JPS6264458A - Continuous casting method for thin ingot - Google Patents
Continuous casting method for thin ingotInfo
- Publication number
- JPS6264458A JPS6264458A JP20429985A JP20429985A JPS6264458A JP S6264458 A JPS6264458 A JP S6264458A JP 20429985 A JP20429985 A JP 20429985A JP 20429985 A JP20429985 A JP 20429985A JP S6264458 A JPS6264458 A JP S6264458A
- Authority
- JP
- Japan
- Prior art keywords
- refractory
- casting
- short sides
- molten steel
- short side
- 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
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
- B22D11/06—Continuous casting of metals, i.e. casting in indefinite lengths into moulds with travelling walls, e.g. with rolls, plates, belts, caterpillars
- B22D11/0637—Accessories therefor
- B22D11/0665—Accessories therefor for treating the casting surfaces, e.g. calibrating, cleaning, dressing, preheating
- B22D11/0671—Accessories therefor for treating the casting surfaces, e.g. calibrating, cleaning, dressing, preheating for heating or drying
Landscapes
- Engineering & Computer Science (AREA)
- Mechanical Engineering (AREA)
- Continuous Casting (AREA)
Abstract
Description
【発明の詳細な説明】
(産業上の利用分野)
本発明は、溶融金属(以下溶鋼の例で述べる)から厚さ
50冒鳳以下のシートバーを製造するベルトギヤスター
の短辺耐火物を鋳造開始前に加熱して、凝固シェルの成
長を抑制することに関するものである。Detailed Description of the Invention (Field of Industrial Application) The present invention is directed to a refractory on the short side of a belt gear star for manufacturing a sheet bar with a thickness of 50 mm or less from molten metal (described below as an example of molten steel). This relates to suppressing the growth of solidified shells by heating before the start of casting.
(従来の技術)
溶鋼から直接シートバーのような鋼板を製造する絞り込
み方式の同期式ベルトキャスターを第2図に示す。この
ヘルドキャスターは、所定の距離にわたって溶銅1や凝
固シェルを保持するための間隙を維持しつつ、複数個の
ガイドロール3a + 3b +3c+3a ’
+3b ’ +3c ’を介して軸回移動しかつ対向
して配置された一対の長辺面となる金属ベルト1,2と
、それらの金属ベルトの両側縁近傍で緊密に接している
短辺となる固定式短辺4′。(Prior Art) Fig. 2 shows a synchronous belt caster of the squeezing method that manufactures steel plates such as seat bars directly from molten steel. This heald caster maintains a gap for holding the molten copper 1 and solidified shell over a predetermined distance, and rolls a plurality of guide rolls 3a + 3b +3c + 3a'.
+3b'+3c' The metal belts 1 and 2 are a pair of long side surfaces that are axially moved via +3c' and are arranged opposite to each other, and the short sides are in close contact near both side edges of these metal belts. Fixed short side 4'.
5′とで鋳造空間を形成している。この固定式短辺は、
100 in以上の径のノズル6を使用して厚さ30龍
以下の薄板を製造するために、その上部を広幅にして下
部に向かうに従って順次先細りとなる略逆三角形の形状
で、耐火物の内張り層を有する構造となっている。5' to form a casting space. This fixed short side is
In order to manufacture a thin plate with a thickness of 30 mm or less using a nozzle 6 with a diameter of 100 inches or more, it has an approximately inverted triangular shape that is wide at the top and gradually tapers toward the bottom, and is lined with refractory material. It has a structure with layers.
