201107496 六、發明說明： 【發明所屬之技彳标領域】 發明領域 本發明係有關於一種鋼的連續鑄造方法及在鋼的連續 鑄造中所使用的耐火物。 本申請係基於2009年5月27日在日本提出申請之特願 2009-127876號而主張優先權，並將其内容引用於此。 發明背景 在鋼的連續鑄造，在將熔鋼從澆斗(ladle)注入澆口盤 (tundish)時，或從澆口盤透過浸潰喷嘴注入鑄模時，為了調 整熔鋼的流量之目的，係使用具有熔鋼的通過孔之滑動喷嘴。 該滑動喷嘴係使複數片形成有通過孔的板狀物疊合而 構成。藉由使該板狀物滑動，能夠調節熔鋼的通過孔之開 度且能夠調整熔鋼的流量。 但是，使用連續鑄造方法所製造的鋼，已知有高氧鋼、 無鉛快削鋼、高錳鋼等。在該等鋼為了提升強度或快削性， 係添加用以提升快削性之B4C。 對於含有此種成分之熔鋼，使用先前之以氧化鋁-碳質 耐火物所形成的滑動喷嘴時，會有熔鋼通過面或滑動面產 生重大損傷’致使滑動噴嘴的壽命變短之問題。 因此，為了謀求滑動喷嘴的長壽命化之目的，如專利 文獻1所記載’提案揭示一種含有96質量％以上的理論組成 尖晶石及4質量。/。以下的碳原料之滑動喷嘴。 201107496 依照前述專利文獻1 ’在運轉面附近於1200°C以上的高 溫下，從尖晶石分解所生成的Mg(g :氣體）、Ah〇3(g)、co(g)， 藉由下述式(1)所示的逆反應來生成尖晶石的緻密層。 Mg(g)+Al2〇3(g)+3CO(g) —>Mg〇 . Al2〇3(s .固體)+3C(s) . · · (1) 又，在文獻1，記載前述Mg(g)、Al2〇3(g)係與熔鋼中的 氧〇產生如下述式(2)所示之反應，來生成尖晶石的緻密層。201107496 VI. Description of the Invention: [Technical Field of the Invention] Field of the Invention The present invention relates to a continuous casting method for steel and a refractory used in continuous casting of steel. The present application claims priority based on Japanese Patent Application No. 2009-127876, filed on Jan. BACKGROUND OF THE INVENTION In continuous casting of steel, when molten steel is injected into a tundish from a ladle or injected into a mold from a tundish through an impregnation nozzle, in order to adjust the flow rate of the molten steel, A sliding nozzle with a through hole of molten steel is used. The sliding nozzle is constructed by laminating a plurality of sheets formed with a plate through a hole. By sliding the plate, the opening of the through hole of the molten steel can be adjusted and the flow rate of the molten steel can be adjusted. However, high-oxygen steel, lead-free quick-cut steel, high-manganese steel, and the like are known as steels produced by the continuous casting method. In order to improve the strength or the rapid cutting property of these steels, B4C for improving the fast cutting property is added. When a sliding nozzle formed of an alumina-carbonaceous refractory material is used for a molten steel containing such a component, there is a problem that the molten steel passes through the surface or the sliding surface to cause a serious damage, resulting in a shortened life of the sliding nozzle. Therefore, in order to achieve a long life of the sliding nozzle, the proposal disclosed in Patent Document 1 discloses a theoretical composition of spinel and a mass of 96% by mass or more. /. The following sliding nozzles for carbon materials. 201107496 According to the aforementioned Patent Document 1 'Mg (g: gas), Ah 〇 3 (g), co (g) generated by spinel decomposition at a high temperature of 1200 ° C or higher in the vicinity of the running surface, by The reverse reaction shown in the above formula (1) produces a dense layer of spinel. Mg(g)+Al2〇3(g)+3CO(g)—>Mg〇. Al2〇3(s.solid)+3C(s) . (1) Further, in Document 1, the aforementioned Mg is described. (g), Al2〇3(g) and oxonium in the molten steel produce a reaction as shown in the following formula (2) to form a dense layer of spinel.
Mg(g)+Al203(g)+30(g) ->MgO · Al203(s) · . · (2) 在專利文獻1 ’係藉由在滑動噴嘴表面使此種尖晶石的 緻也、層形成’來嘗試抑制礦 >查（slag)的濕潤而防止熔損。 [先前技術文獻] [專利文獻] [專利文獻1]特開2002-29833號公報 C發明内容】 發明概要 發明欲解決之課題 但是，在前述專利文獻1所記載之技術，無法充分地形 成尖晶石的緻密層，防止熔損係困難的。 本發明係以提供一種在製造高氧鋼、無鉛快削鋼、高 猛鋼等時，能夠降低熔鋼供給用喷嘴的熔損，來安定地進 行連續鑄造之鋼的連續鑷造方法及使用其之耐火物作為目 用以欲解決課題之手段 為了解決上述課題，本發明係採用以下的構成。 (1)本發明的第1態樣係一種鋼的連續鑄造方法，其係將 201107496 含有0.15質量％以上、3.0質量％以下的Μη、0.005質量％以 上、0.06質量％以下的Ο、被限制為0.01質量％以下的Α卜 0.0006質量％以上、0.08質量％以下的C、0.003質量％以上、 0.04質量％以下的8卜0.006質量％以上、0.1質量％以下的？、 0.004質量％以上、0.5質量％以下的S、0.0015質量％以上、 0.02質量％以下的N、0.001質量％以上、0.03質量。/。以下的B 及包含Fe和不可避免的不純物的剩餘部分之熔鋼保持在第 1容器；並且透過滑動喷嘴將前述熔鋼供給至第2容器，該 滑動喷嘴係在含有4 5質量％以上、9 4質量％以下的理論組成 之尖晶石原料、1質量％以上、50質量％以下的氧化鋁原料、 1質量。/。以上、7質量％以下的金屬A1、0.5質量％以上、2質 量％以下的金屬Si、0.5質量％以上、4質量％以下的碳原料、 0.1質量％以上、1質量％以下的B4C及包含不可避免的不純 物的剩餘部分之原料，另外添加2質量％以上、6質量％以下 的黏合劑並混煉、成形而得到。 (2) 如上述（1)所記載之鋼的連續鑄造方法，其中前述氧 化鋁原料亦可含有90質量％以上、100質量％以下之最小粒 徑為0.1mm以上、最大粒徑為5mm以下的氧化紹粒。 (3) 如上述（1)或(2)所記載之鋼的連續鑄造方法，其中在 前述滑動喷嘴的上側設置有上喷嘴且在前述滑動喷嘴的下 側設置有下喷嘴，前述上喷嘴及前述下喷嘴的至少一者亦 可以是在前述原料，另外添加2質量％以上、6質量％以下的 黏合劑並混煉、成形而得到。 (4) 如上述(3)所記載之鋼的連續鑄造方法，其中在前述 201107496 下喷嘴的下側更設置有浸潰喷嘴，前述浸潰喷嘴亦可以是 在前述原料，另外添加2質量％以上、6質量％以下的黏合劑 並混煉、成形而得到。 (5) 如上述(3)所記載之鋼的連續鑄造方法，其中在前述 喷嘴的下側更設置有用以將熔鋼從澆斗供給至澆口盤之供 給喷嘴，前述供給喷嘴亦可以是在前述原料，另外添加2質 量％以上、6質量％以下的黏合劑並混煉、成形而得到。 (6) 本發明的第2態樣係一種耐火物，其係在使用熔鋼之 鋼的連續鑄造方法所使用之耐火物，該熔鋼係含有0.15質 量％以上、3.0質量％以下的Μη、0.005質量％以上、0.06質 量％以下的Ο、被限制為0.01質量％以下的ΑΙ、0.0006質量％ 以上、0.08質量％以下的C、0.003質量％以上、0.04質量％ 以下的Si、0.006質量％以上、0.1質量％以下的Ρ、0.004質 量％以上、0.5質量％以下的S、0.0015質量％以上、0.02質 量％以下的N、0.001質量％以上、0·03質量％以下的B及包 含Fe和不可避免的不純物的剩餘部分，該耐火物係在含有 45質量％以上、94質量％以下的理論組成之尖晶石原料、1 質量％以上、50質量％以下的氧化鋁原料、1質量％以上、7 質量％以下的金屬A卜0.5質量％以上、2質量％以下的金屬 Si、0.5質量％以上、4質量％以下的碳原料、0.1質量％以上、 1質量％以下的B4C及包含不可避免的不純物的剩餘部分之 原料，另外添加2質量°/〇以上、6質量％以下的黏合劑並混 煉、成形而得到。 (7) 如（6)所記載之耐火物，其中前述氧化鋁原料亦可含 201107496 有90質量。/〇以上、100質量％以下之最小粒徑為0· lmm以 上、最大粒徑為5mm以下的氧化铭粒。 發明效果 依照本發明，藉由使用將前述原料混煉、成形而得到 的滑動喷嘴或耐火物來進行鋼的連續鑄造，因為能夠降低 熔鋼中的夾雜物亦即MnO、B2〇3所引起之滑動喷嘴或耐火 物等的熔損，而能夠安定地進行連續鑄造。 圖式簡單說明 第1圖係表示本發明的一實施形態之連續鑄造方法所 使用的滑動喷嘴的構造之模式剖面圖。 第2圖係表示在第1圖的熔鋼供給口附近的構造之部分 放大剖面圖。 第3圖係用以說明實施例之實驗方法之模式圖。 第4圖係用以說明實施例的效果之圖表。 第5圖係用以說明實施例的效果之圖表。 第6圖係用以說明實施例的效果之圖表。 I：實施方式3 用以實施發明之形態 — 本發明係具體上藉由以下的作用來防止滑動喷嘴或耐 火物的熔損。