JPH03258443A - Method for estimating stuck quantity of alumina in continuous casting - Google Patents
Method for estimating stuck quantity of alumina in continuous castingInfo
- Publication number
- JPH03258443A JPH03258443A JP5273590A JP5273590A JPH03258443A JP H03258443 A JPH03258443 A JP H03258443A JP 5273590 A JP5273590 A JP 5273590A JP 5273590 A JP5273590 A JP 5273590A JP H03258443 A JPH03258443 A JP H03258443A
- Authority
- JP
- Japan
- Prior art keywords
- molten steel
- opening area
- calculated
- nozzle
- tundish
- 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
- PNEYBMLMFCGWSK-UHFFFAOYSA-N aluminium oxide Inorganic materials [O-2].[O-2].[O-2].[Al+3].[Al+3] PNEYBMLMFCGWSK-UHFFFAOYSA-N 0.000 title claims abstract description 18
- 238000009749 continuous casting Methods 0.000 title claims abstract description 13
- 238000000034 method Methods 0.000 title claims abstract description 13
- 229910000831 Steel Inorganic materials 0.000 claims abstract description 21
- 239000010959 steel Substances 0.000 claims abstract description 21
- 241000277275 Oncorhynchus mykiss Species 0.000 claims abstract description 5
- 238000007654 immersion Methods 0.000 claims description 13
- 238000010586 diagram Methods 0.000 description 4
- 238000005266 casting Methods 0.000 description 2
- 238000007796 conventional method Methods 0.000 description 2
- 230000000694 effects Effects 0.000 description 2
- 230000005484 gravity Effects 0.000 description 2
- 238000007664 blowing Methods 0.000 description 1
- 230000003449 preventive effect Effects 0.000 description 1
Landscapes
- Continuous Casting (AREA)
Abstract
Description
【発明の詳細な説明】
［産業上の利用分野コ
本発明は、連続鋳造における浸漬ノズル詰まりの原因と
なるアルミナ付着量推定方法に関するものである。DETAILED DESCRIPTION OF THE INVENTION [Field of Industrial Application] The present invention relates to a method for estimating the amount of alumina deposited, which causes clogging of immersion nozzles in continuous casting.
［従来の技術］
連続鋳造のタンディツシュからモールドへ溶鋼を注入す
るに際し、浸漬ノズルにアルミナなどの非金属介在物が
付着し、スライデングノズルや。[Prior Art] When molten steel is injected from the tundish into the mold in continuous casting, non-metallic inclusions such as alumina adhere to the immersion nozzle, causing damage to the sliding nozzle.
モールドの溶鋼のレベル制御用のノズルの流量特性に影
響を及ぼし、モールドレベルの変動を起こし、さらには
ノズル詰まりによる鋳造中止を招くことがある。This may affect the flow rate characteristics of the nozzle for controlling the level of molten steel in the mold, causing fluctuations in the mold level, and even leading to stopping of casting due to nozzle clogging.
第２図に従来のノズル詰まり防止方法の説明図を示す。FIG. 2 shows an explanatory diagram of a conventional method for preventing nozzle clogging.
従来、上記の様なノズル詰まりの場合、第２図（ａ、）
に示すガススリーブノズル６ａや第２図（ｂ）に示すポ
ーラスノズル６ｂ、第２図（Ｃ）に示すガス吹込みスト
ッパー８等を使用し、不活性ガス例えばＡｒガスを吹き
込み、アルミナの析出を防止する方式が採用されていた
が、最終的にはノズル交換を行うことが主な対策であっ
た。Conventionally, in the case of nozzle clogging as described above, Fig. 2 (a,)
Using the gas sleeve nozzle 6a shown in FIG. 2(b), the porous nozzle 6b shown in FIG. 2(b), the gas blowing stopper 8 shown in FIG. A preventive method was adopted, but ultimately the main countermeasure was to replace the nozzle.
［発明が解決しようとする課題］
本発明は、上記の如き浸漬ノズル部に付着するアルミナ
などの非金属介在物等による浸漬ノズル詰まりを防止す
るための、明確な判断情報を計算するアルミナ付着量推
定方法を提供することを目的とするものである。[Problems to be Solved by the Invention] The present invention provides an alumina adhesion amount that calculates clear judgment information in order to prevent clogging of a submerged nozzle due to nonmetallic inclusions such as alumina that adhere to the submerged nozzle portion as described above. The purpose is to provide an estimation method.
