JPS6237685B2 - - Google Patents
Info
- Publication number
- JPS6237685B2 JPS6237685B2 JP56074473A JP7447381A JPS6237685B2 JP S6237685 B2 JPS6237685 B2 JP S6237685B2 JP 56074473 A JP56074473 A JP 56074473A JP 7447381 A JP7447381 A JP 7447381A JP S6237685 B2 JPS6237685 B2 JP S6237685B2
- Authority
- JP
- Japan
- Prior art keywords
- tuyere
- double
- electric furnace
- pipe
- brick
- 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
- 238000007664 blowing Methods 0.000 claims description 8
- 239000011810 insulating material Substances 0.000 claims description 3
- 239000011449 brick Substances 0.000 description 13
- 239000007789 gas Substances 0.000 description 8
- XEEYBQQBJWHFJM-UHFFFAOYSA-N Iron Chemical compound [Fe] XEEYBQQBJWHFJM-UHFFFAOYSA-N 0.000 description 4
- 239000000112 cooling gas Substances 0.000 description 3
- 239000012212 insulator Substances 0.000 description 3
- 230000003628 erosive effect Effects 0.000 description 2
- 229910052742 iron Inorganic materials 0.000 description 2
- 238000000034 method Methods 0.000 description 2
- 229910000831 Steel Inorganic materials 0.000 description 1
- 238000001816 cooling Methods 0.000 description 1
- 238000005261 decarburization Methods 0.000 description 1
- 238000004090 dissolution Methods 0.000 description 1
- 230000000694 effects Effects 0.000 description 1
- 238000004880 explosion Methods 0.000 description 1
- 238000012423 maintenance Methods 0.000 description 1
- 238000004519 manufacturing process Methods 0.000 description 1
- 239000010445 mica Substances 0.000 description 1
- 229910052618 mica group Inorganic materials 0.000 description 1
- 239000010959 steel Substances 0.000 description 1
Classifications
-
- 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
Description
【発明の詳細な説明】
この発明は、絶縁物をコーテイングした二重管
羽口及びアース付二重管羽口を採用した底吹き電
気炉に関するものである。DETAILED DESCRIPTION OF THE INVENTION The present invention relates to a bottom-blown electric furnace that employs a double-pipe tuyere coated with an insulating material and a double-pipe tuyere with a ground.
従来、電気炉における鋼の製造は、まず電気炉
にスクラツプを装填して電極に通電し溶解するも
ので、溶解を促進させ、脱炭、昇温等にO2ガス
を炉前作業口等によりランスパイプにて吹込んで
おり、第１図ないし第２図に示す如く、炉壁レン
ガ１、炉床スタンプ２又は炉床レンガ３、鉄皮４
からなる電気炉ではアース５を電気炉鉄皮４又は
内張り耐火物の炉体スタンプ２又は炉体レンガ３
から取つている。 Conventionally, in the production of steel in an electric furnace, scrap is first loaded into the electric furnace and energized through the electrodes to melt it. It is blown in with a lance pipe, and as shown in Figs.
In an electric furnace, the earth 5 is connected to the electric furnace shell 4 or the furnace body stamp 2 of the refractory lining or the furnace body brick 3.
It is taken from
発明者らは先にガス底吹法が電気炉においても
より多目的に活用できることに着目し底吹き電気
炉を開発したが（特願昭55―136320号）、この電
気炉ガス底吹法では、通電中における羽口レンガ
と、二重管羽口との間のスパークによる羽口の溶
損、ガス洩れが発生して、操業維持、安全性の点
で好ましくない状況が生じるという難点があつ
た。 The inventors had previously developed a bottom-blowing electric furnace, noting that the gas bottom-blowing method could be used for more purposes in electric furnaces (Japanese Patent Application No. 136320-1981). There was a problem in that sparks between the tuyere brick and the double pipe tuyere during energization caused tuyere erosion and gas leakage, creating an unfavorable situation in terms of operational maintenance and safety. .
すなわち、従来の電気炉ガス底吹法では羽口レ
ンガが苛酷な条件にさらされるため、現在は
MgO―Ｃ系のレンガが用いられることが多い
が、このレンガは特に電気伝導性が良く二重管羽
口外管との間に若干の空隙があるとスパークする
危険が多い。このスパークにより外管が溶損して
孔があき、羽口冷却効果がなくなり、羽口の損傷
が急激に進む。しかも外管の冷却ガスとして
CmHn系を使用する場合は爆発の危険があつた。 In other words, in the conventional electric furnace gas bottom blowing method, the tuyere bricks are exposed to harsh conditions;
MgO--C type bricks are often used, but this brick has particularly good electrical conductivity and there is a high risk of sparking if there is a slight gap between the double tube and the outer tube of the tuyere. This spark causes the outer tube to melt and create holes, which eliminates the tuyere cooling effect and causes rapid damage to the tuyere. Moreover, as a cooling gas for the outer tube.
There was a risk of explosion when using CmHn.
この発明は、上述した従来例の対策としてなさ
れたものであり、電気炉ガス底吹において、二重
管羽口と羽口レンガ間のスパークを防止するため
絶縁物をコーデングした二重管羽口及び二重管羽
口へのアース取付けを行なつた底吹き電気炉を提
供するものである。 This invention was made as a countermeasure to the above-mentioned conventional example, and is a double-pipe tuyere coated with an insulator to prevent sparks between the double-pipe tuyere and the tuyere brick in bottom-blowing electric furnace gas. The present invention also provides a bottom-blowing electric furnace in which the double-tube tuyeres are grounded.
