JP7843624B2 - ladle - Google Patents
ladleInfo
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- JP7843624B2 JP7843624B2 JP2022043787A JP2022043787A JP7843624B2 JP 7843624 B2 JP7843624 B2 JP 7843624B2 JP 2022043787 A JP2022043787 A JP 2022043787A JP 2022043787 A JP2022043787 A JP 2022043787A JP 7843624 B2 JP7843624 B2 JP 7843624B2
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- slag discharge
- refractory material
- discharge section
- wall portion
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- Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
- Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
- Y02P—CLIMATE CHANGE MITIGATION TECHNOLOGIES IN THE PRODUCTION OR PROCESSING OF GOODS
- Y02P10/00—Technologies related to metal processing
- Y02P10/20—Recycling
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- Casting Support Devices, Ladles, And Melt Control Thereby (AREA)
- Furnace Housings, Linings, Walls, And Ceilings (AREA)
Description
本発明は、取鍋の排滓部に使用する排滓部用定形耐火物と、排滓部用定形耐火物を含めた取鍋の構造に関する。 This invention relates to a refractory material for use in the slag drain section of a ladle, and to the structure of a ladle including the refractory material for the slag drain section.
従来より、取鍋等の溶融金属保持容器及び押さえレンガが提案されている。例えば、特許文献１の記載によれば、溶融金属保持容器は、鉄皮の開口部の内側に設けられ、レンガ層を上側から押える押さえレンガを備える。押さえレンガの下面における内周側には、下側に突出する凸部が形成され、レンガ層の上面には、凸部が係合された段差部が形成されている。この凸部を含む押さえレンガの下面と、段差部を含むレンガ層の上面との間の目地は、レンガ層の内周面からレンガ層の径方向に延びる水平目地と、この水平目地に対するレンガ層の外周側に位置すると共にレンガ層の高さ方向に延びて水平目地と繋がる垂直目地とを含んで屈曲している。 Conventionally, molten metal holding containers such as ladles and retaining bricks have been proposed. For example, according to Patent Document 1, the molten metal holding container is provided with a retaining brick located inside the opening of the iron shell, which holds the brick layer from above. A protrusion projecting downwards is formed on the inner circumference of the lower surface of the retaining brick, and a stepped portion is formed on the upper surface of the brick layer with the protrusion engaged. The joint between the lower surface of the retaining brick including the protrusion and the upper surface of the brick layer including the stepped portion is curved, including a horizontal joint extending radially from the inner circumference of the brick layer, and a vertical joint located on the outer circumference of the brick layer relative to the horizontal joint, extending in the height direction of the brick layer and connecting to the horizontal joint.
これによれば、水平目地に地金が侵入しても、この水平目地と垂直目地との接続部で地金の侵入を阻止することができる。これにより、地金の侵入に伴う押さえレンガの迫り出しを抑制し、地金が鉄皮に近い側の奥深くまで侵入することを防止できる。この結果、地金を除去する際には、レンガ層のレンガの脱落を防止して、溶融金属が鉄皮に接することを回避できるので、湯漏れの危険性を解消できる、と記載されている。 According to this, even if metal infiltrates the horizontal joint, its intrusion can be prevented at the connection point between the horizontal and vertical joints. This suppresses the protrusion of the retaining bricks due to metal intrusion and prevents the metal from penetrating deep into the area closer to the steel shell. As a result, when removing the metal, it is possible to prevent the bricks in the brick layer from falling out and avoid contact between the molten metal and the steel shell, thus eliminating the risk of molten metal leakage.
しかしながら、従来例では以下の課題がある。特許文献１の例を図示したのが図５である。図５に示すように、押さえレンガ１２０と鉄皮１１２は、パッチング材１１８を介して一体となっている。パッチング材１１８は可縮性が高いため、容器内部の溶融金属による熱によって押さえレンガ１２０が膨張すると、押しつぶされて収縮する。パッチング材１１８は、放冷すると収縮前の寸法よりも小さくなり、鉄皮１１２と押さえレンガ１２０との間に隙間が発生する。隙間が発生すると、押さえレンガ１２０の拘束力が低下し、目地が開いて地金が進入しやすくなる。 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 iron 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, creating a gap between the iron shell 112 and the retaining brick 120. When a gap occurs, the restraining force of the retaining brick 120 decreases, the joint opens, and the base metal can easily penetrate.
押さえレンガ１２０は、受熱により膨張し、冷却によってレンガ間に隙間が生じて拘束力が低下してしまう。その結果、押さえレンガ１２０は再度受熱した際に傾きや上下方向に膨張してしまう。さらに地金が侵入しやすくなることも手伝って局所的な応力が発生しやすくなり、凸部が破断してしまう。よって、仮に凸部があったとしても凸部が破断してしまうという課題があった。 The retaining bricks 120 expand upon 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 expand in a tilted or vertical direction. Furthermore, increased penetration of the base metal contributes to the generation of localized stress, leading to fracture of the protruding sections. Therefore, even if protruding sections exist, there was a problem with them fracturing.
本発明の目的は、従来の課題を解決すべくなされたものであり、変形、破断、或いは脱落を低減する排滓部用定形耐火物、及び取鍋を提供することを目的とする。 The objective 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.
