JPS62235414A - Method for recovering heat of exhaust gas from dual melting furnace - Google Patents
Method for recovering heat of exhaust gas from dual melting furnaceInfo
- Publication number
- JPS62235414A JPS62235414A JP61077994A JP7799486A JPS62235414A JP S62235414 A JPS62235414 A JP S62235414A JP 61077994 A JP61077994 A JP 61077994A JP 7799486 A JP7799486 A JP 7799486A JP S62235414 A JPS62235414 A JP S62235414A
- Authority
- JP
- Japan
- Prior art keywords
- exhaust gas
- furnace
- furnace shell
- shell
- melting
- 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
- 238000002844 melting Methods 0.000 title claims abstract description 42
- 230000008018 melting Effects 0.000 title claims abstract description 42
- 238000000034 method Methods 0.000 title claims description 4
- 230000009977 dual effect Effects 0.000 title description 3
- 238000002485 combustion reaction Methods 0.000 claims abstract description 17
- 239000002184 metal Substances 0.000 claims abstract description 17
- 239000002994 raw material Substances 0.000 claims description 5
- 239000000428 dust Substances 0.000 abstract description 4
- 230000009965 odorless effect Effects 0.000 abstract description 4
- 238000005979 thermal decomposition reaction Methods 0.000 abstract 1
- 239000007789 gas Substances 0.000 description 49
- 235000019645 odor Nutrition 0.000 description 10
- 239000000446 fuel Substances 0.000 description 6
- 238000002347 injection Methods 0.000 description 5
- 239000007924 injection Substances 0.000 description 5
- 239000003575 carbonaceous material Substances 0.000 description 4
- 230000005611 electricity Effects 0.000 description 3
- 230000000694 effects Effects 0.000 description 2
- 238000004519 manufacturing process Methods 0.000 description 2
- 238000011084 recovery Methods 0.000 description 2
- 241000257465 Echinoidea Species 0.000 description 1
- QVGXLLKOCUKJST-UHFFFAOYSA-N atomic oxygen Chemical compound [O] QVGXLLKOCUKJST-UHFFFAOYSA-N 0.000 description 1
- 239000004020 conductor Substances 0.000 description 1
- 238000007796 conventional method Methods 0.000 description 1
- 238000001816 cooling Methods 0.000 description 1
- 238000010586 diagram Methods 0.000 description 1
- 238000009434 installation Methods 0.000 description 1
- 210000004072 lung Anatomy 0.000 description 1
- 239000000155 melt Substances 0.000 description 1
- 239000001301 oxygen Substances 0.000 description 1
- 229910052760 oxygen Inorganic materials 0.000 description 1
- 238000002360 preparation method Methods 0.000 description 1
- 239000000243 solution Substances 0.000 description 1
- 238000009628 steelmaking Methods 0.000 description 1
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 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
Landscapes
- Refinement Of Pig-Iron, Manufacture Of Cast Iron, And Steel Manufacture Other Than In Revolving Furnaces (AREA)
- Waste-Gas Treatment And Other Accessory Devices For Furnaces (AREA)
- Furnace Details (AREA)
Abstract
Description
【発明の詳細な説明】
（産業上の利用分野）
この発明はスクラップを溶解する溶解炉に係り、特に２
基一対の炉を右する複式溶解炉の排ガス熱回収方法に関
１−る。[Detailed Description of the Invention] (Industrial Application Field) The present invention relates to a melting furnace for melting scrap, and particularly relates to a melting furnace for melting scrap.
This invention relates to an exhaust gas heat recovery method for a multiple melting furnace having a pair of furnaces.
（従来の技術〕
従来、２基一対の炉を有する複式溶解炉として、操業側
の炉殻で発生した排ガスを特別側のが殻内に導入するよ
うにして、持槻側炉殻内に装入したスクラップを予熱す
る製鋼設備（持分Ｉ１１５９−４７８３１号公報、特開
昭４８−４５９３７号公報）がＩ２案されている。(Prior art) Conventionally, as a multiple melting furnace having a pair of two furnaces, exhaust gas generated in the operating side furnace was introduced into the special side furnace shell, and the furnace was installed in the Mochitsuki side furnace shell. A steel making facility (I1159-47831, Japanese Patent Application Laid-open No. 48-45937) that preheats the input scrap has been proposed.
