JPH02209409A - Smelting reduction iron-making method - Google Patents
Smelting reduction iron-making methodInfo
- Publication number
- JPH02209409A JPH02209409A JP2855489A JP2855489A JPH02209409A JP H02209409 A JPH02209409 A JP H02209409A JP 2855489 A JP2855489 A JP 2855489A JP 2855489 A JP2855489 A JP 2855489A JP H02209409 A JPH02209409 A JP H02209409A
- Authority
- JP
- Japan
- Prior art keywords
- reduction
- furnace
- smelting reduction
- reduction furnace
- smelting
- 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
- 230000009467 reduction Effects 0.000 title claims abstract description 82
- 238000003723 Smelting Methods 0.000 title claims abstract description 38
- 238000000034 method Methods 0.000 title abstract description 7
- XEEYBQQBJWHFJM-UHFFFAOYSA-N Iron Chemical compound [Fe] XEEYBQQBJWHFJM-UHFFFAOYSA-N 0.000 claims abstract description 22
- 239000002893 slag Substances 0.000 claims abstract description 20
- 229910052742 iron Inorganic materials 0.000 claims abstract description 11
- 229910000805 Pig iron Inorganic materials 0.000 claims description 12
- 238000004519 manufacturing process Methods 0.000 claims description 6
- 239000007789 gas Substances 0.000 abstract description 21
- 238000010079 rubber tapping Methods 0.000 abstract description 10
- 239000002994 raw material Substances 0.000 abstract description 9
- 239000000428 dust Substances 0.000 abstract description 6
- 238000005243 fluidization Methods 0.000 abstract description 4
- 239000012159 carrier gas Substances 0.000 abstract 1
- 238000007599 discharging Methods 0.000 abstract 1
- 238000007796 conventional method Methods 0.000 description 8
- 238000002844 melting Methods 0.000 description 8
- 230000008018 melting Effects 0.000 description 8
- 230000008859 change Effects 0.000 description 3
- 230000000694 effects Effects 0.000 description 2
- 230000008569 process Effects 0.000 description 2
- 238000011946 reduction process Methods 0.000 description 2
- QVGXLLKOCUKJST-UHFFFAOYSA-N atomic oxygen Chemical compound [O] QVGXLLKOCUKJST-UHFFFAOYSA-N 0.000 description 1
- 238000010923 batch production Methods 0.000 description 1
- 238000007664 blowing Methods 0.000 description 1
- 239000003575 carbonaceous material Substances 0.000 description 1
- 239000011362 coarse particle Substances 0.000 description 1
- 238000010586 diagram Methods 0.000 description 1
- 238000005516 engineering process Methods 0.000 description 1
- 230000004907 flux Effects 0.000 description 1
- 238000010409 ironing Methods 0.000 description 1
- 239000001301 oxygen Substances 0.000 description 1
- 229910052760 oxygen Inorganic materials 0.000 description 1
- 239000000843 powder Substances 0.000 description 1
- 238000003756 stirring Methods 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、予備還元炉を備えた設備における溶融還元製
鉄法に関する。DETAILED DESCRIPTION OF THE INVENTION [Industrial Field of Application] The present invention relates to a smelting reduction iron manufacturing method in equipment equipped with a preliminary reduction furnace.
最近注目を浴びている鉄鉱石の鉄浴式溶融還元法では、
予備還元炉で予備還元および予熱された粉鉱石が、炭材
およびフラックス等とともに炉内に装入され、酸素およ
び攪拌用ガスを吹込むことにより還元処理が行われる。The iron bath smelting reduction method for iron ore, which has recently attracted attention,
Fine ore that has been pre-reduced and preheated in a pre-reduction furnace is charged into the furnace together with carbonaceous material, flux, etc., and reduction treatment is performed by blowing oxygen and stirring gas into the furnace.
このような溶融還元の操業は、所謂バッチ処理であり、
炉に原材料を装入して一定時間還元処理（通常、３時間
程度）を行った後、出滓・出銑（以下、出滓・銑という
）がなされ、再び次の処理のための原料装入がなされる
。したがって、出滓・銑と次の出滓・銑との間の時間的
間隔が長く、連続的ないし短サイクルでの出滓・銑は全
く望み得ない。This type of melt reduction operation is a so-called batch process.
