JP2561615B2 - Method for producing complex slag refiner for refining used in out-of-furnace refining - Google Patents
Method for producing complex slag refiner for refining used in out-of-furnace refiningInfo
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- JP2561615B2 JP2561615B2 JP5269989A JP26998993A JP2561615B2 JP 2561615 B2 JP2561615 B2 JP 2561615B2 JP 5269989 A JP5269989 A JP 5269989A JP 26998993 A JP26998993 A JP 26998993A JP 2561615 B2 JP2561615 B2 JP 2561615B2
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Description
【０００１】[0001]
【産業上の利用分野】この発明は、溶鋼の炉外精錬に際
して溶鋼に添加する脱硫剤、脱酸剤および造滓剤の性質
を兼ね備えた炉外精錬で用いる精錬用複合造滓剤の製造
方法に関する。BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a method for producing a complex smelting agent for refining used in the out-of-pile refining having the properties of a desulfurizing agent, a deoxidizing agent and a smelting agent to be added to molten steel during refining of molten steel outside the furnace. Regarding
【０００２】[0002]
【従来の技術】炉外精錬で溶鋼に添加する材料について
は、従来は、生石灰、フラックス及び脱酸剤であり、そ
れらの使用方法は単味あるいは混合して使用されてい
た。また、最近では、これらを混合したあと造粒成型し
た精錬剤も存在するが、造粒物の強度が弱く、経時変化
により崩壊が早いという欠点を有した。2. Description of the Related Art Conventionally, the materials added to molten steel in the refining outside the furnace are quick lime, flux and deoxidizing agent, and their usage is simple or mixed. Further, recently, there are refining agents obtained by mixing and granulating these, but they have a drawback that the strength of the granulated product is weak and the disintegration is rapid due to aging.
【０００３】また、溶鋼中への添加後、溶融速度が遅く
溶鋼の熱ロスが大きいため滓化に劣るという不都合を有
した。Further, after the addition to the molten steel, there is a disadvantage that the melting rate is slow and the heat loss of the molten steel is large, resulting in poor slag formation.
【０００４】[0004]
【発明が解決しようとする課題】本発明では、溶鋼への
投入までのハンドリング中に崩壊を起こさない十分な強
度を有する造粒成型物であって且つ溶鋼中へ添加後すみ
やかに溶融滓化し、溶鋼の熱ロスを最小限にする炉外精
錬用複合造滓剤の製造方法の提供することを目的として
いる。DISCLOSURE OF THE INVENTION In the present invention, a granulated molded product having sufficient strength that does not cause collapse during handling until being charged into molten steel, and immediately after being added into molten steel, is molten and slagged, It is an object of the present invention to provide a method for producing a composite slag forming agent for out-of-pile refining that minimizes heat loss of molten steel.
【０００５】[0005]
【課題を解決するための手段】前記課題を達成するため
に、この発明に係る炉外精錬で用いる精錬用複合造滓剤
の製造方法においては、生石灰が５０重量％未満、蛍石
が７〜１５重量％、炭化珪素５〜２０重量％、軽焼マグ
ネシア５〜１０重量％、アルミ灰３〜１０重量％で且つ
（２ＣａＯ・ＳｉＯ２），（２ＣａＯ・ＭｇＯ，２Ｓｉ
Ｏ２），（２ＣａＯ・Ａｌ２Ｏ３・２ＳｉＯ２）を主成
分とする合成物（以下「合成物」と記す）を５０重量％
以下含有する各々の粉粒物を使用し均一に混合したあと
加圧成型しあるいはバインダーを用いて造粒成型するも
のである。In order to achieve the above object, in the method for producing a complex smelting agent for refining used in the out-of-pile refining according to the present invention, quick lime is less than 50% by weight and fluorite is 7 to 7%. 15 wt% silicon carbide 5-20% by weight, light burned magnesia 5-10 wt%, and 3-10 wt% aluminum ash (2CaO · SiO 2), ( 2CaO · MgO, 2Si
O 2 ), 50% by weight of a compound containing (2CaO · Al 2 O 3 · 2SiO 2 ) as a main component (hereinafter referred to as “composite”)
Each of the powders and granules contained below is uniformly mixed and then pressure-molded or granulated using a binder.