上記のようにして操業することにより、出Ｍ後に補柊、
原料装入を経て通電するまでのアイドルタイムを除くこ
とができるとともに操業に入る側の炉内のスクラップは
υ１ガスで予熱されるため溶解時間を短縮することがで
さるとされている。By operating as described above, after the production of M, the
It is said that it is possible to eliminate the idle time from charging the raw materials to turning on the electricity, and to shorten the melting time because the scrap in the furnace on the side that enters operation is preheated with υ1 gas.
ｌ記従来の複式溶解炉では、操業側の炉殻から待機側の
炉殻内へ排ガスの仝？が単純にそのま）導入されるだけ
なので、待機側の炉殻内を通過したの’５ （のまＳ＋
Ｊｌ出されることになり、その結果、排ガスエネルギー
を十分に回収することができず、また特典側の炉殻内で
予熱され原料から発生した臭気は、別途説央設備を設け
ない限りそのま）大気中に放出されることになり、悪臭
をまき散らずことになる。このようなことから、取扱う
原料には臭気を含まないものに限定を受けるという欠点
があった。ざらに排ガス中に未燃ガスが寮母に含まれる
場合には一層熱エネルギーの回収効率が低下するという
問題がある。1. In conventional multiple melting furnaces, there is no flow of exhaust gas from the operating side furnace shell into the standby side furnace shell. Since it is simply introduced as is, it passes through the furnace shell on the standby side.
As a result, the exhaust gas energy cannot be fully recovered, and the odor generated from the raw materials preheated in the furnace shell on the benefit side will remain as is unless separate cooling equipment is installed) It will be released into the atmosphere and will not spread any bad odor. For this reason, there is a drawback that the raw materials that can be handled are limited to those that do not contain odors. Furthermore, if unburned gas is included in the exhaust gas, there is a problem in that the thermal energy recovery efficiency is further reduced.
上記従来技術の問題点を解決覆るため、この発明におい
ては、２基一対の炉殻を有し、一方が操業側となるとぎ
他方を原料予熱側とする複式溶解炉において、上記各炉
殻に連通覆る初期溶湯供給用炉殻ど、前記各炉殻を接続
する排ガスダクト中に介装ザる燃焼筒どを用い、操業側
の炉殻からの１ノ１ガス中の未燃ガスを燃焼筒で燃焼さ
せたのちに予熱側の炉殻へ導入し、当該予熱側の炉殻内
でスクラップを予熱したのちの排ガスを初期溶湯供給用
炉殻内に導入して排ガス中の臭気成分を分解するにうに
したことを特徴とするものである。In order to solve and overcome the problems of the prior art, the present invention provides a dual melting furnace having a pair of furnace shells, one of which serves as the operating side and the other as the raw material preheating side. Using a communicating furnace shell for supplying initial molten metal and a combustion tube interposed in the exhaust gas duct connecting each of the furnace shells, unburned gas in the 1-1 gas from the furnace shell on the operating side is transferred to the combustion tube. After the scrap is combusted in the furnace shell on the preheating side, it is introduced into the furnace shell on the preheating side, and the exhaust gas after preheating the scrap is introduced into the furnace shell for initially supplying molten metal to decompose the odor components in the exhaust gas. It is characterized by a sea urchin.
