CN110653366A - Continuous casting tundish belt buffering ball cyclone type turbulence suppressor - Google Patents
Continuous casting tundish belt buffering ball cyclone type turbulence suppressor Download PDFInfo
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- 238000009749 continuous casting Methods 0.000 title claims abstract description 29
- 230000003139 buffering effect Effects 0.000 title abstract description 6
- 239000000203 mixture Substances 0.000 claims abstract description 3
- 239000011819 refractory material Substances 0.000 claims description 14
- 239000007787 solid Substances 0.000 claims description 7
- 229910000831 Steel Inorganic materials 0.000 abstract description 60
- 239000010959 steel Substances 0.000 abstract description 60
- 238000005266 casting Methods 0.000 abstract description 17
- 239000012535 impurity Substances 0.000 abstract description 4
- 238000000034 method Methods 0.000 abstract description 4
- 238000009991 scouring Methods 0.000 abstract description 4
- 238000000746 purification Methods 0.000 abstract description 2
- 230000009286 beneficial effect Effects 0.000 abstract 1
- 230000005358 geomagnetic field Effects 0.000 abstract 1
- 239000007788 liquid Substances 0.000 abstract 1
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 description 8
- 239000000463 material Substances 0.000 description 5
- 230000003647 oxidation Effects 0.000 description 5
- 238000007254 oxidation reaction Methods 0.000 description 5
- 239000002893 slag Substances 0.000 description 5
- 238000003780 insertion Methods 0.000 description 4
- 230000037431 insertion Effects 0.000 description 4
- 229910001208 Crucible steel Inorganic materials 0.000 description 3
- 238000002347 injection Methods 0.000 description 3
- 239000007924 injection Substances 0.000 description 3
- 230000008646 thermal stress Effects 0.000 description 3
- 230000001174 ascending effect Effects 0.000 description 2
- 238000013461 design Methods 0.000 description 2
- 230000000694 effects Effects 0.000 description 2
- 239000004576 sand Substances 0.000 description 2
- 238000003723 Smelting Methods 0.000 description 1
- 238000004364 calculation method Methods 0.000 description 1
- 239000003795 chemical substances by application Substances 0.000 description 1
- 230000003749 cleanliness Effects 0.000 description 1
- 230000007547 defect Effects 0.000 description 1
- 238000011161 development Methods 0.000 description 1
- 238000010586 diagram Methods 0.000 description 1
- 238000005516 engineering process Methods 0.000 description 1
- 230000003628 erosive effect Effects 0.000 description 1
- 238000007667 floating Methods 0.000 description 1
- 238000011835 investigation Methods 0.000 description 1
- 239000003348 petrochemical agent Substances 0.000 description 1
- 238000005381 potential energy Methods 0.000 description 1
- 238000007670 refining Methods 0.000 description 1
- 238000005070 sampling Methods 0.000 description 1
- 238000004088 simulation Methods 0.000 description 1
- 239000000243 solution Substances 0.000 description 1
- 238000009628 steelmaking Methods 0.000 description 1
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B22—CASTING; POWDER METALLURGY
- B22D—CASTING OF METALS; CASTING OF OTHER SUBSTANCES BY THE SAME PROCESSES OR DEVICES
- B22D41/00—Casting melt-holding vessels, e.g. ladles, tundishes, cups or the like
- B22D41/50—Pouring-nozzles
- B22D41/507—Pouring-nozzles giving a rotating motion to the issuing molten metal
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B22—CASTING; POWDER METALLURGY
- B22D—CASTING OF METALS; CASTING OF OTHER SUBSTANCES BY THE SAME PROCESSES OR DEVICES
- B22D11/00—Continuous casting of metals, i.e. casting in indefinite lengths
- B22D11/10—Supplying or treating molten metal
Abstract
The invention relates to a continuous casting tundish strip buffering ball spiral-flow type turbulence suppressor, wherein an opening on a suppressor body is communicated with a cavity, the center of the bottom of the suppressor body is provided with 4 annularly arranged shallow arch-shaped three-dimensional check blocks, and the cross sections of the shallow arch-shaped three-dimensional check blocks are formed by mutually parallel circular arcs A1、A2And an elliptical arc E smoothly connected at both end points1、E2Composition is carried out; the longitudinal section of the cavity is hexagonal or octagonal, the cross section of the cavity is circular, and the space on the bottom surface of the cavity is uniformly filled with buffer balls. By adopting the invention, when the continuous casting is started, the shallow arch-shaped three-dimensional stop blocks which are annularly arranged can enable the molten steel to form a rotational flow in the direction opposite to the direction of the geomagnetic field, thereby effectively reducing the turbulent kinetic energy of the molten steel, being beneficial to the central gathering of impurities and keeping the liquid level stable; the arc-shaped side surface of the stop block is not easy to be damaged by molten steel; the buffer ball can buffer the kinetic energy of the molten steel, reduce the scouring of the molten steel on the bottom of the suppressor in the casting starting stage and adsorb various impurities in the casting starting process. In shallow bow-shaped three-dimensional fenderUnder the combined action of the block and the buffer ball, the purification degree of the molten steel is high.
