JPS62228420A - Melting and reducing furnace - Google Patents
Melting and reducing furnaceInfo
- Publication number
- JPS62228420A JPS62228420A JP7089786A JP7089786A JPS62228420A JP S62228420 A JPS62228420 A JP S62228420A JP 7089786 A JP7089786 A JP 7089786A JP 7089786 A JP7089786 A JP 7089786A JP S62228420 A JPS62228420 A JP S62228420A
- Authority
- JP
- Japan
- Prior art keywords
- slag
- melting
- furnace
- reduction
- reducing
- 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
- 238000002844 melting Methods 0.000 title claims abstract description 34
- 230000008018 melting Effects 0.000 title claims abstract description 34
- 239000002893 slag Substances 0.000 claims abstract description 43
- XEEYBQQBJWHFJM-UHFFFAOYSA-N Iron Chemical compound [Fe] XEEYBQQBJWHFJM-UHFFFAOYSA-N 0.000 claims abstract description 28
- 229910052742 iron Inorganic materials 0.000 claims abstract description 14
- 238000003723 Smelting Methods 0.000 claims description 32
- 238000004891 communication Methods 0.000 claims description 10
- 239000000155 melt Substances 0.000 claims description 8
- 239000003245 coal Substances 0.000 claims description 2
- 239000000843 powder Substances 0.000 claims 1
- UQSXHKLRYXJYBZ-UHFFFAOYSA-N Iron oxide Chemical compound [Fe]=O UQSXHKLRYXJYBZ-UHFFFAOYSA-N 0.000 abstract description 12
- QVGXLLKOCUKJST-UHFFFAOYSA-N atomic oxygen Chemical compound [O] QVGXLLKOCUKJST-UHFFFAOYSA-N 0.000 abstract description 10
- 229910052760 oxygen Inorganic materials 0.000 abstract description 10
- 239000001301 oxygen Substances 0.000 abstract description 10
- 238000007664 blowing Methods 0.000 abstract description 4
- 238000007670 refining Methods 0.000 abstract 1
- 239000000126 substance Substances 0.000 abstract 1
- 238000006722 reduction reaction Methods 0.000 description 47
- 238000000034 method Methods 0.000 description 5
- 238000009991 scouring Methods 0.000 description 5
- 229910000805 Pig iron Inorganic materials 0.000 description 3
- 239000003575 carbonaceous material Substances 0.000 description 2
- 230000000694 effects Effects 0.000 description 2
- 238000005516 engineering process Methods 0.000 description 2
- 238000002347 injection Methods 0.000 description 2
- 239000007924 injection Substances 0.000 description 2
- 241001062472 Stokellia anisodon Species 0.000 description 1
- 238000004140 cleaning Methods 0.000 description 1
- 239000000571 coke Substances 0.000 description 1
- 238000007599 discharging Methods 0.000 description 1
- 239000006260 foam Substances 0.000 description 1
- 238000005187 foaming Methods 0.000 description 1
- 239000012768 molten material Substances 0.000 description 1
- 239000002699 waste material 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）
本発明は鉄鉱石等を溶融還元して銑鉄を得るための溶融
還元炉に関するものである。DETAILED DESCRIPTION OF THE INVENTION (Industrial Application Field) The present invention relates to a smelting and reducing furnace for obtaining pig iron by melting and reducing iron ore and the like.
（従来の技術）
近年高炉法等塊コークスや焼結鉱を用いて銑鉄を製造す
る方法に代わり、生鉱石や粉鉱石を予備還元した後、石
炭分等により溶融還元して溶鉄を得る溶融還元法が開発
されている（特開昭６０−１４５３０７号等）、この様
な溶融還元法においては、溶融還元炉炉においてスラグ
が発泡し容積が増大する。このため増大したスラグによ
りランスで上部から吹き込む酸素が充分に炭材に到達す
ることが出来ず溶融還元炉の効率を低下させる原因とも
なっていた。又この発泡したスラグ中には通常のスラグ
より多くの還元されてない酸化鉄が含まれている為、こ
の発泡スラグをそのまま排出すると鉄ロスとなりコスト
の面で不利となる。(Conventional technology) In recent years, instead of the blast furnace method, which uses lump coke and sintered ore to produce pig iron, smelting reduction has been used to preliminarily reduce raw ore or fine ore and then smelt and reduce it with coal, etc. to obtain molten iron. In such a smelting reduction method, which has been developed (Japanese Patent Laid-Open No. 60-145307, etc.), the slag foams in the smelting reduction furnace and its volume increases. For this reason, due to the increased slag, oxygen blown from the top with a lance cannot sufficiently reach the carbonaceous material, causing a reduction in the efficiency of the melting reduction furnace. Moreover, since this foamed slag contains more unreduced iron oxide than normal slag, if this foamed slag is discharged as it is, it will result in iron loss, which is disadvantageous in terms of cost.
