JPH09118910A - Molten steel refining agent - Google Patents
Molten steel refining agentInfo
- Publication number
- JPH09118910A JPH09118910A JP27436495A JP27436495A JPH09118910A JP H09118910 A JPH09118910 A JP H09118910A JP 27436495 A JP27436495 A JP 27436495A JP 27436495 A JP27436495 A JP 27436495A JP H09118910 A JPH09118910 A JP H09118910A
- Authority
- JP
- Japan
- Prior art keywords
- molten steel
- refining agent
- refining
- steel
- electric furnace
- 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.)
- Granted
Links
Classifications
-
- Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
- Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
- Y02P—CLIMATE CHANGE MITIGATION TECHNOLOGIES IN THE PRODUCTION OR PROCESSING OF GOODS
- Y02P10/00—Technologies related to metal processing
- Y02P10/20—Recycling
Landscapes
- Treatment Of Steel In Its Molten State (AREA)
Abstract
Description
【０００１】[0001]
【発明の属する技術分野】本発明は、溶鋼精錬剤に関す
るものである。TECHNICAL FIELD The present invention relates to a molten steel refining agent.
【０００２】[0002]
【従来の技術】従来より、溶鋼精錬剤としてはＣａＯ系
溶鋼精錬剤が使用されている。その主成分であるＣａＯ
は保管中に水分を吸収し易いので十分に乾燥してから使
用されているが、それでも溶鋼処理雰囲気の水蒸気分圧
が高いとその僅かな水分を介して鋼に水素が混入する。
そこで、それを除去するため再加熱処理等が行われてい
るがコストが増大するという欠点があった。2. Description of the Related Art Conventionally, a CaO-based molten steel refining agent has been used as a molten steel refining agent. Its main component is CaO
Since it easily absorbs water during storage, it is used after being sufficiently dried. However, if the steam partial pressure in the molten steel treatment atmosphere is high, hydrogen is mixed into the steel through the slight water content.
Therefore, reheating treatment or the like is performed to remove it, but there is a drawback that the cost increases.
【０００３】近年、溶鋼処理コストの更なる低減を実現
するため、鋼に水素混入する恐れのない溶鋼精錬剤が要
求されており、焼成又は溶融処理されてなるＣａＯ−Ｃ
ａＦ 2 −Ａｌ2 Ｏ3 −ＳｉＯ2 系溶鋼精錬剤（特公昭６
１−６１３０号公報）等が提案されているが、十分に満
足するものではなかった。In recent years, the cost of molten steel has been further reduced.
Therefore, a molten steel refining agent that does not mix hydrogen with steel is required.
CaO-C that has been sought after and has been fired or melt treated
aF Two-AlTwoOThree-SiOTwoSystem molten steel refining agent
No. 1-6130) is proposed, but
It wasn't enough.
【０００４】[0004]
【発明が解決しようとする課題】本発明の目的は、従来
以上に鋼に水素混入する恐れのない溶鋼精錬剤を提供す
ることである。SUMMARY OF THE INVENTION An object of the present invention is to provide a molten steel refining agent which is less likely to contain hydrogen in steel than ever before.
【０００５】[0005]
【課題を解決するための手段】すなわち、本発明は、化
学成分として、ＣａＦ2 ４０〜８０重量％、Ａｌ2 Ｏ 3
１０〜５０重量％、ＳｉＯ2 ５〜１５重量％を含有して
なることを特徴とする溶鋼精錬剤である。That is, the present invention is
CaF as an academic componentTwo40-80% by weight, AlTwoO Three
10-50% by weight, SiOTwoContaining 5-15% by weight
Is a molten steel refining agent.
【０００６】[0006]
【発明の実施の形態】以下、本発明を更に詳しく説明す
る。BEST MODE FOR CARRYING OUT THE INVENTION Hereinafter, the present invention will be described in more detail.
【０００７】本発明の溶鋼精錬剤において、ＣａＦ2 成
分が４０重量％未満では溶鋼精錬剤の溶融温度が高くな
り溶鋼の精錬効果が低下し、また８０重量％を越えると
Ａｌ 2 Ｏ3 、ＳｉＯ2 の割合が低くなり溶鋼の精錬効果
が劣る。好ましくは５０〜７０重量％である。ＣａＦ2
成分としては蛍石等が使用される。In the molten steel refining agent of the present invention, CaF2Success
If the content is less than 40% by weight, the melting temperature of the molten steel refining agent becomes high.
