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1. 发明专利

JPH06328206A CONTINUOUS CASTING METHOD 失效
公开(公告)号：JPH06328206A
公开(公告)日：1994-11-29
申请号：JP12006493
申请日：1993-05-21
申请人： NIPPON STEEL CORP , MITSUBISHI HEAVY IND LTD
发明人： MIYOSHINO YASUHITO , MISUMI HIDEYUKI , KASAMA AKIO , ISHIKAWA ATSUSHI , KANAI NORIYUKI , YONEDA JUNKICHI
IPC分类号： B22D11/06
摘要： PURPOSE:To improve the productivity and to improve the quality of a product by using a twin belt continuous caster having a specific length of a mold. CONSTITUTION:As a means for preventing molten metal surface oscillating phenomenon generated at the time of casting at the high speed having >=2mpm in the twin belt type continuous caster, the mold length in the twin belt continuous caster is used by satisfying the inequality. In this mold, the necessary solidified shell thickness for remaining no bulging is made to be already formed at the mold part, and the constitution, in which the rugged drawing is not generated at support roll part, is formed. In the inequality, L: mold length (m), Vc: casting velocity (mpm), l: pitch of the support roll (m), Q: average sheet heat quantity in the mold (kcal/m h), delta: elastic limit bulging quantity (m). By this method, the obstacle of the operation and the generation of quality deterioration caused by the molten metal surface oscillating phenomenon can be prevented.

2. 发明专利

JPH07284885A METHOD FOR COMPLETING CASTING IN BELT TYPE CONTINUOUS CASTING EQUIPMENT 失效
公开(公告)号：JPH07284885A
公开(公告)日：1995-10-31
申请号：JP10160294
申请日：1994-04-15
申请人： MITSUBISHI HEAVY IND LTD , NIPPON STEEL CORP
发明人： YONEDA JUNKICHI , ONIZUKA YUKIO , HATTORI HIDENORI , UEHARA MASAJI , ISHIKAWA ATSUSHI , NAKAMURA SHIYUUJI
IPC分类号： B22D11/10 , B22D11/06
摘要： PURPOSE:To prevent such troubles as to break a machine, device, etc., and to be impossible to draw out a cast slab caused by the leakage of unsolidified molten metal in the inside of the cast slab at the time of passing the cast slab through a mold part, in a casting method with belt type continuous casting equipment. CONSTITUTION:At the time of completing the continuous casting, a signal of the completion of the casting is inputted to a nozzle opening degree control part 14. The nozzle opening degree control part 14 closes a flow rate adjusting nozzle 6 to stop the pouring of the molten metal 10a and also, this close signal is immediately transmitted to a casting velocity control part and rotating velocity of the belts 1 and the upper and the lower pinch rolls 9a, 9b is lowered to decelerate the casting velocity. As a result, the thickness of a solidified shell 10b in the mold part 3 is increased and also, the descent of the molten metal surface 10c and the lowering of static pressure of the molten metal 10a are made slow to prevent the leakage of the molten metal from the upper part of the cast slab 10.

3. 发明公开

EP1215288A4 LADLE REFINING DEVICE AND LADLE REFINING METHOD USING IT 有权
标题翻译： DEVICE煎炸炼油和方法使用此设备
公开(公告)号：EP1215288A4
公开(公告)日：2005-05-18
申请号：EP00925650
申请日：2000-05-12
申请人： NIPPON STEEL CORP
发明人： KIMURA HIDEAKI , ISHIKAWA ATSUSHI , ISHII HIROMI , ARAI MASAYUKI , AOKI JUN
IPC分类号： B22D1/00 , C21C7/10 , F27D3/16
CPC分类号： C21C7/10 , F27D2003/161
摘要： A ladle refining device for restricting in-tank metal deposition and for efficiently agitating molten steel, refining slag and degassing; and a ladle refining method using it. A device for refining molten steel by directly connecting for communication a vacuum/depressurized tank (2) to the upper part of a ladle (1) and by blowing an agitation gas (6) consisting of an inert gas into the ladle, wherein an inner diameter of a vacuum/depressurized tank trunk is set to be up to that of the upper end of the ladle and to be at least a projected section diameter (D) of a swelled portion (7) of the molten steel surface caused by the agitation gas (6) blown into the ladle.

