Take the pot

Abstract

To provide: a monolithic refractory for a slag exhaust portion, materializing reduction of deformation, rupture or falling of the monolithic refractory; and a ladle.SOLUTION: A monolithic refractory 2 for a slag exhaust portion can be installed at a slag exhaust portion 11 of a ladle 1. The monolithic refractory 2 for a slag exhaust portion comprises: a bottom portion 2a installed in the slag exhaust portion 11; an outer wall portion 2b equivalent to an outer circumferential side OUT of the ladle 1; an inner wall portion 2c equivalent to an inner circumferential side IN of the ladle 1; and a top wall portion 2d opposite to the bottom portion 2a. The monolithic refractory 2 for a slag exhaust portion comprises a recessed portion 3 in which, when it is installed in the slag exhaust portion 11, the outer wall portion 2b is recessed to an inner side in a radial direction than a steel shell 12 as an outer shell forming the outer circumference of the ladle 1 in a furnace top portion 10, and a part is recessed to the side of the inner wall portion 2c. When the bottom portion 2a of the monolithic refractory for a slag waste portion 2 is installed in the slag waste portion 11, the height of the furnace top portion 2d is made the height of an upper end portion 10a of the ladle 1. When the ladle 1 comprises a support tool 5 in the furnace top portion 10, a portion of the outer wall portion 2b is contacted with a portion of the support tool 5, and also, a portion of the support tool 5 penetrates into the recessed portion 3.SELECTED DRAWING: Figure 1

Description

Technical Field

[0001] The present invention relates to a shaped refractory for a slag discharge part used in a ladle's slag discharge part and the structure of a ladle including the shaped refractory for the slag discharge part.

Background Art

[0002] Conventionally, molten metal holding vessels such as ladles and retaining bricks have been proposed. For example, according to Patent Document 1, the molten metal holding vessel is provided inside the opening of an iron skin and includes a retaining brick that presses the brick layer from above. On the inner peripheral side of the lower surface of the retaining brick, a convex portion protruding downward is formed, and on the upper surface of the brick layer, a stepped portion with which the convex portion is engaged is formed. The joint between the lower surface of the retaining brick including this convex portion and the upper surface of the brick layer including the stepped portion is bent and includes a horizontal joint extending in the radial direction of the brick layer from the inner peripheral surface of the brick layer and a vertical joint located on the outer peripheral side of the brick layer with respect to this horizontal joint and extending in the height direction of the brick layer and connected to the horizontal joint.

[0003] According to this, even if metal enters the horizontal joint, the entry of the metal can be blocked at the connection between this horizontal joint and the vertical joint. As a result, the protrusion of the retaining brick due to the entry of the metal can be suppressed, and it is possible to prevent the metal from entering deep into the side closer to the iron skin. As a result, when removing the metal, it is possible to prevent the bricks in the brick layer from falling off and avoid the molten metal from contacting the iron skin, thus eliminating the risk of molten metal leakage, as described.

Prior Art Documents

Patent Documents

[0004]

Patent Document 1

Summary of the Invention

Problems to be Solved by the Invention

[0005] However, conventional examples have the following problems. Figure 5 illustrates an example from Patent Document 1. As shown in Figure 5, the retaining brick 120 and the steel shell 112 are integrated via a patching material 118. Because the patching material 118 is highly shrinkable, when the retaining brick 120 expands due to the heat from the molten metal inside the container, the patching material 118 is crushed and shrinks. When the patching material 118 cools, it becomes smaller than its dimensions before shrinkage, and a gap is created between the steel shell 112 and the retaining brick 120. When a gap is created, the restraining force of the retaining brick 120 decreases, the joint opens, and the base metal can easily enter.

[0006] The retaining bricks 120 expand due to heat absorption, and cooling creates gaps between the bricks, reducing their restraining force. As a result, when the retaining bricks 120 are heated again, they tilt and expand vertically. Furthermore, the increased penetration of the base metal makes it easier for localized stress to occur, causing the protrusions to fracture. Therefore, even if there are protrusions, there is a problem that they will fracture.

