A 6 B 6 經濟部中央標準局貝工消f合作社印製 五、發明説明i ) 〔産業上之利用領域〕 本發明僳鼷於一種為了製造延性鑄鐵的縳鐵鐵水之球 狀化處理方法及使用於該球狀化處理方法的鑄鐵鐵水之球 狀化處理用澆桶。 〔以往之技術〕 在球狀化處理鑄鐵鐵水並成為延性縳鐵時，以往使用 一般之澆桶或使用設有反應室的澆桶。 在製造延性鐮鐵時，為了使組鐵内之石墨形態從片狀 變化成球狀，在鐵水中添加或插入球狀化材料來進行球狀 化處理。 作為此球狀化處理法，有在澆桶中預先添加球狀材料 ，並在澆桶注入鐵水之置注方法，及在澆桶内之鐵水中插 入塊狀（糖果狀）之球狀化材料，來進行球狀化處理的糖 茱方法等。 在第17圖表示依以往之置注方法的球狀化處理方法 ,而在第18圖表示依以往之糖果方法的球狀化處理方法 〇 在表示於第17圖之以往之置注方法中，在澆桶本體 1内配設有用以抑制預先必要量之球狀化材料2及上述球 狀化材料2上所産生之反應用之蓋體材料8。 將熔解爐内之延性鑄鐵用鐵水4注入於澆桶本體1。 進行鐵水4之球狀化處理。 在表示於第18圖之以往之糖果方法中，在澆桶本饈 1將延性鑄鐵用鐵水4注入澆桶容量之例如6 0%左右， (請先閲讀背面之注意事項再填寫本頁) 裝- 線- 本紙張尺度逍用中國國家標準（CNS)甲4規格（210x297公；«) -3 - 經濟部中央標準局具工消费合作社印製 omb A 6 _B6_ 五、發明説明匕） 然後，將具有塊狀（糖杲）之球狀化材料2之糖果棒9的 防止鐵水飛散蓋髏8安裝於澆桶本體1上。之後，在其上 面，將塊狀之球狀化材料2插入上述鐵水4内，來進行鐵 水4之球狀化處理。 〔發明欲解決之缺點問題〕 在上述以往方法之延性鑄鐵用鐵水的球狀化處理方法 中，在球狀化材料之反應時産生激烈之閃光與多量之白煙 ，不但使工廠内之環境顯著地惡化，並形成公害産生源， 成為社會上的問題。 在球狀化材料之急激反應時，由於鐵水之飛散置現象 較激烈，因此，不但只能將承受鐵水澆桶容置之約60% 的鐵水施以球狀化處理，而且因鐵水飛散所産生之災害發 生之危險性較大，在安全上也成為問題。 作為解決這些問題點之方法，以往，在澆捅上部設置 堅固之蓋子，並將整傾澆桶形成作為密閉壓力容器，使之 球狀化處理之方法也被創作，惟作業性極差，且效果較差 ,因此尚未達到實用之階段。 本發明傜在於提供一種可大幅度解決延性鏞鐵用之鐵 水球狀化處理時之公害問題，工廠内之環境之惡化，及危 險作業及作業性（複雜，困難性）的鑄鐵鐵水之球狀化處 理方法及鑄鐵鐵水之球狀化處理用澆桶。 〔為要解決上述缺點問題所用之手段〕 (請先閱讀背面之注意事項再填寫本頁) 訂- 本紙張尺度逍用中國S家標準（CNS)甲4規格(210x297公澄） ·· 經濟部中央標準局員工消费合作社印製 Λ 6 B6 五.發明説明!今， 本發明之鑄鐵鐵水之球狀化處理方法，僳採用以下之 手段： (1) 在收容球狀化處理之澆桶本髏上部，安裝具有 連缠氣孔之多孔質體之蓋髏，並通過該多孔質體之蓋體將 鐵水注入澆桶本體内來進行球狀化處理者。 (2) 在收容球狀化材料之澆桶本體上部，安裝具有 連绩氣孔之多孔質體之一部分安裝切除之多孔質體之蓋體 ,並從該多孔質髅之蓋體之切除部分將鑄鐵鐵水注入澆桶 本體内來進行球狀化處理者。 又，本發明之锤鐵鐵水之球狀化處理澆桶，像採用以 下之手段： (3) 在收容球狀化處理材料之澆桶本體上部之全部 或一部分，配設具有連缠氣孔之多孔質體者·。 (4) 將澆桶本體内區分成承受鐵水部與收容球狀化 處理材料之球狀化處理部，並在上述球狀化處理部上方設 置具有連縝氣孔之多孔質體之蓋髏而成之蓋體者。 (5) 在上述（4)之本發明中，在區分承受鐵水部 與球狀化處理部之隔間壁使用具有連缠氣孔之多孔質體者 0 〔作用〕 在上述（1)之本發明中，縳鐵鐵水偽通過具有連缠 氣孔質體之蓋體而被注入澆桶本睦内。此時，多孔質體之 蓋體像防止熔滓混入澆桶本體内，並僅將鑄鐵鐵水注入該 本紙張尺度適用中國國家標準（CNS)甲4規格（210X297公釐） ~ 5 ' (請先閱讀背面之注意事項再瑱寫本頁) .襄- •線. 經濟部中央標準局員工消费合作社印製 Ι0ίϊ&3 Β6五、發明説明，4·; 澆桶内。 在澆桶本饈内，鑄鐵鐵水與球狀化材料相接觸而産生 化學反應，並産生急激且多董之白煙（以Mg 0為主成分 )與閃光，惟藉由具有連績氣孔之多孔質體之蓋體來捕捉 吸著白煙中之Mg 0等之微粒子，可大幅度抑制白煙放散 至大氣中。 又，藉具有連續氣孔之多孔質鼸之蓋體，隨著薄鐵鐵 水與球狀化材料之間的反應在澆桶本體内所産生之氣髏被 放出至大氣中，使澆桶本體内之壓力降低，因此可防止鑲 鐵鐵水之飛散量，又使縳鐵鐵水飛散之危險成為幾乎没有 0 由於上述（2)之本發明，係由安裝多孔質體之蓋體 之切除部分將鑄鐵鐵水注入澆桶本體内，因~此其注入可容 易且迅速地進行。安裝具有連鑛氣孔之多孔質體之蓋饅， 僳對澆桶本饈内之縳鐵鐵水與球狀化材料之間的反應所産 生之白煙之捕捉吸著與降低承受鐵水澆桶内之氣體壓力， 具有與上述（1)之本發明同樣之作用。 在上述（3)之本發明中，藉由具有設1龄盪桶本體 上部之連缠氣孔之多孔質體，捕捉在球狀化處理時所産生 之白煙的微粒子，抑制白煙放散至外部，同時將産生氣體 放出至外部來降低澆桶本體内之氣體壓力。 因此，可防止澆桶本饈内之鐵水之飛散量，可將澆桶 本體成為小型化。又，與因多孔質髏所産生之遮蔽作用相 輔相成而防止鐵水向外部飛散，可提高安金性。 本紙張尺度適用中國國家標準（CNS)甲4規格（210x297公釐）—6 - {請先閱讀背面之注意事項再填寫本百) *装. •訂· 經濟部中央標準局貝工消f合作杜印製 A 6 _B_6_ 五、發明説明5 :) 又，鐵水偽通過具有連缠氣孔之多孔質體之後注入澆 桶本讎内，因此可防止熔洋混入澆桶内。 在上述（4)之本發明中，藉由將澆桶本臛内區分成 承受鐵水部與球狀化處理部，且在球狀化處理部上部設置 具有連鑛氣孔之多孔質體而成之蓋體。因此，與上述（3 )之本發明同樣，捕捉在球狀化處理部之球狀化處理時所 産生之白煙之粒子，抑制白煙放散至外部，同時將産生氣 體放出至外部來降低澆桶本體内之氣體鼷力，且也可防止 鐵水之飛散。 又，藉由將澆桶本鼸内區分成承受鐵水部與球狀化處 理部，因此，可將鐵水容易地注入澆桶本體。 在上述（5)之本發明中，除了上述（4)之本發明 之作用之外，邇有藉由將承受鐵水與球狀化處理部之間的 隔間壁形成連鑛氣孔之多孔質體，因此可以防止在球狀化 處理時在球狀化處理部所産生之白煙向外部飛散。更提高 降低産生氣髏之氣體壓力及防止鐵水之飛散的諸作用。 〔實施例〕 參照第1圖及第2圖將本發明之第1實施例加以說明 〇 在澆桶本體1内配置必需量之球狀化材料2 (視需要 ，在同一球狀化材料2上也可以配置蓋體材料）於所定之 位置後，而在澆桶本體1之上部全面安裝具有連缠氣孔之 多孔質體之蓋體3 (例如，具有三次元網目構造之通氣性 (請先閱讀背面之注意事項再填寫本頁) 太缺强R磅iA +因K宏燸迆（(^5)肀4採格（210x297公货） 一 7一 ;'0i 似 A 6 B6 經濟部中央標準局员工消費合作社印製 五、發明説明（g、 的耐熱濾層） 在本實施例中，將澆桶本體1配置於熔解爐10附近 ，並將熔解爐10内之延性鑄鐵用鐵水4注入具有連縯氣 孔之多孔質體3上，使該鐵水4通過多孔質醍之蓋駸3並 注入澆桶本體1内。 在澆桶本龌1内，所注入之延性縳鐵用鐵水4舆球狀 化材料2相接解，並進行化學反應，而産生急激且多量之 白煙及閃光。 具有上述之連鑛氣孔之多孔質體之蓋«3,係當延性 鑄鐵鐵水4注入於澆桶本體1時，可防止混入熔滓，同時 捕捉吸著産生球狀化處理時之白煙中之Mg Ο等微粒子， 並大幅度抑制白煙放散至大氣。 又，具有連缠氣孔之多孔質體之蓋體3,由於具有通 氣性，可將澆桶本體1内之産生氣體容易放出至大氣中， 故顯著降低澆桶本體1内之氣體壓力，而與多孔質體之蓋 體3所産生之遮蔽相輔相成，可使鐵水飛散之危險成為幾 乎没有，同時可防止鐵水産生飛散量，並可在澆桶本饈1 内注入多量之鐵水。 在本實施例中，作為具有連缠氣孔之多孔質體之蓋體‘ 3,使用具有三次元網目構造之陶瓷多孔質體（碩化矽質 :視比重0. 35〜0. 55，夸JL率8 0—〜9 〇 % ,槽 (cell)數6値/25mm 口）作為耐熱濾層，施以 F C D4 ◦ 0之縳鐵鐵水5 0 k g之球狀化處理的結果， 可以將白煙之産生量抑制在以往方法之約1/10左右， (請先閲讀背面之注意事項再填寫本頁) 裝· 訂 線- 本紙張尺度逍用中國國家標準（CNS)甲4規格（210x297公货) -8 - 經濟部中央標準局員工消費合作社印製 LOivbJ A 6 _B6___ 五、發明説明（y ) 又，可以將反應時之鐵水完全沒有飛散。 參照第3圖及第4圔將本發明之第2實施例加以說明 Ο 澆桶本體1傜藉由在從該澆桶本髏1之上部延至下部 ，並從其底面至上方隔著間隔具有下端的耐火物製之上部 隔間壁6,而區劃成反應部1 a與承受鐵水口 5。在上述 反應部1 a設有從底面豎起之下部隔間壁7而在其下部形 成反應室1 b,又，安裝有覆蓋反應部1 a之上部且具有 連續氣孔之多孔質體之蓋鼸3 (例如具有三次元網目構造 之耐熱性的濾層）。上述承受鐵水口 5,傈如圖示，具有 容易承受鐵水之形狀，該承受鐵水口5偽向側方擴大且向 上方開放使上部之横剖面形狀形成V字狀。 在上述反應室lb内配置球狀化材料2 (視必要也可 在該球狀化材料2上配置蓋體材料）。 在本實施例中，熔解爐10内之延性鑄鐵用鐵水4從 上述承受鐵水口5上方之所開放部分注入，而該鐵水偽在 承受鐵水口 5内降下而被注入反應部1 a内。此時，如上 述，承受鐵水口5僳形成從熔解爐10容易承受鐵水之形 狀，因此容易進行注入鐵水。 藉由延性鑄鐵用鐵水4與球狀化材料2在反應室1b 内相接觸，産生閃光與白煙。所産生之白煙，像AM具A 通氣性之連壤氣默之多孔S體笔蓋麗放散裏方寒中。此 時，白煙中之Mg Ο等之徹粒子偽幾乎被具有連缠氣孔之 多孔質體之蓋體3所捕捉吸著，因此可顯著地抑制白煙之 (請先閲讀背面之注意事項再填寫本頁) 訂 線- 本紙張尺度逍用中國國家標準（CNS)甲4規格（210x297公茇） -9 - A6 B6 經濟部中央標準局員工消費合作社印製 五、發明説明k ) 産生，同時，藉上述反應所産生之反應部lb内之産生氣 饈也通遇具有連鑲氣孔之多孔質之蓋腰3 ,可降低反應部 lb内之氣鼸壓力，因此可防止鐵水之飛散舆防止鐵水産 生飛散量。 又，藉由上述上部隔間壁6，可抑制球狀化處理時之 反應氣體從反應部1 a流進承受鐵水口 5側。 參照第5圖及第6麵將本發明之第3實施例加以說明 Ο 如圖所示，本實施例之澆桶本龌1,係為了使熔解爐 1 0内之延性鑄鐵用鐵水4容易注入與使鐵水容易鏵入鑄 楔。因此，使承受鐵水部5較宽大，且將澆桶本體1之形 狀形成横型鼓式者，而澆桶本龌1之形狀以外像具有與上 述第2實施例同樣之構造。 ~ 在本實施例中，也與上述第2實施例同樣地，具有抑 制白煙、防止鐵水飛散、防止鐵水産生飛散量及容易操作 等之效果，同時，藉由較大之承受鐵水部5,可將延性鑄 鐵用鐵水4容易注入澆桶本體1與容易進行鑄入縳模之鑄 入作業。 參照第7圖及第8圖將本發明之第4實施例加以說明 0 本實施例係將第3圖及第4圖所示之上述第2實施例 之上部隔間壁6以具有連缠氣孔之多孔質體（例如具有三 次元網目構造之通氣性之耐熱濾層）所構成。 本實施例像可發揮上述第2實施例所具有之作用與效 (請先閲讀背面之注意事項再填寫本頁) 本紙張尺度通用中國Η家標準(CNS)甲4規格(210x297公;¢) -10 - 經濟部中央標準局貝工消費合作社印製 LOi似 A 6 _B_6 五、發明説明& ) 果，同時，藉由具有連缠氣孔之多孔質體製之上部隔間壁 ，可更降低澆桶本體1内空間之氣饈壓力。 