JPH0238301B2 - - Google Patents
Info
- Publication number
- JPH0238301B2 JPH0238301B2 JP57040445A JP4044582A JPH0238301B2 JP H0238301 B2 JPH0238301 B2 JP H0238301B2 JP 57040445 A JP57040445 A JP 57040445A JP 4044582 A JP4044582 A JP 4044582A JP H0238301 B2 JPH0238301 B2 JP H0238301B2
- Authority
- JP
- Japan
- Prior art keywords
- tundish
- steel
- continuous casting
- molten steel
- steel type
- 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.)
- Expired - Lifetime
Links
Classifications
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B22—CASTING; POWDER METALLURGY
- B22D—CASTING OF METALS; CASTING OF OTHER SUBSTANCES BY THE SAME PROCESSES OR DEVICES
- B22D11/00—Continuous casting of metals, i.e. casting in indefinite lengths
- B22D11/10—Supplying or treating molten metal
Landscapes
- Engineering & Computer Science (AREA)
- Mechanical Engineering (AREA)
- Continuous Casting (AREA)
Description
【発明の詳細な説明】
本発明は連続鋳造装置において成分の異なつた
溶鋼を鋳造する（以下異鋼種連続鋳造と呼ぶ）方
法に関するものである。DETAILED DESCRIPTION OF THE INVENTION The present invention relates to a method of casting molten steel of different compositions in a continuous casting apparatus (hereinafter referred to as continuous casting of different steel types).
一般に、異鋼種連続鋳造を行う場合は、第１図
において取鍋１内の溶鋼５をほとんどタンデイツ
シユ２注出し、タンデイツシユ２内の溶鋼６は溶
鋼６表面のスラグ７がモールド３内の溶鋼８に混
入することを防ぐ為、タンデイツシユ２内に2.0
〜4.0ton残した状態で、取鍋１及びタンデイツシ
ユ２を新たに成分の異なつた溶鋼５の入つた取鍋
１及び空のタンデイツシユ２と交換し鋳造を再開
する方法が実施されているが、以下の欠点が挙げ
られる。 Generally, when continuous casting of different steel types is performed, most of the molten steel 5 in the ladle 1 is poured out into the tundish 2 in Fig. 1, and the molten steel 6 in the tundish 2 is mixed with slag 7 on the surface of the molten steel 6 into the molten steel 8 in the mold 3. To prevent contamination, add 2.0
A method has been implemented in which the ladle 1 and tundish 2 are replaced with a new ladle 1 containing molten steel 5 of a different composition and an empty tundish 2 with ~4.0 ton remaining, and casting is restarted. The disadvantages are:
(1) 一成分で鋳造できる最低量は取鍋１で処理さ
れる溶鋼５の最低量で制約される。一般には70
〜300ton程度である。(1) The minimum amount that can be cast with one component is limited by the minimum amount of molten steel 5 that can be processed in the ladle 1. Generally 70
~300 tons .
(2) 取鍋１及びタンデイツシユ２の交換時間を短
時間で行なう必要があるが、設備的制約が大き
い。(2) It is necessary to replace the ladle 1 and the tundish 2 in a short time, but there are major equipment constraints.
(3) 前回鋳造された溶鋼８と新しく鋳造される成
分の異つた溶鋼が混合する。(3) Previously cast molten steel 8 and newly cast molten steel with different compositions mix.
(4) タンデイツシユ２を交換する毎にタンデイツ
シユ２に残された溶鋼は屑鉄となる。(4) Every time the tundish 2 is replaced, the molten steel left in the tundish 2 becomes scrap iron.
上記(1)、(2)、(4)に対しては、現状技術では効果
的な解決策がみあたらず、上記(3)の改善策として
は、タンデイツシユ交換時に継ぎ金物と称する隔
壁冷材を投入する方法（鉄と鋼VoL67 JUNE
1981）等が知られているが、作業安全性あるいは
鋳造停止による品質への影響等の点で好ましくな
い。 Regarding (1), (2), and (4) above, no effective solutions have been found with the current technology, and as an improvement measure for (3) above, it is necessary to use bulkhead cold material called joints when replacing the tundish. How to input (Tetsu to Hagane VoL67 JUNE
1981), but it is not desirable in terms of work safety or the impact on quality due to stopping of casting.
