JPS6075510A - Method for supplying coolant scrap in continuous steel making furnace - Google Patents
Method for supplying coolant scrap in continuous steel making furnaceInfo
- Publication number
- JPS6075510A JPS6075510A JP58180405A JP18040583A JPS6075510A JP S6075510 A JPS6075510 A JP S6075510A JP 58180405 A JP58180405 A JP 58180405A JP 18040583 A JP18040583 A JP 18040583A JP S6075510 A JPS6075510 A JP S6075510A
- Authority
- JP
- Japan
- Prior art keywords
- furnace
- scrap
- lances
- coating material
- slag
- 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.)
- Pending
Links
Classifications
-
- C—CHEMISTRY; METALLURGY
- C21—METALLURGY OF IRON
- C21C—PROCESSING OF PIG-IRON, e.g. REFINING, MANUFACTURE OF WROUGHT-IRON OR STEEL; TREATMENT IN MOLTEN STATE OF FERROUS ALLOYS
- C21C5/00—Manufacture of carbon-steel, e.g. plain mild steel, medium carbon steel or cast steel or stainless steel
- C21C5/56—Manufacture of steel by other methods
- C21C5/567—Manufacture of steel by other methods operating in a continuous way
-
- 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
- Engineering & Computer Science (AREA)
- Chemical & Material Sciences (AREA)
- Manufacturing & Machinery (AREA)
- Materials Engineering (AREA)
- Metallurgy (AREA)
- Organic Chemistry (AREA)
- Refinement Of Pig-Iron, Manufacture Of Cast Iron, And Steel Manufacture Other Than In Revolving Furnaces (AREA)
Abstract
Description
【発明の詳細な説明】
〔本発明の技術分野〕
本発明は、複数本の酸素ランスを有する連続製鋼炉にお
ける塗材スクラップの供給方法に関する。DETAILED DESCRIPTION OF THE INVENTION [Technical Field of the Invention] The present invention relates to a method for feeding coating material scrap in a continuous steelmaking furnace having a plurality of oxygen lances.
一般的な橋形連続製鋼炉は第１図に示すように、炉本体
１と炉蓋８とから構成されている。As shown in FIG. 1, a typical bridge-type continuous steelmaking furnace is comprised of a furnace body 1 and a furnace lid 8.
炉本体１は前後端に受湯口２及び出湯口３を有し、内面
に耐火材４を内張すして種形状とした密閉炉であり、途
中に耐火材の堰５を設け、反応槽６と鎮静槽７に分割し
鎮静槽７には排滓口１２を設けている。一方炉蓋８は炉
体同様耐火材９で内張すされていて造滓剤投入口１１及
び排気口１０を設けており、上方から２本の酸素ランス
１３及び１４が炉内に挿入できる構造である。溶銑１６
が受湯口２から連続的に供給され、反応槽６において、
２本の酸素ランス１３゜１４から高圧酸素２０が吹き込
まれ、酸化反応によって溶銑が溶鋼に精錬される。同時
に造滓剤１８が投入口１１から炉内に連続的に供給され
、滓化してスラグ１９が形成され、ランス保護及びスラ
グ精錬が行なわれる。酸素ランス１３．１４は、炉内に
おいて溶銑を最も効率的に精錬するために溶湯の流れ方
向に２本の酸素ランス１３，１４が配置される。精錬さ
れた溶鋼は反応槽６から鎮静槽７に流入し、スラグ１９
との分離を行って出湯口３から溶鋼１７として出鋼され
、又スラグ１９は、堰５をオーバフローして鎮静槽７に
入り、排滓口１２から排出される。又炉内で多量に発生
する精錬排ガス２１は排気口１０から排気される。The furnace body 1 is a closed furnace having a hot water inlet 2 and a hot water outlet 3 at the front and rear ends, and a seed-shaped furnace with a refractory material 4 lined on the inner surface. and a sedation tank 7, and the sedation tank 7 is provided with a sludge discharge port 12. On the other hand, the furnace lid 8 is lined with a refractory material 9 like the furnace body, and is provided with a sludge inlet 11 and an exhaust port 10, and has a structure that allows two oxygen lances 13 and 14 to be inserted into the furnace from above. It is. Hot metal 16
is continuously supplied from the inlet 2, and in the reaction tank 6,
High pressure oxygen 20 is blown in from two oxygen lances 13 and 14, and the molten pig iron is refined into molten steel through an oxidation reaction. At the same time, a slag forming agent 18 is continuously supplied into the furnace from the inlet 11, and is turned into slag to form slag 19, thereby performing lance protection and slag refining. Two oxygen lances 13 and 14 are arranged in the flow direction of the molten metal in order to most efficiently refine the molten metal in the furnace. The refined molten steel flows from the reaction tank 6 to the sedation tank 7 and becomes slag 19.