本発明の第一の態様に係る排滓部用定形耐火物は、取鍋の炉頂部における排滓部に設置可能な定形耐火物であって、前記排滓部に設置される底部と、前記取鍋の外周側に相当する外壁部と、前記取鍋の内周側に相当する内壁部と、前記底部と対向する天壁部を備え、前記天壁部を上側とし、前記底部を下側とする上下方向とし、前記排滓部に設置されると、前記外壁部は、前記炉頂部における前記取鍋の外周を形成する外殻よりも径方向の内側へ凹み、一部が前記内壁部の側へ凹む凹部を備え、前記天壁部の高さは、前記取鍋の上端部の高さとなり、前記取鍋が、前記炉頂部において支持具を備えるとき、前記外壁部の一部は、前記支持具の一部と接触し、かつ前記支持具の一部が前記凹部に挿入される。 A refractory mold for a slag drain section according to a first aspect of the present invention is a refractory mold that can be installed in the slag drain section at the top of a ladle, comprising a bottom section installed in the slag drain section, an outer wall section corresponding to the outer circumference of the ladle, an inner wall section corresponding to the inner circumference of the ladle, and a top wall section facing the bottom section. The top wall section is positioned upwards and the bottom section downwards. When installed in the slag drain section, the outer wall section is recessed radially inwards from the outer shell forming the outer circumference of the ladle at the top of the furnace, with a portion recessed toward the inner wall section. The height of the top wall section is equal to the height of the upper end of the ladle. When the ladle is equipped with a support at the top of the furnace, a portion of the outer wall section contacts a portion of the support, and a portion of the support is inserted into the recess.
これによれば、排滓部用定形耐火物は、排滓部に設置されると、外壁部が炉頂部における取鍋の外周を形成する外殻よりも径方向の内側へ凹むので、外殻より飛び出す部分がない。仮に、炉頂部における外殻が外部の障害に接触したとしても、排滓部用定形耐火物は外殻よりも内側へ凹むので不可抗力による損傷を防止できる。また、上下方向において、天壁部の高さは取鍋の上端部の高さとなる。よって、取鍋内の溶融スラグ等は、排滓部用定形耐火物の天壁部に沿わせて排出することができる。 According to this design, when the 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 forming 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, preventing damage due to force majeure. 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 refractory material for the slag discharge section.
また、排滓部用定形耐火物は、外壁部が内壁部の側へ凹む凹部を備える。取鍋が炉頂部において支持具を備えるとき、排滓部用定形耐火物は、外壁部の一部が支持具と直接接触し、受熱による外周方向の応力を同軸の反力として受け返すことで傾きの発生が抑制される。また、凹部へ支持具の一部が挿入されることで上下動の動きが抑制され、浮き上がりによる脱落を低減できる。 Furthermore, the refractory material for the slag discharge section has a recess in the outer wall that curves inward 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 directly contacts the support, and the stress in the outer direction due to heat absorption is returned as a coaxial reaction force, thereby suppressing tilting. Additionally, the insertion of a portion of the support into the recess suppresses vertical movement, reducing the risk of detachment due to lifting.
また、前記排滓部用定形耐火物は、マグネシアカーボン質レンガで形成されてもよい。この場合、排滓部用定形耐火物は、取鍋内の溶融スラグ或いは溶融金属が飛び散って付着したとしても濡れにくく、溶融スラグ或いは溶融金属が凝固しても剥離しやすい。よって、排滓部用定形耐火物は、溶融スラグ或いは溶融金属を除去する工程を低減できるので、損傷を抑えることができる。 Furthermore, the refractory material for the slag discharge section may be formed from 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 easier 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 minimizing damage.
また、前記排滓部用定形耐火物の凹部は、前記支持具の一部が挿入された状態で、該支持具の一部の上側、下側、及び径方向に隙間を有してもよい。この場合、排滓部用定形耐火物は、支持具との熱膨張率が異なっていても、過大な応力が発生することを抑制できるので、変形、破断、或いは脱落を低減することができる。 Furthermore, the recess in the refractory material for the slag discharge section may have gaps above, below, and radially in the area where a portion of the support is inserted. 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.
本発明の第二の態様に係る取鍋は、炉頂部における排滓部と、前記排滓部に設置される排滓部用定形耐火物と、前記排滓部に形成される支持具を備え、前記排滓部用定形耐火物は、前記排滓部に設置される底部と、外周側の外壁部と、内周側の内壁部と、前記底部と対向する天壁部と、前記外壁部の一部が前記内壁部の側へ凹む凹部を備え、前記天壁部を上側とし、前記底部を下側とする上下方向とし、前記排滓部用定形耐火物は、前記外壁部が、外周を形成する外殻よりも径方向の内側へ凹み、上下方向において、前記天壁部の高さが、前記炉頂部における上端部の高さであり、前記支持具は、内周側に向かって突出する凸部と、前記凸部の上側にあって、前記排滓部用定形耐火物の前記外壁部と接触する第一接触部と、前記凸部の下側にあって、前記排滓部用定形耐火物の前記外壁部と接触する第二接触部を備え、前記第一接触部は、前記排滓部用定形耐火物の前記外壁部と、前記天壁部に隣接する位置で接触し、前記第二接触部は、前記排滓部用定形耐火物の前記外壁部と、前記凹部の下側で接触し、前記凸部は、前記凹部に挿入された状態である。 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 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 of the refractory material for the slag discharge section. The first contact portion contacts the outer wall of the refractory material for the slag discharge section at a position adjacent to the top wall, the second contact portion contacts the outer wall of the refractory material for the slag discharge section at the lower side of the recess, and the protrusion is inserted into the recess.
これによれば、取鍋は、排滓部用定形耐火物の外壁部が炉頂部における取鍋の外周を形成する外殻よりも径方向の内側へ凹むので、外殻より飛び出す部分がない。仮に、炉頂部における外殻が外部の障害に接触したとしても、排滓部用定形耐火物は外殻よりも内側へ凹むので不可抗力による損傷を防止できる。上下方向において、天壁部の高さは取鍋の上端部の高さとなる。よって、取鍋内の溶融スラグ等は、排滓部用定形耐火物の天壁部に沿わせて排出することができる。 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 forming 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, preventing damage due to force majeure. 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.