このようなベルトキャスターは、30菖■程度の薄鋳片
を鋳造するためにかなりの絞り込みが必要であり、短辺
4’、5’で金属ヘルド1,2の長辺面と同様にあるい
はそれより速く凝固シェルが生成すると、鋳造空間の挟
まる下部で圧縮を受は鋳しわを生したり、引き抜き抵抗
が大きくなって、極端な場合には引き抜(ことができな
くなる。このために、とくに短辺4’、5’を鋳造開始
1fiに加熱することにより、そこに生成される凝固シ
ェルの成長を金属ベルト1.2例の凝固シェルの成長よ
りも遅らせなければならない。In order to cast a thin slab of about 30 iris, such a belt caster requires considerable narrowing down, and the short sides 4' and 5' are similar to or similar to the long sides of the metal healds 1 and 2. If the solidified shell is generated faster, the compression at the lower part of the casting space will cause wrinkles, the pull-out resistance will increase, and in extreme cases, pull-out will not be possible. By heating the short sides 4', 5' to 1fi at the start of casting, the growth of the solidified shell formed there must be delayed compared to the growth of the solidified shell of the metal belt 1.2 example.
このことから、本発明者等は、特願昭56−13019
3号および特願昭56−130194号で、溶鋼と接す
る短辺の面を耐火物にするとともに、この耐火物に埋め
込んだヒーターにより短辺壁を加熱することをに:案じ
た。また、第3閣に示すように鋳造開始に先立ち短辺壁
内側に離間させて仕切板を設けて、その間隙にガスバー
ナ12の火炎を放射して短辺4′5′の内側を加熱し、
鋳造開始時に短辺に形成される凝固シェルの成長を抑制
していた。Based on this, the inventors of the present invention
No. 3 and Japanese Patent Application No. 56-130194, we devised the idea of making the short side surface in contact with molten steel a refractory material, and heating the short side wall with a heater embedded in the refractory material. In addition, as shown in the third panel, prior to the start of casting, a partition plate is provided at a distance on the inside of the short side wall, and the flame of the gas burner 12 is radiated into the gap to heat the inside of the short side 4'5'.
This suppressed the growth of the solidified shell that forms on the short side at the start of casting.
(発明が解決しようとする問題点)
しかし、前者の方法では、短辺の耐火物は一回の鋳込み
しか持たず、鋳込中は加熱する必要がないにもかかわら
す短辺の耐火物中にヒーターを埋設することば手間がか
かり、短辺を製造する際のコストが上がる欠点があった
。(Problem to be Solved by the Invention) However, in the former method, the refractory on the short side is cast only once, and even though there is no need to heat it during casting, the refractory on the short side is heated only once. It took time and effort to embed the heater in the wafer, and the cost of manufacturing the short sides increased.
また、後者のガスバーナーで短辺の耐火物を加熱する場
合は、金属ベルトでの露結防止のためCOガスを使用し
なければならず、加熱コストが電気による加熱の数十倍
となる。さらに、ガスバーナーやその附属機器を設置す
るためにモールド廻りが複雑になり作業性が悪くなると
ともに、ガス漏れの危険があるので着火時にガス濃度の
検査を厳重に行なわれなければならない。また、ガスバ
ーナーによる加熱では、短辺の耐火物の下部まで加熱す
ることが難しく、予熱温度が高くないため短辺面でのシ
ェル成長を完全に抑えることができなかった。In addition, when heating the refractories on the short sides with the latter gas burner, CO gas must be used to prevent dew condensation on the metal belt, and the heating cost is several tens of times higher than heating with electricity. Furthermore, the installation of the gas burner and its auxiliary equipment complicates the mold surroundings, impairing workability, and there is a risk of gas leakage, so the gas concentration must be strictly inspected at the time of ignition. In addition, when heating with a gas burner, it is difficult to heat the bottom of the refractory on the short sides, and the preheating temperature is not high, so shell growth on the short sides cannot be completely suppressed.
本発明は、短辺の製造コストが安く、かつ簡単な方法で
鋳込み開始時における短辺耐大物面でのシェル成長を防
止する薄鋳片の製造方法を提供することを目的とする。SUMMARY OF THE INVENTION An object of the present invention is to provide a method for producing a thin cast slab, which has a low production cost on the short side and which prevents shell growth on the short side large object surface at the start of casting using a simple method.
