JP2600733B2 - Smelting reduction method - Google Patents
Smelting reduction methodInfo
- Publication number
- JP2600733B2 JP2600733B2 JP62322322A JP32232287A JP2600733B2 JP 2600733 B2 JP2600733 B2 JP 2600733B2 JP 62322322 A JP62322322 A JP 62322322A JP 32232287 A JP32232287 A JP 32232287A JP 2600733 B2 JP2600733 B2 JP 2600733B2
- Authority
- JP
- Japan
- Prior art keywords
- furnace
- reduction
- smelting
- preheating
- iron ore
- 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 - Fee Related
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Description
【発明の詳細な説明】 ［産業上の利用分野］ この発明は炭材を燃料および還元材として用い、鉄鉱
石を転炉型製錬炉内において溶融状態で還元する溶融還
元法に関する。Description: TECHNICAL FIELD The present invention relates to a smelting reduction method for reducing iron ore in a molten state in a converter type smelting furnace using a carbonaceous material as a fuel and a reducing agent.
［従来の技術］ 溶融還元法は、高炉製銑法に変わるものであり、高炉
製銑法においては高炉の建設費が高く、広大な敷地が必
要であるという高炉製銑法の欠点を解消すべく、近年に
至り開発されたものである。[Prior art] The smelting reduction method is an alternative to the blast furnace iron making method, and eliminates the disadvantages of the blast furnace iron making method, which requires a large blast furnace construction cost and a vast site. Therefore, it has been developed in recent years.
この還元法においては、鉄鉱石は製錬炉からの排出ガ
スで予備還元され、炭材、造滓剤とともに製錬炉内に装
入され、また酸素ガスまたは撹拌用ガスが前記製錬炉内
に吹き込まれる。そうすると炭材が、予め装入されてあ
る溶銑に溶解するとともに、炭材のＣが酸素ガスによっ
て酸化される。このときの酸化熱によって鉱石が溶融さ
れるとともに、鉱石が炭材中のＣによって還元される。
溶銑から発生するCOガスは過剰に吹き込まれる酸素ガス
により２次燃焼されてCO2ガスになる。このCO2ガスの顕
熱は、溶銑上を覆っているスラグ及びフオーミング状の
粒鉄に伝達され、次いで溶銑に伝達される。In this reduction method, iron ore is preliminarily reduced with exhaust gas from a smelting furnace, charged into a smelting furnace together with carbonaceous material and slag-making agent, and oxygen gas or a gas for stirring is supplied into the smelting furnace. Is blown into Then, the carbon material is dissolved in the hot metal charged in advance, and C of the carbon material is oxidized by the oxygen gas. The ore is melted by the heat of oxidation at this time, and the ore is reduced by C in the carbonaceous material.
The CO gas generated from the hot metal is secondarily combusted by the oxygen gas blown excessively to become CO 2 gas. The sensible heat of the CO 2 gas is transferred to the slag and forming granular iron covering the hot metal, and then to the hot metal.
こうして鉄鉱石が還元されて溶銑が製造されるが、製
錬炉における鉄鉱石の還元工程を軽減するため、製錬炉
に装入される前の鉄鉱石の予備還元率を60％乃至75％と
し、従って製錬炉の排出ガスは還元性の高い低酸化度の
ガスを多量に使用している。（例えば特公昭61−4340
6） ［発明が解決しようとする問題点］ しかしながら、予備還元率を30％以上にする場合に
は、製錬炉の排出ガスの酸化度、［（H2O＋CO2）／（H2
＋H2O＋CO＋CO2）、以下これを単にODという］を下げる
必要がある。こうすると前記排出ガス量は必然的に増加
することになり、前記製錬炉の発生エネルギーは1Gcal/
T（溶銑）を大きく超えることになり、製造所内のエネ
ルギーバランス上、発生エネルギーが過剰となる。この
ことは当然製造コストの増大につながる。In this way, iron ore is reduced to produce hot metal. To reduce the iron ore reduction process in the smelting furnace, the pre-reduction rate of iron ore before being charged into the smelting furnace is 60% to 75%. Therefore, the exhaust gas of the smelting furnace uses a large amount of a low-oxidation gas having high reducibility. (For example, Japanese Patent Publication No. 61-4340
6) [Problems to be Solved by the Invention] However, when the pre-reduction rate is set to 30% or more, the oxidation degree of the exhaust gas of the smelting furnace is calculated as follows: [(H 2 O + CO 2 ) / (H 2
+ H 2 O + CO + CO 2 ), hereinafter simply referred to as OD]. In this case, the amount of exhaust gas necessarily increases, and the energy generated by the smelting furnace is 1 Gcal /
This greatly exceeds T (hot metal), and the generated energy is excessive due to the energy balance in the factory. This naturally leads to an increase in manufacturing costs.
