JPH01150792A - Slag removing method in pig iron receiving vessel - Google Patents
Slag removing method in pig iron receiving vesselInfo
- Publication number
- JPH01150792A JPH01150792A JP62309597A JP30959787A JPH01150792A JP H01150792 A JPH01150792 A JP H01150792A JP 62309597 A JP62309597 A JP 62309597A JP 30959787 A JP30959787 A JP 30959787A JP H01150792 A JPH01150792 A JP H01150792A
- Authority
- JP
- Japan
- Prior art keywords
- slag
- pig
- hot metal
- pig iron
- slug
- 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
- 239000002893 slag Substances 0.000 title claims abstract description 46
- 229910000805 Pig iron Inorganic materials 0.000 title claims description 19
- 238000000034 method Methods 0.000 title claims description 17
- 230000001590 oxidative effect Effects 0.000 claims abstract description 9
- 239000002184 metal Substances 0.000 claims description 31
- 229910052751 metal Inorganic materials 0.000 claims description 31
- 238000007599 discharging Methods 0.000 claims description 6
- 238000007664 blowing Methods 0.000 abstract description 10
- 239000007789 gas Substances 0.000 description 14
- XEEYBQQBJWHFJM-UHFFFAOYSA-N Iron Chemical compound [Fe] XEEYBQQBJWHFJM-UHFFFAOYSA-N 0.000 description 8
- QVGXLLKOCUKJST-UHFFFAOYSA-N atomic oxygen Chemical compound [O] QVGXLLKOCUKJST-UHFFFAOYSA-N 0.000 description 5
- 238000010586 diagram Methods 0.000 description 5
- 230000000694 effects Effects 0.000 description 5
- 239000001301 oxygen Substances 0.000 description 5
- 229910052760 oxygen Inorganic materials 0.000 description 5
- XUIMIQQOPSSXEZ-UHFFFAOYSA-N Silicon Chemical compound [Si] XUIMIQQOPSSXEZ-UHFFFAOYSA-N 0.000 description 4
- 229910052742 iron Inorganic materials 0.000 description 4
- 229910052710 silicon Inorganic materials 0.000 description 4
- 239000010703 silicon Substances 0.000 description 4
- 238000011282 treatment Methods 0.000 description 4
- 238000007796 conventional method Methods 0.000 description 2
- 238000003780 insertion Methods 0.000 description 2
- 230000037431 insertion Effects 0.000 description 2
- MYMOFIZGZYHOMD-UHFFFAOYSA-N Dioxygen Chemical compound O=O MYMOFIZGZYHOMD-UHFFFAOYSA-N 0.000 description 1
- 229910000831 Steel Inorganic materials 0.000 description 1
- 238000006477 desulfuration reaction Methods 0.000 description 1
- 230000023556 desulfurization Effects 0.000 description 1
- 230000006866 deterioration Effects 0.000 description 1
- 239000012528 membrane Substances 0.000 description 1
- 238000002203 pretreatment Methods 0.000 description 1
- 239000010959 steel Substances 0.000 description 1
- 239000002699 waste material Substances 0.000 description 1
Classifications
-
- Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
- Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
- Y02P—CLIMATE CHANGE MITIGATION TECHNOLOGIES IN THE PRODUCTION OR PROCESSING OF GOODS
- Y02P10/00—Technologies related to metal processing
- Y02P10/20—Recycling
Landscapes
- Refinement Of Pig-Iron, Manufacture Of Cast Iron, And Steel Manufacture Other Than In Revolving Furnaces (AREA)
- Furnace Charging Or Discharging (AREA)
Abstract
Description
【発明の詳細な説明】
（産業上の利用分野）
本発明は受銑容器内のスラグ除去方法に関するものであ
る。DETAILED DESCRIPTION OF THE INVENTION (Industrial Field of Application) The present invention relates to a method for removing slag in an iron receiving vessel.
（従来の技術）
溶銑予備処理工程に於いて、発生するスラグは溶銑の脱
珪、脱膜、脱硫処理等にエフ生成した種種の成分を有す
るスラグで、随時その目的忙応じて排出されているのが
普通でろって、予備処理方法の多様化に従い、その発生
量、流動性は一定で無く、また、受銑容器の形状等の制
約から、このスラグの排出性は不十分な状態でるる。そ
して、この受銑容器内に残存するスラグは、次工程での
処理率の低下、溶銑品質の悪化等を誘発する。(Prior art) In the hot metal pretreatment process, the slag generated is a slag containing various components generated during the desiliconization, film removal, and desulfurization treatments of the hot metal, and is discharged at any time depending on the purpose. However, due to the diversification of pretreatment methods, the amount of slag generated and its fluidity are not constant, and due to constraints such as the shape of the pig iron receiving container, the discharge performance of this slag is insufficient. . The slag remaining in the pig iron receiving container causes a reduction in the processing rate in the next process and a deterioration in the quality of the hot metal.