(問題点を解決するための手段)
本発明は、対向して配置されて軸回移動する一対の金属
ベルトと、これらの金属ベルトの両側縁近傍で金属ベル
トと緊密に接している略逆三角形の形状をした一対の固
定短辺とで形成された空間に溶鋼を注入するに先立ち、
第1a図に示すように固定短辺5′の内側で溶鋼と接す
る耐火物5の面に線状または箔状の発熱体7を貼り付け
あるいは線状、箔状には限定されない発熱体を接触もし
くは近接させて、この発熱体により耐火物5を加熱して
から溶鋼を注入すること特徴とする薄鋳片の連続鋳造方
法である。(Means for Solving the Problems) The present invention includes a pair of metal belts that are arranged opposite to each other and move on an axis, and a substantially inverted triangular belt that is in close contact with the metal belts near both side edges of these metal belts. Before injecting molten steel into the space formed by a pair of fixed short sides in the shape of
As shown in Fig. 1a, a linear or foil-shaped heating element 7 is pasted on the surface of the refractory 5 that contacts the molten steel inside the fixed short side 5', or a heating element not limited to a linear or foil-shaped heating element is contacted. Alternatively, this continuous casting method for thin slabs is characterized in that the refractory 5 is heated by the heating element in close proximity to the refractory 5 and then molten steel is injected.
貼り付は用の前記発熱体を例にあげると、ニクロム系、
Fe −Cr −Al系等の箔あるいは線をセラミック
系の接着材あるいは機械的な接着で耐火物5に貼り付け
る。この際、ブレークアウトの防止や金属ベルトの熱変
形を防止することを考慮するとともに発熱体の短辺耐火
物に対する占有率が173以上になるように、発熱体を
短辺耐火物に貼り付けるとよい。For example, the heating element used for pasting is nichrome,
A Fe-Cr-Al foil or wire is attached to the refractory 5 using a ceramic adhesive or mechanical adhesive. At this time, take into consideration prevention of breakout and thermal deformation of the metal belt, and attach the heating element to the short side refractory so that the occupation ratio of the heating element to the short side refractory is 173 or more. good.
(作用)
鋳込前に、予め第1a図の短辺5′の耐火物の溶鋼面側
にニクロム系、Fe −Cr −Al系等の箔あるいは
線を貼り付けておき、導″fFfA11を電源に接続し
て所定の電圧下で、短辺耐火物を数分間加熱する。(Function) Before casting, nichrome-based, Fe-Cr-Al-based foil or wire is pasted on the molten steel side of the refractory on the short side 5' in Figure 1a, and the conductor ``fFfA11'' is connected to the power source. Connect to the refractory and heat the short side refractory for several minutes under the specified voltage.
この加熱方法は発熱体7と短辺耐火物5とが直に接触し
ているために熱が伝わり易く、ガスバーナーによる輻射
電熱に比べて予熱時間を短縮できるとともに予熱温度を
高くでき、短辺耐火物5の下部まで加熱できる。しかも
、金属ベルトに対して直接熱が伝わらないために、金属
ベルトが熱変形を受けることがない。このように短辺耐
火物5を加熱した後に溶鋼を注入すると、注入開始時に
短辺耐火物5面からシェルが発生することを抑制でき、
円滑な鋳造が可能になる。なお、この際、発熱体7は溶
鋼に溶けるが、鋼の成分に殆ど影響しない。In this heating method, heat is easily transferred because the heating element 7 and the short side refractory 5 are in direct contact, and compared to radiant electric heating using a gas burner, the preheating time can be shortened and the preheating temperature can be increased. The lower part of the refractory 5 can be heated. Furthermore, since heat is not directly transferred to the metal belt, the metal belt does not undergo thermal deformation. By injecting molten steel after heating the short side refractories 5 in this way, it is possible to suppress the formation of shells from the short side refractories 5 at the start of injection,
Enables smooth casting. Note that, at this time, although the heating element 7 melts into the molten steel, it hardly affects the composition of the steel.
