JPS62224619A - Method for supplying carbon material to melting reduction furnace - Google Patents
Method for supplying carbon material to melting reduction furnaceInfo
- Publication number
- JPS62224619A JPS62224619A JP6755086A JP6755086A JPS62224619A JP S62224619 A JPS62224619 A JP S62224619A JP 6755086 A JP6755086 A JP 6755086A JP 6755086 A JP6755086 A JP 6755086A JP S62224619 A JPS62224619 A JP S62224619A
- Authority
- JP
- Japan
- Prior art keywords
- slag
- carbon material
- lump
- carbonaceous material
- furnace
- 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
- 239000003575 carbonaceous material Substances 0.000 title claims abstract description 57
- 238000000034 method Methods 0.000 title claims abstract description 14
- 238000002844 melting Methods 0.000 title claims abstract description 9
- 230000008018 melting Effects 0.000 title claims abstract description 9
- 239000002893 slag Substances 0.000 claims abstract description 37
- 239000002184 metal Substances 0.000 claims abstract description 19
- 229910052751 metal Inorganic materials 0.000 claims abstract description 19
- 238000003723 Smelting Methods 0.000 claims description 9
- 238000010406 interfacial reaction Methods 0.000 claims description 2
- 238000006243 chemical reaction Methods 0.000 abstract description 11
- 238000007664 blowing Methods 0.000 abstract description 9
- 239000007789 gas Substances 0.000 abstract description 8
- 239000000843 powder Substances 0.000 abstract description 4
- QVGXLLKOCUKJST-UHFFFAOYSA-N atomic oxygen Chemical compound [O] QVGXLLKOCUKJST-UHFFFAOYSA-N 0.000 abstract description 3
- 239000001301 oxygen Substances 0.000 abstract description 3
- 229910052760 oxygen Inorganic materials 0.000 abstract description 3
- 239000003638 chemical reducing agent Substances 0.000 abstract description 2
- -1 ore Substances 0.000 abstract description 2
- 239000000126 substance Substances 0.000 abstract 2
- 238000007670 refining Methods 0.000 abstract 1
- 238000006722 reduction reaction Methods 0.000 description 15
- 238000002485 combustion reaction Methods 0.000 description 9
- XEEYBQQBJWHFJM-UHFFFAOYSA-N Iron Chemical compound [Fe] XEEYBQQBJWHFJM-UHFFFAOYSA-N 0.000 description 6
- 239000000571 coke Substances 0.000 description 5
- 239000002994 raw material Substances 0.000 description 5
- 239000003245 coal Substances 0.000 description 4
- MYMOFIZGZYHOMD-UHFFFAOYSA-N Dioxygen Chemical compound O=O MYMOFIZGZYHOMD-UHFFFAOYSA-N 0.000 description 3
- 229910001882 dioxygen Inorganic materials 0.000 description 3
- 229910052742 iron Inorganic materials 0.000 description 3
- 239000000463 material Substances 0.000 description 3
- 239000012768 molten material Substances 0.000 description 3
- XKRFYHLGVUSROY-UHFFFAOYSA-N Argon Chemical compound [Ar] XKRFYHLGVUSROY-UHFFFAOYSA-N 0.000 description 2
- ATUOYWHBWRKTHZ-UHFFFAOYSA-N Propane Chemical compound CCC ATUOYWHBWRKTHZ-UHFFFAOYSA-N 0.000 description 2
- 230000000694 effects Effects 0.000 description 2
- 238000005516 engineering process Methods 0.000 description 2
- 239000002002 slurry Substances 0.000 description 2
- OKTJSMMVPCPJKN-UHFFFAOYSA-N Carbon Chemical compound [C] OKTJSMMVPCPJKN-UHFFFAOYSA-N 0.000 description 1
- 229910000831 Steel Inorganic materials 0.000 description 1