After charging raw materials into the furnace and performing reduction treatment for a certain period of time (usually about 3 hours), slag and iron tapping (hereinafter referred to as slag and pig iron) are performed, and the raw materials are loaded again for the next treatment. entry is made. Therefore, the time interval between slag/pig and the next slag/pig is long, and continuous or short cycle slag/pig cannot be expected at all.
また、上述した予備還元炉としては流動層形式のものが
一般に用いられるが、溶融還元炉にバッチ式で原料を供
給する必要から、その炉容量は大きなものとならざるを
得ない。Furthermore, although a fluidized bed type furnace is generally used as the above-mentioned preliminary reduction furnace, the capacity of the furnace must be large because it is necessary to supply raw materials to the smelting reduction furnace in a batch manner.
また、溶融還元炉では出滓・銑時に発生ガス量が極端に
減少するため、予備還元炉への供給ガス量不足により炉
内の流動化不良を生じ易いという問題もある。In addition, since the amount of gas generated in the smelting reduction furnace is extremely reduced during slag tapping and pig ironing, there is also the problem that insufficient fluidization in the furnace is likely to occur due to insufficient amount of gas supplied to the preliminary reduction furnace.
本発明はこのような問題を生じない溶融還元製鉄法を提
供ぜんとするものであり、その特徴とするところは、予
備還元炉を備えた設備におｔブる溶融還元製鉄法におい
て、Ｊの予備還元炉に対し、これに発生ガスを供給する
溶融還元炉を２以上設け、これら２以上の溶融還元炉に
ついて交互に出滓・銑をなさしめつつ溶融還元の連続操
業を行うようにしたことにある。The present invention aims to provide a smelting reduction iron manufacturing method that does not cause such problems, and its feature is that J. Two or more smelting reduction furnaces are installed to supply generated gas to the preliminary reduction furnace, and these two or more smelting reduction furnaces are arranged to carry out continuous operation of smelting reduction while alternately producing slag and pig iron. It is in.
本発明において、１つの予備還元炉に対し溶融還元炉を
２つ設けた場合、これら溶融還元炉は出滓・銑が交互に
行われるよう、すなわち、一方の溶融還元炉の出滓・銑
が常にもう一方の溶融還元炉の還元処理時に行われるよ
う操業される。これにより、従来法に較べ出滓・銑が短
サイクルでなされ、連続出滓・銑に近い状態での出滓・
銑も可能となる。In the present invention, when two smelting reduction furnaces are provided for one pre-reduction furnace, these smelting reduction furnaces are configured so that slag and pig iron are alternately produced. It is always operated to perform the reduction process at the same time as the other melting reduction furnace. As a result, compared to the conventional method, slag and pig iron can be produced in a shorter cycle, and continuous slag and pig iron production can be achieved.
Pig can also be used.
また、本発明も各溶融還元炉の処理はバッチ処理である
が、その処理は複数の炉間で周期がずれ、いずれかの炉
で常に還元処理がなされているため、予備還元炉側から
の原料供給という観点からいうと連続処理に近い。すな
わち、予備還元炉から溶融還元炉側にほぼ連続的に原料
を供給するため、従来法に較べ予備還元炉の容量を小さ
くすることができる。In addition, in the present invention, the processing in each melting reduction furnace is batch processing, but the processing cycle is shifted between multiple furnaces, and reduction processing is always performed in one of the furnaces. From the viewpoint of raw material supply, it is close to continuous processing. That is, since the raw material is almost continuously supplied from the preliminary reduction furnace to the smelting reduction furnace side, the capacity of the preliminary reduction furnace can be made smaller compared to the conventional method.
さらに、いずれかの溶融還元炉で処理が行われ、発生ガ
スが平均して得られるため、予備還元炉内の流動化も適
正化することができる。Furthermore, since the process is performed in any of the melting reduction furnaces and the generated gas is obtained on average, fluidization in the pre-reduction furnace can also be optimized.