在本實施例中，作為多孔質腥之蓋餹3及上部隔間壁 6，使用具有三次元網目構造之陶瓷多孔質（凝聚劑與氣 化鋁之混合物，視比重0. 35〜0. 60,空孔率80 〜90%,槽數13傾/25mm口），實施FCD 400之鐵水500kg之球狀化處理之結果，可以將白 煙幾乎抑制向大氣放出，或可防止鐵水之飛散。 又，在上述之各實施例中，作為具有連绩氣孔之多孔 質饈，可使用具有碩化矽質、凝聚劑與氧化鋁之混合物等 之三次元網目構造之陶瓷多孔質匾等。 參照第9圖至第11圖將本發明之第5實施例加以説 明。 ' 本實施例傺設有覆蓋上述第3實施例之澆桶本體1之 反應部la的金屬製蓋匾13,並在該蓋體13之開口 13a (除滓口）内埋充具有由小塊焦煤12而成之連鑲 氣孔之多孔質體1 6。 在此多孔質體，使用表示於第1表之小塊焦煤體、實 施F C D 4 0 0之鐵水5 0 ◦ k g之球狀化處理的結果， 與上述各實施例同樣，可以將球狀化處理時之白煙幾乎抑 制向大氣放出，或也可以防止鐵水之飛散。 本紙張尺度边用中國8家標準（CNS)甲4規格(210x297公着) (請先閲讀背面之注意事項再填寫本頁} 裝. 訂· 線· -11 - A 6 B6 第1表 基 材 粘結剤，硬化則 小塊焦煤 ①水玻瑰+Fe-S i 粒度：5 m/m〜 ②一代磷酸鋁 1 5 m / m +電融M g微粉 性 視比重；0. 585〜0. 633g/mi 狀 空孔率； 4 7 〜5 3 % (請先閲讀背面之注意事項再填寫本頁) 裝. 訂 線. 經濟部中央標準局員工消費合作社印製 又，在連缠氣孔之多孔質體，適用姪石、真珠石、輕 石等之小塊時，也可得到大略同樣之成果。 參照第12圖將本發明之第6實施例加以說明。 本實施例；使用將不銹銷製金屬網2 3 (網目開口： 0. 75m/m及1. 50m/m) 8〜10張，以各種 組合重叠成層後，在表面塗佈耐火材料（例如，氧化鋁粉 末+喬治亞高嶺土+PVA溶液、鋳物用塗型材料等）之 具有連續氣孔之多孔質體26,代替上述第5實施例之具 有連缠氣孔之多孔質體。 在本實施例中，也可以得到抑制白煙及防止鐵水飛散 本紙張尺度逍用中國國家標準（CNS)甲4規格(210X297公;¢) —12 - 經濟部中央標準局员工消費合作社印製 A6 __ 五、發明説明（^ ) 之效果。 參照第13圃將本發明之第7實施例加以說明。 本實施例，係作為具有連鑛氣孔之多孔質《3 6,使 用混合陶瓷球釀與纖維質糸耐熱材料之細片（例如玻璃絲 、矽絲），並將調製成空孔率50〜90%之無粘結耐熱 材料密封於不綉銷製金屬網箱33 (網目開口 ：0. 75 m/m),代替上述第5實施例之具有連缠氣孔之多孔質 體。 在本實施例中，也可以得到與上述第5、第6實施例 同樣之抑制白煙及防止鐵水飛散之效果。 參照第14圖至第16圖將本發明之第8實施例加以 說明。 本實施例偽將在上述第3實施例之多孔質蓋體與澆桶 本體之承受鐵水部變更如下述者。 亦即，在與上述第5至第7實施例同樣之金屬製蓋體 1 3之開口 1 3 a填充具有連續氣孔之陶瓷多孔質體46 (硪化矽質，視比重0. 35〜0. 55,空孔率50〜 90%,槽數20個/25mm口）。 又，為了使澆桶本饈1容易承受鐵水，設有箱型之承 受鐵水部45，且在該承受鐵水部45之下部配設濾氣層 40,俥防止混入不純物及防止白煙之放出。 在本實施例中，實施FCD500之鐵水700kg 之球狀化處理之結果，抑制白煙放出至大氣之效果及防止 鐵水之飛散效果很顯著，而且也大幅度提高鎂之産品。且 (請先閲讀背面之注意事項再填窝本頁) 裝- 訂_ 線* 本紙張尺度边用中國國家橾準（CNS)甲4規格(210x297公*) -13 - loi似 A 6 B 6 經濟部中央標準局員工消費合作社印製 五、發明説明《2 ) 鐵水溫度之降低也比以往法小，因此也可提高品質。 〔發明之效果〕 在申請專利範圍第1項及第2項所述之本發明，由於 在進行鑄鐵鐵水之球狀化處理之澆桶本體安裝具有連缠氣 孔之多孔質體之蓋體，因此可發揮如下之效果。 (1) 可以大幅度抑制在鑄鐵鐵水與球狀化材料之反 應時所産生之白煙向大氣中的放出董，故有效地提高環境 及公害對策。 (2) 可以減輕在縳鐵鐵水與球狀化材料之反應時的 承受鐵水澆榧内之氣體壓力，藉由激減鐵水之飛散，因此 可以提高安全性。 (3) 由於減少鐵水飛散量（bufflin'g)，因此可使 澆桶本體成為小型者。 (4) 與以往之備有上部蓋體之澆桶相比較，在本發 明可以使澆桶成為輕量化者，且操作性也良好。 除了以上事項以外，在申請專利範園第1項所述之本 發明中，由於禱鐵鐵水通過多孔質體之蓋體，然後注入澆 桶本體内，因此不會混入熔滓，而可提高所製造之延性鏵 鐵之品質。 又，在申請專利範圍第2項所述之本發明中，由於從 多孔質體之蓋體之切除部分將鑄鐵鐵水注入澆桶本體，因 此可在短時間内注入該鐵水，且可容易進行。 在申請專利範圍第3項所述之本發明中，由於在進行 火《.張 R 中因 甲4規.格（210x297公修） ^ ^ -14 - (請先閱讀背面之注意事項再填寫本頁) 經濟部中央標準局員工消费合作社印製 A6 _B6 五、發明説明i3 :) 縳鐵鐵水之球狀化處理的澆桶本餹上部之全部或一部分配 設具有連鑲氣孔之多孔質饈，因此可發揮如下之效果。 (1/)可以大幅度抑制在鐵水與球狀化材料之反應 時所産生之白煙向大氣中的放出量，故有效地提高環境及 公害對策。 (2/)可以減輕在鑄鐵鐵水與球狀化材料之反應時 的澆桶本饈内之氣體壓力，藉由與多孔質體所産生之遮蔽 效果相輔相成激減鐵水之飛散，因此可以提高安全性。 (3/)由於減少鐵水飛散量，因此可使澆桶本饑成 為小型者。 (4/)與以往之備有上部蓋體之承受鐵水澆桶相比 較，可以使澆桶本體成為輕量化者，且操作性也良好。 (5/)由於可以將鐵水通過多孔質體之蓋體並注入 於澆桶本體内，因此不會混入熔滓，而可提高所製造之延 性鑄鐵之品質。 在申請專利範圍第4項所述之本發明中，由於可將澆 桶本體内區分成承受鐵水部與球狀化處理部，而在球狀化 處理部上方設置具有連缠氣孔之多孔質體而成之蓋體，因 此，與申讅專利範圍第3項所述之發明同樣地可發揮上述 (1 /)至（4 / )之效果，同時，可將鐵水容易注入澆 桶本體而提高作業性。 * 在申請專利範圍第5項所述之本發明中，由於將申請 專利範圍第4項所述之本發明的承受鐵水部與球狀化處理 部之隔間壁以具有連缠氣孔之多孔質體，因此除了在申請 (請先閲讀背面之注意事項再填寫本頁) 裝- 訂- 線. -15 - 經濟部中央標準局员工消t合作社印製 A6 _B_6 五、發明説明ί4 ) 專利範圍第4項所述之本發明之上述效果之外，更可以提 高降低在承受鐵水部内之空間的氣髖壓力，並防止白煙放 散至外部及防止鐵水之飛散的效果。 〔圃式之簡單說明〕 第1團僳表示本發明之第1實施例的縱剖面圆， ή. — “ 痛-汗μ -I. I jaw, ii ·<·τ^ιη ί « ； ,»»a>My»·,/.. .·· ：>·.- 第2圖僳表示該實施例的平面圖， 第3圖僳表示本發明之第2實施例的縱剖面圖， 第4圖偽表示該實施例的平面圖， 第5圔像表示本發明之第3實施例的縱剖面圔， 第6圖像表示該實施例的平面圖， 第7圖像表示本發明之第4實施例的縱剖面圖， 第8圖係表示該實施例的平面圖， · 第9圖傜表示本發明之第5實施例的~斜視圖， 第10圖像表示該實施例之澆桶的縱剖面圔， 第11圖傜表示該實施例之主要部分的縱剖面圖， 第12圖及第13圔像分別表示本發明之第6及第7 實施例之主要部分的縱剖面圖， 第14圖倦表示本發明之第8實施例的斜視圖， 第15圖僳表示該實施例的平面圔， 第16圖偽表示該實施例的縱剖面圖， 第17圖及第18圖僳表示分別由於以往之置注方法 及糖果方法所産生之薄鐵鐵水之球狀化處理方法的剖面圓 (請先閲讀背面之注意事項再填寫本頁) 裝< 訂 線. 太板後κ泞ifi m中因IS它找m (CNS) Ψ 4規柊m 0 乂 297公修） _ 16 — A6 ______ 五、發明説明) 在圖中： 1為澆桶本髏，2為球狀化材料，3為具有連續氣孔 之多孔質體蓋體，4為延性鑄鐵用鐵水，5為承受鐵水口 ,6為上部隔間壁，7為下部隔間壁，8為防止鐵水分散 蓋體，9為糖果棒，10為熔解嫌，12為小塊焦煤，1 3為蓋覼13a為開口，16、26、36、46為具有 連缠氣孔之多孔質體，23為金屬網，33為金屬網箱， 40為濾氣層，45為承受鐵水口。 (請先閲讀背面之注意事項再填寫本頁) 裝- 訂' 線. 經濟部中央標準局員工消費合作社印製 -17 -A 6 B 6 Printed by Beigongxiao F Cooperative of Central Bureau of Standards of the Ministry of Economy V. Description of Invention i) [Industry Utilization Field] The present invention is based on a method for spheroidizing molten iron for the production of ductile cast iron And a spheroidizing ladle for cast iron molten iron used in the spheroidizing treatment method. [Conventional Technology] When spheroidizing molten iron into ductile iron, a conventional ladle or a ladle equipped with a reaction chamber has been used in the past. In the manufacture of ductile sickle iron, in order to change the graphite form in the group iron from flake to sphere, a spheroidizing material is added or inserted into the molten iron to perform spheroidizing treatment. As this spheroidization treatment method, there is a method of adding a spherical material to the ladle in advance, and pouring molten iron into the ladle, and inserting a spheroidal (candy-like) spheroidization into the molten iron in the ladle Materials, the method of spheroidization, etc. FIG. 17 shows the spheroidization processing method according to the conventional injection method, and FIG. 18 shows the spheroidization processing