JP2008502481A - Zirconia refractories for steelmaking - Google Patents

Zirconia refractories for steelmaking Download PDF

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JP2008502481A
JP2008502481A JP2007515740A JP2007515740A JP2008502481A JP 2008502481 A JP2008502481 A JP 2008502481A JP 2007515740 A JP2007515740 A JP 2007515740A JP 2007515740 A JP2007515740 A JP 2007515740A JP 2008502481 A JP2008502481 A JP 2008502481A
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カールソン グラハム
ヌーニング ロバート
ソシンスキ デヴィッド
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ニューコア・コーポレーション
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    • C—CHEMISTRY; METALLURGY
    • C04—CEMENTS; CONCRETE; ARTIFICIAL STONE; CERAMICS; REFRACTORIES
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    • C04B35/48—Shaped ceramic products characterised by their composition; Ceramics compositions; Processing powders of inorganic compounds preparatory to the manufacturing of ceramic products based on oxide ceramics based on zirconium or hafnium oxides, zirconates, zircon or hafnates
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    • B22—CASTING; POWDER METALLURGY
    • B22D—CASTING OF METALS; CASTING OF OTHER SUBSTANCES BY THE SAME PROCESSES OR DEVICES
    • B22D41/00—Casting melt-holding vessels, e.g. ladles, tundishes, cups or the like
    • B22D41/50—Pouring-nozzles
    • B22D41/52—Manufacturing or repairing thereof
    • B22D41/54—Manufacturing or repairing thereof characterised by the materials used therefor
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B22—CASTING; POWDER METALLURGY
    • B22D—CASTING OF METALS; CASTING OF OTHER SUBSTANCES BY THE SAME PROCESSES OR DEVICES
    • B22D11/00—Continuous casting of metals, i.e. casting in indefinite lengths
    • B22D11/06—Continuous casting of metals, i.e. casting in indefinite lengths into moulds with travelling walls, e.g. with rolls, plates, belts, caterpillars
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B22—CASTING; POWDER METALLURGY
    • B22D—CASTING OF METALS; CASTING OF OTHER SUBSTANCES BY THE SAME PROCESSES OR DEVICES
    • B22D11/00—Continuous casting of metals, i.e. casting in indefinite lengths
    • B22D11/06—Continuous casting of metals, i.e. casting in indefinite lengths into moulds with travelling walls, e.g. with rolls, plates, belts, caterpillars
    • B22D11/0622—Continuous casting of metals, i.e. casting in indefinite lengths into moulds with travelling walls, e.g. with rolls, plates, belts, caterpillars formed by two casting wheels
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B22—CASTING; POWDER METALLURGY
    • B22D—CASTING OF METALS; CASTING OF OTHER SUBSTANCES BY THE SAME PROCESSES OR DEVICES
    • B22D11/00—Continuous casting of metals, i.e. casting in indefinite lengths
    • B22D11/06—Continuous casting of metals, i.e. casting in indefinite lengths into moulds with travelling walls, e.g. with rolls, plates, belts, caterpillars
    • B22D11/0637—Accessories therefor
    • B22D11/064—Accessories therefor for supplying molten metal
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B22—CASTING; POWDER METALLURGY
    • B22D—CASTING OF METALS; CASTING OF OTHER SUBSTANCES BY THE SAME PROCESSES OR DEVICES
    • B22D11/00—Continuous casting of metals, i.e. casting in indefinite lengths
    • B22D11/10—Supplying or treating molten metal
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B22—CASTING; POWDER METALLURGY
    • B22D—CASTING OF METALS; CASTING OF OTHER SUBSTANCES BY THE SAME PROCESSES OR DEVICES
    • B22D41/00—Casting melt-holding vessels, e.g. ladles, tundishes, cups or the like
    • B22D41/02—Linings

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  • Mechanical Engineering (AREA)
  • Chemical & Material Sciences (AREA)
  • Manufacturing & Machinery (AREA)
  • Ceramic Engineering (AREA)
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  • Materials Engineering (AREA)
  • Organic Chemistry (AREA)
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  • Continuous Casting (AREA)
  • Compositions Of Oxide Ceramics (AREA)
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Abstract