Description
Technical Field
The invention relates to a novel turbulence suppressor, in particular to a tundish injection zone buffer ball rotational flow type turbulence suppressor which is suitable for the casting process of a continuous casting tundish.
Background
In recent years, high-quality steel in China is rapidly developed and widely applied to the industries of automobiles, petrochemicals, machinery, household appliances, marine equipment and electric power, and the total yield can reach 2.3 hundred million tons in 2018. As the quality requirement on high-quality steel is higher and higher, the key point for improving the quality of steel is to further reduce the level of non-metallic inclusions in the steel and reduce the fluctuation of the level of the inclusions.
With the development of continuous casting technology, a continuous casting tundish, which is used as the last reactor in the steel smelting process, plays roles in storing and distributing molten steel and removing molten steel inclusions, and the capability of improving the cleanliness of the molten steel is particularly important. Through the sampling investigation of the whole processes of steel making, refining and continuous casting, secondary oxidation and slag entrapment in the continuous casting starting stage are found to be inclusions in high-quality steel, particularly one of main sources of large inclusions, secondary inclusions and slag entrapment generated by open steel flow and collision flow often enter the deep part of a molten pool along with rushed molten steel flow quickly, a covering agent cannot be effectively captured, the number of inclusions in molten steel is increased rapidly during casting starting, the increase of large inclusions is particularly obvious, and the stability of the quality of the high-quality steel is seriously influenced. At present, the problem of sharp increase of inclusions in molten steel in a casting stage is solved in China, the number of continuous casting furnaces of high-quality steel in China is about 5, the two billets before casting are degraded and changed, the quantity of billets degraded by casting accounts for about 6 per mill of the yield of the high-quality steel according to the calculation, and the yield of the high-quality steel in China is 2.3 million tons, so that 138 million tons of high-quality steel in the casting stage is degraded and changed every year, great economic loss is brought to a steel mill, a great amount of manpower and resources are wasted, and social loss is large.
The applicant has a patent of a crescent stopper turbulence suppressor for a continuous casting tundish (publication number CN206578286U), wherein a cavity is arranged in a suppressor body, and an outlet is arranged at the upper end of the cavity; the bottom center of the suppressor body is provided with 4 crescent three-dimensional stoppers which are annularly arranged, the height of each crescent three-dimensional stopper is 1/3-4/5 of the height of the cavity, and the outer edge of the cross section consists of 4 sections of circular arcs.
Although the patent has obvious effects on buffering molten steel in the long nozzle injection zone and purifying the molten steel, the design does not completely accord with the hydrodynamic characteristics, the side surface of the crescent-shaped stop block is provided with edges, and the edges are easily damaged under the action of thermal stress due to the concentrated thermal stress after the molten steel is heated; and the stop dog is easy to damage by scouring of steel flow. The turbulence suppressor body is washed by the drainage sand and the molten steel in the casting process, so that the turbulence suppressor is corroded and damaged to generate inclusions, and secondary inclusions generated by molten steel oxidation in the casting stage and the inclusion generated by the drainage sand are involved, so that the inclusions in the continuous casting stage are still high.
Therefore, there is a need for a new type of turbulence suppressor that can capture secondary oxides and foreign inclusions in the cast steel, reduce the slag entrapment effect of the lower stream, and effectively purify the molten steel.
Disclosure of Invention
The invention aims to overcome the defects of the prior art and provides a continuous casting tundish buffer ball spiral-flow type turbulence suppressor which is simple in structure, can buffer the flow of molten steel for casting and promote inclusions to float upwards, reduces secondary oxidation and slag entrapment in the casting process and improves the quality of steel.