以下，將滑動喷嘴作為耐火物的一個例子來 說明。 通常，滑動喷嘴的熔損係外來的礦渣在滑動噴嘴的表 面進行反應，又，係礦渣成分或反應後的成分在滑動喷嘴 内濕潤而進行，決定該進行速度係滑動喷嘴的氣孔狀態、 201107496 滑動喷嘴时材成分及外來的礦渣成分等。在高氧鋼、無 錯快削鋼、高_等_種，在㈣鋼生成之非金屬夾雜 物聚集而生成的礦渣，包含]^11〇、b2〇3的成分。 而且’該等失雜物係黏附在包含Al2〇3、Mg〇、Zr〇2# 的滑動喷嘴之表面時，會生成贿點物，致使滑動喷嘴產 生重大溶損。 因此’作為滑動噴嘴，本發明者等係著眼於藉由使用 將含有MgO . Al2〇3(尖晶石）及Al2〇3 (氧化銘)之原料混煉、 成形而得到的滑動噴嘴，來得到⑴Mg〇.彻谱礦渣中 的MnO固溶而固定化之效果；及⑺所添加的Al2〇3炫入礦渣 來提升黏度之效果。而且，本發明者等新發現藉由使用此 種滑動喷嘴，因為能夠抑制滑動喷嘴之與熔鋼接觸的表面 受到礦渣濕潤，所以能夠消除礦渣中的BO3所引起的熔損 增加分量。 ' 該結果，能夠大幅度地降低滑動喷嘴的熔損且能夠 謀求連續鑄造的安定化。 以下，基於上述的知識來說明本發明的一實施形態。 本發明的一實施形態之鋼的連續鑄造方法，係使用對 含有有理論組成尖晶石原料、氧化鋁原料、金屬A卜金屬 Si、礦原料、BW及不可避免的不純物之原料，另外添加2 質量％以上、6質量％以下的黏合劑並混煉、成形而得到的 滑動喷嘴。在原料’作為不可避免的不純物，雖然亦可含 有小於1質量％的不可避免的不純物，但是以極力不含有為佳。 在此，理論組成尖晶石原料係包含24質量。/。以上、3〇 8 201107496 質量％以下的MgO、70質量％以上、76質量。/〇以下的A1203， 且不可避免的不純物為1.5質量％以下時即可，例如能夠使 用電熔尖晶石、燒結尖晶石等作為尖晶石原料。 又，氧化鋁原料係例如含有95質量％以上、較佳是98 質量％以上的Al2〇3，且不可避免的不純物為小於5質量％、 較佳是小於2質量％時即可。例如，能夠使用電熔氧化鋁、 燒結氧化鋁等作為氧化鋁原料。 又，在如述滑動嘴嘴的原料，理論組成尖晶石原料係 45質量％以上、94質量°/。以下的範圍，且氧化鋁原料係1質 量°/。以上、50質量％以下的範圍時即可。藉此，如後述，能 夠提升耐熔損性。 在前述滑動喷嘴的原料，金屬A1為1質量％以上、7質 量％以下的範圍即可。金屬A1為小於1質量％時，财钱性、 耐氧化性、強度有低落的傾向。又，金屬A1為大於7質量％ 時耐蝕性、耐剝落性有低落的傾向。又，金屬A1的含量以2 質量％以上、6質量％以下為佳。 在前述滑動喷嘴的原料，金屬Si為0.5質量％以上、2質 量％以下的範圍即可。金屬Si為小於0.5質量％時，耐蝕性、 耐氧化性、強度有低落的傾向。又，大於2質量％時彈性模 數變高且耐剝落性有低落的傾向。 在前述滑動喷嘴的原料，碳原料為〇.5質量％以上、4 質量％以下的範圍即可。碳原料為小於小於0.5質量％時， 而才剝落性有低落的傾向，大於4質量％時，对氧化性有低落 的傾向。又’碳原料能夠使用$炭黑、石墨、遞青。而且’ 201107496 碳原料的含量以0.5質量％以上、3.0質量％以下為佳。 在前述滑動喷嘴的原料，B4C係0.1質量％以上、1質量 %以下的範圍時即可。B4C為小於0.1質量％時，耐氧化性有 低落的傾向，大於1質量％時，而ί银性有變差之傾向。 前述的滑動喷嘴能夠藉由在前述組成的原料，另外添 加2質量％以上、6質量％以下的黏合劑並混煉、成形來得 到。又，按照必要，成形後亦可在150°C以上、250°C以下 的環境將成形體乾燥後，於非氧化性環境在800°C以上、 1400°C以下的溫度煅燒。而且，亦可在成形體進行浸潰焦 油或瀝青處理。 作為黏合劑，能夠使用酚樹脂、環氧樹脂、聚矽氧樹 脂、瀝青等的有機系黏合劑。 前述滑動喷嘴係安裝在澆斗、澆口盤等的熔鋼供給 口，來實施無鉛快削鋼等之鋼的連續鑄造方法。在鋼的連 續鑄造方法，係依照按照鋼的原料之先前的鑄造條件進行 即可。 又，前述的滑動喷嘴可安裝在澆斗、澆口盤的熔鋼供 給口之任一者。從連續鑄造的安定化之觀點，滑動喷嘴以 安裝在洗斗、淹口盤的溶鋼供給口之雙方為佳。 而且，在前述原料之氧化鋁原料亦可以主要含有最小 粒徑為〇· 1mm以上、較佳是0.5mm以上且最大粒徑為5mm以 下、較佳是3mm以下的氧化鋁粒。 氧化銘原料的氧化铭粒之最小粒徑為小於〇· 1 mm時， 因為氧化铭原料的比表面積增加，氧化I呂原料容易溶解， 10 201107496 滑動喷嘴㈣火物）㈣損變大。另_方面，氧化M料的氧 化銘粒之最大粒&大於5麵時，氧化銘原料的比表面積降 低而氧化㈣料變秘以溶解，致使供給至礦_Al2〇3成 分減少’提高礦_性之效果減少。因此，無法充分地抑 制礦渣濕潤，致使滑動喷嘴的熔損變大。而且，「主要含有 最小粒徑為0.1mm以上且最大粒徑為5mm以下的氧化鋁粒 之氧化銘原料」’係含有9〇質量。/。以上、1〇〇質量％以下之能 夠通過5mmI帛但無法通過〇.lmm篩的氧化鋁粒之氧化鋁原 料時即可。又，在此，最小粒徑及最大粒徑係各自意味著 氧化铭粒之最小粒徑及最大粒徑。 在本發明，作為使用前述原料之耐火物，不只是滑動 噴嘴，亦可形成設置於該滑動喷嘴的上側之上喷嘴及設置 於下側之下喷嘴。而且亦可形成設置於下喷嘴的下側之將 熔鋼從滑動噴嘴注入鑄模之浸漬噴嘴，及將熔鋼從澆斗注 入澆口盤之長噴嘴(供給喷嘴）。 在該等喷嘴的内面，因為熔鋼流動，雖然未達到滑動 喷嘴程度，但是仍然會產生起因於MnO、B2〇3之熔損。因 此，藉由使用前述原料形成該等噴嘴，能夠降低該等的溶 損，能夠謀求連續鑄造的更安定化。 以下，對本發明的一實施形態之鋼的連續鑄造方法， 基於圖式而更詳細地說明。在第1圖係顯示本發明的實施形 態之洗口盤1。該洗口盤1係用以將溶鋼供給至鎢模2之容器。 如第1圖之以圓記號包圍的部分之部分放大圖之第2圖 所示，洗口盤1係設置於熔鋼供給口，在設置於熔鋼供給口 201107496 的下面之滑動喷嘴3的上側設置有上喷嘴4，而且在滑動喷 嘴3的下側設置有下喷嘴5。在下喷嘴5的下側更設置有浸潰 喷嘴6。 滑動喷嘴3、上喷嘴4、下噴嘴5、浸潰噴嘴6能夠在以 下的原料另外添加2質量％以上、6質量％以下的黏合劑並混 煉成瓜為聚體（slurry)狀的耐火物，並按照必要進行炮燒， 或浸潰瀝青或焦油而形成。 作為噴嘴3〜6的原料，例如能夠適合使用相對於74 6 質量％尖晶石原料、19.9質量％氧化銘原料、”量％金屬 A卜1質量％金屬Si、i質量％來自石墨的碳原料、〇 $質量 %B4C之合計100質量％，另外添加4質量％酚樹脂作為黏合 劑而成之原料。 又，滑動喷嘴3亦可進行煅燒或浸潰，上噴嘴4及下噴 嘴5亦可進行煅燒或浸潰，浸潰喷嘴及長喷嘴亦可進行煅 燒。又，亦可按照必要安裝金屬器具。 進行鋼的連續鑄造時，係在澆斗、澆口盤丨的熔鋼供給 口，戈·裝由前述原料形成的滑動喷嘴3、上喷嘴4、下喷嘴$、 浸潰喷嘴6、長喷嘴。 將含有0.15質量％以上、3.〇質量％以下的Mn、〇 〇〇5質 量％以上、0_06質量％以下的〇、被限制為〇 〇1質量％以下的 A卜0.0〇〇6質量％以上、〇.〇8質量％以下的c、〇〇〇3質量％ 以上、0·04質量％以下的Si、0.006質量％以上、〇·〗質量％以 下的P、0.004質量％以上、〇.5質量％以下的s、〇 〇〇15質量 %以上、〇.〇2質量。/。以下的N'〇 〇〇1質量％以上、〇 〇3質量％ 12 201107496 以下的B及包含pe和不可避免的不純物的剩餘部分之溶鋼 Μ ’從澆斗供給至澆口盤1。 在此’在熔鋼Μ的成分，因為Μη係在上述範圍，鋼材 的強度提升且在鋼材能夠生成MnS。又，因為〇係在上述範 圍’鋼材的成分能夠得到平衡。因為A1係被限制在上述的 值以下’能夠抑制鋼材中的氧水準。因為C係在上述範圍， 能夠提升鋼材的強度。因為Si係在上述範圍，能夠提升鋼 材的強度。因為P係在上述範圍，能夠防止鋼材的脆化。因 為S係在上述範圍，能夠在鋼材中生成MnS。因為N係在上 述範圍’能夠防止鋼材的脆化。因為B係在上述範圍，能夠 提升鋼材快削性。 被供給至澆口盤1的熔鋼Μ係邊接觸上喷嘴4的内壁、 滑動喷嘴3的孔内周緣、下喷嘴的内壁及浸潰喷嘴6的内 壁’邊從在浸潰喷嘴6的下端所形成的吐出口流入鑄模2(第 2容|§)。而且’藉由使用未圖示的驅動機構使滑動喷嘴3的 下側的孔之開口板狀物滑動’能夠調整供給至鑄模2之熔鋼 Μ的量。 此時’因為滑動嘴嘴3的孔部分及喷嘴4〜6的内壁係曝 路於溶鋼Μ ’先前成分的滑動喷嘴時，會產生起因於溶鋼 中的ΜηΟ、Β2〇3之炫損。相對地，依照本實施形態，因為 係使用前述原料來形成噴嘴3〜6，藉由地㈣办將礦潰 中的Μη⑽溶而固定化之同時，所添加的AW〗邊溶入擴潰 邊提升其黏度’能夠抑制健濕潤噴嘴卜6之與溶鋼接觸 的表面口此月匕夠抑制礦渣中的IQ〗所引起的炼損。 13 201107496 該結果，喷嘴3〜6在製造無鉛快削鋼時，相較於使用 先前的原料製造的喷嘴，能夠大幅度地降低熔損而謀求連 續鑄造的安定化。 又，前述實施形態，滑動喷嘴3係藉由組合2片孔敞開 的板狀物，並使下側的板狀物滑動，來調整將熔鋼Μ供給 至鑄模2之量，但是本發明亦可採用疊合3片開口板狀物而 成之滑動喷嘴。 [實施例] 隨後，說明本發明的實施例，但是本發明不被此限定。 [1]實驗方法 如第3圖所示，將含有6. lkg的無錯快削鋼的成分之溶 鋼Μ投入锆製的坩堝7内，並以在Ar環境下熔鋼溫度為約 1550°C的方式，使用感應加熱將熔鋼Μ加熱保持。在該熔 鋼Μ投入600g如下述表1所示之合成礦渣S並設定相當於無 鉛快削鋼的連續鑄造之實驗條件。熔鋼Μ的成分係設定為 1.2 質量％1^11、0.015 質量％0、$ 0.002 質量°/。八1、0.07 質量 %C、0.008 質量％8丨、0.08 質量％?、0.4 質量 ％S、0.008 質量 %N、0.01質量％8。 [表1] 成分 質量％ CaO 30.0 Si02 35.0 Mn〇2 30.0 Β2Ο3 5.0 14 201107496 [2] 試料 試料係如以下進行來製造。 氧化鋁原料係純度為99.5質量％以上的燒結品，尖晶石 係除了理論組成的燒結尖晶石之Al2〇3及MgO以外的不純 物為0·6質量％以下。氧化鋁粗的粒徑為0.5〜1.5mm，尖晶 石係將最高尺寸設為5mm，丘以與氧化鋁添加在一起時能 夠得到最密填充的方式來調節粒度配合。金屬A1係粒徑為 250〜74μηι且純度為99質量％以上’金屬Si係粒徑為149〜 74μπι且純度為96質量％以上，BK係粒徑為44μιη以下且純 度為95質量％以上，碳原料係鱗狀石墨且粒徑為5〇〇μηι以下 而且純度為95質量％以上。又，使用酌·樹脂作為黏合劑， 且添加量係另外添加4質量％。 將該等原料混煉使用單軸螺桿加壓機加壓成型且在 1000°C還原煅燒。隨後，進而使用瀝青浸潰來得到試料塊。 藉由將其濕式加工來得到以下說明之侵蝕試驗用供試物9。 隨後’將4支圓柱狀的供試物9固定在圓板狀治具8，並 使圓板的旋轉軸邊以25rpm旋轉，邊使供試物9在坩堝内的 熔鋼Μ及礦渣S浸潰1〇分鐘。而且，浸潰深度係將從供試物 9的下端至礦渣s的上面為4〇mm設作目標。1〇分鐘後，將供 試物9拉升並冷卻。冷卻後，測定供試物9的浸潰部分的圓 板的半徑方向之供試物尺寸D1，及切線方向的供試物尺寸 D2,並從各自原來的供試物9之同方向尺寸減去，取得平岣 值來算出熔損量(mm)。 [3] 尖晶石原料、氧化鋁原料的影響 201107496 製造固定為3質量％金屬A卜1質量％金屬Si、1質量％ 厌原料0·5吳1 Wc，並使尖晶石原料及氧化銘原料的比 率黉化來製造供試物9，且將各供試物9浸潰於坩堝7内，來 測疋各仏忒物9之1〇分鐘後的損耗量。實驗例丨〜實驗例1〇 之原料的構成係如表2所示。 Γ 矣？