If the refining effect of molten steel decreases, and if it exceeds 80% by weight
Al 2OThree, SiO2The ratio of smelting decreases and the refining effect of molten steel
Is inferior. It is preferably 50 to 70% by weight. CaF2
Fluorite, etc. is used as a component.
【０００８】本発明の溶鋼精錬剤において、Ａｌ2 Ｏ3
成分が１０重量％未満では溶鋼精錬効果が劣り、また５
０重量％を越えるとＣａＦ2 、ＳｉＯ2 の割合が低くな
って溶融温度が高まり、鋼に水素が混入するなどして溶
鋼の精錬効果が低下する。好ましくは２０〜４０重量％
である。Ａｌ2 Ｏ3 成分としては、焼成アルミナ、電融
アルミナ、ボーキサイト等が使用される。In the molten steel refining agent of the present invention, Al 2 O 3
If the content is less than 10% by weight, the effect of refining molten steel is inferior, and 5
If it exceeds 0% by weight, the proportion of CaF 2 and SiO 2 becomes low, the melting temperature rises, hydrogen is mixed into the steel, and the refining effect of molten steel decreases. Preferably 20 to 40% by weight
It is. As the Al 2 O 3 component, calcined alumina, fused alumina, bauxite or the like is used.
【０００９】本発明の溶鋼精錬剤において、ＳｉＯ2 成
分が５重量％未満では鋼に水素が混入しやすくなり、ま
た１５重量％を越えると鋼にＳｉＯ2 、Ｓｉが混入しや
すくなる。好ましくは５〜１０重量％である。ＳｉＯ2
成分としては珪石、珪砂、溶融シリカ、合成シリカ等が
使用される。In the molten steel refining agent of the present invention, if the SiO 2 component is less than 5% by weight, hydrogen easily mixes in the steel, and if it exceeds 15% by weight, SiO 2 and Si easily mix in the steel. Preferably it is 5 to 10% by weight. SiO 2
As the component, silica stone, silica sand, fused silica, synthetic silica and the like are used.
【００１０】本発明の溶鋼精錬剤は、ＣａＦ2 、Ａｌ2
Ｏ3 及びＳｉＯ2 を主成分として構成されるが、残部と
してＭｇＯ、ＣａＯ等の成分を合計で１〜４重量％程度
含有していても差し支えない。The molten steel refining agent of the present invention comprises CaF 2 and Al 2
Although it is composed mainly of O 3 and SiO 2 , it may be contained as a balance of about 1 to 4% by weight in total, such as MgO and CaO.
【００１１】本発明の溶鋼精錬剤は、例えば蛍石と電融
アルミナと珪石の所定量を混合し、ロータリーキルン等
で焼成又は電気炉で溶融後粗砕し１〜５ｍｍ程度に整粒
することによって製造することができる。The molten steel refining agent of the present invention is prepared, for example, by mixing a predetermined amount of fluorite, fused alumina and silica, firing in a rotary kiln or the like or melting in an electric furnace and then crushing and sizing to about 1-5 mm. It can be manufactured.
【００１２】[0012]
【実施例】以下、実施例、比較例、参考例をあげて更に
具体的に本発明を説明する。EXAMPLES The present invention will be described more specifically with reference to Examples, Comparative Examples and Reference Examples.
【００１３】実施例１〜１３、比較例１〜３０ 参考例
１〜２ 蛍石（市販品、ＣａＦ2 ９６．０％）、電融アルミナ
（市販品、Ａｌ2 Ｏ3 ９９．０％）及び珪石（市販品、
ＳｉＯ2 ９５．０％）を表１に示す化学成分になるよう
に混合し、それを１２５０℃、１時間焼成した後１〜３
ｍｍに整粒し、種々の溶鋼精錬剤を製造した。参考例１
と参考例２は特公昭６１−６１３０号公報に基づいた溶
融品と焼成品である。Examples 1 to 13, Comparative Examples 1 to 30 Reference Examples 1 to 2 Fluorite (commercial product, CaF 2 96.0%), fused alumina (commercial product, Al 2 O 3 99.0%) and Silica (commercial item,
SiO 2 95.0%) was mixed so as to have the chemical composition shown in Table 1, and the mixture was baked at 1250 ° C. for 1 hour, and then 1 to 3
The particle size was adjusted to mm to produce various molten steel refining agents. Reference Example 1
Reference Example 2 is a melted product and a fired product based on Japanese Patent Publication No. 61-6130.
