection slag entrapment in a tundish impact area is effectively solved.

Although the embodiments of the present invention have been described with reference to the accompanying drawings, the scope of the present invention is not limited thereto, and various modifications and variations which do not require inventive efforts and which are made by those skilled in the art are within the scope of the present invention.

Claims

1. The utility model provides a package turbulence controller in middle of modular dysmorphism base continuous casting, includes shell (1) and cover core, the cover core set up in the inner chamber of shell, a serial communication port, cover core upper portion (2), cover core lower part (3) including the upper and lower cover core that sets up, cover core lower part (3) set up on the bottom surface of shell (1) inner chamber, and the coincidence of the longitudinal centerline of cover core upper portion (2) and cover core lower part (3) and shell (1) inner chamber, be equipped with joint seam (4) between the lateral wall of shell (1) and cover core, the bottom of the inner chamber of cover core is equipped with a plurality of conical protruding structure (5), protruding structure (5) array distribution on the circle that uses the longitudinal centerline of cover core lower part (3) as the axle center.

2. The combined type billet continuous casting tundish turbulence controller of claim 1, wherein the inner cavity of the upper part (2) of the sleeve core is in a circular truncated cone shape with a small inner diameter at the upper part and a large inner cavity at the lower part, the bottom surface of the inner cavity of the lower part (3) of the sleeve core is a circular arc curved surface, and the side wall and the bottom surface of the inner cavity of the lower part (3) of the sleeve core are transited through a circular arc chamfer.

3. A combined type billet continuous casting tundish turbulence controller according to claim 2, characterized in that the upper portion (2) of the sleeve core is shaped like a circular truncated cone with a large upper bottom surface and a small lower bottom surface, and the lower portion (3) of the sleeve core is shaped like a circular truncated cone with a large upper bottom surface and a small lower bottom surface.

4. A combined beam blank continuous casting tundish turbulence controller as claimed in claim 1, 2 or 3, characterized in that the number of the projection structures (5) is four.

5. The combined type continuous billet casting tundish turbulence controller according to claim 3, wherein the height a of the upper portion (2) of the sleeve core is 258 to 288mm, the outer diameter D1 of the upper bottom surface of the upper portion (2) of the sleeve core is 650 to 700mm, the inner diameter D1 of the upper bottom surface of the upper portion (2) of the sleeve core is 350 to 400mm, the outer diameter D2 of the lower bottom surface of the upper portion (2) of the sleeve core is 550 to 600mm, the inner diameter D2 of the lower bottom surface of the upper portion (2) of the sleeve core is 420 to 470mm, the height b of the lower portion (3) of the sleeve core is 172 to 202mm, the outer diameter D2 of the upper bottom surface of the lower portion (3) of the sleeve core is 550 to 600mm, the outer diameter D3 of the lower portion (3) of the sleeve core is 475 to 525mm, the radius R of the circular arc chamfer of the lower portion (3) of the sleeve core is 82 to 102mm, the thickness c of the bottom surface of the lower portion (3) of the lower portion of the sleeve core is 90 to 100mm, and the inner diameter of the, the outer diameter of the upper bottom surface of the lower part (3) of the sleeve core is the same as that of the lower bottom surface of the upper part (2) of the sleeve core.

6. The combined type beam blank continuous casting tundish turbulence controller according to claim 5, wherein the protrusion structures (5) are uniformly distributed on a circle with the diameter phi of 130-150 mm at the bottom surface of the inner cavity, the diameter d of the circle at the bottom surface of the conical protrusion structure is 70-80 mm, and the height h is 70-80 mm.

7. A preparation method of a combined type special-shaped blank continuous casting tundish turbulence controller is characterized by comprising the following steps:

s1: the lower part (3) and the upper part (2) of the sleeve core are sleeved in the shell (1) of the turbulence controller from bottom to top in sequence, so that the longitudinal center lines of the lower part (3) and the upper part (2) of the sleeve core are ensured to be superposed with the longitudinal center line of the inner cavity of the shell (1);

s2: the joint seam (4) between the shell (1) and the sleeve core is filled with sintered magnesia with the granularity less than or equal to 1 mm;

s3: coating a layer of regenerated magnesia carbon coating material with the thickness of 25-35 mm on the outer surface of the sintered magnesia filled in the joint seam, wherein the regenerated magnesia carbon coating material is processed by adopting waste magnesia carbon bricks, and the particle size of the regenerated magnesia carbon coating material is less than or equal to 1mm and less than or equal to 3mm, and the particle size of the regenerated magnesia carbon coating material is less than or equal to 0.074mm and less than or equal to 0.074mm<The coating is prepared from 1mm of regenerated magnesia carbon granules, and sintered magnesia fine powder with the granularity of less than or equal to 0.074mm, soft clay, silica micropowder and sodium tripolyphosphate, wherein the regenerated magnesia carbon granules are 60-70 wt%, the MgO content is more than or equal to 65 wt%, and the bulk density is more than or equal to 1.87g/cm³；

S4: and (5) naturally curing for 1-2 days, and completing the preparation of the combined special-shaped blank continuous casting tundish turbulence controller.

8. The manufacturing method of a combined beam blank continuous casting tundish turbulence controller according to claim 7, wherein the upper sleeve core portion (2) is manufactured by isostatic pressing, comprising the steps of:

1) preparing materials:

preparing fine sintered magnesia powder: carrying out spray hydration and natural drying treatment on the regenerated granules of the waste magnesia carbon bricks with the granularity of less than 1mm and less than 0.074mm, grinding the regenerated granules into fine sintered magnesia powder with the granularity of less than or equal to 0.074 by using a ball mill,

weighing the materials according to the proportion;

2) mixing:

preheating a mixing roll to 40-50 ℃,

dry-mixing for 1-2 min, adding phenolic resin,

wet mixing for 2-3 min, adding flake graphite,

wet mixing for 2-3 minutes, high-speed mixing for 10-15 minutes,

discharging;

the temperature of the pug is less than 70 ℃ in the mixing process;

stopping fire, naturally cooling, and taking out of the kiln to finish the preparation of the upper part (2) of the sleeve core.

9. The manufacturing method of a combined beam blank continuous casting tundish turbulence controller according to claim 7 or 8, characterized in that the lower sleeve core part (3) is manufactured by isostatic pressing, comprising the following steps:

1) preparing materials: weighing the materials according to the proportion;

2) mixing: preheating a mixing roll to 40-50 ℃,

dry-mixing for 1-2 min, adding phenolic resin,

wet mixing for 2-3 min, adding flake graphite,

wet mixing for 2-3 minutes, high-speed mixing for 10-15 minutes,

discharging;

the temperature of the pug is less than 70 ℃ in the mixing process;

4) naturally drying and baking:

forming the green body, naturally drying for 8-16 hours, then baking in a kiln,

stopping the fire, naturally cooling to room temperature, taking out of the kiln, and finishing the preparation of the lower part (3) of the sleeve core.