CN111788024B - Ladle for molten metal - Google Patents
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- CN111788024B CN111788024B CN201980016352.7A CN201980016352A CN111788024B CN 111788024 B CN111788024 B CN 111788024B CN 201980016352 A CN201980016352 A CN 201980016352A CN 111788024 B CN111788024 B CN 111788024B
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- 239000002184 metal Substances 0.000 title claims abstract description 68
- 229910052751 metal Inorganic materials 0.000 title claims abstract description 68
- 239000011819 refractory material Substances 0.000 claims description 27
- 239000011449 brick Substances 0.000 claims description 10
- 230000014509 gene expression Effects 0.000 claims description 3
- XEEYBQQBJWHFJM-UHFFFAOYSA-N Iron Chemical compound [Fe] XEEYBQQBJWHFJM-UHFFFAOYSA-N 0.000 description 18
- 230000035882 stress Effects 0.000 description 10
- 229910052742 iron Inorganic materials 0.000 description 9
- 229910000831 Steel Inorganic materials 0.000 description 8
- 230000008439 repair process Effects 0.000 description 8
- 239000010959 steel Substances 0.000 description 8
- 230000008646 thermal stress Effects 0.000 description 7
- 230000000052 comparative effect Effects 0.000 description 5
- 238000011156 evaluation Methods 0.000 description 3
- 239000007788 liquid Substances 0.000 description 3
- 229910000805 Pig iron Inorganic materials 0.000 description 2
- 230000006866 deterioration Effects 0.000 description 2
- 238000004519 manufacturing process Methods 0.000 description 2
- 239000000463 material Substances 0.000 description 2
- 239000011823 monolithic refractory Substances 0.000 description 2
- 230000001902 propagating effect Effects 0.000 description 2
- 230000015556 catabolic process Effects 0.000 description 1
- 238000005336 cracking Methods 0.000 description 1
- 238000006731 degradation reaction Methods 0.000 description 1
- 230000000694 effects Effects 0.000 description 1
- 238000002474 experimental method Methods 0.000 description 1
- 238000002844 melting Methods 0.000 description 1
- 230000008018 melting Effects 0.000 description 1
- 150000002739 metals Chemical class 0.000 description 1
- 238000000034 method Methods 0.000 description 1
- 239000000203 mixture Substances 0.000 description 1
Images
Classifications
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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
- B22D41/04—Casting melt-holding vessels, e.g. ladles, tundishes, cups or the like tiltable
-
- 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
-
- 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
- B22D41/02—Linings
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- Engineering & Computer Science (AREA)
- Mechanical Engineering (AREA)
- Casting Support Devices, Ladles, And Melt Control Thereby (AREA)
- Furnace Housings, Linings, Walls, And Ceilings (AREA)
- Treatment Of Steel In Its Molten State (AREA)
Abstract
一种熔融金属用浇包，具有浇包主体和配置于该浇包主体的内侧的耐火材料层，且在所述浇包主体的两侧具备凸耳轴，所述浇包主体的包含所述凸耳轴在内的水平截面被设为具备第1圆弧、第2圆弧和曲线部的非圆形形状，所述第1圆弧的圆心位于连接所述凸耳轴的轴线上，曲率半径为R1，且包含与所述凸耳轴正交的部位，所述第2圆弧的圆心位于与所述轴线正交的中心轴上，曲率半径为R2，且包含与所述中心轴正交的部位，所述曲线部将所述第1圆弧和所述第2圆弧连接，且最小曲率半径为R3MIN，所述第1圆弧的曲率半径R1、所述第2圆弧的曲率半径R2、所述曲线部的最小曲率半径R3MIN满足下述的(1)式～(3)式，(1)式：0.401×R1＜R3MIN＜R1；(2)式：0.401×R2＜R3MIN＜R2；(3)式：R1≤R2。
A ladle for molten metal having a ladle body and a refractory layer disposed inside the ladle body, and having lug shafts on both sides of the ladle body, the ladle body including the The horizontal cross section inside the trunnion shaft is made into a non-circular shape having a first arc, a second arc, and a curved portion, the center of the first arc is located on the axis connecting the trunnion shaft, and the curvature is The radius is R1, and includes the part that is orthogonal to the lug axis, the center of the second arc is located on the central axis orthogonal to the axis, and the radius of curvature is R2, and includes the center axis that is orthogonal to the central axis. The curved portion connects the first circular arc and the second circular arc, and the minimum curvature radius is R3 MIN , the curvature radius R1 of the first circular arc, the The radius of curvature R2 and the minimum radius of curvature R3 MIN of the curved portion satisfy the following formulas (1) to (3), formula (1): 0.401×R1< R3MIN <R1; (2) formula: 0.401×R2 <R3 MIN <R2; Formula (3): R1≤R2.
