JPS62207808A - Method and apparatus for molten iron pre-treatment - Google Patents
Method and apparatus for molten iron pre-treatmentInfo
- Publication number
- JPS62207808A JPS62207808A JP4959486A JP4959486A JPS62207808A JP S62207808 A JPS62207808 A JP S62207808A JP 4959486 A JP4959486 A JP 4959486A JP 4959486 A JP4959486 A JP 4959486A JP S62207808 A JPS62207808 A JP S62207808A
- Authority
- JP
- Japan
- Prior art keywords
- furnace
- hot metal
- gas
- refining
- flow
- 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
- 238000002203 pretreatment Methods 0.000 title claims description 5
- XEEYBQQBJWHFJM-UHFFFAOYSA-N Iron Chemical compound [Fe] XEEYBQQBJWHFJM-UHFFFAOYSA-N 0.000 title abstract 12
- 229910052742 iron Inorganic materials 0.000 title abstract 6
- 238000000034 method Methods 0.000 title description 7
- 239000007789 gas Substances 0.000 claims abstract description 45
- 238000007670 refining Methods 0.000 claims abstract description 28
- 239000002184 metal Substances 0.000 claims description 43
- 239000003795 chemical substances by application Substances 0.000 claims description 17
- QVGXLLKOCUKJST-UHFFFAOYSA-N atomic oxygen Chemical compound [O] QVGXLLKOCUKJST-UHFFFAOYSA-N 0.000 claims description 11
- 239000001301 oxygen Substances 0.000 claims description 11
- 229910052760 oxygen Inorganic materials 0.000 claims description 11
- 238000011144 upstream manufacturing Methods 0.000 claims description 3
- 239000002893 slag Substances 0.000 abstract description 12
- 238000006243 chemical reaction Methods 0.000 abstract description 5
- 239000000463 material Substances 0.000 abstract 3
- 239000002912 waste gas Substances 0.000 abstract 2
- 238000010276 construction Methods 0.000 abstract 1
- 230000000149 penetrating effect Effects 0.000 abstract 1
- 238000002485 combustion reaction Methods 0.000 description 8
- 238000012545 processing Methods 0.000 description 3
- 238000007796 conventional method Methods 0.000 description 2
- 239000013256 coordination polymer Substances 0.000 description 2
- 238000006477 desulfuration reaction Methods 0.000 description 2
- 230000023556 desulfurization Effects 0.000 description 2
- 230000003009 desulfurizing effect Effects 0.000 description 2
- 230000000694 effects Effects 0.000 description 2
- 238000004880 explosion Methods 0.000 description 2
- 238000007654 immersion Methods 0.000 description 2
- 239000000203 mixture Substances 0.000 description 2
- 239000000126 substance Substances 0.000 description 2
- 229910000831 Steel Inorganic materials 0.000 description 1
- 238000007664 blowing Methods 0.000 description 1
- 239000000567 combustion gas Substances 0.000 description 1
- 238000004891 communication Methods 0.000 description 1
- 238000001816 cooling Methods 0.000 description 1
- 230000007423 decrease Effects 0.000 description 1
- 230000003247 decreasing effect Effects 0.000 description 1
- 238000007598 dipping method Methods 0.000 description 1
- 238000007599 discharging Methods 0.000 description 1
- 239000000428 dust Substances 0.000 description 1
- 239000012535 impurity Substances 0.000 description 1
- 238000007689 inspection Methods 0.000 description 1
- 238000012544 monitoring process Methods 0.000 description 1
- 230000001590 oxidative effect Effects 0.000 description 1
- 239000011819 refractory material Substances 0.000 description 1
- 239000010959 steel Substances 0.000 description 1
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 description 1
Landscapes
- 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】 （産業上の利用分野） 本発明は、溶銑予備処理方法およびその装置に関する。[Detailed description of the invention] (Industrial application field) The present invention relates to a hot metal pretreatment method and apparatus.
特に、本発明は、溶銑が連続的に流れる溝型炉内におい
て、精錬生成ガスを燃焼させてから炉外に排出させる方
法およびその装置に関する。In particular, the present invention relates to a method and apparatus for combusting refining product gas and then discharging it outside the furnace in a trench furnace in which hot metal flows continuously.