また、高い予備還元率を得るためには上記の通りODの
低い前記排出ガスを必要とし、かつ鉄鉱石の予備還元炉
内の滞留時間を長くすることになって、予備還元された
鉄鉱石の製錬炉内への装入と製造される溶銑の出湯サイ
クルとのバランスを取ることが難しい。このことは必然
的に製錬炉の操業の自由度を大きく制限する。Further, in order to obtain a high pre-reduction rate, the exhaust gas having a low OD is required as described above, and the residence time of the iron ore in the pre-reduction furnace is lengthened. It is difficult to balance the charging into the smelting furnace with the tapping cycle of the hot metal to be produced. This inevitably limits the degree of freedom of operation of the smelting furnace.
この発明は、かかる問題点を解決するためになされた
ものであって、前記製錬炉からの発生エネルギーを抑え
製鉄所全体のエネルギー効率を向上させるとともに操業
性の良好な溶融還元法を提供しようとするものである。The present invention has been made in order to solve such a problem, and it is an object of the present invention to provide a smelting reduction method which suppresses the energy generated from the smelting furnace, improves the energy efficiency of the entire steelworks, and has good operability. It is assumed that.
［問題点を解決するための手段及び作用］ この発明による溶融還元法は、予熱予備還元炉で予
熱、予備還元された鉄鉱石を予熱予備還元炉から製錬炉
に直接装入するとともに、炭材と造滓剤とを製錬炉に装
入し、脱炭用及び２次燃焼用ノズルを有する上吹き酸素
ランスから酸素を製錬炉に吹き込み、同時に、製錬炉の
側壁及び炉底に設けられた羽口から撹拌用ガスを吹き込
んで鉄鉱石を溶融還元する方法であって、前記製錬炉で
生成され予熱予備還元炉に導入されるガスの温度を300
乃至800℃、前記製錬炉で生成するガスの酸化度〔（H2O
＋CO2）／（H2＋H2O＋CO＋CO2）〕を0.4乃至0.6、予熱
予備還元炉での予備還元率を30％以下とすることを特徴
とする。[Means and Actions for Solving the Problems] In the smelting reduction method according to the present invention, iron ore preheated and pre-reduced in the preheating pre-reduction furnace is directly charged from the pre-heating pre-reduction furnace to the smelting furnace, The material and the slag-making agent are charged into the smelting furnace, and oxygen is blown into the smelting furnace from a top-blown oxygen lance having decarburizing and secondary combustion nozzles, and simultaneously, is injected into the side wall and the furnace bottom of the smelting furnace. It is a method of melting and reducing iron ore by blowing a stirring gas from a provided tuyere, wherein the temperature of the gas generated in the smelting furnace and introduced into the preheating pre-reduction furnace is 300.
To 800 ° C., the degree of oxidation of gas generated in the smelting furnace [(H 2 O
+ CO 2 ) / (H 2 + H 2 O + CO + CO 2 )] is set to 0.4 to 0.6, and the pre-reduction rate in the pre-heating pre-reduction furnace is set to 30% or less.
