JP2015024429A - Electrode in ladle preheater - Google Patents
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- 239000011261 inert gas Substances 0.000 claims abstract description 27
- OKTJSMMVPCPJKN-UHFFFAOYSA-N Carbon Chemical compound [C] OKTJSMMVPCPJKN-UHFFFAOYSA-N 0.000 description 10
- 229910052799 carbon Inorganic materials 0.000 description 10
- 238000010438 heat treatment Methods 0.000 description 7
- QVGXLLKOCUKJST-UHFFFAOYSA-N atomic oxygen Chemical compound [O] QVGXLLKOCUKJST-UHFFFAOYSA-N 0.000 description 6
- 239000001301 oxygen Substances 0.000 description 6
- 229910052760 oxygen Inorganic materials 0.000 description 6
- XKRFYHLGVUSROY-UHFFFAOYSA-N Argon Chemical compound [Ar] XKRFYHLGVUSROY-UHFFFAOYSA-N 0.000 description 2
- 239000002184 metal Substances 0.000 description 2
- IJGRMHOSHXDMSA-UHFFFAOYSA-N Atomic nitrogen Chemical compound N#N IJGRMHOSHXDMSA-UHFFFAOYSA-N 0.000 description 1
- 229910000831 Steel Inorganic materials 0.000 description 1
- 229910052786 argon Inorganic materials 0.000 description 1
- 230000008033 biological extinction Effects 0.000 description 1
- 238000005266 casting Methods 0.000 description 1
- 238000002485 combustion reaction Methods 0.000 description 1
- 229910001873 dinitrogen Inorganic materials 0.000 description 1
- 239000000428 dust Substances 0.000 description 1
- 239000000446 fuel Substances 0.000 description 1
- 239000000295 fuel oil Substances 0.000 description 1
- 239000007789 gas Substances 0.000 description 1
- 238000012423 maintenance Methods 0.000 description 1
- 238000004519 manufacturing process Methods 0.000 description 1
- VNWKTOKETHGBQD-UHFFFAOYSA-N methane Chemical compound C VNWKTOKETHGBQD-UHFFFAOYSA-N 0.000 description 1
- 238000000034 method Methods 0.000 description 1
- 230000003647 oxidation Effects 0.000 description 1
- 238000007254 oxidation reaction Methods 0.000 description 1
- 230000006641 stabilisation Effects 0.000 description 1
- 238000011105 stabilization Methods 0.000 description 1
- 239000010959 steel Substances 0.000 description 1
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- Casting Support Devices, Ladles, And Melt Control Thereby (AREA)
Abstract
Description
本発明は、鋳造工場で使用される取鍋予熱装置に用いられるカーボン電極に関する。 The present invention relates to a carbon electrode used in a ladle preheating device used in a foundry.
取鍋は、鋳造品を製造するための溶湯を、鋳造鋳型まで搬送するための容器として用いられ、溶湯の急激な温度低下を防ぐために予熱を加える必要がある。従来、取鍋の予熱には、ガスや重油等を燃料としたバーナーの燃焼エネルギーが用いられていた。しかし、この手法ではバーナーの加熱エネルギーが放散されたり、熱気や粉塵が放出されたり、エネルギー効率や工場内環境の悪化を招くなどの問題がある。そのため、特許文献１では、開口部を密閉して双極の電極を装入し、電極間にアークを発生させて取鍋内部を加熱する取鍋予熱装置が提案されており、工場内環境を良好に保ちつつ加熱エネルギーの効率化も図られている。 The ladle is used as a container for transporting a molten metal for producing a cast product to a casting mold, and needs to be preheated to prevent a rapid temperature drop of the molten metal. Conventionally, the combustion energy of a burner using gas or heavy oil as fuel has been used for preheating the ladle. However, this method has problems such as that the heating energy of the burner is dissipated, hot air and dust are released, and energy efficiency and factory environment are deteriorated. For this reason, Patent Document 1 proposes a ladle preheating device that seals the opening, inserts bipolar electrodes, generates an arc between the electrodes, and heats the inside of the ladle. The heating energy is also made more efficient while maintaining the temperature.