（従来の技術）
溶銑の予備処理は、高炉から出銑された溶銑を受は入れ
てから転炉に装入する間に行う脱硫、脱燐あるいは脱硫
などの適宜前処理であって、転炉操業の負担を軽減して
効率的な転炉操業が実現できるために、また高品質の溶
鋼が効率的に生産できるために、今日注目されている。(Prior art) Hot metal pretreatment is appropriate pretreatment such as desulfurization, dephosphorization, or desulfurization that is performed after receiving hot metal tapped from a blast furnace and before charging it into a converter. It is attracting attention today because it can reduce the operational burden and realize efficient converter operation, and because it can efficiently produce high-quality molten steel.
しかしながら、従来、溶銑の連続処理にあっては、反応
炉を形成し、可能な限り密閉化した構造を採用したほう
が、発生する排ガスを少なくし、経済的であると考えら
れてきた。しかし、密閉化した炉から排出された排ガス
は多量の可燃性ガスを含むため、その後湿式で処理する
か、乾式で処理するかは問わず、一旦外部に排出してか
ら燃焼させるのである。特公昭５５−４００８１号およ
び特開昭５２−１０４４１１号参照。However, in the continuous processing of hot metal, it has conventionally been thought that it is more economical to form a reactor and adopt a structure that is as closed as possible to reduce the amount of exhaust gas generated. However, the exhaust gas discharged from a sealed furnace contains a large amount of flammable gas, so regardless of whether it is subsequently treated wet or dry, it is first discharged outside and then burned. See Japanese Patent Publication No. 55-40081 and Japanese Patent Publication No. 52-104411.
その他、簡易処理として、高炉樋中での予備精錬は特開
昭６０−１６２７１５号等に見られるように、何ら排ガ
ス処理を行わない方法も考えられている。In addition, as a simple treatment, a method has been considered in which preliminary refining in a blast furnace trough does not involve any exhaust gas treatment, as seen in JP-A-60-162715.
しかし、このような従来の方式は処理量が少ない場合、
排ガス量も少ないため問題とならないが、今日のように
、処理量および精錬度（不純物除去りが増すと、排ガス
量も増し、何らの処理もしないという訳にもゆかず、ま
た密閉炉を使用していてもＣＯガスが樋蓋の隙間より噴
出したりして、大気中で激しく燃焼することになり、問
題となる。However, when the amount of processing is small, such conventional methods
This is not a problem because the amount of exhaust gas is small, but as it is today, as the amount of treatment and degree of refining (removal of impurities increases, the amount of exhaust gas also increases, so it is not possible to do no treatment at all, and closed furnaces are used. Even if this is done, CO gas may spew out from gaps in the gutter cover and burn violently in the atmosphere, creating a problem.
さらに、集塵器で排ガスを吸引させる場合には、ＣＯガ
スがダクト内で燃焼し、その冷却のために今度は膨大な
量の大気を吸引する必要があり、設備的にも大型化する
ばかりか、ダクト内でのＣＯガス爆発等の危険もある。Furthermore, when exhaust gas is sucked in by a dust collector, CO gas is burned in the duct, and a huge amount of air must be sucked in to cool it, which only increases the size of the equipment. Otherwise, there is a risk of CO gas explosion inside the duct.
（発明が解決しようとする問題点）
ここに、本発明の目的は、上述のような従来技術の問題
を解消した排ガス処理を確立することにより、真に実用
的な溶銑予備処理方法および装置を提供することである
。(Problems to be Solved by the Invention) An object of the present invention is to provide a truly practical hot metal pretreatment method and apparatus by establishing an exhaust gas treatment that eliminates the problems of the prior art as described above. It is to provide.
また、本発明の別の目的は、溶銑予備処理からの排ガス
を、通常の湿式あるいは乾式の処理方法で容易に処理で
きるものとする方法および装置を提供することである。Another object of the present invention is to provide a method and apparatus that allow exhaust gas from hot metal pretreatment to be easily treated using conventional wet or dry treatment methods.
（問題点を解決するための手段）
このような問題を解決すべく、本発明者らは、鋭意検討
を重ねたところ、従来のように、ＣＯガス含有排ガスを
そのま＼排出させることは必ずしも必要ではなく、むし
ろ炉内は熱的にも不足する傾向にあることから燃焼する
ほうがよいことを知り、本発明を完成した。(Means for Solving the Problems) In order to solve these problems, the inventors of the present invention have conducted extensive studies and found that it is not always possible to directly discharge CO gas-containing exhaust gas as in the past. The present invention was completed based on the knowledge that this was not necessary, and that it would be better to use combustion because the inside of the furnace tends to lack heat.