また、取鍋は、支持具が第一接触部と第二接触部にて排滓部用定形耐火物の外壁部に直接接触する。よって、排滓部用定形耐火物は、受熱による外周方向の応力を同軸の反力として受け返すことで傾きの発生が抑制される。また、凸部は凹部へ挿入された状態なので、排滓部用定形耐火物は上下動の動きが抑制され、浮き上がりによる脱落を抑制できる。 Furthermore, the ladle's support directly contacts the outer wall of the refractory material for the slag discharge section at the first and second contact points. Therefore, the refractory material for the slag discharge section suppresses tilting by receiving the circumferential stress caused by heat absorption as a coaxial reaction force. Also, since the convex portion is inserted into the concave portion, vertical movement of the refractory material for the slag discharge section is suppressed, preventing it from floating up and falling off.
また、前記取鍋は、前記凸部が前記凹部に挿入された状態で、上側、下側、及び径方向にそれぞれ隙間を有してもよい。この場合、取鍋は、支持具及び排滓部用定形耐火物が溶融金属の熱によって膨張伸縮したとしても、互いに過大な応力が発生することを低減できる。よって、排滓部用定形耐火物が、変形、破断、或いは脱落を低減することができる。 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.
また、前記取鍋は、前記支持具における前記第一接触部、前記凸部、及び前記第二接触部と、前記排滓部用定形耐火物における前記外壁部及び前記凹部とによって囲われる領域は、充填材によって充填されてもよい。 Furthermore, the area of the ladle enclosed by the first contact portion, the protrusion, 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 section, may be filled with a filler material.
この場合、取鍋は、支持具が排滓部用定形耐火物に接触するときに形成される囲われた空間へ充填材を充填することにより、支持具と排滓部用定形耐火物との間の拘束力が増す。よって、排滓部用定形耐火物が変形、破断、或いは脱落を低減することができる。 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.
また、前記取鍋は、前記排滓部が周方向における所定の範囲に形成され、前記支持具は、前記凸部と前記第一接触部と前記第二接触部が、周方向に沿って連続して形成され、複数個並べて設置される前記排滓部用定形耐火物に対して、前記凸部は前記凹部に挿入され、前記第一接触部及び前記第二接触部が前記外壁部と接触してもよい。 Furthermore, the ladle may have the slag discharge section formed within 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. For the refractory material for the slag discharge section, which is installed in a row of multiple units, the convex portion may be inserted into the recess, and the first and second contact portions may contact the outer wall portion.
この場合、周方向の所定の範囲に形成される排滓部において、支持具は凸部と第一接触部と第二接触部とが周方向に沿って連続的に形成されるので、強度を高めることができる。排滓部用定形耐火物は複数個並べて設置されるので、支持具と排滓部用定形耐火物とは互いに強固な状態で、第一接触部及び第二接触部が外壁部と接触する。よって、支持具は排滓部用定形耐火物を強固に支持することができるので、取鍋の排滓部用定形耐火物は、変形、破断、或いは脱落を低減することができる。 In this case, in the slag discharge section formed within a predetermined circumferential range, the support member has a convex portion, a first contact portion, and a second contact portion 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 attached to each other, with the first and second contact portions contacting the outer wall. Therefore, the support member can firmly support the pre-formed refractory materials for the slag discharge section, reducing deformation, breakage, or detachment of the refractory materials for the slag discharge section of the ladle.
また、前記取鍋の前記排滓部用定形耐火物は、マグネシアカーボン質レンガで形成されてもよい。この場合、排滓部用定形耐火物は、取鍋内の溶融スラグ或いは溶融金属が飛び散って付着したとしても濡れにくく、溶融スラグ或いは溶融金属が凝固しても剥離しやすい。よって、排滓部用定形耐火物は、溶融スラグ或いは溶融金属を除去する工程を低減できるので、損傷を抑えることができる。 Furthermore, the refractory material for the slag drain section of the ladle may be formed from magnesia carbon brick. In this case, the refractory material for the slag drain section is less likely to get wet even if molten slag or molten metal from inside 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 drain section can reduce the process of removing molten slag or molten metal, thus minimizing damage.
以下、図面を参照し、本発明を具現化した排滓部用定形耐火物２、及び取鍋１を説明する。参照する図面は、本発明が採用しうる技術的特徴を説明するために用いられるものである。図面に記載されている装置の構成は、それのみに限定する趣旨ではなく、単なる説明例である。 The following description will refer to the drawings to explain the refractory material 2 for the slag discharge section and the ladle 1, which embody the present invention. The drawings are used to illustrate the technical features that the present invention may employ. The configuration of the apparatus shown in the drawings is not intended to be limiting, but is merely an illustrative example.
＜＜排滓部用定形耐火物２の説明＞＞
図１、図２を参照して、本発明の第一の態様に係る排滓部用定形耐火物２の構成を説明する。排滓部用定形耐火物２は、取鍋１の炉頂部１０における排滓部１１に設置可能な定形耐火物である。排滓部用定形耐火物２は、排滓部１１に設置される底部２ａと、取鍋１の外周側ＯＵＴに相当する外壁部２ｂと、取鍋１の内周側ＩＮに相当する内壁部２ｃと、底部２ａと対向する天壁部２ｄを備える。
<<Explanation of standard-shaped refractory material 2 for the slag discharge section>>
Referring to Figures 1 and 2, the structure of the pre-formed refractory material 2 for the slag drain section according to the first aspect of the present invention will be described. The pre-formed refractory material 2 for the slag drain section is a pre-formed refractory material that can be installed in the slag drain section 11 at the top of the furnace 10 of the ladle 1. The pre-formed refractory material 2 for the slag drain section comprises a bottom portion 2a installed in the slag drain section 11, an outer wall portion 2b corresponding to the outer circumference OUT of the ladle 1, an inner wall portion 2c corresponding to the inner circumference IN of the ladle 1, and a top wall portion 2d facing the bottom portion 2a.
