JPH03279779A - Furnace bottom electrode of dc arc furnace - Google Patents
Furnace bottom electrode of dc arc furnaceInfo
- Publication number
- JPH03279779A JPH03279779A JP7836290A JP7836290A JPH03279779A JP H03279779 A JPH03279779 A JP H03279779A JP 7836290 A JP7836290 A JP 7836290A JP 7836290 A JP7836290 A JP 7836290A JP H03279779 A JPH03279779 A JP H03279779A
- Authority
- JP
- Japan
- Prior art keywords
- water
- electrode rod
- cooling
- furnace
- electrode
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Granted
Links
- 239000000498 cooling water Substances 0.000 claims abstract description 26
- 239000007921 spray Substances 0.000 claims abstract description 19
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 abstract description 53
- 238000001816 cooling Methods 0.000 abstract description 41
- 239000002184 metal Substances 0.000 abstract description 6
- 229910052751 metal Inorganic materials 0.000 abstract description 6
- 238000000034 method Methods 0.000 abstract description 4
- 238000007599 discharging Methods 0.000 abstract 1
- RYGMFSIKBFXOCR-UHFFFAOYSA-N Copper Chemical compound [Cu] RYGMFSIKBFXOCR-UHFFFAOYSA-N 0.000 description 6
- XEEYBQQBJWHFJM-UHFFFAOYSA-N Iron Chemical compound [Fe] XEEYBQQBJWHFJM-UHFFFAOYSA-N 0.000 description 6
- 229910052802 copper Inorganic materials 0.000 description 6
- 239000010949 copper Substances 0.000 description 6
- 238000004880 explosion Methods 0.000 description 5
- 229910052742 iron Inorganic materials 0.000 description 3
- 238000010586 diagram Methods 0.000 description 2
- 239000012530 fluid Substances 0.000 description 2
- 238000002844 melting Methods 0.000 description 2
- 230000008018 melting Effects 0.000 description 2
- 238000010521 absorption reaction Methods 0.000 description 1
- 230000005611 electricity Effects 0.000 description 1
- 238000005516 engineering process Methods 0.000 description 1
- 238000010438 heat treatment Methods 0.000 description 1
- 239000012212 insulator Substances 0.000 description 1
- 239000000463 material Substances 0.000 description 1
- 239000000155 melt Substances 0.000 description 1
- 238000007670 refining Methods 0.000 description 1
- 238000009628 steelmaking Methods 0.000 description 1
- 230000008646 thermal stress Effects 0.000 description 1
- 238000009736 wetting Methods 0.000 description 1
Landscapes
- Discharge Heating (AREA)
- Vertical, Hearth, Or Arc Furnaces (AREA)
- Furnace Details (AREA)
Abstract
Description
【発明の詳細な説明】
〔産業上の利用分野〕
この発明は溶解および精錬に用いられる直流アーク炉の
炉底電極に関する。DETAILED DESCRIPTION OF THE INVENTION [Field of Industrial Application] This invention relates to a bottom electrode of a DC arc furnace used for melting and refining.
直流アーク炉の炉底電極は、たとえば製鋼炉の場合、１
６００〜１８００℃に達する溶融金属との接触、および
電極を流れる高密度電流によるジュール熱によって、厳
しい濡ｉ条件および熱応力にさらされる。このため炉底
電極の主構成部材である電極棒が消耗し過度に溶解して
溶融金属が漏出しないよう、炉底電極の冷却を確実にお
こなう必要がある。この炉底電極の水による冷却法とし
ては、たとえば特公昭６３−４３６７５号公報に開示さ
れているように、炉底部から下方へ突出した電極棒を、
間隙をもって銅スリーブで囲み、この銅スリーブの外周
部に設けたらせん状の溝内に冷却水を強制流通させて銅
スリーブを冷却する方法がある。For example, in the case of a steelmaking furnace, the bottom electrode of a DC arc furnace is 1
It is exposed to severe wetting conditions and thermal stress due to contact with molten metal reaching temperatures of 600-1800°C and Joule heating due to high density current flowing through the electrodes. For this reason, it is necessary to reliably cool the hearth electrode so that the electrode rod, which is the main component of the hearth electrode, does not wear out and melt excessively, causing molten metal to leak out. As a method of cooling the furnace bottom electrode with water, for example, as disclosed in Japanese Patent Publication No. 63-43675, an electrode rod protruding downward from the furnace bottom is used.