The purpose of the invention is realized by the rotational flow type turbulent flow suppressor of the buffer ball of the continuous casting tundish belt, wherein a cavity is arranged in the suppressor body, the space at the bottom surface of the cavity is uniformly filled with the buffer ball, and an opening at the upper end of the cavity is an opening at the upper part of the suppressor; the center of the bottom of the cavity in the suppressor body is provided with 4 annular rowsA row of three-dimensional stoppers; the 4 annularly arranged three-dimensional stop blocks are shallow arch three-dimensional stop blocks; the height of the shallow arch-shaped solid block is 20-50mm, and the cross section profile of the shallow arch-shaped solid block consists of an inner arc A and an outer arc A which are parallel to each other1、A2And an elliptical arc E smoothly connected at both end points1、E2Composition is carried out;
the longitudinal section of the cavity is hexagonal or octagonal.
According to the invention, the shallow arch-shaped three-dimensional stop blocks which are annularly arranged are arranged at the center of the bottom of the cavity, and the downward-impact potential energy of the cast steel flow is utilized to guide the flow to form an ascending rotational flow in the direction opposite to the earth rotation direction, so that the reduction of the turbulent kinetic energy of the steel flow and the central convergence of impurities are facilitated. The buffer balls uniformly filled in the bottom space of the cavity can bear the scouring of the initial casting steel flow, play roles of thermal buffering and kinetic energy buffering, reduce the erosion to the refractory material at the bottom of the cavity, reduce the splashing of the molten steel, and reduce the secondary oxidation of the molten steel and the damage to the refractory material of the suppressor at the initial casting stage; the rotational flow generated by pouring molten steel limits the buffer ball in the molten steel pouring area by using centripetal force, and large inclusions, secondary oxides and the like gathered in the center are captured by the buffer ball.
The invention has simple structure, can buffer the flow of the cast steel and promote the floating of impurities, reduces secondary oxidation and slag entrapment in the casting process and improves the quality of steel products.
Compared with the tundish crescent stopper turbulence suppressor, the arc-shaped side surface of the shallow arch-shaped three-dimensional stopper better conforms to the hydrodynamic characteristics, the thermal stress is relatively more uniform and is not easy to be destroyed by molten steel, the design of the buffer ball not only can buffer the kinetic energy of the molten steel and reduce the scouring of the molten steel to the bottom of the suppressor in the casting starting stage, but also can absorb various inclusions in the casting starting process, the purification degree of the molten steel is higher under the combined action of the shallow arch-shaped three-dimensional stopper and the buffer ball, and particularly, the removal rate of the inclusions in the molten steel obtained through simulation is improved by 33% compared with that in the continuous casting starting stage.
Drawings
FIG. 1 is a top view of the structure of the present invention;
FIG. 2 is a longitudinal cross-sectional view of the inventive structure;
FIG. 3 is a schematic view of the shallow arch stopper of the present invention:
fig. 4 is a use state diagram of the present invention.
Detailed Description
The technical solution of the present invention will be described in detail below with reference to the accompanying drawings and the detailed description.
Referring to fig. 1 and 2, a cavity 2 is arranged in a suppressor body 5 of the invention, and an outlet 1 is arranged at the upper end of the cavity; the bottom center of the cavity in the suppressor body 5 is provided with 4 shallow arch-shaped stoppers which are arranged in an annular way, and the cross section profiles of the stoppers are arc-shaped.
Referring to fig. 3, the 4 annularly arranged three-dimensional stoppers of the invention are shallow arch three-dimensional stoppers, the height of the shallow arch three-dimensional stopper 3 is 20-50mm, the cross section profile of the shallow arch three-dimensional stopper is composed of inner and outer arcs A which are parallel to each other1、A2And an elliptical arc E smoothly connected at end points A, B, C, D1、E2And (4) forming. The inner arc A1The length from the starting point A to the center O of the inner bottom surface of the suppressor is equal to R + (0.2-1) R1Wherein R is the inner radius of the long nozzle of the continuous casting tundish, R1Is the buffer ball diameter.
The inner arc A1Center of circle O of1On a perpendicular line to OA, and O1O is perpendicular to OA, the radius of the inner arc is (1.3-1.5) OA, and the central angle is 35-45 degrees. Outer arc A2Starting point B is at O1On the extension line A, the outer arc A2Center of circle O1The radius is (1.3-1.5) inner circular arc A1Radius, central angle being equal to inner arc A1The central angle.