- 239000000956 alloy Substances 0.000 description 1
- 229910045601 alloy Inorganic materials 0.000 description 1
- 229910052786 argon Inorganic materials 0.000 description 1
- 229910052799 carbon Inorganic materials 0.000 description 1
- 239000012159 carrier gas Substances 0.000 description 1
- 239000003610 charcoal Substances 0.000 description 1
- 239000003795 chemical substances by application Substances 0.000 description 1
- 235000013399 edible fruits Nutrition 0.000 description 1
- 230000004907 flux Effects 0.000 description 1
- 239000000446 fuel Substances 0.000 description 1
- 238000010438 heat treatment Methods 0.000 description 1
- 150000002739 metals Chemical class 0.000 description 1
- 239000001294 propane Substances 0.000 description 1
- 238000010186 staining Methods 0.000 description 1
- 239000010959 steel Substances 0.000 description 1
- 238000009628 steelmaking Methods 0.000 description 1
- 239000000725 suspension Substances 0.000 description 1
Landscapes
- Manufacture Of Iron (AREA)
Abstract
Description
【発明の詳細な説明】
〔産業上の利用分野〕
本発明は、酸化物系鉱石を溶融還元するに際して、炭材
のもつ機能を充分に発揮させるように炭材を供給する方
法に関する。DETAILED DESCRIPTION OF THE INVENTION [Field of Industrial Application] The present invention relates to a method of supplying carbonaceous material so as to fully exhibit its functions when melting and reducing oxide ores.
最近、高炉・転炉法に代わる製鋼技術として溶融還元製
錬法が注目を浴びている。この方法で使用する溶融還元
炉は、使用する原料に制約を受けることなく、より小規
模な設備により鉄系合金溶湯を製造することを目的とし
て開発されたものである。Recently, the smelting reduction smelting method has been attracting attention as a steelmaking technology to replace the blast furnace/converter method. The smelting reduction furnace used in this method was developed for the purpose of producing molten iron-based alloys using smaller-scale equipment without being restricted by the raw materials used.
このような溶融還元炉の一つとして、本発明者等は先に
第３図に示す形式の炉を提案した（特願昭６１−２２８
９５号）。この炉は、固定式の縦型炉部１と該縦型炉部
ｌに対して着脱可能に設けられた容器部２を備えている
。容器部２は、台車３に載置されており、別の容器部２
と容易に交換することを可能にしている。As one of such melting reduction furnaces, the present inventors previously proposed a furnace of the type shown in Fig. 3 (Japanese Patent Application No. 61-228).
No. 95). This furnace includes a fixed vertical furnace section 1 and a container section 2 that is detachably attached to the vertical furnace section 1. The container part 2 is placed on a trolley 3, and another container part 2
This allows for easy exchange.
容器部２は、主として？′８融金属８等からなる溶融物
を収容するものであり、酸素ガス及びプロパン、微粉炭
等の燃料を溶融物に吹き込む底吹き羽口１１が底壁に設
けられている。底吹き羽口１１を介して容器部２内に吹
き込まれたガスは、溶融金属８中を気泡１０となって上
昇し、投入原料に対する還元反応を進める。The container part 2 is mainly ? It houses a molten material made of molten metal 8, etc., and a bottom blowing tuyere 11 for blowing oxygen gas and fuel such as propane, pulverized coal, etc. into the molten material is provided on the bottom wall. The gas blown into the container section 2 through the bottom blowing tuyere 11 rises in the form of bubbles 10 in the molten metal 8, and advances the reduction reaction to the input raw material.
また、容器部２の下部にはクノプホール１２或いはスラ
イディングゲートが設けられており、このクノプホール
１２或いはスライディングゲートを介して任意の時間に
溶融金属８．スラグ９等の溶融物が炉外に排出される。Further, a Knophole 12 or a sliding gate is provided at the lower part of the container portion 2, and the molten metal 8. The molten material such as slag 9 is discharged outside the furnace.