The slag 19 is separated from the slag and tapped as molten steel 17 from the tapping port 3, and the slag 19 overflows the weir 5, enters the calming tank 7, and is discharged from the slag discharge port 12. Further, a large amount of refining exhaust gas 21 generated in the furnace is exhausted from the exhaust port 10.
このような精錬反応によって、多量の反応熱が発生し溶
鋼及びスラグの温度は非常に高くなる。この反応熱は精
錬条件によって異るが、溶銑成分ｃ ＝ ｓ、ｏ％、５
ｉ＝０．３％程度のものをＣ＝０．２％の溶鋼に精錬す
る条件の一例において。Such a refining reaction generates a large amount of reaction heat, and the temperatures of the molten steel and slag become extremely high. This reaction heat varies depending on the refining conditions, but the hot metal component c = s, o%, 5
In an example of the conditions for refining molten steel with approximately i=0.3% to C=0.2%.
溶鋼温度は１／ｉ５０５１７００℃にも達し、なおかつ
スラグ温度は、更に５０℃程度高い温度となる。The molten steel temperature reaches 1/i5051700°C, and the slag temperature becomes about 50°C higher.
このような高温に炉体１の耐火材４がさらされると、耐
火材４の侵食が非常に大きくなり、連続製鋼炉の寿命が
短（なり、実用的に使用できなくなる。If the refractory material 4 of the furnace body 1 is exposed to such high temperatures, the corrosion of the refractory material 4 will be extremely large, and the life of the continuous steelmaking furnace will be shortened, making it unusable for practical use.
このような場合、一般的に採用される方法は。In such cases, the commonly adopted method is:
塗材を炉内に投入し、溶鋼及びスラグの温度を下げるこ
とであり、塗材としては、鉄鉱石、ミルスケール、石灰
石又はスクラップが使用されるが、経済性の点から考え
ると、スクラップを投入する方法が生産量が増加して、
生産コストが低減でき、最も一般的に採用される。この
場合、上記の精錬条件において、塗材スクラップは溶銑
供給量に対し、５〜１０％の投入が可能であり、非常に
大きな生産コスト低減効果があり、耐火材の寿命延長と
共に連続製鋼炉の実用化に対し大きな役割を有している
。The coating material is put into the furnace to lower the temperature of the molten steel and slag. Iron ore, mill scale, limestone, or scrap is used as the coating material, but from an economic point of view, it is preferable to use scrap instead. The method of input increases production volume,
It can reduce production costs and is the most commonly adopted method. In this case, under the above refining conditions, it is possible to input 5 to 10% of the coating material scrap to the amount of hot metal supplied, which has a very large production cost reduction effect, extends the life of the refractory material, and improves the continuous steelmaking furnace. It plays a major role in practical application.