本発明によれば、タンデイツシユ内で合金等を
添加することにより同一取鍋内の溶鋼から複数の
鋼種を造り分けることが可能であり、タンデイツ
シユ交換も不要となることから上記欠点(1)、(2)、
(4)が有利に解決できるものであり、さらに同一モ
ールドに対して鋳造毎にダミーバーを使用し間欠
的に鋳造を行うことから上記欠点(3)も解決できる
ものである。 According to the present invention, it is possible to create multiple steel types from molten steel in the same ladle by adding alloys, etc. in the tundish, and there is no need to replace the tundish. 2),
(4) can be advantageously solved, and furthermore, since casting is performed intermittently using a dummy bar for each casting in the same mold, the above-mentioned drawback (3) can also be solved.
即ち本発明の要旨とするところは「単ストラン
ド連続鋳造機において下記(a)、(b)、(c)、(d)の工程
を順次行うことを特徴とする間欠的異鋼種連続鋳
造方法。 That is, the gist of the present invention is ``a method for intermittent continuous casting of different steel types, characterized by sequentially performing the following steps (a), (b), (c), and (d) in a single-strand continuous casting machine.
(a) 鋼種Ａの溶鋼を連続鋳造してタンデイツシユ
内に溶鋼を残存させた状態でモールドへの注入
を停止し該タンデイツシユをモールド外に移動
する
(b) 鋼種Ａの鋳片を下方に引抜きダミーバーを装
入して次鋼種鋳造準備をする
(c) (a)の注入停止時期以降においてタンデイツシ
ユ内残溶鋼に合金等を添加し、又必要により溶
鋼をタンデイツシユ内に供給して鋼種Ａから鋼
種Ｂに溶製する
(d) タンデイツシユを元の位置に戻し鋼種Ｂの連
続鋳造を開始する、必要により溶鋼をタンデイ
ツシユ内に供給し鋼種Ｂの連続鋳造を継続す
る」である。(a) Continuously cast molten steel of steel type A and stop pouring into the mold with the molten steel remaining in the tundish and move the tundish out of the mold. (b) Pull out the slab of steel type A downward to form a dummy bar. (c) After the injection stop time in (a), add alloys, etc. to the remaining molten steel in the tundish, and if necessary, feed molten steel into the tundish to cast the next steel type from steel type A to steel type B. (d) Return the tundish to its original position and start continuous casting of steel type B. If necessary, feed molten steel into the tundish and continue continuous casting of steel type B.''
以下、本発明を実施例にもとづき詳細に述べ
る。 Hereinafter, the present invention will be described in detail based on examples.
第２図は本発明の実施態様例を示す図であり取
鍋１及びタンデイツシユ２各１個に対し１個のモ
ールド３を有する連続鋳造設備における例であ
る。 FIG. 2 is a diagram showing an embodiment of the present invention, and is an example of continuous casting equipment having one mold 3 for each ladle 1 and tundish 2.
今、ある鋼種Ａという鋳片４を鋳造完了したと
ころであり、タンデイツシユ２に溶鋼６を残した
ままタンデイツシユ２を移動させる。次に鋳片４
を下方に引き抜き、モールド３に次の鋼種Ｂの鋳
造準備をする為、ダミーバー９′を装入する。こ
の準備時間を利用してタンデイツシユ内溶鋼６は
含金添加物装置１５により合金等が添加され鋼種
Ａが鋼種Ｂに溶製される。 Casting of a slab 4 of a certain steel type A has just been completed, and the tundish 2 is moved with the molten steel 6 remaining in the tundish 2. Next, slab 4
is pulled downward, and a dummy bar 9' is inserted into the mold 3 in preparation for casting the next steel type B. Utilizing this preparation time, alloys and the like are added to the molten steel 6 in the tundish by the metal-containing additive device 15, and steel type A is melted into steel type B.