/1Mg(g)+Al203(g)+30(g)->MgO·Al203(s) · (2) In Patent Document 1 'by making the spinel on the surface of the sliding nozzle The layer forms 'to try to suppress the wetness> and the slag is wet to prevent melt loss. [PRIOR ART DOCUMENT] [Patent Document 1] JP-A-2002-29833A SUMMARY OF THE INVENTION PROBLEMS TO BE SOLVED BY THE INVENTION However, in the technique described in Patent Document 1, the spinel cannot be sufficiently formed. The dense layer of stone prevents the melt damage from being difficult. The present invention provides a continuous casting method and a method for continuously casting a steel which can reduce the melting loss of a molten steel supply nozzle when manufacturing a high-oxygen steel, a lead-free quick-cut steel, a high-strength steel, or the like. The refractory is used as a means for solving the problem. In order to solve the above problems, the present invention adopts the following configuration. (1) The first aspect of the present invention is a continuous casting method of steel, which is characterized in that 201107496 contains 0.15 mass% or more and 3.0 mass% or less of Μη, 0.005 mass% or more, and 0.06 mass% or less, and is limited to 0.01% by mass or less, 0.06% by mass or more, 0.08% by mass or less, C, 0.003% by mass or more, 0.04% by mass or less, or more than 0.006 mass% or more and 0.1 mass% or less. 0.004 mass% or more, 0.5 mass% or less of S, 0.0015 mass% or more, 0.02 mass% or less of N, 0.001 mass% or more, and 0.03 mass. /. The following B and the molten steel containing Fe and the remainder of the unavoidable impurities are held in the first container; and the molten steel is supplied to the second container through the sliding nozzle, and the sliding nozzle is contained in the above-mentioned 55% by mass or more. 4% by mass or less of the theoretical composition of the spinel raw material, 1% by mass or more, and 50% by mass or less of the alumina raw material, and 1 mass. /. 7% by mass or less of metal A1, 0.5% by mass or more, 2% by mass or less of metal Si, 0.5% by mass or more, and 4% by mass or less of carbon raw material, 0.1% by mass or more, and 1% by mass or less of B4C and inclusion A raw material of the remaining portion of the impurities to be avoided is added to the binder of 2% by mass or more and 6% by mass or less, and kneaded and molded. (2) The method of continuous casting of steel according to the above (1), wherein the alumina raw material may contain 90% by mass or more and 100% by mass or less, and the minimum particle diameter is 0.1 mm or more and the maximum particle diameter is 5 mm or less. Oxidized granules. (3) The continuous casting method of steel according to the above (1) or (2), wherein an upper nozzle is provided on an upper side of the sliding nozzle, and a lower nozzle is provided on a lower side of the sliding nozzle, the upper nozzle and the At least one of the lower nozzles may be obtained by adding a binder of 2% by mass or more and 6% by mass or less to the raw material, kneading and molding. (4) The continuous casting method of the steel according to the above (3), wherein the impregnation nozzle is further provided on the lower side of the nozzle of the 201107496, and the impregnation nozzle may be added to the raw material in an amount of 2% by mass or more. Between 6 mass% or less, a binder is obtained by kneading and molding. (5) The continuous casting method of steel according to the above (3), wherein a supply nozzle for supplying molten steel from the bucket to the tundish is further provided on a lower side of the nozzle, and the supply nozzle may be The raw material is added to a binder of 2% by mass or more and 6% by mass or less, and kneaded and molded. (6) The second aspect of the present invention is a refractory which is a refractory used in a continuous casting method using molten steel, and the molten steel contains 0.15 mass% or more and 3.0 mass% or less of Μη, 0.005 mass% or more and 0.06 mass% or less, ΑΙ, 0.01% by mass or less, 0.0006 mass% or more, 0.08 mass% or less of C, 0.003 mass% or more, 0.04 mass% or less of Si, and 0.006 mass% or more. 0.1% by mass or less of Ρ, 0.004% by mass or more, 0.5% by mass or less of S, 0.0015% by mass or more, 0.02% by mass or less of N, 0.001% by mass or more, and 0.03% by mass or less of B and Fe and not. The refractory is a spinel raw material having a theoretical composition of 45 mass% or more and 94 mass% or less, an alumina raw material of 1 mass% or more and 50 mass% or less, or 1 mass% or more, and the remaining portion of the impurities to be avoided. 