The elliptical arc E1Respectively A, B, elliptical arc E1The long axis is AB, and the length of the short axis is 6/12-11/12 of the long axis; elliptic arc E2Respectively C, D, elliptical arc E2The minor axis is CD, and the length of the major axis is 1.3-3 times of the length of the minor axis.
Referring to figures 1 and 2, the suppressor body is cylindrical and the longitudinal section of the internal cavity 2 is hexagonal or octagonal as shown in figure 2, with a circular cross-section. The longitudinal section of the cavity is of a hexagonal or octagonal structure, so that conditions and space are provided for forming ascending rotational flow, and the buffer ball can be limited in a molten steel injection area.
The upper opening of the suppressor is a circular opening, the diameter of the opening is 3-6 times of the inner diameter of the long nozzle, and the cavity is communicated with the upper opening 1 of the suppressor. The top surface and the bottom surface of the cavity of the suppressor are parallel, the diameter of the cavity is equal to the diameter of the opening at the upper part and is the minimum diameter of the cavity, the maximum diameter of the middle part of the cavity is 1.1-1.2 times of the minimum diameter of the cavity, and the outer diameter of the suppressor body is 1.1 times of the maximum diameter of the cavity; the height of the cavity of the suppressor is 3/15-5/15 from the outlet of the long nozzle to the bottom of the tundish, the height of the upper opening is 1/5, and the thickness of the bottom of the suppressor body is 3/15-5/15 of the height of the cavity.
The bottom space of the cavity is uniformly filled with buffer balls, the diameter of the buffer balls is 10-30 mm, the buffer balls are CaO-MgO refractory material balls, and the buffer balls are converted into plastic materials after being heated by molten steel.
The bottom of the inner cavity of the suppressor body 5 and the shallow arched three-dimensional block 3 are integrally molded and made of refractory materials.
Referring to fig. 4, the invention is arranged right below a continuous casting tundish long nozzle 7, the axial lead of the invention is coincident with the axial lead of the continuous casting tundish long nozzle 7, a suppressor body 5 is embedded into a continuous casting tundish bottom 6, and the inner bottom surface of the suppressor body 5 and the inner bottom surface of the tundish are on the same plane.
The invention is described in detail below with reference to specific embodiments.
Example 1:
the depth of a molten steel pool in the middle of a certain steel plant is 1200mm, the inner diameter of a long nozzle is 100mm, the insertion depth of the long nozzle is 500mm, and the height from the outlet of the long nozzle to the inner bottom surface of a tundish is 700 mm.
The height of 4 shallow bow-shaped solid stoppers 3 arranged annularly around the center of the bottom surface is 20mm, and the bottom surface of the cavity is uniformly filled with buffer balls with the diameter of 10 mm. The suppressor body 5 is embedded in and installed at the bottom 6 of a continuous casting tundish and is positioned right below a long water gap 7 of the tundish, the axial lead of the suppressor body coincides with the axial lead of the long water gap 7, and the inner bottom surface of the suppressor body 5 and the inner bottom surface of the tundish are on the same plane.
The height of the cavity in the suppressor body 5 is 140mm, the diameter of the upper opening 1 is 300mm, and the height is 28 mm; the axial section of the cavity 2 below the opening is hexagonal or octagonal, and the cross section is circular; the top surface and the bottom surface of the cavity are parallel, the diameter is 300mm, and the maximum diameter of the middle part of the cavity is 330 mm; the suppressor body 5 has an outer diameter of 363mm and a bottom thickness of 28 mm.
The cross section profiles of the 4 annularly arranged shallow arch three-dimensional stoppers 3 consist of inner arcs A and outer arcs A which are parallel to each other1、A2And an elliptical arc E smoothly connected at end points A, B, C, D1、E2And (4) forming. The inner arc A1The length from the starting point A to the center O of the inner bottom surface of the suppressor is 52mm, and the center O of the circle1On a perpendicular line to OA, and O1O is vertical to OA, the radius of an inner circular arc is 67.60mm, and the central angle is 35 degrees; outer arc A2Starting point B at O1On the extension line of A, the external arc A2Radius 87.88mm, center O1The central angle is 35 deg..
The elliptical arc E1Respectively, are arc A1、A2Starting point A, B, elliptical arc E1The major axis AB is 20.28mm long, and the minor axis is 10.14mm long; elliptic arc E2Respectively, are arc A2、A1End point C, D, elliptical arc E2The minor axis CD of (a) is 20.28mm long and the major axis is 26.36mm long.
