JPS6333514A - Manufacture of molten steel containing calcium by refining - Google Patents
Manufacture of molten steel containing calcium by refiningInfo
- Publication number
- JPS6333514A JPS6333514A JP17278686A JP17278686A JPS6333514A JP S6333514 A JPS6333514 A JP S6333514A JP 17278686 A JP17278686 A JP 17278686A JP 17278686 A JP17278686 A JP 17278686A JP S6333514 A JPS6333514 A JP S6333514A
- Authority
- JP
- Japan
- Prior art keywords
- molten steel
- alloy
- containing calcium
- weight
- 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.)
- Granted
Links
- 229910000831 Steel Inorganic materials 0.000 title claims abstract description 37
- 239000010959 steel Substances 0.000 title claims abstract description 37
- 229910052791 calcium Inorganic materials 0.000 title claims abstract description 16
- 238000004519 manufacturing process Methods 0.000 title claims abstract description 10
- 238000007670 refining Methods 0.000 title claims abstract description 6
- 239000011575 calcium Substances 0.000 title claims description 56
- OYPRJOBELJOOCE-UHFFFAOYSA-N Calcium Chemical compound [Ca] OYPRJOBELJOOCE-UHFFFAOYSA-N 0.000 title claims description 11
- 229910045601 alloy Inorganic materials 0.000 claims abstract description 25
- 239000000956 alloy Substances 0.000 claims abstract description 25
- 229910014460 Ca-Fe Inorganic materials 0.000 claims abstract description 24
- 229910052802 copper Inorganic materials 0.000 claims abstract description 8
- 229910052759 nickel Inorganic materials 0.000 claims abstract description 8
- 229910052748 manganese Inorganic materials 0.000 claims abstract description 5
- 229910052782 aluminium Inorganic materials 0.000 claims abstract 2
- 239000012535 impurity Substances 0.000 abstract description 4
- 229910052742 iron Inorganic materials 0.000 abstract description 4
- 239000000203 mixture Substances 0.000 abstract description 3
- 238000009849 vacuum degassing Methods 0.000 abstract description 3
- UCKMPCXJQFINFW-UHFFFAOYSA-N Sulphide Chemical compound [S-2] UCKMPCXJQFINFW-UHFFFAOYSA-N 0.000 abstract 2
- 238000000034 method Methods 0.000 description 11
- XEEYBQQBJWHFJM-UHFFFAOYSA-N Iron Chemical compound [Fe] XEEYBQQBJWHFJM-UHFFFAOYSA-N 0.000 description 9
- 229910000882 Ca alloy Inorganic materials 0.000 description 7
- 238000010586 diagram Methods 0.000 description 5
- 238000007796 conventional method Methods 0.000 description 4
- 230000005484 gravity Effects 0.000 description 4
- 239000002893 slag Substances 0.000 description 4
- 150000003568 thioethers Chemical class 0.000 description 4
- 229910000640 Fe alloy Inorganic materials 0.000 description 3
- 239000000654 additive Substances 0.000 description 3
- 238000002347 injection Methods 0.000 description 3
- 239000007924 injection Substances 0.000 description 3
- 239000002436 steel type Substances 0.000 description 3
- 229910018540 Si C Inorganic materials 0.000 description 2
- 230000000996 additive effect Effects 0.000 description 2
- 238000005275 alloying Methods 0.000 description 2
- 229910010271 silicon carbide Inorganic materials 0.000 description 2
- 229910000655 Killed steel Inorganic materials 0.000 description 1
- CSDREXVUYHZDNP-UHFFFAOYSA-N alumanylidynesilicon Chemical compound [Al].[Si] CSDREXVUYHZDNP-UHFFFAOYSA-N 0.000 description 1
- 229910002056 binary alloy Inorganic materials 0.000 description 1
- 230000000694 effects Effects 0.000 description 1
- 238000002844 melting Methods 0.000 description 1
- 230000008018 melting Effects 0.000 description 1
- 239000000843 powder Substances 0.000 description 1
- 238000003756 stirring Methods 0.000 description 1
- 229910002058 ternary alloy Inorganic materials 0.000 description 1
Landscapes
- Treatment Of Steel In Its Molten State (AREA)
Abstract
Description
【発明の詳細な説明】
ｃｆｔ業上０利用分野］
本発明は、ＭｎＳで代表される硫化物の形態制御におけ
るカルシウムを含む溶鋼の溶製法に関するものである。DETAILED DESCRIPTION OF THE INVENTION Field of Application in CFT Industry The present invention relates to a method for producing molten steel containing calcium in controlling the morphology of sulfides represented by MnS.