4. 发明专利

DE60040342D1 未知
公开(公告)号：DE60040342D1
公开(公告)日：2008-11-06
申请号：DE60040342
申请日：2000-05-12
申请人： NIPPON STEEL CORP
发明人： KIMURA HIDEAKI , ISHIKAWA ATSUSHI , ISHII HIROMI , ARAI MASAYUKI , AOKI JUN
IPC分类号： B22D1/00 , C21C7/10 , F27D3/16
摘要： The present invention provides a ladle refining apparatus capable of suppressing skull deposition in a vacuum/decompression chamber and performing molten steel agitation, slag reforming and degassing efficiently, and a ladle refining method using the apparatus. In an apparatus for refining molten steel by directly coupling a vacuum/decompression chamber 2 to the top of a ladle 1 and blowing inert gas 6 for agitation into the ladle, the inner diameter of the shaft of the vacuum/decompression chamber is not larger than the inner diameter of the top end of the ladle but not smaller than the projected diameter D of the bulging portion 7 of the molten steel surface formed by the agitation gas 6 blown into the ladle.

5. 发明专利

ES2312339T3 DISPOSITIVO DE REFINO EN CUCHARA DE COLADA, Y USO DE LA CUCHARA DE COLADA DE COLADA EN UN METODO DE REFINO. 未知
公开(公告)号：ES2312339T3
公开(公告)日：2009-03-01
申请号：ES00925650
申请日：2000-05-12
申请人： NIPPON STEEL CORP
发明人： KIMURA HIDEAKI , ISHIKAWA ATSUSHI , ISHII HIROMI , ARAI MASAYUKI , AOKI JUN
IPC分类号： F27D3/16 , B22D1/00 , C21C7/10
摘要： Un aparato de refino al vacío/en descompresión para refinar acero fundido en una cuchara de colada, mediante acoplar directamente una cámara de vacío/descompresión que no tiene su extremo inferior un tubo de inmersión para ser sumergido en el acero fundido de la cuchara de colada, hasta la parte superior de la cuchara de colada, y reducir la presión interna de la cámara, y mediante agitar el acero fundido en la cuchara de colada, a través de la inyección de gas inerte en la cuchara de colada, caracterizado porque la parte superior de la cuchara de colada está fuertemente acoplada con la cámara de vacío/descompresión para formar una estructura hermética; la cámara de vacío/descomposición tiene una parte de eje; y el diámetro interno de la mencionada parte de eje es menor que el diámetro interno del extremo superior en la cuchara de colada, pero no menor que el diámetro proyectado de la parte abultada de la superficie del acero fundido en la cuchara de colada, formada mediante el gas de agitación inyectado en la cuchara de colada; el extremo inferior de la cámara de vacío/descompresión está provisto con un apéndice cilíndrico; el mencionado apéndice cilíndrico tiene un diámetro interno igual o mayor que el diámetro proyectado de la parte abultada del acero fundido en la cuchara de colada, y un diámetro externo igual o menor que el diámetro interno del extremo superior de la cuchara de colada; un extremo inferior del apéndice cilíndrico se extiende por debajo del extremo superior de la cuchara de colada, pero no está sumergido en el acero fundido en la cuchara de colada; y la altura desde la superficie del acero fundido en la cuchara de colada, hasta la parte superior de la cámara de vacío/descompresión, es de 5 m o más.

6. 发明专利

BR0012413A 未知
公开(公告)号：BR0012413A
公开(公告)日：2002-04-02
申请号：BR0012413
申请日：2000-05-12
申请人： NIPPON STEEL CORP
发明人： KIMURA HIDEAKI , ISHIKAWA ATSUSHI , ISHII HIROMI , ARAI HASAYURI , AOKI JUN
IPC分类号： B22D1/00 , C21C7/10 , F27D3/16