製鋼用の耐火材が、５０〜９５％のジルコニア（ＺｒＯ２）、０〜３５％のシリカ（ＳｉＯ２）、５〜３５％の炭素（Ｃ）、５％未満のアルミナ（Ａｌ２Ｏ３）と、ケイ素（Ｓｉ）金属や炭化物等の酸化防止剤からなる。酸化防止剤の量は、約１０重量％までとすることができる。耐火材には、供給ノズル及び移行部を造る用途がある。又、以下の段階からなる鋼ストリップの連続鋳造方法が開示される。間にロール間隙を有する一対の鋳造ロールを組立て、溶鋼に接触する少なくとも一部が耐火材で構成された、溶鋼を供給して鋳造溜めを形成する金属供給システムを組立て、耐火材の組成を５０〜９５％のジルコニア、０〜３５％のシリカ、５〜３５％の炭素、５％未満のアルミナ、酸化防止剤及び炭化物とし、鋳造ロールを回転させ、ロール間隙を通し下方に送給される薄鋼ストリップを形成する。Refractory material for steelmaking is 50 to 95% zirconia (ZrO 2), 0 to 35% of the silica (SiO 2), 5 to 35 percent of carbon (C), less than 5% alumina (Al 2 O 3) And an antioxidant such as silicon (Si) metal or carbide. The amount of antioxidant can be up to about 10% by weight. Refractory materials have uses to build supply nozzles and transitions. Moreover, the continuous casting method of the steel strip which consists of the following steps is disclosed. A pair of casting rolls having a roll gap between them is assembled, and a metal supply system is formed by supplying molten steel to form a casting sump, at least part of which is made of refractory material in contact with the molten steel, and the composition of the refractory material is 50 -95% zirconia, 0-35% silica, 5-35% carbon, less than 5% alumina, antioxidants and carbides, rotating the casting roll and feeding down through the roll gap Form a steel strip.

Description

本発明は、製鋼に関し、特に連続鋳造による製鋼に関するものである。本発明は、鋼ストリップ鋳造による製鋼に適用される。   The present invention relates to steelmaking, and more particularly to steelmaking by continuous casting. The present invention is applied to steel making by steel strip casting.

薄ストリップ鋼の連続鋳造では、溶鋼が取鍋からタンディッシュと、シュラウド、供給ノズル、場合によっては移行部分をも含む溶鋼供給システムとを介し鋳造機に送給される。これらの金属送給要素は、溶鋼を１５００〜１６００℃又はそれ以上の温度で、溶鋼鋳造プロセスの高温に耐え得る耐火物を介し鋳造機に送給する。これらの耐火物は、溶鋼を供給システムに導入する際の熱衝撃を避けるために供給温度に予熱することもできる。これらの金属供給構成要素は、とりわけ、厚スラブ鋳造機、薄スラブ鋳造機、薄ストリップ鋳造機による連続鋳造で使われる。特に薄ストリップ鋳造で有用な斯かる金属供給構成要素用の耐火材の例が、特許文献１及び特許文献２に開示されている耐火材である。
米国特許第５９２４４７６号明細書 米国特許第６２５７３１５号明細書 In continuous casting of thin strip steel, molten steel is fed from the ladle to the caster via a tundish and a molten steel supply system that also includes a shroud, a supply nozzle, and possibly a transitional portion. These metal feed elements feed the molten steel at a temperature of 1500-1600 ° C. or higher through a refractory that can withstand the high temperatures of the molten steel casting process. These refractories can also be preheated to the supply temperature to avoid thermal shock when introducing molten steel into the supply system. These metal feed components are used, inter alia, in continuous casting with thick slab casters, thin slab casters and thin strip casters. Examples of such refractory materials for metal supply components particularly useful in thin strip casting are the refractory materials disclosed in US Pat.
US Pat. No. 5,924,476 US Pat. No. 6,257,315

薄ストリップ鋳造では、溶鋼は、間にロール間隙を形成し、相互方向に回転する一対の水平配置の鋳造ロール間に導入されるのが標準的である。鋳造ロールは内部冷却されているので、動いているロール上に金属殻が凝固し、それらがロール間隙にて合わされて、ロール間隙から下方に送給される鋳造ストリップを造り出す。「ロール間隙」という用語は本明細書では、鋳造ロールが最も相接近する領域全般を指すのに用いる。溶鋼は取鍋から小容器に注がれ、そこからロール間隙上方に位置した供給ノズル内を流れて、鋳造表面に支えられた鋳造溜めを形成することができる。鋳造溜めは、ロール間隙に隣接し、ロール間隙長さ方向に沿って延びる鋳造ロール上に支持される。鋳造溜めは、通常、鋳造溜め両端から流出しないよう両端を堰止めるため鋳造ロールの端面に摺動係合保持された側部板又は側部堰の間に閉じ込められる。   In thin strip casting, the molten steel is typically introduced between a pair of horizontally arranged casting rolls that form a roll gap therebetween and rotate in opposite directions. Since the casting roll is internally cooled, the metal shells solidify on the moving roll and they are brought together in the roll gap to create a cast strip that is fed downward from the roll gap. The term “roll gap” is used herein to refer to the entire region where the casting rolls are closest. Molten steel can be poured from a ladle into a small container and flow from there through a supply nozzle located above the roll gap to form a casting pool supported by the casting surface. The casting pool is supported on a casting roll adjacent to the roll gap and extending along the roll gap length direction. The casting pool is usually confined between side plates or side weirs that are slidably engaged and held on the end faces of the casting rolls to dam the ends so that they do not flow out of the casting pool ends.