以下、この発明による実施例を第３図ないし第
４図にもとづいて具体的に説明する。図において
従来例と反応する箇所及び部品は同一符号を付し
て説明する。第３図はガス底電気炉の断面図、第
４図はその羽口の拡大詳細図であり、１は炉壁レ
ンガ、２は炉床スタンプ、４は鉄皮である。６は
羽口レンガである。上記羽口レンガ６の中央部に
は内管８、外管９からなる二重管羽口１０が装着
されている。上記二重管羽口１０の羽管表面に
は、マイカ等の絶縁物１１のコーテイング処理が
施されており、しかも二重管羽口１０にはアース
１２が取付けられている。また上記二重管羽口１
０の内管８と外管９との間にはAr、N2、CO2等
のCmHn系の冷却ガス１３を導入し、内管８には
溶解促進、脱炭、昇温等のためのO2ガス１４を
導入する。 Hereinafter, embodiments of the present invention will be described in detail with reference to FIGS. 3 and 4. In the figures, parts and parts that react with those of the conventional example will be described with the same reference numerals. Fig. 3 is a cross-sectional view of a gas bottom electric furnace, and Fig. 4 is an enlarged detailed view of its tuyere, in which 1 is a furnace wall brick, 2 is a hearth stamp, and 4 is an iron skin. 6 is a tuyere brick. A double pipe tuyere 10 consisting of an inner pipe 8 and an outer pipe 9 is attached to the center of the tuyere brick 6. The surface of the quill of the double-pipe tuyere 10 is coated with an insulator 11 such as mica, and a ground 12 is attached to the double-pipe tuyere 10. In addition, the double pipe tuyere 1
A CmHn-based cooling gas 13 such as Ar, N2, CO2, etc. is introduced between the inner tube 8 and outer tube 9 of 0, and O2 is introduced into the inner tube 8 to promote dissolution, decarburization, temperature increase, etc. 2 Introduce gas 14.
なお、電気炉体鉄皮４には従来通りアース５が
取付けられている。 Note that a ground 5 is attached to the electric furnace body shell 4 as before.
以上詳細に説明したように、この発明による底
吹き電気炉は二重管羽口１０の外管表面に絶縁物
をコーデング処理したものを使用しているので、
これにアースを取付けることにより、羽口レンガ
と二重管羽口との間のスパークは皆無となる。従
つてスパークによる羽口の溶損がなく、ガス洩れ
は発生しないので安全な操業維持が可能となる。 As explained in detail above, the bottom blowing electric furnace according to the present invention uses the outer tube surface of the double tube tuyere 10 coated with an insulating material.
By attaching a ground to this, there will be no spark between the tuyere brick and the double pipe tuyere. Therefore, there is no erosion of the tuyeres due to sparks, and no gas leakage occurs, making it possible to maintain safe operation.
第１図ないし第２図は従来例の電気炉構造を示
す縦断面図、第３図はこの発明による底吹き電気
炉の構造を示す縦断面図、第４図は第３図の羽口
の拡大詳細図である。
１……炉壁レンガ、２……炉床スタンプ、３…
…炉床レンガ、４……鉄皮、５……アース、６…
…羽口レンガ、８……内管、９……外管、１０…
…二重管羽口、１１……絶縁物、１２……アー
ス、１３……冷却ガス、１４……O2ガス。
1 and 2 are longitudinal sectional views showing the structure of a conventional electric furnace, FIG. 3 is a longitudinal sectional view showing the structure of a bottom blowing electric furnace according to the present invention, and FIG. It is an enlarged detailed view. 1... Hearth brick, 2... Hearth stamp, 3...
...Hearth brick, 4...Iron skin, 5...Earth, 6...
...tuyere brick, 8...inner pipe, 9...outer pipe, 10...
...Double tube tuyere, 11...Insulator, 12...Earth, 13...Cooling gas, 14... O2 gas.
Claims (1)
し、上記二重管羽口にアースを取付けてなること
を特徴とする底吹き電気炉。1. A bottom-blowing electric furnace characterized in that the surface of the outer tube of a double-pipe tuyere is coated with an insulating material, and a ground is attached to the double-pipe tuyere.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP56074473A JPS57188980A (en) | 1981-05-18 | 1981-05-18 | Bottom-blowing electric furnace |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP56074473A JPS57188980A (en) | 1981-05-18 | 1981-05-18 | Bottom-blowing electric furnace |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| JPS57188980A JPS57188980A (en) | 1982-11-20 |
| JPS6237685B2 true JPS6237685B2 (en) | 1987-08-13 |
Family
ID=13548256
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP56074473A Granted JPS57188980A (en) | 1981-05-18 | 1981-05-18 | Bottom-blowing electric furnace |
Country Status (1)
| Country | Link |
|---|---|
| JP (1) | JPS57188980A (en) |
Citations (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPS5092807A (en) * | 1973-12-14 | 1975-07-24 |
-
1981
- 1981-05-18 JP JP56074473A patent/JPS57188980A/en active Granted
Patent Citations (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPS5092807A (en) * | 1973-12-14 | 1975-07-24 |
Also Published As
| Publication number | Publication date |
|---|---|
| JPS57188980A (en) | 1982-11-20 |
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