他方、縦型炉部１は、垂直円筒状或いは部分的に径大化
した円筒状の形状をもつ。該縦型炉部Ｉの下部は容器部
２に密着・離脱自在にされており、その上部は排ガス１
３を排ガス利用系に送るためのダクトにつながっている
。該縦型炉部ｌの下部は、フォーミングしたスラグ９の
一部に浸漬されている。On the other hand, the vertical furnace section 1 has a vertical cylindrical shape or a cylindrical shape with a partially enlarged diameter. The lower part of the vertical furnace part I is in close contact with the container part 2 and can be detached from it, and the upper part is connected to the exhaust gas 1.
3 is connected to the duct that sends the exhaust gas to the exhaust gas utilization system. The lower part of the vertical furnace part 1 is immersed in a part of the formed slag 9.
この縦型炉部１には、垂直上方からランス４及び斜め上
方又は横方向から複数のランス５が挿入されるようにな
っている。これらランス４，５から、酸素ガス等のガス
及び／又は鉱石１石炭等の粉体が炉内に吹き込まれる。A lance 4 and a plurality of lances 5 are inserted into the vertical furnace section 1 from vertically above and from diagonally above or laterally. Gas such as oxygen gas and/or powder such as ore 1 coal is blown into the furnace from these lances 4 and 5.
更に、この縦型炉部ｌには、鉱石又はその成形物、塊状
炭材等の塊状物を投入するため、たとえばスクリューフ
ィーダ６８等の搬送手段を備えた塊状物投入装置６が設
けられている。Further, this vertical furnace part l is provided with a lump charging device 6 equipped with a conveying means such as a screw feeder 68, for charging lumps such as ore or its molded material, and lump carbonaceous materials. .
この溶融還元炉においては、炭材が懸濁しているスラグ
９と７８融合属８との接触を充分に行うことにより、そ
の界面における製錬反応を促進させる。また、スラグ９
層中でもＣ＋ ＦｅＯ→Ｆｅ＋ＣＯの反応を行っている
。このような還元反応を迅速に行わせるには、スラグ９
を高い温度に維持することが必要であり、炭材がスラグ
内に充分懸濁している状態に維持することが要求される
。この懸濁状態が良好であるとき、２ＣＯ＋０ｚ−２Ｃ
ｏ□の反応が迅速に行われ二次燃焼率（ＣＯｚ／ＣＯ十
ＣＯ□）を高めることができ、また炭材の燃焼により発
生した燃焼熱を充分にスラグに伝えることができる。In this smelting reduction furnace, the slag 9 in which carbonaceous material is suspended and the 78 fused metal 8 are brought into sufficient contact to promote the smelting reaction at the interface. Also, slag 9
A reaction of C+ FeO→Fe+CO takes place in the layer as well. In order to carry out such a reduction reaction quickly, slag 9
It is necessary to maintain the slag at a high temperature, and it is required to maintain the carbonaceous material in a sufficiently suspended state within the slag. When this suspension state is good, 2CO+0z-2C
The reaction of 0□ is carried out quickly and the secondary combustion rate (COz/CO x CO□) can be increased, and the combustion heat generated by combustion of the carbonaceous material can be sufficiently transferred to the slag.
このように、スラグ９に添加される炭材には、反応域を
還元雰囲気とすること及び燃焼により高温を維持するこ
との２種類の異なった機能を期待している。しかしなが
ら、それぞれの機能を充分に発揮させるための方策は、
これまでのところ提案されていない。In this way, the carbonaceous material added to the slag 9 is expected to have two different functions: creating a reducing atmosphere in the reaction zone and maintaining high temperature through combustion. However, the measures to fully demonstrate each function are as follows.
Not proposed so far.