また、炉構造についても、密閉式とする必要はなく、樋
状の精錬炉のうえを例えばカマボッ形の蓋で覆って排ガ
スの燃焼を行うとともに内部を負圧に吸引するだけで、
上述のような従来技術の問題のいくつかが解決されるこ
とを知り、本発明を完成した。Also, regarding the furnace structure, there is no need to make it a closed type; simply cover the top of the gutter-shaped refining furnace with a kamabot-shaped lid to burn the exhaust gas and draw negative pressure inside.
The present invention was completed after realizing that some of the problems of the prior art as described above are solved.
つまり、本発明の要旨とするところは、原料溶銑の流入
部、処理済み溶銑の流出部、およびそれらの間を流れる
溶銑流の上方の、外部雰囲気から区画された上部空間を
備えた溝型炉内において、前記流入部近傍において精錬
剤を溶銑流に投入するとともに、生成するＣＯガスを炉
内の前記上部空間において燃焼させることを特徴とする
、溶銑予備処理方法である。In other words, the gist of the present invention is to provide a channel furnace equipped with an inlet for raw hot metal, an outlet for treated hot metal, and an upper space above the hot metal flow flowing between them, which is separated from the external atmosphere. This hot metal pretreatment method is characterized in that a refining agent is introduced into the hot metal flow near the inlet, and the generated CO gas is combusted in the upper space of the furnace.
また、その別の面からは、本発明は、原料溶銑の流入部
、処理済み溶銑の流出部、およびそれらの間を流れる溶
銑流の上方の、外部雰囲気から区画された上部空間を備
えた溝型炉から構成され、前記上部空間の上流側に精錬
剤の投入手段を設けるとともに、該投入手段の下流にお
いて前記上部空間への酸素含有ガスの投入手段を設けた
ことを特徴とする、溶銑予備処理装置である。In addition, from another aspect, the present invention provides a groove having an upper space separated from the external atmosphere above an inlet for raw hot metal, an outlet for treated hot metal, and a hot metal flow flowing between them. A hot metal reserve comprising a mold furnace, characterized in that a means for charging a refining agent is provided upstream of the upper space, and a means for charging an oxygen-containing gas into the upper space is provided downstream of the charging means. It is a processing device.
なお、上述の酸素含有ガスは代表的には空気であって、
その場合、炉上部にダンパー付空気供給口を設け、この
ダンパーの１１節によって燃焼帯域への酸素量の供給を
関節してもよい。Note that the oxygen-containing gas mentioned above is typically air,
In that case, an air supply port with a damper may be provided in the upper part of the furnace, and the supply of oxygen to the combustion zone may be controlled by the 11 nodes of this damper.
（作用）
ここで、添付図面を参照しながら、本発明についてさら
に説明する。(Operation) The present invention will now be further described with reference to the accompanying drawings.
添付図面は、本発明にかかる溝型炉装置の縦断面図であ
り、図中、原料溶銑１はスキンマー２と浸漬セキ３とか
ら構成される流入部４から炉内に入り、流下する。ただ
し、浸漬セキ３は必ずしも必要ではない０．溶銑流５の
上方は炉構造６によって覆われ、外部雰囲気から区画さ
れており、前記流入部４の近傍には炉壁に設けた小間孔
７を貫いて配置されたノズル８から精錬剤が溶銑流に投
入され、精錬が行われている。符号９は温度センサーを
示す。The accompanying drawing is a longitudinal cross-sectional view of a trench furnace apparatus according to the present invention, and in the drawing, raw hot metal 1 enters the furnace through an inflow section 4 consisting of a skimmer 2 and an immersion pipe 3 and flows down. However, dipping sex 3 is not necessarily necessary. The upper part of the hot metal flow 5 is covered by a furnace structure 6 and is separated from the outside atmosphere, and a refining agent is injected into the hot metal from a nozzle 8 arranged near the inflow part 4 through a small hole 7 provided in the furnace wall. It is being poured into the stream and being refined. Reference numeral 9 indicates a temperature sensor.