図５は、従来の取鍋予熱装置の電極部分を簡略化して示す正面図である。 FIG. 5: is a front view which simplifies and shows the electrode part of the conventional ladle preheating apparatus.
取鍋内には、陽極電極１１と陰極電極１２の双極のカーボン電極が装入され、双極間で比較的高い負荷電圧により高温のアークを発生、持続させ、その輻射熱を利用することで取鍋内壁を予熱する。陰極電極１２は先端に陰極電極板１３を備えたＬ字型で、陽極電極１１を昇降させる電極駆動装置によって陽極電極１１を陰極電極板１３に近接させたり、離反させたりすることで、アークの発生・消滅を制御可能にしている。 In the ladle, a bipolar carbon electrode of the anode electrode 11 and the cathode electrode 12 is inserted, and a high temperature arc is generated and maintained between the bipolar electrodes by a relatively high load voltage, and the radiant heat is used to make the ladle. Preheat the inner wall. The cathode electrode 12 is L-shaped with a cathode electrode plate 13 at the tip, and the anode electrode 11 is brought close to or separated from the cathode electrode plate 13 by an electrode driving device that moves the anode electrode 11 up and down. Generation and extinction can be controlled.
しかしながら、上記従来の電極構造では、アークの発生により高温となる部分が陽極電極の先端と陰極電極板表面になるため、比較的安価な陽極電極のみならず高価な陰極電極板まで損耗してしまうという問題がある。図５において、斜線は、損耗した箇所であり、陰極電極板１３のアーク発生部分の付近が損耗していることが示されている。 However, in the above conventional electrode structure, the portion that becomes high temperature due to the generation of the arc becomes the tip of the anode electrode and the surface of the cathode electrode plate, so that not only a relatively inexpensive anode electrode but also an expensive cathode electrode plate are worn out. There is a problem. In FIG. 5, the hatched portion is a worn portion, and it is shown that the vicinity of the arc generation portion of the cathode electrode plate 13 is worn.
また、カーボン電極の損耗を低減させるには、アークが発生する電極付近の酸素を減らすことが有効であるところ、取鍋内部全体に不活性ガスを充満させることは操作性や保全性、ランニングコストの悪化を招いてしまう。 In order to reduce the wear and tear of the carbon electrode, it is effective to reduce the oxygen near the electrode where the arc is generated. Filling the entire inside of the ladle with an inert gas is easy to operate, maintain and run. Will worsen.
電極付近にのみ不活性ガスを供給することも考えられるが、不活性ガスを供給するノズルを、急速に高温となるアーク発生部近くに配置しなければならず、急激な加熱によりノズルが破損してしまうという問題を引き起こす。破損を避けるためにアーク発生部から離れたところにノズルを配置すれば、不活性ガスの供給量が増えて効率性に欠け、取鍋内部全体に不活性ガスを充満させることと大差のない結果になる。 It is conceivable to supply an inert gas only near the electrode, but the nozzle that supplies the inert gas must be placed near the arc generating part where the temperature rapidly rises, and the nozzle is damaged by rapid heating. Cause problems. If the nozzle is placed away from the arc generation part to avoid breakage, the amount of inert gas supplied will increase and efficiency will be poor, and the result will not be much different from filling the entire ladle with inert gas become.
そこで、本発明は、上記課題に鑑みなされたものであり、高価な電極の損耗を抑制して、長寿命化を実現することができる取鍋予熱装置における電極を提供することを目的とする。 Then, this invention is made | formed in view of the said subject, and it aims at providing the electrode in the ladle preheating apparatus which can suppress the wear of an expensive electrode and can implement | achieve a lifetime improvement.