天壁部２ｄを上側とし、底部２ａを下側とする上下方向とする。取鍋１は、後述するように円筒状であり、取鍋１の上下方向に延びる仮想中心軸に対して、外殻に向かう方向を径方向とし、円周方向を周方向とする。排滓部用定形耐火物２が排滓部１１に設置されると、外壁部２ｂは、炉頂部１０における取鍋１の外周を形成する外殻である鉄皮１２よりも径方向の内側へ凹み、一部が内壁部２ｃの側へ凹む凹部３を備える。取鍋１の排滓部１１において、排滓部用定形耐火物２が設置される設置部１９は、調整レンガ１７によって高さ方向が調整される。排滓部用定形耐火物２は、排滓部１１に設置されると、天壁部２ｄの高さが取鍋１の上端部１０ａの高さとなる。取鍋１が、炉頂部１０において支持具５を備えるとき、外壁部２ｂの一部は、支持具５の一部と接触し、かつ支持具５の一部が凹部３に挿入される。 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.
次に、排滓部用定形耐火物２の材質を説明する。排滓部用定形耐火物２は、マグネシアカーボン質レンガで形成されることが望ましい。マグネシアカーボン質レンガは、主骨材として２８５２°Ｃと高い融点をもつマグネシアと、溶融金属、溶融スラグに対して濡れ難く、高い熱伝導性と低熱膨張性を有する鱗状黒鉛を使用する。これにより、高い耐食性、耐スポーリング性、及びスラグ浸潤抑制機能を有する。組成は、例として酸化マグネシウムが６５％から９５％まで、炭素が５％から３０％までで、酸化マグネシウムと炭素の合計が１００％を超えない範囲で構成されている。排滓部用定形耐火物２は、マグネシアカーボン質レンガで形成されると、溶融スラグ或いは溶融金属が付着して凝固したとしても剥離しやすい。 Next, the material of the refractory structure 2 for the slag discharge area will be described. It is desirable that the refractory structure 2 for the slag discharge area 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 poorly wettable to molten metal and molten slag, and possesses high thermal conductivity and low thermal expansion. This provides high corrosion resistance, spalling resistance, and slag penetration suppression. The composition, for example, consists of 65% to 95% magnesium oxide and 5% to 30% carbon, with the total of magnesium oxide and carbon not exceeding 100%. When the refractory structure 2 for the slag discharge area is formed from magnesia-carbon brick, it is easily detached even if molten slag or molten metal adheres to it and solidifies.
＜取鍋１に設置する場合の排滓部用定形耐火物２の説明＞
次に、図１を参照して、取鍋１に設置する場合の排滓部用定形耐火物２を説明する。排滓部用定形耐火物２は、外壁部２ｂが内壁部２ｃの側へ凹む凹部３を備える。取鍋１が、炉頂部１０において支持具５を備えるとき、底部２ａを排滓部１１に設置すると、外壁部２ｂの一部は、支持具５の一部と接触し、かつ支持具５の一部が凹部３に挿入される。
<Explanation of the pre-shaped refractory material 2 for the slag discharge 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.
取鍋１の構成は後述するが、図１に示すように、支持具５は第一接触部７と第二接触部８、及び凸部６を備える。外壁部２ｂは、天壁部２ｄに隣接する位置において第一接触部７と接触し、凹部３の下側の位置で第二接触部８と接触する。凹部３には、凸部６が進入する。ここで、上述した排滓部１１に形成された部材は、支持具５の第一接触部７及び第二接触部８が相当する。 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 3. The protrusion portion 6 enters the recess 3. Here, the member formed in the aforementioned sludge removal portion 11 corresponds to the first contact portion 7 and the second contact portion 8 of the support member 5.
次に、凹部３と凸部６との関係を説明する。図１に示すように、凹部３は、支持具５の一部である凸部６が挿入された状態で、支持具５の一部の上側、下側、及び径方向に隙間を有する。 Next, the relationship between the recess 3 and the protrusion 6 will be explained. As shown in Figure 1, the recess 3 has gaps above, below, and in the radial direction of a part of the support 5 when the protrusion 6, which is part of the support 5, is inserted into it.
また、排滓部用定形耐火物２は、図４に示すように複数個を周方向に沿って並べて排滓部１１に設置する。凹部３は、周方向に連続して繋がり、一連の溝となる。支持具５の凸部６が周方向に連続して形成されているが、周方向において凹部３との間で干渉することはない。 Furthermore, as shown in Figure 4, multiple pre-shaped refractory materials 2 for the slag discharge section are arranged circumferentially and installed in the slag discharge section 11. The recesses 3 are continuously connected circumferentially, forming a series of grooves. Although the protrusions 6 of the support member 5 are formed continuously circumferentially, they do not interfere with the recesses 3 in the circumferential direction.
図１に示すように、排滓部用定形耐火物２の側壁部２ｅには鉄板４が取り付けられている。図４に示すように、複数の排滓部用定形耐火物２が互いに鉄板４を挟んで並べられる。取鍋１内に溶湯金属が存在すると、溶湯金属の熱が鉄板４に伝わることによって、隣り合う排滓部用定形耐火物２同士が結合する。なお、隣り合う排滓部用定形耐火物２同士の間は、モルタルを介してもよい。 As shown in Figure 1, a steel plate 4 is attached to the side wall 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 as a barrier between adjacent refractory materials 2 for the slag discharge section.
＜＜排滓部用定形耐火物２の効果＞＞
以上説明した排滓部用定形耐火物２によれば、以下の効果を奏する。排滓部用定形耐火物２は、排滓部１１に設置されると、外壁部２ｂが炉頂部１０における取鍋１の外周を形成する外殻よりも径方向の内側へ凹むので、外殻より飛び出す部分がない。仮に、炉頂部１０における外殻が外部の障害に接触したとしても、排滓部用定形耐火物２は外殻よりも内側へ凹むので、不可抗力による損傷を防止できる。また、排滓部用定形耐火物２が排滓部１１に設置されると、上下方向において、天壁部２ｄの高さは取鍋１の上端部１０ａの高さとなる。よって、取鍋１内の溶融スラグ等は、排滓部用定形耐火物２の天壁部２ｄに沿わせて排出することができる。
<<Effects of the 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 becomes the height of the upper end portion 10a of the ladle 1. Therefore, molten slag in the ladle 1 can be discharged along the top wall portion 2d of the shaped refractory material 2 for the slag discharge section.