［課題を解決するための手段］
本発明は、
連続鋳造のタンディツシュからモールドへ溶鋼を注入す
る浸漬ノズルにおいて、
前記モールドから出る溶鋼量と前記タンディツシュ内の
溶鋼ヘッドからスライドゲート開口面積Ｋｏを計算し、
前記タンディツシュノズルの実開度から計算した実開口
面積にと前記計算スライドゲート開口面積Ｋ の面積差
（Ｋ−Ｋ０）を前記浸漬ノズル部に付着するアルミナ量
と推定することを特徴とする連続鋳造のアルミナ付着量
推定方法であり、求めた面積差（Ｋ−Ｋｏ＞が一定量を
超えた場合警報を発し、これにより浸漬ノズルを交換す
ることを特徴とする連続鋳造のアルミナ付着量推定方法
である。[Means for Solving the Problems] The present invention provides, in a submerged nozzle for injecting molten steel from a tundish into a mold in continuous casting, a slide gate opening area Ko is calculated from the amount of molten steel coming out of the mold and the molten steel head in the tundish. , the area difference (K-K0) between the actual opening area calculated from the actual opening of the tundish nozzle and the calculated slide gate opening area K is estimated as the amount of alumina attached to the immersion nozzle portion. This is a method for estimating the amount of alumina deposited in continuous casting, and is characterized by issuing an alarm when the calculated area difference (K-Ko> exceeds a certain amount, and thereby replacing the immersion nozzle.) It's a method.
［作用コ
本発明の連続鋳造のアルミナ付着量推定方法においては
、後述する第１図において、
モールド１から出る溶鋼量Ｑを次式■より計算し、この
溶鋼量Ｑとタンディツシュ内の溶鋼ヘッドＨとからスラ
イドゲート開口面積Ｋ。を次式■により計算し、この計
算スライドゲート開口面積Ｋｏと実開度から計算した実
開口面積にとの面積差（Ｋ−Ｋ０）を浸漬ノズル部に付
着するアルミナ量と推定するものである。[Function] In the method of estimating the amount of alumina deposited in continuous casting of the present invention, the amount of molten steel Q coming out of the mold 1 is calculated from the following formula (■) in FIG. and slide gate opening area K. is calculated using the following formula (■), and the area difference (K - K0) between this calculated slide gate opening area Ko and the actual opening area calculated from the actual opening degree is estimated as the amount of alumina attached to the immersion nozzle part. .
Ｑ−モールド面積×引抜速度×溶鋼比重・・・■Ｃ：流
出係数
α：補正係数
次に本発明の実施例について述べる。Q - Mold area x drawing speed x specific gravity of molten steel C: Outflow coefficient α: Correction coefficient Next, embodiments of the present invention will be described.
［実施例］
第１図は本発明の連続鋳造のアルミナ付着量推定方法を
示す説明図である。[Example] FIG. 1 is an explanatory diagram showing a method for estimating the amount of alumina deposited in continuous casting according to the present invention.
図において、１はモールド、２はタンディツシュ、３は
溶鋼、４はスライドゲート、５は浸漬ノズル、６はスラ
イデングノズル、７は圧力発信器である。In the figure, 1 is a mold, 2 is a tundish, 3 is molten steel, 4 is a slide gate, 5 is an immersion nozzle, 6 is a sliding nozzle, and 7 is a pressure transmitter.
図に示す如く、タンディツシュ２内の溶鋼３はスライデ
ングノズル６．スライドゲート４．浸漬ノズル５を通し
てモールド１に注入される。As shown in the figure, the molten steel 3 in the tundish 2 is fed through the sliding nozzle 6. Slide gate 4. It is injected into the mold 1 through the immersion nozzle 5.
ここで、モールド１内の溶鋼レベルを一定にするべくス
ライドゲート４を操作しているが、スライデングノズル
６．スライドゲート４．浸漬ノズル５のノズル内部に非
金属介在物であるアルミナが付着してくるとノズル実開
度から計算した開口面積には大きくなる。Here, the slide gate 4 is operated to keep the molten steel level in the mold 1 constant, but the sliding nozzle 6. Slide gate 4. When alumina, which is a non-metallic inclusion, adheres to the inside of the nozzle of the immersion nozzle 5, the opening area becomes larger than that calculated from the actual nozzle opening.
そこで、スライドゲート部４の内部形状が理想的である
と仮定して、モールド１から引抜かれる鋳片量からノズ
ル部を流れる溶鋼量Ｑを次式■より求める。Therefore, assuming that the internal shape of the slide gate section 4 is ideal, the amount Q of molten steel flowing through the nozzle section is determined from the amount of slab pulled out from the mold 1 using the following equation (2).
Ｑ〜モールド面積×引抜速度×溶鋼比重・・・■この溶
鋼量Ｑとさらにタンディツシュ部２の溶鋼高さＨから次
式■より理想的なスライドゲート開口面積Ｋ。を求める
。Q~Mold area x drawing speed x specific gravity of molten steel...■ From this molten steel amount Q and the molten steel height H of the tundish section 2, the following formula ■ gives the ideal slide gate opening area K. seek.
これをスライドゲート４に取付けられた開度検出器出力
から得る実開口面積にと比較し、（Ｋ−Ｋ０）の差が一
定量を超えた場合警報を発するようにしたものである。This is compared with the actual opening area obtained from the output of the opening detector attached to the slide gate 4, and an alarm is issued if the difference between (K-K0) exceeds a certain amount.
但し、Ｋは下記の計算式で得る。However, K is obtained by the following calculation formula.
