JP3655684B2 - Immersion heater for molten metal - Google Patents

Immersion heater for molten metal Download PDF

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Publication number
JP3655684B2
JP3655684B2 JP35284895A JP35284895A JP3655684B2 JP 3655684 B2 JP3655684 B2 JP 3655684B2 JP 35284895 A JP35284895 A JP 35284895A JP 35284895 A JP35284895 A JP 35284895A JP 3655684 B2 JP3655684 B2 JP 3655684B2
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JP
Japan
Prior art keywords
molten metal
immersion heater
column member
end portion
fitting hole
Prior art date
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JP35284895A
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JPH09185983A (en
Inventor
功 中村
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HAMAMATSU HEAT-TECH CO.,LTD.
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HAMAMATSU HEAT-TECH CO.,LTD.
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  • Vertical, Hearth, Or Arc Furnaces (AREA)

Description

【０００１】
【発明の属する技術分野】
本発明は、例えばアルミニューム合金の溶湯が貯留される溶湯槽内に設置し、該溶湯槽内の溶湯温度を所定温度に昇温又は保持する溶湯金属用浸漬ヒーターに関するものである。
【０００２】
【従来の技術】
従来の技術として、特開平１−３１９２８７号公報に記載されたものがあった。これを図４により説明する。図４において、１は溶湯槽であり、内部にアルミニューム合金の溶湯３が貯留され、上面は天板２により閉塞されている。４は溶湯槽１内に設置した浸漬ヒーターである。この浸漬ヒーター４は、セラミックにより下端部に厚肉の保持部５ａを有する支柱部材５を上下方向に細長く形成し、この保持部５ａに電熱ヒーター７が収容された耐火性の放熱管６を左方に向けて突出固定する。放熱管６はその右端に大径のフランジ部６ａを形成し、このフランジ部６ａを上記保持部５ａに嵌め込んで一体的に固定する。
【０００３】
そして、上記浸漬ヒーター４を溶湯槽１内に収容するとともに、その支柱部材５を側壁１ａから内方に離間させてその上下端を天板２と溶湯槽１の底面１ａとで起立保持し、電熱ヒーター７のリード線７ａを天板２に明けた窓孔２ａから外部に取出し、電源回路（図示省略）に接続して該電熱ヒーター７に通電し、放熱管６を介して溶湯槽１内の溶湯３を所定温度に昇温又は保持する。
【０００４】
【発明が解決しようとする課題】
上記従来のものは、支柱部材５を溶湯槽１の側壁１ａから内方に離間させてその上下端を天板２と溶湯槽１の底面１ａとで起立保持するようにしていたので、支柱部材５の保持力が低下するとともに、支柱部材５が溶湯３に包囲されて加熱され、内部を通過するリード線が熱損傷し易くなる。また、保持部５ａと放熱管６との接合部の接触面積が小さいこと、及び該接合部に応力集中が発生し易いこと等により、放熱管６の保持力が乏しく、収容時に溶湯３が放熱管６に作用する浮力、あるいは取り出し時に溶湯３が放熱管６に作用する抵抗等により上記接合部で折損し易くなる。さらに、天板２が支柱部材５の上端を係止するととに、リード線７ａが天板２を貫通しているので、浸漬ヒーター４の溶湯槽１内への取付け、取外しが困難となり、組付け及び保守点検に手数を要する等の欠点があった。本発明は上記欠点を解消した新規な溶湯金属用浸漬ヒーターを得ることを目的とする。
【０００５】
【課題を解決するための手段】
本発明は、上記目的を達成するために以下の如く構成したものである。即ち、耐火断熱材により上下方向に延びる支柱部材を設け、該支柱部材の下端部に、支柱部材の背面側から正面側に向かう水平方向の嵌合孔を形成するとともに、該嵌合孔は正面側が小径に、背面側が大径となるテーパー状に形成し、電熱ヒーターが収容された細長い耐火性の放熱管を設け、該放熱管を前記支柱部材から正面方向に突出させてその背面側の端部を前記嵌合孔にテーパー嵌合させて一体的に固着し、前記支柱部材の上端部に背面方向に突出して溶湯槽の側壁の上縁に係止する掛け片を一体的に設け、該掛け片とこれが係止する溶湯槽の側壁の上縁とのうち、一方に上下方向の係合孔を設け、他方に係合孔に上下方向に嵌合・離脱可能の係合ピンを設ける構成にしたものである。
この場合、前記支柱部材の下端部に正面方向に突出するボス部を一体的に形成し、支柱部材の背面側から前記ボス部の軸心部を経て正面側に向かう水平方向の嵌合孔を形成することが好ましい。また、前記掛け片は、板金材により箱状に形成するとともに、その正面側の端部を支柱部材の上端部に嵌合させて一体的に固定する構成にするとよい。さらに、前記支柱部材の上部に吊り金具を設けるとよい。
【０００６】
【発明の実施の形態】
以下本発明の実施例を図面に基いて説明する。図面において、図１は本発明による浸漬ヒーターの斜視図、図２は本発明による浸漬ヒーターを溶湯槽に設置した状態の断面図、図３は天板を除去して本発明による浸漬ヒーターを溶湯槽に設置した状態の平面図である。図１において、１０は浸漬ヒーターであり、上下方向に延びる支柱部材１１と、この支柱部材１１の上端から右方（背面方向）に突出する掛け片１５及び支柱部材１１の下端から左方（正面方向）に突出する放熱管２０を一体に有する。
【０００７】
上記支柱部材１１は、アルミナを主成分とする耐火断熱材により直方体状に形成するとともに、その下部に左方に向かって小径となる円錐台状のボス部１２を一体に形成し、図２に示すように、下端部に、支柱部材１１の右面（背面）側から上記ボス部１２の軸心部を経て左面（正面）側に向かう水平方向の嵌合孔１３を貫通形成する。この嵌合孔１３は、左面側が小径に、右面側が大径となるテーパー状に形成する。
【０００８】
また、前述した放熱管２０は、セラミックにより左端が閉塞され、右端が開口する細長い円筒状に形成するととに、右端部２０ａの外径は左部側が小径に、右部側が大径となるテーパー状に形成し、内部に電熱ヒーター２１を収容してなる。この放熱管２０を、支柱部材１１の嵌合孔１３にその右面側から左方に向けて挿通し、その右端部２０ａを上記嵌合孔１３に接着剤１４を介してテーパー嵌合させ、両者を一体的に固着し、嵌合孔１３の左面を埋栓１１ａにより閉塞する。
【０００９】
また、前述した掛け片１５は、後述する溶湯槽２５の側壁２５ａの上縁に係止するものであり、鋼板により下面が開口する箱状に形成するとともに、その左部（正面）１５ａ側を支柱部材１１の上端部に被せて接着剤及び止めボルトにより一体的に固定し、右部（背面）１５ｂ側を支柱部材１１から右方（背面）方向に突出させ、この右部（背面）１５ｂ内の左右中心部に２個のパイプ１６を上下方向に起立させて溶接固定し、該パイプ１６により掛け片１５の右部１５ｂを上下方向に貫通する一対の係合孔１７（図１）を形成する。
【００１０】
上記支柱部材１１の上部、つまり掛け片１５の左部１５ａの上面に一対の吊り金具１８取付け、また、各吊り金具１８間の左部１５ａの上面に端子カバー１９を取付ける。この端子カバー１９は、支柱部材１１の上面に露出させた電熱ヒーター２１の端子部２１ａを包囲してこれを保護するものである。
【００１１】
図２において、２５は溶解炉から流出したアルミニューム合金の溶湯２７を貯留する溶湯槽（保持炉）であり、上面は開閉可能の天板２６により閉塞される。上記溶湯槽２５の側壁２５ａの所定箇所に一対の金属製の係合ピン２８を上方に向けて突出固定する。この係合ピン２８は、前述した掛け片１５の係合孔１７が嵌合・離脱可能となっている。
【００１２】
そして、浸漬ヒーター１０を溶湯槽２５内に設置する際には、吊り金具１８にワイヤを掛け、該ワイヤの上端をクレーン、フォークリフト等の揚上装置に掛けてこの揚上装置により浸漬ヒーター１０を持ち上げて溶湯槽２５内に収容し、掛け片１５を溶湯槽２５の側壁２５ａの上縁に係止するとともに、その係合孔１７を側壁２５ａに起立固定した係合ピン２８に嵌合係止し、支柱部材１１の背面を溶湯槽２５の側壁２５ａの内面に当接させる。次いで天板２６を溶湯槽２５の上面に載置して該上面を閉塞する。なお、上記天板２６は、支柱部材１１の上部及び掛け片１５と対応する箇所に切欠部２６ａを形成し、該切欠部２６ａにより支柱部材１１の上部及び掛け片１５の周囲を包囲する。
【００１３】
【発明の効果】