予熱予備還元炉に導入される製錬炉からの排出ガスの
温度は300℃乃至800℃と高くされてあるので予熱効果を
十分期待することが出来、また前記排ガスのODは0.4乃
至0.6に調整されてあるので鉄鉱石の予熱予備還元炉に
おける予備還元率は高くても30％以下とすることが出来
る。また前記製錬炉内で酸素ランスからの吹込酸素でCO
ガスの２次燃焼を十分におこなって、ODを0.4乃至0.6に
高めるとともに製錬炉の側壁および炉底から撹拌ガスを
吹き込んでスラグ層及び鉄浴を十分撹拌させ、前記２次
燃焼による顕熱を前記スラグ層及び鉄浴に伝達し着熱効
率（２次燃焼により発生した顕熱が鉄浴に伝達される割
合）を向上させる。こうすると、前記製錬炉からの発生
エネルギーは製造される溶銑トン当り1Gcal程度に抑え
られ、製鉄所のプロセス全体のエネルギー効率が向上す
る。また上記のように予備還元率を高くしていないの
で、予熱予備還元炉に鉄鉱石が滞留する時間は短かくな
り、前述の製錬炉の出湯サイクルとの問題は解決され、
操業の自由度は確保される。The temperature of the exhaust gas from the smelting furnace introduced into the preheating pre-reduction furnace has been raised to 300 ° C to 800 ° C, so that a sufficient preheating effect can be expected, and the OD of the exhaust gas is adjusted to 0.4 to 0.6. Therefore, the pre-reduction rate of the iron ore in the pre-heating pre-reduction furnace can be at most 30% or less. In the smelting furnace, CO
The secondary combustion of the gas is sufficiently performed to increase the OD to 0.4 to 0.6, and the slag layer and the iron bath are sufficiently stirred by blowing the stirring gas from the side wall and the bottom of the smelting furnace. Is transferred to the slag layer and the iron bath to improve the heat transfer efficiency (the rate at which sensible heat generated by the secondary combustion is transferred to the iron bath). In this way, the energy generated from the smelting furnace is suppressed to about 1 Gcal per ton of hot metal to be produced, and the energy efficiency of the entire process at the steel mill is improved. In addition, since the pre-reduction rate is not increased as described above, the time during which the iron ore stays in the pre-heating pre-reduction furnace is shortened, and the above-mentioned problem with the tapping cycle of the smelting furnace is solved.
Operational flexibility is secured.
［実施例］ 本発明の実施例を添付の図面を参照しながら説明す
る。第１図は本発明の溶融還元法に用いられるプロセス
の説明図である。製錬炉10内には鉄浴11及びスラグ層12
が形成され、副原料である石炭及び造滓剤が装入される
第１のシュート13が前記製錬炉炉の上部に設けられてお
り、また酸素を吹き込む酸素ランス21が炉内に鉛直に挿
入されている。前記ランスには脱炭用酸素及び２次燃焼
用酸素を噴出するノズル22、23が夫々設けられ、更にラ
ンス先端の中心には主に炭材または石炭等の副原料を吹
き込むノズル24が設けられている。Embodiment An embodiment of the present invention will be described with reference to the accompanying drawings. FIG. 1 is an explanatory view of a process used in the smelting reduction method of the present invention. Inside the smelting furnace 10, there is an iron bath 11 and a slag layer 12.
Is formed, and a first chute 13 into which coal and slag forming agent as auxiliary materials are charged is provided at the upper part of the smelting furnace, and an oxygen lance 21 for blowing oxygen is vertically provided in the furnace. Has been inserted. The lance is provided with nozzles 22 and 23 for ejecting oxygen for decarburization and oxygen for secondary combustion, respectively, and a nozzle 24 is provided at the center of the tip of the lance for mainly injecting auxiliary material such as carbon material or coal. ing.
前記炉の上方には流動層型の反応装置である予熱予備
還元炉30が設けられ、これに第２のシュート31から鉄鉱
石が供給され、ここで予熱、予備還元された鉄鉱石は第
３のシュート32から前記製錬炉10に挿入される。予熱予
備還元炉30に製錬炉10の発生ガスを供給する導管33が設
けられている。また、予熱予備還元炉30の排ガスからダ
ストを除去するホットサイクロン34、予熱予備還元炉30
の排出ガスの顕熱を利用して蒸気を得る熱交換器35が予
熱予備還元炉の下流側に設けられている。さらに、前記
製錬炉10の側壁及び炉底には撹拌用のガスを吹き込む羽
口25、26が夫々設けられている。Above the furnace, a preheating pre-reduction furnace 30, which is a fluidized bed type reactor, is provided, to which iron ore is supplied from a second chute 31, where the preheated and pre-reduced iron ore is converted to a third ore. Is inserted into the smelting furnace 10 from the chute 32. A conduit 33 that supplies gas generated in the smelting furnace 10 to the preheating pre-reduction furnace 30 is provided. Also, a hot cyclone 34 for removing dust from the exhaust gas of the preheating pre-reduction furnace 30,
A heat exchanger 35 that obtains steam by using the sensible heat of the exhaust gas is provided downstream of the preheating pre-reduction furnace. Further, tuyeres 25 and 26 for blowing gas for stirring are provided on the side wall and the bottom of the smelting furnace 10, respectively.