7. 发明专利

JPH08117927A METHOD FOR DECIDING SURFACE QUALITY OF SLAB FOR BELT TYPE CONTINUOUS CASTING MACHINE 失效
公开(公告)号：JPH08117927A
公开(公告)日：1996-05-14
申请号：JP28610094
申请日：1994-10-27
申请人： NIPPON STEEL CORP
发明人： ISHIKAWA ATSUSHI , KASHIO SHIGEKI
IPC分类号： G01N21/89 , B22D11/06 , G01N21/892
摘要： PURPOSE: To make it possible to observe and record the surface characteristics of a slab right after the completion of casting by observing the transfer of the surface characteristic patterns of the slab in the same patterns on belt surfaces at the time when the slab detaches from the belts. CONSTITUTION: The surface patterns of the slab held thus far in contact with the surfaces of the belt 6 constituting casting molds of a belt type continuous casting device are transferred to these belt surfaces when the slab parts from the belts 6. Television cameras 4 are installed between driving pulleys 2 and tension pulleys 3 to observe the belt 6. The surfaces of the belts 6 right under the casting molds, i.e., right after the belts 6 part from the slab are visually observed by utilizing the lightness difference in the resulted images or are processed by a personal computer 10 with online data, by which flaws, etc., are recognized.

8. 发明专利

JPH0825004A COATING MATERIAL FOR MOLD OF MOVABLE MOLD CONTINUOUS CASTING 失效
公开(公告)号：JPH0825004A
公开(公告)日：1996-01-30
申请号：JP17977894
申请日：1994-07-08
申请人： NIPPON STEEL CORP , NIPPON STEEL METAL PROD
发明人： KASHIO SHIGEKI , ISHIKAWA ATSUSHI , YAMAMOTO TOSHIKI , WAKAO MASAMITSU , KAJITANI TOSHIYUKI , MINAGAWA YASUO
IPC分类号： B22D11/07 , B22D11/04 , B22D11/059 , B22D11/06
摘要： PURPOSE:To produce a good thin cast slab by surely absorbing the inclusion floated to meniscus part and evenly coating the surface of metal belt. CONSTITUTION:As for a coating material for the mold surface of a movable mold continuous casting machine to cast molten metal, the coating material in slurry state, in which the melting temp. is 600-1500 deg.C and the material having a composition consisting of, by weight, 5-50% SiO2, 0.5-15% Al2O3, 10-40% CaO, 0.5-15% MgO, 0.5-10% Li2O, 3-30% F is added with water and binder, is obtained.

9. 发明专利

JPH0825002A PRODUCTION OF THIN CAST SLAB BY BELT CONTINUOUS CASTING 失效
公开(公告)号：JPH0825002A
公开(公告)日：1996-01-30
申请号：JP15728294
申请日：1994-07-08
申请人： NIPPON STEEL CORP
发明人： WAKAO MASAMITSU , KAJITANI TOSHIYUKI , KASHIO SHIGEKI , ISHIKAWA ATSUSHI , YAMAMOTO TOSHIKI
IPC分类号： B22D11/00 , B22D11/04 , B22D11/059 , B22D11/06
摘要： PURPOSE:To produce the thin cast slab having reduced crack defect in the belt continuous casting method. CONSTITUTION:In the production method of thin cast slab by supplying a molten steel having >=0.08% to =2 layers, a melting point of the top surface layer coating material is =60mum and the cooling index R at the position of 0.2-0.7mm depth from the surface layer of cast slab as defined in the prescribed equation R=(d/191) , where, d: mean value of dendrite secondary arm space (mm) is >=60 to

10. 发明专利

JPH07100595A METHOD FOR CONTINUOUSLY CASTING THIN CAST SLAB 失效
公开(公告)号：JPH07100595A
公开(公告)日：1995-04-18
申请号：JP24692193
申请日：1993-10-01
申请人： NIPPON STEEL CORP
发明人： KANAI NORIYUKI , KOMORI TOSHIYA , ISHIKAWA ATSUSHI , ONO TAKEMASA , HORIOKA SATOSHI
IPC分类号： B22D11/10 , B22D11/06 , B22D11/103
摘要： PURPOSE:To uniformize the solidified shell and to prevent the surface defect in a thin cast slab by dipping a turnover flow preventing plate into gap between a flat nozzle and a mold wall surface. CONSTITUTION:Molten steel 2 in a tundish 1 is controlled by sliding nozzle devices 3 and poured from nozzles 4 for supplying the molten steel. The turnover flow preventing plates 7 are dipped into the position near a meniscus 5 between respective short sides 8 and nozzles 4 for supplying the molten steel. This dipping depth is set so as to satisfy a prescribed condition by a positional adjusting device 6 of the turnover flow preventing plate 7. The turnover flow preventing plate 7 may be made of a material having refractoriness to molten steel, e.g. a refractory brick material or a ceramic is desirable. By this method, the turnover of a spouting flow in the mold is restrained and the shell at

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