また、図１に示すように、排滓部用定形耐火物２は、外壁部２ｂが内壁部２ｃの側へ凹む凹部３を備える。取鍋１が炉頂部１０において支持具５を備えるとき、排滓部用定形耐火物２は、外壁部２ｂの一部が支持具５と直接接触し、受熱による外周方向の応力を同軸の反力として受け返すことで傾きの発生が抑制される。また、凹部３へ支持具５の一部が挿入されることで上下動の動きが抑制され、浮き上がりによる脱落を低減できる。よって、排滓部用定形耐火物２は、支持具５によって外周方向への倒れを防止し、さらに上下方向への移動を規制することで、変形、破断、或いは脱落を低減することができる。 Furthermore, as shown in Figure 1, the refractory material 2 for the slag discharge 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, 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 detachment due to lifting. Therefore, the refractory material 2 for the slag discharge section can be prevented from tilting in the outer direction by the support 5, and its vertical movement is further restricted, thereby reducing deformation, fracture, or detachment.
また、排滓部用定形耐火物２は、マグネシアカーボン質によって形成されると、以下の効果を奏する。排滓部用定形耐火物２は、取鍋１内の溶融スラグ或いは溶融金属が飛び散って付着したとしても、濡れにくく、溶融スラグ或いは金属が凝固しても剥離しやすい。よって、排滓部用定形耐火物２は、溶融スラグ或いは金属を除去する工程を低減できるので、損傷を抑えることができる。 Furthermore, when the refractory material 2 for the slag discharge section is formed from magnesia carbon, the following effects are achieved: Even if molten slag or metal from the ladle 1 splatters and adheres to the refractory material 2, it is less likely to get wet, and even if the molten slag or metal solidifies, it is easily detached. Therefore, the refractory material 2 for the slag discharge section reduces the process of removing molten slag or metal, thus minimizing damage.
また、排滓部用定形耐火物２は、マグネシアカーボン質によって形成し、さらに上述した排滓部１１に形成された部材と合わせることにより以下の効果がある。マグネシアカーボン質は、伝熱性が高いので取鍋１内の溶湯金属によって発生する熱を他へ伝熱しやすい性質がある。排滓部用定形耐火物２は、溶湯金属からに熱を受けやすいので、仮に取鍋１の炉頂部１０に形成される部材との接触部分が多いと取鍋１へ伝熱してしまい、炉頂部１０が熱膨張によって変形してしまう恐れがある。これに対して、排滓部用定形耐火物２は、外壁部２ｂの一部が、排滓部１１に形成された部材である支持具５或いは上端板１４と接触するので、炉頂部１０が熱膨張によって変形することを低減できる。 Furthermore, the refractory material 2 for the slag discharge section is formed from magnesia carbon, and by combining it with the member formed in the slag discharge section 11 described above, the following effects are achieved. Magnesia carbon has high thermal conductivity, making it easy to transfer heat generated by the molten metal in the ladle 1 to other parts of the material. Since the refractory material 2 for the slag discharge section is easily heated by the molten metal, if there is a large contact area with the member formed on the top 10 of the ladle 1, heat will be transferred to the ladle 1, potentially causing the top 10 to deform due to thermal expansion. In contrast, a portion of the outer wall 2b of the refractory material 2 for the slag discharge section contacts the support 5 or upper end plate 14, which are members formed in the slag discharge section 11, thus reducing deformation of the top 10 due to thermal expansion.
また、図１に示すように、凹部３は支持具５の一部が挿入された状態で、上側、下側、及び径方向に隙間を有する。排滓部用定形耐火物２は、支持具５との熱膨張率が異なっていても一定範囲の寸法変化に対しては互いに離間した状態であり、さらに傾き等の変形が生じると凹部３が支持具５の一部と接触してさらなる変形が抑制される。よって、排滓部用定形耐火物２は、支持具５との熱膨張率が異なっていても、過大な応力が発生することを抑制できるので、変形、破断、或いは脱落を低減することができる。 Furthermore, as shown in Figure 1, the recess 3 has gaps in the upper, lower, and radial directions when a portion of the support 5 is inserted. Even if the thermal expansion coefficients of the refractory material 2 for the slag discharge section differ from those of the support 5, they remain separated from each other within a certain range of dimensional changes. Moreover, if deformation such as tilting occurs, the recess 3 comes into contact with a portion of the support 5, suppressing further deformation. Therefore, even if the thermal expansion coefficients of the refractory material 2 for the slag discharge section differ from those of the support 5, excessive stress can be suppressed, thus reducing deformation, fracture, or detachment.
＜＜取鍋１の構成＞＞
次に、本発明の第二の態様に係る取鍋１の構成を説明する。図１の例に示すように、取鍋１は、炉頂部１０における排滓部１１と、排滓部１１に設置される排滓部用定形耐火物２と支持具５を備える。排滓部用定形耐火物２は、すでに説明したように、排滓部１１に設置される底部２ａと、外周側ＯＵＴの外壁部２ｂと、内周側ＩＮの内壁部２ｃと、底部２ａと対向する天壁部２ｄと、外壁部２ｂの一部が内壁部２ｃの側へ凹む凹部３を備える。天壁部２ｄを上側とし、底部２ａを下側とする上下方向とする。
<<Composition of Ladle 1>>
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 portion 2a installed in the slag removal section 11, an outer wall portion 2b on the outer circumference side OUT, an inner wall portion 2c on the inner circumference side IN, a top wall portion 2d facing the bottom portion 2a, and a recess 3 in which a part of the outer wall portion 2b is recessed toward the inner wall portion 2c. The top wall portion 2d is on the upper side and the bottom portion 2a is on the lower side in the vertical direction.