斯かる金属供給システムにおいて問題なのは、溶融したスラグが供給システムの耐火物に付着しがちなことである。このことは、耐火物が溶鋼の温度まで予熱されたとしても起こることが知られていた。溶鋼から耐火物へと蓄積したスラグは壊れやすく、鋳鋼内及び鋳鋼表面上に欠陥を引き起こす。これは、蓄積が薄ストリップ鋳造機の鋳造溜めのメニスカスに起きた場合に特に当てはまる。   A problem with such metal supply systems is that molten slag tends to adhere to the refractory of the supply system. This was known to occur even if the refractory was preheated to the temperature of the molten steel. The slag accumulated from the molten steel to the refractory is fragile and causes defects in the cast steel and on the cast steel surface. This is especially true when accumulation occurs in the casting pool meniscus of the thin strip caster.

我々は、特定の組成の耐火物が、鋼の連続鋳造で金属供給システムの耐火物の上に溶鋼が蓄積するのを抑制することを見出した。斯かる薄ストリップ製鋼の耐火材は、５０〜８５％のジルコニア（ＺｒＯ２）、０〜３５％のシリカ（ＳｉＯ２）、５〜３５％の炭素（Ｃ）、５％未満のアルミナ（Ａｌ２Ｏ３）、及び酸化防止剤からなる（％は全て重量％で記述されている）。使用する炭素の純度は、９９．５％より大とすることができる。耐火材は石灰又は酸化マグネシウムで安定化でき、その量は一般的には約２８％未満でよい。耐火材には、鋼ストリップ連続鋳造による製鋼に用いる供給ノズル及び移行部ノズルブロックを造る際の用途がある。耐火材は、例えば、鋼ストリップ連続鋳造による製鋼に用いる供給ノズルを製造する際に用いることができる。 We have found that a specific composition of refractory suppresses the accumulation of molten steel on the refractory of the metal supply system during continuous casting of steel. Such a thin strip steel refractory material comprises 50-85% zirconia (ZrO 2 ), 0-35% silica (SiO 2 ), 5-35% carbon (C), less than 5% alumina (Al 2 O 3 ), and an antioxidant (all percentages are stated in weight percent). The purity of the carbon used can be greater than 99.5%. The refractory material can be stabilized with lime or magnesium oxide, generally in an amount of less than about 28%. Refractory materials have applications in making feed nozzles and transition nozzle blocks for use in steelmaking by steel strip continuous casting. The refractory material can be used, for example, when manufacturing a supply nozzle used for steel making by continuous casting of steel strip.

又、以下の段階からなる鋼ストリップの連続鋳造方法も開示される。
ａ．間にロール間隙を有し、ロール間隙両端に隣接した閉じ込め閉止部を備えた、一対の冷却された鋳造ロールを組立て、
ｂ．溶鋼に接触する少なくとも一部が耐火材で構成された、鋳造ロール間に溶鋼を供給してロール間に支持された鋳造溜めを形成する金属供給システムを組立て、耐火材の組成を５０〜８５％のジルコニア、０〜３５％のシリカ、５〜３５％の炭素、５％未満のアルミナ、及び酸化防止剤とし、
ｃ．鋳造ロールを相互回転させて鋳造ロール表面に金属殻を形成し、凝固した薄鋼ストリップを鋳造ロール間のロール間隙を通し下方に送給する。 Also disclosed is a method for continuous casting of a steel strip comprising the following steps.
a. Assembling a pair of cooled cast rolls with a roll gap in between and with confinement closures adjacent to both ends of the roll gap;
b. Assemble a metal supply system that forms a casting pool supported between rolls by supplying molten steel between casting rolls, at least part of which is made of refractory material in contact with the molten steel, and the composition of the refractory material is 50 to 85% Zirconia, 0-35% silica, 5-35% carbon, less than 5% alumina, and an antioxidant,
c. The casting rolls are mutually rotated to form a metal shell on the casting roll surface, and the solidified thin steel strip is fed downward through the roll gap between the casting rolls.

耐火材のジルコニア（ＺｒＯ２）含量は６０〜８５重量％とすることができ、より明細には７０〜８０重量％とすることができる。耐火材の炭素含量は８〜３０重量％とすることができ、より明細には１０〜２０重量％とすることができる。ジルコニアは安定化されていてもいなくともよいが、使用時に耐火材上での摩耗を減らすためには石灰又は酸化マグネシウム又はそれらの組合せで安定化させることができる。 The zirconia (ZrO 2 ) content of the refractory material can be 60 to 85% by weight, more specifically 70 to 80% by weight. The carbon content of the refractory material can be 8-30% by weight, more specifically 10-20% by weight. Zirconia may or may not be stabilized, but can be stabilized with lime or magnesium oxide or combinations thereof to reduce wear on the refractory material during use.