【０００６】また、この発明に係る炉外精錬で用いる精
錬用複合造滓剤の製造方法においては、生石灰が５０重
量％未満、蛍石が７〜１５重量％、炭化珪素５〜２０重
量％、軽焼マグネシア５〜１０重量％、アルミ灰３〜１
０重量％で且つ合成物を５０重量％以下で更に針状アル
ミニウムを５重量％以下の量を加えた各々の粉粒物を使
用し均一に混合したあと加圧成型しあるいはバインダー
を用いて造粒成型するものである。Further, in the method for producing a complex slag for refining used in the out-furnace refining according to the present invention, quick lime is less than 50% by weight, fluorite is 7 to 15% by weight, silicon carbide is 5 to 20% by weight, light burned magnesia 5-10 wt%, aluminum ash 3 to 1
0% by weight, 50% by weight or less of synthetic material, and 5% by weight or less of acicular aluminum were used to uniformly mix and then press-mold or prepare with a binder. It is what is formed into grains.
【０００７】また、前記生石灰の表面を、ＳｉＯ２を主
成分とする微粉末で事前に覆うこともできる。Further, the surface of the quicklime may be covered with a fine powder containing SiO 2 as a main component in advance.
【０００８】[0008]
【作用】この発明に係る炉外精錬で用いる精錬用複合造
滓剤の製造方法は上記のように構成されているため、溶
鋼に添加された場合、ＣａＯとＳｉＯ２が吸熱反応によ
って主として２ＣａＯ・ＳｉＯ２となって溶鋼上の滓と
なるが、事前に溶融させた（２ＣａＯ・ＳｉＯ２），
（２ＣａＯ・ＭｇＯ，２ＳｉＯ２），（２ＣａＯ・Ａｌ
２Ｏ３・２ＳｉＯ２）を配合しているため、溶鋼におけ
る温度ロスを最小限におさえ速やかに滓化を促す。Since the method for producing the complex smelting agent for refining used in the out-furnace refining according to the present invention is configured as described above, when added to molten steel, CaO and SiO 2 are mainly 2CaO. It becomes SiO 2 and becomes a slag on the molten steel, but it was melted in advance (2CaO · SiO 2 ),
(2CaO ・ MgO, 2SiO 2 ), (2CaO ・ Al
Since 2 O 3 · 2SiO 2 ) is blended, temperature loss in molten steel is minimized and slagging is promptly promoted.
【０００９】また、成形強度保持材として針状アルミニ
ウムを混合させれぼ、成形強度及び成形維持能力を向上
させることはができるとともにアルミニウムの急激な酸
化反応によって、溶鋼における昇温及び脱硫を促進させ
ることもできる。Further, it is possible to improve the molding strength and the ability to maintain the molding by mixing acicular aluminum as a material for maintaining the molding strength, and to accelerate the temperature rise and desulfurization in molten steel by the rapid oxidation reaction of aluminum. You can also
【００１０】また、前記生石灰の表面を、ＳｉＯ２を主
成分とする微粉末を事前に混合し覆うようにすれば、か
かる生石灰の自然放置状態での吸水性を遅鈍させ吸湿か
らの造粒物の崩壊性を極力おさえることができ、この結
果、加圧成型品の崩壊の要因となる大気中からの吸水に
よる体積膨張による崩壊を防ぐことができる。Further, if the surface of the quicklime is mixed and covered in advance with a fine powder containing SiO 2 as a main component, the water absorption of the quicklime in a natural standing state is delayed to granulate from moisture absorption. It is possible to suppress the disintegration property of the product as much as possible, and as a result, it is possible to prevent the disintegration of the pressure-molded product due to volume expansion due to water absorption from the atmosphere.
【００１１】[0011]
【実施例】炉外精錬で用いる精錬用複合造滓剤の製造方
法の具体的一実施例を説明し、その効果を説明する。EXAMPLE A concrete example of a method for producing a refining composite slag for use in the out-of-furnace refining will be explained, and its effect will be explained.