上記の方法を採用することにより、炭材 ｇ素等の吹込
み溶解にＪζり発生ずるＣＯを主成分とする寮母の未燃
ガスを燃焼して排ガスの熱エネルギーを高め、イの高温
排ガスを予熱側の炉殻内へ導入するため、排ガスエネル
ギーの有効利用がはかられ、また予熱側の炉殻からの排
ガスを初期溶湯供給用溶解炉へ導入して高温の炉内で熱
分解させることにより、臭気を発生するスクラップの予
熱であっＣも操業側の炉からの０温排ガスのすべてを予
熱に使用することがＣき、スクラップの種類に関係なく
無臭高温予熱を行なうことができる。By adopting the above method, the unburned gas mainly composed of CO generated during the injection and melting of carbonaceous materials, etc., is combusted, the thermal energy of the exhaust gas is increased, and the high-temperature exhaust gas of (a) is Since it is introduced into the furnace shell on the preheating side, the exhaust gas energy can be used effectively, and the exhaust gas from the furnace shell on the preheating side is introduced into the melting furnace for supplying initial molten metal and is thermally decomposed in the high temperature furnace. Therefore, all of the zero-temperature exhaust gas from the operating furnace can be used for preheating scrap that generates odor, and odorless high-temperature preheating can be performed regardless of the type of scrap.
以下この発明の実施例を添（４図面を参照して説明する
。Embodiments of the present invention will be described below with reference to the accompanying drawings.
図はこの発明の一構成例を示すもので、符号１おにび１
′は一対の溶解炉の炉殻を示し、これら炉殻１，１′の
間に初期溶湯供給用溶解炉の炉殻２が設「されており、
上記一対の溶解炉の炉殻１゜１′と、初期溶湯供給用溶
解炉の炉殻２とは排ガスダクｌ−３，３’で接続されて
いる。The figure shows an example of the configuration of this invention, with reference numerals 1 and 1.
' indicates the furnace shells of a pair of melting furnaces, and the furnace shell 2 of the melting furnace for supplying initial molten metal is installed between these furnace shells 1 and 1'.
The furnace shells 1.1' of the pair of melting furnaces mentioned above and the furnace shell 2 of the melting furnace for initially supplying molten metal are connected by exhaust gas ducts 1-3, 3'.
上記排ガスダクｈ３，３’の途中にはダンパ４゜４′が
介装され、このダンパ４，４′の前後部は、固定された
ダクトから炉体を切り離すためのブレーク７ランジ５．
５’ 、６＋ ６’ で接続されている。A damper 4°4' is interposed in the middle of the exhaust gas duct h3, 3', and the front and rear parts of the damper 4, 4' are connected to a break 7, a lung 5.5 for separating the furnace body from the fixed duct.
They are connected at 5' and 6+6'.
また、一対の溶解炉の炉殻１，１′間は別の排ガスダク
ト７で接続されている。この排ガスダク１−７は、各炉
殻１，１′にブレークフランジ８゜８′を介して接続さ
れ、この排ガスダクＩ〜７の途中には、操業側の溶解炉
の炉殻１または１′内で発生した未燃ガスを含む排ガス
を燃焼さける燃焼筒９が接続されている。Further, the furnace shells 1 and 1' of the pair of melting furnaces are connected by another exhaust gas duct 7. This exhaust gas duct 1-7 is connected to each furnace shell 1, 1' via a break flange 8. A combustion tube 9 is connected thereto to avoid combustion of exhaust gas including unburned gas generated within the chamber.
前記初期溶湯供給用溶解炉の炉殻２には、集塵￥ｔｖＬ
１０に通ずるバイパスラインの排ガスダクト１１が接続
されている。In the furnace shell 2 of the melting furnace for supplying the initial molten metal, there is a dust collection
An exhaust gas duct 11 of a bypass line leading to 10 is connected.
図にＪ３いて符号１２．１２’ はスパウト、１３＋、
１電極、１４は二次側導体、１５は給電用ケーブル、１
６は電源（炉用変圧器）、１７は溶潟供給用もＩをそれ
ぞれ示している。In the figure, J3 has the symbol 12.12' is the spout, 13+,
1 electrode, 14 is the secondary conductor, 15 is the power supply cable, 1
Reference numeral 6 indicates a power source (furnace transformer), and 17 indicates I for supplying the molten lagoon.
そして、これら通電溶解のための設置ｆ５１３〜１６は
、初期溶湯供給用溶解炉２のみならず一対の溶解炉Ｉ
Ｊ３よび１′にも供用できるように設（荀されている。These installations F513 to F16 for energized melting are not only for the melting furnace 2 for supplying initial molten metal but also for the pair of melting furnaces I.
