JPS6227839Y2 - - Google Patents
Info
- Publication number
- JPS6227839Y2 JPS6227839Y2 JP1982076961U JP7696182U JPS6227839Y2 JP S6227839 Y2 JPS6227839 Y2 JP S6227839Y2 JP 1982076961 U JP1982076961 U JP 1982076961U JP 7696182 U JP7696182 U JP 7696182U JP S6227839 Y2 JPS6227839 Y2 JP S6227839Y2
- Authority
- JP
- Japan
- Prior art keywords
- water
- furnace
- cooled box
- splash
- box
- 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.)
- Expired
Links
- 229910000831 Steel Inorganic materials 0.000 claims description 17
- 239000010959 steel Substances 0.000 claims description 17
- 239000012768 molten material Substances 0.000 claims description 2
- 238000002844 melting Methods 0.000 description 8
- 230000008018 melting Effects 0.000 description 8
- 238000007670 refining Methods 0.000 description 8
- 238000001816 cooling Methods 0.000 description 6
- 238000004519 manufacturing process Methods 0.000 description 5
- 239000002184 metal Substances 0.000 description 5
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 description 5
- 238000003466 welding Methods 0.000 description 3
- 230000008602 contraction Effects 0.000 description 2
- 230000000694 effects Effects 0.000 description 2
- 238000010438 heat treatment Methods 0.000 description 2
- 239000011819 refractory material Substances 0.000 description 2
- QVGXLLKOCUKJST-UHFFFAOYSA-N atomic oxygen Chemical compound [O] QVGXLLKOCUKJST-UHFFFAOYSA-N 0.000 description 1
- 238000000034 method Methods 0.000 description 1
- 229910052760 oxygen Inorganic materials 0.000 description 1
- 239000001301 oxygen Substances 0.000 description 1
- 230000008439 repair process Effects 0.000 description 1
- 239000002344 surface layer Substances 0.000 description 1
- 239000000725 suspension Substances 0.000 description 1
Landscapes
- Vertical, Hearth, Or Arc Furnaces (AREA)
- Furnace Housings, Linings, Walls, And Ceilings (AREA)
Description
本考案は表面へのスプラツシユ付着を容易にし
た電気炉の炉内水冷ボツクスに関する。
金属溶解精錬用電気炉の炉壁部の一部または全
部に耐火物の代替として水冷ボツクスが使用され
る。
すなわち第１図に示すように金属溶解精錬用電
気炉１には炉壁部２および炉床部３があり、炉壁
部２の一部または全部に水冷ボツクス４が配置さ
れる。炉床部３内で溶解精錬される溶融体５の表
層部より溶解精錬中にスプラツシユ６が飛散し炉
壁部２の内面に飛散するがその一部は水冷ボツク
ス４の内面に付着する。
従来より使用されている水冷ボツクスは、第２
および第３図に示すように、水冷ボツクス４の炉
内壁面１２上に短尺円筒状突起１３を略一定の間
隔を置いてスポツト状に溶接たものが使用されて
いた。この場合、円筒状突起１３の軸方向は炉内
壁面２に対し垂直方向である。
炉内における溶解精錬過程で発生し飛散するス
プラツシユ６はまず溶接部１４に付着し、さらに
突起１３および壁面１２を覆つて付着凝固し、水
冷ボツクス１の内表面１２全般を保護する。すな
わち突起１３を配置することにより炉内壁面にス
プラツシユ６の付着凝固を容易にして、内壁面１
２を保護している。
しかし、この構造では、スプラツシユ６の付着
を容易にするものの、スクラツプの炉内への装入
時の震動や冷却加熱のくり返しによるスプラツシ
ユの膨張、収縮により付着したスプラツシユ６が
剥落し易い欠点がある。従つて炉内壁面１２がス
プラツシユ６により保護されずに露出され易く、
溶解時のスクラツプとのスパーク、溶解精錬時に
使用される酸素による損傷などの問題が発生しが
ちであり、さらに、修理による操業中止、熱的な
ロス、水冷ボツクスの寿命低下などの問題があ
る。また、この従来の構造においては、内表面１
２への突起１３取り付へのための溶接作業に時間
を要し、従つて水冷ボツクス製造のコストも高い
という欠点を有している。
従来技術の他の例として、例えば実公昭55−
7827号明細書に開示されるように、水冷ボツクス
の炉内側の露出面に適宜形状のフインを複数個突
設したアーク炉内水冷ボツクスも提示されてい
る。しかし、この場合も明細書の実施例に示され
るように複数のフインは水平方向、上下方向にお
いて互に間隔を置いて突設されている。従つて上
述した前者の従来技術と同様にフインが水平方向
に間隔を置いて突設されているため付着したスプ
ラツシユの耐剥離性は必ずしも十分ではなくまた
フインの製作、取付けに多大の工数を必要すると
いう欠点がある。さらにフインはその形状からス