method according to the conventional candy method. In the conventional injection method shown in FIG. 17, The ladle body 1 is provided with a cover material 8 for suppressing a predetermined amount of the spheroidizing material 2 and the reaction generated on the spheroidizing material 2. The ductile cast iron in the melting furnace is poured into the ladle body 1 with molten iron 4. Spheroidization of molten iron 4 is performed. In the conventional confectionery method shown in Fig. 18, ductile cast iron 1 is poured into the ladle capacity 1 such as about 60% of the ladle capacity (please read the precautions on the back before filling this page)装-线-This paper scale uses the Chinese National Standard (CNS) A 4 specifications (210x297 g; «) -3-Omb A 6 _B6_ printed by the Gonggong Consumer Cooperative of the Central Standards Bureau of the Ministry of Economy The cap 8 for preventing the molten iron from scattering from the candy bar 9 having the spheroidized material 2 in the shape of a lump (sugar) is mounted on the ladle body 1. Thereafter, on the upper surface, the spheroidizing material 2 in the form of a block is inserted into the molten iron 4 to perform the spheroidizing treatment of the molten iron 4. [Disadvantages to be solved by the invention] In the above-mentioned conventional method of spheroidizing treatment of molten iron for ductile cast iron, intense flash and a large amount of white smoke are generated during the reaction of the spheroidizing material, which not only causes the environment in the factory Significantly deteriorated and formed a source of pollution, which became a social problem. During the rapid reaction of the spheroidized material, due to the fierce dispersion of molten iron, not only can the molten iron that bears about 60% of the molten iron contained in the molten steel be spheroidized, but also due to iron Disasters caused by water scattering are more dangerous, and also become a problem in terms of safety. As a method to solve these problems, in the past, a strong lid was placed on the upper part of the pour, and a tilting pail was formed as a closed pressure vessel, and a method of spheroidization was also created, but the workability was extremely poor, and The effect is poor, so it has not yet reached the practical stage. The present invention is to provide a cast iron molten iron ball that can greatly solve the pollution problem of the molten iron spheroidizing process for ductile ytterbium iron, the deterioration of the environment in the factory, and the dangerous operation and workability (complexity, difficulty) Forming treatment method and ladle for cast iron molten iron spheroidizing treatment. [Methods used to solve the above-mentioned shortcomings] (Please read the precautions on the back before filling in this page) Order-This paper standard uses the Chinese S Family Standard (CNS) A4 specification (210x297 Gongcheng) ·· Ministry of Economic Affairs Printed Λ 6 B6 by the Employees ’Cooperative of the Central Bureau of Standards 5. Description of the invention! Today, the spheroidizing treatment method of the cast iron molten iron of the present invention adopts the following methods: (1) In the spheroidizing container containing the spheroidizing treatment On the upper part of the skull, a cover body with a porous body with intertwined pores is installed, and molten iron is poured into the body of the ladle through the cover body of the porous body for spheroidization treatment. (2) On the upper part of the ladle body containing the spheroidized material, install a part of the porous body with continuous pores, install the cover of the cut porous body, and cast iron from the cut part of the cover of the porous skull The molten iron is injected into the body of the ladle to be spheroidized. In addition, the spheroidizing ladle of the hammer iron molten iron of the present invention adopts the following methods: (3) All or a part of the upper part of the ladle body containing the spheroidizing material is provided with continuous air holes Porous body. (4) Divide the body of the ladle into a spheroidizing treatment part that receives the molten iron part and a spheroidizing treatment material, and above the spheroidizing treatment part, a cap with a porous body with continuous pores is provided. Those who are covered. (5) In the invention of the above (4), a porous body having intertwined pores is used in the partition wall that separates the molten iron portion from the spheroidizing treatment portion 0 [Function] In the above (1) In the invention, the iron-bonding molten iron is injected into the ladle Benmu through a lid body having entangled stomatal bodies. At this time, the cover image of the porous body prevents the melt from mixing into the ladle body, and only injects the cast iron molten iron into this paper. The standard of the paper is China National Standard (CNS) Grade 4 (210X297mm) ~ 5 '(please Read the precautions on the back before writing this page). Xiang- • Line. Printed by the Consumer Cooperative of the Central Standards Bureau of the Ministry of Economy Ι0ίϊ & 3 Β6 V. Invention description, 4 ·; in the pouring bucket. In the ladle, the molten iron of the cast iron is in contact with the spheroidized material to produce a chemical reaction, and produce a violent and voluminous white smoke (with Mg 0 as the main component) and a flash of light. The cover of the porous body captures the particles such as Mg 0 in the white smoke, which can greatly suppress the white smoke from being released into the atmosphere. In addition, with the cover of the porous mannequin with continuous pores, the gas skeleton generated in the body of the ladle is released into the atmosphere with the reaction between the thin molten iron and the spheroidized material, so that the body of the ladle The pressure is reduced, so that the amount of iron molten iron can be prevented from scattering, and the risk of iron molten iron scattering becomes almost zero. Because of the invention of (2) above, the cut part of the cover body installed with the porous body will The cast iron molten iron is injected into the body of the ladle, so its injection can be carried out easily and quickly. Install a cover bun with a porous body with ore pores. Suddenly absorb and reduce the white smoke generated by the reaction between the molten iron in the pot and the spheroidizing material. The internal gas pressure has the same effect as the invention of (1) above. In the invention of the above (3), the porous body having continuous pores provided on the upper part of the body of the 1-year-old swing barrel captures the fine particles of white smoke generated during the spheroidization process, and suppresses the white smoke from escaping to the outside At the same time, the generated gas is released to the outside to reduce the gas pressure in the ladle body. Therefore, the amount of molten iron in the ladle can be prevented from scattering, and the ladle body can be miniaturized. In addition, it complements the shielding effect caused by the porous skeleton to prevent the molten iron from scattering to the outside, which can improve the safety of the gold. The size of this paper is in accordance with Chinese National Standard (CNS) Grade 4 (210x297 mm) —6-{Please read the notes on the back before filling in this one hundred) * Package. Du Yin made A 6 _B_6_ V. Description of the invention 5 :) In addition, the molten iron is injected into the ladle of the ladle after passing through the porous body with continuous pores, so it can prevent the molten ocean from mixing into the ladle. In the invention of the above (4), it is formed by dividing the inner part of the ladle into a molten iron portion and a spheroidizing treatment portion, and providing a porous body with ore gas pores on the upper portion of the spheroidizing treatment portion The cover. Therefore, similar to the invention of (3) above, the particles of white smoke generated during the spheroidization treatment of the spheroidization treatment part are captured to suppress the white smoke from being radiated to the outside, and the generated gas is discharged to the outside to reduce the pouring The gas force inside the barrel body can also prevent the molten iron from flying away. In addition, by dividing the inside of the ladle body into the molten iron portion and the spheroidizing treatment portion, molten iron can be easily poured into the ladle body. In the invention of the above (5), in addition to the function of the invention of the above (4), there is a porous body in which the ore gas pores are formed by the partition wall between the molten iron and the spheroidizing treatment part Therefore, it is possible to prevent the white smoke generated in the spheroidizing part from being scattered outside during the spheroidizing process. Further improve the effects of reducing the gas pressure of the gas skeleton and preventing the molten iron from scattering. [Embodiment] The first embodiment of the present invention will be described with reference to FIG. 1 and FIG. 2. A necessary amount of spheroidizing material 2 is arranged in the ladle body 1 (if necessary, on the same spheroidizing material 2 It is also possible to arrange the cover material) at a predetermined position, and then install a cover 3 with a porous body with intertwined pores on the upper part of the ladle body 1 (for example, with the air permeability of the three-dimensional mesh structure (please read first Note on the back and then fill out this page) Too short of strong R lbs iA + due to K Hongsui ((^ 5) Yu 4 Caige (210x297 public goods) one 7 one; '0i like A 6 B6 Central Standards Bureau of the Ministry of Economic Affairs Printed by Employee Consumer Cooperative