JPH0426933B2 - - Google Patents
Info
- Publication number
- JPH0426933B2 JPH0426933B2 JP7990384A JP7990384A JPH0426933B2 JP H0426933 B2 JPH0426933 B2 JP H0426933B2 JP 7990384 A JP7990384 A JP 7990384A JP 7990384 A JP7990384 A JP 7990384A JP H0426933 B2 JPH0426933 B2 JP H0426933B2
- Authority
- JP
- Japan
- Prior art keywords
- molten steel
- tundish
- weir
- temperature
- passage hole
- 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
Links
- 229910000831 Steel Inorganic materials 0.000 claims description 54
- 239000010959 steel Substances 0.000 claims description 54
- 238000010438 heat treatment Methods 0.000 claims description 10
- 238000009749 continuous casting Methods 0.000 claims description 6
- 238000000034 method Methods 0.000 claims description 4
- 230000005611 electricity Effects 0.000 claims 1
- 238000005266 casting Methods 0.000 description 7
- 238000001514 detection method Methods 0.000 description 2
- 238000010586 diagram Methods 0.000 description 2
- 230000006698 induction Effects 0.000 description 2
- 238000004519 manufacturing process Methods 0.000 description 2
- 239000011819 refractory material Substances 0.000 description 2
- OKTJSMMVPCPJKN-UHFFFAOYSA-N Carbon Chemical compound [C] OKTJSMMVPCPJKN-UHFFFAOYSA-N 0.000 description 1
- 229910052799 carbon Inorganic materials 0.000 description 1
- 238000010276 construction Methods 0.000 description 1
- 238000005265 energy consumption Methods 0.000 description 1
- 230000020169 heat generation Effects 0.000 description 1
- 238000010079 rubber tapping Methods 0.000 description 1
- 238000009628 steelmaking Methods 0.000 description 1
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
- B22D11/11—Treating the molten metal
Landscapes
- Engineering & Computer Science (AREA)
- Mechanical Engineering (AREA)
- Continuous Casting (AREA)
Description
【発明の詳細な説明】
（産業上の利用分野）
この発明は、溶鋼を連続鋳造するに際し、タン
デイツシユ（中間容器）内において、ノズル詰り
の原因となる溶鋼の温度低下を補償する溶鋼の加
熱方法に関する。Detailed Description of the Invention (Industrial Application Field) This invention provides a method for heating molten steel in a tundish (intermediate container) during continuous casting of molten steel to compensate for a temperature drop in the molten steel that causes nozzle clogging. Regarding.
（従来技術）
溶鋼を連続鋳造するに際しては、その鋳込み温
度は、鋼種に応じて造塊法に比し狭い許容範囲で
高精度に管理されねばならない。(Prior Art) When continuously casting molten steel, the casting temperature must be controlled with high precision within a narrower tolerance range than in the ingot-forming method, depending on the type of steel.
その理由として、能う限り鋳込み温度を低くす
ることにより、鋳造組織が微細化し、高品質の鋳
片が得られることが挙げられる。 The reason for this is that by lowering the casting temperature as much as possible, the casting structure becomes finer and a high-quality slab can be obtained.
溶鋼の連続鋳造にあつては、通常１回の鋳込み
に１時間程度を要するが、その間に溶鋼の温度降
下があり、鋳造末期にはノズル閉塞の虞がある処
から、予め高い温度で出鋼する操業形態が採られ
ている。 Continuous casting of molten steel usually takes about one hour for one casting, but the temperature of the molten steel drops during that time, and there is a risk of nozzle clogging at the end of casting, so the steel is tapped at a high temperature in advance. The operating format has been adopted.
製鋼過程から溶鋼を高温で出鋼すると、その温
度に見合う余分のエネルギを消費するのみなら
ず、溶鋼温度の大きな経時変化に起因する製品品
質の不均一性を惹起する等の問題がある。 When molten steel is tapped at a high temperature during the steelmaking process, not only does extra energy commensurate with the temperature be consumed, but there are also problems such as non-uniformity in product quality due to large changes in molten steel temperature over time.
かかる問題を解決すべく、たとえば特開昭58−
35050号公報には、タンデイツシユ内の溶鋼の誘
導加熱することが開示されている。しかしなが
ら、タンデイツシユ内の溶鋼を誘導加熱により昇
温せしめるには大掛かりな電気設備を必要とし、
設備コストの面で不利であるばかりでなく、タン
デイツシユの形状が複雑なものとなるから耐火物
の施工やハンドリングも問題となる。 In order to solve this problem, for example,
Publication No. 35050 discloses induction heating of molten steel in a tundish. However, in order to raise the temperature of molten steel in the tundish by induction heating, large-scale electrical equipment is required.
Not only is this disadvantageous in terms of equipment cost, but the shape of the tundish is complicated, which poses problems in the construction and handling of refractories.
（発明の目的）
この発明は、上に述べた従来技術における問題
を解決する、安価で操業上の取扱いが簡単な溶鋼
の加熱手段を提供することを目的としてなされ
た。(Object of the Invention) The present invention has been made with the object of providing a means for heating molten steel that is inexpensive and easy to handle in operation, which solves the problems in the prior art described above.