本発明は、塗材スクラップを迅速に溶解させて、炉内の
溶鋼およびスラグを冷却し、これによって炉内の温度を
制御する複数本の酸素ランスを有する連続製鋼炉におけ
る塗材スクラップの供給方法を提供することを目的とす
る。The present invention provides a method for supplying coating material scrap in a continuous steelmaking furnace having a plurality of oxygen lances that rapidly melts coating material scrap to cool the molten steel and slag in the furnace, thereby controlling the temperature in the furnace. The purpose is to provide
そして５本発明は、上記目的を達成する手段として、各
ランスの中間位置であって、炉中心に塗材スクラップを
投入可能な位置に塗材投入口を設けた点にある。すなわ
ち１本発明は、複数本の酸素ランスを有する連続製鋼炉
において、各ランスの中間位置であって、炉中心に塗材
スクラップを投入可能な位置に適当数の塗材投入口を設
け、この投入口より塗材スクラップを連続的に投入する
ことを特徴とする複数本の酸素ランスを有する連続製鋼
炉における塗材スクラップの供給方法である。5. The present invention, as a means for achieving the above object, is that a coating material inlet is provided at an intermediate position between each lance and at a position where coating material scrap can be introduced into the center of the furnace. In other words, the present invention provides a continuous steelmaking furnace having a plurality of oxygen lances, in which an appropriate number of coating material inlets are provided at intermediate positions between the lances and at positions where coating material scraps can be fed into the center of the furnace. This is a method for supplying coating material scraps in a continuous steelmaking furnace having a plurality of oxygen lances, characterized in that coating material scraps are continuously inputted from an input port.
本発明は、酸素ランスとして２本の上吹き酸素ランスを
有する連続製鋼炉の場合も含むものであり、この場合ス
クラップ投入口としては、該酸素ランスの中間位置ない
しは該酸素ランスの両側に配設し、このいづれの場合も
、塗材スクラップを炉中心位置に連続的に投入するもの
である。The present invention also includes the case of a continuous steelmaking furnace having two top-blown oxygen lances as oxygen lances. In this case, the scrap inlet may be provided at an intermediate position between the oxygen lances or on both sides of the oxygen lances. However, in both cases, coating material scraps are continuously fed into the center of the furnace.
以下、第２図〜第５図に基づいて本発明の詳細な説明す
る。第２図は、本発明を実施するための１例であって、
２本の酸素ランスな有する連続製鋼炉の断面図を示す。Hereinafter, the present invention will be explained in detail based on FIGS. 2 to 5. FIG. 2 is an example for implementing the present invention,
1 shows a cross-sectional view of a continuous steelmaking furnace with two oxygen lances.
第２図に示す連続製鋼炉に使用する塗材としてのスクラ
ップ２２は、連続的に投入でき、かつ迅速に溶解して冷
却効果を示す必要がある。そのためスクラップ２２とし
ては、できるだけ清浄なもので、単重１ ｋｙ未満の塊
状のものが適しており、なおかつ酸素ランス直下の高温
部に投入して迅速に溶解せしめ、溶鋼６及びスラグ１９
を冷やす必要がある。そのため２本の酸素ランス１３，
１４を有する連続製鋼炉において、塗材投入口１５を。Scrap 22 as a coating material used in the continuous steelmaking furnace shown in FIG. 2 needs to be able to be continuously fed and melted quickly to exhibit a cooling effect. Therefore, as the scrap 22, it is suitable that it is as clean as possible, in the form of a lump with a unit weight of less than 1 ky, and that it is thrown into the high temperature part directly under the oxygen lance to melt quickly, and the molten steel 6 and slag 19 are
needs to be cooled down. Therefore, two oxygen lances 13,
14, a coating material inlet 15.
２本の酸素ランス１３，１４の中間位置であって、炉の
断面においては、ランス中心に投入可能す位置に設け、
ベルトコンベヤ２３等によって、連続的に塗材スクラッ
プを投入する。Provided at an intermediate position between the two oxygen lances 13 and 14, in a cross section of the furnace, at a position where it can be inserted into the center of the lance,
Coating material scraps are continuously fed by a belt conveyor 23 or the like.
第３図および第４図は、２本の酸素ランスを有する連続
製鋼炉の断面図を示し、この門弟３図は本発明を実施す
るための他の例であり、第４図は、塗材スクラップの具
体的な供給手段を例示するものである。すなわち、第３
図においては、塗材投入口１５を酸素ランス１３，１４
の両側に設置し、塗材スクラップ２２を両側から酸素ラ
ンス直下に投入可能としたものであり。Figures 3 and 4 show cross-sectional views of a continuous steelmaking furnace having two oxygen lances; Figure 3 is another example for carrying out the present invention; This is an example of a specific means for supplying scrap. That is, the third
In the figure, the coating material inlet 15 is connected to the oxygen lances 13 and 14.