Description
Technical Field
The present invention relates to a ladle for molten metal that holds molten metal such as molten iron or molten steel in an iron making facility.
This application claims priority based on patent application No. 2018-152619, filed in japan at 14.8.8.2018, the contents of which are incorporated herein by reference.
Background
For example, in an iron-making facility, molten iron or molten steel from a converter or a special vehicle for transporting liquid pig iron is held in a ladle (ladle for molten metal) and transported.
The ladle for molten metal has a structure including a ladle body made of iron and a refractory layer disposed inside the ladle body in order to maintain a high temperature of molten metal. Further, trunnions are provided on both sides in the width direction of the ladle body, and the trunnions can be lifted by a crane or the like and can be tilted toward the center of the trunnions.
Conventionally, as the ladle for molten metal, for example, as shown in patent document 1, there has been proposed a ladle in which a horizontal cross-sectional shape of a ladle body is a circular shape or an elliptical shape.
Since the above-described ladle for molten metal holds a high-temperature molten metal, the refractory layer disposed inside the ladle body is thermally degraded and cracks or the like occur. Therefore, the refractory layer needs to be repaired periodically for a certain number of uses.
Here, by increasing the ladle volume of the ladle for molten metal, the amount of molten metal to be handled before the repair work of the refractory layer can be increased, and the manufacturing cost can be reduced.
In order to increase the ladle volume of the ladle for molten metal, it is conceivable to increase the outer shape of the ladle body. However, when the outer shape of the ladle for molten metal is increased, it is not practical to significantly modify the entire facility in order to make other facilities such as a crane correspond to the outer shape of the ladle for molten metal.
For this reason, for example, patent document 2 proposes a ladle for molten metal having a large ladle volume without greatly changing the outer shape of the ladle for molten metal. In the ladle for molten metal described in patent document 2, the horizontal cross-sectional shape of the ladle body is made to approximate a rectangular shape, thereby increasing the volume of the ladle. In addition, by forming the horizontal cross section with a circular arc, stress concentration at the corner is suppressed.
Prior art documents
Patent document
Patent document 1: japanese laid-open patent publication No. 2000-256728
Patent document 2: japanese laid-open patent publication No. 2016-059940
Disclosure of Invention
Recently, in order to further reduce the production cost, it is required to further reduce the number of times of repairing the refractory layer in the ladle for molten metal.
In the ladle for molten metal described in patent document 2, the horizontal cross section is formed by a circular arc to suppress stress concentration at the corner, but the stress on the refractory layer cannot be sufficiently reduced, and the number of times of repairing the refractory layer may increase. Recently, there is a demand for an increase in the service life of a ladle for molten metal, and it is necessary to reduce thermal stress to a ladle body to suppress deformation of the ladle body.
The present invention has been made in view of the above circumstances, and an object thereof is to provide a ladle for molten metal, which can increase the ladle volume of the ladle for molten metal, and can suppress thermal stress acting on the ladle for molten metal, thereby reducing the number of repairs.
In order to solve the above problems, the ladle for molten metal according to the present invention includes a ladle body and a refractory layer disposed inside the ladle body, and is provided with trunnions on both sides of the ladle body, wherein a horizontal cross section of the ladle body including the trunnion is formed in a non-circular shape including a 1 st arc having a center on an axis connecting the trunnions, a curvature radius of R1, and a portion orthogonal to the trunnions, a 2 nd arc having a center on a central axis orthogonal to the axis, a curvature radius of R2, and a portion orthogonal to the central axis, the portion connecting the 1 st arc and the 2 nd arc, and a minimum curvature radius of R3MINA curvature radius R1 of the 1 st arc, a curvature radius R2 of the 2 nd arc, and a minimum curvature radius R3 of the curved portionMINSatisfies the following expressions (1) to (3).