なお、原料事情、設備費用、操業の容易性等を考慮し
て予熱予備還元炉として、熱効率の良いシャフト炉型も
しくは設備費用が低減され、また操業が容易であるロー
タリキルン型のものを設けることは本発明の実施にあた
って全く支障はない。In consideration of the raw material situation, equipment cost, easiness of operation, etc., a shaft furnace type with good thermal efficiency or a rotary kiln type with low equipment cost and easy operation should be provided as a preheating pre-reduction furnace. Does not hinder the practice of the present invention.
以上のように構成された本発明の方法に用いる溶融還
元装置の作用について説明する。原料である鉄鉱石は第
２のシュート31から予熱予備還元炉30に挿入されここで
製錬炉10から導管33を通して発生ガスの供給を受けて予
熱および還元された後、製錬炉10に第３のシュート32を
通して装入される。副原料である石炭、造滓剤は装入装
置が簡便である通常のホッパー（図示せず）から第１の
シュート13を通して製錬炉10内に装入される外、必要に
応じて上記酸素ランスに設けたノズル24から粉状として
装入することも可能である。The operation of the smelting reduction apparatus configured as described above and used in the method of the present invention will be described. Iron ore, which is a raw material, is inserted from a second chute 31 into a preheating pre-reduction furnace 30, where it is supplied with a generated gas from a smelting furnace 10 through a conduit 33 to be preheated and reduced. Charged through the third chute 32. Coal and slag-making agent as auxiliary raw materials are charged into the smelting furnace 10 through the first chute 13 from a normal hopper (not shown) having a simple charging device. It is also possible to charge the powder from a nozzle 24 provided in the lance.
上記のように製錬炉に装入された原料及び副原料は製
錬炉の側壁及び炉底に設けられた羽口25、26から吹き込
まれる撹拌用ガスによって、既に炉内に形成されている
鉄浴およびスラグ層とともに十分撹拌される。この攪拌
用ガスはAr、N2等の不活性ガス及び前記予熱予備還元炉
からの排ガスが用いられる。一方前記酸素ランス21の脱
炭用及び２次燃焼用ノズル22、23から供給される酸素は
前記炭材を酸化させて原料である鉄鉱石を還元するのに
十分な熱源を供給する。また、予熱予備還元炉30からの
排ガスはホットサイクロン34でダストが除去された後、
蒸気発生器35で熱交換されて系外に排出されるが、必要
に応じて切り換え弁36により製錬炉10の撹拌用ガスとし
て利用される。なお、前記蒸気発生器35に代えて鉄鉱石
予熱装置を設け、予熱予備還元炉30の排ガスの顕熱を利
用することも可能である。The raw materials and auxiliary raw materials charged into the smelting furnace as described above are already formed in the furnace by the stirring gas blown from the tuyeres 25 and 26 provided on the side walls and the bottom of the smelting furnace. Stir well with iron bath and slag layer. The stirring gas Ar, the exhaust gas from the inert gas and the preheating preliminary reducing furnace such as N 2 is used. On the other hand, oxygen supplied from the decarburizing and secondary combustion nozzles 22 and 23 of the oxygen lance 21 supplies a heat source sufficient to oxidize the carbon material and reduce iron ore as a raw material. Also, the exhaust gas from the preheating pre-reduction furnace 30 is subjected to dust removal by the hot cyclone 34,
The heat is exchanged by the steam generator 35 and discharged out of the system. However, the gas is used as a stirring gas of the smelting furnace 10 by the switching valve 36 as necessary. It is also possible to provide an iron ore preheating device in place of the steam generator 35 and use the sensible heat of the exhaust gas of the preheating pre-reduction furnace 30.