［従来の技術］
硫化物の形態制御におけるカルシウムを含む溶鋼の溶製
は、一般に第６図に示すようにＣａ−８ｉ粉のインジェ
クション法（第６図イ）、ＣａワイヤーによるＣａの添
加法（第６図口）が採用されている（日本鉄鋼協会、鉄
と鋼、１９８５．Ｖｏ１７１．１２３頁、他）。又ＲＨ
におけるＮ ｉ −Ｃａ 。[Prior Art] Melting of molten steel containing calcium for controlling the form of sulfides is generally carried out by the injection method of Ca-8i powder (Fig. 6 A), the Ca addition method using Ca wire (Fig. 6 A), as shown in Fig. 6. Figure 6) has been adopted (Iron and Steel Institute of Japan, Tetsu to Hagane, 1985. Vo171, p. 123, etc.). Also RH
N i -Ca at.
Ｃｕ−Ｃａ、Ｆｅ−Ｃａ合金によるＣａの添加法の例も
ある（日本鉄鋼協会、鉄と鋼、１９８５，５９８０）。There are also examples of Ca addition methods using Cu-Ca and Fe-Ca alloys (Iron and Steel Institute of Japan, Tetsu-to-Hagane, 1985, 5980).
［発明が解決しようとする問題点］
しかしながら上述のインジェクション法やＣａワイヤー
添加法には以下の欠点が挙げられる。即ち（１）スラグ
２を攪拌する為にスラグ中の［Ｈ］が溶鋼４に移動して
溶鋼中の［Ｈ］が上昇する。[Problems to be Solved by the Invention] However, the above-mentioned injection method and Ca wire addition method have the following drawbacks. That is, (1) in order to stir the slag 2, [H] in the slag moves to the molten steel 4, and [H] in the molten steel rises.
（２）空気との接触により溶鋼中の［Ｎ］が上昇する。(2) [N] in molten steel increases due to contact with air.
又ＲＨにおけるＮｉ−Ｃａ、Ｃｕ−Ｃａ、Ｆｅ−Ｃａ合
金添加法には以下の欠点が挙げられる。Furthermore, the methods of adding Ni--Ca, Cu--Ca, and Fe--Ca alloys in RH have the following drawbacks.
（３） Ｎ ｉ 、 Ｃｕを含む特殊な合金鋼のｍ製に
しか適用出来ない
（４）Ｆｅ−Ｃａの場合はＣａ歩留が低い。(3) It can only be applied to special alloy steels containing Ni and Cu. (4) In the case of Fe-Ca, the Ca yield is low.
本発明は、上記（１）〜（４）の従来法の欠点を解決す
る。カルシウムを含む溶鋼の溶製法に関する。The present invention solves the drawbacks of the conventional methods (1) to (4) above. This invention relates to a method for producing molten steel containing calcium.
［問題点を解決するための手段］
本発明は（１）１次精錬後の溶鋼にＳｉ−Ｃａ−Ｆｅ系
合金を添加するカルシウムを含む溶鋼の溶製法であり、
（２）Ｓｉ−Ｃａ−Ｆｅ系合金が、Ｓｉを３０〜５０重
量％、Ｃａを５〜１７重量％、Ｆｅを３０〜６５重量％
含有するＳｉ−Ｃａ−Ｆｅ系合金である上記（１）のカ
ルシウムを含む溶鋼の溶製法であり、又（３）Ｓｉ−Ｃ
ａ−Ｆｅ系合金が、Ｓｉを３０〜５０重量％、Ｃａを５
〜１７重量％、Ｆｅを３０〜６５重量％含有し、更にＮ
ｉ、、 Ｃｕｐ Ｍｎ、 Ａ Ｑの１種又は２種以上を
１０重量％以下の範囲で含有するＳｉ−Ｃａ−Ｆｅ系合
金である上記（１）のカルシウムを含む溶鋼の溶製法で
ある。[Means for Solving the Problems] The present invention is (1) a method for producing molten steel containing calcium by adding a Si-Ca-Fe alloy to molten steel after primary refining;
(2) Si-Ca-Fe alloy contains 30-50% by weight of Si, 5-17% by weight of Ca, and 30-65% by weight of Fe.