酸化防止剤は、耐火材の他の構成要素の酸化を抑制するものであり、耐火材系で酸化を抑制する任意の単一材料若しくは斯かる材料の組合せであってよい。酸化防止剤の量は約１０重量％までとすることができる。酸化防止剤は、例えば、ケイ素金属、アルミニウム金属、ケイ素アルミニウム合金、炭化ホウ素や炭化ケイ素等の炭化物であるが、これらに限定されるものではない。   The antioxidant suppresses oxidation of other components of the refractory material and may be any single material or combination of such materials that suppress oxidation in the refractory system. The amount of antioxidant can be up to about 10% by weight. The antioxidant is, for example, silicon metal, aluminum metal, silicon aluminum alloy, carbide such as boron carbide or silicon carbide, but is not limited thereto.

本発明を更に十分に説明できるよう、鋼ストリップの連続鋳造に関して特定の一実施例を添付図面を参照して記述する。     In order that the present invention may be more fully described, one particular embodiment for continuous casting of a steel strip will be described with reference to the accompanying drawings.

双ロール鋳造機１１を構成する主機械フレーム２１は、鋳造表面２２Ａを有する一対の内部冷却される鋳造ロール２２を支持する。鋳造ロール２２は横方向に互いに隣接配置して、鋼ストリップが形成されるようロール間にロール間隙を形成する。双ロール鋳造機はアメリカ特許第５，１８４，６６８号、第５，２７７，２４３号、第５，４８８，９８８号に示されるようなものであってよく、より細部についてはこれらを参照することができる。   The main machine frame 21 constituting the twin roll casting machine 11 supports a pair of internally cooled casting rolls 22 having a casting surface 22A. The casting rolls 22 are arranged adjacent to each other in the transverse direction to form a roll gap between the rolls so that a steel strip is formed. The twin roll caster may be as shown in US Pat. Nos. 5,184,668, 5,277,243, 5,488,988, see these for more details. Can do.

溶鋼はストリップの連続鋳造用に、取鍋（図示せず）からタンディッシュ２３まで供給される。タンディッシュ２３からは、溶鋼は耐火物で裏打ちされたシュラウド２４により金属供給システムを介し、これまた耐火物で裏打ちされた移行部ノズルブロック２５に供給される。ストッパ１８は、接続部１７でシュラウド２４に取付けられる耐火物でできた入口２１に着座し、タンディッシュ２３からシュラウド２４への溶鋼の流れを調節する。ストッパ１８は可動であって、タンディッシュ２３からシュラウド２４への溶鋼の流れを調節する。   Molten steel is fed from a ladle (not shown) to the tundish 23 for continuous casting of the strip. From the tundish 23, the molten steel is fed through a metal supply system by a shroud 24 lined with a refractory and to a transition nozzle block 25 which is also lined with a refractory. The stopper 18 is seated on an inlet 21 made of a refractory attached to the shroud 24 at the connecting portion 17 and regulates the flow of molten steel from the tundish 23 to the shroud 24. The stopper 18 is movable and adjusts the flow of molten steel from the tundish 23 to the shroud 24.

移行部ノズルブロック２５は、外部雰囲気に触れないよう全体に溶鋼を囲むように構成されており、移行部内の金属が溢流点に達した場合に溶鋼が流れ出ることができる溢流部１９を備えている。溶鋼はシュラウド２４から移行部２５へと、通常は移行部の溶融金属充填ライン１６より下になるように供給されて、溶融金属が空気に触れるのを最小限にする。   The transition portion nozzle block 25 is configured to surround the molten steel so as not to touch the external atmosphere, and includes an overflow portion 19 from which the molten steel can flow out when the metal in the transition portion reaches the overflow point. ing. Molten steel is fed from the shroud 24 to the transition 25, usually below the transition metal fill line 16 of the transition, to minimize exposure of the molten metal to the air.

移行部ノズルブロック２５からは、溶鋼は耐火材製の供給ノズル２６によって鋳造溜め３０に供給される。鋳造溜め３０の上面３１（一般に、メニスカスレベルと呼ばれる）が供給ノズル２６の下端より上に来ることによって、供給ノズル下端が、一対の側部閉止堰又は閉止板２８によりロール端で閉じ込められる鋳造溜め３０に浸漬してもよい。   From the transition part nozzle block 25, the molten steel is supplied to the casting pool 30 by a supply nozzle 26 made of a refractory material. A casting reservoir in which the lower end of the supply nozzle is confined at the roll end by a pair of side closing weirs or closing plates 28 when the upper surface 31 of the casting reservoir 30 (generally called the meniscus level) comes above the lower end of the supply nozzle 26. 30 may be immersed.