[0007] The object of this invention is to solve the problems of the prior art and to provide a refractory material for a waste disposal section and a ladle that reduce deformation, breakage, or detachment. [Means for solving the problem]

[0008] A shaped refractory for a slag drain according to a first aspect of the present invention is a shaped refractory that can be installed in a slag drain at the top of a ladle, comprising a bottom portion installed in the slag drain, an outer wall portion corresponding to the outer circumference of the ladle, an inner wall portion corresponding to the inner circumference of the ladle, and a top wall portion facing the bottom portion, with the top wall portion on the upper side and the bottom portion on the lower side in the vertical direction, and when installed in the slag drain, the outer wall portion is recessed radially inward from the outer shell forming the outer circumference of the ladle at the top of the furnace, and a portion of it is recessed toward the inner wall portion, the height of the top wall portion is the height of the upper end of the ladle, and when the ladle is equipped with a support at the top of the furnace, a portion of the outer wall portion is in contact with a portion of the support, and a portion of the support is inserted into the recess.

[0009] According to this, when the pre-shaped refractory material for the slag discharge section is installed in the slag discharge section, its outer wall is recessed radially inward from the outer shell that forms the outer circumference of the ladle at the top of the furnace, so there is no part that protrudes from the outer shell. Even if the outer shell at the top of the furnace comes into contact with an external obstacle, the pre-shaped refractory material for the slag discharge section is recessed inward from the outer shell, so damage due to force majeure can be prevented. Furthermore, in the vertical direction, the height of the top wall is the height of the top of the ladle. Therefore, molten slag and other materials in the ladle can be discharged along the top wall of the pre-shaped refractory material for the slag discharge section.

[0010] Furthermore, the refractory material for the slag discharge section has a recess in the outer wall that is recessed toward the inner wall. When the ladle is equipped with a support at the top of the furnace, a portion of the outer wall of the refractory material for the slag discharge section is in direct contact with the support, and the stress in the outer direction due to heat absorption is returned as a coaxial reaction force, thereby suppressing the occurrence of tilting. In addition, the insertion of a portion of the support into the recess suppresses vertical movement, reducing the likelihood of the material falling off due to lifting.

[0011] Furthermore, the refractory material for the slag discharge section may be made of magnesia carbon brick. In this case, the refractory material for the slag discharge section is less likely to get wet even if molten slag or molten metal from the ladle splatters and adheres to it, and it is easy to peel off even if the molten slag or molten metal solidifies. Therefore, the refractory material for the slag discharge section can reduce the process of removing molten slag or molten metal, thus reducing damage.

[0012] Furthermore, the recess in the refractory material for the slag discharge section may have gaps above, below, and radially in the part of the support that is inserted into it. In this case, even if the thermal expansion coefficient of the refractory material for the slag discharge section differs from that of the support, excessive stress can be suppressed, thereby reducing deformation, fracture, or detachment.

[0013] A ladle according to a second aspect of the present invention comprises a slag discharge section at the top of the furnace, a shaped refractory material for the slag discharge section installed in the slag discharge section, and a support member formed in the slag discharge section, wherein the shaped refractory material for the slag discharge section comprises a bottom portion installed in the slag discharge section, an outer wall portion on the outer circumference side, an inner wall portion on the inner circumference side, a top wall portion facing the bottom portion, and a recess in which a part of the outer wall portion is recessed toward the inner wall portion, with the top wall portion being the upper side and the bottom portion being the lower side in the vertical direction, and the shaped refractory material for the slag discharge section is recessed radially inward from the outer shell forming the outer circumference, and in the vertical direction, the top wall portion The height of the support is the height of the upper end of the furnace top, and the support comprises a protrusion projecting toward the inner circumference, a first contact portion located above the protrusion and in contact with the outer wall portion of the refractory material for the slag discharge section, and a second contact portion located below the protrusion and in contact with the outer wall portion of the refractory material for the slag discharge section. The first contact portion contacts the outer wall portion of the refractory material for the slag discharge section at a position adjacent to the top wall portion, the second contact portion contacts the outer wall portion of the refractory material for the slag discharge section at the lower side of the recess, and the protrusion is inserted into the recess.

[0014] According to this design, the outer wall of the refractory material for the slag discharge section of the ladle is recessed radially inward from the outer shell that forms the outer circumference of the ladle at the top of the furnace, so there is no part that protrudes from the outer shell. Even if the outer shell at the top of the furnace comes into contact with an external obstacle, the refractory material for the slag discharge section is recessed inward from the outer shell, so damage due to force majeure can be prevented. In the vertical direction, the height of the top wall is the height of the upper end of the ladle. Therefore, molten slag and other materials in the ladle can be discharged along the top wall of the refractory material for the slag discharge section.