【００１２】 （１）．精錬用複合造滓剤の配合成分（配合例１） 原料名 配合比（重量％） 合成物 ２２ 針状アルミニウム ３ 生石灰 ４０ 蛍石 １０ 炭化珪素 １０ 軽焼マグネシア ８ アルミ灰 ７(1). Compounding ingredients of compounding smelting agent for refining (Compounding example 1) Raw material name Mixing ratio (wt%) Synthetic material 22 Needle-shaped aluminum 3 Quick lime 40 Fluorite 10 Silicon carbide 10 Light burned magnesia 8 Aluminum ash 7
【００１３】（２）．なお、上記配合は、合成物は１５
〜３０重量％、針状アルミニウムは１〜５重量％、生石
灰は３８〜４５重量％、蛍石は７〜１５重量％、炭化珪
素は５〜２０重量％、軽焼マグネシアは５〜１０重量
％、アルミ灰は３〜１０重量％であればよい。(2). In addition, the above composition is 15 for the synthetic product.
-30% by weight, acicular aluminum 1-5% by weight, quicklime 38-45% by weight, fluorspar 7-15% by weight, silicon carbide 5-20% by weight, light burned magnesia 5-10% by weight. The aluminum ash may be 3 to 10% by weight.
【００１４】（３）．「合成物」は溶融時、事前に溶融
させた（２ＣａＯ・ＳｉＯ２），（２ＣａＯ・ＭｇＯ，
２ＳｉＯ２），（２ＣａＯ・Ａｌ２Ｏ３・２ＳｉＯ２）
を配合しているため、溶鋼における温度ロスを最小限に
押さえ速やかに滓化を促すために配合されるものであ
り、その具体的配合例として前記（１）記載の精錬用複
合造滓剤（配合例１）が挙げられる。なお、かかる合成
物の配合割合を５０重量％以下に限定したのは脱酸、脱
硫性に対する造滓の効果のバランスを考慮した配合比と
したためである。(3). "Composite" was melted during the melt, in advance (2CaO · SiO 2), ( 2CaO · MgO,
2SiO 2 ), (2CaO ・ Al 2 O 3・ 2SiO 2 )
Is added in order to minimize the temperature loss in molten steel and promptly promote slag formation. As a concrete example of the mixture, the complex smelting agent for refining described in (1) above ( Formulation example 1) is mentioned. The compounding ratio of the compound is limited to 50% by weight or less because the compounding ratio is set in consideration of the balance of the effect of slag on deoxidizing and desulfurizing properties.
【００１５】「針状アルミニウム」は、成形物の強度増
強及び維持のため、並びに、脱酸および昇熱の効果を発
揮させるために配合されるものである。The "acicular aluminum" is blended to enhance and maintain the strength of the molded product and to exert the effects of deoxidation and heating.
【００１６】「生石灰」は、脱硫および塩基度調整のた
めに配合されるものである。なお、この生石灰の表面
を、ＳｉＯ２を主成分とする微粉末（ＳｉＯ２ ７０重
量％，Ａｌ２Ｏ３ ３０重量％）を事前に混合し覆うこ
とにすれば、かかる生石灰の自然放置状態での吸水性を
下げることができ、この結果、加圧成型品の崩壊の要因
となる大気中からの吸水による体積膨張による崩壊を防
ぐことができる。"Quick lime" is added for desulfurization and basicity adjustment. In addition, if the surface of this quicklime is mixed with a fine powder containing SiO 2 as a main component (70% by weight of SiO 2, 30% by weight of Al 2 O 3 ) in advance to cover it, the quicklime is left in a natural state. It is possible to reduce the water absorption of the product, and as a result, it is possible to prevent the collapse of the pressure-molded product due to volume expansion due to water absorption from the atmosphere.
【００１７】蛍石、炭化珪素、軽焼マグネシア、アルミ
灰を配合してあるが、これらは、脱酸効果、脱硫効果、
反応促進効果、炉材保護効果を持たせ、かつ配合比に付
いてはアルミ灰は白煙等の環境面、蛍石は耐火物の損傷
面等を考慮した配合比とした。Fluorite, silicon carbide, light burned magnesia, and aluminum ash are blended, and these have a deoxidizing effect, a desulfurizing effect,
The reaction accelerating effect and the furnace material protecting effect are provided, and the compounding ratio is such that aluminum ash has an environmental aspect such as white smoke and fluorspar has a damage factor to the refractory.