ノズル８から投入された脱硫剤、脱燐剤あるいは脱硫剤
などの精錬剤による精錬反応によって生じたＣＯガスを
含む精錬ガスおよびスラグは溶銑内を浮上し、スラグは
場面を覆うようにして浮かび、生成ガスは溶銑流の上方
に設けた上部空間に至り、別に該上部空間に大開孔１０
から供給される酸素含有ガスと混合され、燃焼する。こ
のときの燃焼排ガスは溶銑流の上流、下流に流れ、前記
流入部の上部に設けた煙道１２と後述する流出部１４の
上部に設けた煙道１５とによって吸引、排出される。Refining gas containing CO gas and slag generated by a refining reaction by a refining agent such as a desulfurizing agent, a dephosphorizing agent, or a desulfurizing agent introduced from the nozzle 8 floats in the hot metal, and the slag floats to cover the surface. The generated gas reaches an upper space provided above the hot metal flow, and a large opening 10 is separately provided in the upper space.
It is mixed with oxygen-containing gas supplied from the source and combusted. The combustion exhaust gas at this time flows upstream and downstream of the hot metal flow, and is sucked and discharged by a flue 12 provided above the inflow section and a flue 15 provided above the outflow section 14, which will be described later.
精錬反応の終了した溶銑は、次いでスキンマー１６によ
って構成される流出部１４でスラグと分離され炉外槌部
に流出し、分離されたスラグは排滓口１７より炉外へ排
出される。符号１８は温度センサー、２０は監視窓であ
る。The hot metal that has undergone the refining reaction is then separated from the slag at the outflow section 14 constituted by the skinmer 16 and flows out to the furnace outer mallet section, and the separated slag is discharged from the furnace through the slag discharge port 17. Reference numeral 18 is a temperature sensor, and 20 is a monitoring window.
炉構造６は全体が槌部を覆うように配置されているだけ
で、必要により取り外すことができる。The furnace structure 6 is simply disposed so as to cover the mallet as a whole, and can be removed if necessary.
炉壁側端をそれぞれ樋縁部に載置するようにしてもよい
。本発明の場合、煙道１２．１５で吸引することになる
ため、炉内全体が負圧になって、周囲への排ガスの放出
はない。The furnace wall side ends may be respectively placed on the gutter edges. In the case of the present invention, since suction is carried out through the flue 12.15, the entire interior of the furnace becomes a negative pressure, and no exhaust gas is released to the surroundings.
本発明により、炉内温度の制御を行うには、まず、溶銑
成分と精錬剤添加量とより、ＣＯ発生量を算出し、ＣＯ
ガス燃焼に必要な酸化ガス量を決める。According to the present invention, in order to control the furnace temperature, first, the amount of CO generated is calculated from the hot metal components and the amount of refining agent added, and the amount of CO generated is
Determine the amount of oxidizing gas required for gas combustion.
次いで、この必要量の酸素を、図示例では、大開孔１０
に設けられたダンパー２２を調節しながら炉内に供給す
る。外気の酸素を利用する場合、このダンパー２２は大
気に連絡している。このとき炉内雰囲気温度（排ガスの
煙道からの導出直前の温度が良い）を測定し、常に燃焼
が良好に行われているかを測定する。This required amount of oxygen is then introduced into the large aperture 10 in the illustrated example.
It is supplied into the furnace while adjusting the damper 22 provided in the. When using outside air oxygen, this damper 22 is in communication with the atmosphere. At this time, the temperature of the atmosphere in the furnace (preferably the temperature immediately before the exhaust gas is discharged from the flue) is measured to determine whether combustion is being performed well at all times.
なお、酸素量は常に過剰気味で外部から導入し、炉内温
度が低下するとダンパーを絞り、酸素量を少なくし、一
方、炉内温度が上ると導入を増すようにして制御を行う
。Note that the amount of oxygen is always introduced from the outside in a slightly excessive amount, and when the temperature inside the furnace decreases, the damper is throttled to reduce the amount of oxygen, while when the temperature inside the furnace rises, the amount of oxygen introduced is controlled to be increased.