パーク、スプラツシユにより損傷され易い。
本考案の目的は、上記従来の欠点を克服し、水
冷ボツクスの炉内壁面に複数の円形断面を有する
棒鋼を水平に所定の間隔を置いて固定することに
より、スプラツシユが炉内壁面より剥落し難く、
従つて長寿命で、かつ水冷による熱損失が少なく
しかも製造コストの低い電気炉炉内水冷ボツクス
を提供するにある。
つぎに、本考案について、実施例により図面を
参照しつつ説明する。
本考案の水冷ボツクス４は、第１図により上記
において説明したように、金属精錬用電気炉１の
炉壁部２の一部または全部に耐火物の代替として
使用されている。
第４図は本考案の水冷ボツクスの実施例の部材
斜視、第５図はその断面図で、両図において水冷
ボツクス４の炉内表面２２には、水平方向に円形
断面を有する複数の棒鋼２３が上下に所定の間隔
を置いて溶接により固着される。この場合棒鋼２
３は一般に切れ目のない一体物が使用されるが、
場合によつては複数の棒鋼を水平方向に隙間なく
並べて使用してもよい。棒鋼２３は直径15〜25mm
の丸棒が使用され、各棒鋼２３間の距離ｄ（各棒
鋼の軸心間の間隔）は100〜200mmが望ましい。棒
鋼２３の直径が25mmより大きい場合は付着したス
プラツシユ６が剥落し易く、また15mmより小さい
場合は、平坦な面と同様な条件に近くなり、スプ
ラツシユ６が付着し難くかつ剥落し易くなる。ま
た、棒鋼２３の間隔ｄが200mmをこえあるいは100
mm未満の場合は、同様にスプラツシユ６が付着し
難くなりまた剥落し易くなる。溶接部２４は棒鋼
２３の全長にわたる必要はなく、略等間隔に局部
的に棒鋼２３の上下面を溶接固定する。
この構造のものにおいては、棒鋼２３を長尺の
まま、局部的な溶接により水冷ボツクスの内面２
２に固定するので、第２，３図により説明した従
来の突起１３を固定するものと比較して、その製
作は簡単で従つて低コストとなる。
棒鋼２３は水平方向において切れ目がないので
スプラツシユ６は棒鋼２３上に確実に留まつて付
着し、炉の震動や冷却加熱のくり返しによるスプ
ラツシユの膨張、収縮による付着スプラツシユ６
の耐剥離性は大きく、実際の剥落はほとんどな
い。また棒鋼２３はその形状によりスパーク、ス
プラツシユによる損傷も極めて小さい。
つぎに本考案を120T電気炉に実施した時の効
果を従来のものと比較において第１表に示す。
The present invention relates to an in-furnace water-cooled box for an electric furnace that facilitates the adhesion of splash to the surface. A water-cooled box is used as an alternative to refractories for part or all of the furnace wall of an electric furnace for metal melting and refining. That is, as shown in FIG. 1, an electric furnace 1 for metal melting and refining has a furnace wall section 2 and a hearth section 3, and a water-cooled box 4 is disposed on a part or all of the furnace wall section 2. Splash 6 is scattered from the surface layer of the molten material 5 melted and refined in the hearth 3 during melting and refining and is scattered on the inner surface of the furnace wall 2, but a part of it adheres to the inner surface of the water-cooled box 4. The conventionally used water-cooled box is
As shown in FIG. 3, short cylindrical protrusions 13 were welded in spots on the inner wall surface 12 of the water-cooled box 4 at approximately constant intervals. In this case, the axial direction of the cylindrical protrusion 13 is perpendicular to the furnace inner wall surface 2. Splash 6 generated and scattered during the melting and refining process in the furnace first adheres to the welded portion 14 and further covers the protrusion 13 and wall surface 12 to adhere and solidify, thereby protecting the entire inner surface 12 of the water-cooled box 1. That is, by arranging the protrusions 13, the splash 6 can be easily adhered to and solidified on the inner wall surface of the furnace, and the inner wall surface 1
2 is protected. However, although this structure makes it easier for the splash 6 to adhere, it has the disadvantage that the adhered splash 6 tends to peel off due to the expansion and contraction of the splash due to vibrations when the scrap is charged into the furnace and repeated cooling and heating. . Therefore, the furnace inner wall surface 12 is not protected by the splash 6 and is likely to be exposed.