【００１８】（４）．「針状アルミニウム」を配合した
場合の加圧成型テストの結果は次のようである。このテ
ストに使用した精錬用複合造滓剤は二種類（Ａ，Ｂ）
で、そのうちのＡ（針状アルミ１重量％、生石灰４０量
％）、Ｂ（針状アルミ５重量％、生石灰４０量％）と
し、これら以外の配合物は前記配合例１に基づき同比率
で増減させたものである。(4). The results of the pressure molding test when "acicular aluminum" was blended are as follows. There are two types of smelting complex slag agents used in this test (A, B)
Among them, A (1% by weight of needle-shaped aluminum and 40% by weight of quick lime) and B (5% by weight of needle-shaped aluminum and 40% by weight of quick lime) were used. It has been increased or decreased.
【００１９】・テスト方法前記精錬用複合造滓剤Ａおよ
び前記精錬用複合造滓剤Ｂと、針状アルミを配合しない
ものとの比較を行う。使用した試験機械はブリケットマ
シンＢＣＳ−２５（新東）で、ロール圧力は２０ｔｏｎ
／ｃｍ２である。Test Method A comparison is made between the refining composite slag preparation A and the refining composite slag preparation B, and those not containing needle-shaped aluminum. The test machine used was a briquette machine BCS-25 (Shinto) with a roll pressure of 20 tons.
/ Cm 2 .
【００２０】・テスト結果 ・ Test results
【００２１】 ・このように「針状アルミニウム」を配合すると、成形
物の強度を増強できるとともに成形維持能力を向上させ
ることができる。[0021] -By thus blending "acicular aluminum", the strength of the molded product can be increased and the molding maintaining ability can be improved.
【００２２】（５）．前記配合例１における生石灰の代
わりに、ＳｉＯ２を主成分とする微粉末を事前に混合し
覆うことにした場合の、吸水質量変化試験の結果は下記
の表のとおりである。(5). The following table shows the results of the water absorption mass change test in the case where fine powder containing SiO 2 as a main component was previously mixed and covered instead of the quicklime in Formulation Example 1.
【００２３】 [0023]
【００２４】[0024]
【発明の効果】この発明に係る炉外精錬で用いる精錬用
複合造滓剤の製造方法は上記のように構成されているた
め、溶鋼に添加された場合、ＣａＯとＳｉＯ２が吸熱反
応によって２ＣａＯ・ＳｉＯ２となって溶鋼上の滓とな
るが、事前に溶融させた（２ＣａＯ・ＳｉＯ２），（２
ＣａＯ・ＭｇＯ，２ＳｉＯ２），（２ＣａＯ・Ａ１２Ｏ
３・２ＳｉＯ２）を配合しているため、鋼の高級化、多
品種化、コスト低減化に基づく精錬技術の進歩及び精錬
時間の短縮化に伴い滓化の早い複合添加物が必要となっ
た現在において、滓化反応が速やかに起こりその要望を
満たすものである。EFFECTS OF THE INVENTION Since the method for producing a smelting composite smelting agent used in the out-of-furnace smelting according to the present invention is constructed as described above, when CaO and SiO 2 are added to molten steel, 2CaO and 2CaO are produced by an endothermic reaction. · SiO 2 and becomes a slag on the molten steel is, pre-melted (2CaO · SiO 2), ( 2
CaO · MgO, 2SiO 2 ), (2CaO · A1 2 O
(3・ 2SiO 2 ) is compounded, so advanced refinement of steel, multi-product type, progress of refining technology based on cost reduction, and shortening of refining time required complex additives with rapid slag formation. At present, the slagging reaction rapidly occurs to satisfy the demand.
【００２５】また、成形強度保持材として針状アルミニ
ウムを混合させれば、アルミニウムの急激な酸化反応に
よって、溶鋼の昇温効果及び脱流効果を向上させること
ができる。If needle-shaped aluminum is mixed as a material for maintaining the forming strength, the temperature rising effect and the deflow effect of molten steel can be improved by the rapid oxidation reaction of aluminum.