図１、図２に示すように、排滓部用定形耐火物２は、外壁部２ｂが、外周を形成する外殻である鉄皮１２よりも径方向の内側へ凹み、一部が排滓部１１に形成される部材と直接接触する。上下方向において、天壁部２ｄの高さが、炉頂部１０における上端部１０ａの高さである。 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.
図２に示すように、取鍋１は上部が開口した円筒状の形状である。取鍋１の底と側壁の外周は、鉄皮１２で覆われている。側壁は、内側がウエアレンガ１６によって形成され、鉄皮１２とウエアレンガ１６との間は、パーマレンガ２０によって形成される。図３に示すように、排滓部１１は、炉頂部１０において周方向における所定の範囲に形成される。 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 with ware bricks 16, and the space between the iron shell 12 and the ware bricks 16 is formed with 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.
図１、図２に示すように、排滓部１１は、排滓部用定形耐火物２が設置される設置部１９において、調整レンガ１７によって高さ方向が調整され、排滓部用定形耐火物２の高さが取鍋１の上端部１０ａの高さに一致する。調整レンガ１７と排滓部用定形耐火物２の底部２ａとの間は、直接接しているか、或いはモルタルを介して接している。尚、調整レンガ１７を使用せず、排滓部用定形耐火物２が直接ウエアレンガ１６に載置されてもよい。また、排滓部用定形耐火物２の底部２ａには可縮性が高い断熱材は使用しない。熱による影響を少なくするためである。 As shown in Figures 1 and 2, the slag discharge section 11 is positioned in an installation section 19 where the pre-shaped refractory material 2 for the slag discharge section is installed. The height of the pre-shaped refractory material 2 is adjusted by adjustment bricks 17, so that it 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 are either in direct contact or connected via mortar. Alternatively, the pre-shaped refractory material 2 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 to minimize the effects of heat.
次に、図１から図４までを参照して、取鍋１の支持具５と排滓部用定形耐火物２との関係を説明する。取鍋１は、排滓部１１に形成される支持具５を備える。排滓部用定形耐火物２は、外壁部２ｂが内壁部２ｃの側へ凹む凹部３を備える。支持具５は、内周側ＩＮに向かって突出する凸部６と、凸部６の上側にあって、排滓部用定形耐火物２の外壁部２ｂと接触する第一接触部７と、凸部６の下側にあって、排滓部用定形耐火物２の外壁部２ｂと接触する第二接触部８を備える。第一接触部７は、排滓部用定形耐火物２の外壁部２ｂと、天壁部２ｄに隣接する位置で接触する。第二接触部８は、排滓部用定形耐火物２の外壁部２ｂと、凹部３の下側で接触する。凸部６は、凹部３に挿入された状態である。 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 contacts 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 contacts 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.
図２及び図３に示すように、炉頂部１０は、排滓部１１を除いて周方向に上端板１４が形成され、上端板１４とパーマレンガ２０及びウエアレンガ１６との間は、スタンプ材１３が成形されている。上端板１４は、鉄皮１２に溶接され、外殻を形成する鉄皮１２と共に取鍋１を覆っている。 As shown in Figures 2 and 3, the furnace top 10 has an upper end plate 14 formed circumferentially, excluding the slag removal section 11. 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, together with the iron shell 12 forming the outer shell, covers the ladle 1.
図１に示すように、支持具５は、鉄鋼材料等の金属で形成され、内部が空洞の構成である。第一接触部７は、固定部１５の上端１５ｂから所定角度θ斜め上側に延びる腕部９の先端に形成され、排滓部用定形耐火物２の外壁部２ｂの天壁部２ｄ付近に接する高さに設定される。所定角度θは４５°から７５°の範囲が好ましく、６０°が最適な角度である。所定角度θが４５°未満の場合、腕部９の長さが長くなり、排滓時に損傷する恐れがある。所定角度θが７５°よりも大きいと、排滓部用定形耐火物２が変形したときの抗力を得にくくなる。 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 the arm portion 9, which 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 vicinity of 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 force when the refractory material 2 for the slag discharge section deforms.
凸部６は、固定部１５の内壁１５ａから内周側ＩＮに向かって突出して形成される。凸部６は固定部１５の上端１５ｂの延長上にある。第二接触部８は、固定部１５の内壁１５ａのうち凸部６の下側に位置する。支持具５は、固定部１５が鉄皮１２に溶接固定される。 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 lies on the extension of the upper end 15b of the fixing portion 15. The second contact portion 8 is located below 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.
また、図１に示すように、取鍋１の凸部６は、凹部３に進入した状態で、上側、下側、及び径方向に隙間を有する。 Furthermore, as shown in Figure 1, the convex portion 6 of the ladle 1 has gaps in the upper, lower, and radial directions when it is inserted into the recess 3.
また、図１に示すように、支持具５における第一接触部７、凸部６、及び第二接触部８と、排滓部用定形耐火物２における外壁部２ｂ及び凹部３とによって囲われる領域２１は、充填材１８によって充填されている。充填材１８は、例として断熱材或いは不定形耐火物を使用する。 Furthermore, as shown in Figure 1, the region 21 enclosed by the first contact portion 7, the protrusion portion 6, and the second contact portion 8 of the support member 5, and the outer wall portion 2b and the recess 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.
また、図３及び図４に示すように、排滓部１１は、炉頂部１０において周方向における所定の範囲に形成される。支持具５は、凸部６と第一接触部７と第二接触部８が、周方向に沿って連続して形成される。複数個並べて設置される排滓部用定形耐火物２に対して、凸部６は凹部３に挿入され、第一接触部７及び第二接触部８が外壁部２ｂと接触する。 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.
また、取鍋１に設置される排滓部用定形耐火物２は、マグネシアカーボン質レンガで形成されることが望ましい。詳細は、すでに説明したとおりである。 Furthermore, the refractory material 2 for the slag removal section installed in the ladle 1 is preferably made of magnesia-carbon brick. Details have already been explained.