鋳造溜め３０は、鋳造ロール２２間のロール間隙２７上方に位置して鋳造ロール表面２２Ａで支持される。鋳造ロール２２は駆動されて相互方向に回転し、通常は水の循環により内部冷却される。鋳造ロールが回転すると、金属殻が鋳造溜め３０から、移動する鋳造ロール表面２２Ａに凝固する。殻は鋳造ロール２２間のロール間隙２７で合わせられて凝固ストリップを生み出し、それがロール間隙２７から下方に送給される。   The casting pool 30 is positioned above the roll gap 27 between the casting rolls 22 and supported by the casting roll surface 22A. The casting roll 22 is driven to rotate in the mutual direction and is usually internally cooled by the circulation of water. As the casting roll rotates, the metal shell solidifies from the casting pool 30 to the moving casting roll surface 22A. The shells are brought together at a roll gap 27 between the casting rolls 22 to produce a solidified strip that is fed downward from the roll gap 27.

移行部ノズルブロック２５と供給ノズル２６は、本発明の耐火材で造ることができる。耐火材の組成は、５０〜８５重量％のジルコニア、０〜３５重量％のシリカ、５重量％未満のアルミナ、５〜３５重量％の炭素、及び酸化防止剤である。耐火材のジルコニア（ＺｒＯ２）含量は６０〜８５重量％とすることができ、より明細には７０〜８０重量％とすることができる。耐火材の炭素含量は８〜３０重量％とすることができ、より明細には１０〜２０重量％とすることができる。酸化防止剤は約１０重量％までとすることができ、例えばケイ素金属、アルミニウム金属、又は炭化ホウ素又は炭化ケイ素等の炭化物とすることができる。耐火物は安定化したものでも、していないものでもよいが、使用時に溶鋼との接触で耐火物上に摩耗が生じるのを減らすよう安定化を石灰（ＣａＯ）又は酸化マグネシウム（ＭｇＯ）又はそれらの組み合わせで行うことができる。石灰又は酸化マグネシウムの量は約２８重量％未満とすることができる。 The transition nozzle block 25 and the supply nozzle 26 can be made of the refractory material of the present invention. The composition of the refractory material is 50-85 wt% zirconia, 0-35 wt% silica, less than 5 wt% alumina, 5-35 wt% carbon, and antioxidant. The zirconia (ZrO 2 ) content of the refractory material can be 60 to 85% by weight, more specifically 70 to 80% by weight. The carbon content of the refractory material can be 8-30% by weight, more specifically 10-20% by weight. The antioxidant can be up to about 10% by weight and can be, for example, silicon metal, aluminum metal, or a carbide such as boron carbide or silicon carbide. The refractory may or may not be stabilized, but the stabilization is reduced to lime (CaO) or magnesium oxide (MgO) or to reduce wear on the refractory in contact with molten steel during use. Can be done in combination. The amount of lime or magnesium oxide can be less than about 28% by weight.

斯かる耐火材は、例えば、以下の組成を持つことができる。
ジルコニア ７４％
シリカ ０６％
炭素 １２％ Such a refractory material can have the following composition, for example.
Zirconia 74%
Silica 06%
Carbon 12%

耐火物の化学組成の残りは、安定化のために意図的に加えられた石灰等の他の材料（例えば３％）と、不純物であってよい。いずれにせよ、耐火物は炭素結合されたケイ酸グラファイトである。   The remainder of the chemical composition of the refractory may be impurities with other materials such as lime added intentionally for stabilization (eg 3%). In any case, the refractory is carbon bonded graphite silicate.

特定の組成の耐火物の典型的な物理特性は以下の通りである。
容積密度 ３．７０ｇ／ｃｃ
見掛け気孔率 １５％
破壊応力（ｒｔ） １０００ポンド／平方インチ Typical physical properties of a refractory with a specific composition are as follows:
Volume density 3.70 g / cc
Apparent porosity 15%
Breaking stress (rt) 1000 pounds per square inch

上記したような耐火材の利点は、溶融金属が耐火物に接して流れるときに耐火物に付着してスラグを形成しないことである。斯かるスラグは通常は鋳造溜め３０のメニスカスに集まり、そこで壊れて凝固中の殻に、そしてストリップ１２に入ってストリップ内とストリップ表面に欠陥を生じる。本発明のジルコニア炭素耐火物では、斯かるスラグ形成が抑制され、双ロール鋳造機で連続鋳造されるストリップのストリップ品質が改良される。   The advantage of the refractory material as described above is that when the molten metal flows in contact with the refractory, it does not adhere to the refractory and form slag. Such slag normally collects in the meniscus of the casting pool 30 where it breaks into the solidifying shell and enters the strip 12 causing defects in the strip and on the strip surface. In the zirconia carbon refractory of the present invention, such slag formation is suppressed, and the strip quality of the strip continuously cast by the twin roll casting machine is improved.