[0015] Furthermore, the support for the ladle directly contacts the outer wall of the pre-shaped refractory material for the slag discharge section at the first and second contact points. Therefore, the pre-shaped refractory material for the slag discharge section suppresses tilting by receiving the stress in the outer direction due to heat absorption as a coaxial reaction force. In addition, since the convex portion is inserted into the concave portion, vertical movement of the pre-shaped refractory material for the slag discharge section is suppressed, preventing it from falling out due to lifting.

[0016] Furthermore, the ladle may have gaps on the upper, lower, and radial sides when the protrusion is inserted into the recess. In this case, even if the support and the refractory material for the slag discharge section expand and contract due to the heat of the molten metal, the ladle can reduce the generation of excessive stress on each other. Therefore, deformation, fracture, or detachment of the refractory material for the slag discharge section can be reduced.

[0017] Furthermore, the area of ​​the ladle surrounded by the first contact portion, the convex portion, and the second contact portion of the support, and the outer wall portion and the recess portion of the refractory material for the slag discharge portion, may be filled with a filler material.

[0018] In this case, the ladle increases the restraining force between the support and the refractory material for the slag discharge section by filling the enclosed space formed when the support contacts the refractory material for the slag discharge section with filler material. Therefore, deformation, fracture, or detachment of the refractory material for the slag discharge section can be reduced.

[0019] Furthermore, the ladle may have the slag discharge portion formed in a predetermined range in the circumferential direction, and the support may have the convex portion, the first contact portion, and the second contact portion formed continuously along the circumferential direction, and the convex portion may be inserted into the recess of the refractory material for the slag discharge portion, which is installed in a row of multiple units, and the first contact portion and the second contact portion may be in contact with the outer wall portion.

[0020] In this case, in the slag discharge section formed in a predetermined range in the circumferential direction, the support member has a convex portion, a first contact portion, and a second contact portion that are continuously formed along the circumferential direction, thereby increasing its strength. Since multiple pre-formed refractory materials for the slag discharge section are installed side by side, the support member and the pre-formed refractory materials for the slag discharge section are firmly in contact with each other, and the first and second contact portions are in contact with the outer wall. Therefore, the support member can firmly support the pre-formed refractory materials for the slag discharge section, thereby reducing deformation, breakage, or detachment of the pre-formed refractory materials for the slag discharge section of the ladle.

[0021] Further, the shaped refractory for the slag discharge part of the ladle may be formed of magnesia-carbon bricks. In this case, even if molten slag or molten metal in the ladle splashes and adheres, the shaped refractory for the slag discharge part is difficult to get wet, and even if the molten slag or molten metal solidifies, it is easy to peel off. Therefore, the shaped refractory for the slag discharge part can reduce the process of removing molten slag or molten metal, so that damage can be suppressed.

Brief Description of Drawings

[0022] [Figure 1] It is a view showing the shaped refractory 2 for the slag discharge part and the ladle 1 of the present invention, and is a central cross-sectional view showing an enlarged periphery of the slag discharge part 11 of the ladle 1. [Figure 2] It is a central cross-sectional view showing the whole ladle 1 of the present invention. [Figure 3] It is a plan view showing the whole ladle 1 of the present invention. [Figure 4] It is a view taking a plan view showing the slag discharge part 11 of the ladle 1 of the present invention in an enlarged manner as a perspective view. [Figure 5] It is a view showing the pressing bricks 120, the iron skin 112, and the patching material 118 in a conventional ladle.

[0023] Hereinafter, referring to the drawings, the shaped refractory 2 for the slag discharge part and the ladle 1 embodying the present invention will be described. The drawings referred to are used to explain the technical features that can be adopted by the present invention. The configuration of the device described in the drawings is not intended to be limited thereto, but is merely an illustrative example.

[0024] <<Description of the Shaped Refractory 2 for the Slag Discharge Part>> Referring to FIGS. 1 and 2, the configuration of the shaped refractory 2 for the slag discharge part according to the first aspect of the present invention will be described. The shaped refractory 2 for the slag discharge part is a shaped refractory that can be installed in the slag discharge part 11 at the furnace top part 10 of the ladle 1. The shaped refractory 2 for the slag discharge part includes a bottom part 2a installed in the slag discharge part 11, an outer wall part 2b corresponding to the outer peripheral side OUT of the ladle 1, an inner wall part 2c corresponding to the inner peripheral side IN of the ladle 1, and a top wall part 2d facing the bottom part 2a.