There is a method of cooling the copper sleeve by surrounding it with a copper sleeve with a gap and forcing cooling water into a spiral groove provided on the outer periphery of the copper sleeve.
ところがこの通水冷却法においては、冷却水は冷却面に
沿って流れるため冷却効果が劣り、所定の冷却効果を得
るためには上記の溝を小断面形状とし、かつたとえば６
〜１０に９／ｃｍ程度の高圧の冷却水を供給して、高速
水流による冷却をおこなう必要があった。このため極め
て多量の冷却水を必要とするうえ、炉の操業によりひん
ばんな熱サイクルの繰返しを受けて銅スリーブに疲労破
壊にＪ：るクラックが生じた場合、前記の高圧の冷却水
が炉内側に噴出して、水蒸気爆発などの大事故をおこす
おそれがあった。また、この通水冷却法では、通水量を
加減しても、冷却度合を制御することは難しかった。However, in this water cooling method, the cooling effect is poor because the cooling water flows along the cooling surface.In order to obtain the desired cooling effect, the above-mentioned grooves have to have a small cross-sectional shape and, for example, 6.
It was necessary to supply high-pressure cooling water of about 9/cm to 10 to 10 to perform cooling by high-speed water flow. For this reason, an extremely large amount of cooling water is required, and if cracks occur in the copper sleeve due to frequent thermal cycles during furnace operation, the high-pressure cooling water There was a risk that the water would gush out and cause a major accident such as a steam explosion. Further, in this water cooling method, it was difficult to control the degree of cooling even if the amount of water flowing was adjusted.
この発明は上記従来の問題点を解決するもので。 This invention solves the above-mentioned conventional problems.
電極棒が少量の冷却水により効率よく冷却され、また冷
却水の炉内側への噴出を抑制して水蒸気爆発事故を防止
できる直流アーク炉の炉底電極を提供しＪ：うとするも
のである。It is an object of the present invention to provide a bottom electrode for a DC arc furnace, in which the electrode rod is efficiently cooled by a small amount of cooling water, and the jetting of cooling water into the furnace can be suppressed to prevent steam explosion accidents.
しかしてこの発明の炉底電極は、炉底を構成する耐火物
に、頂面が炉内に露出し下部が炉外に突出した状態で、
電極棒を埋込み、この電極棒の下部側面を、該下部側面
に内側壁が間隙をもって対向する中空環体状の水冷ケー
スで包囲し、前記内側壁に対向する噴出口を有し冷却水
供給源に接続されたスプレーノズルを、前記水冷ケース
内に配設し、前記水冷ケースの下部に排水口を設け、こ
の排水口を排水手段に接続するとともに、前記電極棒の
下端部に通電端子を直接接続したことを特徴とする直流
アーク炉の炉底電極である。However, the furnace bottom electrode of the present invention has a top surface exposed inside the furnace and a lower portion protruding outside the furnace on the refractory constituting the furnace bottom.
An electrode rod is embedded, a lower side surface of the electrode rod is surrounded by a hollow ring-shaped water cooling case with an inner wall facing the lower side surface with a gap, and a cooling water supply source having a spout facing the inner wall. A spray nozzle connected to the electrode rod is disposed in the water-cooled case, a drain port is provided at the bottom of the water-cooled case, the drain port is connected to a drainage means, and a current-carrying terminal is directly connected to the lower end of the electrode rod. This is a bottom electrode of a DC arc furnace, which is characterized by being connected.