たとえば、コークス充填層を使用するとき、スラグとコ
ークスとの界面における反応が緩慢であり、生産性の低
いものとなる。すなわち、鉄鉱石の還元反応は、スラグ
と溶融金属との界面以外にも、スラグと炭材との界面で
も一部生じているものと推察される。そして、後者の界
面における反応は、スラグと炭材との界面の面積に比例
するものと考えられる。したがって、溶融還元法にお゛
ける生産性を向上させるには、界面の面積を大きくする
小粒又は粉状の炭材を使用することが好ましい。For example, when a coke-filled bed is used, the reaction at the interface between slag and coke is slow, resulting in low productivity. That is, it is inferred that the reduction reaction of iron ore occurs not only at the interface between the slag and the molten metal but also at the interface between the slag and the carbonaceous material. The reaction at the latter interface is considered to be proportional to the area of the interface between the slag and the carbonaceous material. Therefore, in order to improve productivity in the smelting reduction method, it is preferable to use small grain or powdered carbon material that increases the area of the interface.
また、炭材として粉炭を用いる場合、その粉炭が上界気
流に乗って吹き上げられるので、歩留が悪くなる。また
、吹き上げられた粉体が炉外で燃焼することになるので
、燃焼により生成した熱を酸化物原料の還元に有効利用
されない。Furthermore, when powdered coal is used as the carbon material, the powdered coal is blown up by the upper airflow, resulting in poor yield. Further, since the powder blown up is burned outside the furnace, the heat generated by combustion cannot be effectively used for reducing the oxide raw material.
そこで、本発明は、このような炭材の挙動について研究
、考察を重ねた結果案出されたものであり、性状の異な
る炭材をその性状毎に使い分けることにより、溶融還元
に好適な高温で還元性のスラグ雰囲気を効果的に作るこ
とを目的とする。Therefore, the present invention was devised as a result of repeated research and consideration on the behavior of such carbonaceous materials, and by using carbonaceous materials with different properties depending on their properties, it is possible to produce carbonaceous materials at high temperatures suitable for melting and reduction. The purpose is to effectively create a reducing slag atmosphere.
本発明の炭材供給方法は、溶融金属とスラグとの界面反
応を主として酸化物系鉱石を溶融還元する方法において
、スラグに供給する炭材を塊状炭材と粉状炭材とに分け
、塊状炭材：粉状炭材の供給割合を８５：１５〜５０
： ５０に調整することを特徴とする。The carbonaceous material supply method of the present invention is a method in which oxide ore is melted and reduced mainly through an interfacial reaction between molten metal and slag, and the carbonaceous material to be supplied to slag is divided into lumpy carbonaceous material and powdered carbonaceous material. Charcoal material: Supply ratio of powdered carbon material is 85:15-50
: It is characterized by adjusting to 50.
本発明においては、スラグに供給する炭材を塊状炭材と
粉状炭材とに分けて、それぞれの炭材がもつ機能を効果
的に活用するものである。In the present invention, the carbonaceous material supplied to the slag is divided into lumpy carbonaceous material and powdery carbonaceous material, and the functions of each carbonaceous material are effectively utilized.
すなわち、塊状炭材は、燃焼によりそれ自体が発熱する
。したがって、塊状炭材によりスラグを必要な温度に加
熱することが容易である。したがって、スラグへの着熱
効率が上昇する。この塊状炭材がスラグの加熱に与える
影舌を、第１図に示す。また、塊状炭材は、その形態か
らして多量に投入することが容易である。しかし、この
塊状炭材は、比表面積が小さく、その表面における還元
反応は僅かである。この点から、塊状炭材を投入原料に
対する還元剤として使用することは得策でない。That is, the lump carbonaceous material itself generates heat through combustion. Therefore, it is easy to heat the slag to the required temperature using the lump carbonaceous material. Therefore, the heat transfer efficiency to the slag increases. Figure 1 shows the effect that this lumpy carbonaceous material has on the heating of slag. Further, lump carbonaceous material can be easily introduced in large quantities due to its form. However, this lumpy carbonaceous material has a small specific surface area, and the reduction reaction on its surface is slight. From this point of view, it is not advisable to use lump carbonaceous material as a reducing agent for input raw materials.