【００２６】さらに、粉塵等作業環境上からも粉塵の発
生を無くすため、成型品としているが、成型品の崩壊の
要因となる生石灰をＳｉＯ２の微粉末を事前に混合し覆
うことにより経時変化に強い成型品となる。Further, in order to prevent the generation of dust from the working environment such as dust, the molded product is used. However, quick lime that causes the collapse of the molded product is preliminarily mixed with a fine powder of SiO 2 and covered to change with time. It becomes a strong molded product.
───────────────────────────────────────────────────── フロントページの続き (72)発明者 松浦 博幸 静岡県浜松市西丘町71−５ 株式会社シ ンコーフレックス内 (72)発明者 高塚 保博 静岡県浜松市西丘町71−５ 株式会社シ ンコーフレックス内 (72)発明者 松波 勝 岐阜県大垣市赤坂町2093 河合石灰工業 株式会社内 (72)発明者 菊池 一彦 岐阜県大垣市赤坂町2093 河合石灰工業 株式会社内 (72)発明者 桐山 栄 岐阜県大垣市赤坂町2093 河合石灰工業 株式会社内 (72)発明者 内山 英男 東京都千代田区四番町５番地９ トピー 実業株式会社内 ─────────────────────────────────────────────────── ─── Continuation of the front page (72) Inventor Hiroyuki Matsuura 71-5 Nishioka-cho, Hamamatsu City, Shizuoka Prefecture Shinko Flex Co., Ltd. (72) Inventor Yasuhiro Takatsuka 71-5 Nishioka-cho, Hamamatsu City, Shizuoka Prefecture Shinko Flex Co., Ltd. (72) Inventor Matsunami Masaru 2093 Akasaka-cho, Ogaki-shi, Gifu Prefecture Kawai Lime Industry Co., Ltd. (72) Inventor Kazuhiko Kikuchi 2093 Akasaka-cho, Ogaki-shi, Gifu Prefecture Kawai Lime Industry Co., Ltd. (72) Inventor Kiriyama Sakae Gifu Prefecture 2093 Akasaka-cho, Ogaki-shi Kawai Lime Industry Co., Ltd. (72) Inventor Hideo Uchiyama 5-5, Yonbancho, Chiyoda-ku, Tokyo Topy Industry Co., Ltd.
Claims (3)
５重量％、炭化珪素５〜２０重量％、軽焼マグネシア５
〜１０重量％、アルミ灰３〜１０重量％で且つ（２Ｃａ
Ｏ・ＳｉＯ ２ ），（２ＣａＯ・ＭｇＯ，２ＳｉＯ２），
（２ＣａＯ・Ａｌ２Ｏ３・２ＳｉＯ２）を主成分とする
合成物（以下「合成物」と記す）を５０重量％以下含有
する各々の粉粒物を使用し均一に混合したあと加圧成型
しあるいはバインダーを用いて造粒成型することを特徴
とす る炉外精錬で用いる精錬用複合造滓剤の製造方法。1. Quick lime is less than 50% by weight and fluorite is 7-1.
5% by weight, 5 to 20% by weight of silicon carbide, lightly burned magnesia 5
-10 wt%, aluminum ash 3-10 wt% and (2Ca
O · SiO 2), (2CaO · MgO, 2SiO 2),
(2CaO · Al 2 O 3 · 2SiO 2 ) as a main component A synthetic material (hereinafter referred to as “synthetic material”) containing 50% by weight or less of each powder and granules is uniformly mixed and then pressure-molded. Characterized by granulation molding using sushi or binder
Method for producing a refining complex slag agent used in to that outside the furnace refining and.
５重量％、炭化珪素５〜２０重量％、軽焼マグネシア５
〜１０重量％、アルミ灰３〜１０重量％で且つ合成物を
５０重量％以下で更に針状アルミニウムを５重量％以下
の量を加えた各々の粉粒物を使用し均一に混合したあと
加圧成型しあるいはバインダーを用いて造粒成型したこ
とを特徴とする炉外精錬で用いる精錬用複合造滓剤の製
造方法。2. Quick lime is less than 50% by weight and fluorite is 7-1.