[0025] The top wall portion 2d is considered the upper side and the bottom portion 2a is considered the lower side, in the vertical direction. The ladle 1 is cylindrical, as will be described later, and with respect to a virtual central axis extending in the vertical direction of the ladle 1, the direction toward the outer shell is the radial direction and the circumferential direction is the circumferential direction. When the refractory material 2 for the slag removal section is installed in the slag removal section 11, the outer wall portion 2b is recessed radially inward from the iron shell 12 which is the outer shell forming the outer circumference of the ladle 1 at the top of the furnace 10, and has a recess 3 in which a part is recessed toward the inner wall portion 2c. In the slag removal section 11 of the ladle 1, the installation section 19 where the refractory material 2 for the slag removal section is installed is adjusted in height by adjustment bricks 17. When the refractory material 2 for the slag removal section is installed in the slag removal section 11, the height of the top wall portion 2d becomes the height of the upper end portion 10a of the ladle 1. When the ladle 1 is equipped with a support 5 at the top of the furnace 10, a portion of the outer wall 2b contacts a portion of the support 5, and a portion of the support 5 is inserted into the recess 3.

[0026] Next, the material of the refractory material 2 for the slag discharge section will be described. It is desirable that the refractory material 2 for the slag discharge section be formed from magnesia carbon brick. The magnesia carbon brick uses magnesia, which has a high melting point of 2852°C, as the main aggregate, and scaly graphite, which is difficult to wet with molten metal and molten slag, and has high thermal conductivity and low thermal expansion. This provides high corrosion resistance, spalling resistance, and slag penetration suppression function. The composition is, for example, 65% to 95% magnesium oxide and 5% to 30% carbon, and the total of magnesium oxide and carbon does not exceed 100%. When the refractory material 2 for the slag discharge section is formed from magnesia carbon brick, it is easy to peel off even if molten slag or molten metal adheres to it and solidifies.

[0027] <Explanation of the pre-shaped refractory material 2 for the slag drain section when installed in ladle 1> Next, with reference to Figure 1, the refractory material 2 for the slag drain section when installed in the ladle 1 will be described. The refractory material 2 for the slag drain section has a recess 3 in which the outer wall portion 2b is recessed toward the inner wall portion 2c. When the ladle 1 is equipped with a support 5 at the top of the furnace 10, and the bottom portion 2a is installed in the slag drain section 11, a part of the outer wall portion 2b comes into contact with a part of the support 5, and a part of the support 5 is inserted into the recess 3.

[0028] The configuration of the ladle 1 will be described later, but as shown in Figure 1, the support member 5 comprises a first contact portion 7, a second contact portion 8, and a protrusion portion 6. The outer wall portion 2b contacts the first contact portion 7 at a position adjacent to the top wall portion 2d, and contacts the second contact portion 8 at a position below the recess portion 3. The protrusion portion 6 enters the recess portion 3. Here, the member formed in the sludge discharge portion 11 described above corresponds to the first contact portion 7 and the second contact portion 8 of the support member 5.

[0029] Next, the relationship between the recess 3 and the protrusion 6 will be explained. As shown in Figure 1, the recess 3 has gaps in the upper, lower, and radial directions of a part of the support 5 when the protrusion 6, which is part of the support 5, is inserted into it.

[0030] Furthermore, as shown in Figure 4, multiple pre-shaped refractory materials 2 for the slag discharge section are arranged along the circumferential direction and installed in the slag discharge section 11. The recesses 3 are continuously connected in the circumferential direction, forming a series of grooves. The protrusions 6 of the support member 5 are formed continuously in the circumferential direction, but they do not interfere with the recesses 3 in the circumferential direction.

[0031] As shown in Figure 1, a steel plate 4 is attached to the side wall portion 2e of the refractory material 2 for the slag discharge section. As shown in Figure 4, multiple refractory materials 2 for the slag discharge section are arranged side by side with the steel plate 4 in between. When molten metal is present in the ladle 1, the heat from the molten metal is transferred to the steel plate 4, causing adjacent refractory materials 2 for the slag discharge section to bond together. Note that mortar may be used between adjacent refractory materials 2 for the slag discharge section.