Ｄ
ｇ ：ストローク
Ｄニスライドゲート穴半径
以上の如く、モールドから出る溶鋼量Ｑを計算し、この
計算値Ｑとタンディツシュ内の溶鋼ヘッドＨからスライ
ドゲート開口面積Ｋ。を計算し、タンディツシュノズル
の実開度から計算した実開口面積にと計算スライドゲー
ト開口面積Ｋ。の面積差に−Ｋｏを算出することにより
、この値を浸漬ノズル部に付着するアルミナ量と推定し
、この推定量により警報を発し、これにより浸漬ノズル
を交換するようにしたので、従来法におけるノズル詰ま
りによるノズル交換のための鋳造中止が少なくなり、計
画交換が可能となった。D g: Calculate the amount Q of molten steel coming out of the mold as the stroke D is greater than the radius of the slide gate hole, and use this calculated value Q and the slide gate opening area K from the molten steel head H in the tundish. Calculate the actual opening area calculated from the actual opening degree of the tundish nozzle and calculate the sliding gate opening area K. By calculating -Ko for the area difference between Casting stops due to nozzle replacement due to nozzle clogging are reduced, and planned replacement is now possible.
［発明の効果］
本発明の連続鋳造の浸漬ノズル詰まり防止方法によれば
、浸漬ノズルに付着する析出アルミナ量を事前に推定し
、この量により警報を発するようにし、ノズル交換によ
るトラブルが防止出来る等の効果を奏するものである。[Effects of the Invention] According to the method for preventing clogging of a continuous casting immersion nozzle of the present invention, the amount of precipitated alumina adhering to the immersion nozzle is estimated in advance, and an alarm is issued based on this amount, thereby preventing troubles caused by nozzle replacement. It has the following effects.
第１図は本発明の連続鋳造のアルミナ付着量推定方法の
説明図、第２図は従来のノズル詰まり防止方法の説明図
である。
図において、１：モールド、２：タンディッシュ、３：
溶鋼、４ニスライドゲート、５：浸漬ノズル、６：スラ
イデングノズル、７：圧力発信器。FIG. 1 is an explanatory diagram of a method for estimating the amount of alumina deposited in continuous casting according to the present invention, and FIG. 2 is an explanatory diagram of a conventional method for preventing nozzle clogging. In the figure, 1: mold, 2: tundish, 3:
Molten steel, 4 Ni-Ride gate, 5: Immersion nozzle, 6: Sliding nozzle, 7: Pressure transmitter.
Claims (2)
注入する浸漬ノズルにおいて、 前記モールドから出る溶鋼量と前記タンディッシュ内の
溶鋼ヘッドからスライドゲート開口面積Ｋ＿０を計算し
、 前記タンディッシュノズルの実開度から計算した実開口
面積Ｋと前記計算スライドゲート開口面積Ｋ＿０の面積
差（Ｋ−Ｋ＿０）を前記浸漬ノズル部に付着するアルミ
ナ量と推定する ことを特徴とする連続鋳造のアルミナ付着量推定方法。(1) In a submerged nozzle that injects molten steel from a tundish into a mold in continuous casting, calculate the slide gate opening area K_0 from the amount of molten steel coming out of the mold and the molten steel head in the tundish, and calculate the actual opening of the tundish nozzle. A method for estimating the amount of alumina deposited in continuous casting, characterized by estimating the area difference (K-K_0) between the actual opening area K calculated from the angle and the calculated slide gate opening area K_0 as the amount of alumina deposited on the immersion nozzle part. .
警報を発し、これにより前記浸漬ノズルを交換すること
を特徴とする請求項１記載の連続鋳造のアルミナ付着量
推定方法。(2) The method for estimating the amount of alumina deposited in continuous casting according to claim 1, wherein an alarm is issued when the area difference (K-K_0) exceeds a certain amount, and the immersion nozzle is replaced accordingly.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP5273590A JPH03258443A (en) | 1990-03-06 | 1990-03-06 | Method for estimating stuck quantity of alumina in continuous casting |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP5273590A JPH03258443A (en) | 1990-03-06 | 1990-03-06 | Method for estimating stuck quantity of alumina in continuous casting |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| JPH03258443A true JPH03258443A (en) | 1991-11-18 |
Family
ID=12923187
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP5273590A Pending JPH03258443A (en) | 1990-03-06 | 1990-03-06 | Method for estimating stuck quantity of alumina in continuous casting |
Country Status (1)
| Country | Link |
|---|---|
| JP (1) | JPH03258443A (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JP2014515318A (en) * | 2011-09-28 | 2014-06-30 | ヒュンダイ スチール カンパニー | Prediction method of continuous casting number in continuous casting |
-
1990
- 1990-03-06 JP JP5273590A patent/JPH03258443A/en active Pending
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JP2014515318A (en) * | 2011-09-28 | 2014-06-30 | ヒュンダイ スチール カンパニー | Prediction method of continuous casting number in continuous casting |
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