【００１４】溶鋼（市販品、ＳＳ４１、溶融温度１６０
０℃）に０．５重量％の溶鋼精錬剤を投入し５分間精錬
処理をし、処理前後の溶鋼中のＯ、Ｈ含有率を測定し、
次式に従って脱酸率、脱水素率を計算した。それらの結
果を表１に示す。Molten steel (commercial product, SS41, melting temperature 160
0.5% by weight of molten steel refining agent at 0 ° C.) and refining treatment for 5 minutes, and O and H contents in the molten steel before and after the treatment are measured,
The deoxidation rate and dehydrogenation rate were calculated according to the following formulas. Table 1 shows the results.
【００１５】脱酸率（％）＝（溶鋼から除去された酸素
重量×）１００／（精錬処理前の溶鋼中の酸素重量）Deoxidation rate (%) = (weight of oxygen removed from molten steel ×) 100 / (weight of oxygen in molten steel before refining treatment)
【００１６】脱水素率（％）＝（溶鋼から除去された水
素重量）×１００／（精錬処理前の溶鋼中の水素重量）Dehydrogenation rate (%) = (weight of hydrogen removed from molten steel) × 100 / (weight of hydrogen in molten steel before refining)
【００１７】[0017]
【表１】 [Table 1]
【００１８】[0018]
【発明の効果】本発明の溶鋼精錬剤は、溶鋼に対する溶
融性、水蒸気分圧の高い雰囲気中における耐水素性に優
れているので、鋼に水素が殆ど混入しない溶鋼処理が可
能となる。Since the molten steel refining agent of the present invention is excellent in meltability with respect to molten steel and hydrogen resistance in an atmosphere having a high partial pressure of water vapor, it enables molten steel treatment in which hydrogen is hardly mixed into steel.
Claims (1)
量％、Ａｌ2 Ｏ3 １０〜５０重量％、ＳｉＯ2 ５〜１５
重量％を含有してなることを特徴とする溶鋼精錬剤。1. As chemical components, CaF 2 40 to 80 wt%, Al 2 O 3 10 to 50 wt%, SiO 2 5 to 15
A molten steel refining agent, characterized in that the molten steel refining agent is contained.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP27436495A JP3276049B2 (en) | 1995-10-23 | 1995-10-23 | Molten steel refining agent |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP27436495A JP3276049B2 (en) | 1995-10-23 | 1995-10-23 | Molten steel refining agent |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| JPH09118910A true JPH09118910A (en) | 1997-05-06 |
| JP3276049B2 JP3276049B2 (en) | 2002-04-22 |
Family
ID=17540637
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP27436495A Expired - Fee Related JP3276049B2 (en) | 1995-10-23 | 1995-10-23 | Molten steel refining agent |
Country Status (1)
| Country | Link |
|---|---|
| JP (1) | JP3276049B2 (en) |
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN110322057A (en) * | 2019-06-20 | 2019-10-11 | 江阴兴澄特种钢铁有限公司 | A kind of forecasting system and prediction technique of 100t direct current electric arc furnace tapping carbon component |
| CN114921617A (en) * | 2022-04-27 | 2022-08-19 | 内蒙古北方重工业集团有限公司 | Hydrogen control method for TP316H austenitic stainless steel |
-
1995
- 1995-10-23 JP JP27436495A patent/JP3276049B2/en not_active Expired - Fee Related
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN110322057A (en) * | 2019-06-20 | 2019-10-11 | 江阴兴澄特种钢铁有限公司 | A kind of forecasting system and prediction technique of 100t direct current electric arc furnace tapping carbon component |
| CN114921617A (en) * | 2022-04-27 | 2022-08-19 | 内蒙古北方重工业集团有限公司 | Hydrogen control method for TP316H austenitic stainless steel |
| CN114921617B (en) * | 2022-04-27 | 2023-07-14 | 内蒙古北方重工业集团有限公司 | Hydrogen control method for TP316H austenitic stainless steel |
Also Published As
| Publication number | Publication date |
|---|---|
| JP3276049B2 (en) | 2002-04-22 |
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