7 mass% or less of metal A, 0.5% by mass or more, 2% by mass or less of metal Si, 0.5% by mass or more, and 4% by mass or less of carbon raw material, 0.1% by mass or more, and 1% by mass or less of B4C and Avoidable material remaining portion of the impurities, adding additional mass 2 ° / square or more and 6 mass% of the binder and kneading, to obtain a molding. (7) The refractory according to (6), wherein the alumina raw material may further contain 90 mass of 201107496. The oxidized crystal grain having a minimum particle diameter of not more than 100% by mass and not more than 100% by mass is 0. lmm or more and a maximum particle diameter of 5 mm or less. Advantageous Effects of Invention According to the present invention, continuous casting of steel by using a sliding nozzle or a refractory obtained by kneading and molding the above-mentioned raw material can reduce the inclusions in the molten steel, that is, MnO and B2〇3. The casting nozzle or refractory or the like is melted, and continuous casting can be performed stably. BRIEF DESCRIPTION OF THE DRAWINGS Fig. 1 is a schematic cross-sectional view showing the structure of a sliding nozzle used in a continuous casting method according to an embodiment of the present invention. Fig. 2 is a partially enlarged cross-sectional view showing the structure in the vicinity of the molten steel supply port of Fig. 1. Figure 3 is a schematic view for explaining the experimental method of the embodiment. Fig. 4 is a chart for explaining the effects of the embodiment. Fig. 5 is a chart for explaining the effects of the embodiment. Fig. 6 is a chart for explaining the effects of the embodiment. I: Embodiment 3 Embodiment for carrying out the invention - The present invention specifically prevents the sliding loss of the sliding nozzle or the fire resistant material by the following action. Hereinafter, the sliding nozzle will be described as an example of a refractory. Usually, the slag of the sliding nozzle is reacted on the surface of the sliding nozzle, and the slag component or the component after the reaction is wetted in the sliding nozzle, and the stomata state of the sliding nozzle of the speed is determined, and 201107496 is slid. The composition of the nozzle and the composition of the external slag. The slag produced by the aggregation of non-metallic inclusions generated in (4) steel in high-oxygen steel, error-free, fast-cut steel, high-quality, etc., contains the components of ^11〇 and b2〇3. Moreover, when these missing substances adhere to the surface of the sliding nozzle containing Al2〇3, Mg〇, Zr〇2#, brittle spots are generated, causing significant leakage of the sliding nozzle. Therefore, the inventors of the present invention have focused on the use of a sliding nozzle obtained by kneading and molding a raw material containing MgO.Al2〇3 (spinel) and Al2〇3 (Oxide). (1) Mg〇. The effect of solid solution and immobilization of MnO in the slag; and (7) the effect of adding Al2〇3 to the slag to enhance the viscosity. Further, the inventors of the present invention have found that by using such a sliding nozzle, since it is possible to suppress the surface of the sliding nozzle which is in contact with the molten steel from being wetted by the slag, it is possible to eliminate the melt loss increase component caused by BO3 in the slag. As a result, the melt loss of the sliding nozzle can be greatly reduced, and the stability of continuous casting can be achieved. Hereinafter, an embodiment of the present invention will be described based on the above knowledge. In the continuous casting method of steel according to an embodiment of the present invention, a raw material containing a theoretical composition of a spinel raw material, an alumina raw material, a metal A-metal Si, a mineral raw material, BW, and an unavoidable impurity is used, and 2 is additionally added. A sliding nozzle obtained by kneading and molding a binder having a mass % or more and a mass % or less. The raw material 'as an unavoidable impurity may contain less than 1% by mass of unavoidable impurities, but it is preferable not to contain it as much as possible. Here, the theoretical composition of the spinel material contains 24 masses. /. Above, 3〇 8 201107496% by mass or less of MgO, 70% by mass or more, and 76% by mass. In the case of the following A1203, and the unavoidable impurities are 1.5% by mass or less, for example, a fused spinel or a sintered spinel can be used as the spinel material. In addition, the alumina raw material may contain, for example, 95% by mass or more, preferably 98% by mass or more, of Al2〇3, and the unavoidable impurities may be less than 5% by mass, preferably less than 2% by mass. For example, fused alumina, sintered alumina or the like can be used as the alumina raw material. Further, in the raw material of the sliding nozzle as described above, the theoretical composition of the spinel material is 45 mass% or more and 94 mass%. The following range, and the alumina raw material is 1 mass % /. The above may be in the range of 50% by mass or less. Thereby, as described later, the melt resistance can be improved. In the raw material of the sliding nozzle, the metal A1 may be in a range of 1% by mass or more and 7% by mass or less. When the metal A1 is less than 1% by mass, the money, the oxidation resistance, and the strength tend to be low. Further, when the metal A1 is more than 7% by mass, the corrosion resistance and the peeling resistance tend to be low. Further, the content of the metal A1 is preferably 2% by mass or more and 6% by mass or less. In the raw material of the sliding nozzle, the metal Si may be in a range of 0.5% by mass or more and 5% by mass or less. When the metal Si is less than 0.5% by