以上、本発明を図面と説明で詳細に例示・記述してきたが、それは例示的なものであって限定的性格のものではなく、単に本発明の例示的な実施例を図示・記述したのであり、本発明の要旨の範囲内にある全ての変更例、改変例が保護されると理解される。本発明の追加の特徴は、記述を考慮することにより当業者にとっては明らかであろう。改変は本発明の要旨及び範囲内で行うことが可能である。   Although the invention has been illustrated and described in detail in the drawings and description above, it has been shown and described by way of example only and not by way of limitation. It is understood that all changes and modifications within the scope of the present invention are protected. Additional features of the present invention will be apparent to those skilled in the art from consideration of the description. Modifications can be made within the spirit and scope of the present invention.

金属供給システムを介し双ロール鋳造機へと流れる溶鋼の流れを示す。The flow of molten steel flowing through a metal supply system to a twin roll caster is shown.

Claims (35)

５０〜８５重量％のジルコニア、０〜３５重量％のシリカ、５％未満のアルミナ、５〜３５％の炭素、及び酸化防止剤からなる、製鋼時の溶融金属供給のための耐火物。   A refractory for supplying molten metal at the time of steelmaking, comprising 50 to 85% by weight of zirconia, 0 to 35% by weight of silica, less than 5% of alumina, 5 to 35% of carbon, and an antioxidant. ジルコニアの重量％が６０〜８５重量％である、請求項１に記載の製鋼時の溶融金属供給のための耐火物。   The refractory for supplying molten metal at the time of steelmaking according to claim 1, wherein the weight percent of zirconia is 60 to 85 weight percent. ジルコニアの重量％が７０〜８０重量％である、請求項１に記載の製鋼時の溶融金属供給のための耐火物。   The refractory for supplying molten metal at the time of steelmaking according to claim 1, wherein the weight percent of zirconia is 70 to 80 weight percent. 炭素の重量％が８〜３０重量％である、請求項１乃至３のいずれかに記載の製鋼時の溶融金属供給のための耐火物。   The refractory for supplying molten metal at the time of steelmaking according to any one of claims 1 to 3, wherein the weight percentage of carbon is 8 to 30 weight%. 炭素の重量％が１０〜２０重量％である、請求項４に記載の製鋼時の溶融金属供給のための耐火物。   The refractory for supplying molten metal at the time of steelmaking according to claim 4, wherein the weight percent of carbon is 10 to 20 weight percent. 耐火材が石灰、酸化マグネシウム又はそれらの組合せで安定化される、請求項１乃至５のいずれかに記載の製鋼時の溶融金属供給のための耐火物。   The refractory for supplying molten metal during steelmaking according to any one of claims 1 to 5, wherein the refractory material is stabilized with lime, magnesium oxide or a combination thereof. 酸化防止剤が約１０重量％までで構成される、請求項１乃至６のいずれかに記載の製鋼時の溶融金属供給のための耐火物。   The refractory for supplying molten metal at the time of steelmaking according to any one of claims 1 to 6, wherein the antioxidant comprises up to about 10% by weight. ５０〜８５％のジルコニア、０〜３５％のシリカ、５％未満のアルミナ、５〜３５％の炭素、及び酸化防止剤からなる、鋼ストリップの連続鋳造による製鋼時の溶融金属供給のための耐火物。   Refractory for supplying molten metal during steelmaking by continuous casting of steel strip, consisting of 50-85% zirconia, 0-35% silica, less than 5% alumina, 5-35% carbon, and antioxidant. object. ジルコニアの重量％が６０〜８５重量％である、請求項８に記載の鋼ストリップの連続鋳造による製鋼時の溶融金属供給のための耐火物。   The refractory for supplying molten metal during steelmaking by continuous casting of a steel strip according to claim 8, wherein the weight percent of zirconia is 60 to 85 weight percent. ジルコニアの重量％が７０〜８０重量％である、請求項８に記載の鋼ストリップの連続鋳造による製鋼時の溶融金属供給のための耐火物。   The refractory for supplying molten metal during steelmaking by continuous casting of a steel strip according to claim 8, wherein the weight percentage of zirconia is 70 to 80 weight%. 炭素の重量％が８〜３０重量％である、請求項８乃至１０のいずれかに記載の鋼ストリップの連続鋳造による製鋼時の溶融金属供給のための耐火物。   The refractory for supplying molten metal at the time of steelmaking by continuous casting of a steel strip according to any one of claims 8 to 10, wherein the weight percentage of carbon is 8 to 30 weight%. 