JPS58141320A - Metal refining agent - Google Patents
Metal refining agentInfo
- Publication number
- JPS58141320A JPS58141320A JP1969782A JP1969782A JPS58141320A JP S58141320 A JPS58141320 A JP S58141320A JP 1969782 A JP1969782 A JP 1969782A JP 1969782 A JP1969782 A JP 1969782A JP S58141320 A JPS58141320 A JP S58141320A
- Authority
- JP
- Japan
- Prior art keywords
- alloy
- refining agent
- phase
- molten steel
- flux
- 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
-
- C—CHEMISTRY; METALLURGY
- C21—METALLURGY OF IRON
- C21C—PROCESSING OF PIG-IRON, e.g. REFINING, MANUFACTURE OF WROUGHT-IRON OR STEEL; TREATMENT IN MOLTEN STATE OF FERROUS ALLOYS
- C21C7/00—Treating molten ferrous alloys, e.g. steel, not covered by groups C21C1/00 - C21C5/00
- C21C7/04—Removing impurities by adding a treating agent
Landscapes
- Chemical & Material Sciences (AREA)
- Engineering & Computer Science (AREA)
- Materials Engineering (AREA)
- Metallurgy (AREA)
- Organic Chemistry (AREA)
- Treatment Of Steel In Its Molten State (AREA)
- Manufacture And Refinement Of Metals (AREA)
Abstract
Description
【発明の詳細な説明】
本発明は溶鋼などの溶融金属の脱酸、脱硫、脱燐などに
用いる精錬剤に関する。DETAILED DESCRIPTION OF THE INVENTION The present invention relates to a refining agent used for deoxidizing, desulfurizing, dephosphorizing, etc. molten metal such as molten steel.
近年、極めて苛酷な環境条件において高度の信頼性を有
するいわゆる高清浄鋼に対する需要は一段と増大しつつ
ある。In recent years, the demand for so-called high-cleanliness steel, which has a high degree of reliability under extremely harsh environmental conditions, has been increasing further.
これら高清浄鋼は一般に溶銑段階で脱硫、脱燐精錬し、
さらに溶鋼を炉外精錬することによシ製造される。溶鋼
炉外精錬の目的とするところは高度な脱硫と主としてＡ
Ｊ２Ｏ，系介在物の除去による゛脱酸や介在物の形態ｉ
ｊ御などにあり、さらに脱燐を目的に加える場合もある
。These highly clean steels are generally refined by desulfurization and dephosphorization at the hot metal stage.
Furthermore, it is manufactured by refining molten steel outside the furnace. The purpose of refining outside the melting furnace is advanced desulfurization and mainly A.
``Deoxidation and formation of inclusions by removing J2O and system inclusions''
In some cases, it is added for the purpose of dephosphorization.
このような炉外精錬に使用される精錬剤はその目的によ
って細部は異なるが、ＣａＯを主体とするいわゆるフラ
ックスとＣａ系金属添加剤の併用が一般的である。特に
介在物の形態制御には金属Ｃａあるいはその合金の使用
が必須と云われている。Although the details of the refining agent used in such out-of-furnace refining differ depending on the purpose, it is common to use a combination of a so-called flux mainly composed of CaO and a Ca-based metal additive. In particular, it is said that the use of metallic Ca or its alloy is essential for controlling the form of inclusions.
金属Ｃａあるいはその合金添加剤はＣａＳ ｉ合金と、
Ｃａ又はＣａ−ｔ４／の鉄又はアルミのクラッドワイヤ
ーが一般に用いられている。前者は比較的安価であるが
Ｃａの添加効率が悪く特に５ｉ−１ｅｓｓＡ７キルド鋼
には使えない欠点がある。一方クラッドワイヤーは添加
効率は優れているが、高価なため使用に限界がある。Metallic Ca or its alloy additive is a CaSi alloy,
Ca or Ca-t4/ iron or aluminum clad wires are commonly used. Although the former is relatively inexpensive, it has the disadvantage that it has poor Ca addition efficiency and cannot be used particularly for 5i-1ess A7 killed steel. On the other hand, clad wire has excellent dosing efficiency, but its use is limited because it is expensive.
ＣａＯを主体とするフラックスはＣａＯにＡＡ’２０ｓ
、ＣａＦ、０１種又は２種を混合したものが一般的であ
る。ただし、フラックスのみでは介在物形態制御ができ
ないので、前記金属系添加剤と併用して使用される。The flux mainly composed of CaO is AA'20s to CaO.
, CaF, type 01, or a mixture of the two types is generally used. However, since flux alone cannot control the morphology of inclusions, it is used in combination with the metal additives mentioned above.