この塊状炭材の添加方法としては、スクリューフィーダ
、ベルトフィーダ等を使用した落し込みが採用される。As a method of adding this lump carbonaceous material, dropping using a screw feeder, belt feeder, etc. is adopted.
他方、粉状炭材は、比表面積が大きく、スラグ及び）容
融合属に対する反応性が高い。この粉状炭材が反応速度
に与える影響を、第２図に示す。また、粉状炭材は、容
器部２内で流動するスラグ９の循環流に乗って溶融金属
８とスラグ９との界面に運ばれるため、還元反応に寄与
する率も高い。On the other hand, powdered carbonaceous material has a large specific surface area and is highly reactive to slag and fused metals. The influence of this powdery carbonaceous material on the reaction rate is shown in Figure 2. Further, since the powdered carbonaceous material is carried to the interface between the molten metal 8 and the slag 9 by the circulating flow of the slag 9 flowing within the container section 2, it has a high rate of contributing to the reduction reaction.
更に、ガスによる吹込みが可能なため、容器部２内の必
要な個所に送り込むことができる。しかし、この粉状炭
材は、燃焼により損失する割合が大きく、また大量に投
入することも困難である。この点から、粉状炭材を燃焼
用に使用することは得策でない。Furthermore, since gas can be blown into the container 2, it can be delivered to a necessary location within the container section 2. However, this powdered carbonaceous material has a large loss rate due to combustion, and it is also difficult to input it in large quantities. From this point of view, it is not a good idea to use powdered carbonaceous material for combustion.
この粉状炭材の添加方法としては、ノズル、ランス等を
介したガス吹込み、オイルスラリーのようにスラリー化
したものを押し込む方法等がある。Methods for adding this powdered carbonaceous material include blowing gas through a nozzle, lance, etc., and forcing a slurry such as oil slurry into the material.
また、底吹き羽口１１を介して粉状炭材を容器部２内に
吹込み、溶融金属８中を上昇させてスラグ９に送り込む
こともできる。このような吹込みによるとき、溶融金属
８の浸炭も行われる。この浸炭された溶融金属８は、ス
ラグと溶融金属との界面における反応に使用される炭素
の補給源として働くので、効果的である。Alternatively, powdered carbonaceous material can be blown into the container portion 2 through the bottom blowing tuyere 11, raised in the molten metal 8, and fed into the slag 9. When such blowing is performed, the molten metal 8 is also carburized. This carburized molten metal 8 is effective because it serves as a replenishment source of carbon used in the reaction at the interface between the slag and the molten metal.
このように、本発明においては、それぞれの炭材の性状
に濃み、塊状炭材を燃焼用に使用し、粉状炭材をＪス元
剤として使用する。これにより、溶融還元に必要な還元
度及び温度をスラグに与えることが可能となる。As described above, in the present invention, the properties of each carbon material are dense, and the lumpy carbon material is used for combustion, and the powdered carbon material is used as the J-staining agent. This makes it possible to provide the slag with the degree of reduction and temperature necessary for melt reduction.
以下、実施例により本発明の特徴を具体的に説明する。 Hereinafter, the features of the present invention will be specifically explained with reference to Examples.
本実施例においては、基本的には第３図と同様な装置を
使用した。そして、塊状炭材はスクリューフィーダー６
ａを介して投入し、粉状炭材はランス５を介して吹き込
んだ。In this example, an apparatus basically similar to that shown in FIG. 3 was used. Then, the lump carbon material is fed to the screw feeder 6.
The powdered carbonaceous material was blown in through lance 5.