本発明の特徴は上記製錬炉の排ガスの酸化度ODを0.4
乃至0.6、その温度を300乃至800℃、第１図の溶融還元
装置における鉄鉱石の予備還元率を０乃至30％とするこ
とを特徴とするものであるが、以下にその理由を説明す
る。The feature of the present invention is that the oxidation degree OD of the exhaust gas from the smelting furnace is 0.4
1 to 0.6, the temperature is 300 to 800 ° C., and the preliminary reduction rate of iron ore in the smelting reduction apparatus shown in FIG. 1 is 0 to 30%. The reason will be described below.
第２図は前記酸化度ODと第１図の溶融還元装置から発
生する余剰エネルギーとの関係を示したグラフ図であ
る。第２図の図中、斜線で示した範囲が製鉄所全体のエ
ネルギーバランスを考えたときの適正な余剰エネルギー
の範囲である。この図は前記溶融還元装置について検討
した結果得られたもので、これによればODが0.4より小
さい場合は余剰エネルギー多過ぎて無駄なエネルギーが
発生すことにするになり、ODが0.6より大きい場合は余
剰エネルギーは少な過ぎて製鉄所のエネルギーは不足す
る。このことは第２図に示されているように前記予備還
元率を30％以下としたときに達成されるのであって、こ
れを30％より多くすることは前述の通り鉄鉱石の予熱予
備還元炉の滞留時間が長くなり、溶融還元装置の操業の
自由度が大きく制限されることになる。FIG. 2 is a graph showing the relationship between the degree of oxidation OD and the surplus energy generated from the smelting reduction apparatus of FIG. In FIG. 2, the range shown by hatching is a range of appropriate surplus energy when considering the energy balance of the entire steelworks. This figure was obtained as a result of examining the smelting reduction apparatus.According to this figure, when OD is smaller than 0.4, excess energy is excessive and wasteful energy is generated, and OD is larger than 0.6. In this case, the surplus energy is too small and the energy of the steelworks is insufficient. This is achieved when the pre-reduction rate is set to 30% or less as shown in FIG. 2, and when the pre-reduction rate is more than 30%, the pre-heating pre-reduction The residence time of the furnace is prolonged, and the degree of freedom of operation of the smelting reduction apparatus is greatly restricted.
次に本実施例にもとずく具体的数値を挙げる。炭材と
して石炭を1124kg/THM（製造される溶銑トン当り、以下
同じ）、酸素を798Nm3/THM、使用してODが0.4、着熱効
率は70％であった。Next, specific numerical values based on this embodiment will be described. As the carbonaceous material, coal was 1124 kg / THM (per ton of hot metal to be produced, the same applies hereinafter), oxygen was 798 Nm 3 / THM, the OD was 0.4, and the heat transfer efficiency was 70%.
［発明の効果］ 本発明によれば酸素ランスに設けた２次燃焼用ノズル
からの酸素によるCOガスの燃焼及び製錬炉の炉壁及び炉
底に設けた羽口からの吹き込を行って、製錬炉の発生ガ
スの酸化度を0.4乃至0.6、前記ガスの温度を300乃至800
℃、予備還元率を30％以下とするので、溶融還元装置の
余剰エネルギーを製鉄所全体のエネルギバランスに見合
った適正なものとなり、また予熱予備還元炉の負担が軽
くされてあるので製錬炉との工程の調整の必要が無くな
り操業の自由度が大幅に固状される。[Effects of the Invention] According to the present invention, combustion of CO gas by oxygen from a secondary combustion nozzle provided in an oxygen lance and blowing from tuyeres provided on a furnace wall and a furnace bottom of a smelting furnace are performed. The oxidation degree of the gas generated in the smelting furnace is 0.4 to 0.6, and the temperature of the gas is 300 to 800.
℃, the pre-reduction rate is 30% or less, so that the excess energy of the smelting reduction equipment is appropriate for the energy balance of the entire steelworks, and the load on the pre-heating pre-reduction furnace is reduced, so the smelting furnace There is no need to adjust the process, and the degree of freedom of operation is greatly fixed.
