JPS5930777A - Tandish spraying material - Google Patents
Tandish spraying materialInfo
- Publication number
- JPS5930777A JPS5930777A JP57141080A JP14108082A JPS5930777A JP S5930777 A JPS5930777 A JP S5930777A JP 57141080 A JP57141080 A JP 57141080A JP 14108082 A JP14108082 A JP 14108082A JP S5930777 A JPS5930777 A JP S5930777A
- Authority
- JP
- Japan
- Prior art keywords
- molten steel
- tandish
- spraying
- spraying material
- present
- 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
Abstract
(57)【要約】本公報は電子出願前の出願データであるた
め要約のデータは記録されません。(57) [Summary] This bulletin contains application data before electronic filing, so abstract data is not recorded.
Description
【発明の詳細な説明】
本発明は、連続鋳造時における溶鋼受はクンデイツビュ
吹付は材に関するものであ・る。DETAILED DESCRIPTION OF THE INVENTION The present invention relates to a molten steel receiver during continuous casting.
最近における使用者側からの要請、付加価値の高い高級
鋼の生産比率の増加、連続鋳造比率の増大にともなって
、鋳造用耐火物のｘ要請は高く、溶鋼品質への影響、特
に溶鋼の凝固直前に使用される溶鋼受はタンディツシュ
吹付は材による非金属介在物の生成は、溶鋼品質への悪
影響をおよぼすもので最も問題視され、吹付は材の改善
および施工法の開発が要望されている実情にある。With the recent demands from users, the increase in the production ratio of high-grade steel with high added value, and the increase in the continuous casting ratio, the requirements for refractories for casting are high, and the impact on the quality of molten steel, especially the solidification of molten steel. The formation of non-metallic inclusions due to the sprayed steel material is considered the most problematic as it has a negative effect on the quality of the molten steel, and improvements in the sprayed steel material and the development of construction methods are required. That's the reality.
従来、転炉出鋼後の二次精錬溶鋼を連続鋳造する際に使
用されるタンディツシュは、粘土煉瓦層にＳｔｏｗ系ま
たはＭｇＯ系の吹付は材を使用する方法が主体であるた
め、タンディツシュ吹付は材そのものが非金属介在物と
なったり、タンディツシュ内溶鋼への復燐現象を抑制出
来がたい嫌いがあった。Traditionally, the tanditsh used for continuous casting of secondary refined molten steel after being tapped from a converter mainly involves spraying Stow-based or MgO-based materials onto the clay brick layer. The material itself becomes non-metallic inclusions, and it is difficult to suppress the phenomenon of rephosphorization in the molten steel in the tundish.
本発明は前記欠点を解消し、溶鋼汚染を防止することを
目的とするもので、その要旨とするところは、ＣａＯに
融点降下剤としてＣａＣ１ｚ ｌ ０〜０％、添加剤と
してＣ５〜０チ、粘結剤として、ＮａｔＯ・ｎ ５ｉＯ
ｚ ５ ％以下を使用することを特徴とするタンディツ
シュ吹付は材を提供するものである。The purpose of the present invention is to eliminate the above-mentioned drawbacks and prevent molten steel contamination.The gist of the present invention is to add 0-0% of CaC1zl as a melting point depressant to CaO, C5-0ch as an additive, As a binder, NatO・n 5iO
Tandish spraying characterized by using z 5% or less provides the material.
本発明に係るタンディツシュ吹付は材の開発は、溶鋼中
非金属介在物の生成かＳｉｎ、 ＞Ａ１．Ｏ。The development of the tundish sprayed material according to the present invention is based on the formation of nonmetallic inclusions in molten steel. O.
＞ ＭｇＯ＞ ＣａＯの順に低下する知見にもとづくも
のである。This is based on the finding that the values decrease in the order of >MgO>CaO.
ＣａＯは融点が２５７２℃と極めて高いうえに、容易に
吸湿して消石灰Ｃａ （ＯＨｘ ）に変化し、作業上Ｃ
ａＯとして活用することは難かしい問題点がある。塩化
カルシウム（：：ａＣ１ｔは融点７７２℃であるが、通
常市販されている塩化カルシウムはＣａＣｌ、、 １２
ＨｔＯであり、その融点は３５０℃程度と推定される。CaO has an extremely high melting point of 2572°C, and it easily absorbs moisture and turns into slaked lime Ca (OHx), making it difficult to use carbon during work.
There are problems that make it difficult to utilize it as an aO. Calcium chloride (::aClt has a melting point of 772°C, but commercially available calcium chloride is CaCl, 12
It is HtO, and its melting point is estimated to be about 350°C.
Ｎａｎｏ・ｎ５ｉｏｚは水ガラスで広く使用されている
公知の粘結剤である。Nano.n5ioz is a well-known binder widely used in water glass.
また、Ｃは微粉状黒鉛を主として使用するもので、熱源
のみならずＣの酸化によるＣＯガス圧によってＣａＯを
カバーするとともに融液の浸入を遅らせる効果がある。Further, since C is mainly used as a fine powder graphite, not only the heat source but also the CO gas pressure caused by the oxidation of C covers CaO and has the effect of delaying the infiltration of the melt.