＜＜取鍋１の効果＞＞
以上説明した取鍋１の構成によれば、以下の効果を奏する。図１を例に示すように、取鍋１は、排滓部用定形耐火物２の外壁部２ｂが炉頂部１０における取鍋１の外周を形成する外殻である鉄皮１２よりも径方向の内側へ凹む。排滓部用定形耐火物２は、外殻より外周側へ飛び出す部分がない。仮に、炉頂部１０における外殻が外部の障害に接触したとしても、排滓部用定形耐火物２は外殻よりも内側へ凹むので不可抗力による損傷を防止できる。
<<Effects 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.
また、排滓部用定形耐火物２は、外壁部２ｂの一部が排滓部１１に形成された部材と直接接触する。よって、排滓部用定形耐火物２は、受熱による外周方向の応力を同軸の反力として受け返すことで傾きの発生が抑制される。また、凸部６は凹部３へ挿入された状態なので、排滓部用定形耐火物２は上下動の動きが抑制され、浮き上がりによる脱落を抑制できる。 Furthermore, a portion of the outer wall portion 2b of the refractory material 2 for the slag discharge section is in direct contact with the member formed on the slag discharge section 11. Therefore, the 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. Also, since the convex portion 6 is inserted into the concave portion 3, vertical movement of the refractory material 2 for the slag discharge section is suppressed, preventing it from floating up and falling off.
さらに、上下方向において、天壁部２ｄの高さは取鍋１の上端部１０ａの高さとなる。よって、取鍋１内の溶湯金属等は、排滓部用定形耐火物２の天壁部２ｄに沿わせて排出することができる。 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, the molten metal in the ladle 1 can be discharged along the top wall portion 2d of the refractory material 2 for the slag discharge section.
また、図１に示すように、取鍋１は、支持具５が第一接触部７と第二接触部８にて排滓部用定形耐火物２の外壁部２ｂに接触し、凸部６が排滓部用定形耐火物２の凹部３に挿入された状態である。よって、支持具５は排滓部用定形耐火物２が外周方向へ倒れることと、上下方向に移動することを低減し、変形、破断、或いは脱落を抑制することができる。 Furthermore, as shown in Figure 1, the ladle 1 is in a state where the support 5 contacts the outer wall portion 2b of the 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 refractory material 2 for the slag discharge section. Therefore, the support 5 reduces the tilting of the refractory material 2 for the slag discharge section in the outer circumferential direction and vertical movement, thereby suppressing deformation, breakage, or detachment.
図１に示すように、支持具５の腕部９は、固定部１５の上端１５ｂから排滓部用定形耐火物２に向かって所定角度θを有して斜めに延び、第一接触部７にて外壁部２ｂと接触する。よって、溶融金属の熱等によって排滓部用定形耐火物２が変形しようとしたとき、第一接触部７と第二接触部８が外壁部２ｂに接触して固定することで、受熱による外周方向の熱膨張を上下で受けることができ、傾きの発生を抑制することができる。 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 attempts to deform due to the heat of molten metal, etc., the first contact portion 7 and the second contact portion 8 contact and fix the outer wall portion 2b, allowing the thermal expansion in the outer circumferential direction due to heat absorption to be received from above and below, thereby suppressing the occurrence of tilting.
また、支持具５は、排滓部用定形耐火物２と接触するのは、第一接触部７と第二接触部８のみである。溶湯金属の熱によって排滓部用定形耐火物２が高温になったとしても、支持具５には伝熱されにくい。よって、排滓部用定形耐火物２から支持具５及び支持具５が溶接される鉄皮１２へ伝熱されることを低減できるので、支持具５及び鉄皮１２が熱によって変形することを抑制できる。 Furthermore, the support member 5 only comes into contact with the refractory material 2 for the slag discharge section 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 to the support member 5 and the iron shell 12 to which the support member 5 is welded can be reduced, thus suppressing deformation of the support member 5 and the iron shell 12 due to heat.
また、取鍋１は、支持具５の凸部６が排滓部用定形耐火物２の凹部３に挿入された状態で上側、下側、及び径方向に隙間を有する。支持具５と排滓部用定形耐火物２との熱膨張率が異なっていても、凸部６と凹部３とは一定範囲の寸法変化に対しては互いに離間した状態である。さらに排滓部用定形耐火物２の傾き等によって変形が生じると、凸部６が凹部３と接触してさらなる変形が抑制される。よって、支持具５及び排滓部用定形耐火物２が溶融金属の熱によって膨張伸縮したとしても、互いに過大な応力が発生することを低減できる。取鍋１は、排滓部用定形耐火物２が、変形、破断、或いは脱落を低減することができる。 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 within 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.
また、取鍋１は、支持具５が排滓部用定形耐火物２に接触するときに形成される囲われる領域２１へ充填材１８を充填することにより、支持具５と排滓部用定形耐火物２との間の拘束力が増す。よって、排滓部用定形耐火物２が変形、破断、或いは脱落を低減することができる。 Furthermore, by filling the enclosed area 21 formed when the support 5 contacts the refractory material 2 for the slag discharge section with filler material 18, the restraining force between the support 5 and the refractory material 2 for the slag discharge section is increased. Therefore, deformation, breakage, or detachment of the refractory material 2 for the slag discharge section can be reduced.
また、取鍋１は、周方向の所定の範囲に形成される排滓部１１において、支持具５は凸部６と第一接触部７と第二接触部８とが周方向に沿って連続的に形成されるので、強度を高めることができる。排滓部用定形耐火物２は複数個並べて設置されるので、支持具５と排滓部用定形耐火物２とは互いに強固な状態で、凸部６は凹部３に進入し、第一接触部７及び第二接触部８が外壁部２ｂと接触する。よって、支持具５は排滓部用定形耐火物２を強固に支持することができるので、取鍋１の排滓部用定形耐火物２は、変形、破断、或いは脱落を低減することができる。 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 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. The convex portion 6 enters the recess 3, and the first contact portion 7 and the second contact portion 8 contact the outer wall portion 2b. Therefore, the support member 5 can firmly support the pre-shaped refractory materials 2 for the slag discharge section, thus reducing deformation, breakage, or detachment of the pre-shaped refractory materials 2 for the slag discharge section of the ladle 1.