本発明は溶鋼中で高い蒸気圧を有するＣａの蒸発損失を
できるだけ抑えることによシ、効率よく溶鋼へ作用させ
脱酸、脱硫、脱燐および介在物の形態制御効果を高める
ことを目的とした金属精錬剤を提供するものである。The purpose of the present invention is to suppress the evaporation loss of Ca, which has a high vapor pressure in molten steel, to efficiently act on the molten steel and enhance the effects of deoxidation, desulfurization, dephosphorization, and control of the form of inclusions. It provides metal refining agents.
溶鋼へのＣａ添加の各種の実験の、中でＣａ系合金とＣ
ａＯを含むフラッフを一体に結合させて精錬剤を構成し
、これを溶鋼に添加した場合にはＣａの蒸発損失を極端
に低く抑えることができ、しかもＣａ系合金と７ラツク
スとの混合度を増せば増す程その効果が上ることを知見
し、本発明に至った。In various experiments on Ca addition to molten steel, Ca-based alloys and C
When fluff containing aO is combined together to form a refining agent and added to molten steel, the evaporation loss of Ca can be suppressed to an extremely low level. It was discovered that the more the amount is increased, the better the effect becomes, and this led to the present invention.
即ち、本発明はＣａ−）Ｊ合金、Ｃａｂ、 Ａ４０ｓを
主成分とし、これらが一体に結合した粉・粒状ないしは
塊状物から成る金属精錬剤である。That is, the present invention is a metal refining agent that has Ca-)J alloy, Cab, and A40s as main components and is composed of powder, granules, or lumps in which these are combined together.
以下本発明の詳細な説明する。The present invention will be explained in detail below.
本発明の精錬剤はＣａ−Ａ１合金、ＣａＯ１Ａ／！Ａを
主成分とする。そしてこれらが７０％（重量係、以下同
じ）以上含有していることが好ましい。前記三成分以外
に好ましい成分として含有させることができる代表的な
ものは、 ＣａＦ、であｐ、３０ｑ６以下の範囲で用い
るのがよい。ＣａＦ、＃ｉミツラックス中では独立して
存在するが、Ｃａ９Ｍ２Ｏ３が大きくなるに従がい、そ
の含有量を増すのが効果的である。ＣａＦ、は溶鋼への
添加時、フラックス相の滓化促進に有効に作用する。し
かし３０チを越えて添加しても効果が飽和してしまうた
め３０係以下で使用するのがよい。The refining agent of the present invention is Ca-A1 alloy, CaO1A/! The main component is A. It is preferable that these components contain 70% or more (by weight, the same applies hereinafter). In addition to the three components mentioned above, typical components that can be preferably contained include CaF, which is preferably used in a p range of 30q6 or less. CaF exists independently in #i Mithrax, but it is effective to increase its content as Ca9M2O3 increases. CaF, when added to molten steel, effectively acts to promote slag formation of the flux phase. However, even if it is added in excess of 30 parts, the effect will be saturated, so it is better to use it in amounts below 30 parts.
以上望ましい成分範囲を示せばＣａ−ＡＪ合金２０〜５
０チ、ＣａＯ１Ａ／！Ａ、８０〜５０ ％、ＣａＦ！９
〜３０％である。If the desirable component range is shown above, Ca-AJ alloy 20-5
0chi, CaO1A/! A, 80-50%, CaF! 9
~30%.
そしてＣａ−Ａ１合金中のＣａ含有量は２０〜５０チ、
フラックス相中のＣａＯ／Ａ４０３重量比は０．９〜５
．００間とするのが最も適する。Ｃａ−Ａ１合金が２０
％未満ではこの合金による精錬効果が下がり、精錬剤の
使用量が増える。また５０％を越えるとフラックスの量
が相対的に減ることによるＣａの蒸発抑制作用が低下す
る。And the Ca content in the Ca-A1 alloy is 20 to 50 chi,
CaO/A403 weight ratio in flux phase is 0.9-5
．． The most suitable value is between 00 and 00. Ca-A1 alloy is 20
If it is less than %, the refining effect of this alloy will decrease and the amount of refining agent used will increase. Moreover, when it exceeds 50%, the effect of inhibiting Ca evaporation due to a relative decrease in the amount of flux decreases.
Ｃａ合金中のＣａ含有量が２０〜５０チが特に適する理
由はＣａが２０４よシ低くなると付随して入るＡｌ量が
多くなり、鋼中にＭが残留したり、またＣａの精錬効果
が下る等の理由で好ましくなく、また５０％を越えると
Ｃａの蒸気圧が高くなるからである。またＣａ合金を後
述するＣａＯのＭ還元法で製造する場合はＣａを５０％
以上とすることは困難である。The reason why a Ca content of 20 to 50 in the Ca alloy is particularly suitable is that when the Ca content is lower than 204, the amount of Al accompanying it increases, causing M to remain in the steel and reducing the refining effect of Ca. This is not preferable for the following reasons, and if it exceeds 50%, the vapor pressure of Ca increases. In addition, when producing Ca alloy by the CaO M reduction method described later, Ca is 50%
It is difficult to do more than that.