内容積３０トンの製錬炉に、溶銑２０トン、フラックス
としてＣａ０２．７ トン及び５ｉＯ７１，８トン並
びにコークス１．２トンを投入し、上吹き酸素３００Ｏ
Ｎｒｒ？／時及び底吹き酸素４０ＯＮｆｆｌ／時で炉内
に酸素ガスを吹き込んだ。吹錬中、鉱石（３０％予備還
元鉱）を２００ｋｒ／分の割合で投入した。また、塊状
コークスを３０ｋｇ／分の割合で上から投入し、粉状コ
ークスを１０ｋｇ／分の割合でアルゴンをキャリアガス
とした１ｏＯＮｎ？／時の気流に乗せて、側壁から炉内
のスラグ下降流に吹き込んだ。A smelting furnace with an internal volume of 30 tons was charged with 20 tons of hot metal, 2.7 tons of Ca0 and 1.8 tons of 5iO as flux, and 1.2 tons of coke, and 300 O of top-blown oxygen was charged.
Nrr? Oxygen gas was blown into the furnace at a rate of 40 ONffl/hour and bottom-blown oxygen at 40 ONffl/hour. During blowing, ore (30% pre-reduced ore) was introduced at a rate of 200 kr/min. In addition, lump coke was added from above at a rate of 30 kg/min, and powdered coke was added at a rate of 10 kg/min using argon as a carrier gas. The slag was blown from the side wall into the downward flow of slag inside the furnace, carried by the air current.
製錬を１時間行ったところ、７トンの溶銑が得られた。After 1 hour of smelting, 7 tons of hot metal was obtained.
そのときの、着熱効率及び反応速度定数は、それぞれ７
５％及び６０ｋｒ−鉄／分（％Ｔｉｅ）であった。At that time, the heat transfer efficiency and reaction rate constant were each 7
5% and 60kr-iron/min (%Tie).
以上に説明したように、本発明においては、塊状炭材及
び粉状炭材のそれぞれの特性を使い分けることにより１
．スラグを溶融還元に好適な雰囲気に調整することが効
果的に行われる。そのため、酸化物系原料の還元が迅速
に行われ、高い生産性で溶融金属を製造することが可能
となる。As explained above, in the present invention, by properly using the characteristics of lump carbonaceous material and powdery carbonaceous material,
．． The slag is effectively adjusted to an atmosphere suitable for melting and reduction. Therefore, the oxide-based raw material is rapidly reduced, and it becomes possible to produce molten metal with high productivity.
第１図及び第２図は、それぞれ塊状炭材と粉状炭材との
比率がスラグ温度及び反応速度に与える影響を示す。ま
た、第３図は、本発明者等が先に開発した溶融還元炉を
示す。
特許出願人 新日本製鐵 株式台社
代理人 小 堀 益 （ばか２名）第 １
図
粉／（埼＋塊）（χ）
第２図
Ｈ／ ｌ Ｍ ＋ ＆ Ｉ Ｉ７．１
第 ３１！！！ｌFIGS. 1 and 2 show the influence of the ratio of lump carbonaceous material to powdery carbonaceous material on slag temperature and reaction rate, respectively. Furthermore, FIG. 3 shows a melting reduction furnace that was previously developed by the present inventors. Patent applicant: Nippon Steel Corporation Representative: Masu Kobori (2 idiots) No. 1
Figure powder/(Sait + lump) (χ) Figure 2 H/ l M + & I I7.1 No. 31! ! ! l
Claims (1)
鉱石を溶融還元する方法において、スラグに供給する炭
材を塊状炭材と粉状炭材とに分け、塊状炭材：粉状炭材
の供給割合を８５：１５〜５０：５０に調整することを
特徴とする溶融還元炉への炭材供給方法。1. In a method of melting and reducing oxide ores mainly through an interfacial reaction between molten metal and slag, the carbonaceous material supplied to the slag is divided into lumpy carbonaceous material and powdery carbonaceous material. A method for supplying carbonaceous material to a smelting reduction furnace, the method comprising adjusting the supply ratio of 85:15 to 50:50.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP6755086A JPS62224619A (en) | 1986-03-25 | 1986-03-25 | Method for supplying carbon material to melting reduction furnace |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP6755086A JPS62224619A (en) | 1986-03-25 | 1986-03-25 | Method for supplying carbon material to melting reduction furnace |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| JPS62224619A true JPS62224619A (en) | 1987-10-02 |
Family
ID=13348182
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP6755086A Pending JPS62224619A (en) | 1986-03-25 | 1986-03-25 | Method for supplying carbon material to melting reduction furnace |