上記の課題を解決するため、本発明に係る取鍋予熱装置における電極は、取鍋内に並行して垂下される陰極電極棒および陽極電極棒と、前記陰極電極棒の先端に接続され、水平方向に前記陽極電極棒の下方まで延びる板状部材の陰極電極板と、前記陰極電極板の陽極電極棒と相対する位置に、陽極電極棒へ向かって突出する陰極凸状部と、前記陰極電極棒または／および陽極電極棒の内部を中空として構成され、不活性ガスを通過させる通気管と、前記陽極電極棒と前記陰極凸状部とに挟まれた空間へ向けて、前記通気管を通過する不活性ガスを供給する吹出口とを備えることを特徴とする。 In order to solve the above problems, the electrode in the ladle preheating apparatus according to the present invention is connected to the cathode electrode rod and the anode electrode rod suspended in parallel in the ladle, and the tip of the cathode electrode rod, A cathode electrode plate of a plate-like member extending in the direction below the anode electrode rod, a cathode convex portion projecting toward the anode electrode rod at a position facing the anode electrode rod of the cathode electrode plate, and the cathode electrode The inside of the rod or / and the anode electrode rod is hollow, and passes through the vent tube toward the space between the anode electrode rod and the cathode convex portion, and the vent tube allowing the inert gas to pass therethrough And an air outlet for supplying an inert gas.
これによれば、陰極全体を鉤型に構成して、陰極凸状部と陽極電極との間をアーク発生部分とするので、高価な陰極電極板や陰極電極の損耗を抑制することが可能となる。また、電極内部を中空として不活性ガスを通し、アーク発生部分の近くに不活性ガスの吹出口を設けることで、不活性ガスをアーク発生部分付近へ効率よく供給して酸素の低減を図ることができ、電極損耗の低減そして電極の長寿命化を実現することができる。 According to this, since the entire cathode is configured in a bowl shape and an arc generation portion is formed between the cathode convex portion and the anode electrode, wear of expensive cathode electrode plates and cathode electrodes can be suppressed. Become. In addition, it is possible to reduce the oxygen by efficiently supplying the inert gas to the vicinity of the arc generation part by providing the inert gas through the inside of the electrode and passing the inert gas near the arc generation part. Thus, electrode wear can be reduced and the life of the electrode can be extended.
ここで、前記陰極凸状部は、陽極電極棒へ向かって狭まるテーパー形状であるのが好ましい。 Here, it is preferable that the cathode convex portion has a tapered shape that narrows toward the anode electrode rod.
これによれば、陰極凸状部の交換頻度を抑えられるので、メンテナンスコストを削減することができる。 According to this, since the replacement frequency of the cathode convex portion can be suppressed, the maintenance cost can be reduced.
さらに、前記陰極電極棒、前記陰極電極板および前記陰極凸状部と前記陽極電極棒との極性を入れ替える極性入替手段を備えるのが好ましい。 Furthermore, it is preferable that the cathode electrode bar, the cathode electrode plate, and polarity replacing means for switching the polarity of the cathode convex portion and the anode electrode rod are provided.
これによれば、陰極と陽極とを極性入替することで、発生させたアークの安定化を図り、加熱能力の向上を実現することができる。 According to this, by switching the polarity of the cathode and the anode, it is possible to stabilize the generated arc and to improve the heating capability.
このように、本発明に係る取鍋予熱装置における電極によれば、陰極を、垂下される陰極電極、陰極電極の先端から水平方向に延びる陰極電極板、および、陰極電極板の先端で陽極電極へ向かって突出する陰極凸状部により、鉤型に構成し、陰極凸状部と陽極電極との間でアークを発生させるので、陰極電極板や陰極電極の損耗を抑制することができる。また、電極内部を中空として不活性ガスを通過させ、アーク発生部分の近くに不活性ガスの吹出口を設けているので、不活性ガスをアーク発生部分のすぐ近くに供給して当該付近の酸素を低減することができ、ひいては電極損耗の低減、電極の長寿命化を図ることができる。 As described above, according to the electrode in the ladle preheating apparatus according to the present invention, the cathode is a hanging cathode electrode, the cathode electrode plate extending horizontally from the tip of the cathode electrode, and the anode electrode at the tip of the cathode electrode plate The cathode convex portion projecting toward the bottom is formed into a bowl shape and an arc is generated between the cathode convex portion and the anode electrode, so that the wear of the cathode electrode plate and the cathode electrode can be suppressed. In addition, since the inside of the electrode is made hollow to pass inert gas and an inert gas outlet is provided in the vicinity of the arc generation part, the inert gas is supplied in the immediate vicinity of the arc generation part and oxygen in the vicinity is supplied. As a result, electrode wear can be reduced and the life of the electrode can be extended.