V. Description of the invention (g, heat-resistant filter layer) In this embodiment, the ladle body 1 is arranged near the melting furnace 10, and the ductile cast iron in the melting furnace 10 is injected with molten iron 4 having On the porous body 3 that continuously performs pores, the molten iron 4 is passed through the lid 3 of the porous yam and injected into the ladle body 1. In the ladle body 1, the injected molten iron for ductile binding 4 The spheroidized material 2 is connected and undergoes a chemical reaction, which produces a sudden and large amount of white smoke and flash. The cover of the porous body with the ore pores mentioned above «3, when ductile iron molten iron 4 is injected into the ladle body 1, can prevent mixing into the melt, and at the same time capture the white smoke when spheroidizing treatment is absorbed Mg Ο and other fine particles, and greatly suppress the emission of white smoke to the atmosphere. In addition, the cover body 3 of the porous body with continuous pores can easily release the gas generated in the ladle body 1 to the atmosphere due to its breathability In this way, the gas pressure in the ladle body 1 is significantly reduced, and the shielding generated by the cover 3 of the porous body complements each other, so that the risk of molten iron scattering becomes almost zero, and at the same time, the amount of molten iron is prevented from being scattered, and A large amount of molten iron can be injected into the ladle 1 in this embodiment. In this embodiment, as the cover body of the porous body having intertwined pores, a ceramic porous body (master silicon) with a three-dimensional mesh structure is used Quality: depending on the specific gravity of 0.35 ~ 0.55, boasting a JL rate of 8 0 ~~ 9 〇%, the number of cells (6) / 25mm port) as a heat-resistant filter layer, applied with FC D4 ◦ 0 bound molten iron The result of the 50 kg spheroidization treatment can suppress the amount of white smoke produced The method is about 1/10, (please read the precautions on the back before filling in this page) Binding · Threading-This paper standard uses the Chinese National Standard (CNS) A 4 specifications (210x297 public goods) -8-Ministry of Economic Affairs LOivbJ A 6 _B6___ printed by the Staff Consumer Cooperative of the Central Bureau of Standards 5. Description of the invention (y) In addition, the molten iron during the reaction can not be scattered at all. The second embodiment of the present invention will be described with reference to FIGS. 3 and 4 Ο The ladle body 1 is divided into a reaction part 1 a by a refractory upper partition wall 6 made of a refractory having a lower end extending from the upper part to the lower part of the ladle skeleton 1 and having a lower end separated from the bottom to the upper side With bear iron nozzle 5. The reaction part 1 a is provided with a lower partition wall 7 standing up from the bottom surface to form a reaction chamber 1 b at the lower part, and a cover body covering a porous body with continuous pores covering the upper part of the reaction part 1 a is installed 3 (for example, a heat-resistant filter layer with a three-dimensional mesh structure). As shown in the figure, the receiving molten iron port 5 has a shape that easily receives molten iron. The receiving molten metal port 5 is enlarged laterally and opened upward to form a V-shaped cross-sectional shape of the upper part. A spheroidizing material 2 is arranged in the reaction chamber 1b (a cover material may be arranged on the spheroidizing material 2 if necessary). In this embodiment, the ductile iron 4 in the melting furnace 10 is injected from the open portion above the receiving molten iron port 5, and the molten iron is lowered in the receiving molten iron port 5 and injected into the reaction section 1 a . At this time, as described above, the molten iron receiving port 5 is shaped to easily withstand molten iron from the melting furnace 10, so that molten iron injection is easy. The molten iron 4 for ductile cast iron and the spheroidizing material 2 are brought into contact in the reaction chamber 1b to generate flash and white smoke. The white smoke produced, like the porous S body pen Gaili of AM's air-permeable continuum, diffused into the cold of Lifang. At this time, the Mg Ο and other through particles in the white smoke are almost caught by the cover 3 of the porous body with intertwined pores, so the white smoke can be significantly suppressed (please read the notes on the back first (Fill in this page) Threading-This paper scale is produced in accordance with Chinese National Standard (CNS) Grade 4 (210x297 gong) -9-A6 B6 Printed by the Employee Consumer Cooperative of the Central Bureau of Standards of the Ministry of Economy V. Invention Instructions k), and at the same time , The gaseous conjugate generated in the reaction part lb generated by the