したがって、このスラグ排出作業は溶銑予備処理プロセ
スでの処理効率の向上、溶銑品質の確保の上からも、よ
り完全な排出を可能とする方法が必要である〇
従来、受銑容器内のスラグ除去方法に関しては、例えば
実開昭５６−９５５６６号公報、実開昭５６−９５５６
７号公報に開示されているように、ドラッガー等を用い
て機械的にスラグを排出する方法やスラグを吸引するこ
とにより除去する方法が採用されているが、その排出は
十分とは匹えず残存スラグは相当量あることが確認され
ている。Therefore, this slag discharge work requires a method that enables more complete discharge from the standpoint of improving processing efficiency in the hot metal pretreatment process and ensuring hot metal quality. Regarding the method, for example, Japanese Utility Model Application Publication No. 56-95566, Japanese Utility Model Application Publication No. 56-9556
As disclosed in Publication No. 7, a method of mechanically discharging slag using a dragger or the like and a method of removing slag by suction have been adopted, but the discharge is not sufficient. It has been confirmed that there is a considerable amount of residual slag.
（発明が解決しようとする問題点）
すなわち、受銑容器内のスラグをドラッガ等を用いて、
機械的に排出する作業に於いて、スラグの流動性が悪い
場合や、受銑容器が混銑車の様に、奥行きが深い場合に
は、スラグの排滓性は著しく低下し、次工程で実施され
る脱膜処理に悪影響を与えると同時に、スラグ排出時に
受銑容器内の溶銑金一部排出してしまうという欠点を有
している。(Problem to be solved by the invention) In other words, the slag in the pig iron receiving container is removed using a dragger or the like.
When mechanically discharging slag, if the fluidity of the slag is poor or if the receiving container is deep, such as in an iron mixer, the slag discharging performance will be significantly reduced, and it may be necessary to remove the slag in the next process. This method has the disadvantage that it has a negative effect on the membrane removal treatment performed, and at the same time, a portion of the molten metal in the pig iron receiving container is discharged when the slag is discharged.
また、溶銑の脱膜処理の安定化を考えると溶銑中の珪素
濃度は低い方が好ましいが、例えば高炉鋳床での脱珪能
力には限界がめつ友り、また受銑容器内での脱珪処理に
も高脱珪を狙うために、処理に時間がかかり、生産性の
低下といった問題がめる。In addition, considering the stability of the hot metal defilming process, it is preferable that the silicon concentration in the hot metal be low, but there is a limit to the silicon concentration in the blast furnace cast bed, for example, and the silicon concentration in the pig iron receiving vessel is limited. Since the treatment aims to achieve a high degree of silicon removal, the treatment takes time, leading to problems such as a decrease in productivity.
（問題点を解決するための手段）
本発明は、上記従来方法による問題点を有利に解決し九
スラグ除去方法を提供せんとするものでるり、その要旨
は、受銑容器内の溶銑に酸化性ガスを供給しつつ溶銑上
に浮遊するスラグの排出を行うこと′ｔ″特徴とする受
銑容器内のスラグ除去方法である。(Means for Solving the Problems) The present invention aims to advantageously solve the problems of the above-mentioned conventional methods and provide a method for removing slag. This is a method for removing slag in a pig iron receiving vessel, which is characterized by discharging slag floating on hot metal while supplying hot metal gas.
以下図面に基づいて本発明を説明する。The present invention will be explained below based on the drawings.
第１図は本発明を例示する説明図である。本発明は第１
図に示すように、混銑車１内に収容した溶銑上に浮遊す
るスラグ５を、混銑車１を傾動させてドラッガー４によ
り掻き出す際に、該混銑車１の上面鉄皮を貫通して設け
たパイプ挿入孔２゜２を介してガス吹込用パイプ３，３
をその先端が溶銑中に浸漬するように挿入するとともに
、これらのパイプ３，３を介して酸化性ガス、例えば空
気を吹き込んでスラグの流動性を良好ならしめることを
特徴とする。FIG. 1 is an explanatory diagram illustrating the present invention. The present invention is the first
As shown in the figure, when the slag 5 floating on the hot metal contained in the pig iron mixer car 1 is scraped out by the dragger 4 by tilting the pig iron mixer car 1, the iron skin of the top surface of the pig iron mixer car 1 is penetrated and provided. Gas blowing pipes 3, 3 are inserted through the pipe insertion hole 2゜2.
is inserted so that its tip is immersed in hot metal, and an oxidizing gas such as air is blown through these pipes 3, 3 to improve the fluidity of the slag.