mass, corrosion resistance, oxidation resistance, and strength tend to be low. Further, when the amount is more than 2% by mass, the modulus of elasticity becomes high and the peeling resistance tends to be low. In the raw material of the sliding nozzle, the carbon raw material may be in a range of 5% by mass or more and 4% by mass or less. When the amount of the carbon raw material is less than 0.5% by mass, the peeling property tends to be low, and when it is more than 4% by mass, the oxidizing property tends to be low. Also, carbonaceous materials can use carbon black, graphite, and bidet. Further, the content of the 201107496 carbon raw material is preferably 0.5% by mass or more and 3.0% by mass or less. In the case of the raw material of the sliding nozzle, B4C may be in a range of 0.1% by mass or more and 1% by mass or less. When the B4C content is less than 0.1% by mass, the oxidation resistance tends to be low, and when it is more than 1% by mass, the silver property tends to be deteriorated. The above-mentioned sliding nozzle can be obtained by kneading and molding by adding 2% by mass or more and 6% by mass or less of a binder to the raw material of the above composition. Further, if necessary, the molded body may be dried in an environment of 150 ° C or more and 250 ° C or less after molding, and then fired at a temperature of 800 ° C or more and 1400 ° C or less in a non-oxidizing atmosphere. Further, it is also possible to perform immersion tar or asphalt treatment on the formed body. As the binder, an organic binder such as a phenol resin, an epoxy resin, a polyoxygen resin, or a pitch can be used. The sliding nozzle is attached to a molten steel supply port such as a bucket or a tundish to perform a continuous casting method of steel such as lead-free quick-cut steel. The continuous casting method in steel may be carried out in accordance with the previous casting conditions of the raw materials of the steel. Further, the aforementioned sliding nozzle can be attached to either the bucket or the molten steel supply port of the tundish. From the viewpoint of stability of continuous casting, the sliding nozzle is preferably mounted on both sides of the molten steel supply port of the washing and drowning tray. Further, the alumina raw material of the raw material may mainly contain alumina particles having a minimum particle diameter of 〇·1 mm or more, preferably 0.5 mm or more, and a maximum particle diameter of 5 mm or less, preferably 3 mm or less. When the minimum particle size of the oxidized crystal grain of the oxidized raw material is less than 〇·1 mm, the specific surface area of the oxidized material is increased, and the oxidized Ilu material is easily dissolved. 10 201107496 Sliding nozzle (4) Fire material) (4) The damage is large. On the other hand, when the maximum particle size of the oxidized M material is greater than 5, the specific surface area of the oxidized raw material is reduced and the oxidation (4) is changed to dissolve, resulting in a decrease in the supply of the _Al2〇3 component. _ The effect of sex is reduced. Therefore, the slag is not sufficiently suppressed from being wetted, and the melt loss of the sliding nozzle is increased. Further, "the oxidized raw material which mainly contains alumina particles having a minimum particle diameter of 0.1 mm or more and a maximum particle diameter of 5 mm or less" contains 9 Å by mass. /. The above, less than 1% by mass of the alumina raw material which can pass through the alumina particles of 5 mmI 帛 but cannot pass through the 〇.lmm sieve can be used. Here, the minimum particle diameter and the maximum particle diameter mean the minimum particle diameter and the maximum particle diameter of the oxidized crystal. In the present invention, as the refractory material using the above-mentioned raw material, not only the sliding nozzle but also the upper nozzle provided on the upper side of the sliding nozzle and the lower side nozzle may be formed. Further, an impregnation nozzle for pouring the molten steel from the sliding nozzle into the mold and a long nozzle (supplying nozzle) for pouring the molten steel from the bucket into the tundish may be formed on the lower side of the lower nozzle. On the inner faces of the nozzles, since the molten steel flows, although the degree of the sliding nozzle is not reached, the melting loss due to MnO and B2〇3 is still generated. Therefore, by forming the nozzles using the above-mentioned raw materials, it is possible to reduce such dissolution, and it is possible to achieve more stability in continuous casting. Hereinafter, a continuous casting method of steel according to an embodiment of the present invention will be described in more detail based on the drawings. Fig. 1 shows a mouthwash 1 of an embodiment of the present invention. The shampoo 1 is used to supply molten steel to a container of the tungsten mold 2. As shown in Fig. 2, which is a partially enlarged view of a portion surrounded by a circle in Fig. 1, the shroud disk 1 is provided at a molten steel supply port, and is provided on the