炭素の重量％が１０〜２０重量％である、請求項１１に記載の鋼ストリップの連続鋳造による製鋼時の溶融金属供給のための耐火物。   The refractory for supplying molten metal at the time of steelmaking by continuous casting of a steel strip according to claim 11, wherein the weight percentage of carbon is 10 to 20 weight%. 耐火材が石灰、酸化マグネシウム又はそれらの組合せで安定化される、請求項８乃至１２のいずれかに記載の鋼ストリップの連続鋳造による製鋼時の溶融金属供給のための耐火物。   The refractory for supplying molten metal during steelmaking by continuous casting of a steel strip according to any one of claims 8 to 12, wherein the refractory material is stabilized with lime, magnesium oxide or a combination thereof. 酸化防止剤が約１０重量％までで構成される、請求項８乃至１３のいずれかに記載の鋼ストリップの連続鋳造による製鋼時の溶融金属供給のための耐火物。   A refractory for supplying molten metal during steelmaking by continuous casting of a steel strip according to any of claims 8 to 13, wherein the antioxidant comprises up to about 10% by weight. ５０〜８５％のジルコニア、０〜３５％のシリカ、５％未満のアルミナ、５〜３５％の炭素、及び酸化防止剤からなる組成を有する、鋼ストリップの連続鋳造による製鋼のための供給ノズル。   A feed nozzle for steelmaking by continuous casting of a steel strip having a composition consisting of 50-85% zirconia, 0-35% silica, less than 5% alumina, 5-35% carbon, and an antioxidant. ジルコニアの重量％が６０〜８５重量％である、請求項１５に記載の鋼ストリップの連続鋳造による製鋼のための供給ノズル。   16. A feed nozzle for steelmaking by continuous casting of a steel strip according to claim 15, wherein the weight percent of zirconia is 60 to 85 weight percent. ジルコニアの重量％が７０〜８０重量％である、請求項１５に記載の鋼ストリップの連続鋳造による製鋼のための供給ノズル。   16. A feed nozzle for steelmaking by continuous casting of a steel strip according to claim 15, wherein the weight percent of zirconia is 70 to 80 weight percent. 炭素の重量％が８〜３０重量％である、請求項１５乃至１７のいずれかに記載の鋼ストリップの連続鋳造による製鋼のための供給ノズル。   18. A feed nozzle for steel making by continuous casting of a steel strip according to any of claims 15 to 17, wherein the weight percent of carbon is 8 to 30 weight percent. 炭素の重量％が１０〜２０重量％である、請求項１８に記載の鋼ストリップの連続鋳造による製鋼のための供給ノズル。   19. A feed nozzle for steel making by continuous casting of a steel strip according to claim 18, wherein the weight percent of carbon is 10 to 20 weight percent. 耐火材が石灰、酸化マグネシウム又はそれらの組合せで安定化される、請求項１５乃至１９のいずれかに記載の鋼ストリップの連続鋳造による製鋼のための供給ノズル。   A feed nozzle for steel making by continuous casting of a steel strip according to any of claims 15 to 19, wherein the refractory material is stabilized with lime, magnesium oxide or a combination thereof. 酸化防止剤が約１０重量％までで構成される、請求項１５乃至２０のいずれかに記載の鋼ストリップの連続鋳造による製鋼のための供給ノズル。   21. Feed nozzle for steelmaking by continuous casting of a steel strip according to any of claims 15 to 20, wherein the antioxidant comprises up to about 10% by weight. ５０〜８５％のジルコニア、０〜３５％のシリカ、５％未満のアルミナ、５〜３５％の炭素、及び酸化防止剤からなる組成を有する、鋼ストリップの連続鋳造による製鋼時の流れ制御のための移行部ノズルブロック。   For flow control during steelmaking by continuous casting of a steel strip having a composition comprising 50-85% zirconia, 0-35% silica, less than 5% alumina, 5-35% carbon, and an antioxidant. Transition part nozzle block. ジルコニアの重量％が６０〜８５重量％である、請求項２２に記載の鋼ストリップの連続鋳造による製鋼時の流れ制御のための移行部ノズルブロック。   23. A transition nozzle block for flow control during steelmaking by continuous casting of a steel strip according to claim 22, wherein the weight percent of zirconia is 60 to 85 weight percent. ジルコニアの重量％が７０〜８０重量％である、請求項２２に記載の鋼ストリップの連続鋳造による製鋼時の流れ制御のための移行部ノズルブロック。   23. A transition nozzle block for flow control during steel making by continuous casting of a steel strip according to claim 22, wherein the weight percent of zirconia is 70 to 80 weight percent. 炭素の重量％が８〜３０重量％である、請求項２２乃至２４のいずれかに記載の鋼ストリップの連続鋳造による製鋼時の流れ制御のための移行部ノズルブロック。   