なお、溶融還元炉は１つの予備還元炉に対し２以上の任
意な数だけ設けることができ、いずれの場合にも、各溶
融還元炉の出滓・銑が交互に（順番に）なされるような
操業が行われる。Note that an arbitrary number of smelting reduction furnaces (two or more) can be provided for one pre-reduction furnace, and in any case, each smelting reduction furnace is designed so that the slag and pig iron are produced alternately (in order). operations will be carried out.
第１図は本発明の一実施状況を示すもので、本実施例は
１つの予備還元炉に対して２つの溶融還元炉を設けた例
である。FIG. 1 shows one implementation situation of the present invention, and this embodiment is an example in which two smelting reduction furnaces are provided for one preliminary reduction furnace.
図において、（１）は予備還元炉、（２Ａ） （２Ｂ）
は溶融還元炉、（３）は溶融還元炉の発生ガスに含まれ
る微粉原料を捕集する集塵装置、（４）は予備還元炉の
排ガスに含まれる微粉鉱石を捕集する集塵装置である。In the figure, (1) is the preliminary reduction furnace, (2A) (2B)
is a smelting reduction furnace, (3) is a dust collector that collects fine raw materials contained in the gas generated from the smelting reduction furnace, and (4) is a dust collector that collects fine ore contained in the exhaust gas of the preliminary reduction furnace. be.
前記溶融還元炉（２Ａ）（２Ｂ）の発生ガスは、集塵装
置（３）を経て予備還元炉（１）に供給される。予備還
元炉（１）には粉鉱石が供給されており、流動層（５）
が形成される。予備還元炉（１）に装入された粉鉱石の
うち、比較的粗粒のものは比較的長く炉内に滞留して予
備還元・予熱された後、鉱石排出管（６）から排出され
、そのまま溶融還元炉に装入される。The gas generated in the melting reduction furnaces (2A) (2B) is supplied to the preliminary reduction furnace (1) via a dust collector (3). Fine ore is supplied to the preliminary reduction furnace (1), and the fluidized bed (5)
is formed. Among the fine ore charged in the pre-reduction furnace (1), relatively coarse particles remain in the furnace for a relatively long time to be pre-reduced and preheated, and then are discharged from the ore discharge pipe (6). It is charged directly into the melting reduction furnace.
一方、比較的細粒の粉鉱石は、排ガスとともに炉外に排
出された後、集塵装置（４）で回収され、気送ガスによ
り溶融還元炉に吹き込まれる。On the other hand, relatively fine ore powder is discharged out of the furnace along with the exhaust gas, and then collected by a dust collector (4) and blown into the smelting reduction furnace by pneumatic gas.
本発明では、溶融還元炉（２ＡＸ２Ｂ）の出滓・銑が交
互に行われるようにして、両溶融還元炉（２ＡＸ２Ｂ）
の運転が行われる。このため、両溶融還元炉（２ＡＸ２
Ｂ）には、それぞれの工程段階に応じ予備還元炉（１）
および集塵装置（４）側から原料が供給されろ。In the present invention, the slag and pig iron in the smelting reduction furnace (2AX2B) are performed alternately, and both the smelting reduction furnaces (2AX2B)
driving will be carried out. For this reason, both melting reduction furnaces (2AX2
B) has a preliminary reduction furnace (1) according to each process stage.
And raw materials are supplied from the dust collector (4) side.
第２図（イ）は、本実施例における発生ガス童の推移と
出銑時期を示している。また同図（ロ）は、従来法（予
備還元炉１つに対し、１つの溶融還元炉を用いる方法）
について、同様の生産量で操業を行った場合の発生ガス
量の推移と出銑時期を示している。これによれば、本発
明では従来方式に較べ発生ガス介が変動幅が小さ（、予
備還元炉側にコンスタントに発生ガスを供給することが
可能であることが判る。また、出滓・銑が溶融還元炉（
２ＡＸ２Ｂ）で交互になされるため従来法に較べ出滓・
銑の周期が短くなっている。FIG. 2(A) shows the change in the amount of gas generated and the tapping timing in this example. In addition, the same figure (b) shows the conventional method (method using one smelting reduction furnace for one preliminary reduction furnace).