[0032] <<Effects of the pre-shaped refractory material 2 for the slag discharge section>> The shaped refractory material 2 for the slag discharge section described above provides the following effects. When the shaped refractory material 2 for the slag discharge section is installed in the slag discharge section 11, the outer wall portion 2b is recessed radially inward from the outer shell that forms the outer circumference of the ladle 1 at the top of the furnace 10, so there is no part that protrudes from the outer shell. Even if the outer shell at the top of the furnace 10 comes into contact with an external obstacle, the shaped refractory material 2 for the slag discharge section is recessed inward from the outer shell, so damage due to force majeure can be prevented. In addition, when the shaped refractory material 2 for the slag discharge section is installed in the slag discharge section 11, the height of the top wall portion 2d in the vertical direction is the height of the upper end portion 10a of the ladle 1. Therefore, molten slag etc. in the ladle 1 can be discharged along the top wall portion 2d of the shaped refractory material 2 for the slag discharge section.

[0033] Furthermore, as shown in Figure 1, the refractory material 2 for the slag discharge section is provided with a recess 3 in which the outer wall portion 2b is recessed toward the inner wall portion 2c. When the ladle 1 is equipped with a support 5 at the top of the furnace 10, a portion of the outer wall portion 2b of the refractory material 2 for the slag discharge section is in direct contact with the support 5, and the stress in the outer direction due to heat absorption is received back as a coaxial reaction force, thereby suppressing the occurrence of tilting. In addition, the insertion of a portion of the support 5 into the recess 3 suppresses vertical movement, reducing the likelihood of detachment due to lifting. Thus, the refractory material 2 for the slag discharge section can be prevented from tipping outward by the support 5, and its vertical movement is further restricted, thereby reducing deformation, fracture, or detachment.

[0034] Furthermore, if the refractory material 2 for the slag discharge section is formed from magnesia carbon, it will have the following effects: Even if molten slag or molten metal from the ladle 1 splatters and adheres to the refractory material 2 for the slag discharge section, it will not get wet easily, and even if the molten slag or metal solidifies, it will be easy to peel off. Therefore, the refractory material 2 for the slag discharge section can reduce the process of removing molten slag or metal, thus reducing damage.

[0035] Furthermore, the refractory material 2 for the slag discharge section is formed from magnesia carbon, and when combined with the member formed in the slag discharge section 11 described above, the following effects are obtained. Magnesia carbon has high thermal conductivity, so it has the property of easily transferring heat generated by the molten metal in the ladle 1 to other parts. The refractory material 2 for the slag discharge section is easily heated by the molten metal, so if there is a large contact area with the member formed in the top 10 of the ladle 1, heat will be transferred to the ladle 1, and there is a risk that the top 10 will deform due to thermal expansion. In contrast, a part of the outer wall portion 2b of the refractory material 2 for the slag discharge section is in contact with the support member 5 or the upper end plate 14, which are members formed in the slag discharge section 11, so deformation of the top 10 due to thermal expansion can be reduced.

[0036] Furthermore, as shown in Figure 1, the recess 3 has gaps in the upper, lower, and radial directions when a part of the support 5 is inserted into it. The refractory material 2 for the slag discharge section remains separated from each other even if its thermal expansion coefficient differs from that of the support 5, within a certain range of dimensional changes. Moreover, if deformation such as tilting occurs, the recess 3 comes into contact with a part of the support 5, suppressing further deformation. Therefore, even if the refractory material 2 for the slag discharge section has a different thermal expansion coefficient from that of the support 5, excessive stress can be suppressed, thereby reducing deformation, fracture, or detachment.

[0037] <<Drainer 1 Composition>> Next, the configuration of the ladle 1 according to the second aspect of the present invention will be described. As shown in the example in Figure 1, the ladle 1 comprises a slag removal section 11 at the top of the furnace 10, a shaped refractory material 2 for the slag removal section and a support 5 installed in the slag removal section 11. As already described, the shaped refractory material 2 for the slag removal section comprises a bottom section 2a installed in the slag removal section 11, an outer wall section 2b on the outer circumference side OUT, an inner wall section 2c on the inner circumference side IN, a top wall section 2d facing the bottom section 2a, and a recess 3 in which a part of the outer wall section 2b is recessed toward the inner wall section 2c. The top wall section 2d is on the upper side and the bottom section 2a is on the lower side in the vertical direction.

[0038] As shown in Figures 1 and 2, the refractory material 2 for the slag discharge section has an outer wall portion 2b that is recessed radially inward from the outer shell 12 that forms the outer circumference, and a portion of it is in direct contact with the member formed in the slag discharge section 11. In the vertical direction, the height of the top wall portion 2d is the height of the upper end portion 10a at the top of the furnace 10.