この発明における水冷ケースは、少なくともその内側壁
部が銅などの熱伝導性の優れた材料で構成されているこ
とが好ましい。In the water-cooled case according to the present invention, it is preferable that at least the inner wall portion of the water-cooled case is made of a material with excellent thermal conductivity such as copper.
この発明におけるスプレーノズルとしては、噴出口から
水のみが噴出する水スプレーノズルと、噴出口から水と
空気が噴出する気水スプレーノズルの、いずれを用いて
もよい。As the spray nozzle in this invention, either a water spray nozzle in which only water is ejected from the ejection port or an air/water spray nozzle in which water and air are ejected from the ejection port may be used.
またこの発明における排水手段としては、先端が排水溝
に開口した排水管のような自然排水方式の排水手段のぽ
かに、水または水蒸気を駆動流体とするベンチュリ機構
を利用したジエツ１〜ポンプ等の、各種のポンプにより
強制排水する方式の排水手段を用いることができる。In addition, the drainage means in the present invention may include a natural drainage method such as a drain pipe whose tip opens into a drainage groove, or a pump using a venturi mechanism using water or steam as a driving fluid. , drainage means of forced drainage using various pumps can be used.
この発明において水冷ケースによって包囲される部分の
電極棒の長さは、電極棒の直径の０．５乃至２倍の範囲
内の値とするのがよい。In the present invention, the length of the portion of the electrode rod surrounded by the water-cooled case is preferably within a range of 0.5 to 2 times the diameter of the electrode rod.
（作用）
この発明の炉底電極においては、電極棒の通電に伴う熱
膨張により、電極棒の下部側面は水冷ケースの内側壁表
面に接触する。この冷却ケースの内側壁は、内部にある
スプレーノズルからの水よたは気水スプレーにより冷却
されるので、電極棒の下部側面はこの内側壁を介して奪
熱冷却される。(Function) In the furnace bottom electrode of the present invention, the lower side surface of the electrode rod comes into contact with the inner wall surface of the water-cooled case due to thermal expansion caused by energization of the electrode rod. Since the inner wall of the cooling case is cooled by water or air water spray from the spray nozzle located inside, the lower side surface of the electrode rod is cooled by heat absorption through the inner wall.
そして上記の水または気水スプレー冷却においては、冷
却水の小滴が被冷却面に衝突して熱交換をおこなうため
、通水冷却に比べて、同一冷却水流量に対して、熱伝達
係数が２〜３倍と高い値を示すので、運転中の電極棒は
効率よく冷却され、昇温が抑制される。また、炉の運転
と運転の間の炉底電極の急速な冷却が望ましくない時は
、スプレ水母を低減したり、気体による水噴霧（気水ス
プレー）を採用することにより、冷却強度を制御できる
。また冷却後の冷却水は、水冷ケースの下部にある排水
口から排水手段により排水され、水冷ケース内に殆ど滞
留しない。このため、万一溶湯や電極棒溶融物が水冷ケ
ース内に侵入しても、通水冷却の場合のような水蒸気爆
発をおこすおそれがない。また万一水冷ケースに熱疲労
等によるクラックが発生しても、水冷つ゛−ス内の圧力
は大気圧であるため、通水冷却の場合のような高圧水の
炉内側への噴出による水蒸気爆発事故をおこすおそれが
なく、安全性が高い。In the above-mentioned water or air-water spray cooling, the small droplets of cooling water collide with the surface to be cooled and exchange heat, so the heat transfer coefficient is lower for the same cooling water flow rate than in water cooling. Since the value is as high as 2 to 3 times, the electrode rod during operation is efficiently cooled and temperature rise is suppressed. In addition, when rapid cooling of the bottom electrode between furnace operations is undesirable, the cooling intensity can be controlled by reducing the amount of sprayed water or by employing gaseous water spray (air-water spray). . Moreover, the cooling water after cooling is drained by a drainage means from the drain port in the lower part of the water-cooling case, and hardly remains in the water-cooling case. Therefore, even if molten metal or molten electrode rod should enter the water-cooled case, there is no risk of causing a steam explosion unlike in the case of water cooling. In addition, even if cracks occur in the water-cooled case due to thermal fatigue, etc., the pressure inside the water-cooled case is atmospheric pressure, so a steam explosion may occur due to high-pressure water jetting inside the reactor as in the case of water cooling. There is no risk of accidents and it is highly safe.