以上の説明から明らかな如く、本発明によれば、浸漬ヒーターの支柱部材は、その上部に設けた掛け片が溶湯槽の側壁の上縁に係止するとともに、掛け片の係合孔が側壁の係合ピンに嵌合係止し、また、支柱部材の背面が溶湯槽の側壁の内面に当接支持されることになる。このため、浸漬ヒーターが溶湯槽の側壁に強固にかつ安定した状態で係止されることになる。また、放熱管を支柱部材にテーパー嵌合させるようにしたので、両者の接合部の当接面積が大きくなるとともに、応力集中が発生し難くなり、両者の接合強度が高くなる。このため、溶湯による浮力あるいは抵抗に充分耐えることになる。また、支柱部材の背面側が溶湯に浸らなくなり、内部を通過するリード線が熱損傷し難くなる。さらに、掛け片を介して溶湯槽の側壁の上縁に支持されるので、天板の開閉が容易となり、浸漬ヒーター溶湯槽内への取付け・取外し、及び点検・清掃などの保守が安全にしかも迅速に行える等の効果を奏する。
【図面の簡単な説明】
【図１】本発明による浸漬ヒーターの斜視図である。
【図２】本発明による浸漬ヒーターを溶湯槽に設置した状態の断面図である。
【図３】天板を除去して本発明による浸漬ヒーターを溶湯槽に設置した状態の平面図である。
【図４】従来の浸漬ヒーターを溶湯槽に設置した状態の断面図である。
【符号の説明】
１０ 浸漬ヒーター
１１ 支柱部材
１１ａ 埋栓
１２ ボス部
１３ 嵌合孔
１４ 接着剤
１５ 掛け片
１５ａ 左部
１５ｂ 右部
１６ パイプ
１７ 係合孔
１８ 吊り金具
１９ 端子カバー
２０ 放熱管
２０ａ 右端部（背面側）
２１ 電熱ヒーター
２１ａ 端子部
２５ 溶湯槽
２５ａ 側壁
２６ 天板
２７ 溶湯
２８ 係合ピン[0001]
BACKGROUND OF THE INVENTION
The present invention relates to a molten metal immersion heater that is installed, for example, in a molten bath in which a molten aluminum alloy is stored and raises or maintains the molten metal temperature in the molten bath to a predetermined temperature.
[0002]
[Prior art]
As a conventional technique, there is one described in JP-A-1-319287. This will be described with reference to FIG. In FIG. 4, reference numeral 1 denotes a molten metal tank, in which a molten aluminum alloy 3 is stored, and the top surface is closed by a top plate 2. 4 is an immersion heater installed in the molten metal tank 1. This immersion heater 4 is made of ceramic and has a column member 5 having a thick holding portion 5a at its lower end portion that is elongated in the vertical direction. The holding portion 5a has a refractory heat radiating pipe 6 in which an electric heater 7 is accommodated. Fix and protrude toward the direction. The heat radiating tube 6 is formed with a large-diameter flange portion 6a at the right end thereof, and the flange portion 6a is fitted into the holding portion 5a and fixed integrally.
[0003]
And while accommodating the said immersion heater 4 in the molten metal tank 1, the support | pillar member 5 is spaced apart inward from the side wall 1a, and the upper and lower ends are raised and held by the top plate 2 and the bottom surface 1a of the molten metal tank 1, The lead wire 7a of the electric heater 7 is taken out from the window hole 2a opened in the top plate 2, connected to a power supply circuit (not shown), energized to the electric heater 7, and inside the molten metal tank 1 through the heat radiating pipe 6. The molten metal 3 is heated or held at a predetermined temperature.
[0004]
[Problems to be solved by the invention]
In the above conventional apparatus, the column member 5 is spaced inward from the side wall 1a of the molten metal tank 1 and the upper and lower ends thereof are held upright by the top plate 2 and the bottom surface 1a of the molten metal tank 1. As the holding force of the support member 5 decreases, the support member 5 is surrounded by the molten metal 3 and heated, and the lead wires passing through the support member 5 are easily damaged by heat. In addition, the holding area of the heat radiating pipe 6 is poor because the contact area of the joint between the holding part 5a and the heat radiating pipe 6 is small and stress concentration is likely to occur at the joint, and the molten metal 3 radiates heat during housing. The buoyancy acting on the tube 6 or the resistance of the molten metal 3 acting on the heat radiating tube 6 at the time of taking out tends to break at the joint. Furthermore, since the top plate 2 locks the upper end of the column member 5 and the lead wire 7a penetrates the top plate 2, it is difficult to attach and remove the immersion heater 4 from the molten metal tank 1, There were drawbacks such as requiring time and labor for installation and maintenance. An object of the present invention is to obtain a novel immersion heater for molten metal that eliminates the above-mentioned drawbacks.
[0005]
[Means for Solving the Problems]
