JPS5815714B2 - Scrap charging method - Google Patents
Scrap charging methodInfo
- Publication number
- JPS5815714B2 JPS5815714B2 JP55058997A JP5899780A JPS5815714B2 JP S5815714 B2 JPS5815714 B2 JP S5815714B2 JP 55058997 A JP55058997 A JP 55058997A JP 5899780 A JP5899780 A JP 5899780A JP S5815714 B2 JPS5815714 B2 JP S5815714B2
- Authority
- JP
- Japan
- Prior art keywords
- electric furnace
- preheating
- furnace
- scrap
- charging method
- 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
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】
この発明は電気炉へスクラップを装入する方法に関する
ものである。DETAILED DESCRIPTION OF THE INVENTION The present invention relates to a method for charging scrap into an electric furnace.
製鋼用電気炉のエネルギー効率を増すために、原料スク
ラップを電気炉排出ガスで予熱する方法が用いられる
第１図は予熱炉付製鋼用電気炉システムの１９１で、１
は電気炉、２は排出ガス導管、３はスクラップ予熱炉、
４はバイパス、５は空気、および／または、水による直
接および／または間接冷却郡６はバッグフィルター、７
は排風機、８はスタックを示す。In order to increase the energy efficiency of steelmaking electric furnaces, a method of preheating raw material scrap with electric furnace exhaust gas is used.
is an electric furnace, 2 is an exhaust gas pipe, 3 is a scrap preheating furnace,
4 is a bypass, 5 is air and/or water direct and/or indirect cooling group 6 is a bag filter, 7
8 indicates an exhaust fan, and 8 indicates a stack.
排風機７が排出ガスの流れに対して１流にあるのは電気
炉１を除（全システムを減圧下に保ち、粉塵、ヒユーム
、有害ガスなどを外部に排出しないためである。The reason why the exhaust fan 7 is in the first stream with respect to the flow of exhaust gas is to maintain the entire system (except for the electric furnace 1) under reduced pressure and not to discharge dust, fumes, harmful gases, etc. to the outside.
（電気炉内は電極の酸イ［を防止するために大気圧また
はい（ぶん正の圧に保つことが多い。(The inside of an electric furnace is often kept at atmospheric pressure or a positive pressure to prevent acidity from forming on the electrodes.
）もし予熱炉における圧損失が多いと、熱回収と引換え
に動力使用量が増加するため、予熱炉使用の効果が減る
ことになるので、イカにして圧損失を減らすかがこの種
システムの重要な課題になっている。) If the pressure loss in the preheating furnace is large, the amount of power used will increase in exchange for heat recovery, which will reduce the effectiveness of using the preheating furnace, so it is important for this type of system to reduce the pressure loss. This has become a major issue.
原料スクラップはブロック状のものとだらい粉と呼ばれ
るような小粒小片の増量材から成るものとの２種類があ
り、前者は油分等が少なく予熱時に熱分解ガスの発生の
少ないもので、後者は一般に油分含有量が多く予熱した
際、有害な熱分解ガスを発生する。There are two types of raw material scrap: those in the form of blocks and those consisting of small pieces of bulking material called daidai powder.The former contains less oil and generates less pyrolysis gas during preheating, and the latter Generally, they have a high oil content and generate harmful thermal decomposition gas when preheated.
この発明の目的は低動力原単位、高熱回収率で、かつ環
境汚染を少なくして上記した型式の電気炉システムを運
転するためのスクラップ装入方法を提供することで、そ
の特徴として前記２種類のスクラップのうち、ブロック
状のもののみを予熱炉に使用し、小片、小粒のものは、
予熱しないで、ブロック状のものを電気炉に投入した後
に電気炉に装入する手段をとるのである。The purpose of this invention is to provide a scrap charging method for operating the above-mentioned type of electric furnace system with low power consumption, high heat recovery rate, and less environmental pollution. Among the scraps, only block-shaped ones are used in the preheating furnace, and small pieces and small particles are
Instead of preheating, a method is used in which the block-shaped material is placed in the electric furnace and then charged into the electric furnace.