ＣａＯ１Ａ／！Ａ ０ｇ重量比が０．９〜５．０が特に
適する理由は０．９未満だと脱硫に効（Ｃａ０ｇ分が少
なくなシ、脱硫能が下が９、また５を越えると融点が高
過ぎて滓化が阻害される。CaO1A/! A: The reason why a 0g weight ratio of 0.9 to 5.0 is particularly suitable is that when it is less than 0.9, it is effective for desulfurization (the Ca0g content is low, and the desulfurization ability is lower than 9, and when it exceeds 5, the melting point is too high). This prevents slag formation.
なお、上記成分の外、精錬剤の各成分の結合促進あるい
は精錬効果を向上させるなどの目的でＣａＣ＆などの塩
化物、Ｎａ２Ｏ，などの酸化物、Ｓｉ。In addition to the above-mentioned components, chlorides such as CaC&, oxides such as Na2O, and Si are added for the purpose of promoting the bonding of each component of the refining agent or improving the refining effect.
Ｍｇ、Ｂａ％Ｎｉ１ 希土類元素あるいはその酸化物
などの含量で１０チ以下の範囲で含有させてもよい。こ
れらは金属は主として合金相を、酸化物はフラックス相
を形成する。Mg, Ba%Ni1 Rare earth elements or their oxides may be contained in an amount of 10 or less. These metals mainly form an alloy phase, and the oxides form a flux phase.
本発明においてフラックス相の重要な役割は精錬剤を溶
鋼に添加した場合Ｃａ−）４合金相の溶鋼への溶解を適
度に制御することである。即ち、スラックス相はＣａ−
ＡＪＩ合金が添加された際瞬時に溶鋼へ作用するととＫ
よる急激な蒸発揮散を起させることなく、徐々に溶鋼へ
溶解せしめることＫよシ充分効率よ（Ｃａを作用させる
役割を持つものである。またフラックス相は脱硫及び溶
鋼中に介在しているＭ２Ｏ，等の脱酸生成物を効果的に
捕捉し、除去するものである。In the present invention, the important role of the flux phase is to appropriately control the dissolution of the Ca-)4 alloy phase into the molten steel when a refining agent is added to the molten steel. That is, the slack phase is Ca-
When AJI alloy is added, it instantly acts on molten steel.
The flux phase has the role of allowing Ca to act on the molten steel gradually without causing rapid evaporation or evaporation. It effectively captures and removes deoxidized products such as .
この役割を果すため本発明の精錬剤は合金相とフラック
ス相とを一体に結合させた構造とした。In order to fulfill this role, the refining agent of the present invention has a structure in which an alloy phase and a flux phase are combined together.
即ち精錬剤を構成する各々の粒子或いはブリケットのよ
うな塊状物がそれ自体合金相とフラックス相が一体に結
合していることを意味する。That is, each particle or agglomerate such as a briquette constituting the refining agent itself has an alloy phase and a flux phase combined together.
このように精錬剤を構成することにより、溶鋼に添加さ
れた際、各粒子或いは塊状物はその合金相の表面あるい
は周辺に７ラツクス相が介在しているので、合金相が急
激に溶鋼と接触するのが妨げられ、合金相の溶解が徐々
に進行する。従って、精錬剤は少なくとも溶鋼に添加さ
れるまで合金相とフラックス相とが一体に結合している
ことが必要である。この精錬剤には合金からなる粒子と
フラックスからなる粒子とが１次結合剤等により結合さ
れたものも含む。塊状物についても同様である。１凍結
合剤は精錬剤が溶鋼に添加された際、直ちに分解し、粒
子は合金相とフラックス相に分離するが、合金相の周辺
にはスラックス相が存在し、合金相がフラックス粒希釈
されたような状態となるので、合金粒子単独で添加した
場合に比べＣａの蒸発揮散が少なくなる。By configuring the refining agent in this way, when added to molten steel, each particle or agglomerate has a 7 lux phase intervening on or around the alloy phase, so the alloy phase rapidly contacts the molten steel. The dissolution of the alloy phase gradually progresses. Therefore, it is necessary that the alloy phase and flux phase of the refining agent are integrally combined at least until the refining agent is added to molten steel. This refining agent also includes particles made of an alloy and particles made of a flux bound together by a primary binder or the like. The same applies to lumps. 1 When the refining agent is added to molten steel, the frozen mixture decomposes immediately and the particles separate into an alloy phase and a flux phase, but a slack phase exists around the alloy phase, and the alloy phase is diluted with flux particles. As a result, the evaporation and transpiration of Ca is reduced compared to when alloy particles are added alone.