(実施例)
1ヒート80トンの溶wA(C: 0.04〜0.06
%、Si:0.05%以下、 Mn : 0.30〜0
.60%、P:0.010〜0.030%、 S :
0.010〜0.030%、 AE :0.03〜0
.06%)を1550°Cから1565°Cの温度で、
第2図に示すようなベルトキャターを用いて、厚さ30
龍。(Example) 80 tons of melt wA (C: 0.04 to 0.06 in 1 heat)
%, Si: 0.05% or less, Mn: 0.30-0
.. 60%, P: 0.010-0.030%, S:
0.010-0.030%, AE: 0.03-0
.. 06%) at a temperature of 1550°C to 1565°C,
Using a belt caster as shown in Figure 2,
Dragon.
幅1200mmの鋳片を鋳造した。A slab with a width of 1200 mm was cast.
この際、短辺耐火物の材質として溶融シリカを用いて、
従来のように短辺耐火物をCOガスにより加熱したもの
と本発明の方法によるものを各々62ヒートの鋳込実績
により、鋳込み一鋳込み間の準備時間、短辺を加熱する
際のランニゲコストおよびフレイクアウト指数の観点か
ら、従来法を1として比較したものを第1表に示す。At this time, using fused silica as the material of the short side refractory,
Based on the casting experience of 62 heats of the conventional method of heating short side refractories with CO gas and the method of the present invention, we have found that the preparation time between castings, the running cost and flaking when heating the short side Table 1 shows a comparison in terms of out index, with the conventional method set as 1.
第1表
この表からも明らかなように、バーナーをセットする時
のような時間もいらず、短辺耐大物の予熱時間も短縮さ
れるために鋳込み準備特開が短縮された。Table 1 As is clear from this table, the time needed to set up the burner is not required, and the preheating time for the short-side heavy-duty material is shortened, so the casting preparation time is shortened.
また、加熱源を高価なCOガスから電気へ転換したため
に、短辺を加熱する際のランニングコストが安くなった
。Additionally, since the heating source was changed from expensive CO gas to electricity, running costs for heating the short sides became cheaper.
さらに、短辺耐大物の予熱温度を高くすることができる
のでシェルの成長が抑制でき、ブレークアウトの頻度が
減少した。Furthermore, since the preheating temperature of the short-side large material can be increased, the growth of the shell can be suppressed, reducing the frequency of breakouts.
(発明の効果)
以上説明したように、短辺耐火物にヒーターを埋設する
ときのような手間と製造コストを必要とせずに、短辺耐
火物に発熱体を貼り付けるだけの簡単な作業で鋳込み準
備時間が短縮され、ランニングコストが安くかつブレイ
クアウトの頻度が低減される。(Effects of the invention) As explained above, the work is as simple as attaching a heating element to the short-side refractory, without requiring the labor and manufacturing costs required when embedding a heater in the short-side refractory. Cast preparation time is shortened, running costs are low and breakout frequency is reduced.
第1a図は、本発明の方法を実施する際に用いるベルト
キャスターのモールドの構造を表わす図であり、
第1b図は、発熱体を短辺に配線した図であり、第2図
は、本発明を実施する際に用いるヘルドキャスターの概
略を表わす図であり、
第3図は、従来のCOガスを用いて固定短辺を加熱する
ところを表わす図である。
1.2・・・金属ベルトFIG. 1a is a diagram showing the structure of a mold for a belt caster used when carrying out the method of the present invention, FIG. 1b is a diagram in which a heating element is wired on the short side, and FIG. FIG. 3 is a diagram schematically showing a heald caster used in carrying out the invention, and FIG. 3 is a diagram showing heating of a fixed short side using conventional CO gas. 1.2...Metal belt
Claims (1)
維持しつつ循環する一対の対向して配置された循環体と
、それら循環体の両側縁部に配置された一対の固定短辺
とで形成された空間に溶湯を注入して薄鋳片を連続鋳造
する方法において、溶湯と接する固定短辺の耐火物の表
面を発熱体により加熱してから溶湯を注入することを特
徴とする薄鋳片の連続鋳造方法。1. Formed by a pair of opposingly placed circulating bodies that circulate while maintaining a gap to hold the molten metal over a certain distance, and a pair of fixed short sides placed on both side edges of the circulating bodies. A method of continuously casting thin slabs by injecting molten metal into a space in which the molten metal is poured, characterized in that the surface of the refractory on the fixed short side that is in contact with the molten metal is heated by a heating element, and then the molten metal is poured. Continuous casting method.