[0039] As shown in Figure 2, the ladle 1 has a cylindrical shape with an open top. The bottom and outer circumference of the side walls of the ladle 1 are covered with an iron shell 12. The side walls are formed on the inside by ware bricks 16, and the space between the iron shell 12 and the ware bricks 16 is formed by perma bricks 20. As shown in Figure 3, the slag drain section 11 is formed in a predetermined area in the circumferential direction at the top of the furnace 10.

[0040] As shown in Figures 1 and 2, the slag discharge section 11 is adjusted in height by adjustment bricks 17 at the installation section 19 where the pre-shaped refractory material 2 for the slag discharge section is installed, so that the height of the pre-shaped refractory material 2 for the slag discharge section matches the height of the upper end 10a of the ladle 1. The adjustment bricks 17 and the bottom 2a of the pre-shaped refractory material 2 for the slag discharge section are in direct contact or in contact via mortar. Alternatively, the pre-shaped refractory material 2 for the slag discharge section may be placed directly on the ware bricks 16 without using the adjustment bricks 17. Furthermore, a highly shrinkable insulating material is not used on the bottom 2a of the pre-shaped refractory material 2 for the slag discharge section in order to minimize the effects of heat.

[0041] Next, with reference to Figures 1 to 4, the relationship between the support member 5 of the ladle 1 and the shaped refractory material 2 for the slag discharge section will be explained. The ladle 1 is equipped with a support member 5 formed in the slag discharge section 11. The shaped refractory material 2 for the slag discharge section is equipped with a recess 3 in which the outer wall portion 2b is recessed toward the inner wall portion 2c. The support member 5 is equipped with a convex portion 6 that protrudes toward the inner circumference IN, a first contact portion 7 located above the convex portion 6 and in contact with the outer wall portion 2b of the shaped refractory material 2 for the slag discharge section, and a second contact portion 8 located below the convex portion 6 and in contact with the outer wall portion 2b of the shaped refractory material 2 for the slag discharge section. The first contact portion 7 is in contact with the outer wall portion 2b of the shaped refractory material 2 for the slag discharge section at a position adjacent to the top wall portion 2d. The second contact portion 8 is in contact with the outer wall portion 2b of the shaped refractory material 2 for the slag discharge section at the lower side of the recess 3. The protruding portion 6 is inserted into the recessed portion 3.

[0042] As shown in Figures 2 and 3, the top of the furnace 10 has an upper end plate 14 formed in the circumferential direction, except for the slag discharge section 11, and a stamping material 13 is formed between the upper end plate 14 and the permer bricks 20 and wear bricks 16. The upper end plate 14 is welded to the iron shell 12 and covers the ladle 1 together with the iron shell 12 which forms the outer shell.

[0043] As shown in Figure 1, the support 5 is made of metal such as steel and has a hollow interior. The first contact portion 7 is formed at the tip of an arm portion 9 that extends diagonally upward at a predetermined angle θ from the upper end 15b of the fixing portion 15, and is set at a height that contacts the top wall portion 2d of the outer wall portion 2b of the refractory material 2 for the slag discharge section. The predetermined angle θ is preferably in the range of 45° to 75°, with 60° being the optimal angle. If the predetermined angle θ is less than 45°, the length of the arm portion 9 becomes longer, and there is a risk of damage during slag discharge. If the predetermined angle θ is greater than 75°, it becomes difficult to obtain resistance when the refractory material 2 for the slag discharge section deforms.

[0044] The protrusion 6 is formed projecting inward from the inner wall 15a of the fixing portion 15 toward the inner circumference IN. The protrusion 6 is on the extension of the upper end 15b of the fixing portion 15. The second contact portion 8 is located on the lower side of the protrusion 6 on the inner wall 15a of the fixing portion 15. The support 5 is welded and fixed to the steel shell 12 by the fixing portion 15.

[0045] Furthermore, as shown in Figure 1, when the convex portion 6 of the ladle 1 is inserted into the concave portion 3, it has gaps in the upper, lower, and radial directions.

[0046] Furthermore, as shown in Figure 1, the area 21 enclosed by the first contact portion 7, the convex portion 6, and the second contact portion 8 of the support 5, and the outer wall portion 2b and the recessed portion 3 of the refractory material 2 for the slag discharge section, is filled with a filler material 18. The filler material 18 may be, for example, an insulating material or an unshaped refractory material.

[0047] Furthermore, as shown in Figures 3 and 4, the slag removal section 11 is formed in a predetermined area in the circumferential direction at the top of the furnace 10. The support member 5 has a convex portion 6, a first contact portion 7, and a second contact portion 8 formed continuously along the circumferential direction. For the pre-shaped refractory material 2 for the slag removal section, which is installed in a row, the convex portion 6 is inserted into the recess 3, and the first contact portion 7 and the second contact portion 8 contact the outer wall portion 2b.