It is installed so that it can also be used for J3 and 1'.
つぎに操業の態様について説明する。Next, the mode of operation will be explained.
いま、一対の溶解炉のうら一方の炉殻１を操業側の炉と
し、他方の炉殻１′を予熱側の炉とでるとさ、操業中の
炉殻１では溶浅ｉ中に炭材、Ｆｌｆｆ素などの燃料が吹
込まれ、炉殻１内に装入されたスクラップが溶解されて
いる。Now, suppose that one of the furnace shells 1 of the pair of melting furnaces is used as the operating side furnace, and the other furnace shell 1' is used as the preheating side furnace. , Flff or other fuel is injected into the furnace shell 1, and the scrap charged into the furnace shell 1 is melted.
また、初期溶湯供給用）°ａ解炉の炉殻２では、スクラ
ップを通電溶解中である。In addition, in the furnace shell 2 of the melting furnace (for supplying initial molten metal), scrap is being melted with electricity.
この場合において、ダンパ４を閉じの状［ぶにしておき
、操業側の溶解炉の炉殻１からの排ガスを燃焼筒９に導
入し、この燃焼筒９において操業側の炉殻１内で発生し
たＣＯガガスどの未燃ガ、スを含むＩＪＩガスを燃焼さ
せ、枡、ガスの熱エネルギーを高め、−との高温ガスを
予熱側の炉殻１′へ心入してスクラップの予熱効果を増
大し、予熱後の臭気を含んだ排ガスは通電操業中の初期
溶潟供給用溶前炉の炉殻２内で熱分解して無臭とし、集
塵装置１０を通じて人気に放出される。In this case, the damper 4 is kept closed, and the exhaust gas from the furnace shell 1 of the melting furnace on the operating side is introduced into the combustion tube 9, and the exhaust gas generated in the furnace shell 1 on the operation side is introduced into the combustion tube 9. Burn the IJI gas, including any unburned gas and gas, to increase the thermal energy of the gas, and inject the high temperature gas of - into the furnace shell 1' on the preheating side to increase the preheating effect of scrap. However, the odor-containing exhaust gas after preheating is thermally decomposed in the furnace shell 2 of the initial molten lagoon supplying forefurnace during energized operation to become odorless, and is discharged through the dust collector 10.
操業側の溶解炉の炉殻１内のスクラップの溶解が完了す
ると、従来と同様にブレークフランジを１１ａらき、炉
殻１を傾動して出湯する。When the melting of the scrap in the furnace shell 1 of the melting furnace on the operation side is completed, the break flange 11a is opened and the furnace shell 1 is tilted to tap the melt, as in the conventional method.
なお、溶解炉の炉殻１での操業が完了する直前に炉殻１
′での操業開始準備として燃料吹込みのための初＋９Ｊ
溶渇を樋１７を通じてスパウ１−１２’にり炉殻１′内
に供給しておく。そして炉殻１での操業を完了したと同
時に今度は炉殻１′が操業側の炉どなり、炭材、′Ｍ素
等の燃料を吹込み、溶解作業を開始する。このときダン
パ４′を閉じておくことににす、前記と同様に炉殻１′
からの排ガスを排ガスダクｈ ７を通じて燃焼筒９に導
入し、こ・でＣＯガガスどの未燃ガスを燃焼させ、熱エ
ネルギーがｉへめられた高温ガスを予熱側となっている
炉殻１内へ導入してスクラップを効率よく予熱する。In addition, just before the operation in the furnace shell 1 of the melting furnace is completed, the furnace shell 1
The first +9J for fuel injection in preparation for the start of operation at
The molten water is supplied through the gutter 17 to the spout 1-12' and into the furnace shell 1'. Then, at the same time as the operation in the furnace shell 1 is completed, the furnace shell 1' is turned into a furnace on the operating side, and fuel such as carbonaceous material and M element is injected to start melting work. At this time, we will keep the damper 4' closed, and as before, we will close the furnace shell 1'.
The exhaust gas is introduced into the combustion tube 9 through the exhaust gas duct h7, where unburned gas such as CO, gas, etc. to efficiently preheat the scrap.