upper side of the sliding nozzle 3 provided below the molten steel supply port 201107496. The upper nozzle 4 is provided, and the lower nozzle 5 is provided on the lower side of the sliding nozzle 3. An impregnation nozzle 6 is further provided on the lower side of the lower nozzle 5. The sliding nozzle 3, the upper nozzle 4, the lower nozzle 5, and the immersion nozzle 6 can be added to the following raw materials in an amount of 2% by mass or more and 6% by mass or less of the binder, and kneaded into a slab-like refractory. And if necessary, can be burned, or impregnated with bitumen or tar. As the raw material of the nozzles 3 to 6, for example, it is possible to suitably use a carbon raw material derived from graphite with respect to 74 6 mass% of spinel raw material, 19.9% by mass of oxidized raw material, "amount of metal A, 1 mass% of metal Si, and i mass% of graphite. 〇% by mass of B4C, 100% by mass, and 4% by mass of a phenol resin as a binder. Further, the sliding nozzle 3 may be calcined or impregnated, and the upper nozzle 4 and the lower nozzle 5 may be used. Calcination or impregnation, impregnation nozzles and long nozzles can also be calcined. In addition, metal tools can be installed as necessary. For continuous casting of steel, it is in the molten steel supply port of the bucket and the tundish, Go· The slide nozzle 3, the upper nozzle 4, the lower nozzle $, the immersion nozzle 6, and the long nozzle which are formed of the above-mentioned raw materials are contained, and Mn and 〇〇〇5 mass% or more of 0.15 mass% or more and 3.0 mass% or less are contained. 〇 质量 质量 以下 〇 〇 〇 〇 〇 〇 〇 〇 〇 〇 〇 〇 〇 〇 〇 〇 〇 〇 〇〇 〇〇 〇〇 〇〇 〇〇 〇〇 〇〇 〇〇 〇〇 〇〇 〇〇 〇〇 〇〇 〇〇 〇〇 〇〇 〇〇 〇〇 〇〇 〇〇 〇〇 〇〇 〇〇 〇 〇 〇 The following Si, 0.006 mass% or more, 〇·〗 The following P, 0.004% by mass or more, 〇.5 mass% or less of s, 〇〇〇15% by mass or more, 〇.〇2 mass. /. The following N'〇〇〇1% by mass or more, 〇〇3 mass % 12 201107496 The following B and the molten steel 包含 containing pe and the unavoidable impurities are supplied from the bucket to the tundish 1. Here, the composition of the molten steel is because the Μ is in the above range, the steel The strength is increased and MnS can be generated in the steel. Moreover, since the lanthanide is in the above range, the composition of the steel can be balanced. Since the A1 is limited to the above value, the oxygen level in the steel can be suppressed. Because the C system is in the above range. The strength of the steel can be increased. Since the Si is in the above range, the strength of the steel can be increased. Since P is in the above range, the embrittlement of the steel can be prevented. Since the S system is in the above range, MnS can be formed in the steel material. In the above range, it is possible to prevent embrittlement of the steel material. Since B is in the above range, the rapid cutting property of the steel can be improved. The molten steel which is supplied to the tundish 1 is in contact with the inner wall of the upper nozzle 4, and is slidably sprayed. The inner peripheral edge of the hole, the inner wall of the lower nozzle, and the inner wall ' of the impregnation nozzle 6 flow into the mold 2 from the discharge port formed at the lower end of the impregnation nozzle 6 (second capacity | §). The driving mechanism shown slides the opening plate of the hole on the lower side of the sliding nozzle 3 to adjust the amount of the molten steel shovel supplied to the mold 2. At this time, because of the hole portion of the sliding nozzle 3 and the nozzles 4 to 6, When the inner wall is exposed to the sliding nozzle of the molten steel Μ 'previous component, the damage caused by ΜηΟ and Β2〇3 in the molten steel is generated. In contrast, according to the present embodiment, the nozzles 3 to 6 are formed by using the above-mentioned raw materials. At the same time as the ground (4), the Μη(10) in the ore collapse is dissolved and fixed, and the added AW is dissolved into the expansion side to increase its viscosity, which can suppress the surface of the wetted nozzle which is in contact with the molten steel. It is enough to suppress the refining damage caused by IQ in the slag. 13 201107496 As a result, in the production of the lead-free quick-cut steel, the nozzles 3 to 6 can significantly reduce the melt loss and stabilize the continuous casting as compared with the nozzle manufactured using the conventional material. Further, in the above-described embodiment, the slide nozzle 3 adjusts the amount by which the molten steel crucible is supplied to the mold 2 by combining the two plate-opened plate-like members and sliding the lower plate member, but the present invention can also be used. A sliding nozzle formed by laminating three open plates is used. [Examples] Subsequently, examples of the invention are described, but the invention is not limited thereto. [1] Experimental method As shown in Fig. 3, a molten steel crucible containing a component of 6. lkg of error-free fast-cut steel was placed in a crucible 7 made of zirconium, and the temperature of the molten steel in the Ar environment was about 1550 ° C. The way, the induction heating is used to heat the molten steel crucible. In the molten steel crucible, 600 g of synthetic slag S as shown in Table 1 below was placed and the experimental conditions corresponding to continuous casting of lead-free quick-cut steel were set. The composition of the molten steel crucible is set to 1.2 mass% 1^11, 0.015 mass%0, and $0.002 mass °/. 