準備が整つたらタンデイツシユ２をもとの位置
に戻し取鍋１から溶鋼５を合金添加装置１５によ
り合金等を添加しつつタンデイツシユ２に注入
し、続いて溶鋼６はモールド３に注入され鋳造が
再開される。次の鋼種Ｃ、更にはＤ、Ｅ、Ｆ、Ｇ
…等は鋼種Ｂの場合と同様の方法で次々と間欠的
鋳造が容易にあることは、本発明技術思想の及ぶ
範囲であることは当然である（各実施例共通）。
又上述の準備時間中に溶鋼５を溶鋼６に注ぎ足す
ことも容易に可能である。 When preparations are complete, return the tundish 2 to its original position and pour the molten steel 5 from the ladle 1 into the tundish 2 while adding alloys etc. using the alloy addition device 15.Then, the molten steel 6 is poured into the mold 3 and casting begins. It will be restarted. Next steel type C, furthermore D, E, F, G
It goes without saying that intermittent casting can be easily carried out one after another in the same manner as in the case of steel type B, which is within the scope of the technical idea of the present invention (common to all embodiments).
It is also easily possible to add molten steel 5 to molten steel 6 during the above-mentioned preparation time.
第３図は、第２図に示す実施態様例においてタ
ンデイツシユ２の鋳込み口１１の周囲に湯溜り１
７を設けそこに浸漬ノズル１３を配置した例であ
る。 FIG. 3 shows a pool 1 around the pouring port 11 of the tundish 2 in the embodiment shown in FIG.
7 is provided and the immersion nozzle 13 is arranged there.
ここに湯溜り１７の形状はスラグ７の巻き込み
防止の観点から第６図（第３図の浸漬ノズル１３
の内径Ｄ：70φ、浸漬ノズル１３の流量：
3.5ton／分の場合）に示すように浸漬ノズル１３
の内径Ｄに対して溶鋼深さは2D以上、湯溜り部
巾は5D以上の形状を有することが好ましい。 Here, the shape of the hot water reservoir 17 is the same as that of the immersion nozzle 13 in FIG.
Inner diameter D: 70φ, flow rate of immersion nozzle 13:
3.5ton/min) as shown in the immersion nozzle 13
It is preferable that the molten steel depth is 2D or more and the pool width is 5D or more with respect to the inner diameter D.
溶鋼５を注入しつつ溶鋼６に合金加装置１５に
より合金等を添加する時及び溶鋼６に合金添加装
置１５により合金等を添加する時にポーラスレン
ガ１２よりアルゴンガスを吹き込みバブリングを
行なえば溶鋼撹拌力が増大され成分がより均一化
できる。 When adding an alloy etc. to the molten steel 6 by the alloy processing device 15 while pouring the molten steel 5, and when adding an alloy etc. to the molten steel 6 by the alloy addition device 15, if argon gas is blown through the porous brick 12 and bubbling is performed, the molten steel stirring power can be increased. is increased and the components can be made more uniform.
第４図、第５図に示す実施態様例は、第２図、
第３図に示す実施態様例におけるタンデイツシユ
２の周囲あるいは湯溜り１７の周囲に高周波加熱
装置１６を設置した例である。 The embodiment examples shown in FIGS. 4 and 5 are as shown in FIG.
This is an example in which a high frequency heating device 16 is installed around the tundish 2 or around the hot water pool 17 in the embodiment shown in FIG.
高周波加熱装置１６の設置により合金等の溶解
熱を溶鋼５の顕熱に頼ることなく溶解しうる利点
がある。 The installation of the high frequency heating device 16 has the advantage that the heat of melting the alloy etc. can be used to melt the metal without depending on the sensible heat of the molten steel 5.
第１図は従来の異鋼種連続鋳造方法を示す図、
第２図は本発明の異鋼種連続鋳造方法を示す図、
第３図は本発明の異鋼種連続鋳造方法の別の実施
例を示す。第４図イ，ロ，ハ及び第５図イ，ロ，
ハは本発明の異鋼種連続鋳造方法における高周波
加熱装置を示す図、第６図イ，ロは湯溜り形状と
スラグ巻込みの関係を示す図である。
１：取鍋、２：タンデイツシユ、３：モール
ド、４：鋳片、５：溶鋼、６：溶鋼、７：スラ
グ、８：溶鋼、９：ダミーバー、１１：鋳込み
口、１２：ポーラスレンガ、１５：合金添加装
置、１６：高周波加熱装置。
Figure 1 shows the conventional continuous casting method for different steel types.