above reaction also meets the porous cap waist 3 with continuous air holes, which can reduce the pressure of the gaseous spine in the reaction part lb, thus preventing the molten iron from scattering and preventing The molten iron generates flying amount. In addition, the upper partition wall 6 can suppress the reaction gas from flowing into the molten iron inlet 5 side of the reaction section 1 a during the spheroidizing process. The third embodiment of the present invention will be described with reference to FIGS. 5 and 6. As shown in the figure, the ladle 1 of this embodiment is designed to make molten iron 4 for ductile cast iron in the melting furnace 10 easy Inject and make molten iron easy to cast into the wedge. Therefore, the receiving molten iron portion 5 is wider and the shape of the ladle body 1 is formed into a horizontal drum type, and the shape of the ladle body 1 is the same as that of the second embodiment described above. ~ In this embodiment, as in the second embodiment described above, it has the effects of suppressing white smoke, preventing the molten iron from scattering, preventing the molten iron from generating a flying amount, and being easy to operate, etc. In section 5, molten iron 4 for ductile cast iron can be easily poured into the ladle body 1 and casting operation for casting into a mold is easy. The fourth embodiment of the present invention will be described with reference to FIGS. 7 and 8. 0 This embodiment uses the upper partition wall 6 of the second embodiment shown in FIGS. 3 and 4 to have continuous air holes The porous body (for example, a three-dimensional mesh structure with a breathable heat-resistant filter layer). This embodiment can play the role and effect of the above second embodiment (please read the precautions on the back and then fill out this page). This paper standard is universal Chinese Standard (CNS) Grade 4 (210x297); ¢ -10-The LOi-like A 6 _B_6 printed by the Beigong Consumer Cooperative of the Central Bureau of Standards of the Ministry of Economy V. Invention description &) At the same time, the upper partition wall can be further reduced by the porous system with porous pores The discouragement pressure of the space inside the barrel body 1. 60 In this embodiment, as the porous fishy cover 3 and the upper compartment wall 6, a ceramic porous structure having a three-dimensional mesh structure (a mixture of coagulant and vaporized aluminum, depending on the specific gravity of 0. 35 ~ 0. 60 , The porosity is 80 ~ 90%, the number of grooves is 13 inclination / 25mm mouth), the result of the spheroidizing treatment of 500kg of molten metal of FCD 400 can almost suppress the emission of white smoke to the atmosphere, or can prevent the molten iron from scattering . In each of the above-mentioned embodiments, as the porous porous material having continuous pores, a ceramic porous plaque having a three-dimensional mesh structure such as a master silica, a coagulant, and a mixture of alumina can be used. The fifth embodiment of the present invention will be described with reference to FIGS. 9 to 11. 'In this embodiment, a metal cover plaque 13 covering the reaction portion la of the ladle body 1 of the third embodiment described above is provided, and a small block is embedded in the opening 13a (except the yoke) of the cover body 13 Porous body made of coking coal 12 with continuous pores 16. In this porous body, the small-sized coking coal body shown in Table 1 was used, and the results of the spheroidizing treatment of FCD 4 0 0 molten iron 5 0 ◦ kg were used. As in the above embodiments, spheroidizing was possible The white smoke during treatment almost suppresses the emission to the atmosphere, or can also prevent the molten iron from scattering. This paper uses 8 Chinese Standards (CNS) Grade A specifications (210x297) (please read the precautions on the back before filling out this page). Binding. Thread · -11-A 6 B6 Table 1 substrate Bonding, hardening is a small piece of coking coal ① water glass rose + Fe-S i particle size: 5 m / m ~ ② first generation aluminum phosphate 1 5 m / m + electric melting M g micronized apparent specific gravity; 0. 585 ~ 0. 633g / mi-shaped porosity; 4 7 ~ 5 3% (please read the precautions on the back before filling in this page) Packing. Threading. Printed by the Consumer Cooperative of the Central Standards Bureau of the Ministry of Economic Affairs. The plastid, when applied to small pieces such as nepheline, pearl stone, pumice, etc., can obtain roughly the same result. The sixth embodiment of the present invention will be described with reference to FIG. 12. This embodiment; Metal mesh 2 3 (mesh opening: 0.75m / m and 1.50m / m) 8 ~ 10 sheets, layered in various combinations, and coated with refractory materials on the surface (for example, alumina powder + Georgia kaolin + PVA) Solution, coating material for the object, etc.) porous body 26 with continuous pores instead of the continuous pores of the fifth embodiment Porous body. In this embodiment, white smoke can be suppressed and the molten iron can be prevented from scattering. This paper can be used freely. The Chinese National Standard (CNS) A 4 specifications (210X297 g; ¢) — 12-Employees of the Central Bureau of Standards of the Ministry of Economic Affairs A6 printed by the consumer cooperative. 