第１図は本発明の溶融還元法に用いられるプロセスの説
明図、第２図は本発明による排ガスの酸化度ODと余剰エ
ネルギーとの関係を示すグラフ図である。 10……製錬炉、11……鉄浴、12……スラグ層、13……第
１のシュート、21……酸素ランス、22、23、24……ノズ
ル、25、26……羽口、30……予熱予備還元炉、31……第
２のシュート、32……第３のシュート、33……導管、34
……ホットサイクロン、35……蒸気発生器。FIG. 1 is an explanatory view of a process used in the smelting reduction method of the present invention, and FIG. 2 is a graph showing the relationship between the degree of oxidation OD of exhaust gas and excess energy according to the present invention. 10 ... smelting furnace, 11 ... iron bath, 12 ... slag layer, 13 ... first chute, 21 ... oxygen lance, 22, 23, 24 ... nozzle, 25, 26 ... tuyere, 30 ... preheating pre-reduction furnace, 31 ... second chute, 32 ... third chute, 33 ... conduit, 34
…… Hot cyclone, 35 …… Steam generator.
───────────────────────────────────────────────────── フロントページの続き (72)発明者 川上 正弘 東京都千代田区丸の内１丁目１番２号 日本鋼管株式会社内 (72)発明者 寺田 修 東京都千代田区丸の内１丁目１番２号 日本鋼管株式会社内 審査官 津野 孝 (56)参考文献 特開 昭61−64807（ＪＰ，Ａ) 特開 平１−162710（ＪＰ，Ａ) ────────────────────────────────────────────────── ─── Continuing on the front page (72) Inventor Masahiro Kawakami 1-2-1, Marunouchi, Chiyoda-ku, Tokyo Inside Nippon Kokan Co., Ltd. (72) Inventor Osamu Terada 1-1-2, Marunouchi, Chiyoda-ku, Tokyo Nippon Kokan Examiner Takashi Tsuno, Inc. (56) References JP-A-61-64807 (JP, A) JP-A-1-162710 (JP, A)
Claims (7)
鉱石を予熱予備還元炉から製錬炉に直接装入するととも
に、炭材と造滓剤とを製錬炉に装入し、脱炭用及び２次
燃焼用ノズルを有する上吹き酸素ランスから酸素を製錬
炉に吹き込み、同時に、製錬炉の側壁及び炉底に設けら
れた羽口から撹拌用ガスを吹き込んで鉄鉱石を溶融還元
する方法であって、前記製錬炉で生成され予熱予備還元
炉に導入されるガスの温度を300乃至800℃、前記製錬炉
で生成するガスの酸化度〔（H2O＋CO2）／（H2＋H2O＋C
O＋CO2）〕を0.4乃至0.6、予熱予備還元炉での予備還元
率を30％以下とすることを特徴とする溶融還元法。An iron ore preheated and pre-reduced in a preheating pre-reduction furnace is directly charged from a pre-heating pre-reduction furnace into a smelting furnace, and a carbon material and a slag-making agent are charged into the smelting furnace. Oxygen is blown into the smelting furnace from the top blowing oxygen lance having nozzles for decarburization and secondary combustion, and at the same time, gas for agitation is blown from the tuyeres provided on the side walls and the bottom of the smelting furnace to remove iron ore. A method of smelting reduction, wherein the temperature of gas generated in the smelting furnace and introduced into the preheating pre-reduction furnace is 300 to 800 ° C., and the degree of oxidation of gas generated in the smelting furnace [(H 2 O + CO 2 ) / (H 2 + H 2 O + C
O + CO 2 )], and a pre-reduction rate in a pre-heating pre-reduction furnace is 30% or less.
であることを特徴とする特許請求の範囲第１項に記載の
溶融還元法。2. The smelting reduction method according to claim 1, wherein said preheating pre-reduction furnace is a fluidized bed type reactor.
装置であることを特徴とする特許請求の範囲第１項に記
載の溶融還元法。3. The smelting reduction method according to claim 1, wherein said preheating pre-reduction furnace is a shaft furnace type reactor.
の反応装置であることを特徴とする特許請求の範囲第１
項に記載の溶融還元法。4. The method according to claim 1, wherein said preheating pre-reduction furnace is a rotary kiln type reactor.
The smelting reduction method according to the item.
装置を設け、予熱予備還元炉の排ガスを鉄鉱石予熱装置
に導入して鉄鉱石を予熱することを特徴とする特許請求
の範囲第１項乃至第４項の何れか１項に記載の溶融還元
法。5. An iron ore preheating device is provided downstream of the preheating pre-reduction furnace, and the exhaust gas of the preheating pre-reduction furnace is introduced into the iron ore preheating device to preheat the iron ore. The smelting reduction method according to any one of items 1 to 4.