Problems such as sparks from scrap during melting and damage from oxygen used during melting and refining tend to occur, and further problems include suspension of operations due to repairs, thermal losses, and shortened lifespan of water-cooled boxes. In addition, in this conventional structure, the inner surface 1
The disadvantage is that the welding work for attaching the protrusions 13 to 2 requires time, and the manufacturing cost of the water-cooled box is also high. As another example of the prior art, for example,
As disclosed in the specification of No. 7827, a water-cooled box in an arc furnace is also proposed in which a plurality of appropriately shaped fins are protruded from the exposed surface of the water-cooled box inside the furnace. However, in this case as well, as shown in the embodiments of the specification, the plurality of fins are provided so as to project at intervals in the horizontal and vertical directions. Therefore, as in the former prior art described above, since the fins are protruded at intervals in the horizontal direction, the peeling resistance of the attached splash is not necessarily sufficient, and a large number of man-hours are required to manufacture and install the fins. There is a drawback that it does. Furthermore, the fins are easily damaged by sparks and splashes due to their shape. The purpose of the present invention is to overcome the above-mentioned conventional drawbacks and to prevent splashes from falling off from the inner wall of a water-cooled box by fixing steel bars having a plurality of circular cross sections horizontally at predetermined intervals on the inner wall of a water-cooled box. difficult,
Therefore, it is an object of the present invention to provide a water-cooled box in an electric furnace that has a long life, has little heat loss due to water cooling, and is inexpensive to manufacture. Next, the present invention will be described by way of examples with reference to the drawings. As explained above with reference to FIG. 1, the water-cooled box 4 of the present invention is used as a substitute for refractories in part or all of the furnace wall 2 of the electric furnace 1 for metal refining. Fig. 4 is a perspective view of a member of an embodiment of the water-cooled box of the present invention, and Fig. 5 is a sectional view thereof. are fixed by welding at predetermined intervals above and below. In this case steel bar 2
For 3, an unbroken piece is generally used, but
In some cases, a plurality of steel bars may be used horizontally side by side without gaps. Steel bar 23 has a diameter of 15 to 25 mm.
A round bar is used, and the distance d between each steel bar 23 (the distance between the axes of each steel bar) is preferably 100 to 200 mm. If the diameter of the steel bar 23 is larger than 25 mm, the attached splash 6 will easily fall off, and if it is smaller than 15 mm, the conditions will be similar to those on a flat surface, and the splash 6 will be difficult to stick to and easy to fall off. In addition, if the interval d between the steel bars 23 exceeds 200 mm or 100 mm,
If it is less than mm, the splash 6 will similarly be difficult to adhere to and will easily peel off. The welding portions 24 do not need to span the entire length of the steel bar 23, and the upper and lower surfaces of the steel bar 23 are locally welded and fixed at approximately equal intervals. In this structure, the inner surface 2 of the water cooling box is locally welded while the steel bar 23 remains long.
Since the protrusion 13 is fixed to the protrusion 2, the production thereof is simpler and the cost is lower than that of the conventional protrusion 13 explained with reference to FIGS. 2 and 3. Since the steel bar 23 has no cuts in the horizontal direction, the splash 6 reliably stays and adheres to the steel bar 23, and the adhesion splash 6 is prevented by expansion and contraction of the splash due to vibrations of the furnace and repeated cooling and heating.