以下、本発明に係る取鍋予熱装置におけるカーボン電極について図を参照しながら説明する。 Hereinafter, the carbon electrode in the ladle preheating apparatus according to the present invention will be described with reference to the drawings.
図１は、取鍋予熱装置の電極部分を示す斜視図である。 FIG. 1 is a perspective view showing an electrode portion of a ladle preheating device.
取鍋予熱装置は、外皮が鉄鋼製で内壁が耐火物で構成されている取鍋の中心部に、双極のカーボン電極を装入して、双極間に高温のアークを発生、持続させて、その輻射熱を利用して取鍋の内壁の耐火物表面を予熱・保温する装置である。 The ladle preheating device inserts a bipolar carbon electrode in the center of the ladle whose outer skin is made of steel and the inner wall is made of refractory, and generates and sustains a high-temperature arc between the bipolar electrodes. It is a device that preheats and keeps the surface of the refractory on the inner wall of the ladle using the radiant heat.
そして、この取鍋内に装入される双極のカーボン電極が、図１に示す陽極電極１と陰極電極２である。 The bipolar carbon electrodes charged in the ladle are the anode electrode 1 and the cathode electrode 2 shown in FIG.
陽極電極１および陰極電極２は、共に並行して取鍋内に垂下されるカーボン製の電極棒である。ここで、陰極電極２は、先端に陰極電極板３を備え、さらに、陰極電極板３の陽極電極１と相対する位置に、陽極電極１に向けて突出した陰極凸状部４を備えている。すなわち、陽極電極１を昇降させて陰極凸状部４に近づけたり離したりしてアークを発生・消滅させることで、陽極電極１と陰極凸状部４との間をアーク発生部分とするものである。 The anode electrode 1 and the cathode electrode 2 are carbon electrode rods that are suspended in the ladle in parallel. Here, the cathode electrode 2 includes a cathode electrode plate 3 at the tip, and further includes a cathode convex portion 4 protruding toward the anode electrode 1 at a position facing the anode electrode 1 of the cathode electrode plate 3. . In other words, the arc is generated and extinguished by raising and lowering the anode electrode 1 and moving it closer to or away from the cathode convex portion 4, thereby forming an arc generating portion between the anode electrode 1 and the cathode convex portion 4. is there.
陰極電極板３および陰極凸状部４も同じくカーボン製である。陰極電極板３は、陰極電極２の先端に接続され、陰極電極２と直交して水平方向に陽極電極１の下方まで延びる板状部材である。この陰極電極板３は、ねじ切り孔を有しており、一般的に陽極電極１や陰極電極２に比べて製造にコストがかかり高価になっている。 The cathode electrode plate 3 and the cathode convex portion 4 are also made of carbon. The cathode electrode plate 3 is a plate-like member that is connected to the tip of the cathode electrode 2 and extends in a horizontal direction perpendicular to the cathode electrode 2 to below the anode electrode 1. The cathode electrode plate 3 has a threaded hole, and is generally more expensive and expensive than the anode electrode 1 and the cathode electrode 2.
陰極凸状部４は、陰極電極板３の先端、つまり、陽極電極１と相対する位置で、陽極電極１に向かって突出しており、陽極電極１に向かって狭まるテーパー状に形成されている。陰極凸状部４は、テーパー形状でなく円柱形状で突出させることにしてもよい。ただ、円柱形状としても、アークの発生により陰極凸状部４は損耗してテーパー形状に近づくことになる。そのため、陰極凸状部４の交換頻度の減少を図ることができるので、予めテーパー形状に形成しておくのが好ましいといえる。 The cathode convex portion 4 protrudes toward the anode electrode 1 at a tip of the cathode electrode plate 3, that is, a position facing the anode electrode 1, and is formed in a tapered shape that narrows toward the anode electrode 1. The cathode convex portion 4 may be projected in a cylindrical shape instead of a tapered shape. However, even if it is a cylindrical shape, the cathode convex part 4 is worn out by generation | occurrence | production of an arc, and will approximate a taper shape. For this reason, it is possible to reduce the replacement frequency of the cathode convex portion 4, and it can be said that it is preferable to form the cathode convex portion in advance in a tapered shape.