The suppressor body 5 and the shallow-arcuate three-dimensional block 3 are integrally molded from a refractory material. The buffer ball is CaO-MgO refractory material ball which is transformed into plastic material after being heated by molten steel.
Example 2:
the depth of a molten steel pool in the middle of a certain steel plant is 1200mm, the inner diameter of a long nozzle is 100mm, the insertion depth of the long nozzle is 500mm, and the height from the outlet of the long nozzle to the inner bottom surface of a tundish is 700 mm.
The height of 4 shallow bow-shaped solid stoppers 3 arranged annularly around the center of the bottom surface is 50mm, and the bottom surface of the cavity is uniformly filled with buffer balls with the diameter of 30 mm. The suppressor body 5 is embedded in and installed at the bottom 6 of a continuous casting tundish and is positioned right below a long water gap 7 of the tundish, the axial lead of the suppressor body coincides with the axial lead of the long water gap 7, and the inner bottom surface of the suppressor body 5 and the inner bottom surface of the tundish are on the same plane.
The height of the cavity in the suppressor body 5 is 233.33mm, the diameter of the upper opening 1 is 600mm, and the height is 46.67 mm; the axial section of the cavity 2 below the opening is hexagonal or octagonal, and the cross section is circular; the top surface and the bottom surface of the cavity are parallel, the diameter is 600mm, and the maximum diameter of the middle part of the cavity is 720 mm; the suppressor body 5 had an outer diameter of 792mm and a bottom thickness of 77.78 mm.
The cross section profiles of the 4 annularly arranged shallow arch three-dimensional stoppers 3 consist of inner arcs A and outer arcs A which are parallel to each other1、A2And an elliptical arc E smoothly connected at end points A, B, C, D1、E2And (4) forming. The inner arc A1The length from the starting point A to the center O of the inner bottom surface of the suppressor is 80mm, and the center O of the circle1On a perpendicular line to OA, and O1O is vertical to OA, the radius of an inner arc is 120mm, and the central angle is 45 degrees; outer arc A2Starting point B at O1On the extension line of A, the external arc A2Radius of 180mm and center of circle O1The central angle is 45 degrees.
The elliptical arc E1Respectively, are arc A1、A2Starting point A, B, elliptical arc E1The major axis AB is 60mm long, and the minor axis is 55mm long; elliptic arc E2Respectively, are arc A2、A1End point C, D, elliptical arc E2The minor axis CD of (1) is 60mm long and the major axis is 180mm long.
The suppressor body 5 and the shallow-arcuate three-dimensional block 3 are integrally molded from a refractory material. The buffer ball is CaO-MgO refractory material ball which is transformed into plastic material after being heated by molten steel.
Example 3:
the depth of a molten steel pool in the middle of a certain steel plant is 1200mm, the inner diameter of a long nozzle is 100mm, the insertion depth of the long nozzle is 500mm, and the height from the outlet of the long nozzle to the inner bottom surface of a tundish is 700 mm.
The height of 4 shallow bow-shaped solid stoppers 3 arranged annularly around the center of the bottom surface is 40mm, and the bottom surface of the cavity is uniformly filled with buffer balls with the diameter of 24 mm. The suppressor body 5 is embedded in and installed at the bottom 6 of a continuous casting tundish and is positioned right below a long water gap 7 of the tundish, the axial lead of the suppressor body coincides with the axial lead of the long water gap 7, and the inner bottom surface of the suppressor body 5 and the inner bottom surface of the tundish are on the same plane.
The height of the cavity in the suppressor body 5 is 200.67mm, the diameter of the upper opening 1 is 500mm, and the height is 40.13 mm; the axial section of the cavity 2 below the opening is hexagonal or octagonal, and the cross section is circular; the top surface and the bottom surface of the cavity are parallel, the diameter is 500mm, and the maximum diameter of the middle part of the cavity is 585 mm; the suppressor body 5 had an outer diameter of 643.50mm and a bottom thickness of 57.52 mm.
The cross section profiles of the 4 annularly arranged shallow arch three-dimensional stoppers 3 consist of inner arcs A and outer arcs A which are parallel to each other1、A2And an elliptical arc E smoothly connected at end points A, B, C, D1、E2And (4) forming. The inner arc A1The length from the starting point A to the center O of the inner bottom surface of the suppressor is 66.80mm, and the center O of the circle1On a perpendicular line to OA, and O1O is vertical to OA, the radius of the inner circular arc is 95.52mm, and the central angle is 42 degrees; outer arc A2Starting point B at O1On the extension line of A, the external arc A2Radius 136.60mm, center O1Central angle 42.