精錬剤の添加時における合金相のフラックス相による希
釈化については合金粒子とフラックス粒子を単に混合し
て使用することも考えられるが、取扱い中あるいは添加
時に偏析を起し易く、各粒子が均一混合した状態で使用
することはむづかしく、合金相の局所的な蒸発揮散が避
けられない。Regarding the dilution of the alloy phase by the flux phase when adding a refining agent, it is possible to simply mix the alloy particles and flux particles, but this tends to cause segregation during handling or addition, making it difficult for each particle to be uniformly mixed. It is difficult to use the alloy under such conditions, and local evaporation and transpiration of the alloy phase cannot be avoided.
本発明の精錬剤は前記のように少なくとも溶鋼に入る直
前まで１体に合金相と７ラツクス相が結合して健ること
か必要であるが、望ましくはこれらが焼結、固溶、拡散
等のような形で結合していることである。さらに望まし
くは合金相とフラックス相がどちらか一方或いは双方が
互いにマトリックス相を形成し、これらが複雑に絡み合
って１体に前記した焼結等により結合していることであ
る。また合金相とフラックス相はできるだけ均一に混合
分散していることが望ましい。特に精錬剤がある程度以
上大きい場合、この均一分散性が重要になる。ブリケッ
トやある程度大きな粒の場合、この分散性はこれらを粉
砕して調べることができる。例えば１閣を越える精錬剤
について、それを粉砕して０．５〜１．０真のものを取
り出して調べると、均一分散性のよい精錬剤はその７０
％以上が合金相と７２ツクス相が結合したものからなっ
ている。As mentioned above, it is necessary for the refining agent of the present invention that the alloy phase and the 7 lux phase are combined into one body at least immediately before entering the molten steel, but it is preferable that these phases are combined by sintering, solid solution, diffusion, etc. They are connected in the following way. More preferably, one or both of the alloy phase and the flux phase mutually form a matrix phase, and these are intricately intertwined and bonded together by the above-mentioned sintering or the like. Further, it is desirable that the alloy phase and the flux phase are mixed and dispersed as uniformly as possible. Particularly when the refining agent is larger than a certain level, this uniform dispersibility becomes important. In the case of briquettes or rather large particles, the dispersibility can be examined by crushing them. For example, if you take a refining agent that has more than 1 kaku, and examine it by crushing it and taking out the 0.5 to 1.0 particles, you will find that the refining agent with good uniform dispersibility is 70.
More than % is composed of a combination of an alloy phase and a 72Tx phase.
精錬剤が１ｍ＋より小さいものについては上記した均一
分散性は大きな問題にはならず、合金相と７ラツクス相
が結合していればよい。結合は一次結合よシ前記した焼
結、固溶等によるものが望ましい。When the refining agent is smaller than 1 m+, the uniform dispersibility described above is not a big problem, and it is sufficient that the alloy phase and the 7 lux phase are combined. The bonding is preferably by primary bonding or by sintering, solid solution, etc. as described above.
本発明の精錬剤のサイズは１ｆｉ以下のような粒子（粉
末）からブリケット、塊体のものまで含む。The size of the refining agent of the present invention ranges from particles (powder) of 1 fi or less to briquettes and lumps.
粉末は通常インジエク□レヨン法で添加される場合に使
用されるものである。ブリケ゛ット、塊体の大きさは特
に制限なく、取扱い上等よフ適宜定める。The powder is normally used when added by the Injiek □ Rayon method. The size of the briquettes and lumps is not particularly limited and is determined as appropriate based on handling considerations.
次に本発明の精錬剤の製造法について説明する。Next, a method for producing the refining agent of the present invention will be explained.
精錬剤が合金相と７ラツクス相の一次結合よりなるもの
は、両者の粉末を混合し、有機質結合剤を使用してブリ
ケットマシン等によって成形する方法や、小さい精錬剤
の場合では合金粒子の表面に７ラツクス粉末をまぶし、
造粒する方法でつくることができる。If the refining agent consists of a primary combination of an alloy phase and a 7 lux phase, there is a method in which the powders of both are mixed and molded using an organic binder using a briquetting machine, or in the case of a small refining agent, the surface of the alloy particles is mixed. Sprinkle 7 lux powder on the
It can be made by granulation.
次に本発明の望ましい精錬剤である合金相と７ラツクス
相が焼結等により結合しているものについて、その製造
法の１例について説明する。Next, an example of a manufacturing method for a desirable refining agent of the present invention in which an alloy phase and a 7 lux phase are combined by sintering or the like will be described.