The present invention is configured as follows to achieve the above object. That is, a pillar member extending in the vertical direction is provided by a fireproof heat insulating material, and a horizontal fitting hole is formed at the lower end portion of the pillar member from the back side to the front side of the pillar member. It is formed into a tapered shape with a small diameter on the side and a large diameter on the back side, and an elongated fire-resistant heat radiation pipe containing an electric heater is provided. A hooking piece that tapers into the fitting hole and is integrally fixed, and is integrally provided with a hanging piece that protrudes in the back direction and engages with the upper edge of the side wall of the molten metal tank at the upper end of the column member, A structure in which an engagement hole in the vertical direction is provided on one of the hanging piece and the upper edge of the side wall of the molten metal tank to which the hook is engaged, and an engagement pin that can be fitted / removed in the vertical direction on the engagement hole is provided on the other side It is a thing.
In this case, a boss portion protruding in the front direction is integrally formed at the lower end portion of the column member, and a horizontal fitting hole extending from the back side of the column member to the front side through the axial center portion of the boss portion is formed. It is preferable to form. Further, the hanging piece is preferably formed in a box shape from a sheet metal material, and is configured to be fixed integrally by fitting the end portion on the front side thereof to the upper end portion of the column member. Furthermore, it is good to provide a hanging metal fitting in the upper part of the said support | pillar member.
[0006]
DETAILED DESCRIPTION OF THE INVENTION
Embodiments of the present invention will be described below with reference to the drawings. In the drawings, FIG. 1 is a perspective view of an immersion heater according to the present invention, FIG. 2 is a cross-sectional view of the immersion heater according to the present invention installed in a molten metal tank, and FIG. It is a top view of the state installed in the tank. In FIG. 1, reference numeral 10 denotes an immersion heater, a column member 11 extending in the vertical direction, a hanging piece 15 protruding rightward (backward direction) from the upper end of the column member 11, and leftward (front) from the lower end of the column member 11. Radiating tube 20 projecting in the direction).
[0007]
The column member 11 is formed in a rectangular parallelepiped shape with a refractory heat insulating material mainly composed of alumina, and a truncated cone-shaped boss portion 12 having a small diameter toward the left is integrally formed at a lower portion thereof. As shown, a horizontal fitting hole 13 is formed through the lower end portion from the right surface (back surface) side of the support column member 11 to the left surface (front surface) side through the axial center portion of the boss portion 12. The fitting hole 13 is formed in a tapered shape having a small diameter on the left side and a large diameter on the right side.
[0008]
Further, the above-described heat radiating tube 20 is formed in an elongated cylindrical shape whose left end is closed by ceramic and whose right end is open, and the outer diameter of the right end portion 20a is a taper having a small diameter on the left side and a large diameter on the right side. The electric heater 21 is accommodated inside. The heat radiating tube 20 is inserted into the fitting hole 13 of the column member 11 from the right surface side to the left, and the right end portion 20a is taper-fitted to the fitting hole 13 with the adhesive 14 therebetween. Are integrally fixed, and the left surface of the fitting hole 13 is closed by the plug 11a.
[0009]
Moreover, the above-mentioned hanging piece 15 is engaged with an upper edge of a side wall 25a of the molten metal tank 25 described later, and is formed in a box shape whose lower surface is opened by a steel plate, and its left (front) 15a side is formed. Covering the upper end of the column member 11 and fixing it integrally with an adhesive and a set bolt, the right part (back surface) 15b is protruded from the column member 11 in the right (back surface) direction, and this right part (back surface) 15b. Two pipes 16 are erected in the vertical direction at the center in the left and right direction and fixed by welding, and a pair of engagement holes 17 (FIG. 1) penetrating the right part 15b of the hanging piece 15 with the pipe 16 in the vertical direction. Form.
[0010]