This is a method for producing molten steel containing calcium as described in (1) above, which is a Si-Ca-Fe alloy containing Si-Ca-Fe, and (3) Si-C
The a-Fe alloy contains 30 to 50% by weight of Si and 5% of Ca.
-17% by weight, contains 30-65% by weight of Fe, and further contains N
This is a method for producing molten steel containing calcium according to (1) above, which is a Si-Ca-Fe alloy containing one or more of Cup Mn, A and Q in an amount of 10% by weight or less.
本発明によれば、三元系のＳｉを含むＣａ合金鉄の使用
であるため、Ｃａ添加を必要とするアルミシリコンキル
ド鋼の全鋼種に適用出来、前記の欠点（３）が解決でき
るものである。又本発明の５Ｌ−Ｃａ−Ｆｅ系合金はＦ
ｅ及びＳｉを含む合金であり、使用の結果は後述するご
と＜Ｃａの歩留が良好であり、その理由は必ずしも明確
ではないが、三元系の結合形態及び比重が比較的大きい
（Ｓｉ−Ｃａの比重約２に対し本発明の５Ｌ−Ｃａ−Ｆ
ｅ系合金は比重約４）ためと推論され、前記の欠点（４
）が解決できるものである。尚、ＲＨ，ＤＨ等で添加す
ればスラグ及び大気と遮断している為、［Ｈ］。According to the present invention, since a Ca alloy iron containing ternary Si is used, it can be applied to all types of aluminum-silicon killed steel that require Ca addition, and the above-mentioned drawback (3) can be solved. be. Furthermore, the 5L-Ca-Fe alloy of the present invention is F
It is an alloy containing E and Si, and the results of its use are as described below.The yield of Ca is good.The reason for this is not necessarily clear, but the ternary bond form and specific gravity are relatively large (Si- The 5L-Ca-F of the present invention has a specific gravity of about 2 for Ca.
It is inferred that this is because the e-based alloy has a specific gravity of approximately 4), and does not have the above-mentioned drawback (4).
) can be solved. Furthermore, if RH, DH, etc. are added, [H] is blocked from the slag and the atmosphere.
［Ｎ］の上昇がなく、前記の欠点（１）、（２）が解決
でき、更に良い結果が得られる。There is no increase in [N], the above-mentioned drawbacks (1) and (2) can be solved, and even better results can be obtained.
［作用］
即ち本発明の特徴とするところは、Ｓ ｉｙ Ｃａ ＋
Ｆｅを主成分とする三元系Ｃａ合金をベースとした合金
の添加法にあり、鋼種を限定することなく、さらには、
［Ｈ］ ［：Ｎ１等不純物を上昇させずに。[Function] That is, the feature of the present invention is that S iy Ca +
It is an alloy addition method based on a ternary Ca alloy with Fe as the main component, without limiting the steel type, and furthermore,
[H] [: Without increasing impurities such as N1.
硫化物の形態制御を行うことができる。The morphology of sulfides can be controlled.
以下本発明を詳細に述べる。第１図（イ）は、ＲＨにお
ける本発明の実施態様例を示す、ＲＨ処理末期において
、本発明のＳｉ−Ｃａ−Ｆｅ系合金６を添加することに
より、Ｃａは溶鋼４に溶解される。The present invention will be described in detail below. FIG. 1(A) shows an embodiment of the present invention in RH. At the end of the RH process, Ca is dissolved in the molten steel 4 by adding the Si-Ca-Fe alloy 6 of the present invention.