Fig. 2 is a diagram showing the continuous casting method of different steel types of the present invention;
FIG. 3 shows another embodiment of the method for continuous casting of different steel types according to the present invention. Figure 4 A, B, C and Figure 5 A, B,
FIG. 6A and FIG. 6B are diagrams showing the relationship between the pool shape and slag entrainment. 1: ladle, 2: tundish, 3: mold, 4: slab, 5: molten steel, 6: molten steel, 7: slag, 8: molten steel, 9: dummy bar, 11: pouring port, 12: porous brick, 15: Alloy addition device, 16: High frequency heating device.
Claims (1)
(b)、(c)、(d)の工程を順次行うことを特徴とする間
欠的異鋼種連続鋳造方法。 (a) 鋼種Ａの溶鋼を連続鋳造しタンデイツシユ内
に溶鋼を残存させた状態でモールドへの注入を
停止し該タンデイツシユをモールド外に移動す
る (b) 鋼種Ａの鋳片を下方に引抜きダミーバーを装
入して次鋼種鋳造準備をする (c) (a)の注入停止時期以降においてタンデイツシ
ユ内残溶鋼に合金等を添加し、又必要により溶
鋼をタンデイツシユ内に供給して鋼種Ａから鋼
種Ｂに溶製する (d) タンデイツシユを元の位置に戻し鋼種Ｂの連
続鋳造を開始する、必要により溶鋼をタンデイ
ツシユ内に供給し鋼種Ｂの連続鋳造を継続する ２ タンデイツシユ底部の鋳込み口周囲に湯溜り
部を設けたことを特徴とする特許請求の範囲第１
項記載の異鋼種連続鋳造方法。 ３ タンデイツシユ周囲にタンデイツシユ内溶鋼
加熱装置を有することを特徴とする特許請求の範
囲第１項記載の異鋼種連続鋳造方法。 ４ 湯溜り部に不活性ガス吹込み装置を配設する
ことを特徴とする特許請求の範囲第１項記載の異
鋼種連続鋳造方法。[Claims] 1. In a single strand continuous casting machine, the following (a):
An intermittent continuous casting method for different steel types, characterized by sequentially performing the steps (b), (c), and (d). (a) Continuously cast molten steel of steel type A, stop pouring into the mold with the molten steel remaining in the tundish, and move the tundish out of the mold. (b) Pull out the slab of steel type A downward and install a dummy bar. Charge and prepare for casting of the next steel type (c) After the injection stop time in (a), add alloys, etc. to the remaining molten steel in the tundish, and if necessary, feed molten steel into the tundish to change steel type A to steel type B. Melt (d) Return the tundish to its original position and start continuous casting of steel type B. If necessary, feed molten steel into the tundish to continue continuous casting of steel type B. 2 Create a pool around the pouring port at the bottom of the tundish. Claim 1 characterized in that
Continuous casting method for different steel types as described in section. 3. The continuous casting method for different steel types according to claim 1, further comprising a tundish internal molten steel heating device around the tundish. 4. The continuous casting method for different steel types according to claim 1, characterized in that an inert gas blowing device is disposed in the sump.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP4044582A JPS58157556A (en) | 1982-03-15 | 1982-03-15 | Continuous casting method of dissimilar kinds of steel |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP4044582A JPS58157556A (en) | 1982-03-15 | 1982-03-15 | Continuous casting method of dissimilar kinds of steel |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| JPS58157556A JPS58157556A (en) | 1983-09-19 |
| JPH0238301B2 true JPH0238301B2 (en) | 1990-08-29 |
Family
ID=12580839
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP4044582A Granted JPS58157556A (en) | 1982-03-15 | 1982-03-15 | Continuous casting method of dissimilar kinds of steel |
Country Status (1)
| Country | Link |
|---|---|
| JP (1) | JPS58157556A (en) |
Family Cites Families (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPS569049A (en) * | 1979-07-02 | 1981-01-29 | Sumitomo Metal Ind Ltd | Continuous casting method and continuous casting equipment |
-
1982
- 1982-03-15 JP JP4044582A patent/JPS58157556A/en active Granted
Also Published As
| Publication number | Publication date |
|---|---|
| JPS58157556A (en) | 1983-09-19 |
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