（発明が解決しようとする問題点）
従来技術の項で述べた様に溶融還元法で生じる発泡した
スラグを炉外にそのまま排出することなく、炭材、酸素
の供給を可能ならしめ、還元反応効率を高め得る溶融還
元炉を提供することにある。(Problems to be Solved by the Invention) As mentioned in the section of the prior art, it is possible to supply carbonaceous material and oxygen without directly discharging the foamed slag produced in the melting reduction method to the outside of the furnace, and the reduction reaction can be carried out. An object of the present invention is to provide a melting reduction furnace that can improve efficiency.
即ち溶融還元炉でスラグを発泡させずに溶融還元を効率
的に行うことは明確な技術が確立されてないが、発泡し
たスラグをより効率的に処理することにより溶融還元法
を実用的なものとする上で有意義であると、本発明者等
は考え一定以上に発泡したスラグを還元炉から取り除き
、溶融還元を効率的に行うものとし、取り除かれた発泡
したスラグを別の炉で還元を行うことにより鉄ロスを防
止することにした。In other words, although no clear technology has been established to efficiently perform smelting reduction without foaming slag in a smelting reduction furnace, it is possible to make the smelting reduction method practical by processing foamed slag more efficiently. The inventors of the present invention thought that the slag that has foamed above a certain level is removed from the reduction furnace to efficiently perform melting and reduction, and the removed foamed slag is reduced in another furnace. By doing so, we decided to prevent iron loss.
（問題点を解決するための手段）
本発明は鉄鉱石等を溶融しつつ還元する溶融還元炉を複
数の溶融還元炉により構成し、該溶融還元炉を溶融体連
絡通路を介して接続し、複数の溶融還元炉を用いて溶融
還元を行わしめることを特徴とする溶融還元炉である。(Means for Solving the Problems) The present invention comprises a smelting reduction furnace that melts and reduces iron ore etc. by a plurality of smelting reduction furnaces, and connects the smelting reduction furnaces through a melt communication passage, This is a melting reduction furnace characterized by performing melting reduction using a plurality of melting reduction furnaces.
なお該溶融還元炉は同じ形のもので交互に切り替えて主
溶融還元を行い（一方は発泡したスラグ処理の補助還元
を主に受は持つ）、或いは一方を主溶融還元炉とし他方
（１個又は複数）を発泡したスラグのみを処理する補助
還元炉とする構成であっても良い。The smelting reduction furnaces are of the same type and can be switched alternately to perform main smelting reduction (one is mainly used for auxiliary reduction for foamed slag treatment), or one can be the main smelting reduction furnace and the other (one Alternatively, the auxiliary reduction furnace may be configured to process only the foamed slag.
（作用）
本発明では例えば溶融還元炉内で発泡したスラグが一定
値以上になった場合に溶融体連絡通路を経て他方の炉に
スラグを導き出すことが出来、従って溶融還元を行って
いる方の炉のスラグの厚さが常に一定以上とならない為
酸素吹き込みが有効に作用し、必要以上酸素を無駄に使
用しないですむ、また発泡したスラグを他方の炉に溢流
せしめた分については、この他方の炉で還元処理を行な
い、酸化鉄を有効に回収することが出来る。(Function) In the present invention, for example, when the slag foamed in the smelting reduction furnace exceeds a certain value, the slag can be led to the other furnace through the molten body communication passage, so that Since the thickness of the slag in the furnace does not always exceed a certain level, oxygen injection works effectively and there is no need to waste oxygen more than necessary. Reduction treatment is performed in the other furnace, and iron oxide can be effectively recovered.