A pair of hanging metal fittings 18 is attached to the upper part of the column member 11, that is, the upper surface of the left part 15 a of the hanging piece 15, and the terminal cover 19 is attached to the upper surface of the left part 15 a between the hanging metal parts 18. The terminal cover 19 surrounds and protects the terminal portion 21 a of the electric heater 21 exposed on the upper surface of the column member 11.
[0011]
In FIG. 2, reference numeral 25 denotes a molten metal tank (holding furnace) for storing a molten aluminum alloy 27 that has flowed out of the melting furnace, and its upper surface is closed by an openable and closable top plate 26. A pair of metal engagement pins 28 protrude and be fixed upward at predetermined locations on the side wall 25a of the molten metal tank 25. The engagement pin 28 can be fitted and removed from the engagement hole 17 of the above-described hook piece 15.
[0012]
When the immersion heater 10 is installed in the molten metal tank 25, a wire is hung on the hanging metal fitting 18, and the upper end of the wire is hung on a lifting device such as a crane or a forklift. It is lifted and accommodated in the molten metal tank 25, and the hanging piece 15 is locked to the upper edge of the side wall 25 a of the molten metal tank 25, and the engagement hole 17 is fitted and locked to the engagement pin 28 erected and fixed to the side wall 25 a. Then, the back surface of the column member 11 is brought into contact with the inner surface of the side wall 25 a of the molten metal tank 25. Next, the top plate 26 is placed on the upper surface of the molten metal tank 25 to close the upper surface. The top plate 26 is formed with a notch 26 a at a position corresponding to the upper part of the support member 11 and the hanging piece 15, and surrounds the upper part of the supporting member 11 and the periphery of the hanging piece 15 by the notch 26 a.
[0013]
【The invention's effect】
As is apparent from the above description, according to the present invention, the support member of the immersion heater has the hook provided on the top thereof locked to the upper edge of the side wall of the molten metal tank, and the engagement hole of the hook is provided on the side wall. In addition, the back of the support member is abutted and supported by the inner surface of the side wall of the molten metal tank. For this reason, the immersion heater is securely and stably locked to the side wall of the molten metal tank. Further, since the heat radiating tube is taper-fitted to the support member, the contact area of the joint portion between the two becomes large, stress concentration hardly occurs, and the joint strength between the two becomes high. For this reason, it will endure sufficiently the buoyancy or resistance caused by the molten metal. In addition, the back side of the support member is not immersed in the molten metal, and the lead wire passing through the inside becomes difficult to be thermally damaged. In addition, since it is supported on the upper edge of the molten metal side wall via a hanging piece, the top plate can be easily opened and closed, and maintenance such as installation / removal from the immersion heater molten metal tank and inspection / cleaning can be performed safely. There are effects such as being able to be done quickly.
[Brief description of the drawings]
FIG. 1 is a perspective view of an immersion heater according to the present invention.
FIG. 2 is a cross-sectional view of a state in which the immersion heater according to the present invention is installed in a molten metal tank.
FIG. 3 is a plan view of a state in which the top plate is removed and the immersion heater according to the present invention is installed in the molten metal tank.
FIG. 4 is a cross-sectional view of a state in which a conventional immersion heater is installed in a molten metal tank.
[Explanation of symbols]
DESCRIPTION OF SYMBOLS 10 Immersion heater 11 Support | pillar member 11a Plug 12 Boss part 13 Fitting hole 14 Adhesive 15 Hanging piece 15a Left part 15b Right part 16 Pipe 17 Engagement hole 18 Hanging bracket 19 Terminal cover 20 Radiation pipe 20a Right end (rear side)
21 Electric Heater 21a Terminal 25 Molten Bath 25a Side Wall 26 Top Plate 27 Molten Metal 28 Engagement Pin