このように、本実施の形態に係る陰極は、陰極電極２、陰極電極板３および陰極凸状部４により、鉤型に、言い換えれば、ひらがなの「し」の形状又はアルファベットの「Ｊ」の形状（各図では左右反転となる）に構成されている。このような構成とすることで、陰極凸状部４と陽極電極１とに挟まれた空間がアーク発生部分となるので、比較的高価な陰極電極板３や陰極電極２の損耗を抑止することができる。 As described above, the cathode according to the present embodiment has a saddle shape, in other words, the shape of the “shi” of hiragana or the letter “J” of the alphabet, by the cathode electrode 2, the cathode electrode plate 3, and the cathode convex portion 4. It is configured in a shape (reversed horizontally in each figure). By adopting such a configuration, the space between the cathode convex portion 4 and the anode electrode 1 becomes an arc generation portion, so that wear of the relatively expensive cathode electrode plate 3 and cathode electrode 2 is suppressed. Can do.
以下では、図１の構成を基本として、電極部分の構成例について説明する。 Hereinafter, a configuration example of the electrode portion will be described based on the configuration of FIG.
図２は、電極部分の構成例を示す正面図である。 FIG. 2 is a front view showing a configuration example of the electrode portion.
ここでは、陰極電極２ａが、その内部を中空として、窒素ガス（Ｎ２）やアルゴン（Ａｒ）等の不活性ガスの通り道となる通気管５と、不活性ガスがアーク発生部分の近傍に向けて吹き出されるよう開口された吹出口６とを備えている構成例となっている。 Here, the cathode electrode 2a has a hollow inside, the vent pipe 5 serving as a passage for an inert gas such as nitrogen gas (N 2 ) or argon (Ar), and the inert gas directed toward the vicinity of the arc generation portion. It is the structural example provided with the blower outlet 6 opened so that it may blow off.
このように、不活性ガスをアーク発生部分付近へ供給することにより、アーク発生部分の電極付近の酸素を低減することができ、ひいては電極損耗の低減を図ることができる。 In this way, by supplying the inert gas to the vicinity of the arc generation portion, oxygen near the electrode in the arc generation portion can be reduced, and thus electrode wear can be reduced.
図３は、電極部分の別の構成例を示す正面図である。 FIG. 3 is a front view showing another configuration example of the electrode portion.
ここでは、陰極電極２ｂ、陰極電極板３ａおよび陰極凸状部４ａが、その内部を中空として通気管５ａを備え、陰極凸状部４ａが吹出口６ａを備えている構成例となっている。 Here, the cathode electrode 2b, the cathode electrode plate 3a, and the cathode convex portion 4a have a configuration in which the inside thereof is hollow and is provided with a vent pipe 5a, and the cathode convex portion 4a is provided with an outlet 6a.
この構成例では、吹出口がアーク発生部分の間近に位置することになり、より少ない不活性ガスでアーク発生部分近傍の酸素を低減することができるので、不活性ガスの供給量を抑えることができる。 In this configuration example, the outlet is located in the vicinity of the arc generation portion, and oxygen in the vicinity of the arc generation portion can be reduced with less inert gas, so that the supply amount of the inert gas can be suppressed. it can.
図４は、電極部分のさらに別の構成例を示す正面図である。 FIG. 4 is a front view showing still another configuration example of the electrode portion.
ここでは、図２および図３と異なり、陰極側ではなく、陽極電極１ａが、その内部を中空として通気管５ｂを備え、陽極電極１ａの下端に吹出口６ｂを備えている構成例となっている。 Here, unlike FIG. 2 and FIG. 3, not the cathode side, but the anode electrode 1a has a hollow inside and is provided with a vent pipe 5b, and is provided with an outlet 6b at the lower end of the anode electrode 1a. Yes.