25. A transition nozzle block for flow control during steelmaking by continuous casting of a steel strip according to any one of claims 22 to 24, wherein the weight percentage of carbon is 8 to 30 weight%. 炭素の重量％が１０〜２０重量％である、請求項２５に記載の鋼ストリップの連続鋳造による製鋼時の流れ制御のための移行部ノズルブロック。   26. A transition nozzle block for flow control during steelmaking by continuous casting of a steel strip according to claim 25, wherein the carbon wt% is 10-20 wt%. 耐火材が石灰、酸化マグネシウム又はそれらの組合せで安定化される、請求項２２乃至２６のいずれかに記載の鋼ストリップの連続鋳造による製鋼時の流れ制御のための移行部ノズルブロック。   27. A transition nozzle block for flow control during steelmaking by continuous casting of a steel strip according to any of claims 22 to 26, wherein the refractory material is stabilized with lime, magnesium oxide or a combination thereof. 酸化防止剤が最高約１０重量％までで構成される、請求項２２乃至２７のいずれかに記載の鋼ストリップの連続鋳造による製鋼時の流れ制御のための移行部ノズルブロック。   28. A transition nozzle block for flow control during steel making by continuous casting of a steel strip according to any of claims 22 to 27, wherein the antioxidant comprises up to about 10% by weight. ａ．間にロール間隙を有し、ロール間隙両端に隣接した閉じ込め閉止部を備えた、一対の冷却された鋳造ロールを組立て、
ｂ．溶鋼に接触する少なくとも一部が耐火材で構成された、鋳造ロール間に溶鋼を供給してロール間に支持された鋳造溜めを形成する金属供給システムを組立て、耐火材の組成を５０〜８５％のジルコニア、０〜３５％のシリカ、５〜３５％の炭素、５％未満のアルミナ、及び酸化防止剤とし、
ｃ．鋳造ロールを相互回転させて鋳造ロール表面に金属殻を形成し、凝固した薄鋼ストリップを鋳造ロール間のロール間隙を通し下方に送給する、
段階からなる鋼ストリップの連続鋳造方法。 a. Assembling a pair of cooled cast rolls with a roll gap in between and with confinement closures adjacent to both ends of the roll gap;
b. Assemble a metal supply system that forms a casting pool supported between rolls by supplying molten steel between casting rolls, at least part of which is made of refractory material in contact with the molten steel, and the composition of the refractory material is 50 to 85% Zirconia, 0-35% silica, 5-35% carbon, less than 5% alumina, and an antioxidant,
c. The casting rolls are mutually rotated to form a metal shell on the casting roll surface, and the solidified thin steel strip is fed downward through the roll gap between the casting rolls.
A method of continuous casting of steel strip consisting of stages. ジルコニアの重量％が６０〜８５重量％である、請求項２９に記載の鋼ストリップの連続鋳造方法。   30. The method for continuous casting of a steel strip according to claim 29, wherein the weight percent of zirconia is 60 to 85 weight percent. ジルコニアの重量％が７０〜８０重量％である、請求項２９に記載の鋼ストリップの連続鋳造方法。   30. The method for continuous casting of a steel strip according to claim 29, wherein the weight percent of zirconia is 70 to 80 weight percent. 炭素の重量％が８〜３０重量％である、請求項２９乃至３１のいずれかに記載の鋼ストリップの連続鋳造方法。   32. The continuous casting method of a steel strip according to any one of claims 29 to 31, wherein the weight percent of carbon is 8 to 30 weight percent. 炭素の重量％が１０〜２０重量％である、請求項３２に記載の鋼ストリップの連続鋳造方法。   The method for continuous casting of a steel strip according to claim 32, wherein the weight percent of carbon is 10 to 20 weight percent. 耐火材が石灰、酸化マグネシウム又はそれらの組合せで安定化される、請求項２９乃至３３のいずれかに記載の鋼ストリップの連続鋳造方法。   34. A method for continuous casting of a steel strip according to any of claims 29 to 33, wherein the refractory material is stabilized with lime, magnesium oxide or a combination thereof. 酸化防止剤が約１０重量％までで構成される、請求項２９乃至３４のいずれかに記載の鋼ストリップの連続鋳造方法。   35. A method for continuous casting of a steel strip according to any of claims 29 to 34, wherein the antioxidant comprises up to about 10% by weight.
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WO2005123301A1 (en) 2005-12-29
CN101014431A (en) 2007-08-08
EP1771266A1 (en) 2007-04-11
EP1771266A4 (en) 2007-09-26
KR20070051785A (en) 2007-05-18
US20050280192A1 (en) 2005-12-22
AU2005254119A1 (en) 2005-12-29

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