(1) Formula (II): 0.401×R1＜R3MIN＜R1
(2) Formula (II): 0.401 XR 2 < R3MIN＜R2
(3) Formula (II): r1 is not less than R2
According to the ladle for molten metal having this configuration, a horizontal cross section of the ladle body including the trunnion is formed into a non-circular shape including a 1 st arc having a center on an axis connecting the trunnion shaft and a radius of curvature of R1 and including a portion orthogonal to the trunnion shaft, a 2 nd arc having a center on a central axis orthogonal to the axis and a radius of curvature of R2 and including a portion orthogonal to the central axis, and a curved portion connecting the 1 st arc and the 2 nd arc and having a minimum radius of curvature of R3MINMinimum radius of curvature R3 of the curved portionMINIs set to R3MIN＜R1、R3MINSince < R2, the 1 st arc and the 2 nd arc having a large radius of curvature are connected by a curved portion having a small radius of curvature, and the ladle body having a horizontal cross section of a substantially rectangular shape and a circular shape in a horizontal cross section can have a large ladle volume.
In addition, the minimum curvature radius R3 of the curve partMINSatisfies the condition that 0.401 multiplied by R1 is more than R3MIN、0.401×R2＜R3MINTherefore, the minimum curvature radius R3 of the curved portionMINThe curvature radius of the 1 st arc and the 2 nd arc is not excessively reduced, so that stress concentration at a connection portion between the 1 st arc and the curved portion and a connection portion between the 2 nd arc and the curved portion can be suppressed, and deformation of the ladle body and deterioration of the refractory layer can be suppressed. This can reduce the number of times of repairing the refractory of the ladle for molten metal.
Therefore, the ladle volume of the ladle for molten metal can be enlarged, and the number of repairs can be reduced by suppressing the thermal stress acting on the ladle for molten metal.
Here, in the ladle for molten metal of the present invention, the following may be used: the refractory material layer includes a 1 st refractory material layer disposed on the ladle body side and a 2 nd refractory material layer disposed on the inner side of the 1 st refractory material layer, the 1 st refractory material layer is made of refractory bricks, and the 2 nd refractory material layer is made of an unshaped refractory material.
In this case, even if a stress acts on the refractory layers to cause cracks, the cracks can be suppressed from propagating to the 1 st refractory material made of refractory bricks, and the 2 nd refractory layer disposed further inside the 1 st refractory layer may be repaired. Since the 2 nd refractory layer is made of an unshaped refractory, it can be repaired relatively easily. In addition, by suppressing the thermal stress acting on the 2 nd refractory layer, the repair cost can be further reduced.
As described above, according to the present invention, it is possible to provide a ladle for molten metal which can increase the ladle volume of the ladle for molten metal and reduce the number of repairs by suppressing the thermal stress acting on the ladle for molten metal.
Drawings
Fig. 1 is a side explanatory view showing an example of a ladle for molten metal according to an embodiment of the present invention.
Fig. 2 is a top explanatory view showing an example of a ladle for molten metal according to the embodiment of the present invention.
Fig. 3 is an explanatory view showing a horizontal cross-sectional shape of a ladle body of a ladle for molten metal according to an embodiment of the present invention.
Fig. 4 is an explanatory view showing the structure of the refractory layer in the ladle for molten metal according to the embodiment of the present invention.
FIG. 5 is a graph showing the results of example 1.
Detailed Description
Embodiments of the present invention will be described below with reference to the drawings. The present invention is not limited to the following embodiments.
The ladle 1 for molten metal according to the present embodiment includes a ladle body 10 and a refractory layer 20.
The ladle body 10 is provided with trunnions 18, 18 on both sides in the width direction, and the trunnions 18, 18 are transported by a crane or the like using the trunnions 18, and the trunnions 18, 18 are configured to be tiltable toward the center.
In the present embodiment, the horizontal cross section of the ladle body 10 including the trunnion 18 is formed in a non-circular shape as shown in fig. 3.
Specifically, the trunnion ring has a shape including a 1 st arc 11, a 2 nd arc 12, and a curved portion 13, the 1 st arc 11 having a center on an axis S1 connecting the trunnions 18, 18 and a radius of curvature R1 and including a portion orthogonal to the trunnion 18, the 2 nd arc 12 having a center on a center axis S2 orthogonal to the axis S1 and a radius of curvature R2 and including a portion orthogonal to the center axis S2, the curved portion 13 connecting the 1 st arc 11 and the 2 nd arc 12 and having a minimum radius of curvature R3MIN。
In the present embodiment, the curvature radii of the horizontal cross section of the ladle body 10, R1, R2, and R3MINMeasured on the inner wall surface of the ladle body 10.