この構成例によっても、吹出口をアーク発生部分の間近に配置して、不活性ガスの供給量を抑えることができる。 Also according to this configuration example, the supply amount of the inert gas can be suppressed by arranging the air outlet close to the arc generation portion.
以上、説明したように、本実施の形態に係る取鍋予熱装置におけるカーボン電極によれば、陰極を、垂下される陰極電極と、陰極電極の先端から水平方向に延びる陰極電極板と、陰極電極板の先端付近において陽極電極へ向かって突出する陰極凸状部とにより、鉤型に構成し、陰極凸状部と陽極電極との間でアークを発生させるので、高価な陰極電極板や陰極電極の損耗を抑制することができる。 As described above, according to the carbon electrode in the ladle preheating device according to the present embodiment, the cathode is suspended from the cathode electrode, the cathode electrode plate extending in the horizontal direction from the tip of the cathode electrode, and the cathode electrode The cathode convex portion projecting toward the anode electrode in the vicinity of the tip of the plate is formed into a bowl shape, and an arc is generated between the cathode convex portion and the anode electrode. Therefore, an expensive cathode electrode plate or cathode electrode is used. Can be prevented.
また、電極の内部を中空として、その内部に不活性ガスを通過させ、アーク発生部分の近くに不活性ガスの吹出口を設けているので、不活性ガスをアーク発生部分付近へ供給して酸素を低減することができ、ひいては電極損耗の低減を図り、電極の長寿命化を実現することができる。 Moreover, since the inside of the electrode is hollow, an inert gas is passed through the inside, and an inert gas outlet is provided near the arc generating portion, the inert gas is supplied to the vicinity of the arc generating portion to supply oxygen. As a result, electrode wear can be reduced and the life of the electrode can be extended.
なお、ここまで陰極を鉤型に構成する例を説明したが、切替スイッチ等の切替手段により陰極と陽極の極性を入れ替えて、陽極が鉤型となるように構成してもよい。 Although the example in which the cathode is configured in a bowl shape has been described so far, the polarity of the cathode and the anode may be switched by switching means such as a changeover switch so that the anode has a bowl shape.
電流は陽極から陰極に流れるため、主に酸化により消耗する陰極に比べて陽極側の方が消耗の程度が大きく、交換頻度も多くなる傾向にある。そのため、上記実施の形態の陰極を鉤型とする構成では、交換頻度が多い陽極側を交換し易く安価な従来の棒状の電極としている。 Since the current flows from the anode to the cathode, the anode side tends to be more consumed and the replacement frequency tends to be higher than the cathode that is consumed mainly by oxidation. Therefore, in the configuration in which the cathode of the above-described embodiment is a saddle type, the anode side, which is frequently exchanged, is easily replaced with a conventional bar-shaped electrode that is inexpensive.
ところが、アーク発生中の電子は陰極側から陽極側へ流れており、電子を下から上へ流すよりも上から下へ流す方が、発生させたアークを安定させるうえで好ましい。アークの安定化は、アーク長の延長を可能としアーク面積が増加することで、高温となる加熱部分が増え、加熱能力の向上を可能とする。 However, the electrons during the arc generation flow from the cathode side to the anode side, and it is preferable to flow the electrons from top to bottom rather than from the bottom to the top in order to stabilize the generated arc. The stabilization of the arc makes it possible to extend the arc length and increase the arc area, thereby increasing the number of heating portions that become high temperature and improving the heating capacity.