5% by weight, 5 to 20% by weight of silicon carbide, lightly burned magnesia 5
10 wt%, 3-10 wt% aluminum ash, 50 wt% or less of synthetic material, and 5 wt% or less of acicular aluminum are used to uniformly mix and then add. Manufacture of a smelting composite slag agent for use in out-of-furnace refining characterized by being pressure molded or granulated using a binder
Build method .
とする微粉末で事前に覆うことを特徴とする請求項１又
は請求項２の炉外精錬で用いる精錬 用複合造滓剤の製造
方法。3. The surface of the quicklime is previously covered with a fine powder containing SiO 2 as a main component.
Is the production of a complex refining agent for refining used in the out-of-furnace refining of claim 2.
Way .
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP5269989A JP2561615B2 (en) | 1993-09-30 | 1993-09-30 | Method for producing complex slag refiner for refining used in out-of-furnace refining |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP5269989A JP2561615B2 (en) | 1993-09-30 | 1993-09-30 | Method for producing complex slag refiner for refining used in out-of-furnace refining |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| JPH07102310A JPH07102310A (en) | 1995-04-18 |
| JP2561615B2 true JP2561615B2 (en) | 1996-12-11 |
Family
ID=17480020
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP5269989A Expired - Lifetime JP2561615B2 (en) | 1993-09-30 | 1993-09-30 | Method for producing complex slag refiner for refining used in out-of-furnace refining |
Country Status (1)
| Country | Link |
|---|---|
| JP (1) | JP2561615B2 (en) |
Families Citing this family (8)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| GB9903051D0 (en) * | 1999-02-11 | 1999-03-31 | Qual Chem Limited | Steelmaking |
| KR100868437B1 (en) * | 2001-11-21 | 2008-11-11 | 주식회사 포스코 | Fluorite for flux |
| CN100450972C (en) * | 2006-04-27 | 2009-01-14 | 武汉科技大学 | Fused magnesia-aluminum spinel composite fire-resistant material and producing method thereof |
| KR100925152B1 (en) * | 2008-03-24 | 2009-11-05 | 주식회사 알덱스 | Activator for slag of ladle in steel refining process |
| JP6046537B2 (en) | 2013-03-29 | 2016-12-14 | 富士フイルム株式会社 | Method and apparatus for producing composite for acid gas separation |
| JP6071004B2 (en) | 2013-03-29 | 2017-02-01 | 富士フイルム株式会社 | Method for producing acid gas separation composite membrane and acid gas separation membrane module |
| JP6161124B2 (en) | 2013-03-29 | 2017-07-12 | 富士フイルム株式会社 | Method for producing acid gas separation composite membrane and acid gas separation membrane module |
| JP6742555B2 (en) | 2018-08-31 | 2020-08-19 | 住友化学株式会社 | Separation membrane sheet, separation membrane element, separation membrane module, and method for manufacturing separation membrane sheet |
Citations (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPS60258406A (en) * | 1984-06-06 | 1985-12-20 | Nippon Steel Corp | Synthetic flux for molten steel |
| JPH0341523A (en) * | 1989-07-10 | 1991-02-22 | Nippon Telegr & Teleph Corp <Ntt> | Parallel process ordering system |
| JPH0364566A (en) * | 1989-08-01 | 1991-03-19 | A Monforts Gmbh & Co | Method and apparatus for dying fiber texture strip |
-
1993
- 1993-09-30 JP JP5269989A patent/JP2561615B2/en not_active Expired - Lifetime
Patent Citations (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPS60258406A (en) * | 1984-06-06 | 1985-12-20 | Nippon Steel Corp | Synthetic flux for molten steel |
| JPH0341523A (en) * | 1989-07-10 | 1991-02-22 | Nippon Telegr & Teleph Corp <Ntt> | Parallel process ordering system |
| JPH0364566A (en) * | 1989-08-01 | 1991-03-19 | A Monforts Gmbh & Co | Method and apparatus for dying fiber texture strip |
Also Published As
| Publication number | Publication date |
|---|---|
| JPH07102310A (en) | 1995-04-18 |
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