The lance is installed on both sides of the oxygen lance, so that coating material scrap 22 can be input directly under the oxygen lance from both sides.
特に連続製鋼炉が大形化した場合の冷却効果を均一にす
るために有効である。又第４図においては、ベルトコン
ベヤ２３等で運ばれた冷材スクラップ２２を、ロークリ
フィーダ又は２重ダンパ等のエヤーロックフィーダ２７
を介して、投入口から炉内に供給可能としたものであり
、炉気の吹出し及び外気の炉内への侵入を防止する目的
に対しては非常に有効である。This is particularly effective for uniformizing the cooling effect when the continuous steelmaking furnace is enlarged. Further, in FIG. 4, the cold material scrap 22 conveyed by a belt conveyor 23 or the like is transferred to an air lock feeder 27 such as a row feeder or a double damper.
It can be supplied into the furnace from the inlet through the inlet, and is very effective for the purpose of preventing the blowing of furnace air and the intrusion of outside air into the furnace.
また１本発明は３本以上の複数本の酸素ランスな使用し
た連続製鋼炉に対しても適用できるものである。この適
用例を第５図に基づいて説明する。第５図は連続製鋼炉
の平面図であって。Furthermore, the present invention can also be applied to a continuous steelmaking furnace using three or more oxygen lances. An example of this application will be explained based on FIG. FIG. 5 is a plan view of a continuous steelmaking furnace.
５本の酸素う／ス２４，２５，２６を使用している場合
であり、そして、それぞれのランス中間位置に塗材投入
口１５を設けたものである。This is a case in which five oxygen lances 24, 25, and 26 are used, and a coating material inlet 15 is provided at an intermediate position between each lance.
また１本発明を、３本以上の酸素ランスな使用した連続
製鋼炉に対して適用する場合、実際の塗材投入口は、冷
却効果を考え、適当な位置の適当数の投入口を選定すれ
ば良い。In addition, when the present invention is applied to a continuous steelmaking furnace that uses three or more oxygen lances, an appropriate number of actual coating material inlets should be selected at appropriate positions, taking into consideration the cooling effect. Good.
本発明は１以上詳記したように、塗材投入口をもランス
の中間位置であって、炉中心に塗材スクラップを投入可
能な位置に設けたものであり、塗材スクラップを連続的
に炉内に投入し、かつランス間の最も高温部に投入する
ものであるから、スクラップが迅速に溶解でき、その結
果、炉内の溶鋼及びスラグな迅速に冷却させることがで
きる。また１本発明は、塗材スクラップの投入量を調整
することによって適当な温度に制御することが可能とな
り、炉本体の耐火材寿命が延び、連続製鋼炉が実用的に
使用可能となる効果が生ずるものである。As described above in detail, the present invention has a coating material inlet in the middle of the lance, at a position where coating material scraps can be fed into the furnace center, and the coating material scraps can be continuously fed into the furnace. Since the scrap is charged into the furnace and into the hottest part between the lances, the scrap can be melted quickly, and as a result, the molten steel and slag in the furnace can be cooled quickly. Furthermore, the present invention makes it possible to control the temperature to an appropriate level by adjusting the amount of coating scrap input, which extends the life of the refractory material in the furnace body, and has the effect of making continuous steelmaking furnaces practically usable. It is something that occurs.