水冷壁を採用している炉の場合２０００℃前後、通常耐
火物の場合は１６００℃前後が炉内雰囲気温度の目安で
あるが、連続精錬の安定処理のためには発生するスラグ
の流動性を保つため少なくとも１４００℃以上の領域で
反応炉内の温度が維持される必要がある。したがって、
１４００℃以上の温度であって、炉の構造に応じた特定
温度域で制御される。比較的炉温度が高く設定できる場
合は、燃焼熱を溶銑に付加することができ、この場合に
は熱効率を上げるため酸素を含む含熱燃焼用ガスの導入
が可能である。The approximate temperature of the atmosphere inside the furnace is around 2,000℃ for a furnace that uses water-cooled walls, and around 1,600℃ for ordinary refractories. In order to maintain this temperature, it is necessary to maintain the temperature inside the reactor in a range of at least 1400°C or higher. therefore,
The temperature is 1400°C or higher, and is controlled in a specific temperature range depending on the structure of the furnace. If the furnace temperature can be set relatively high, combustion heat can be added to the hot metal, and in this case, a heat-containing combustion gas containing oxygen can be introduced to increase thermal efficiency.
反応炉の温度が上がりすぎた場合の制御手段としては、
外気導入量の制御の他、６剤による制御も採用できる。As a control method when the reactor temperature rises too much,
In addition to controlling the amount of outside air introduced, control using six agents can also be adopted.
次に、本発明を実施例によってさらに具体的に説明する
。Next, the present invention will be explained in more detail with reference to Examples.
実施例１
添付図面に示す装置を使い溶銑流７ Ｔｏｎ／ｍｉｎに
対し、精錬剤（ＣａＯ：４５％、Ｆｅ１０３：５０％、
ＣａＦ：５％）を３５０ ｋｇ／ｗｉｎの割合でプラス
ディングにより吹込み予備脱燐を行なった。Example 1 Refining agents (CaO: 45%, Fe103: 50%,
Preliminary dephosphorization was carried out by blowing CaF: 5%) at a rate of 350 kg/win.
このときの溶銑の化学組成の変化を第１表に示す。Table 1 shows the changes in the chemical composition of the hot metal at this time.
本例では、炉内雰囲気温度を２０００℃で制御すること
を目標に操業を行なうた。In this example, the operation was carried out with the aim of controlling the furnace atmosphere temperature at 2000°C.
生成ＣＯガスｆｌ：
Ｑ、。−７０００ｋｇＸ （０，０４５−０，０４３）
ｘ１２ １．２５
必要燃焼空気量：
２ ０．１８
上記のダンパー付大開孔（直径５００ｍｎ＋）と周囲に
直径１００ＩＩＩＩ１１の開孔（点検孔）を５ケ所に設
けた。Generated CO gas fl: Q,. -7000kgX (0,045-0,043)
x12 1.25 Required amount of combustion air: 2 0.18 Five holes (inspection holes) with a diameter of 100III11 were provided around the large hole (diameter 500 mm+) with the damper described above.
排ガス煙道前での温度計により、炉内雰囲気が２０００
℃となるようにダンパー制御を行い炉内燃焼を行なった
。A thermometer in front of the exhaust gas flue indicates that the atmosphere inside the furnace is 2000℃.
Combustion was performed in the furnace by controlling the damper so that the temperature was ℃.
この結果、スラグ中の金属Ｆｅ量が、０．７％から０．
３％に低下した。溶銑温度は従来に比べ０．３％程向上
した。As a result, the amount of metallic Fe in the slag decreased from 0.7% to 0.7%.
It dropped to 3%. The temperature of hot metal was improved by about 0.3% compared to the conventional method.
なお、精錬剤原単位（精錬剤の量／除去されたＣＰ）の
量）が９％程改善されたが、これはスラグの温度が上が
り、滓化性が向上した結果と思われる。Note that the refining agent consumption rate (amount of refining agent/amount of removed CP) was improved by about 9%, which is thought to be the result of an increase in the temperature of the slag and improved slagability.
実施例２
実施例１と同様にして溶銑流５ Ｔｏｎ／ｍｉｎに対し
、Ｎａ２ＣＯｚ ＝ １００ ｋｇ／１ＩｌｉｎとＦｅ
ｚＯ５＝１００ ｋｇ／Ｉｗｉｎとをプラスディングし
、予備脱燐処理を行なった。Example 2 In the same manner as in Example 1, for a hot metal flow of 5 Ton/min, Na2COz = 100 kg/1Ilin and Fe
zO5=100 kg/Iwin was added to perform preliminary dephosphorization treatment.