第２図は本発明の別の実施例金示す図で、溶銑鍋６に収
容した溶銑上に浮遊するスラグ５をドラッガー４にエフ
掻き出す際、ガス吹込用パイプ３゜３を介して酸化性ガ
スを溶銑中に吹き込むことにょリスラグの流動性を向上
させたものである。第３図は本発明の更に別の実施例を
示す図であって、混銑車１の上面中央部に設けられた開
ロア″ｆ：介して末広がりとした２本のガス吹込用パイ
プ３Ａ 。FIG. 2 shows another embodiment of the present invention, in which when the slag 5 floating on the hot metal contained in the hot metal ladle 6 is scraped out by the dragger 4, oxidizing gas is passed through the gas blowing pipe 3. The fluidity of the slag is improved by injecting it into the hot metal. FIG. 3 is a diagram showing still another embodiment of the present invention, in which two gas blowing pipes 3A are widened toward each other through an open lower "f" provided at the center of the upper surface of the pig iron mixer 1.
３Ｂ ？介して混銑車１の溶銑中に酸化性ガスを吹き
込みつつ該パイプ３Ａ 、 ３Ｂの中央部に形成された
空間全利用してドラッガー４によ！ｌｌｉ＠銑上に浮遊
するスラグ５の排出を行うものである。なお、本発明に
おいて、酸化性ガスの酸素濃度は２０％以上とするのが
よく、この値が２０％未満ではスラグの流動性を向上さ
せる効果が顕著でなく、溶銑中のＳｔ ｆ低減させる
効果も少い。3B? While blowing oxidizing gas into the hot metal of the pig iron mixer 1 through the dragger 4, the entire space formed in the center of the pipes 3A and 3B is used! lli@This is to discharge the slag 5 floating on the pig iron. In the present invention, the oxygen concentration of the oxidizing gas is preferably 20% or more; if this value is less than 20%, the effect of improving the fluidity of slag will not be significant, and the effect of reducing St f in hot metal will not be significant. There are also few.
該カス中の酸素濃度の上限は１００％でろって工いが、
経済的な面からは工業的に容易に得られる純酸素の酸素
濃度までとするのが有効でめり、被処理スラグの性状及
び被処理溶銑のＳｉ 含有量に基づいて該ガス中の酸素
濃度は任意に設定することができる。The upper limit of the oxygen concentration in the waste is 100%, but
From an economic point of view, it is effective to keep the oxygen concentration up to the level of pure oxygen that can be easily obtained industrially, and the oxygen concentration in the gas is determined based on the properties of the slag to be treated and the Si content of the hot metal to be treated. can be set arbitrarily.
（作用）
スラグ排出中、溶銑に酸化性ガスを吹き込むことにより
スラグの流動性を高め、溶銑温度を低下することなく溶
銑中のＳｔ 含有量を低減させ得るので、スラグの排出
をスムーズに行うことができると共に、残存スラグ量を
少くすることが可能でめる。また溶銑中のＳｔ 含有量
に応じてガス中の酸素濃度を調整するようにすれば、排
滓中に溶銑のＳｌ 含有量を所定の値まで低減させるこ
とも可能でるる。(Function) During slag discharge, by blowing oxidizing gas into the hot metal, the fluidity of the slag can be increased and the St content in the hot metal can be reduced without lowering the hot metal temperature, so that the slag can be discharged smoothly. At the same time, it is possible to reduce the amount of residual slag. Further, by adjusting the oxygen concentration in the gas according to the St 2 content in the hot metal, it is possible to reduce the Sl 2 content of the hot metal to a predetermined value during the slag.
（実施例） ３００ を収容可能な混銑車で本発明方法を実施し念。(Example) The method of the present invention was carried out on a mixed iron truck capable of accommodating 300 ml.
その時の条件は以下のとおりでろる。The conditions at that time are as follows.
