JPH0488107A - Method for preventing crack on lining in converter - Google Patents
Method for preventing crack on lining in converterInfo
- Publication number
- JPH0488107A JPH0488107A JP20220190A JP20220190A JPH0488107A JP H0488107 A JPH0488107 A JP H0488107A JP 20220190 A JP20220190 A JP 20220190A JP 20220190 A JP20220190 A JP 20220190A JP H0488107 A JPH0488107 A JP H0488107A
- Authority
- JP
- Japan
- Prior art keywords
- converter
- refining
- lining
- present
- time
- 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
- 238000000034 method Methods 0.000 title claims description 16
- 238000007670 refining Methods 0.000 claims abstract description 24
- 229910000831 Steel Inorganic materials 0.000 claims abstract description 12
- 239000010959 steel Substances 0.000 claims abstract description 12
- 239000002184 metal Substances 0.000 claims description 12
- 238000010079 rubber tapping Methods 0.000 abstract description 6
- 239000002994 raw material Substances 0.000 abstract description 4
- QVGXLLKOCUKJST-UHFFFAOYSA-N atomic oxygen Chemical compound [O] QVGXLLKOCUKJST-UHFFFAOYSA-N 0.000 abstract description 2
- 229910052760 oxygen Inorganic materials 0.000 abstract description 2
- 239000001301 oxygen Substances 0.000 abstract description 2
- XEEYBQQBJWHFJM-UHFFFAOYSA-N Iron Chemical compound [Fe] XEEYBQQBJWHFJM-UHFFFAOYSA-N 0.000 abstract 6
- 229910052742 iron Inorganic materials 0.000 abstract 3
- 238000010586 diagram Methods 0.000 description 9
- 230000008439 repair process Effects 0.000 description 7
- 230000035939 shock Effects 0.000 description 6
- 238000007796 conventional method Methods 0.000 description 3
- 230000036760 body temperature Effects 0.000 description 2
- 230000007423 decrease Effects 0.000 description 2
- 238000010438 heat treatment Methods 0.000 description 2
- 238000004519 manufacturing process Methods 0.000 description 2
- 210000004894 snout Anatomy 0.000 description 2
- 235000000177 Indigofera tinctoria Nutrition 0.000 description 1
- 239000011449 brick Substances 0.000 description 1
- 238000001816 cooling Methods 0.000 description 1
- 230000000694 effects Effects 0.000 description 1
- 238000005516 engineering process Methods 0.000 description 1
- 239000007789 gas Substances 0.000 description 1
- 229940097275 indigo Drugs 0.000 description 1
- COHYTHOBJLSHDF-UHFFFAOYSA-N indigo powder Natural products N1C2=CC=CC=C2C(=O)C1=C1C(=O)C2=CC=CC=C2N1 COHYTHOBJLSHDF-UHFFFAOYSA-N 0.000 description 1
- 239000000203 mixture Substances 0.000 description 1
- 238000002360 preparation method Methods 0.000 description 1
- 230000005855 radiation Effects 0.000 description 1
- 238000011084 recovery Methods 0.000 description 1
- 230000000717 retained effect Effects 0.000 description 1
- 238000005070 sampling Methods 0.000 description 1
- 238000004904 shortening Methods 0.000 description 1
- 239000002893 slag Substances 0.000 description 1
- 238000009628 steelmaking Methods 0.000 description 1
Landscapes
- Carbon Steel Or Casting Steel Manufacturing (AREA)
Abstract
Description
【発明の詳細な説明】
［産業上の利用分野］
本発明は転炉内張りの亀裂防止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 preventing cracks in a converter lining.