即ち、本発明のタンディツシュ吹付は材の製造方法とし
ては、石灰に対し、塩化カルシウムｌＯ〜Ｏチ、微粉黒
鉛５〜θ％、水ガラス５％以下を配合混練して、直ちに
熱間吹付け、または溶射吹付けによって、タンディツシ
ュライニングするものである。That is, the tundish spraying method of the present invention involves mixing and kneading calcium chloride 10 to 0, 5 to θ% of fine graphite, and 5% or less of water glass to lime, and immediately hot spraying. Alternatively, it is tundish lined by thermal spraying.
熱間吹＋ｊげ後のタンディツシュは最低温度５００℃に
加熱する必要がある。かくすることによって吸湿囲の強
いＣａＯ１ＣａＣ１ｔの変化を防止できるが、ＣａＣ１
ｔの添加量を１０％以下としたのは受鋼する鋼の特囲に
よって好ましくない事由による。Ｃｉｌが５チ以上とし
ない理由も溶鋼中のＣ量を増加することになって好まし
くないからである。After hot blowing, the tundish must be heated to a minimum temperature of 500°C. By doing so, changes in CaO1CaC1t, which has a strong moisture absorption range, can be prevented, but CaC1
The reason why the amount of t added is set to 10% or less is due to unfavorable reasons depending on the special characteristics of the steel to be received. The reason why Cil is not set to 5 or more is that it increases the amount of C in the molten steel, which is undesirable.
また、水ガラスにょる粘結効果は５％以上は不必要であ
るばかりでなく、吹付は後のコーテイング材の耐火度を
減することになる。Moreover, not only is the caking effect of water glass greater than 5% unnecessary, but spraying will reduce the fire resistance of the subsequent coating.
製造したタンディツシュ吹（＝ｊげ材を熱間吹付は後、
タンディツシュを例えばガス加温して常時８００℃以上
に保持して受鋼し、連続鋳造モールドに注入した。その
結果本発明と従来法との非金属介在物指数は、従来法１
００に対して本発明は６０であった。After hot-spraying the manufactured tanditshu (=j) material,
The tundish was heated with gas, for example, and kept at a temperature of 800° C. or higher at all times to receive the steel, and then poured into a continuous casting mold. As a result, the nonmetallic inclusion index of the present invention and the conventional method is 1
00, whereas the present invention was 60.
第１図は溶鋼中燐の比較結果である。Figure 1 shows the comparison results of phosphorus in molten steel.
上記の例は石灰に対し塩化カルシウム７％、微粉黒鉛５
％、水ガラス３％を配合したものを用いた。The above example shows 7% calcium chloride and 5% fine graphite for lime.
% and 3% water glass was used.
本発明によれば、非金属介在物は約４０％減少し、復燐
現象を抑制できる効果がある。According to the present invention, nonmetallic inclusions are reduced by about 40%, which has the effect of suppressing the rephosphorization phenomenon.
第１図は燐の時間経過のグラフである。 第１図 FIG. 1 is a graph of phosphorus over time. Figure 1
Claims (1)
添加剤としてＣ５〜０チ、粘結剤としてＮａ、０ｎＳｉ
Ｏｚ ５％以下を配合混練したことを特徴とするタンデ
ィツシュ吹付は材。CaC1z 10-0% as a melting point depressant to CaO,
C5~0 as additive, Na, 0nSi as binder
Tanditshu spray material is characterized by being mixed and kneaded with 5% or less of Oz.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP57141080A JPS5930777A (en) | 1982-08-16 | 1982-08-16 | Tandish spraying material |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP57141080A JPS5930777A (en) | 1982-08-16 | 1982-08-16 | Tandish spraying material |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| JPS5930777A true JPS5930777A (en) | 1984-02-18 |
Family
ID=15283742
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP57141080A Pending JPS5930777A (en) | 1982-08-16 | 1982-08-16 | Tandish spraying material |
Country Status (1)
| Country | Link |
|---|---|
| JP (1) | JPS5930777A (en) |
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPS60176826A (en) * | 1984-02-21 | 1985-09-10 | Mitsubishi Motors Corp | Drive coupling device for four wheels drive vehicle |
| CN115028435A (en) * | 2021-07-12 | 2022-09-09 | 张家港市恒乐阳方高温材料有限公司 | High-density tundish dry material and preparation method thereof |
-
1982
- 1982-08-16 JP JP57141080A patent/JPS5930777A/en active Pending
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPS60176826A (en) * | 1984-02-21 | 1985-09-10 | Mitsubishi Motors Corp | Drive coupling device for four wheels drive vehicle |
| JPH06474B2 (en) * | 1984-02-21 | 1994-01-05 | 三菱自動車工業株式会社 | Drive coupling device for four-wheel drive |
| CN115028435A (en) * | 2021-07-12 | 2022-09-09 | 张家港市恒乐阳方高温材料有限公司 | High-density tundish dry material and preparation method thereof |
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