また炉操業時においては、電極棒は炉内側から第１図に
鎖線５０で示すように水冷ケースの上面から寸法りの位
置まで溶解して水冷ケースの冷却力とバランス状態を維
持するが、水冷ケースによって包囲される部分の電極棒
の長さＢ（’＝水冷ケースの高さ）はあまり小さくする
と１−寸法が過小となり溶解位置が水冷ケースに接近し
て危険であり、またあまり大ぎくしでも１−寸法は一定
値以上とはならず炉底スペースが過大となり好ましくな
い。第３図は発明者のテスト結果を整理した線図であり
、電極棒の直径をＤとするとき、電極棒の冷却部分長さ
Ｂは０．５Ｄ以上あれば充分であり、２Ｄ以上としても
Ｌの増加は少はであるので、０．５Ｄ≦８≦２Ｄとする
のが好ましい。During furnace operation, the electrode rod melts from the inside of the furnace to a certain distance from the top surface of the water-cooled case, as shown by the chain line 50 in Figure 1, to maintain the cooling power and balance of the water-cooled case. If the length B (' = height of the water-cooled case) of the electrode rod in the part surrounded by the case is too small, the dimensions will be too small and the melting position will be close to the water-cooled case, which is dangerous. However, the 1-dimension is not greater than a certain value and the space at the bottom of the furnace becomes excessive, which is not preferable. Figure 3 is a diagram arranging the inventor's test results. When the diameter of the electrode rod is D, it is sufficient that the length B of the cooling portion of the electrode rod is 0.5D or more, and even if it is 2D or more. Since the increase in L is small, it is preferable that 0.5D≦8≦2D.
以下第１図および第２図により、この発明の一実施例を
説明する。An embodiment of the present invention will be described below with reference to FIGS. 1 and 2.
図中、１は直流アーク炉の炉底で、２は耐火物、３は炉
体の鉄皮である。４は炉底電極で、鉄丸棒から成る電極
棒５の中間部乃至上部を耐火物２に埋込み、この電極棒
５の下部側面５ａを水冷ケース６により包囲するととも
に、電極棒５の下端部５ｂにポル１−８により通電端子
９を直接接続しである。電極棒５の頂面５Ｃは炉内に露
出している。In the figure, 1 is the bottom of the DC arc furnace, 2 is the refractory, and 3 is the iron skin of the furnace body. Reference numeral 4 denotes a furnace bottom electrode, in which the middle to upper part of an electrode rod 5 made of a round iron rod is embedded in the refractory 2, the lower side surface 5a of this electrode rod 5 is surrounded by a water-cooled case 6, and the lower end of the electrode rod 5 is The current-carrying terminal 9 is directly connected to the terminal 5b through the port 1-8. The top surface 5C of the electrode rod 5 is exposed in the furnace.
水冷ケース６は断面略口字状の中空環体状を呈し、内側
壁１０ａと下側壁１０ｂから成る銅製の内側環状体１０
と、外側壁１１ａと下側壁１１ｂとフランジ部１１Ｃか
ら成る耐熱鋼製の外側環状体１１とを、シールリング１
２．１３を介してボルト１４により一体に連結して成る
。フランジ部１１Ｃは絶縁物１５を介して鉄皮３により
支承されている。内側壁１０ａと電極棒５の下部側面５
ａの間には、電極棒５の所定温度（たとえば７００〜８
００℃）迄の熱膨張量に相当するすきまＳが設りである
。また１６は通電端子９と外側環状体１１を連結するボ
ルトである。２１は外側壁１１ａの内周に沿って設けた
給水路で、その壁面には、内側壁１０ａに対向する噴出
口を有するスプレーノズル２２と、内側壁１０ａ乃至上
側壁１０ｂに対向する噴出口を有するスプレーノズル２
３が設けである。２４は給水路２１に連通する給水口で
あり、また２５は水冷ケース６の下部に設けた排水口で
、水または水蒸気を駆動流体とするジェットポンプから
なる排水手段（図示しない）に接続されている。The water cooling case 6 has a hollow annular shape with a substantially cross-sectional shape, and an inner annular body 10 made of copper and consisting of an inner wall 10a and a lower wall 10b.