Since the center of the 1 st arc 11 is located on the axis S1 connecting the trunnion shafts 18, the surface on which the trunnion shafts 18, 18 are disposed becomes the 1 st arc 11 described above.
The 2 nd arc 12 is formed in a direction orthogonal to the 1 st arc 11 because its center is located on the center axis S2 orthogonal to the axis S1 connecting the trunnions 18, 18.
The curved portion 13 is disposed at a corner where the 1 st arc 11 and the 2 nd arc 12 intersect.
Here, the curvature radius R1 of the 1 st arc 11, the curvature radius R2 of the 2 nd arc 12, and the minimum curvature radius R3 of the curved portion 13MINSatisfies the following expressions (1) to (3).
(1) Formula (II): 0.401 XR 1 < R3MIN＜R1
(2) Formula (II): 0.401 XR 2 < R3MIN＜R2
(3) Formula (II): r1 is not less than R2
As described above, the minimum curvature radius R3 of the curved portion 13MINR3 is set to the radius of curvature R1 of the 1 st arc 11 and the radius of curvature R2 of the 2 nd arc 12MIN< R1 and R3MIN< R2, the intersection (corner) of the 1 st arc 11 and the 2 nd arc 12 protrudes outward and has a shape similar to a rectangular shapeThe volume of the ladle body having a circular horizontal cross section can be increased without changing the outer shape.
In order to secure the volume, the minimum curvature radius R3 of the curved portion 13 is preferably set to be largeMINThe upper limits of (b) are set to 0.9 × R1 and 0.9 × R2.
In addition, the minimum curvature radius R3 of the curved portion 13MINThe radius of curvature R1 of the 1 st arc 11 and the radius of curvature R2 of the 2 nd arc 12 are set to 0.401 XR 1 < R3MINAnd 0.401 XR 2 < R3MIN. Namely, the minimum curvature radius R3 of the curved portion 13MINThe lower limit of (2) is specified.
By defining the minimum curvature radius R3 of the curved portion 13 in this mannerMINThe lower limit of (3) can suppress stress concentration at the connection portion between the 1 st arc 11 and the curved portion 13 and at the connection portion between the 2 nd arc 12 and the curved portion 13. This can suppress deformation of the ladle body 10, degradation of the refractory layer 20, and the like.
Further, in order to further suppress stress concentration at the connection portion between the 1 st arc 11 and the curved portion 13 and at the connection portion between the 2 nd arc 12 and the curved portion 13, the minimum curvature radius R3 of the curved portion 13 is set to be smaller than the minimum curvature radius R3MINThe lower limit of (b) is preferably 0.41 × R1 and 0.41 × R2, more preferably 0.42 × R1 and 0.42 × R2, and still more preferably 0.45 × R1 and 0.45 × R2.
In the present embodiment, as shown in fig. 4, the refractory layer 20 includes: a 1 st refractory layer 21 disposed on the ladle body 10 side, and a 2 nd refractory layer 22 disposed on the inner side of the 1 st refractory layer 21.
In the present embodiment, the 1 st refractory material layer 21 is formed by stacking refractory bricks. The 2 nd refractory layer 22 is formed of an unshaped refractory. In addition, the 2 nd refractory material layer 22 may be formed using refractory bricks in order to suppress melting loss in the region where the liquid surface of the molten metal is located.
The ratio t2/t1 of the thickness t1 of the 1 st refractory layer 21 and the thickness t2 of the 2 nd refractory layer 22 is preferably 1 or more, and more preferably 2 or more.
The ladle 1 for molten metal according to the present embodiment receives molten iron or molten steel from a converter or a special vehicle for transporting liquid pig iron, and the hook of the raise crane hooks the trunnions 18 and 18 to transport the molten iron or molten steel, and the trunnions 18 and 18 are tilted toward the center, thereby transferring the molten iron or molten steel to a vessel in a next process.
In this way, the hot metal ladle 1 is charged and discharged with hot molten iron or molten steel, and severe thermal stress is repeatedly applied thereto.
When the refractory layer 20 disposed inside the ladle body 10 has cracks or the like, the refractory layer 20 can be repaired and reused.