［従来の技術］
転炉による精錬操業は、一つの転炉を繰返し用いて行な
われている。この場合、各工程間のスケジュール調整、
転炉炉体の局部補修、出鋼口の取替え補修等によって、
一つのチャージの精錬が終わり、出鋼して、次のチャー
ジの精錬を開始するまでに、転炉の待ち時間を生じてい
る。この待ち時間中、上述した転炉炉体の局部補修、出
鋼口の取替え補修等が行なわれる。この間炉を空にした
状態になっているので、保熱手段として、出来るだけ藍
をして放熱を防止している。[Prior Art] Refining operations using a converter are performed using one converter repeatedly. In this case, schedule adjustment between each process,
Through local repairs to the converter furnace body, replacement and repair of the tapping port, etc.
There is a waiting time in the converter until the refining of one charge is finished, the steel is tapped, and the refining of the next charge is started. During this waiting time, the above-mentioned local repairs of the converter furnace body, replacement and repair of the tapping port, etc. are performed. During this time, the furnace was left empty, so as a means of heat retention, we used as much indigo as possible to prevent heat radiation.
［発明が解決しようとする課題］
しかしながら、上述した転炉炉体の局部補修、出鋼口の
取替え補修等については、技術が進歩し、補修等の回数
が少なくなり、各工程間のスケジュール調整等に起因し
た待ち時間の割合が多くなっている。この間炉を空にし
た状態になっているので、上述した保熱手段では転炉の
待ち時問いかんによっては保熱が不充分となり、炉体が
冷却するという問題がある。[Problem to be solved by the invention] However, with regard to the above-mentioned local repairs of the converter furnace body, replacement and repair of the tapping port, etc., as technology advances, the number of repairs, etc. is reduced, and schedule adjustment between each process is required. The proportion of waiting time due to such factors is increasing. During this time, the furnace is in an empty state, so there is a problem that the heat retention means described above may not be sufficient to retain heat depending on what happens when the converter is waiting, and the furnace body may cool down.
このような加熱、冷却、加熱の繰返しが重なると、炉体
は一般にＭｇ０−Ｃ等の煉瓦で内張すされているので、
炉体内張りが熱ショックによる亀裂を生じて、炉体の寿
命を短しかくする。When such heating, cooling, and heating are repeated, the furnace body is generally lined with bricks made of Mg0-C, etc.
The inner lining of the furnace will crack due to thermal shock, shortening the life of the furnace.
本発明者等は上記のような問題点の解決を図ったもので
あり、各工程間のスゲジュール調整等の転炉の待ち時間
があっても、炉体内張りに熱ショックによる亀裂を生じ
ない転炉内張りの亀裂防止方法を提供することを目的と
する。The present inventors have attempted to solve the above problems, and have developed a converter that does not cause cracks in the lining of the furnace due to thermal shock, even if there is waiting time for the converter such as schedule adjustment between each process. The purpose of the present invention is to provide a method for preventing cracks in a furnace lining.
［課題を解決するための手段］
上記目的を達成するために、本発明は転炉を繰返し用い
て精錬操業するにあたり、一つのチャンの精錬が終わり
、出鋼して、次のチャージの精錬を開始するまでの転炉
の待ち時間を、前記転炉内に必要な溶銑を装入した状態
で待機させる転炉内張りの亀裂防止方法とするものであ
る。[Means for Solving the Problems] In order to achieve the above object, the present invention provides a method for refining operations using a converter repeatedly, when the refining of one chang is completed, the steel is tapped, and the refining of the next charge is started. This is a method for preventing cracks in the lining of the converter by waiting for the converter to start while the necessary hot metal is charged into the converter.
［作用］
本発明は一つのチャージの精錬が終わり、出鋼したら、
すぐに次のチャージの溶銑を装入するので、溶銑の保有
熱により、炉体内張りの温度は保持され、熱ショックを
生じない。[Function] In the present invention, once the refining of one charge is completed and the steel is tapped,
Since the next charge of hot metal is charged immediately, the temperature inside the furnace is maintained by the retained heat of the hot metal, and no thermal shock occurs.
［実施例］ 以下に本発明を図によって説明する。[Example] The present invention will be explained below using figures.