The seal ring 1
They are integrally connected by bolts 14 via 2.13. The flange portion 11C is supported by the iron skin 3 with an insulator 15 in between. Inner wall 10a and lower side surface 5 of electrode rod 5
a, a predetermined temperature of the electrode rod 5 (for example, 700 to 8
A gap S corresponding to the amount of thermal expansion up to 00°C is provided. Further, 16 is a bolt that connects the current-carrying terminal 9 and the outer annular body 11. Reference numeral 21 denotes a water supply channel provided along the inner periphery of the outer wall 11a, and the wall surface has a spray nozzle 22 having a spout facing the inner wall 10a, and a spray nozzle 22 having a spout facing the inner wall 10a to the upper wall 10b. spray nozzle with 2
3 is a provision. 24 is a water supply port communicating with the water supply channel 21, and 25 is a drain port provided at the bottom of the water cooling case 6, which is connected to a drain means (not shown) consisting of a jet pump using water or steam as a driving fluid. There is.
一方通電端子９の電極棒５への取付部の下面には、通水
冷却式の水冷ボックス２６がボルト８により取付りられ
、その給水口２７は冷却水供給源に接続され、その排水
口２８は接続管２９を介して給水路２１の給水ｒｌ］２
４に接続されている。On the other hand, a water-cooling type water-cooling box 26 is attached to the lower surface of the attachment part of the energizing terminal 9 to the electrode rod 5 with bolts 8, and its water supply port 27 is connected to a cooling water supply source, and its drain port 28 is connected to a cooling water supply source. is the water supply rl of the water supply channel 21 via the connecting pipe 29]2
Connected to 4.
上記構成の炉底電極４においては、アーク電流によるジ
ュール熱および溶湯どの接触によって電極棒５がたとえ
ば７００〜８００℃程度迄昇温すると、電極棒５の熱膨
張により電極棒５の下部側面５ａは水冷ケース６の内側
壁１０ａの内周面に接触し、それ以上の温度では内側壁
１０ａは電極棒５とほぼ一体となって膨張収縮する。冷
却水供給源から水冷ボックス２６を介して給水路２１に
供給された冷却水は、スプレーノズル２２および２３か
ら噴出して内側壁１０ａおよび下側壁１０ｂを冷却する
ので、電極棒５の下部側面５ａは内側壁１０ａを介して
効率よく奪熱冷却される。また水冷ボックス２６内を流
通する冷却水により、通電端子９および電極棒５の下端
面が冷却される。In the furnace bottom electrode 4 having the above configuration, when the temperature of the electrode rod 5 rises to, for example, about 700 to 800°C due to Joule heat caused by the arc current and contact with the molten metal, the lower side surface 5a of the electrode rod 5 due to thermal expansion of the electrode rod 5. It comes into contact with the inner circumferential surface of the inner wall 10a of the water-cooled case 6, and at a temperature higher than that, the inner wall 10a expands and contracts almost integrally with the electrode rod 5. The cooling water supplied from the cooling water supply source to the water supply channel 21 via the water cooling box 26 is ejected from the spray nozzles 22 and 23 to cool the inner wall 10a and the lower wall 10b, so that the lower side surface 5a of the electrode rod 5 is efficiently cooled by heat removal through the inner wall 10a. Further, the lower end surfaces of the current-carrying terminal 9 and the electrode rod 5 are cooled by the cooling water flowing in the water-cooling box 26 .