The peeling resistance is high, and there is almost no actual peeling. Furthermore, due to its shape, the steel bar 23 suffers extremely little damage from sparks and splashes. Next, Table 1 shows the effects of implementing the present invention in a 120T electric furnace in comparison with the conventional one.
【表】
第１表に示すごとく、本考案のものは、水冷ボ
ツクス内表面に付着するスプラツシユの保護によ
り損傷が軽減され、従つて水洩れ等の事故防止、
寿命延長、エネルギ節減など顕著な効果が得られ
るとともに、その製作コストも低減された。[Table] As shown in Table 1, the product of the present invention reduces damage by protecting the splash that adheres to the inner surface of the water cooling box, and therefore prevents accidents such as water leakage.
Not only have significant effects such as life extension and energy savings been achieved, but manufacturing costs have also been reduced.
第１図は水冷ボツクスを備えた金属溶解精錬用
電気炉の縦断面図、第２図は従来の水冷ボツクス
の斜視図、第３図は第２図の−断面図、第４
図は本考案の実施例の斜視図、第５図は第４図の
−断面図である。
１……金属溶解精錬用電気炉、２……炉壁部、
４……水冷ボツクス、６……スプラツシユ、２２
……内壁面、２３……棒鋼、２４……溶接部。
Fig. 1 is a longitudinal cross-sectional view of an electric furnace for metal melting and refining equipped with a water-cooled box, Fig. 2 is a perspective view of a conventional water-cooled box, Fig. 3 is a - sectional view of Fig. 2, and Fig.
The figure is a perspective view of an embodiment of the present invention, and FIG. 5 is a cross-sectional view taken from FIG. 1... Electric furnace for metal melting and refining, 2... Furnace wall,
4...Water cooling box, 6...Splash, 22
...inner wall surface, 23 ... steel bar, 24 ... welded part.
Claims (1)
クスの炉内表面上に該炉内表面全巾に亘つて直径
が15ないし25mmの円形断面を有する棒鋼を各々の
軸心間で100ないし200mmの上下間隔で複数段水平
に配置し、各段の該棒鋼は水平方向の連続した一
体の棒状または複数の棒が隙間なく一体形状とし
て固定され、炉内溶融体よりのスプラツシユを付
着させ、該スプラツシユが該水冷ボツクス表面よ
り剥落し難い構造としたことを特徴とする電気炉
炉内水冷ボツクス。 In a water-cooled box in an electric furnace, a steel bar having a circular cross section with a diameter of 15 to 25 mm is placed on the inner surface of the water-cooled box over the entire width of the inner surface of the furnace, with vertical intervals of 100 to 200 mm between each axis. The steel bars in each stage are fixed horizontally in the form of a continuous one-piece rod or a plurality of rods are fixed in an integral shape without gaps, and the splash from the molten material in the furnace is deposited. A water-cooled box in an electric furnace characterized by having a structure that prevents the box from peeling off from the surface of the water-cooled box.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP7696182U JPS58179497U (en) | 1982-05-27 | 1982-05-27 | Electric furnace water cooling box |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP7696182U JPS58179497U (en) | 1982-05-27 | 1982-05-27 | Electric furnace water cooling box |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| JPS58179497U JPS58179497U (en) | 1983-12-01 |
| JPS6227839Y2 true JPS6227839Y2 (en) | 1987-07-16 |
Family
ID=30086241
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP7696182U Granted JPS58179497U (en) | 1982-05-27 | 1982-05-27 | Electric furnace water cooling box |
Country Status (1)
| Country | Link |
|---|---|
| JP (1) | JPS58179497U (en) |
Citations (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPS557827U (en) * | 1978-06-23 | 1980-01-18 |
-
1982
- 1982-05-27 JP JP7696182U patent/JPS58179497U/en active Granted
Patent Citations (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPS557827U (en) * | 1978-06-23 | 1980-01-18 |
Also Published As
| Publication number | Publication date |
|---|---|
| JPS58179497U (en) | 1983-12-01 |
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