The elliptical arc E1Respectively, are arc A1、A2Starting point A, B, elliptical arc E1The major axis AB is 41.08mm long, and the minor axis is 31.94mm long; elliptic arc E2Respectively, are arc A2、A1End point C, D, elliptical arc E2The minor axis CD of (a) is 41.08mm long and the major axis is 98.59mm long.
The suppressor body 5 and the shallow-arcuate three-dimensional block 3 are integrally molded from a refractory material. The buffer ball is CaO-MgO refractory material ball which is transformed into plastic material after being heated by molten steel.
Example 4:
the depth of a molten steel pool in the middle of a certain steel plant is 1200mm, the inner diameter of a long nozzle is 100mm, the insertion depth of the long nozzle is 500mm, and the height from the outlet of the long nozzle to the inner bottom surface of a tundish is 700 mm.
The height of 4 shallow arch-shaped three-dimensional stoppers 3 arranged annularly around the center of the bottom surface is 30mm, and the bottom surface of the cavity is uniformly filled with buffer balls with the diameter of 16 mm. The suppressor body 5 is embedded in and installed at the bottom 6 of a continuous casting tundish and is positioned right below a long water gap 7 of the tundish, the axial lead of the suppressor body coincides with the axial lead of the long water gap 7, and the inner bottom surface of the suppressor body 5 and the inner bottom surface of the tundish are on the same plane.
The height of the cavity in the suppressor body 5 is 172.67mm, the diameter of the upper opening 1 is 400mm, and the height is 34.53 mm; the axial section of the cavity 2 below the opening is hexagonal or octagonal, and the cross section is circular; the top surface and the bottom surface of the cavity are parallel, the diameter is 400mm, and the maximum diameter of the middle part of the cavity is 452 mm; the suppressor body 5 had an outer diameter of 497.20mm and a bottom thickness of 42.59 mm.
The cross section profiles of the 4 annularly arranged shallow arch three-dimensional stoppers 3 consist of inner arcs A and outer arcs A which are parallel to each other1、A2And an elliptical arc E smoothly connected at end points A, B, C, D1、E2And (4) forming. The inner arc A1The length from the starting point A to the center O of the inner bottom surface of the suppressor is 58mm, and the center O of the circle1On a perpendicular line to OA, and O1O is vertical to OA, the radius of an inner circular arc is 79.46mm, and the central angle is 38 degrees; outer arc A2Starting point B at O1On the extension line of A, the external arc A2Radius of 108.86mm and center O1The central angle being 38 deg..
The elliptical arc E1Respectively, are arc A1、A2Starting point A, B, elliptical arc E1The length of the major axis AB is 29.40mm, and the length of the minor axis AB is 18.79 mm; elliptic arc E2Respectively, are arc A2、A1End point C, D, elliptical arc E2The minor axis CD of (a) is 29.40mm long and the major axis is 55.86mm long.
The suppressor body 5 and the shallow-arcuate three-dimensional block 3 are integrally molded from a refractory material. The buffer ball is CaO-MgO refractory material ball which is transformed into plastic material after being heated by molten steel.
Claims (5)
1. A continuous casting tundish belt buffer ball spiral-flow type turbulence suppressor is characterized in that a cavity is arranged in a suppressor body, buffer balls are uniformly filled in the bottom space of the cavity, and an opening at the upper end of the cavity is an opening at the upper part of the suppressor; the stopper body inner cavity bottom center is equipped with the three-dimensional dog that 4 rings were arranged, its characterized in that: the 4 annularly arranged three-dimensional stop blocks are shallow arch three-dimensional stop blocks; the height of the shallow arch-shaped solid block is 20-50mm, and the cross section profile of the shallow arch-shaped solid block consists of an inner arc A and an outer arc A which are parallel to each other1、A2And at both end pointsSmoothly connected elliptical arc E1、E2Composition is carried out;
the longitudinal section of the cavity is hexagonal or octagonal.