水冷ケース６内で各スプレーノズルから噴出したスプレ
ー冷却後の冷却水は、水冷ケース６内から排水口２５を
経て排水手段により排水されるので、水冷ケース６内に
は水は殆ど滞留することがない。The spray-cooled cooling water spouted from each spray nozzle in the water-cooled case 6 is drained from the water-cooled case 6 through the drain port 25 by the drainage means, so that almost no water remains in the water-cooled case 6. do not have.
この発明は上記実施例に限定されるものではなく、たど
えば上記実施例では給水路２１は水冷ボックス２６を介
して冷却水供給源に接続したが、直接冷却水供給源に接
続してもよい。また電極棒５の下端面は比較的温度が低
いので、水冷ボックス２６は省略してもよい。The present invention is not limited to the above embodiment, and in the above embodiment, the water supply channel 21 is connected to the cooling water supply source via the water cooling box 26, but it may also be directly connected to the cooling water supply source. good. Furthermore, since the temperature of the lower end surface of the electrode rod 5 is relatively low, the water cooling box 26 may be omitted.
（発明の効果）
以上説明したようにこの発明によれば、水冷ケースの内
側壁を介して電極棒の下部側面をスプレー冷却するよう
にしたので、通水冷却に比べて生母の水で効率よく電極
棒を冷却できる。また水冷ケース内には冷却水はほとん
ど滞留せず、水冷ケース内は大気圧であるため、万一溶
湯や電極溶融物が水冷ケース内に侵入したり水冷ケース
にクラックが発生した場合でも、水蒸気爆発＄故をおこ
すおそれがなく、安全性が高い。(Effects of the Invention) As explained above, according to the present invention, the lower side surface of the electrode rod is spray-cooled through the inner wall of the water-cooling case, so that cooling is performed more efficiently using raw water than in the case of water cooling. The electrode rod can be cooled. In addition, almost no cooling water stays inside the water-cooled case, and the inside of the water-cooled case is at atmospheric pressure, so even if molten metal or electrode melt enters the water-cooled case or cracks occur in the water-cooled case, water vapor will not accumulate. Highly safe as there is no risk of explosion.
第１図はこの発明の一実施例を示す炉底電極の縦断面図
、第２図は第１図のＡ−Ａ線断面図、第３図は第１図の
電極棒の冷却部分の長さと電極棒非溶解長さとの関係を
示す線図である。
０
１・・・炉底、２・・・耐火物、４・・・炉底電極、５
・・・電極棒、５ａ・・・下部側面、６・・・水冷ケー
ス、９・・・通電端子、１０ａ・・・内側壁、２１・・
・給水路、２２・・・スプレーノズル、２４・・・給水
口、２５・・・排水口。FIG. 1 is a longitudinal sectional view of a hearth electrode showing an embodiment of the present invention, FIG. 2 is a sectional view taken along line A-A in FIG. 1, and FIG. 3 is a length of the cooling portion of the electrode rod in FIG. FIG. 3 is a diagram showing the relationship between the length of the electrode rod and the undissolved length of the electrode rod. 0 1... Hearth bottom, 2... Refractory, 4... Hearth bottom electrode, 5
...Electrode rod, 5a...Lower side surface, 6...Water cooling case, 9...Electricity terminal, 10a...Inner wall, 21...
- Water supply channel, 22... Spray nozzle, 24... Water supply port, 25... Drain port.