この時ＲＨ７の槽内は５０〜１００トルの真空状態にあ
り、溶鋼４は大気と完全に遮断されており、スラグ２を
攪拌しないので、［Ｎ］や［Ｈ］の上昇は無い、第１＠
（ロ）には溶鋼鍋における添加態様を例示する。第２図
は各種のＣａ合金銘柄のＣａ歩留を示す０本発明のＳｉ
−Ｃａ−Ｆｅ系合金はＮｉ−ＣａやＣｕ −Ｃａとは゛
ぼ同等の歩留が得られている。しかしながら第２図の二
元系のＣａ添加物は製造鋼種の制約があり好ましくない
ものである。At this time, the inside of the tank RH7 is in a vacuum state of 50 to 100 torr, the molten steel 4 is completely isolated from the atmosphere, and the slag 2 is not stirred, so there is no rise in [N] or [H]. @
(b) illustrates the addition mode in a molten steel ladle. Figure 2 shows the Ca yield of various Ca alloy brands.
-Ca--Fe alloys have yields that are approximately the same as those of Ni--Ca and Cu--Ca. However, the binary Ca additive shown in FIG. 2 is undesirable because of restrictions on the types of steel manufactured.
第３図はＳｉ−Ｃａ−Ｆｅ中のＣａ含有量とＣａ歩留の
関係を示す。Ｃａ含有量が１７％を超えるとＣａ歩留は
急激に悪化する。又Ｃａが５％未満では添加物が多くな
りすぎて取扱い並びに溶鋼温度低下があり好ましくない
。第４図はＳｉ−Ｃａ−Ｆｅ系合金中のＮｉ、Ｃｕ、Ｍ
ｎ、Ａｌ含有量とＣａ歩留の関係を示す。これらの元素
は１種又は２種以上を１０重量％未満の範囲で含有する
ものであり、Ｎｉ、Ｃｕ、 Ｍｎ、 Ａ Ｑ含有量はい
ずれも若干ながらＣａ歩留がよかった。その理由は必ず
しも明かではないが、Ｃａの合金化が強固になったから
であると推定される。第５図はＳｉ−Ｃａ−Ｆｅ系合金
中のＳｉ含有量とＣａ歩留の関係を示す、Ｓｉは３０％
以上含有すればＣａ歩留が安定しており、Ｃａの合金化
が安定したからであると推定される。しかしＳＬは５０
％を起すと製品中の［Ｓｉ］が許容の上限を越える危険
性がある為、Ｓｉ含有量は５０％以内とすべきである。FIG. 3 shows the relationship between the Ca content in Si-Ca-Fe and the Ca yield. When the Ca content exceeds 17%, the Ca yield deteriorates rapidly. Further, if the Ca content is less than 5%, the amount of additives becomes too large, which is undesirable since handling and temperature of the molten steel decrease. Figure 4 shows Ni, Cu, and M in the Si-Ca-Fe alloy.
n shows the relationship between Al content and Ca yield. One or more of these elements were contained in a range of less than 10% by weight, and the Ca yield was good, although the Ni, Cu, Mn, and AQ contents were all slightly small. Although the reason for this is not necessarily clear, it is presumed that the alloying of Ca has become stronger. Figure 5 shows the relationship between Si content and Ca yield in Si-Ca-Fe alloys, Si is 30%
It is presumed that this is because if the content is above, the Ca yield is stable and the alloying of Ca is stabilized. But SL is 50
%, there is a risk that the [Si] in the product will exceed the permissible upper limit, so the Si content should be within 50%.
第１表は本発明及び従来法におけるＣａ添加前後の溶鋼
の成分の比較を示す、従来法（１）とは第６図（イ）の
方法によるものであり、従来法（２）とは第６図（ロ）
の方法によるものである。第１表にみられるごと〈従来
法（１）、（２）は不純元素である［Ｈ］や［Ｎ］のピ
ックアップが見られるが、本発明には見られない。Table 1 shows a comparison of the composition of molten steel before and after adding Ca in the present invention and the conventional method. Figure 6 (b)
This method is used. As seen in Table 1, the conventional methods (1) and (2) pick up the impurity elements [H] and [N], but they do not appear in the present invention.