According to the ladle 1 for molten metal of the present embodiment having the above-described configuration, the horizontal cross section of the ladle body 10 including the trunnion 18 is formed in a non-circular shape including the 1 st arc 11, the 2 nd arc 12 and the curved portion 13, the 1 st arc 11 having a center on the axis S1 connecting the trunnions 18, 18 and a radius of curvature R1 and including a portion orthogonal to the trunnion 18, the 2 nd arc 12 having a center on the central axis S2 orthogonal to the axis S1 and a radius of curvature R2 and including a portion orthogonal to the central axis S2, the curved portion 13 connecting the 1 st arc 11 and the 2 nd arc 12 and having a minimum radius of curvature R3MINMinimum radius of curvature R3 of curved portion 13MINIs set to R3MIN＜R1、R3MINSince R2 is smaller, the horizontal cross section is formed in a shape similar to a rectangular shape, and the ladle volume can be increased relative to a ladle body having a circular shape in the horizontal cross section.
In addition, the minimum curvature radius R3 of the curved portion 13MINIs set to 0.401 XR 1 < R3MIN、0.401×R2＜R3MINAnd therefore the minimum radius of curvature R3 of the curved portion 13MINThe stress concentration at the connection portion between the 1 st arc 11 and the curved portion 13 and at the connection portion between the 2 nd arc 12 and the curved portion 13 can be suppressed without being excessively small, and deformation of the ladle body 10 and deterioration of the refractory layer 20 can be suppressed. This can reduce the number of repairs of the ladle for molten metal 1.
Further, in the present embodiment, the refractory layer 20 includes the 1 st refractory layer 21 disposed on the ladle body 10 side and the 2 nd refractory layer 22 disposed on the inner side of the 1 st refractory layer 21, and when the 1 st refractory layer 21 is made of refractory bricks and the 2 nd refractory layer 22 is made of an amorphous refractory, stress concentration on the 1 st refractory layer 21 disposed on the ladle body 10 side can be suppressed, and the life of the 1 st refractory layer 21 can be further extended. Even if a crack occurs due to stress applied to the refractory material layer 20, the crack can be suppressed from propagating into the 1 st refractory material layer 21 made of refractory bricks, and the 2 nd refractory material layer 22 disposed further inside the 1 st refractory material layer 21 can be repaired. Since the 2 nd refractory layer is made of an unshaped refractory, it can be repaired relatively easily, and the repair cost can be further reduced.
The ladle for molten metal according to the embodiment of the present invention has been specifically described above, but the present invention is not limited to this, and can be modified as appropriate within a range not departing from the technical idea of the invention.
For example, in the present embodiment, the ladle for molten metal having the trunnion with the configuration shown in fig. 1 is described by way of example, but the ladle for molten metal is not limited thereto, and may be a ladle for molten metal having a trunnion with another configuration.
In the present embodiment, the ladle for molten metal that holds and conveys molten iron and molten steel has been described, but the ladle for molten metal is not limited to this, and may be a ladle for molten metal that handles other molten metals.
Further, in the present embodiment, the description has been given of the refractory layer having the 1 st refractory layer and the 2 nd refractory layer, but the present invention is not limited to this, and the refractory layer may have 1 refractory layer or 3 or more refractory layers.
Examples
The results of the experiments conducted are described below to confirm the effects of the present invention.
< example 1 >
As an example of the present invention, the ladle for molten metal described in the above embodiment is prepared.The curvature radius R1 of the 1 st arc was 4170mm, the curvature radius R2 of the 2 nd arc was 4170mm, and the minimum curvature radius R3 of the curved portion was set toMINSet to 1700 mm. Namely, the composition was made to satisfy 0.401 XR 1 < R3MIN＜R1、0.401×R2＜R3MINA ladle for molten metal < R2, R1. ltoreq.R 2.
As a comparative example, the curvature radius R1 of the 1 st arc was 4170mm, the curvature radius R2 of the 2 nd arc was 4170mm, and the minimum curvature radius R3 of the curved portion was setMINSet to 1150 mm. That is, it was made to have R3MIN＜0.401×R1、R3MINA ladle for molten metal having a relationship of < 0.401 XR 2.
The minimum value of the remaining thickness of the refractory layer after use was measured using the ladles for molten metal of the inventive examples and comparative examples. Fig. 5 shows the relationship with the minimum value of the remaining thickness of the refractory layer when the initial thickness of the inventive example and the comparative example is "1", and shows the number of uses of the refractory life of the comparative example as a relative value when the number of uses of the refractory life of the present invention is 1.
As shown in fig. 5, it was confirmed that: the ladle for molten metal of the present invention has a larger residual thickness of the refractory layer after use than the ladle for molten metal of the comparative example, and can have a longer service life.