このときの溶銑化学組成の変化を第２表に示す。Table 2 shows the changes in the chemical composition of the hot metal at this time.
第２表
（重量％）
本例では、炉内雰囲気温度は１８００℃で制御すること
を目標に操業を行なった。Table 2 (% by weight) In this example, the operation was carried out with the aim of controlling the furnace atmosphere temperature at 1800°C.
まず、次の量を計算により求めた。First, the following quantities were calculated.
生成ＣＯガスＷｋ：
１２ １．２５
１０６ １．２５
この結果、本発明によれば、精錬剤原単位が１０％改善
され、溶銑温度は０．７％向上した。Generated CO gas Wk: 12 1.25 106 1.25 As a result, according to the present invention, the refining agent consumption rate was improved by 10%, and the hot metal temperature was improved by 0.7%.
（発明の効果）
以上、本発明を説明してきたが、排ガス処理が容易とな
る利益の他に、本発明によれば次のような効果がみられ
る。(Effects of the Invention) The present invention has been described above, and in addition to the benefit of facilitating exhaust gas treatment, the present invention also provides the following effects.
■精錬後のスラグ温度を高く維持することができ、流動
性がよく、排滓時のトラブルが少なくできる。■It is possible to maintain a high slag temperature after refining, has good fluidity, and reduces troubles during slag discharge.
■そのため、精錬スラグと溶銑間の反応が進み、結果的
に精錬剤原単位を低くできる。■As a result, the reaction between the refining slag and hot metal progresses, and as a result, the unit consumption of refining agents can be lowered.
■排ガス処理時に、ＣＯガス爆発の危険性が無くなる。■ Eliminates the risk of CO gas explosion during exhaust gas treatment.
■排ガス処理時に、ＣＯ□リッチのため、処理が容易、
排ガス中にＮａｇＯ含有水をスプレーすると、ガス冷却
と同時にＮａｔＣＯｓが生成できる。■During exhaust gas treatment, it is easy to process because it is CO□ rich.
When NagO-containing water is sprayed into the exhaust gas, NatCOs can be generated simultaneously with gas cooling.
なお、ＣＯガス中ではこの反応は起こらない。Note that this reaction does not occur in CO gas.
■溶銑温度が上ることより、より多くの精錬剤を添加で
き、終点ＣＰ）ｔ！度をさらに低減可能である。■As the hot metal temperature rises, more refining agents can be added, and the end point CP)t! It is possible to further reduce the degree of
添付図面は、本発明の装置の略式縦断面図である。
１：原料溶銑 ２ニスキンマー３：浸漬セキ
４：流入部
５：溶銑流 ６：炉構造
７：小開孔 ８：ノズル
９：温度センサー １０：大開孔１２：煙道
１４：流出部１５：煙道The accompanying drawing is a schematic longitudinal section through the device of the invention. 1: Raw hot metal 2 Niskinmer 3: Immersion pipe 4: Inflow section 5: Hot metal flow 6: Furnace structure 7: Small opening 8: Nozzle 9: Temperature sensor 10: Large opening 12: Flue
14: Outflow part 15: Flue
Claims (2)
びそれらの間を流れる溶銑流の上方の、外部雰囲気から
区画された上部空間を備えた溝型炉内において、前記流
入部近傍において精錬剤を溶銑流に投入するとともに、
生成するＣＯガスを炉内の前記上部空間において燃焼さ
せることを特徴とする、溶銑予備処理方法。(1) In a trench furnace equipped with an inlet for raw hot metal, an outlet for treated hot metal, and an upper space separated from the external atmosphere above the hot metal flow flowing between them, in the vicinity of the inlet. Injecting the refining agent into the hot metal flow,
A hot metal pretreatment method characterized in that the generated CO gas is combusted in the upper space in the furnace.