収容溶銑量（ｔ） ： ２７０
排出前スラグ量（ｔ） ： １２溶銑温度（’
Ｃ） ： １３８０吹込ガス成分（％）＝０２
２Ｏ
吹込ガスｉ（Ｎｍ’／ｍ１ｎ）：２０
吹込時間（ｍｉｎ） ： ２０吹込パイプ内径
（朋）；２０
以上の条件で本発明を実施し几結果、スラグ排出後の混
銑車内に残留し念スラグのスラグ厚が１５ｍｍＶＣまで
低減することが出来た。比較のために同様の条件で酸化
性ガスの供給を行わなかつｔ従来法では、スラグ排出後
の混銑車内スラグ厚は４０ｉ罵でめった。Amount of hot metal accommodated (t): 270 Amount of slag before discharge (t): 12 Hot metal temperature ('
C): 1380 Blowing gas component (%) = 02
2O Blowing gas i (Nm'/m1n): 20 Blowing time (min): 20 Blowing pipe inner diameter (home): 20 The present invention was carried out under the above conditions, and as a result, it was found that no slag remained in the pig iron mixer car after slag was discharged. It was possible to reduce the slag thickness to 15mmVC. For comparison, under the same conditions without supplying oxidizing gas and using the conventional method, the thickness of the slag inside the mixed pig iron car after slag discharge was 40 mm.
（発明の効果）
以上述べたとおジ、本発明によれば混銑車等に収容した
溶銑上に浮遊するスラグを排出する際、残存スラグを著
しく低減することが可能でめり、更にはスラグ排出中に
溶銑中の８１ 含有率の低減も可能であるから溶銑予
備処理プロセス全体の効率を向上させ、コストダウンを
計るうえで顕著な効果を奏する。(Effects of the Invention) As described above, according to the present invention, when discharging slag floating on hot metal contained in a pig iron mixer car, etc., it is possible to significantly reduce the remaining slag, and furthermore, the slag can be discharged. Since it is also possible to reduce the content of 81 in the hot metal, it improves the efficiency of the entire hot metal pretreatment process and has a significant effect in reducing costs.
第１図は本発明全例示する説明図、第２図は不発明の別
の実施例を示す説明図、第３図は本発明の更に別の実施
例を示す説明図である。
１は混銑車、２はパイプ挿入孔、３ 、３Ａ 、 ３Ｂ
はパイプ、４はドラッガー、５はスラグ、６は溶銑鍋、
７は開口。
特許 出願人 新日本製鉄株式会社
ヤ／図
ヤ２図FIG. 1 is an explanatory diagram showing the entire embodiment of the present invention, FIG. 2 is an explanatory diagram showing another embodiment of the present invention, and FIG. 3 is an explanatory diagram showing still another embodiment of the present invention. 1 is the pig iron mixing car, 2 is the pipe insertion hole, 3, 3A, 3B
is a pipe, 4 is a dragger, 5 is a slag, 6 is a hot metal pot,
7 is an opening. Patent Applicant: Nippon Steel Corporation
Claims (1)
遊するスラグの排出を行うことを特徴とする受銑容器内
のスラグ除去方法。A method for removing slag in a pig iron receiving container, which comprises discharging slag floating on top of the hot metal while supplying an oxidizing gas to the hot metal in the pig iron receiving container.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP62309597A JPH01150792A (en) | 1987-12-09 | 1987-12-09 | Slag removing method in pig iron receiving vessel |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP62309597A JPH01150792A (en) | 1987-12-09 | 1987-12-09 | Slag removing method in pig iron receiving vessel |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| JPH01150792A true JPH01150792A (en) | 1989-06-13 |
Family
ID=17994943
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP62309597A Pending JPH01150792A (en) | 1987-12-09 | 1987-12-09 | Slag removing method in pig iron receiving vessel |
Country Status (1)
| Country | Link |
|---|---|
| JP (1) | JPH01150792A (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN114289706A (en) * | 2021-12-31 | 2022-04-08 | 马鞍山瑞科流体科技有限公司 | Cutter head structure of slag removal device at tank opening of iron mixing vehicle |
Citations (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPS5916921A (en) * | 1982-07-16 | 1984-01-28 | Sumitomo Metal Ind Ltd | Method for removing adhered slag |
| JPS6142763A (en) * | 1984-08-02 | 1986-03-01 | Matsushita Electric Ind Co Ltd | Capstan |
-
1987
- 1987-12-09 JP JP62309597A patent/JPH01150792A/en active Pending
Patent Citations (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPS5916921A (en) * | 1982-07-16 | 1984-01-28 | Sumitomo Metal Ind Ltd | Method for removing adhered slag |
| JPS6142763A (en) * | 1984-08-02 | 1986-03-01 | Matsushita Electric Ind Co Ltd | Capstan |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN114289706A (en) * | 2021-12-31 | 2022-04-08 | 马鞍山瑞科流体科技有限公司 | Cutter head structure of slag removal device at tank opening of iron mixing vehicle |
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