原料はＣａＯを主体とする酸化物とＭを主体とする金属
還元剤である。前者はＣａＯ単独又はこれに後述する酸
化物、塩化物、弗化物等を混合したもの、後者はＭ単独
又は後述するＳｉ２等をＭに混合、又はＡＩと合金にし
て用いる。これらを粉末にし、ブリケットにして反応さ
せるが、反応はＡｌが溶融し一酸化物に浸透するので、
両原料とも粒度はあま９重要でないが、１ｍ以下程度が
好ましい。ブリケットにするＫはブリケットマシン等で
圧縮成形してもよく、マた澱粉、ＣＭＣ等の１凍結合剤
を加えて造粒してもよい。従って、本発明におけるブリ
ケット成形にはこれら粒状、塊状等すべての成形体を含
む。ブリケットの大きさは特に制限ないが、５〜５０ｍ
＋の範囲が適当である。The raw materials are an oxide mainly composed of CaO and a metal reducing agent mainly composed of M. The former uses CaO alone or a mixture of oxides, chlorides, fluorides, etc., which will be described later, and the latter uses M alone, or M is mixed with Si2, etc., which will be described later, or alloyed with AI. These are powdered, made into briquettes, and reacted, but the reaction involves melting Al and penetrating the monoxide.
The particle size of both raw materials is not critical, but is preferably about 1 m or less. K to be made into briquettes may be compression-molded using a briquette machine or the like, or may be granulated by adding a frozen mixture of mata starch, CMC, etc. Therefore, briquette molding in the present invention includes all of these granular, block-like, and other molded products. There is no particular limit to the size of the briquettes, but 5 to 50 m.
A range of + is appropriate.
酸化物と還元剤の配合は前記した精錬剤の組成つパ に応じ、次の反応式に基すいて定める。The composition of the oxide and reducing agent depends on the composition and performance of the refining agent described above. It is determined based on the following reaction formula.
３ＣａＯ＋２ＡＡ’ →ａｃａ ＋ ＡＪ２０Ｂ ＋
＋＋＋＋＋ （１）生成したＣａは原料Ｍと合金に、Ａ
ＪｔＯｓ ＦｉＣａＯと結合してフラックスになる。Ｃ
ａをＡｌと合金化することによりＣａの蒸発逸散が抑制
される。3CaO+2AA' → aca + AJ20B +
++++++ (1) The generated Ca is mixed with raw material M and alloyed with A
JtOs combines with FiCaO to become a flux. C
By alloying a with Al, evaporation and loss of Ca is suppressed.
これよりＣａＦ、を除ぐ前記した望ましい組成であるＣ
ａ−ｋ１合金（Ｃａ ２０〜５０重量ｑ６）２０〜５０
チ、ｃａＯ＋Ａｆｆｌ、Ｏｓ （Ｃａｂ／Ａ４０ａ
０．９〜５．０重量比）８０〜５０％ではＣａの蒸発も
考慮し、原料０ＣａＯとＭは重量比でＣａｂ／Ａｌｆ：
０．５〜４．０の範囲で選択すればよい。From this, the above-mentioned desirable composition excluding CaF, C
a-k1 alloy (Ca 20-50 weight q6) 20-50
Chi, caO+Affl, Os (Cab/A40a
0.9 to 5.0 weight ratio) 80 to 50%, taking into account the evaporation of Ca, the raw materials 0CaO and M are Cab/Alf in weight ratio:
It may be selected within the range of 0.5 to 4.0.
また精錬剤にＣａＦ２、ＣａＣｌ２、Ｎａ、０１Ｓｉｎ
、、Ｓ（Ｍ＆Ｂａ％Ｎｉ１希土類元素又はこの酸化物を
含有させる場合はこれらの元素あるいは化合物を原料に
配合すればよい。化合物の場合、加熱過程で１部Ｍ或い
はＣａにより還元されるものがあっても、生成した金属
が目的とする精錬剤において有害でない限シ支障はない
。これらは金属の場合は主としてＣａ−）Ｊと合金に、
化合物ではフラックス成分となる。In addition, CaF2, CaCl2, Na, 01Sin are used as refining agents.
,,S(M&Ba%Ni1) When containing rare earth elements or their oxides, these elements or compounds may be blended into the raw materials.In the case of compounds, some of them may be reduced by M or Ca during the heating process. However, there is no problem as long as the metal produced is not harmful to the target refining agent.
In compounds, it becomes a flux component.
焼成は８５０〜１３５０℃、好ましくは１０００〜１２
００℃でアルゴンなどの不活性雰囲気下がよい。Firing at 850-1350℃, preferably 1000-12
Preferably, the temperature is 00°C and an inert atmosphere such as argon is used.
大気中や窒素雰囲気でも不可能ではないが窒化アルミ等
が生成したシして反応が抑制されるのでめまシ好ましく
ない。８５０℃未満では反応が起らず、１３５０℃を越
えても反応上の利点がないばかシかＣａの蒸発が多くな
る。Although it is possible to use air or nitrogen atmosphere, it is not preferable because aluminum nitride and the like will be generated and the reaction will be suppressed. If the temperature is lower than 850°C, no reaction will occur, and if the temperature exceeds 1350°C, there will be no reaction advantage, and a large amount of Ca will evaporate.