[0048] Furthermore, it is desirable that the refractory material 2 for the slag removal section installed in the ladle 1 be made of magnesia-carbon brick. Details have already been explained.

[0049] <<Effect of Ladle 1>> The configuration of the ladle 1 described above provides the following effects. As shown in Figure 1 as an example, the outer wall portion 2b of the refractory material 2 for the slag discharge section of the ladle 1 is recessed radially inward from the iron shell 12, which is the outer shell that forms the outer circumference of the ladle 1 at the top of the furnace 10. The refractory material 2 for the slag discharge section has no portion that protrudes outward from the outer shell. Even if the outer shell at the top of the furnace 10 comes into contact with an external obstacle, the refractory material 2 for the slag discharge section is recessed inward from the outer shell, so damage due to force majeure can be prevented.

[0050] Furthermore, a portion of the outer wall portion 2b of the pre-shaped refractory material 2 for the slag discharge section is in direct contact with the member formed on the slag discharge section 11. Therefore, the pre-shaped refractory material 2 for the slag discharge section suppresses tilting by receiving the stress in the outer direction due to heat absorption as a coaxial reaction force. In addition, since the convex portion 6 is inserted into the concave portion 3, vertical movement of the pre-shaped refractory material 2 for the slag discharge section is suppressed, and detachment due to lifting can be prevented.

[0051] Furthermore, in the vertical direction, the height of the top wall portion 2d is equal to the height of the upper end portion 10a of the ladle 1. Therefore, molten metal and the like inside the ladle 1 can be discharged along the top wall portion 2d of the refractory material 2 for the slag discharge section.

[0052] Furthermore, as shown in Figure 1, the ladle 1 is in a state where the support 5 is in contact with the outer wall portion 2b of the pre-shaped refractory material 2 for the slag discharge section at the first contact portion 7 and the second contact portion 8, and the convex portion 6 is inserted into the recess portion 3 of the pre-shaped refractory material 2 for the slag discharge section. Therefore, the support 5 can reduce the tilting of the pre-shaped refractory material 2 for the slag discharge section in the outer direction and movement in the vertical direction, thereby suppressing deformation, breakage, or detachment.

[0053] As shown in Figure 1, the arm portion 9 of the support member 5 extends diagonally from the upper end 15b of the fixing portion 15 toward the pre-shaped refractory material 2 for the slag discharge section at a predetermined angle θ, and contacts the outer wall portion 2b at the first contact portion 7. Therefore, when the pre-shaped refractory material 2 for the slag discharge section is about to deform due to the heat of the molten metal, the first contact portion 7 and the second contact portion 8 contact and fix the outer wall portion 2b, thereby receiving the thermal expansion in the outer circumferential direction due to heat absorption from above and below, and suppressing the occurrence of tilting.

[0054] Furthermore, the support member 5 comes into contact with the refractory material 2 for the slag discharge section only at the first contact point 7 and the second contact point 8. Even if the refractory material 2 for the slag discharge section becomes hot due to the heat of the molten metal, heat is not easily transferred to the support member 5. Therefore, heat transfer from the refractory material 2 for the slag discharge section to the support member 5 and the steel shell 12 to which the support member 5 is welded can be reduced, thereby suppressing deformation of the support member 5 and the steel shell 12 due to heat.

[0055] Furthermore, the ladle 1 has gaps in the upper, lower, and radial directions when the convex portion 6 of the support 5 is inserted into the recess 3 of the refractory material 2 for the slag discharge section. Even if the thermal expansion coefficients of the support 5 and the refractory material 2 for the slag discharge section are different, the convex portion 6 and the recess 3 remain separated from each other for a certain range of dimensional changes. Moreover, if deformation occurs due to tilting of the refractory material 2 for the slag discharge section, the convex portion 6 comes into contact with the recess 3, suppressing further deformation. Therefore, even if the support 5 and the refractory material 2 for the slag discharge section expand and contract due to the heat of the molten metal, the generation of excessive stress on each other can be reduced. The ladle 1 can reduce deformation, fracture, or detachment of the refractory material 2 for the slag discharge section.