Claims (4)

耐火断熱材により上下方向に延びる支柱部材（１１）を設け、該支柱部材（１１）の下端部に、支柱部材（１１）の背面側から正面側に向かう水平方向の嵌合孔（１３）を形成するとともに、該嵌合孔（１３）は正面側が小径に、背面側が大径となるテーパー状に形成し、電熱ヒーター（２１）が収容された細長い耐火性の放熱管（２０）を設け、該放熱管（２０）を前記支柱部材（１１）から正面方向に突出させてその背面側の端部を前記嵌合孔（１３）にテーパー嵌合させて一体的に固着し、前記支柱部材（１１）の上端部に背面方向に突出して溶湯槽（２５）の側壁（２５ａ）の上縁に係止する掛け片（１５）を一体的に設け、該掛け片（１５）とこれが係止する溶湯槽（２５）の側壁（２５ａ）の上縁とのうち、一方に上下方向の係合孔（１７）を設け、他方に係合孔（１７）に上下方向に嵌合・離脱可能の係合ピン（２８）を設けたことを特徴とする溶湯金属用浸漬ヒーターA strut member (11) extending in the vertical direction is provided by a refractory heat insulating material, and a horizontal fitting hole (13) from the back side to the front side of the strut member (11) is formed at the lower end of the strut member (11). The fitting hole (13) is formed in a tapered shape having a small diameter on the front side and a large diameter on the back side, and is provided with an elongated fire-resistant heat radiation pipe (20) in which the electric heater (21) is accommodated. The heat radiating pipe (20) is protruded from the column member (11) in the front direction, and the end portion on the back side is taper-fitted into the fitting hole (13) to be integrally fixed, and the column member ( 11) is integrally provided with a hanging piece (15) that protrudes in the rear direction and engages with the upper edge of the side wall (25a) of the molten metal tank (25), and is engaged with the hanging piece (15). Of the upper edge of the side wall (25a) of the molten metal tank (25), one side is in the vertical direction. Hole (17) provided, the molten metal for immersion heater, characterized in that a vertically fitting and removing possible of engaging pins (28) in the engagement hole (17) on the other 前記支柱部材（１１）の下端部に正面方向に突出するボス部（１２）を一体的に形成し、支柱部材（１１）の背面側から前記ボス部（１２）の軸心部を経て正面側に向かう水平方向の嵌合孔（１３）を形成したことを特徴とする請求項１記載の溶湯金属用浸漬ヒーター。A boss portion (12) projecting in the front direction is integrally formed at the lower end portion of the column member (11), and the front side from the back side of the column member (11) through the axial center portion of the boss portion (12). The immersion heater for molten metal according to claim 1, wherein a fitting hole (13) in a horizontal direction toward the surface is formed. 前記掛け片（１５）は、板金材により箱状に形成するとともに、その正面側の端部を支柱部材（１１）の上端部に嵌合させて一体的に固定したことを特徴とする請求項１又は２記載の溶湯金属用浸漬ヒーター。The hook piece (15) is formed in a box shape from a sheet metal material, and an end portion on the front side thereof is fitted to an upper end portion of a column member (11) and fixed integrally. The immersion heater for molten metal according to 1 or 2. 前記支柱部材（１１）の上部に吊り金具（１８）を設けたことを特徴とする請求項１，２又は３記載の溶湯金属用浸漬ヒーター。4. The immersion heater for molten metal according to claim 1, 2 or 3, wherein a suspension fitting (18) is provided on an upper portion of the support member (11).
JP35284895A 1995-12-28 1995-12-28 Immersion heater for molten metal Expired - Fee Related JP3655684B2 (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
JP35284895A JP3655684B2 (en) 1995-12-28 1995-12-28 Immersion heater for molten metal