雰囲気の圧力は反応促進の面からある程度減圧したＦ）
、Ｃａなどの蒸発を抑える目的で若干加圧することもで
きる。The pressure of the atmosphere was reduced to some extent in order to promote the reactionF)
, Ca, etc. can be slightly pressurized for the purpose of suppressing evaporation.
焼成炉は雰囲気の実質的コントロールができれば、その
形式Ｆｉ％に制限されない。例えば横型台車炉、竪型シ
ャフト炉、レトルト炉などいずれでもよいし、反応促進
や連続操業などの目的のために転動などの手段で原料を
移動させることもできる。The type of firing furnace is not limited to Fi% as long as the atmosphere can be substantially controlled. For example, a horizontal bogie furnace, a vertical shaft furnace, a retort furnace, etc. may be used, and the raw material may be moved by means such as rolling for the purpose of promoting the reaction or continuous operation.
焼成後のブリケットはそのままでも精錬剤として使用で
きるが、破砕して粒状とし、或いはさらに粉砕して粒子
粉末にして使用することができる。The briquettes after firing can be used as they are as a refining agent, but they can also be crushed into granules or further crushed into granular powder.
粉砕しても各粒子は大部分合金相と７ラツクス相が一体
となって結合している。Even after pulverization, most of each particle is made up of an alloy phase and a 7-lux phase combined together.
これを光学顕微鏡、Ｘ線マイクロアナライザーなどで調
査すると極めて微細なＣａＡｌ２やＣａ４４などのＣａ
−）４合金相と１２ＣａＯ・７Ｍ２０．やＣａＯなどの
７ラツクス相が複雑に混ざシ合っているのが認められる
。When this is investigated using an optical microscope or an X-ray microanalyzer, extremely fine CaAl2, Ca44, etc.
-) 4 alloy phases and 12CaO・7M20. A complex mixture of seven lattice phases such as and CaO is observed.
従来、上記した製造法に関連するものとしてＣａ−Ａ１
合金の製造法はいくつか提案されているが、Ｍをブリケ
ットにＬ、１５００〜１６００℃の高温下で反応させ、
Ｃａ−ＡＪ金合金スラグを溶融分離する方法もあるが、
高温かつ大気中であるため、ＭやＣａ の蒸発、酸化、
窒化損失が大きく工業的規模での実用化は困難であった
。Conventionally, Ca-A1 has been used as a material related to the above-mentioned production method.
Several methods have been proposed for producing the alloy, but one method involves reacting M with briquettes at a high temperature of 1500 to 1600°C.
There is also a method of melting and separating Ca-AJ gold alloy slag,
Because it is at high temperature and in the atmosphere, M and Ca evaporation, oxidation,
The nitriding loss was large, making it difficult to put it into practical use on an industrial scale.
これに対し本発明の方法におけるＣａＯのＭによる還元
反応では合金相とフラックス（スラグ）相とを分離する
必要がなく、シかも生成するＣａ−Ｕの量は精錬剤とし
て有効な含有量とすればよいので、還元反応も比較的低
温で容易に進行させることができる。そして溶鋼中に介
在しているＡＪ２０ｓ等の捕捉能の大きいフラックスの
組成、即ちｌ ２ｃａｏ ＠ ７１’Ｊ＊ＯｓとＣａＯ
ノ混合組成ノフラツクスをＣａ−）Ｊ合金と併せて一挙
に得ることができるのは本発明の製造法の大きな利点で
ある。On the other hand, in the reduction reaction of CaO with M in the method of the present invention, there is no need to separate the alloy phase and the flux (slag) phase, and the amount of Ca-U produced is an effective content as a refining agent. Therefore, the reduction reaction can be easily carried out at a relatively low temperature. And the composition of the flux with high trapping ability, such as AJ20s, which is present in the molten steel, that is, l 2cao @ 71'J*Os and CaO.
It is a great advantage of the manufacturing method of the present invention that a mixed composition noflux can be obtained at once together with a Ca-)J alloy.