又二基上の同じ溶融還元炉を前記溶融体連絡通路で接続
することにより溶融還元の連続操業の可能性を行うこと
も可能であり、また一方の炉で還元操業中一方を沈静化
することが出来、鉄浴４の攪拌がより完全に行われ溶融
還元炉１の溶融還元反応の向上を促進する。It is also possible to perform the continuous operation of melting reduction by connecting two identical melting reduction furnaces through the melt communication passage, and it is also possible to perform the possibility of continuous operation of melting reduction while one furnace is performing reduction operation. As a result, the iron bath 4 is more completely stirred, and the smelting reduction reaction in the smelting reduction furnace 1 is promoted.
（実施例） 以下本発明の一実施例を図面でもって説明する。(Example) An embodiment of the present invention will be described below with reference to the drawings.
図面は一方を主溶融還元炉とし、他方を補助溶融還元炉
とした例である。The drawing shows an example in which one side is used as a main smelting reduction furnace and the other side is used as an auxiliary smelting reduction furnace.
主溶融還元炉１の側面に溶融体連絡通路２を介し補助溶
融還元炉３と接続している。ここで主溶融還元炉１で酸
素ランス７で吹き込み溶融還元を行うと鉄浴４は主溶融
還元炉１の底部に溜まり、スラグ層は発泡した精練スラ
グ５と通常のスラグ６の二層構造となり、精練スラグ５
は溶融体連絡通路２をへて補助溶融還元炉３に溢流し溜
まり、補助溶融還元炉３で酸素ランス７で吹き込み溶融
還元を行うと主溶融還元炉１と同様に鉄浴４、精練スラ
グ５と通常のスラグ６を形成する。そして主溶融還元炉
ｌ、補助溶融還元炉３内の浴銑、及びスラグ６は夫々出
銑口８、出滓口９を経て炉外に出銑、出滓される。The main melting and reducing furnace 1 is connected to an auxiliary melting and reducing furnace 3 via a melt communication passage 2 on the side surface thereof. When smelting reduction is carried out by blowing with oxygen lance 7 in main smelting reduction furnace 1, iron bath 4 accumulates at the bottom of main smelting reduction furnace 1, and the slag layer becomes a two-layer structure of foamed scouring slag 5 and normal slag 6. , scouring slag 5
flows through the melt communication passage 2 and accumulates in the auxiliary smelting reduction furnace 3, and when the auxiliary smelting reduction furnace 3 performs melting reduction by blowing with oxygen lance 7, the iron bath 4 and the scouring slag 5 are generated in the same way as in the main smelting reduction furnace 1. and a normal slag 6 is formed. The bath pig iron and slag 6 in the main smelting reduction furnace 1 and the auxiliary smelting reduction furnace 3 are tapped and slaged out of the furnace through a tap port 8 and a slag tap port 9, respectively.
なおこの溶融体連絡通路２の位置は所望のスラグの厚さ
の位置にセットものであるが、前記発泡した精練スラグ
５のみを他方の炉に溢流させるものであるから通常のス
ラグ６の上面より上の位置であることが望ましい。The position of this molten material communication passage 2 is set at the desired thickness of the slag, but since only the foamed scouring slag 5 is allowed to overflow into the other furnace, the upper surface of the normal slag 6 is A higher position is desirable.
（発明の効果）
本発明によれば例えば溶融還元炉内で発泡したスラグは
一定値以上になった場合には溶融体連絡通路を経て他方
の炉にスラグを導き出す為、溶融還元を行っているメイ
ンの炉のスラグの厚さが常に一定以上とならない為、酸
素吹き込みが確実となり、必要以上酸素を無駄に使用し
なくても溶融還元を行うことができる。また出滓される
されるスラグの中の鉄分が減少する他、発泡したスラグ
で他方の炉に溢流せしめ分については、他方の炉で還元
処理を行われ、酸化鉄を有効に回収することが出来て鉄
資源の有効な回収を行うことが出来る。(Effects of the Invention) According to the present invention, for example, when slag foamed in a smelting reduction furnace exceeds a certain value, slag is melted and reduced in order to lead it to the other furnace via a molten body communication passage. Since the thickness of the slag in the main furnace does not always exceed a certain level, oxygen injection is reliable, and melting and reduction can be carried out without wasting oxygen more than necessary. In addition to reducing the iron content in the slag, the foamed slag that overflows into the other furnace is reduced in the other furnace to effectively recover iron oxide. This makes it possible to effectively recover iron resources.