5. The effect of the description of the invention (^). The seventh embodiment of the present invention will be described with reference to the 13th garden. This embodiment is used as a porous "3 6 with mixed ore pores. Fine pieces of ceramic balls and fibrous refractory materials (such as glass filaments and silicon filaments), and seal the unbonded heat-resistant material with a porosity of 50 ~ 90% to the metal cage 33 (mesh opening) : 0.75 m / m), instead of the porous body with intertwined pores of the above-mentioned fifth embodiment. In this embodiment, the same white smoke suppression and prevention as the above-mentioned fifth and sixth embodiments can also be obtained The effect of molten iron scattering. The eighth embodiment of the present invention will be described with reference to FIGS. 14 to 16. This embodiment assumes that the porous lid body of the third embodiment and the molten iron receiving portion of the ladle body The changes are as follows. That is, in line with the above 5 to 7 The openings 1 3 a of the same metal lid body 1 3 as in the embodiment are filled with a ceramic porous body 46 having continuous pores (a crystalline silica, depending on the specific gravity of 0.35 ~ 0.55, porosity 50 ~ 90%, groove 20 / 25mm ports). In order to make the ladle 1 easy to withstand molten iron, a box-shaped receiving molten iron part 45 is provided, and a gas filter layer 40 is arranged below the receiving molten iron part 45. In order to prevent the mixing of impurities and the release of white smoke. In this embodiment, as a result of the spheroidizing treatment of 700kg of molten iron of FCD500, the effect of suppressing the emission of white smoke to the atmosphere and the effect of preventing the scattering of molten iron are very significant, and Also greatly improve the products of magnesium. And (please read the precautions on the back before filling the nest page) Binding-Order _ Line * This paper uses the Chinese National Standard (CNS) A 4 specifications (210x297 g *) -13-loi like A 6 B 6 Printed by the Employee Consumer Cooperative of the Central Bureau of Standards of the Ministry of Economic Affairs V. Description of Invention "2) The temperature reduction of molten iron is also smaller than the previous method, so the quality can also be improved. [Effects of the invention] In the invention described in items 1 and 2 of the patent application scope, since the lid body of the ladle body subjected to the spheroidization treatment of cast iron molten iron is provided with a porous body having continuous pores, Therefore, the following effects can be exerted. (1) The white smoke generated during the reaction between the cast iron molten iron and the spheroidized material can be greatly suppressed from emitting to the atmosphere, so the environment and pollution measures can be effectively improved. (2) The pressure of the gas in the molten iron can be reduced during the reaction between the molten iron and the spheroidizing material. By drastically reducing the scattering of the molten iron, the safety can be improved. (3) Since the amount of molten iron (bufflin'g) is reduced, the ladle body can be made smaller. (4) Compared with the conventional ladle equipped with an upper cover, the ladle can be made lighter in the present invention, and the operability is also good. In addition to the above matters, in the invention described in item 1 of the patent application garden, since the molten iron passes through the cover of the porous body and is then poured into the body of the ladle, it will not be mixed with melt, but can be improved The quality of the ductile iron manufactured. In addition, in the invention described in item 2 of the patent application range, since the cast iron molten iron is injected into the ladle body from the cut-out portion of the lid of the porous body, the molten iron can be injected in a short time and can be easily get on. In the invention described in item 3 of the patent application scope, due to the fire ". Zhang R in the first 4 rules. Grid (210x297 public repair) ^ ^ -14-(please read the precautions on the back before filling in this Page) A6 _B6 printed by the Employees ’Consumer Cooperative of the Central Bureau of Standards of the Ministry of Economic Affairs 5. Description of the invention i3 :) All or part of the upper part of the ladle of the spheroidizing process for binding the molten iron is equipped with a porous dish with