前記炉内に投入することを特徴とする特許請求の範囲第
１項乃至第５項の何れか１項に記載の溶融還元法。6. The smelting reduction method according to any one of claims 1 to 5, wherein the massive carbon material is introduced into the furnace by gravity drop from above the smelting furnace. .
ら吹き込むことを特徴とする特許請求の範囲第１項乃至
第６項の何れか１項に記載の溶融還元法。7. The smelting reduction method according to claim 1, wherein the carbonaceous material is blown from a nozzle of the top-blown oxygen lance.
Priority Applications (11)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP62322322A JP2600733B2 (en) | 1987-12-18 | 1987-12-18 | Smelting reduction method |
| US07/283,218 US4995906A (en) | 1987-12-18 | 1988-12-12 | Method for smelting reduction of iron ore |
| AU26831/88A AU604589C (en) | 1987-12-18 | 1988-12-13 | Method for smelting reduction of iron ore and apparatus therefor |
| CA000586081A CA1336744C (en) | 1987-12-18 | 1988-12-16 | Method for smelting reduction of iron ore and apparatus therefor |
| BR888806668A BR8806668A (en) | 1987-12-18 | 1988-12-16 | PROCESS AND APPARATUS FOR REDUCING IRON ORE BY FOUNDATION |
| CN 88108700 CN1014432B (en) | 1987-12-18 | 1988-12-17 | Process and apparatus for smelting and rducing iron ores |
| KR1019880016851A KR910008142B1 (en) | 1987-12-18 | 1988-12-17 | Method for smelting reduction of iron ore |
| DE3888803T DE3888803T2 (en) | 1987-12-18 | 1988-12-19 | Method and device for smelting reduction of iron ores. |
| EP88121236A EP0320999B1 (en) | 1987-12-18 | 1988-12-19 | Method for smelting reduction of iron ore and apparatus therefor |
| AT88121236T ATE103638T1 (en) | 1987-12-18 | 1988-12-19 | METHOD AND DEVICE FOR SMELTING REDUCTION OF IRON ORES. |
| US07/599,679 US5074530A (en) | 1987-12-18 | 1990-10-17 | Apparatus for smelting reduction of iron ore |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP62322322A JP2600733B2 (en) | 1987-12-18 | 1987-12-18 | Smelting reduction method |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| JPH01162711A JPH01162711A (en) | 1989-06-27 |
| JP2600733B2 true JP2600733B2 (en) | 1997-04-16 |
Family
ID=18142341
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP62322322A Expired - Fee Related JP2600733B2 (en) | 1987-12-18 | 1987-12-18 | Smelting reduction method |
Country Status (1)
| Country | Link |
|---|---|
| JP (1) | JP2600733B2 (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| KR101406622B1 (en) * | 2012-12-21 | 2014-06-12 | 주식회사 포스코 | Method for recycling iron-bearing byproduct and device used for the same |
Families Citing this family (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN1326667C (en) * | 2005-07-26 | 2007-07-18 | 安阳市贞元（集团）有限责任公司 | Equipment for quick replacing cylinder for liquefied gas in cars |
| AT506042A1 (en) * | 2007-11-13 | 2009-05-15 | Siemens Vai Metals Tech Gmbh | METHOD FOR MELTING RAW IRONS AND STEEL PREPARED PRODUCTS IN A MELTING GASER |
| CN115287387B (en) * | 2022-08-18 | 2023-07-21 | 中国科学院过程工程研究所 | Electric energy heating hydrogen smelting reduction iron-making method |
Family Cites Families (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPS6164807A (en) * | 1984-09-03 | 1986-04-03 | Nippon Steel Corp | Melt reduction method of iron ore |
-
1987
- 1987-12-18 JP JP62322322A patent/JP2600733B2/en not_active Expired - Fee Related
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| KR101406622B1 (en) * | 2012-12-21 | 2014-06-12 | 주식회사 포스코 | Method for recycling iron-bearing byproduct and device used for the same |
| WO2014098491A1 (en) * | 2012-12-21 | 2014-06-26 | 주식회사 포스코 | Method for reusing iron-containing by-product and apparatus therefor |
Also Published As
| Publication number | Publication date |
|---|---|
| JPH01162711A (en) | 1989-06-27 |
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