実施例
原料として１１１１Ｉ＋以下に粉砕したＣａ０９７．５
％を含有する生石灰６７０部、Ａ１９０％を含有する
Ｍ合金のダライ粉３３０部を十分に混合しアーモンド状
ブリケットに成型した。このブリケットを密閉可能な内
熱式横形台車炉に装入しＡｒｌ気圧に置換の後１１００
℃迄昇温し３Ｈｒ保持し焼成した。炉冷後、炉より排出
したブリケットを化学分析にて態別定量を試みた結果、
重量でＣａ １６．７ ％ 、ＡＡ！ ２２．５ｑ６
ＣａＯ３７，０％、Ａｌ２Ｏ３２１，５％から成ってい
た。Ｘ線回折によればＣａＡ＆、ＣａＯ１１２ＣａＯ・
７ＡＪ２０ｇの明確なピークが認められた。メタル相の
Ｃａ含有量は４０％程度と推定される。更にこのブリケ
ットをインジェクションで用いる６０メツシュ全通迄微
粉砕した後、採取した粉末単一粒子を顕微鏡、Ｘ線マイ
クロアナライザーで調査した結果全てメタル相とフラッ
クス相が混合した組織が認められた。Ca097.5 ground to 1111I+ or less as an example raw material
670 parts of quicklime containing 190% A and 330 parts of M alloy powder containing 190% A were thoroughly mixed and molded into almond-shaped briquettes. The briquettes were charged into a sealable internal heating type horizontal bogie furnace, and after being replaced with Arl pressure, the temperature was 1100.
The temperature was raised to ℃ and maintained for 3 hours for firing. After the furnace was cooled, we attempted to quantify the briquettes discharged from the furnace by chemical analysis.
Ca 16.7% by weight, AA! 22.5q6
It consisted of 7.0% CaO and 21.5% Al2O3. According to X-ray diffraction, CaA&, CaO112CaO・
A clear peak of 7AJ20g was observed. The Ca content of the metal phase is estimated to be about 40%. Furthermore, after this briquette was pulverized to 60 meshes for use in injection, the sampled powder single particles were examined using a microscope and an X-ray microanalyzer, and as a result, a mixed structure of a metal phase and a flux phase was observed in all of the briquettes.
次にこの微粉末粒子を溶鋼の精錬剤に使用した結果を示
す。Next, we will show the results of using this fine powder particle as a refining agent for molten steel.
高周波誘導炉（電融マグネシャライニング）中で、３０
に９０ｋｌ −８ｉキルド鋼を溶製し、アルゴン雰囲気
下にて前記精錬剤及び比較例として表１に示す精錬剤を
溶鋼重量に対しＯ，ＳＳ添加し、１５分後に溶鋼を金型
に鋳造した。In a high frequency induction furnace (electrofused magnesia lining), 30
90kl -8i killed steel was melted, and the refining agent and the refining agent shown in Table 1 as a comparative example were added to the weight of the molten steel in O and SS in an argon atmosphere, and after 15 minutes, the molten steel was cast into a mold. .
鋳塊よりサンプυ・ングし、Ｓ含有量の分析及び介在物
の解析をした。得られた結果を表１に示す。The ingot was sampled and the S content and inclusions were analyzed. The results obtained are shown in Table 1.
なお精錬剤の添加情況の観察で、本発明のものは添加後
ヒユームの突発的な発生が見られずＣａの急激な蒸発が
抑えられていることが認められた。In addition, by observing the addition of the refining agent, it was found that in the case of the present invention, no sudden generation of hume was observed after the addition of the refining agent, and rapid evaporation of Ca was suppressed.
表中、本発明のものと比較例はＣａ−Ａｌの組成、Ｃａ
−８ｉ 、ＣａＯ１Ａ４０ｓの含有量については同一
とした。また表中Ｏ印は微細なカルシウムアルミネート
系介在物又は微細な球状のＣａＯ−ＡＪ２０ｓ −Ｃａ
Ｓ系介在物が認められたことを示し、Ｘ印はこれらの介
在物が認められずＡ４２０ｓクラスターとＭｎＳが存在
していることを示す。In the table, the composition of the present invention and the comparative example are Ca-Al composition, Ca
-8i and the content of CaO1A40s were the same. In addition, O in the table indicates fine calcium aluminate inclusions or fine spherical CaO-AJ20s-Ca
This indicates that S-based inclusions were observed, and the X mark indicates that these inclusions were not observed and A420s clusters and MnS were present.
手続補正書（自発）
昭和５７年９月ｌｋ日
特許庁長官 若杉 和装置
１、事件の表示
昭和５７年特許顧第１９６９７号
２、発明の名称
金属精錦剤
３、補正をする者
事件との関係 特許用−人
住所 東京ＩＩＩ区芝大門−丁目１３書９号名称 １０
０） 昭和電工株式会社
代表者 洋本 泰延
番１代理人
居所 東京都港区芝大門−丁目１３番９号昭和電工株式
会社内
〒１０５ 置 ０３−４３２−５１１１ （代表）６
、補正の内容
本■哨編書のＶ！電を以下のとおり補正します。Procedural amendment (spontaneous) September 1980, Director General of the Patent Office Kazuki Wakasugi 1, Indication of the case 1982 Patent Review No. 19697 2, Name of the invention Metal fine brocade agent 3, Person making the amendment Related Patent-Person Address Tokyo III-ku Shiba Daimon-Chome 13-sho No. 9 Name 10
0) Showa Denko Co., Ltd. Representative: Yomoto Yasunobu No. 1 Agent Address: Showa Denko Co., Ltd., 13-9 Shiba Daimon-chome, Minato-ku, Tokyo 105 03-432-5111 (Representative) 6
, Correction contents book ■ Sho-edited book V! Correct the voltage as follows.