以上述べたように、本発明はＣａの添加物の形態が、従
来が二元系であるのに対しＳｉ−Ｃａ−Ｆｅ系の三元系
合金をベースとしたものであることを第 １ 表
最大の特徴としており、安価であり、又結合形態及び比
重からによると推定されるが、添加歩留が向上する。又
本発明でＮｉ、Ｃｕ、Ｍｎ、ＡΩ等を含有するＳｉ−Ｃ
ａ−Ｆｅ系合金はＮｉ、 Ｃｕ、 Ｍｎ。As described above, in the present invention, the form of the Ca additive is based on a Si-Ca-Fe ternary alloy, as opposed to the conventional binary system, as shown in Table 1. The most important feature is that it is inexpensive, and it improves the addition yield, which is presumed to be due to the bonding form and specific gravity. In addition, in the present invention, Si-C containing Ni, Cu, Mn, AΩ, etc.
The a-Fe alloys include Ni, Cu, and Mn.
ＡＭ等の添加が溶鋼の鋼種として望ましい場合に使用す
るもので、通常は特殊元素を含まない５Ｌ−Ｃａ−Ｆｅ
系合金を使用するために、鋼種上の制約も少なく、操業
上も有利に使用される。It is used when addition of AM etc. is desirable for the steel type of molten steel, and usually 5L-Ca-Fe which does not contain special elements.
Because it uses a series alloy, there are fewer restrictions on the steel type, and it is advantageous in terms of operation.
［実施例コ
次にＲＨ真空脱ガス装置における本発明の具体的な実施
例を述べる。[Example] Next, a specific example of the present invention in an RH vacuum degassing apparatus will be described.
１次精錬後の１５０トンの溶鋼をＲＨ真空脱ガス装置に
て脱ガスして成分調整した［Ｃ］ ＝０．１０％、［Ｓ
ｉｌ ＝０．０４％、［Ｍｎｌ ＝１．０６％。After primary refining, 150 tons of molten steel was degassed using an RH vacuum degassing device to adjust the composition [C] = 0.10%, [S
il = 0.04%, [Mnl = 1.06%.
［ＡＩ２］ ＝０．０３５％ｔ ［Ｈ］ ＝１．０ｐ
ｐｍ。[AI2] =0.035%t [H] =1.0p
p.m.
［０１＝２３ｐｐｍｔ ［Ｎコ ＝ ２５ｐｐｍｅ
［Ｃａｌ ＝Ｏｐｐｍの溶鋼に、Ｃａ＝１０％、５
Ｌ＝４０％含む本発明の５Ｌ−Ｃａ−Ｆｅ系合金を２
、７５Ｋｇ／ を投入し、１分間溶鋼を還流して処理を
終了し、［Ｃ］＝０．１０％、［Ｓｉｌ ＝０．１５％
、 ［Ｍｎｌ ＝１゜０６％、［Ａｌ ＝０．０３４
％、［Ｈ］＝１．０ＰＰｍｙ ［０］ ＝２０ｐｐｍ
、 ［Ｎ］ ＝２５ｐｐｍ、 ［Ｃａ］＝２６ｐｐ
−の溶鋼を得た
［発明の効果］
前述のように、本発明によれば、Ｆｅ、 ＳＬ。[01 = 23ppmt [N = 25ppm
[For molten steel with Cal = Oppm, Ca = 10%, 5
The 5L-Ca-Fe alloy of the present invention containing L=40% is
, 75Kg/ , refluxed the molten steel for 1 minute to complete the treatment, [C] = 0.10%, [Sil = 0.15%
, [Mnl = 1°06%, [Al = 0.034
%, [H] = 1.0PPmy [0] = 20ppm
, [N] = 25ppm, [Ca] = 26pp
- [Effect of the Invention] As described above, according to the present invention, Fe, SL.
Ｃａを主成分とするＣａ合金を溶鋼中に添加することに
より、鋼種を限定することなく、硫化物の形態制御を行
うことが出来る。さらには、インジェクション法、ｃ８
ワイヤー法との比較において。By adding a Ca alloy containing Ca as a main component to molten steel, the form of sulfides can be controlled without limiting the type of steel. Furthermore, injection method, c8
In comparison with the wire method.