8.1, 0.07 mass % C, 0.008 mass% 8 丨, 0.08 mass%?, 0.4 mass % S, 0.008 mass % N, 0.01 mass % 8. [Table 1] Component Mass % CaO 30.0 Si02 35.0 Mn〇2 30.0 Β2Ο3 5.0 14 201107496 [2] Sample The sample was produced as follows. The alumina raw material is a sintered product having a purity of 99.5% by mass or more, and the spinel is not more than 0.6% by mass of impurities other than Al2〇3 and MgO of the sintered spinel having a theoretical composition. The coarse alumina has a particle size of 0.5 to 1.5 mm, and the spinel has a maximum size of 5 mm. The mound can be adjusted to achieve the closest packing to the particle size when added with alumina. The metal A1 has a particle diameter of 250 to 74 μm and a purity of 99% by mass or more. The metal Si-based particle diameter is 149 to 74 μm and the purity is 96% by mass or more, and the BK-based particle diameter is 44 μm or less and the purity is 95% by mass or more. The raw material is scaly graphite and has a particle diameter of 5 μm or less and a purity of 95% by mass or more. Further, a resin was used as the binder, and the addition amount was 4% by mass. These raw materials were kneaded and molded by a uniaxial screw press and calcined at 1000 °C. Subsequently, asphalt impregnation was further used to obtain a test piece. The test article 9 for the erosion test described below was obtained by wet processing. Subsequently, 'four cylindrical test pieces 9 were fixed to the circular plate-shaped jig 8, and the rotating shaft side of the circular plate was rotated at 25 rpm, and the test object 9 was immersed in the molten steel crucible and the slag S in the crucible. Crush for 1 minute. Further, the depth of the impregnation is set to be 4 〇 mm from the lower end of the test object 9 to the upper side of the slag s. After 1 minute, the test article 9 was pulled up and cooled. After cooling, the sample size D1 in the radial direction of the disk portion of the impregnation portion of the test material 9 and the sample size D2 in the tangential direction were measured and subtracted from the same direction size of the original test object 9 The flat value is obtained to calculate the melt loss amount (mm). [3] Effect of spinel raw materials and alumina raw materials 201107496 Manufacturing fixed to 3 mass% metal A Bu 1 mass% metal Si, 1 mass% anaerobic raw material 0·5 Wu 1 Wc, and make spinel raw materials and oxidation The test material 9 was produced by deuterating the ratio of the raw materials, and each test material 9 was immersed in the crucible 7 to measure the amount of loss after each of the defects 9 for 1 minute. The composition of the raw materials of Experimental Example ~ Experimental Example 1 is shown in Table 2. Γ 矣? /1
貝驗例1〜實驗例10的結果係如第4圖所示。在此，熔 知才曰數係將實驗例⑽損耗量設為⑽，並將實驗例2〜實驗 例10的損耗里換算成相對值而成之值，炫丨員指數越大係表 示熔損越大。 從第4圖得矣口，在尖晶石原料添加氧化紹原料時’炫損 數降低亦即變為難以熔損。但是得知以實驗例5之氧化 16 201107496 鋁原料/尖晶石原料= 19.9/74.6為界限，熔損指數再次變高， 在實驗例9之氧化鋁原料/尖晶石原料=59.6/34.9，相較於實 驗例1，溶彳貝指數比只有由尖晶石原料所構成的貫驗例1大。 從以上能夠綠認相車父於只有由尖晶石原料所構成的貫 驗例1，藉由添加氧化鋁原料，能夠防止滑動喷嘴的熔損之 範圍係尖晶石原料為4 5質量％、9 4質量％以下且氧化鋁原料 為1質量％、50質量％以下。 [4]添加金屬A1之影響 對於固定為尖晶石原料/氧化鋁原料=3.75、1質量％金 屬Si、1質量％碳原料、0.5質量％B4C，並使金屬鋁的添加 量在〇質量％〜7.6質量％變化之實驗例11〜實驗例16，進行 與前述同樣的試驗。實驗例11〜實驗例16之原料的構成係 如下述表3所示，評價結果係如第5圖所示。 [表3] 實驗例 11 貫驗例 12 實驗例 13 實驗例 14 實驗例 15 貫驗例 16 氧化鋁原料 (質量％) 20.5 20.3 19.9 19.3 19.1 18.9 理論組成尖晶石原料（質量％) 77.0 76.2 74.6 72.4 71.7 71.0 原料 A1 (質量％) 0.0 1.0 3.0 5.8 6.7 7.6 構成 Si (質量％) 1.0 1.0 1.0 1.0 1.0 1.0 碳原料(含石墨） (質量％) 1.0 1.0 1.0 1.0 1.0 1.0 b4c (質量％) 0.5 0.5 0.5 0.5 0.5 0.5 黏合劑 紛樹脂 4 4 4 4 4 4 浸潰 有 有 有 有 有 有 金屬A1的添加係添加量為1質量％以上時能夠觀察到 效果，以3質量％左右為最佳，小於7質量％以下時，熔損指 數為小於100而能夠確認發揮熔損防止效果。 [5]添加碳原料之影響 17 201107496 θ田'士於固定為尖晶石原料/氧化鋁原料=3.75、3晰 置％金屬Α1、1質吾。/入 貝 金屬Sl、G.5ft%B4C，並使碳原料的 添加$在0.3質晋〇/ c Λ讲曰 1 _义里/(>〜5·0質量％變化之實驗例Π〜實驗例 的構成係如所*，評價結果係如第 [表4]The results of the test examples 1 to 10 are as shown in Fig. 4. Here, the value of the experimental example (10) loss is (10), and the loss of the experimental example 2 to the experimental example 10 is converted into a relative value, and the larger the blaze index is the melt loss. The bigger. When the raw material of the spinel material is added with the oxidation raw material, the reduction in the amount of glare is also difficult to melt. However, it was found that the melting loss index was again high by the oxidation of 16 201107496 aluminum raw material/spinel raw material = 19.9/74.6 of Experimental Example 5, and the alumina raw material/spinel raw material of Experimental Example 9 = 59.6/34.9, Compared to Experimental Example 1, the dissolved mussel index was larger than the one which was composed only of the spinel material. From the above-described green accommodating car father, in the case of the test case 1 composed only of the spinel material, by adding the alumina raw material, the range of the melt loss of the sliding nozzle can be prevented from being 45 mass% of the spinel material. 