又二基上の同じ溶融還元炉を前記溶融体連絡通路で接続
した場合には、交互に切り替えて溶融還元の連続操業が
できる等価れた効果を有するものである。Furthermore, when two identical melting reduction furnaces are connected through the melt communication passage, an equivalent effect can be obtained in which continuous melting and reduction operation can be performed by switching alternately.
７゛
図面は本発明の一実施例を示した概略説明屯１は主溶融
還元炉、２は溶融体連絡通路、３は補助溶融還元炉、４
は鉄浴、５は精練スラグ、６はスラグ、７は酸素ランス
、８は出銑口、９は出滓口。
図面の浄：′２（内容（二妾更な１−）１、“１１イ′
１の表示
昭和 ６トｌ−特 許願第７０８９７号３ 補正をす
る者
ｊ件との関係特許出願人7. The drawing schematically shows an embodiment of the present invention. Figure 1 shows a main melting and reducing furnace, 2 shows a melt communication passage, 3 shows an auxiliary melting and reducing furnace, and 4
is an iron bath, 5 is a scouring slag, 6 is a slag, 7 is an oxygen lance, 8 is a tap hole, and 9 is a slag hole. Cleaning of the drawing:'2 (contents (two concubines 1-) 1, "11i"
1 Display Showa 6 Tol-Patent Application No. 70897 3 Person making the amendment Patent applicant related to the case
Claims (4)
つつ還元する溶融還元炉を複数の溶融還元炉により構成
し、該溶融還元炉炉を溶融体連絡通路を介して接続し、
複数の溶融還元炉を用いて溶融還元を行わしめることを
特徴とする溶融還元炉。(1) A smelting and reducing furnace that supplies iron ore together with coal powder and the like to an iron bath and reducing it while melting is constituted by a plurality of smelting and reducing furnaces, and the smelting and reducing furnaces are connected via a melt communication passage,
A melting reduction furnace characterized by performing melting reduction using a plurality of melting reduction furnaces.
ことを特徴とする特許請求の範囲第１項の溶融還元炉。(2) The melting reduction furnace according to claim 1, wherein the operation of a plurality of melting reduction furnaces can be switched.
溶融還元炉を発泡したスラグの還元のみを行う補助還元
炉として用いたことを特徴とする特許請求の範囲第１項
の溶融還元炉。(3) A part of the plurality of smelting reduction furnaces is used as a main reduction furnace, and the remaining smelting reduction furnaces are used as auxiliary reduction furnaces that only reduce foamed slag. Melting reduction furnace.
したことを特徴とする特許請求の範囲第１項の溶融還元
炉。(4) The melting reduction furnace according to claim 1, characterized in that a plurality of rows of melting reduction furnaces are provided and the operation is enabled by switching between them.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP7089786A JPS62228420A (en) | 1986-03-31 | 1986-03-31 | Melting and reducing furnace |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP7089786A JPS62228420A (en) | 1986-03-31 | 1986-03-31 | Melting and reducing furnace |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| JPS62228420A true JPS62228420A (en) | 1987-10-07 |
Family
ID=13444780
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP7089786A Pending JPS62228420A (en) | 1986-03-31 | 1986-03-31 | Melting and reducing furnace |
Country Status (1)
| Country | Link |
|---|---|
| JP (1) | JPS62228420A (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| EP0629710A1 (en) * | 1993-06-15 | 1994-12-21 | MANNESMANN Aktiengesellschaft | Process and installation for reduction of ores or prereduced metal-bearing products in molten state |
-
1986
- 1986-03-31 JP JP7089786A patent/JPS62228420A/en active Pending
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| EP0629710A1 (en) * | 1993-06-15 | 1994-12-21 | MANNESMANN Aktiengesellschaft | Process and installation for reduction of ores or prereduced metal-bearing products in molten state |
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