第１図は従来の橋形連続製鋼炉を示す。第２図〜第４図
は２本の酸素ランスを有する連続製鋼炉の断面図であっ
て、この門弟２図は本発明を実施するための１例を示し
、第３図は同じ（他の例を示し、第４図は冷却スクラッ
プの供給手段を例示するものである。第５図は３本の酸
素ランスを有する連続製鋼炉に対して本発明を適用した
場合の平面図を示す。
１・・・炉本体 ２・・・受湯口
３・・・出湯口 ４・・・耐火材
５・・・堰 ６・・・反応槽
７・・・鎮静槽 ８・・・炉蓋
？・・・耐火材 １０・・・排気口
１１・・・造滓剤投入口 １２・・・排滓口１３．１４
．・・・酸素ランス １５・・・塗材投入口１６・・・
溶銑 １７・・・溶鋼
１８・・・造滓剤 １９・・・スラグ
２０・・・純酸素 ２１・・・精錬排ガス２２・・・ス
クラップ ２３・・・ベルトコンベヤ２４．２５．２６
・・・酸素ランス
復代理人 内 １） 明
復代理人 萩 原 亮 −Figure 1 shows a conventional bridge-type continuous steelmaking furnace. Figures 2 to 4 are cross-sectional views of a continuous steelmaking furnace having two oxygen lances, Figure 2 shows one example for carrying out the present invention, and Figure 3 shows the same (other) An example is shown in Fig. 4, which illustrates a cooling scrap supply means. Fig. 5 shows a plan view when the present invention is applied to a continuous steelmaking furnace having three oxygen lances. 1 ... Furnace body 2 ... Inlet 3 ... Outlet 4 ... Refractory material 5 ... Weir 6 ... Reaction tank 7 ... Calming tank 8 ... Furnace lid? ... Refractory material 10...Exhaust port 11...Slag forming agent inlet 12...Slag discharge port 13.14
．． ...Oxygen lance 15...Coating material inlet 16...
Hot metal 17... Molten steel 18... Slag forming agent 19... Slag 20... Pure oxygen 21... Refining exhaust gas 22... Scrap 23... Belt conveyor 24.25.26
...Oxygen lance sub-agent 1) Meifuku agent Ryo Hagiwara -
Claims (1)
ンスの中間位置であって、炉中心に塗材スクラクプを投
入可能な位置に適当数の塗材投入口を設け、この投入口
より塗材スクラップを連続的に投入することを特徴とす
る複数本の酸素ランスを有する連続製鋼炉における塗材
スクラップの供給方法。In a continuous steelmaking furnace having multiple oxygen tanks, an appropriate number of coating material inlets are provided in the middle of each lance at a position where coating material scrap can be introduced into the center of the furnace, and the coating material is injected from these inlets. A method for supplying coating material scrap in a continuous steelmaking furnace having a plurality of oxygen lances, characterized in that material scrap is continuously input.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP58180405A JPS6075510A (en) | 1983-09-30 | 1983-09-30 | Method for supplying coolant scrap in continuous steel making furnace |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP58180405A JPS6075510A (en) | 1983-09-30 | 1983-09-30 | Method for supplying coolant scrap in continuous steel making furnace |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| JPS6075510A true JPS6075510A (en) | 1985-04-27 |
Family
ID=16082666
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP58180405A Pending JPS6075510A (en) | 1983-09-30 | 1983-09-30 | Method for supplying coolant scrap in continuous steel making furnace |
Country Status (1)
| Country | Link |
|---|---|
| JP (1) | JPS6075510A (en) |
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US10510331B2 (en) | 2017-02-17 | 2019-12-17 | S.I.Pan | Sound absorbing structure for anechoic chamber and anechoic chamber including the same |
| US10508828B2 (en) | 2017-02-17 | 2019-12-17 | S.I.Pan | Splitter and sound attenuator including the same |
Citations (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPS4914052A (en) * | 1972-05-16 | 1974-02-07 |
-
1983
- 1983-09-30 JP JP58180405A patent/JPS6075510A/en active Pending
Patent Citations (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPS4914052A (en) * | 1972-05-16 | 1974-02-07 |
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US10510331B2 (en) | 2017-02-17 | 2019-12-17 | S.I.Pan | Sound absorbing structure for anechoic chamber and anechoic chamber including the same |
| US10508828B2 (en) | 2017-02-17 | 2019-12-17 | S.I.Pan | Splitter and sound attenuator including the same |
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