Priority Applications (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
JP20429985A JPS6264458A (en) | 1985-09-18 | 1985-09-18 | Continuous casting method for thin ingot |
Applications Claiming Priority (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
JP20429985A JPS6264458A (en) | 1985-09-18 | 1985-09-18 | Continuous casting method for thin ingot |
Publications (1)
Publication Number | Publication Date |
---|---|
JPS6264458A true JPS6264458A (en) | 1987-03-23 |
Family
ID=16488180
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
JP20429985A Pending JPS6264458A (en) | 1985-09-18 | 1985-09-18 | Continuous casting method for thin ingot |
Country Status (1)
Country | Link |
---|---|
JP (1) | JPS6264458A (en) |
Cited By (3)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
JPH03268845A (en) * | 1990-03-15 | 1991-11-29 | Hitachi Zosen Corp | Method for starting casting in continuous casting equipment |
FR2695846A1 (en) * | 1992-09-23 | 1994-03-25 | Usinor Sacilor | Side closure wall of a continuous casting installation of metals between moving walls and installation comprising such a wall. |
EP0780176A2 (en) | 1995-12-13 | 1997-06-25 | Hitachi, Ltd. | Apparatus for and process of continuous casting |
-
1985
- 1985-09-18 JP JP20429985A patent/JPS6264458A/en active Pending
Cited By (4)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
JPH03268845A (en) * | 1990-03-15 | 1991-11-29 | Hitachi Zosen Corp | Method for starting casting in continuous casting equipment |
FR2695846A1 (en) * | 1992-09-23 | 1994-03-25 | Usinor Sacilor | Side closure wall of a continuous casting installation of metals between moving walls and installation comprising such a wall. |
EP0589811A1 (en) * | 1992-09-23 | 1994-03-30 | Usinor Sacilor | Side wall for a continuous cashing plkant for cashing metal between movable walls and apparatus |
EP0780176A2 (en) | 1995-12-13 | 1997-06-25 | Hitachi, Ltd. | Apparatus for and process of continuous casting |
Similar Documents
Publication | Publication Date | Title |
---|---|---|
JPS6264458A (en) | Continuous casting method for thin ingot | |
JPS61176447A (en) | Starting method of casting and side seal heater in roll type continuous casting installation | |
JPH01170552A (en) | Manufacture of metal strip and strip casting machine | |
US1934901A (en) | Process for producing metal rollers | |
JPS58218353A (en) | Stationary side plate of continuous casting device of thin steel plate | |
JPH04197559A (en) | Continuous casting method for steel | |
JPS5838640A (en) | Continuous casting device for thin metal sheet | |
JPH01170551A (en) | Mold for continuously casting steel | |
JPH0451010Y2 (en) | ||
JPH0275450A (en) | Side plate at short side in thin ingot continuous casting machine | |
JPS6393450A (en) | Production of metal plate | |
JPS62144864A (en) | Ingot making method | |
JPS62101368A (en) | Production of clad ingot | |
JP3746840B2 (en) | Precision casting | |
JPS63215351A (en) | Continuous casting apparatus | |
SU850299A1 (en) | Method of casting bimetallic articles | |
JPS59199150A (en) | Casting method of thin billet by continuous casting machine for thin billet | |
JPH05309453A (en) | Method for controlling induction-heating for refractory-made mold | |
SU45047A1 (en) | Tool for producing steel ingots with reduced shrinkage shells | |
JPH03114632A (en) | Short side plate in cast strip continuous casting machine | |
JPS6064752A (en) | Method for preheating stationary side plate refractories of continuous casting machine for thin walled billet | |
JPS60137555A (en) | Stationary short side wall of continuous casting machine for thin billet | |
JPH0631408A (en) | Dummy bar chuck and starting method for casting hollow cast billet | |
JPH01166868A (en) | Continuous casting apparatus | |
JPS6240957A (en) | Continuous casting device for thin sheet |