したがって、アークの安定化を図るうえで、陰極と陽極の極性入替は有効な方策となりうる。ただし、従来の電極構造で陰極電極板を陽極へ極性入替すれば、高価な陰極電極板を徒に損耗させてランニングコストを増大させてしまうことになる。この点、本発明の電極構造であれば、陰極凸状部が主に損耗し、高価な陰極電極板の損耗を抑制することができるので、ランニングコストの増加を招くことなく、加熱能力の向上を実現することができる。 Therefore, in order to stabilize the arc, the polarity exchange between the cathode and the anode can be an effective measure. However, if the polarity of the cathode electrode plate is switched to the anode in the conventional electrode structure, the expensive cathode electrode plate is worn out and the running cost is increased. In this regard, with the electrode structure of the present invention, the cathode convex portion is mainly worn out, and wear of an expensive cathode electrode plate can be suppressed, so that the heating capacity is improved without causing an increase in running cost. Can be realized.
以上、本発明に係る取鍋予熱装置におけるカーボン電極について、実施形態に基づいて説明したが本発明はこれに限定されるものではなく、本発明の目的を達成でき、かつ発明の要旨を逸脱しない範囲内で種々設計変更が可能であり、それらも全て本発明の範囲内に包含されるものである。 As mentioned above, although the carbon electrode in the ladle preheating apparatus which concerns on this invention was demonstrated based on embodiment, this invention is not limited to this, The objective of this invention can be achieved and it does not deviate from the summary of invention. Various design changes are possible within the scope, and they are all included in the scope of the present invention.
例えば、上記実施の形態では、電極の構成例を図を用いて説明したが、これらに限定されるものではなく、これらを組み合わせて、陰極電極と陽極電極の両方を中空化して不活性ガスを供給するとしてもよい。 For example, in the above-described embodiment, the configuration example of the electrode has been described with reference to the drawings. However, the present invention is not limited to these, and by combining them, both the cathode electrode and the anode electrode are hollowed to generate the inert gas. It may be supplied.
本発明は、鋳造工場で用いられる取鍋の予熱保温装置のカーボン電極として利用することができる。 INDUSTRIAL APPLICABILITY The present invention can be used as a carbon electrode for a ladle preheating heat retaining device used in a foundry.
１，１ａ，１１ 陽極電極
２，２ａ，２ｂ，１２ 陰極電極
３，３ａ，１３ 陰極電極板
４，４ａ 陰極凸状部
５，５ａ，５ｂ 通気管
６，６ａ，６ｂ 吹出口
1, 1a, 11 Anode electrode 2, 2a, 2b, 12 Cathode electrode 3, 3a, 13 Cathode electrode plate 4, 4a Cathode convex part 5, 5a, 5b Vent pipe 6, 6a, 6b Air outlet
Claims (3)
前記陰極電極棒の先端に接続され、水平方向に前記陽極電極棒の下方まで延びる板状部材の陰極電極板と、
前記陰極電極板の陽極電極棒と相対する位置に、陽極電極棒へ向かって突出する陰極凸状部と、
前記陰極電極棒または／および陽極電極棒の内部を中空として構成され、不活性ガスを通過させる通気管と、
前記陽極電極棒と前記陰極凸状部とに挟まれた空間へ向けて、前記通気管を通過する不活性ガスを供給する吹出口とを備える
ことを特徴とする取鍋予熱装置における電極。 A cathode electrode rod and an anode electrode rod suspended in parallel in the ladle;
A cathode electrode plate of a plate-like member connected to the tip of the cathode electrode rod and extending horizontally below the anode electrode rod;
A cathode convex portion protruding toward the anode electrode bar at a position facing the anode electrode bar of the cathode electrode plate,
A vent pipe configured such that the inside of the cathode electrode rod or / and the anode electrode rod is hollow, and allows an inert gas to pass through;
An electrode in a ladle preheating apparatus, comprising: a blower outlet that supplies an inert gas that passes through the vent pipe toward a space sandwiched between the anode electrode rod and the cathode convex portion.
ことを特徴とする請求項１記載の取鍋予熱装置における電極。 The electrode in the ladle preheating device according to claim 1, wherein the cathode convex portion has a tapered shape that narrows toward the anode electrode rod.
ことを特徴とする請求項１または２記載の取鍋予熱装置における電極。 The electrode in the ladle preheating device according to claim 1 or 2, further comprising polarity replacing means for switching the polarity of the cathode electrode rod, the cathode electrode plate, and the cathode convex portion and the anode electrode rod.
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