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
JP35284895A JP3655684B2 (en) 1995-12-28 1995-12-28 Immersion heater for molten metal

Publications (2)

Publication Number Publication Date
JPH09185983A JPH09185983A (en) 1997-07-15
JP3655684B2 true JP3655684B2 (en) 2005-06-02

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Application Number Title Priority Date Filing Date
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Families Citing this family (7)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
WO2009096311A1 (en) * 2008-01-29 2009-08-06 Tounetsu Corporation Dip-type heater
EP2291255A1 (en) * 2008-04-15 2011-03-09 Lethiguel Device for heating a liquid metal bath
JP5555860B2 (en) * 2010-06-23 2014-07-23 内匠 西尾 Immersion heater and method of using immersion heater
JP4914945B1 (en) * 2011-08-10 2012-04-11 日本重化学工業株式会社 Immersion heater
CN104080215A (en) * 2014-07-02 2014-10-01 昆山特丰机电设备有限公司 Non-ferrous metal solution heating bar
DE112015006538B4 (en) * 2015-05-15 2023-06-07 Tounetsu Co., Ltd HEAT PROTECTION TUBE FOR METAL HOLDING FURNACE
MX370940B (en) 2015-05-15 2020-01-10 Tounetsu Co Ltd Molten metal holding furnace.

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