Claims (1)
が炉外に突出した状態で、電極棒を埋込み、この電極棒
の下部側面を、該下部側面に内側壁が間隙をもつて対向
する中空環体状の水冷ケースで包囲し、前記内側壁に対
向する噴出口を有し冷却水供給源に接続されたスプレー
ノズルを、前記水冷ケース内に配設し、前記水冷ケース
の下部に排水口を設け、この排水口を排水手段に接続す
るとともに、前記電極棒の下端部に通電端子を直接接続
したことを特徴とする直流アーク炉の炉底電極。 ２、水冷ケースによつて包囲される部分の電極棒の長さ
が、電極棒の直径の０．５乃至２倍の範囲内にある請求
項１記載の直流アーク炉の炉底電極。[Claims] 1. An electrode rod is embedded in the refractory constituting the furnace bottom with the top surface exposed inside the furnace and the lower part protruding outside the furnace, and the lower side of the electrode rod is A spray nozzle, which is surrounded by a hollow annular water-cooled case with inner walls facing each other with a gap on the side faces and which has a spout facing the inner wall and is connected to a cooling water supply source, is placed inside the water-cooled case. A bottom of a DC arc furnace, characterized in that a drain port is provided at the bottom of the water-cooled case, the drain port is connected to a drainage means, and a current-carrying terminal is directly connected to the lower end of the electrode rod. electrode. 2. The bottom electrode for a DC arc furnace according to claim 1, wherein the length of the electrode rod in the portion surrounded by the water-cooled case is within a range of 0.5 to 2 times the diameter of the electrode rod.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP7836290A JP2946619B2 (en) | 1990-03-27 | 1990-03-27 | Bottom electrode of DC arc furnace |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP7836290A JP2946619B2 (en) | 1990-03-27 | 1990-03-27 | Bottom electrode of DC arc furnace |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| JPH03279779A true JPH03279779A (en) | 1991-12-10 |
| JP2946619B2 JP2946619B2 (en) | 1999-09-06 |
Family
ID=13659890
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP7836290A Expired - Fee Related JP2946619B2 (en) | 1990-03-27 | 1990-03-27 | Bottom electrode of DC arc furnace |
Country Status (1)
| Country | Link |
|---|---|
| JP (1) | JP2946619B2 (en) |
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| WO1997029617A1 (en) * | 1996-02-08 | 1997-08-14 | Koester Volkwin | Electrode and cooling element for a metallurgical vessel |
| CN102656415A (en) * | 2009-12-15 | 2012-09-05 | 丹尼尔和科菲森梅克尼齐有限公司 | Electrode for direct current continuous arc furnace |
| CN112902674A (en) * | 2021-01-26 | 2021-06-04 | 中冶赛迪工程技术股份有限公司 | Air-cooled contact pin type bottom electrode |
-
1990
- 1990-03-27 JP JP7836290A patent/JP2946619B2/en not_active Expired - Fee Related
Cited By (8)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| WO1997029617A1 (en) * | 1996-02-08 | 1997-08-14 | Koester Volkwin | Electrode and cooling element for a metallurgical vessel |
| US6031861A (en) * | 1996-02-08 | 2000-02-29 | Koester; Volkwin | Electrode and cooling element for a metallurgical vessel |
| CN102656415A (en) * | 2009-12-15 | 2012-09-05 | 丹尼尔和科菲森梅克尼齐有限公司 | Electrode for direct current continuous arc furnace |
| JP2013513924A (en) * | 2009-12-15 | 2013-04-22 | ダニエリ アンド シー．オフィチネ メッカニチェ ソシエタ ペル アチオニ | Electrodes for DC continuous arc furnaces. |
| CN102656415B (en) * | 2009-12-15 | 2015-04-15 | 丹尼尔和科菲森梅克尼齐有限公司 | Electrode for direct current continuous arc furnace |
| US9335097B2 (en) | 2009-12-15 | 2016-05-10 | Danieli & C. Officine Meccaniche S.P.A. | Electrode for direct current continuous arc furnace |
| CN112902674A (en) * | 2021-01-26 | 2021-06-04 | 中冶赛迪工程技术股份有限公司 | Air-cooled contact pin type bottom electrode |
| CN112902674B (en) * | 2021-01-26 | 2024-04-30 | 中冶赛迪工程技术股份有限公司 | Air-cooled contact pin type bottom electrode |
Also Published As
| Publication number | Publication date |
|---|---|
| JP2946619B2 (en) | 1999-09-06 |
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