また、排滓部用定形耐火物２はマグネシアカーボン質レンガで形成されることによる効果は、すでに説明したとおりである。 Furthermore, the benefits of forming the refractory material 2 for the slag discharge section from magnesia-carbon bricks have already been explained.
１ 取鍋
２ 排滓部用定形耐火物
２ａ 底部
２ｂ 外壁部
２ｃ 内壁部
２ｄ 天壁部
２ｅ 側壁部
３ 凹部
４ 鉄板
５ 支持具
６ 凸部
７ 第一接触部
８ 第二接触部
９ 腕部
１０ 炉頂部
１０ａ 上端部
１１ 排滓部
１２ 鉄皮
１３ スタンプ材
１４ 上端板
１５ 固定部
１５ａ 内壁
１５ｂ 上端
１６ ：ウエアレンガ
１７ 調整レンガ
１８ 充填材
１９ 設置部
２０ パーマレンガ
２１ 領域
１１２ 鉄皮
１１８ パッチング材
１２０ 押さえレンガ
ＩＮ 内周側
ＯＵＴ 外周側
θ 所定角度
1 Ladle 2 Shaped refractory material for slag discharge section 2a Bottom section 2b Outer wall section 2c Inner wall section 2d Top wall section 2e Side wall section 3 Recessed section 4 Iron plate 5 Support 6 Protruding section 7 First contact section 8 Second contact section 9 Arm section 10 Furnace top section 10a Upper end section 11 Slag discharge section 12 Iron shell 13 Stamping material 14 Upper end plate 15 Fixing section 15a Inner wall 15b Upper end 16 : Wear brick 17 Adjustment brick 18 Filling material 19 Installation section 20 Perma brick 21 Area 112 Iron shell 118 Patching material 120 Retaining brick IN Inner circumference OUT Outer circumference θ Determined angle
Claims (5)
前記排滓部に設置される排滓部用定形耐火物と、
外殻を形成する鉄皮と、
前記排滓部に形成される支持具を備え、
前記排滓部は、周方向における所定の範囲に形成され、
前記排滓部用定形耐火物は、
前記排滓部に設置される底部と、外周側の外壁部と、内周側の内壁部と、前記底部と対向する天壁部と、前記外壁部の一部が前記内壁部の側へ凹む凹部を備え、
前記天壁部を上側とし、前記底部を下側とする上下方向とし、
前記排滓部用定形耐火物は、
前記外壁部が、外周を形成する前記鉄皮の内側面よりも径方向の内側へ凹み、
上下方向において、前記天壁部の高さが、前記炉頂部における上端部の高さであり、
前記支持具は、
内周側に向かって突出する凸部と、
前記凸部の上側にあって、前記排滓部用定形耐火物の前記外壁部と接触する第一接触部と、
前記凸部の下側にあって、前記排滓部用定形耐火物の前記外壁部と接触する第二接触部を備え、
前記第一接触部は、前記鉄皮と結合される固定部のうち前記炉頂部よりも下側に位置する上端から所定角度斜め上側に延びる腕部の先端にあって、前記排滓部用定形耐火物の前記天壁部を上端とする高さに設定され、
前記排滓部は、前記炉頂部において前記腕部が外周を形成することで、他の領域よりも径方向の内側に凹んで形成され、
前記第二接触部は、前記排滓部用定形耐火物の前記凹部の下側で前記外壁部と接触し、
前記凸部は、前記凹部に挿入された状態である取鍋。 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 comprises 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.
複数個並べて設置される前記排滓部用定形耐火物に対して、前記凸部は前記凹部に挿入され、前記第一接触部及び前記第二接触部が前記外壁部と接触する請求項１から３のいずれかに記載の取鍋。 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.
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP2022043787A JP7843624B2 (en) | 2022-03-18 | 2022-03-18 | ladle |
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP2022043787A JP7843624B2 (en) | 2022-03-18 | 2022-03-18 | ladle |
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| JP2023137536A JP2023137536A (en) | 2023-09-29 |
| JP7843624B2 true JP7843624B2 (en) | 2026-04-10 |
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| Application Number | Title | Priority Date | Filing Date |
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| JP2022043787A Active JP7843624B2 (en) | 2022-03-18 | 2022-03-18 | ladle |
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Citations (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JP2009012015A (en) | 2007-07-02 | 2009-01-22 | Nippon Steel Corp | Ladle |
| JP2016114317A (en) | 2014-12-16 | 2016-06-23 | 新日鐵住金株式会社 | Electric furnace for melting and processing steel making slug |
| JP2019135065A (en) | 2018-02-05 | 2019-08-15 | 日本製鉄株式会社 | Molten metal holding vessel and presser brick |
Family Cites Families (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPS62203662A (en) * | 1986-03-04 | 1987-09-08 | Nippon Kokan Kk <Nkk> | Molten metal storage container |
| JPH0293063U (en) * | 1988-12-29 | 1990-07-24 | ||
| JP3469035B2 (en) * | 1997-02-26 | 2003-11-25 | 新日本製鐵株式会社 | Insulation lid for molten metal pot |
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2022
- 2022-03-18 JP JP2022043787A patent/JP7843624B2/en active Active
Patent Citations (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JP2009012015A (en) | 2007-07-02 | 2009-01-22 | Nippon Steel Corp | Ladle |
| JP2016114317A (en) | 2014-12-16 | 2016-06-23 | 新日鐵住金株式会社 | Electric furnace for melting and processing steel making slug |
| JP2019135065A (en) | 2018-02-05 | 2019-08-15 | 日本製鉄株式会社 | Molten metal holding vessel and presser brick |
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| Publication number | Publication date |
|---|---|
| JP2023137536A (en) | 2023-09-29 |
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