上記尖旗例の説明は、通常の省電力操業の場合であるが
、例えば電気料金が低回な夜間などにおいては、初期溶
湯生成のための？８解の合間にＩ＋ ：Ｗ′。The explanation of the flag example above is for normal power-saving operation, but for example at night when electricity rates are low, it may be necessary to use it for initial molten metal production. I+:W' between 8 solutions.
側の炉の１ノへ通電溶解のための装置１３〜１５を旋回
移動し、（駆動設品冒Ｊ図示略）燃ＩＩ吹込み溶解に加
えて通電溶解を０１用して、操業時間の短縮をはかるこ
ともでさる。The apparatuses 13 to 15 for energization melting are moved to No. 1 of the side furnace (driving equipment not shown), and energization melting is used in addition to the fuel injection melting to shorten the operating time. It is also possible to measure.
なお図示の実施例においては、三相交流アーク炉を用い
た場合についで示しであるが、これに限定されるもので
はなく、直流アーク炉、燃焼炉などの溶解炉であっても
よいことはもちろんである。In the illustrated embodiment, a three-phase AC arc furnace is used, but the present invention is not limited to this, and melting furnaces such as DC arc furnaces and combustion furnaces may also be used. Of course.
以上説明したように、この発明は、２基一対とづる炉殻
を右し、一方が操業側とイヱるとぎ他方が予熱側どなる
複式溶解炉において、上記各炉殻に連通する初期溶湯供
給用炉殻と、前記各炉殻を接続する刊ガスダクト中に介
装する燃焼筒とを用い、操業側の炉殻からの排ガス中の
未燃ガスを燃焼筒で燃焼させたのちに予熱側の炉殻へ導
入し、当該予熱側の炉殻内でスクラップを予熱したの１
５のＩＪＩガスを初期溶湯供給ｍ４殻内に導入して排ガ
ス中の臭気成分を分解するようにしたので、炭材や酸素
等の燃料の吹込みにより発生するＣＯを主成分とする人
足の未燃ガスが燃焼筒において燃焼して排ガスの熱エネ
ルギーが高められ、ぞの高温ガスを予熱側の炉へ導入す
ることにより排ガスエネルギーの有効利用を高効率には
かることができる。As explained above, the present invention provides a dual melting furnace with a pair of furnace shells, one for the operating side and one for the preheating side, and an initial molten metal supply communicating with each of the furnace shells. Using a combustion furnace shell and a combustion tube interposed in a gas duct connecting each of the furnace shells, unburned gas in the exhaust gas from the operation side furnace shell is combusted in the combustion tube, and then the preheating side combustion tube is used. The scrap was introduced into the furnace shell and preheated in the furnace shell on the preheating side.
The IJI gas in step 5 was introduced into the initial molten metal supply m4 shell to decompose the odor components in the exhaust gas, so it was possible to eliminate the presence of CO, which is the main component, generated by the injection of fuel such as carbonaceous material and oxygen. Unburned gas is combusted in the combustion tube, increasing the thermal energy of the exhaust gas, and by introducing the high-temperature gas into the preheating furnace, the exhaust gas energy can be used effectively with high efficiency.
また、予熱側のスクラップから発生ずる臭気成分は初期
溶湯供給用溶解炉に導入されて？３温炉内で熱分解され
るため、臭気の排出がないと同時に臭気を発生１′るス
クラップの予熱に際しても操業側の炉からの高温排ガス
の仝且を予熱に使用することができる。これらにより炭
材やＭ索等の燃料吹込みにより発生ずる人足の排ガスエ
ネルギーを有効に利用することが可能となるとともに、
スクラップの品質に制約を受けることなく無臭高温予熱
を行なうことができる優れた効果が１！１られる。Also, are the odor components generated from the scrap on the preheating side introduced into the melting furnace for supplying the initial molten metal? Since the scrap is thermally decomposed in a three-temperature furnace, no odor is emitted, and at the same time, the high-temperature exhaust gas from the operating furnace can be used for preheating scrap that generates odor. These make it possible to effectively utilize the exhaust gas energy generated by human foot traffic due to the injection of fuel such as carbonaceous materials and M cables, and
The excellent effect of being able to perform odorless and high temperature preheating without being constrained by the quality of scrap is 1!1.