（１）餡７１［１５行、ｒｌｌｊを「い」と補正する。(1) Bean paste 71 [line 15, correct rllj to "ii".
（２）第７１１１９行、ｒｌＪを「−」と補正する。(2) Line 71119, correct rlJ to "-".
（３）第１１１［１行、ｒｌｌｌＪを「一部Ｊと補正す
る。(3) Line 111 [1st line, rllllJ is corrected as “partly J”.
（４）第１３１［善行〜５行にかけてｒＣａ−ＡＩの量
」とあるのをｒｃａ−Ａｌ含金の量」と補正する。(4) No. 131 [Amount of rCa-AI in lines 131 to 5] is corrected to "amount of rCa-Al metal content."
（５）Ｉｔｓ頁表１の下２行目にあるｒｃａ−５１ｊを
削除する。(5) Delete RCA-51j in the second row at the bottom of Table 1 on its page.
−（−(
Claims (1)
成分とし、これらが一体に結合してなる金属精錬剤（２
） Ｃａ−４７合金２０〜５０１、ＣａＯ＋Ａ＆ ０
ａ８０〜５０ｔｓ％ＣａＦｓＯ〜３０ｑｂからなる特許
請求の範囲第１項記載の金属精錬剤(1) A metal refining agent (2
) Ca-47 alloy 20~501, CaO+A&0
The metal refining agent according to claim 1, consisting of a80-50ts% CaFsO-30qb
Priority Applications (7)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP1969782A JPS58141320A (en) | 1982-02-12 | 1982-02-12 | Metal refining agent |
| GB08303495A GB2118209B (en) | 1982-02-12 | 1983-02-08 | Refining agent of molten metal and methods for producing the same |
| FR8302447A FR2521593B1 (en) | 1982-02-12 | 1983-02-10 | MOLTEN METAL REFINING AGENT AND PROCESS FOR PRODUCING THE AGENT |
| SE8300707A SE459339B (en) | 1982-02-12 | 1983-02-10 | REFINING MATERIAL FOR METAL AND PROCEDURES FOR ITS PREPARATION |
| CA000421358A CA1204596A (en) | 1982-02-12 | 1983-02-10 | Refining agent of molten metal and methods for producing the same |
| DE19833304762 DE3304762A1 (en) | 1982-02-12 | 1983-02-11 | FINISHING AGENT FOR METALS AND METHOD FOR THE PRODUCTION THEREOF |
| US06/466,188 US4435210A (en) | 1982-02-12 | 1983-02-14 | Refining agent of molten metal and methods for producing the same |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP1969782A JPS58141320A (en) | 1982-02-12 | 1982-02-12 | Metal refining agent |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| JPS58141320A true JPS58141320A (en) | 1983-08-22 |
| JPH0125368B2 JPH0125368B2 (en) | 1989-05-17 |
Family
ID=12006449
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP1969782A Granted JPS58141320A (en) | 1982-02-12 | 1982-02-12 | Metal refining agent |
Country Status (1)
| Country | Link |
|---|---|
| JP (1) | JPS58141320A (en) |
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPS6475622A (en) * | 1987-09-17 | 1989-03-22 | Sumitomo Metal Ind | Desulfurizing method in molten steel |
| JPH0347910A (en) * | 1989-07-14 | 1991-02-28 | Nippon Steel Corp | Method for deoxidizing molten steel |
| KR100368726B1 (en) * | 1998-12-29 | 2003-05-09 | 주식회사 포스코 | Molten steel desulfurization agent for powder blowing of aluminum deoxidized steel |
Citations (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPS5719696A (en) * | 1980-07-09 | 1982-02-01 | Tokyo Shibaura Electric Co | Lining plate for concrete structure containment vessel |
-
1982
- 1982-02-12 JP JP1969782A patent/JPS58141320A/en active Granted
Patent Citations (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPS5719696A (en) * | 1980-07-09 | 1982-02-01 | Tokyo Shibaura Electric Co | Lining plate for concrete structure containment vessel |
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPS6475622A (en) * | 1987-09-17 | 1989-03-22 | Sumitomo Metal Ind | Desulfurizing method in molten steel |
| JPH0347910A (en) * | 1989-07-14 | 1991-02-28 | Nippon Steel Corp | Method for deoxidizing molten steel |
| KR100368726B1 (en) * | 1998-12-29 | 2003-05-09 | 주식회사 포스코 | Molten steel desulfurization agent for powder blowing of aluminum deoxidized steel |
Also Published As
| Publication number | Publication date |
|---|---|
| JPH0125368B2 (en) | 1989-05-17 |
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