びそれらの間を流れる溶銑流の上方の、外部雰囲気から
区画された上部空間を備えた溝型炉から構成され、前記
上部空間の上流側に精錬剤の投入手段を設けるとともに
、該投入手段の下流において前記上部空間への酸素含有
ガスの投入手段を設けたことを特徴とする、溶銑予備処
理装置。(2) Consisting of a channel-type furnace equipped with an inlet for raw hot metal, an outlet for treated hot metal, and an upper space separated from the external atmosphere above the hot metal flow flowing between them, the upper space is A hot metal pretreatment apparatus, characterized in that a means for charging a refining agent is provided on an upstream side, and a means for charging an oxygen-containing gas into the upper space is provided downstream of the charging means.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP4959486A JPS62207808A (en) | 1986-03-07 | 1986-03-07 | Method and apparatus for molten iron pre-treatment |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP4959486A JPS62207808A (en) | 1986-03-07 | 1986-03-07 | Method and apparatus for molten iron pre-treatment |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| JPS62207808A true JPS62207808A (en) | 1987-09-12 |
Family
ID=12835562
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP4959486A Pending JPS62207808A (en) | 1986-03-07 | 1986-03-07 | Method and apparatus for molten iron pre-treatment |
Country Status (1)
| Country | Link |
|---|---|
| JP (1) | JPS62207808A (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JP2012229486A (en) * | 2011-04-13 | 2012-11-22 | Jfe Steel Corp | Method for producing molten steel |
Citations (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPS52104411A (en) * | 1976-02-28 | 1977-09-01 | Mitsubishi Heavy Ind Ltd | Continuous oxygen refining furnace of steel |
| JPS5540081A (en) * | 1978-09-18 | 1980-03-21 | Nippon Steel Corp | Rolling mill |
| JPS5727388A (en) * | 1980-07-24 | 1982-02-13 | Fuji Electric Co Ltd | Warehouse interior ventilation switching mechanism for automatic vending machine |
-
1986
- 1986-03-07 JP JP4959486A patent/JPS62207808A/en active Pending
Patent Citations (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPS52104411A (en) * | 1976-02-28 | 1977-09-01 | Mitsubishi Heavy Ind Ltd | Continuous oxygen refining furnace of steel |
| JPS5540081A (en) * | 1978-09-18 | 1980-03-21 | Nippon Steel Corp | Rolling mill |
| JPS5727388A (en) * | 1980-07-24 | 1982-02-13 | Fuji Electric Co Ltd | Warehouse interior ventilation switching mechanism for automatic vending machine |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JP2012229486A (en) * | 2011-04-13 | 2012-11-22 | Jfe Steel Corp | Method for producing molten steel |
Similar Documents
| Publication | Publication Date | Title |
|---|---|---|
| GB2121829A (en) | Continuous steelmaking and casting | |
| US3972708A (en) | Process for avoiding formation of smoke and flames in bottom blown converters | |
| US2862810A (en) | Process and apparatus for reducing the silicon content and increasing the temperature of molten pig iron | |
| JP2602573B2 (en) | Metal refining method | |
| JPS62207808A (en) | Method and apparatus for molten iron pre-treatment | |
| WO1997008348A1 (en) | Process for vacuum refining of molten steel and apparatus therefor | |
| JP2006249569A (en) | Method for producing molten iron having low phosphorus | |
| US3236630A (en) | Oxygen steelmaking | |
| CN110592392B (en) | System and method for treating ring-collecting flue gas in copper smelting process | |
| JPH0233779B2 (en) | ||
| KR101511178B1 (en) | Method for the pyrometallurigical treatment of metals, molten metals, and/or slags | |
| US4045212A (en) | Method of operation of a cupola | |
| US2958597A (en) | Manufacture of steel | |
| US3224750A (en) | Recovery of combustible gases in ferro-metallurgical processes | |
| US4341553A (en) | Method of, and cupola furnace for, the introduction of treatment agents into cupola iron melts | |
| US2752235A (en) | Method and apparatus for making steel | |
| JPS6035408B2 (en) | Continuous processing method and equipment for hot metal | |
| US3747909A (en) | Charging aisle exhaust system | |
| JP3272372B2 (en) | Tank heating method and apparatus for vacuum degassing tank | |
| RU2017829C1 (en) | Ferrous metals molten bath purification method | |
| SU1148873A1 (en) | Method of steel melting in double-bath furnaces | |
| JP3121894B2 (en) | Metal melting furnace | |
| JPS5839884B2 (en) | Alkali Calendar Plants | |
| JPH06147777A (en) | Exhaust gas cooling equipment for ladle refining | |
| RU2061056C1 (en) | Equipment to melt metal scrap and for off-the furnace processing of molten metal by blow of gases |