図はこの発明の一実施例を示１構成図である。
１．１′・・・溶解炉の炉殻、２・・・初期溶湯供給用
溶解炉の炉；ａ、３．３′、７・・・排ガスダクト、４
．４′・・・ダンパ、９・・・燃焼筒、１０・・・集塵
装置。
出願人 石川島播磨重工業株式会社
川崎製鉄株式会社The figure is a configuration diagram showing an embodiment of the present invention. 1.1'... Furnace shell of the melting furnace, 2... Furnace of the melting furnace for supplying initial molten metal; a, 3.3', 7... Exhaust gas duct, 4
．． 4'... Damper, 9... Combustion cylinder, 10... Dust collector. Applicant Ishikawajima-Harima Heavy Industries Co., Ltd. Kawasaki Steel Corporation
Claims (1)
原料予熱側となる複式溶解炉において、上記各炉殻に連
通する初期溶湯供給用炉殻と、前記各炉殻を接続する排
ガスダクト中に介装する燃焼筒とを用い、操業側の炉殻
からの排ガス中の未燃ガスを燃焼筒で燃焼させたのちに
予熱側の炉殻へ導入し、当該予熱側の炉殻内で予熱した
のちの排ガスを初期溶湯供給用炉殻内に導入して排ガス
中の臭気成分を分解するようにしたことを特徴とする複
式溶解炉の排ガス熱回収方法。In a multiple melting furnace having a pair of furnace shells, one of which is on the operation side and the other is on the raw material preheating side, each of the furnace shells is connected to an initial molten metal supply furnace shell that communicates with each of the furnace shells. The unburned gas in the exhaust gas from the operation side furnace shell is combusted in the combustion tube, and then introduced into the preheating side furnace shell. A method for recovering exhaust gas heat from a multiple melting furnace, characterized in that the exhaust gas is preheated in the shell and then introduced into the furnace shell for initially supplying molten metal to decompose odor components in the exhaust gas.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP7799486A JPH07803B2 (en) | 1986-04-04 | 1986-04-04 | Exhaust gas heat recovery method for dual melting furnace |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP7799486A JPH07803B2 (en) | 1986-04-04 | 1986-04-04 | Exhaust gas heat recovery method for dual melting furnace |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| JPS62235414A true JPS62235414A (en) | 1987-10-15 |
| JPH07803B2 JPH07803B2 (en) | 1995-01-11 |
Family
ID=13649366
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP7799486A Expired - Lifetime JPH07803B2 (en) | 1986-04-04 | 1986-04-04 | Exhaust gas heat recovery method for dual melting furnace |
Country Status (1)
| Country | Link |
|---|---|
| JP (1) | JPH07803B2 (en) |
Citations (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPS58156185A (en) * | 1982-03-12 | 1983-09-17 | 川崎重工業株式会社 | Preheater for scrap of electric furnace |
| JPS591982A (en) * | 1982-06-28 | 1984-01-07 | 大同特殊鋼株式会社 | Arc-furnace melting method |
| JPS6155579A (en) * | 1984-08-25 | 1986-03-20 | 合同製鉄株式会社 | Method of preheating scrap by exhaust gas from electric steel-making furnace |
-
1986
- 1986-04-04 JP JP7799486A patent/JPH07803B2/en not_active Expired - Lifetime
Patent Citations (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPS58156185A (en) * | 1982-03-12 | 1983-09-17 | 川崎重工業株式会社 | Preheater for scrap of electric furnace |
| JPS591982A (en) * | 1982-06-28 | 1984-01-07 | 大同特殊鋼株式会社 | Arc-furnace melting method |
| JPS6155579A (en) * | 1984-08-25 | 1986-03-20 | 合同製鉄株式会社 | Method of preheating scrap by exhaust gas from electric steel-making furnace |
Also Published As
| Publication number | Publication date |
|---|---|
| JPH07803B2 (en) | 1995-01-11 |
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