Further, the ladle for molten metal according to the example of the present invention can have a larger ladle volume than a ladle for molten metal having a circular horizontal cross section.
< example 2 >
As test nos. a to H, ladles for molten metal were prepared which had a shape including, in a horizontal cross section including the trunnion 18, a 1 st arc, a 2 nd arc and a curved portion, the 1 st arc having a center located on an axis connecting the trunnion, a radius of curvature of R1 and including a portion orthogonal to the trunnion, the 2 nd arc having a center located on a central axis orthogonal to the axis, a radius of curvature of R2 and including a portion orthogonal to the central axis, the curved portion connecting the 1 st arc and the 2 nd arc and having a minimum radius of curvatureIs R3MIN. R1, R2, R3 are shown in Table 1MINThe relationship (2) of (c). Table 1 shows the ratio t2/t1 between the thickness t1 of the 1 st refractory material layer (refractory brick) and the thickness t2 of the 2 nd refractory material layer (monolithic refractory material).
The molten steel is transferred using the ladle for molten metal. The effective volume of the ladle, the number of times of use, the minimum value of the remaining thickness of the refractory layer, and the presence or absence of cracking in the refractory layer at the curved portion were evaluated. Each evaluation was a relative evaluation performed with test a as a reference (1). The evaluation results are shown in table 1.
TABLE 1
※t2/t1
: the ratio of the thickness t1 of the 1 st refractory material layer (refractory brick) to the thickness t2 of the 2 nd refractory material layer (monolithic refractory material)
At R3MIN＝0.3×R1、R3MINTest No. g of 0.3 xr 2, and R3MIN＝0.25×R1、R3MINIn test No. h of 0.25 × R2, the refractory layer cracked in the curved portion.
When the formula is satisfied that 0.401 XR 1 < R3MIN＜R1、0.401×R2＜R3MINIn test nos. b to F < R2, the effective volume was larger than in test No. a having a circular horizontal cross section. In addition, the occurrence of cracks in the refractory layer at the curved portion can be suppressed.
Further, for R3MIN0.401 xr 1 and R3MINIn No. e in which the ratio t2/t1 between the thickness t1 of the 1 st refractory material layer (refractory brick) and the thickness t2 of the 2 nd refractory material layer (unshaped refractory) is 1, NoE and No. f of 0.401 × R2 are compared, and the number of times of using the refractory until the remaining thickness of the refractory material layer reaches 40mm is increased as compared with No. f in which t2/t1 is 0.5, and the life of the refractory material layer can be extended.
Industrial applicability of the invention
According to the present invention, it is possible to provide a ladle for molten metal which can increase the ladle volume of the ladle for molten metal and can reduce the number of repairs by suppressing the thermal stress acting on the ladle for molten metal.
Description of the reference numerals
1 ladle for molten metal
10 ladle body
11 st arc
12 nd arc 2
13 part of curve
18 lobe shaft
20 layer of refractory material
21 st refractory layer
22 nd 2 refractory material layer
Claims (2)
1. A ladle for molten metal, characterized in that,
comprising a ladle body and a refractory layer disposed inside the ladle body, and trunnions provided on both sides of the ladle body,
the horizontal cross section of the ladle body including the trunnion is a non-circular shape having a 1 st circular arc, a 2 nd circular arc, and a curved portion,
the center of the 1 st circular arc is positioned on the axis connecting the trunnion shaft, the curvature radius is R1, and the circular arc comprises a part orthogonal to the axis of the trunnion shaft,
the 2 nd arc has a center on a central axis orthogonal to the axis, has a radius of curvature of R2, and includes a portion orthogonal to the central axis,
the curved portion connects the 1 st arc and the 2 nd arc and has a minimum radius of curvature of R3MIN，
A curvature radius R1 of the 1 st circular arc, a curvature radius R2 of the 2 nd circular arc, and a minimum curvature radius R3 of the curved portionMINSatisfying the following expressions (1) to (3),
(1) formula (II): 0.401 XR 1 < R3MIN＜R1；
(2) Formula (II): 0.401 XR 2 < R3MIN＜R2；
(3) Formula (II): r1 is less than or equal to R2.
2. A ladle for molten metal according to claim 1,
the refractory layer includes a 1 st refractory layer disposed on the ladle body side and a 2 nd refractory layer disposed on the inner side of the 1 st refractory layer,
the 1 st refractory material layer is made of refractory bricks, and the 2 nd refractory material layer is made of amorphous refractory materials.