小粒、小片を直接電気炉内に投入すれば、その含有油分
は同炉内で熱分解し、発生ガスが電気炉内または電気炉
と導管２との継手部分などで系内へ進入する空気により
燃焼して排出ガスの温度を上昇させ、予熱炉の効率を上
げるばかりでな（、小粒、小片により電気炉内のスクラ
ップの表面を均一水平にすることができ、電弧が安定す
る効果がある。If small particles or pieces are directly put into the electric furnace, the oil content will be thermally decomposed in the furnace, and the generated gas will be released by the air entering the system inside the electric furnace or at the joint between the electric furnace and the conduit 2. Not only does it increase the temperature of the exhaust gas through combustion, increasing the efficiency of the preheating furnace, but the small particles and pieces can make the surface of the scrap in the electric furnace uniform and level, which has the effect of stabilizing the electric arc.
また含油成分は多分に悪臭を有するガスを発生するが、
このガスが電気炉内の高温度のふん囲気で分解され悪臭
を減する効果がある。In addition, oil-containing components generate gases that often have bad smells,
This gas is decomposed in the high-temperature surrounding air inside the electric furnace, which has the effect of reducing bad odors.
また、だらい粉などの小粒、小片は予熱の温度によって
は半溶融して、予熱炉の内面に付着し、予熱炉の耐用期
間を短縮し、また底扉の開閉を困難ならしめることがあ
るが、予熱を行わないことによりこれらを無くすること
ができる。Also, depending on the preheating temperature, small particles and pieces of soybean powder may become semi-molten and adhere to the inner surface of the preheating furnace, shortening the service life of the preheating furnace and making it difficult to open and close the bottom door. However, these can be eliminated by not performing preheating.
さらに、予熱炉内はブロック状のもののみであるから、
安定均一に加熱でき、圧損失が少な（、予熱炉から電気
炉へ投入の際のヒユーム有害ガスの発生量が少な（なる
。Furthermore, since the inside of the preheating furnace is only block-shaped,
It can be heated stably and uniformly, with little pressure loss (and the amount of fume harmful gas generated when charging from the preheating furnace to the electric furnace is small).
以上のように、この発明の実施により、熱効率が向上し
、動力源単位が低下し、環境汚染が減る。As described above, by implementing the present invention, thermal efficiency is improved, power source units are reduced, and environmental pollution is reduced.
第１図は本発明実施の対象となる電気炉システムの工程
図の１例である。
１・・・電気炉、２・・・電気炉出口導管、３・・・ス
クラップ予熱炉、４・・・バイパス、５・・・冷却器、
６・・・除塵器、７・・・排風機、８・・・スタック。FIG. 1 is an example of a process diagram of an electric furnace system to which the present invention is implemented. DESCRIPTION OF SYMBOLS 1... Electric furnace, 2... Electric furnace outlet conduit, 3... Scrap preheating furnace, 4... Bypass, 5... Cooler,
6...dust remover, 7...exhaust fan, 8...stack.
Claims (1)
に装入することを特徴とする予熱器付電女炉へのスクラ
ップ装入方法。1. A method for charging scrap into an electric furnace equipped with a preheater, characterized in that large lumps are preheated and small particles and pieces are charged into the electric furnace without preheating.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP55058997A JPS5815714B2 (en) | 1980-05-02 | 1980-05-02 | Scrap charging method |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP55058997A JPS5815714B2 (en) | 1980-05-02 | 1980-05-02 | Scrap charging method |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| JPS56155381A JPS56155381A (en) | 1981-12-01 |
| JPS5815714B2 true JPS5815714B2 (en) | 1983-03-26 |
Family
ID=13100488
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP55058997A Expired JPS5815714B2 (en) | 1980-05-02 | 1980-05-02 | Scrap charging method |
Country Status (1)
| Country | Link |
|---|---|
| JP (1) | JPS5815714B2 (en) |
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPH0338328Y2 (en) * | 1984-10-11 | 1991-08-13 | ||
| JPH0443591Y2 (en) * | 1985-08-27 | 1992-10-14 |
Families Citing this family (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| DK200200178A (en) | 2002-02-06 | 2003-08-07 | Vestas Wind Sys As | Wind turbine tower suspension means |
-
1980
- 1980-05-02 JP JP55058997A patent/JPS5815714B2/en not_active Expired
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPH0338328Y2 (en) * | 1984-10-11 | 1991-08-13 | ||
| JPH0443591Y2 (en) * | 1985-08-27 | 1992-10-14 |
Also Published As
| Publication number | Publication date |
|---|---|
| JPS56155381A (en) | 1981-12-01 |
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