（発明の構成）
この発明の要旨は、溶鋼を連続鋳造するに際し
用いるタンデイツシユ内に溶鋼の通過孔を有する
堰を設け、該堰を挾んで溶鋼中に浸漬させた電極
に通電し、前記堰の溶鋼通過孔部分の溶鋼を優先
的に加熱することを特徴とする溶鋼の加熱方法に
ある。(Structure of the Invention) The gist of the present invention is to provide a weir having a passage hole for molten steel in a tundish used for continuous casting of molten steel, and to energize an electrode immersed in the molten steel by sandwiching the weir. A method for heating molten steel characterized by preferentially heating molten steel in a molten steel passage hole portion.
以下に、この発明を詳細に説明する。 This invention will be explained in detail below.
第１図に、この発明を実施するときの装置の一
例を示す。第１図において、１は取鍋、２は溶鋼
であつてタンデイツシユ１２の中で矢印で示す如
く流動する。 FIG. 1 shows an example of an apparatus for carrying out the present invention. In FIG. 1, 1 is a ladle, and 2 is molten steel, which flows in a tundish 12 as shown by arrows.
３は堰であつて、タンデイツシユ１２内を、取
鍋１から溶鋼が供給される側の部分とタンデイツ
シユ１２からノズル５を通して鋳型６内へ溶鋼を
供給する側の部分とに分割する。 Reference numeral 3 denotes a weir which divides the interior of the tundish 12 into a portion where molten steel is supplied from the ladle 1 and a portion where molten steel is supplied from the tundish 12 through the nozzle 5 into the mold 6.
４は溶鋼通過孔であつて、堰３の比較的下方に
穿設される。 Reference numeral 4 denotes a molten steel passage hole, which is bored relatively below the weir 3.
７，８はそれぞれ電極であつて、交通電源９か
ら電流を供給され、溶鋼２を介して通電する。 Reference numerals 7 and 8 are electrodes, each of which is supplied with current from a traffic power source 9 and is passed through the molten steel 2.
１０は制御盤であつて、温度センサ１１からの
溶鋼温度検出結果に基づいて、電極７，８間の通
電時間（ON−OFF）或は電流の大きさを制御す
る。 Reference numeral 10 denotes a control panel that controls the energization time (ON-OFF) between the electrodes 7 and 8 or the magnitude of the current based on the molten steel temperature detection result from the temperature sensor 11.
（作 用）
以上述べたように構成された装置によつて、こ
の発明を実施するときの態様を以下に説明する。(Function) A mode of carrying out the present invention using the apparatus configured as described above will be described below.
取鍋１からタンデイツシユ１２に供給された溶
鋼は、タンデイツシユ１２内を２室に区切る堰３
に穿設された溶鋼通過孔４を通り、さらにタンデ
イツシユ１２下部を配設されたノズル５を介して
鋳型６内に注入される。 The molten steel supplied from the ladle 1 to the tundish 12 is passed through a weir 3 that divides the inside of the tundish 12 into two chambers.
The molten steel passes through a hole 4 for passing through the molten steel and is injected into the mold 6 through a nozzle 5 provided at the bottom of the tundish 12.
電極７，８は堰３によつて２室に区切られてい
るタンデイツシユ１２内のそれぞれの部分に配設
され、溶鋼中に浸漬されている。交通電源９はそ
れぞれの電極７，８に接続されており、この実施
例においては、温度センサ１１による溶鋼温度の
検出結果に基づいて制御盤１０により電極７，８
への電流がON−OFF制御される。 The electrodes 7 and 8 are disposed in respective parts of the tundish 12 which is divided into two chambers by the weir 3, and are immersed in molten steel. The traffic power source 9 is connected to each of the electrodes 7 and 8, and in this embodiment, the control panel 10 connects the electrodes 7 and 8 based on the detection result of the molten steel temperature by the temperature sensor 11.
The current to is controlled ON-OFF.
そこで、連続鋳造の開始と同時に電極７，８間
に電源９から電流を供給すると、両電極７，８間
に存在する溶鋼２によつて導電閉回路が形成され
る。 Therefore, when a current is supplied from a power source 9 between the electrodes 7 and 8 at the same time as the start of continuous casting, a conductive closed circuit is formed by the molten steel 2 existing between the electrodes 7 and 8.
従つて、電極７，８間の溶鋼２は、その電流Ｉ
と抵抗Ｒに対応するジユール熱Ｈ＝I2Rを発生す
る。このようにしてタンデイツシユ１２内の溶鋼
２が加熱されるのであるが、この発明において
は、タンデイツシユ１２内を堰（耐火材）３によ
つて２室に区切るとともに、堰３に溶鋼通過孔４
を穿設しているから、抵抗Ｒは溶鋼流路断面積の
小さな部分、つまり溶鋼通過孔４の部分で最も大
きくなり、従つてこの溶鋼通過孔４内の溶鋼が優
先的に加熱されることになる。 Therefore, the molten steel 2 between the electrodes 7 and 8 has a current I
and the Joule heat H=I 2 R corresponding to the resistance R is generated. In this way, the molten steel 2 in the tundish 12 is heated. In this invention, the inside of the tundish 12 is divided into two chambers by a weir (refractory material) 3, and the molten steel passing hole 4 is provided in the weir 3.