特別な設備が不要である為、処理コストも安価であり、
［Ｈ］ ［Ｎ］等不純元素のピックアップも無い。Processing costs are low as no special equipment is required.
There is no pickup of impurity elements such as [H] and [N].
第１図は本発明の実施態様例を示す図で、第１図（イ）
はＲＨにおける本発明の実施態様、第１図（ロ）は溶鋼
鍋における本発明の実施態様である。
第２図は各種のＣａ合金銘柄のＣａ歩留を示す図。
第３図は５Ｌ−Ｃａ−Ｆｅ合金中のＣａ含有量とＣａ歩
留を示す図。
第４図は５Ｌ−Ｃａ−Ｆｅ合金中の、 Ｎｉ、 Ｃｕ、
Ｍｎ。
ＡΩの含有量とＣａ歩留を示す図。
第５図は５Ｌ−Ｃａ−Ｆｅ合金中のＳＬ含有量とＣａ歩
留を示す図。
第６図は、従来の溶鋼へのＣａ添加法を示す図である。FIG. 1 is a diagram showing an embodiment of the present invention, and FIG.
1 shows an embodiment of the present invention in a RH, and FIG. 1(b) shows an embodiment of the present invention in a molten steel ladle. FIG. 2 is a diagram showing the Ca yield of various Ca alloy brands. FIG. 3 is a diagram showing the Ca content and Ca yield in the 5L-Ca-Fe alloy. Figure 4 shows Ni, Cu, in 5L-Ca-Fe alloy.
Mn. The figure which shows content of AΩ and Ca yield. FIG. 5 is a diagram showing the SL content and Ca yield in the 5L-Ca-Fe alloy. FIG. 6 is a diagram showing a conventional method of adding Ca to molten steel.
Claims (3)
加することを特徴とするカルシウムを含む溶鋼の溶製法(1) A method for producing molten steel containing calcium, which is characterized by adding a Si-Ca-Fe alloy to molten steel after primary refining.
量％、Ｃａを５〜１７重量％、Ｆｅを３０〜６５重量％
含有するＳｉ−Ｃａ−Ｆｅ系合金である特許請求の範囲
第１項に記載の、カルシウムを含む溶鋼の溶製法(2) Si-Ca-Fe alloy contains 30-50% by weight of Si, 5-17% by weight of Ca, and 30-65% by weight of Fe.
A method for producing molten steel containing calcium according to claim 1, which is a Si-Ca-Fe alloy containing calcium.
量％、Ｃａを５〜１７重量％、Ｆｅを３０〜６５重量％
含有し、更にＮｉ、Ｃｕ、Ｍｎ、Ａｌの１種又は２種以
上を１０重量％以下の範囲で含有するＳｉ−Ｃａ−Ｆｅ
系合金である特許請求の範囲第１項に記載のカルシウム
を含む溶鋼の溶製法(3) Si-Ca-Fe alloy contains 30-50% by weight of Si, 5-17% by weight of Ca, and 30-65% by weight of Fe.