第１図（ａ）、（ｂ）、（Ｃ）は本発明の一実施例を示
す図である。（ａ）図は転炉の精錬状態を示す図、（ｂ
）図は転炉の出鋼状態・を示す図、（Ｃ）図は転炉の待
機状態を示す図である。図において、１は溶銑、２は溶
鋼、３は転炉炉体、４は耐火物の内張りである。取鍋６
は矢印の方向に移動出来る。７は排ガス回収ダクト、８
は可動式スナウトである。FIGS. 1(a), (b), and (C) are diagrams showing one embodiment of the present invention. (a) Figure shows the refining state of the converter, (b)
) is a diagram showing the steel tapping state of the converter, and Figure (C) is a diagram showing the standby state of the converter. In the figure, 1 is hot metal, 2 is molten steel, 3 is a converter furnace body, and 4 is a refractory lining. Ladle 6
can move in the direction of the arrow. 7 is an exhaust gas recovery duct, 8
is a movable snout.
本発明の方法は転炉３を繰返し用いて精錬操業するにあ
たり、（ａ）図に示すように、転炉炉体３内に溶銑１等
の原料を装入して、ランス５により、酸素を吹込んで、
精錬を行なう、このような一つのチャージの精錬が終わ
ると、（ｂ）図に示すように、転炉炉体３をトラニオン
により傾動して、取鍋６に溶鋼２を出鋼する。次のチャ
ージの精錬を開始するまでの転炉の待ち時間を、（Ｃ）
図に示すように転炉炉体３内に必要な溶銑１を装入した
状態で待機させる。可動式スナウト８は溶銑装入のなめ
に、移動しているので、ここでは２点鎖線で示している
。In the method of the present invention, when performing refining operations using the converter 3 repeatedly, raw materials such as hot metal 1 are charged into the converter body 3 and oxygen is removed by the lance 5, as shown in Figure (a). Inhale,
When the refining of one charge is completed, the converter body 3 is tilted by the trunnion to tap the molten steel 2 into the ladle 6, as shown in FIG. The waiting time of the converter until it starts refining the next charge is (C)
As shown in the figure, the necessary hot metal 1 is charged into the converter furnace body 3 and is kept on standby. Since the movable snout 8 is moving during the charging of hot metal, it is shown here with a chain double-dashed line.
第２図は本発明の方法による精錬サイクル時間と転炉炉
体の温度との関係を示す図である。精錬時間（Ｂ）は１
５〜２０分間行なわれ、その後、サンプリングして、成
分調整等が行なわれ、出鋼、排滓が行なわれる。この後
、転炉炉体は原料等を装入していない空の状態として、
従来方法では１５〜３０分存在していたが、本発明の方
法では直ぐに必要な溶銑を装入するものである。ここで
の処理待ち時間（Ａ）は原料等の装入準備も含む非製鋼
時間を示す。FIG. 2 is a diagram showing the relationship between the refining cycle time and the temperature of the converter body according to the method of the present invention. Refining time (B) is 1
This is carried out for 5 to 20 minutes, after which sampling is performed, composition adjustment, etc. are carried out, and tapping and slag are carried out. After this, the converter furnace body is assumed to be in an empty state without charging raw materials, etc.
In the conventional method, the hot metal was present for 15 to 30 minutes, but in the method of the present invention, the necessary hot metal is charged immediately. The processing waiting time (A) here indicates the non-steel manufacturing time including preparation for charging raw materials and the like.
炉体温度は従来方法では点線９の温度曲線で示されるよ
うに、８００℃程度まで低下するのに対して、本発明方
法では実線１０の温度曲線で示されるように、１３００
℃程度に保持することが出来る。In the conventional method, the furnace body temperature drops to about 800°C, as shown by the temperature curve of dotted line 9, whereas in the method of the present invention, it drops to about 1300°C, as shown by the temperature curve of solid line 10.
It can be maintained at around ℃.