Since the molten steel passage hole 4 has a small cross-sectional area, the resistance R is the largest in the molten steel passage hole 4, and therefore the molten steel in the molten steel passage hole 4 is heated preferentially. become.
このように、溶鋼通過孔４において溶鋼を優先
的に加熱することにより、電極７，８での発熱を
抑え、供給電力が高効率に溶鋼加熱に供されるこ
とになる。 In this way, by preferentially heating the molten steel in the molten steel passage hole 4, heat generation at the electrodes 7 and 8 is suppressed, and the supplied power is used for heating the molten steel with high efficiency.
（実施例）
Ｃ：0.1〜0.2％の中炭素普通鋼を、交流10〜
60V、10000Aで、第１図に示す装置を用いてタ
ンデイツシユ内で加熱した。溶鋼通過孔は、堰に
20mm中のものを６箇穿設したものを用いた。(Example) C: 0.1~0.2% medium carbon ordinary steel, AC 10~
It was heated at 60 V and 10,000 A in a tundish using the apparatus shown in FIG. The molten steel passage hole is located at the weir.
A piece with 6 holes of 20mm diameter was used.
その結果、タンデイツシユ内溶鋼温度を10℃高
めることができた。 As a result, we were able to increase the temperature of molten steel in the tandate by 10℃.
（発明の効果）
この発明は、以上述べたように構成しかつ作用
せしめるようにしたので、製鋼段階における出鋼
温度を低くでき、而して製鋼段階でのエネルギ消
費量を低減することができるのみならず、鋳込温
度を能う限り低く、その水準を高精度に維持しな
がら連続鋳造することが可能となるから、鋳造組
織の緻密なピース内で品質のバラツキのない高品
質の鋳片を得ることができる等の効果を奏する。(Effects of the Invention) Since the present invention is configured and operated as described above, it is possible to lower the tapping temperature in the steel manufacturing stage, and thus reduce energy consumption in the steel manufacturing stage. Not only that, but continuous casting is possible while keeping the pouring temperature as low as possible and maintaining that level with high precision, resulting in high-quality slabs with consistent quality within the piece with a dense casting structure. It is possible to obtain the following effects.
第１図は、この発明を実施するときの装置の一
例を示す図である。
図中、１……取鍋、２……溶鋼、３……堰、４
……溶鋼通過孔、５……ノズル、６……鋳型、
７，８……電極、９……交流電源、１０……制御
盤、１１……温度センサ、１２……タンデイツシ
ユである。
FIG. 1 is a diagram showing an example of an apparatus for implementing the present invention. In the diagram, 1... Ladle, 2... Molten steel, 3... Weir, 4
... Molten steel passage hole, 5 ... Nozzle, 6 ... Mold,
7, 8...Electrode, 9...AC power supply, 10...Control panel, 11...Temperature sensor, 12...Tundish.
Claims (1)
シユ内に溶鋼の通過孔を有する堰を設け、該堰を
挾んで溶鋼中に浸漬させた電極に通電し、前記堰
の溶鋼通過孔部分の溶鋼を優先的に加熱すること
を特徴とする溶鋼の加熱方法。1. A weir having a passage hole for molten steel is provided in a tundish used for continuous casting of molten steel, and electricity is applied to electrodes immersed in the molten steel between which the weir is sandwiched, so that the molten steel in the molten steel passage hole part of the weir is preferentially A method for heating molten steel, which is characterized by heating.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP7990384A JPS60223648A (en) | 1984-04-20 | 1984-04-20 | Heating method of molten steel |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP7990384A JPS60223648A (en) | 1984-04-20 | 1984-04-20 | Heating method of molten steel |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| JPS60223648A JPS60223648A (en) | 1985-11-08 |
| JPH0426933B2 true JPH0426933B2 (en) | 1992-05-08 |
Family
ID=13703239
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP7990384A Granted JPS60223648A (en) | 1984-04-20 | 1984-04-20 | Heating method of molten steel |
Country Status (1)
| Country | Link |
|---|---|
| JP (1) | JPS60223648A (en) |
Families Citing this family (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPH01233050A (en) * | 1988-03-11 | 1989-09-18 | Sumitomo Light Metal Ind Ltd | Method for continuously casting al-li alloy |
| JPH035050A (en) * | 1989-05-30 | 1991-01-10 | Sumitomo Metal Ind Ltd | Method for lowering oxygen in molten steel in tundish |
-
1984
- 1984-04-20 JP JP7990384A patent/JPS60223648A/en active Granted
Also Published As
| Publication number | Publication date |
|---|---|
| JPS60223648A (en) | 1985-11-08 |
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