The graph shows the changes in the amount of gas generated and the timing of tapping when operating at the same production volume. According to this, it can be seen that in the present invention, the fluctuation range of the generated gas is smaller than in the conventional method (it is possible to constantly supply the generated gas to the pre-reduction furnace side). Melting reduction furnace (
2AX2B), so compared to the conventional method, there is less slag and
Pig cycle is getting shorter.
以上述べた本発明によれば、次のような効果が得られる
。According to the present invention described above, the following effects can be obtained.
（１）複数の溶融還元炉が交互に出滓・銑するので、従
来法に較べ出滓・銑が短サイクルでなされ、連続出滓・
銑に近い状態での出滓・銑が可能となる。(1) Since multiple smelting reduction furnaces alternately tap the slag and pig iron, the slag and pig iron can be tapped in a shorter cycle compared to the conventional method, and the slag and pig iron can be continuously tapped and ironed.
It is possible to tap slag and iron in conditions similar to pig iron.
（２１常にいすもかの炉で溶融還元処理がなされるため
、予備還元炉から溶融還元炉側にはぼ連続的に原料を供
給でき、このため従来法に較べ予備還元炉の容量を小さ
くすることができる。(21) Since the smelting reduction process is always carried out in the Isumoka furnace, raw materials can be almost continuously supplied from the pre-reduction furnace to the smelting-reduction furnace, which reduces the capacity of the pre-reduction furnace compared to the conventional method. be able to.
（３）常にいずれかの溶融還元炉で処理が行われ、発生
ガスが平均して得られるため、予備還元炉の流動層を流
動化不良を生じさせることなく、適正な状態に維持する
ことができる。(3) Since processing is always carried out in one of the melting reduction furnaces and the generated gas is obtained on average, it is possible to maintain the fluidized bed in the pre-reduction furnace in an appropriate state without causing poor fluidization. can.
第１図は本発明の一実施状況を示す全体説明図である。
第２図（イ）は本発明実施例における発生ガス量の推移
と出銑時期とを示したもので、第２図（ロ）は従来法に
おける発生ガス量の推移と出銑時期とを示したものであ
る。
図において、（１）は予備還元炉、（２ＡＸ２Ｂ）は溶
融還元炉である。
特許出願人 日本鋼管株式会社
発 明 者 北 野 良 幸■ｙ
、ｒｚ、”ｒ；冠
四Ｙｒｒ玉慕FIG. 1 is an overall explanatory diagram showing one implementation situation of the present invention. Figure 2 (a) shows the change in the amount of gas generated and the timing of tapping in the example of the present invention, and Figure 2 (b) shows the change in the amount of gas generated and the timing of tapping in the conventional method. It is something that In the figure, (1) is a preliminary reduction furnace, and (2AX2B) is a smelting reduction furnace. Patent applicant: Nippon Kokan Co., Ltd. Inventor: Yoshiyuki Kitano
, rz, “r; crown four Yrr ball
Claims (1)
ガスを供給する溶融還元炉を２ 以上設け、これら２以上の溶融還元炉につ いて交互に出滓・銑をなさしめつつ溶融還 元の連続操業を行うようにしたことを特徴 とする溶融還元製鉄法。[Claims] In a smelting reduction iron manufacturing method in equipment equipped with a preliminary reduction furnace, two or more smelting reduction furnaces are provided for supplying generated gas to one preliminary reduction furnace, and these two or more smelting reduction furnaces are provided. A smelting reduction iron manufacturing method characterized by continuous operation of smelting reduction while alternately producing slag and pig iron.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP2855489A JPH02209409A (en) | 1989-02-09 | 1989-02-09 | Smelting reduction iron-making method |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP2855489A JPH02209409A (en) | 1989-02-09 | 1989-02-09 | Smelting reduction iron-making method |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| JPH02209409A true JPH02209409A (en) | 1990-08-20 |
Family
ID=12251874
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP2855489A Pending JPH02209409A (en) | 1989-02-09 | 1989-02-09 | Smelting reduction iron-making method |
Country Status (1)
| Country | Link |
|---|---|
| JP (1) | JPH02209409A (en) |
-
1989
- 1989-02-09 JP JP2855489A patent/JPH02209409A/en active Pending
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