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1. 发明专利

JPH0227591B2 失效
公开(公告)号：JPH0227591B2
公开(公告)日：1990-06-18
申请号：JP28279185
申请日：1985-12-18
申请人： NIPPON STEEL CORP
发明人： SAKAMOTO HIROSHI , ISHII AKIO , IZUMI NOBORU
IPC分类号： F27D1/16 , C21C5/46 , C21C7/10

2. 发明专利

JPS62142988A HOT REPAIR METHOD OF SMELTING VESSEL 失效
公开(公告)号：JPS62142988A
公开(公告)日：1987-06-26
申请号：JP28279185
申请日：1985-12-18
申请人： NIPPON STEEL CORP
发明人： SAKAMOTO HIROSHI , ISHII AKIO , IZUMI NOBORU
IPC分类号： F27D1/16 , C21C5/46 , C21C7/10

3. 发明专利

JP2001316721A WALKING HEARTH TYPE HEATING FURNACE 失效
公开(公告)号：JP2001316721A
公开(公告)日：2001-11-16
申请号：JP2000133273
申请日：2000-05-02
申请人： NIPPON STEEL CORP
发明人： ADACHI KOUJI , TANABE KOJI , YOKOYAMA YUKIO , KOOKA SATOYUKI , SAKAMOTO HIROSHI , IZUMI NOBORU , TANAKA TSUTOMU , SASANUMA HIDEKI
IPC分类号： C21D1/00
摘要： PROBLEM TO BE SOLVED: To suppress a trouble such as rolling-over and to prevent the flaw caused by contact with a furnace hearth when a long-sized rolling stock such as a steel billet is heated. SOLUTION: In this furnace, the inner part of the furnace is divided into two parts in a carrying direction of the material to be rolled. The furnace hearth at the inlet side part is pealed up at the center part in the furnace width direction of a part at the outlet side of the carrying direction with skids, and the furnace hearth at the outlet side part is pealed up over the whole length in the carrying direction and over whole parts in the furnace width direction with rail-like skids. It is desirable that the peal-up height at the inlet side part is regulated to 0.2-3 times of the thickness of the material to be heated and the skid width is regulated to 5-60% of the furnace width and the raise-up height at the outlet side part is regulated to 0.2-2 times of the thickness of the material to be heated. Thus, the occurrence ratio of the rolling- over of the billet can be suppressed to

4. 发明专利

JPH06185871A METHOD FOR CAST WORKING OF UNSHAPED REFRACTORIES 失效
公开(公告)号：JPH06185871A
公开(公告)日：1994-07-08
申请号：JP35244892
申请日：1992-12-11
申请人： NIPPON STEEL CORP
发明人： SAITO MASAO , IZUMI NOBORU , WATABE NAOKI , YOSHIHARA SEIJI
IPC分类号： C04B35/66 , B22D41/02 , F27D1/16 , C04B35/68
摘要： PURPOSE:To prevent a bulk increased portion from being deformed by a method wherein the periphery of initial worked bulk increased portion is hardened within a time for keeping an adhering characteristic at an interface with a lower part of the bulk increased portion and then the working is carried out after a period in which the hardened portion is not varied by the weight of cast material at the bulk increased portion. CONSTITUTION:Frame 6 is set at the lower part of bulk increased portion and cast material (a) is installed at the periphery of the bulk increased portion, thereafter the lower part (b) of the bulk increased portion is installed, the frame 6 is removed and an interface part between the parts (a) and (b) is mixed by a vibrator. Bulk increased portion (c) is installed while a bulk increasing frame 7 is completed in its fixing operation and then an interface between the parts (b) and (c) is mixed by the vibrator. Interval time of casting refractories at the parts (a), (b), and (b), (c) is within 20 minutes in which an adhering characteristic at the interface parts of both of them can be kept during the working operation and a refractory cast interval time of the parts (c) and (a) is kept more than 30 minutes. With such an arrangement it is possible to prevent the periphery (a) of the bulk increased portion from being deformed by a weight of the bulk increased part (c).

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