Country Status (1)
| Country | Link |
|---|---|
| JP (1) | JPS62224619A (en) |
Cited By (7)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US5078785A (en) * | 1989-09-04 | 1992-01-07 | Nippon Steel Corporation | Method of operating in-bath smelting reduction furnace |
| WO1997012066A1 (en) * | 1995-09-28 | 1997-04-03 | Kawasaki Steel Corporation | Chromium ore smelting reduction process |
| WO1997038141A1 (en) * | 1996-04-05 | 1997-10-16 | Nippon Steel Corporation | Smelting reduction apparatus and method of operating the same |
| EP1098997A4 (en) * | 1998-07-01 | 2003-07-02 | Tech Resources Pty Ltd | A direct smelting process |
| EP1434888A1 (en) * | 2001-10-09 | 2004-07-07 | Technological Resources Pty. Ltd. | Supplying solid feed materials for a direct smelting process |
| WO2006011774A1 (en) * | 2004-07-30 | 2006-02-02 | Posco | Apparatus for manufacturing molten irons by injecting fine coals into a melter-gasifier and the method using the same. |
| US7662210B2 (en) | 2004-07-30 | 2010-02-16 | Posco | Apparatus for manufacturing molten irons by injecting fine coals into a melter-gasifier and the method using the same |
-
1986
- 1986-03-25 JP JP6755086A patent/JPS62224619A/en active Pending
Cited By (13)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US5078785A (en) * | 1989-09-04 | 1992-01-07 | Nippon Steel Corporation | Method of operating in-bath smelting reduction furnace |
| WO1997012066A1 (en) * | 1995-09-28 | 1997-04-03 | Kawasaki Steel Corporation | Chromium ore smelting reduction process |
| AU685713B2 (en) * | 1995-09-28 | 1998-01-22 | Kawasaki Steel Corporation | Chromium ore smelting reduction process |
| CN1042444C (en) * | 1995-09-28 | 1999-03-10 | 川崎制铁株式会社 | Chromium ore smelting redution process |
| WO1997038141A1 (en) * | 1996-04-05 | 1997-10-16 | Nippon Steel Corporation | Smelting reduction apparatus and method of operating the same |
| EP1098997A4 (en) * | 1998-07-01 | 2003-07-02 | Tech Resources Pty Ltd | A direct smelting process |
| EP1434888A1 (en) * | 2001-10-09 | 2004-07-07 | Technological Resources Pty. Ltd. | Supplying solid feed materials for a direct smelting process |
| EP1434888A4 (en) * | 2001-10-09 | 2004-12-15 | Tech Resources Pty Ltd | Supplying solid feed materials for a direct smelting process |
| US7422622B2 (en) | 2001-10-09 | 2008-09-09 | Technologies Resources Pty Ltd. | Supplying solid feed materials for a direct smelting process |
| WO2006011774A1 (en) * | 2004-07-30 | 2006-02-02 | Posco | Apparatus for manufacturing molten irons by injecting fine coals into a melter-gasifier and the method using the same. |
| AU2005265480B2 (en) * | 2004-07-30 | 2008-06-12 | Posco | Apparatus for manufacturing molten irons by injecting fine coals into a melter-gasifier and the method using the same |
| US7662210B2 (en) | 2004-07-30 | 2010-02-16 | Posco | Apparatus for manufacturing molten irons by injecting fine coals into a melter-gasifier and the method using the same |
| KR101121197B1 (en) | 2004-07-30 | 2012-03-23 | 주식회사 포스코 | Apparatus for manufacturing molten irons directly using raw coals and fine ores by injecting fine carboneous materials into a melter-gasifier and the method using the same |
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