Si-Ca-Fe containing one or more of Ni, Cu, Mn, and Al in an amount of 10% by weight or less
A method for producing molten steel containing calcium as set forth in claim 1, which is a based alloy.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP17278686A JPS6333514A (en) | 1986-07-24 | 1986-07-24 | Manufacture of molten steel containing calcium by refining |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP17278686A JPS6333514A (en) | 1986-07-24 | 1986-07-24 | Manufacture of molten steel containing calcium by refining |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| JPS6333514A true JPS6333514A (en) | 1988-02-13 |
| JPH0371483B2 JPH0371483B2 (en) | 1991-11-13 |
Family
ID=15948326
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP17278686A Granted JPS6333514A (en) | 1986-07-24 | 1986-07-24 | Manufacture of molten steel containing calcium by refining |
Country Status (1)
| Country | Link |
|---|---|
| JP (1) | JPS6333514A (en) |
Cited By (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN100343398C (en) * | 2005-12-16 | 2007-10-17 | 安阳市龙泉华贯冶金厂 | Method for preparing silicon aluminium calcium composite deoxidant |
| CN100359024C (en) * | 2005-11-10 | 2008-01-02 | 安康市光大铁合金有限公司 | Low content aluminium silicon cacium barium alloy and its manufacture method |
| CN100398670C (en) * | 2006-08-31 | 2008-07-02 | 杨堃 | Compound deoxidizer in calcium series |
| CN102134630A (en) * | 2011-04-07 | 2011-07-27 | 河北钢铁股份有限公司唐山分公司 | Calcium treatment method for refining molten steel under vacuum |
| JP2011524462A (en) * | 2008-04-22 | 2011-09-01 | ナショナル・センター・オブ・コンプレックス・プロセッシング・オブ・ミネラル・ロー・マテリアルズ・オブ・リパブリック・オブ・カザフスタン・アールエスイー | Alloy "Kazakhstansky" for reducing and doping steel |
| CN110042202A (en) * | 2019-04-22 | 2019-07-23 | 南京钢铁股份有限公司 | A kind of RH refining furnace vacuum process calcium treating method |
Citations (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPS515224A (en) * | 1974-07-03 | 1976-01-16 | Nippon Steel Corp | Koseijokono seizohoho |
| JPS5184717A (en) * | 1975-01-16 | 1976-07-24 | Chuo Denki Kogyo Co | KARUSHIUM UTENKAYO GOKIN |
| JPS586945A (en) * | 1981-07-06 | 1983-01-14 | Aikoo Kk | Treatment of molten metal |
| JPS6184315A (en) * | 1984-09-28 | 1986-04-28 | Nippon Kokan Kk <Nkk> | Method for refining molten steel in ladle |
-
1986
- 1986-07-24 JP JP17278686A patent/JPS6333514A/en active Granted
Patent Citations (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPS515224A (en) * | 1974-07-03 | 1976-01-16 | Nippon Steel Corp | Koseijokono seizohoho |
| JPS5184717A (en) * | 1975-01-16 | 1976-07-24 | Chuo Denki Kogyo Co | KARUSHIUM UTENKAYO GOKIN |
| JPS586945A (en) * | 1981-07-06 | 1983-01-14 | Aikoo Kk | Treatment of molten metal |
| JPS6184315A (en) * | 1984-09-28 | 1986-04-28 | Nippon Kokan Kk <Nkk> | Method for refining molten steel in ladle |
Cited By (7)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN100359024C (en) * | 2005-11-10 | 2008-01-02 | 安康市光大铁合金有限公司 | Low content aluminium silicon cacium barium alloy and its manufacture method |
| CN100343398C (en) * | 2005-12-16 | 2007-10-17 | 安阳市龙泉华贯冶金厂 | Method for preparing silicon aluminium calcium composite deoxidant |
| CN100398670C (en) * | 2006-08-31 | 2008-07-02 | 杨堃 | Compound deoxidizer in calcium series |
| JP2011524462A (en) * | 2008-04-22 | 2011-09-01 | ナショナル・センター・オブ・コンプレックス・プロセッシング・オブ・ミネラル・ロー・マテリアルズ・オブ・リパブリック・オブ・カザフスタン・アールエスイー | Alloy "Kazakhstansky" for reducing and doping steel |
| KR101493551B1 (en) * | 2008-04-22 | 2015-02-13 | 내셔널 센터 오브 콤플렉스 프로세싱 오브 미네랄 로 메터리얼즈 오브 리퍼블릭 오브 카자흐스탄 알에스이 | Alloy ＂kazakhstanski＂ for reducing and doping steel |
| CN102134630A (en) * | 2011-04-07 | 2011-07-27 | 河北钢铁股份有限公司唐山分公司 | Calcium treatment method for refining molten steel under vacuum |
| CN110042202A (en) * | 2019-04-22 | 2019-07-23 | 南京钢铁股份有限公司 | A kind of RH refining furnace vacuum process calcium treating method |
Also Published As
| Publication number | Publication date |
|---|---|
| JPH0371483B2 (en) | 1991-11-13 |
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Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| LAPS | Cancellation because of no payment of annual fees |