9% by mass or less and the alumina raw material is 1% by mass or less and 50% by mass or less. [4] The effect of adding metal A1 is fixed to spinel raw material/alumina raw material = 3.75, 1 mass% of metal Si, 1 mass% of carbon raw material, 0.5 mass% of B4C, and the amount of metal aluminum added is 〇 mass% From the experimental examples 11 to the experimental examples 16 which were changed to 7.6 mass%, the same test as described above was carried out. The composition of the raw materials of Experimental Example 11 to Experimental Example 16 is as shown in Table 3 below, and the evaluation results are shown in Fig. 5. [Table 3] Experimental Example 11 Test Example 12 Experimental Example 13 Experimental Example 14 Experimental Example 15 Test Example 16 Alumina raw material (% by mass) 20.5 20.3 19.9 19.3 19.1 18.9 Theoretical composition Spinel raw material (% by mass) 77.0 76.2 74.6 72.4 71.7 71.0 Raw material A1 (% by mass) 0.0 1.0 3.0 5.8 6.7 7.6 Composition Si (% by mass) 1.0 1.0 1.0 1.0 1.0 1.0 Carbon raw material (including graphite) (% by mass) 1.0 1.0 1.0 1.0 1.0 1.0 b4c (% by mass) 0.5 0.5 0.5 0.5 0.5 0.5 粘 4 4 4 4 4 4 4 4 4 4 4 4 4 4 4 4 4 4 4 4 4 4 4 4 4 4 4 4 4 4 4 4 4 4 4 4 4 4 4 4 4 4 4 4 4 4 4 4 4 4 4 4 4 4 4 4 4 4 4 4 4 4 4 4 4 4 4 4 4 4 4 4 4 4 4 4 4 4 4 4 4 4 4 4 4 4 4 4 4 4 4 4 4 When it is 7 mass% or less, the melt loss index is less than 100, and it can be confirmed that the melt loss prevention effect is exhibited. [5] Effect of adding carbon raw materials 17 201107496 θ田's fixed in spinel raw material / alumina raw material = 3.75, 3 clear % metal Α 1, 1 quality. /Into the shell metal Sl, G.5ft%B4C, and the addition of carbon material $ in 0.3 quality 〇 / c Λ 曰 1 _ Yi Li / (> ~ 5 · 0% by mass change of the experimental example 实验 ~ experiment The composition of the example is as follows, and the evaluation results are as shown in [Table 4].
碳原料的添加，係確認添加量為05質量％時能夠認定 進订”則述同樣的試驗。實驗例17〜實驗例23之原料 6圖所示。 其效果，以1質量％左右為最佳，至3質量％能夠認定其效 果，4質量％以下時熔損指數小於100 ,確認能夠發揮防止 炫才貝之效果。 從以上’能夠確認藉由將含有45.質量％以上、94質量％ 以下的理論組成之尖晶石原料、丄質量％以上、5〇質量％以 下的氧化鋁原料、1質量％以上、7質量％以下的金屬八卜0.5 質量％以上、2質量％以下的金屬Si、〇·5質量％以上、4質量 〇/〇以下的碳原料、0·1質量°/。以上、1質量％以下的B4C之原料 成形而製造的滑動喷嘴、上喷嘴、下喷嘴、浸潰喷嘴，並 且進行無鉛快削鋼的連續鑄造方法，能夠防止滑動喷嘴、 18 201107496 上喷嘴、下喷嘴、浸潰喷嘴的熔損並謀求鋼的連續鑄造之 安定化。 產業之可利用性 依照本發明，在製造高氧鋼、無鉛快削鋼、高錳鋼等 時，能夠降低喷嘴等的耐火物之熔損，而能夠安定地進行 連續鑄造。 I：圖式簡單説明3 第1圖係表示本發明的一實施形態之連續鑄造方法所 使用的滑動喷嘴的構造之模式剖面圖。 第2圖係表示在第1圖的熔鋼供給口附近的構造之部分 放大剖面圖。 第3圖係用以說明實施例之實驗方法之模式圖。 第4圖係用以說明實施例的效果之圖表。 第5圖係用以說明實施例的效果之圖表。 第6圖係用以說明實施例的效果之圖表。 【主要元件符號說明】 卜·洗口盤 7···坩堝 2…禱模 8···治具 3···滑動噴嘴 9···供試物 4…上喷嘴 Dl、D2···供試物尺寸 5···下喷嘴 Μ…熔鋼 6···浸潰噴嘴 S...礦渣 19The addition of the carbon raw material is the same as the case where it is confirmed that the addition amount is 05% by mass. The raw material of the experimental example 17 to the experimental example 23 is shown in Fig. 6. The effect is preferably about 1% by mass. When the mass loss is less than 100%, the melt loss index is less than 100, and it is confirmed that the effect can be reduced. From the above, it can be confirmed that it contains 45. mass% or more and 94 mass% or less. The theoretical composition of the spinel material, the cerium mass% or more, the cerium content of 5% by mass or less, the metal content of 1% by mass or more, 7% by mass or less, the metal arsenic 0.5% by mass or more, and 2% by mass or less of the metal Si,滑动·5 mass% or more, 4 mass 〇/〇 or less of the carbon raw material, 0.1 mass ° /. or more, 1 mass% or less of the B4C raw material is formed by the sliding nozzle, the upper nozzle, the lower nozzle, the impregnation nozzle In addition, the continuous casting method of lead-free quick-cutting steel can prevent the sliding of the nozzle, the nozzle on the 18 201107496, the lower nozzle, and the impregnation nozzle, and stabilize the continuous casting of the steel. According to the invention, in the production of high-oxygen steel, lead-free quick-cut steel, high-manganese steel, etc., it is possible to reduce the melting loss of the refractory such as a nozzle, and to perform continuous casting stably. I: Simple description of the drawing 3 Fig. 1 shows Fig. 2 is a schematic cross-sectional view showing the structure of a sliding nozzle used in the continuous casting method according to the embodiment of the present invention. Fig. 2 is a partially enlarged cross-sectional view showing the structure in the vicinity of the molten steel supply port of Fig. 1. The figure is a schematic diagram for explaining the experimental method of the embodiment. Fig. 4 is a diagram for explaining the effect of the embodiment. Fig. 5 is a diagram for explaining the effect of the embodiment. Fig. 6 is a diagram for explaining the effect of the embodiment. [Characteristics of main component symbols] Bu·washing disk 7···坩埚2...Prayer 8···Jig 3···Sliding nozzle 9···Test object 4...Upper nozzle Dl, D2· ··The size of the test object 5··· Lower nozzle Μ...Fused steel 6···Dipping nozzle S...Slag 19