[0056] Furthermore, the ladle 1 increases the restraining force between the support 5 and the refractory material 2 for the slag discharge section by filling the enclosed area 21 formed when the support 5 comes into contact with the refractory material 2 for the slag discharge section with the filler material 18. Therefore, deformation, breakage, or detachment of the refractory material 2 for the slag discharge section can be reduced.

[0057] Furthermore, in the slag discharge section 11 formed in a predetermined circumferential range of the ladle 1, the support member 5 has a convex portion 6, a first contact portion 7, and a second contact portion 8 that are continuously formed along the circumferential direction, thereby increasing its strength. Since multiple pre-shaped refractory materials 2 for the slag discharge section are installed side by side, the support member 5 and the pre-shaped refractory materials 2 for the slag discharge section are firmly supported by each other, with the convex portion 6 entering the recess 3 and the first contact portion 7 and the second contact portion 8 contacting the outer wall portion 2b. Therefore, the support member 5 can firmly support the pre-shaped refractory materials 2 for the slag discharge section, thereby reducing deformation, breakage, or detachment of the pre-shaped refractory materials 2 for the slag discharge section of the ladle 1.

[0058] Furthermore, the benefits of forming the refractory material 2 for the slag discharge section from magnesia carbon bricks have already been explained. [Explanation of symbols]

[0059] 1 ladle 2. Pre-shaped refractory material for slag discharge section 2a bottom 2b Exterior wall 2c Inner wall 2d Ceiling wall section 2e Side wall part 3 recesses 4 Iron plate 5 Supports 6. Convex part 7 First contact part 8 Second contact part 9 Arm 10 Furnace top 10a Upper end 11 Debris Removal Section 12 Ironhide 13 Stamp material 14 Top end plate 15 Fixed part 15a Inner wall 15b Top edge 16: Ware Brick 17 Adjustment Bricks 18 Filling material 19 Installation part 20 Perma Brick 21 areas 112 Ironhide 118 Patching material 120 retaining bricks IN (Inner Circumference) OUT (Outer perimeter) θ Predetermined angle

Claims

1. The slag discharge section at the top of the furnace, A pre-shaped refractory material for the slag discharge section is installed in the aforementioned slag discharge section, The iron shell that forms the outer shell, The aforementioned waste disposal section is equipped with a support member, The aforementioned debris removal section is formed in a predetermined area in the circumferential direction, The aforementioned refractory material for the slag discharge section is, The waste disposal section includes a bottom portion, an outer wall portion on the outer circumference, an inner wall portion on the inner circumference, a top wall portion facing the bottom portion, and a recess in which a part of the outer wall portion is recessed toward the inner wall portion. The top wall portion is considered the upper side, and the bottom portion is considered the lower side, in the vertical direction. The aforementioned refractory material for the slag discharge section is, The outer wall portion is recessed radially inward from the inner surface of the iron shell that forms the outer perimeter. In the vertical direction, the height of the top wall portion is the height of the upper end portion of the furnace top portion. The aforementioned support is A protrusion that extends toward the inner circumference, A first contact portion located above the aforementioned protrusion and in contact with the outer wall portion of the refractory material for the slag discharge section, A second contact portion is provided below the aforementioned protrusion and in contact with the outer wall portion of the refractory material for the slag discharge section, The first contact portion is located at the tip of an arm that extends diagonally upward at a predetermined angle from the upper end of the fixing portion that is connected to the iron shell, and is set at a height with the top wall portion of the refractory material for the slag discharge section as its upper end. The slag discharge section is formed inward in the radial direction compared to other areas, as the arm portion forms the outer circumference at the top of the furnace. The second contact portion contacts the outer wall portion below the recess of the refractory material for the slag discharge portion, The aforementioned protrusion is a ladle inserted into the aforementioned recess.

2. The ladle according to claim 1, wherein the convex portion has gaps above, below, and in the radial direction when inserted into the recess.

3. The ladle according to claim 1 or 2, wherein the region surrounded by the first contact portion, the convex portion, and the second contact portion of the support, and the outer wall portion and the recess portion of the refractory material for the slag discharge portion, is filled with a filler material.

4. The support member is formed such that the protrusion, the first contact portion, and the second contact portion are continuously formed along the circumferential direction. A ladle according to any one of claims 1 to 3, wherein, with respect to the refractory material for the slag disposal section, which is installed in multiples in a row, the protrusion is inserted into the recess, and the first contact portion and the second contact portion are in contact with the outer wall portion.

5. The ladle according to any one of claims 1 to 4, wherein the refractory material for the slag discharge section is formed of a magnesia carbon brick.

Images