第３図は処理待ち時間（Ａ） （非製鋼時間）が４０分
以上を要したチャージの割合と炉体寿命の関係を示した
図である８点線で示した従来方法の場合は、４０分以上
を要したチャージの割合が多くなるに従い、急速に炉体
寿命が低下することがわかる。炉体寿命の低下は熱ショ
ックに起因した内張りの亀裂による。Figure 3 is a diagram showing the relationship between the proportion of charges that required processing waiting time (A) (non-steel manufacturing time) of 40 minutes or more and the life of the furnace body.In the case of the conventional method shown by the 8-dotted line, It can be seen that as the proportion of charges requiring the above increases, the life of the furnace body decreases rapidly. The decrease in furnace life is due to cracks in the lining caused by thermal shock.
これに対して、本発明方法では４０分以上を要したチャ
ージの割合が多くなっても、炉体寿命は変わらない、こ
こにおいてＯはＡ転炉、・はＢ転炉の場合を示す。On the other hand, in the method of the present invention, even if the proportion of charging that took 40 minutes or more increases, the life of the furnace body does not change. Here, O indicates the case of the A converter, and . indicates the case of the B converter.
図から明らかなように、本発明方法によれば、熱ショッ
クに起因した内張りの亀裂が生じないので、転炉炉体の
寿命が延長出来たものである。As is clear from the figure, according to the method of the present invention, cracks in the lining caused by thermal shock do not occur, so the life of the converter body can be extended.
［発明の効果］
本発明によれば、転炉炉体の保熱を溶銑に求めた簡単な
方法によって、熱ショックに起因した内張りの亀裂を防
止し、転炉炉体の寿命を延長することが出来る。[Effects of the Invention] According to the present invention, cracks in the lining caused by thermal shock can be prevented and the life of the converter furnace body can be extended by a simple method that uses hot metal to retain heat in the converter furnace body. I can do it.
第１図は本発明の一実施例を示す図、第２図は本発明の
精錬サイクルと炉体温度との関係を示す図、第３図は本
発明による炉体寿命と処理待ち時間〈非製鋼時間〉のｒ
ｌＩＪ係を示す図である。
１・・・溶銑、２・・・溶鋼、３・・・転炉炉体、４・
・・耐火物の内張り。FIG. 1 is a diagram showing an embodiment of the present invention, FIG. 2 is a diagram showing the relationship between the refining cycle and furnace body temperature of the present invention, and FIG. 3 is a diagram showing the relationship between the furnace body life and processing waiting time according to the present invention. steelmaking time〉r
It is a diagram showing the lIJ section. 1... Hot metal, 2... Molten steel, 3... Converter furnace body, 4...
...Refractory lining.
Claims (1)
ージの精錬が終わり、出鋼して、次のチャージの精錬を
開始するまでの転炉の待ち時間を、前記転炉内に溶銑を
装入した状態で待機させることを特徴とした転炉内張り
の亀裂防止方法。In refining operations using a converter repeatedly, the waiting time of the converter until the refining of one charge is finished, the steel is tapped, and the refining of the next charge is started is the time required to charge hot metal into the converter. A method for preventing cracks in the lining of a converter, characterized by making the converter stand by in a closed state.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP20220190A JPH0488107A (en) | 1990-07-30 | 1990-07-30 | Method for preventing crack on lining in converter |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP20220190A JPH0488107A (en) | 1990-07-30 | 1990-07-30 | Method for preventing crack on lining in converter |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| JPH0488107A true JPH0488107A (en) | 1992-03-23 |
Family
ID=16453641
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP20220190A Pending JPH0488107A (en) | 1990-07-30 | 1990-07-30 | Method for preventing crack on lining in converter |
Country Status (1)
| Country | Link |
|---|---|
| JP (1) | JPH0488107A (en) |
-
1990
- 1990-07-30 JP JP20220190A patent/JPH0488107A/en active Pending
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