continuous air holes Therefore, the following effects can be exerted. (1 /) The amount of white smoke generated when the molten iron reacts with the spheroidized material can be greatly suppressed into the atmosphere, so the environment and pollution measures can be effectively improved. (2 /) It can reduce the gas pressure in the ladle process when the cast iron molten iron reacts with the spheroidizing material. By complementing the shielding effect produced by the porous body, it can reduce the scattering of molten iron, so it can improve safety. Sex. (3 /) Since the amount of molten iron flying is reduced, the bucket can be made small. (4 /) Compared with the conventional molten iron ladle equipped with an upper cover, the ladle body can be made lighter, and the operability is also good. (5 /) Since molten iron can be passed through the cover of the porous body and injected into the body of the ladle, it will not be mixed with melt, and the quality of the ductile cast iron produced can be improved. In the invention described in item 4 of the patent application range, since the ladle body can be divided into a molten iron portion and a spheroidizing treatment portion, a porous body with continuous pores is provided above the spheroidizing treatment portion The cover is formed by the body, so it can exert the above-mentioned effects (1 /) to (4 /), and at the same time, it can easily inject molten iron into the ladle body like the invention described in item 3 of the patent scope. Improve workability. * In the invention described in item 5 of the patent application scope, the partition wall of the invention described in item 4 of the patent application scope that receives the molten iron portion and the spheroidizing treatment portion is porous with continuous pores Plasma, so in addition to the application (please read the precautions on the back and then fill out this page) Binding-Order-Line. -15-A6 _B_6 printed by the Cooperative Society of the Central Standards Bureau of the Ministry of Economic Affairs 5. Invention Description ί4) Patent Scope In addition to the above-mentioned effects of the present invention described in item 4, the effects of reducing the air hip pressure in the space in the molten iron receiving portion, preventing the white smoke from being radiated to the outside, and preventing the molten iron from scattering. [Simple description of the garden style] The first group represents the longitudinal cross-section circle of the first embodiment of the present invention, ".-" 痛-汗 μ -I.I jaw, ii · < · τ ^ ιη ί «;, »» A > My »·, / ..... ： ≫ · .- Figure 2 shows a plan view of this embodiment, Figure 3 shows a longitudinal sectional view of the second embodiment of the present invention, 4th The figure shows a plan view of the embodiment, the fifth image shows a longitudinal section of the third embodiment of the present invention, the sixth image shows a plan view of the embodiment, and the seventh image shows the fourth embodiment of the present invention. Longitudinal cross-sectional view, Figure 8 is a plan view of this embodiment, Figure 9 is a perspective view of a fifth embodiment of the present invention ~ perspective view, the tenth image shows a longitudinal section of the ladle of this embodiment, 11 Figure 傜 shows a longitudinal section of the main part of the embodiment, Figures 12 and 13 show the longitudinal section of the main part of the sixth and seventh embodiments of the present invention, Figure 14 shows the present invention Fig. 15 is a perspective view of the eighth embodiment, Fig. 15 is a plan view of the embodiment, Fig. 16 is a pseudo cross-sectional view of the embodiment, and Figs. 17 and 18 are Represents the cross-section circle of the spheroidization treatment method of thin molten iron produced by the previous injection method and candy method respectively (please read the precautions on the back before filling in this page). Install &Line; after the board κ択 ifi m because of IS it finds m (CNS) Ψ 4 gauge 柊 m 0 佂 297 public repair) _ 16 — A6 ______ V. Description of the invention) In the picture: 1 is the pouring bucket, 2 is the spherical material , 3 is a porous body cover with continuous pores, 4 is molten iron for ductile cast iron, 5 is a molten iron receiving port, 6 is an upper compartment wall, 7 is a lower compartment wall, and 8 is a cover for preventing molten iron from dispersing, 9 is a candy bar, 10 is a melting point, 12 is a small piece of coking coal, 13 is a lid 13a is an opening, 16, 26, 36 and 46 are porous bodies with continuous pores, 23 is a metal mesh and 33 is a metal Net cage, 40 is the air filter layer, 45 is to bear the molten iron port. (Please read the notes on the back before filling in this page) Installation-Order 'line. Printed by the Employees Consumer Cooperative of the Central Bureau of Standards of the Ministry of Economic Affairs-17-