Applications Claiming Priority (3)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP2018-152619 | 2018-08-14 | ||
| JP2018152619 | 2018-08-14 | ||
| PCT/JP2019/031852 WO2020036179A1 (en) | 2018-08-14 | 2019-08-13 | Ladle for molten metal |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN111788024A CN111788024A (en) | 2020-10-16 |
| CN111788024B true CN111788024B (en) | 2021-09-07 |
Family
ID=69525431
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201980016352.7A Active CN111788024B (en) | 2018-08-14 | 2019-08-13 | Ladle for molten metal |
Country Status (5)
| Country | Link |
|---|---|
| JP (1) | JP6892016B2 (en) |
| KR (1) | KR102410966B1 (en) |
| CN (1) | CN111788024B (en) |
| TW (1) | TWI716065B (en) |
| WO (1) | WO2020036179A1 (en) |
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|---|---|---|---|---|
| JPH10113764A (en) * | 1996-10-08 | 1998-05-06 | Kawasaki Steel Corp | Transporting vessel of molten metal |
| JP2000256728A (en) * | 1999-03-08 | 2000-09-19 | Kawasaki Steel Corp | Ladle for molten metal and method for refining molten metal |
| WO2005070594A1 (en) * | 2004-01-21 | 2005-08-04 | Mannesmannröhren-Werke GmbH | Container for metallurgical purposes |
| JP2007007667A (en) * | 2005-06-28 | 2007-01-18 | Jfe Steel Kk | Molten metal container |
| CN201823925U (en) * | 2010-03-08 | 2011-05-11 | 浙江自立股份有限公司 | Precast block for ladle bottom impact area of steel ladle |
| CN102430749A (en) * | 2011-12-31 | 2012-05-02 | 大冶特殊钢股份有限公司 | Elliptical steel ladle and manufacturing method thereof |
| JP2016059940A (en) * | 2014-09-18 | 2016-04-25 | 新日鐵住金株式会社 | Ladle for molten metal |
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| JPS608319Y2 (en) * | 1980-01-21 | 1985-03-23 | 新日本製鐵株式会社 | Movable deck for demolition work of fireproof lining |
| JP5312090B2 (en) * | 2009-02-20 | 2013-10-09 | 株式会社神戸製鋼所 | Reducing the amount of steel remaining in the ladle |
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2019
- 2019-08-08 TW TW108128303A patent/TWI716065B/en active
- 2019-08-13 KR KR1020207024590A patent/KR102410966B1/en active IP Right Grant
- 2019-08-13 JP JP2020537084A patent/JP6892016B2/en active Active
- 2019-08-13 WO PCT/JP2019/031852 patent/WO2020036179A1/en active Application Filing
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| JPH10113764A (en) * | 1996-10-08 | 1998-05-06 | Kawasaki Steel Corp | Transporting vessel of molten metal |
| JP2000256728A (en) * | 1999-03-08 | 2000-09-19 | Kawasaki Steel Corp | Ladle for molten metal and method for refining molten metal |
| WO2005070594A1 (en) * | 2004-01-21 | 2005-08-04 | Mannesmannröhren-Werke GmbH | Container for metallurgical purposes |
| JP2007007667A (en) * | 2005-06-28 | 2007-01-18 | Jfe Steel Kk | Molten metal container |
| CN201823925U (en) * | 2010-03-08 | 2011-05-11 | 浙江自立股份有限公司 | Precast block for ladle bottom impact area of steel ladle |
| CN102430749A (en) * | 2011-12-31 | 2012-05-02 | 大冶特殊钢股份有限公司 | Elliptical steel ladle and manufacturing method thereof |
| JP2016059940A (en) * | 2014-09-18 | 2016-04-25 | 新日鐵住金株式会社 | Ladle for molten metal |
Also Published As
| Publication number | Publication date |
|---|---|
| KR102410966B1 (en) | 2022-06-22 |
| TWI716065B (en) | 2021-01-11 |
| JP6892016B2 (en) | 2021-06-18 |
| WO2020036179A1 (en) | 2020-02-20 |
| KR20200108480A (en) | 2020-09-18 |
| TW202014256A (en) | 2020-04-16 |
| CN111788024A (en) | 2020-10-16 |
| JPWO2020036179A1 (en) | 2021-02-15 |
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