2. The continuous casting tundish belt buffer ball cyclone-type turbulence suppressor of claim 1, wherein: the inner arc A of the shallow arc-shaped three-dimensional block1The length from the starting point A to the center O of the inner bottom surface of the suppressor is equal to R + (0.2-1) R1Wherein R is the inner radius of the long nozzle of the continuous casting tundish, R1Is the diameter of the buffer ball;
the inner arc A1Center of circle O of1On a perpendicular line to OA, and O1O is perpendicular to OA and has an inner arc A1The radius is (1.3-1.5) OA, and the central angle is 35-45 degrees; outer arc A2Starting point B is at O1On the extension line A, the outer arc A2Center of circle O1The radius is (1.3-1.5) inner circular arc A1Radius, central angle being equal to inner arc A1A central angle;
the elliptical arc E1Respectively A, B, elliptical arc E1The long axis is AB, and the length of the short axis is 6/12-11/12 of the long axis; elliptic arc E2Respectively C, D, elliptical arc E2The minor axis is CD, and the major axis length is (1.3-3) the minor axis length.
3. The continuous casting tundish belt buffer ball cyclone-type turbulence suppressor of claim 1, wherein: the suppressor body is a cylinder, the cross section of an inner cavity is circular, an opening at the upper part of the suppressor is a circular opening, and the diameter of the opening is 3-6 times of the inner diameter of the long nozzle; the top surface and the bottom surface of the cavity of the suppressor are parallel, the diameter of the cavity is equal to the diameter of the opening at the upper part and is the minimum diameter of the cavity, the maximum diameter of the middle part of the cavity is 1.1-1.2 times of the minimum diameter of the cavity, and the outer diameter of the suppressor body is 1.1 times of the maximum diameter of the cavity; the height of the cavity of the suppressor is 3/15-5/15 from the outlet of the long nozzle to the bottom of the tundish, the height of the upper opening is 1/5, and the thickness of the bottom of the suppressor body is 3/15-5/15 of the height of the cavity.
4. The continuous casting tundish belt buffer ball cyclone-type turbulence suppressor of claim 1, wherein: the bottom of the inner cavity of the suppressor body and the shallow arch-shaped three-dimensional stop block are integrally molded and made of refractory materials.
5. The continuous casting tundish belt buffer ball cyclone-type turbulence suppressor of claim 1, wherein: the buffer balls are CaO-MgO refractory material balls with the diameter of 10-30 mm.
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| CN201911128434.9A CN110653366A (en) | 2019-11-18 | 2019-11-18 | Continuous casting tundish belt buffering ball cyclone type turbulence suppressor |
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| CN201911128434.9A CN110653366A (en) | 2019-11-18 | 2019-11-18 | Continuous casting tundish belt buffering ball cyclone type turbulence suppressor |
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Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN112191835A (en) * | 2020-10-12 | 2021-01-08 | 武汉科技大学 | "Dujiang weir" type multistage bottom cyclone type current stabilizer |
| WO2023185874A1 (en) * | 2022-03-28 | 2023-10-05 | 宝山钢铁股份有限公司 | Method and apparatus for reducing fine inclusions in molten steel |
| CN112191835B (en) * | 2020-10-12 | 2024-04-19 | 武汉科技大学 | Multi-stage bottom swirling type current stabilizer |
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| CN210908093U (en) * | 2019-11-18 | 2020-07-03 | 武汉科技大学 | Continuous casting tundish belt buffering ball cyclone type turbulence suppressor |
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| CN2578013Y (en) * | 2002-11-14 | 2003-10-08 | 武汉钢实星源工业总公司 | Anti-vortex impact pad for continuous casting bakie |
| JP2010064124A (en) * | 2008-09-12 | 2010-03-25 | Sumitomo Metal Ind Ltd | Method for applying swirling to molten metal flow |
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| CN210908093U (en) * | 2019-11-18 | 2020-07-03 | 武汉科技大学 | Continuous casting tundish belt buffering ball cyclone type turbulence suppressor |
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| Publication number | Priority date | Publication date | Assignee | Title |
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| CN112191835A (en) * | 2020-10-12 | 2021-01-08 | 武汉科技大学 | "Dujiang weir" type multistage bottom cyclone type current stabilizer |
| CN112191835B (en) * | 2020-10-12 | 2024-04-19 | 武汉科技大学 | Multi-stage bottom swirling type current stabilizer |
| WO2023185874A1 (en) * | 2022-03-28 | 2023-10-05 | 宝山钢铁股份有限公司 | Method and apparatus for reducing fine inclusions in molten steel |
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