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11. 实用新型

JP2548737Y2 失效
公开(公告)号：JP2548737Y2
公开(公告)日：1997-09-24
申请号：JP9263491
申请日：1991-10-16
IPC分类号： F27B3/08 , B22D41/46 , C21C5/46 , F27B3/19

12. 发明专利

JPH0890213A METHOD FOR POURING MOLTEN STEEL 失效
公开(公告)号：JPH0890213A
公开(公告)日：1996-04-09
申请号：JP24679394
申请日：1994-09-16
申请人： NIPPON STEEL CORP
发明人： MIZUKAMI YOSHIMASA , SASAI KATSUHIRO
IPC分类号： B22D41/46 , B22D11/10
摘要： PURPOSE: To obtain the molten metal pouring method which easily drops a plugging material in a molten metal discharging tuyere and prevents the lowering of productivity and quality of a cast slab by blowing flux containing one or more kinds of materials containing B, Na and F from the inner wall of the molten metal discharging tuyere. CONSTITUTION: At the time of opening a sliding nozzle 4, the plugging material 8 is dropped by the static pressure of molten steel 2 and the molten steel 2 held in the molten metal vessel 1 is poured into a tundish 7 through the molten metal discharging tuyere 3 and a long nozzle 5. At the time of holding the molten steel 2 in the molten metal vessel 1 for long time, the plugging material 8 is excessively sintered and does not happen to drop. In the case of clogging the molten metal discharging tuyere 3 in such a way, the plugging material 8 is dropped by blowing the flux containing at least one kinds or more in the materials containing B, Na, F and C from a flux introducing hole on the inner wall surface 10 of the molten metal pouring tuyere. By this method, the dropping of the plugging material 8 in the molten metal discharging tuyere 3 is facilitated.

13. 发明专利

JPH07308763A FILLER OF SLIDING NOZZLE 失效
公开(公告)号：JPH07308763A
公开(公告)日：1995-11-28
申请号：JP12694594
申请日：1994-05-16
申请人： TOKYO YOGYO KK
发明人： OOHORA YORIKO , KOIKE YASUTA , HATSUTANDA HIROKATSU
IPC分类号： B22D41/46 , B22D11/10 , C04B35/12
摘要： PURPOSE:To provide the filler of a sliding nozzle where the excellent ratio of the natural opening is obtained, no penetration of the base metal generated. and the excellent result is obtained. CONSTITUTION:The filler consists of the mixture of the high purity silica sand having the composition consisting of, by weight, >=95% SiO2, and the chromium ore having the composition consisting of 40-50% Cr2O3 (where, the breakdown of the mixture is 10-40% silica sand and 90-60% chromium ore). This mixture contains 52wt.% alkaline metal oxide. This constitution insures the extremely excellent result of >=99% natural opening ratio for the practical use. No penetration of the base metal is found, leading to excellent results. When silica sand and chromium ore are mixed at this ratio, no excessive sintering condition is found, and the floating due to entering of the molten steel is hardly observed.

14. 发明专利

JPH0780613A METHOD AND DEVICE FOR DISCHARGING LADLE SAND IN CONTINUOUS CASTING EQUIPMENT 失效
公开(公告)号：JPH0780613A
公开(公告)日：1995-03-28
申请号：JP24745993
申请日：1993-09-08
申请人： KAWASAKI STEEL CO , SUMITOMO HEAVY INDUSTRIES
发明人： TOMIYAMA TOSHIRO , ICHIHARA AKIRA , ABE KAZUO
IPC分类号： B22D11/10 , B22D41/46
摘要： PURPOSE:To reduce the danger of a ladle sand discharging work of a ladle and to effectively discharge the ladle sand even with remote operation by an operator, by shifting a receiving pot for ladle sand while synchronizing with the shifting speed of the ladle along the shifting locus of a nozzle hole of the ladle. CONSTITUTION:As the receiving pot 17 for ladle sand is held on a rotary carrier 12 and shifted together with the ladle 5 just above the receiving pot, the ladle sand can be discharged by sliding a slide plate at the lower end of the nozzle hole in the optional position. Further, the receiving pot 17 for ladle sand can always receive drip flow of the molten steel at the lower part of the ladle 5 by synchronously shifting a receiving pot rotary carrier 12 with the rotatively shifting speed of a ladle turret 1 and spattering of the molten steel to the surroundings can be prevented and the dangerous work is eliminated. Then, as the receiving pot 17 can be shifted to the optional position along the locus of the nozzle hole 18, the nozzle hole opening device 25 can be arranged at the intermediate position between a waiting position A and a pouring position B, and the operator can control with the rotary carrier 12 with the remote operation.

15. 发明专利

JPH0691354A PACKING MATERIAL FOR NOZZLE HOLE FOR MOLTEN METAL FLOW RATE CONTROLLER 失效
公开(公告)号：JPH0691354A
公开(公告)日：1994-04-05
申请号：JP24468592
申请日：1992-09-14
申请人： SHINAGAWA REFRACTORIES CO
发明人： KURASHINA YUKINOBU , TSUKAMOTO NOBORU , YANAGAWA HIROMI , OKAWA YUKIO
IPC分类号： B22D11/10 , B22D41/46
摘要： PURPOSE:To stabilize the natural opening rate of a nozzle for controlling a molten metal flow rate by adding graphite to a silica sand raw material and pelletizing the raw material by using resin binder. CONSTITUTION:The graphite is added to the silica sand and/or zircon raw material and the raw material is pelletized by using the resin binder, by which the packing material for the nozzle hole for the molten metal flow rate controller is obtd. Commercially marketed thermoplastic resin and/or thermosetting resins (phenolic resins, epoxy resins, others), etc., are used as the resin binder and are pelletized by, for example, a pelletizer, etc., after intimate mixing. The natural opening rate in particular is thereby stabilized when this packing material is used as the packing material for the lower layer of packed layers constituted of multiple layers.

16. 发明专利

JPH04327362A DISCHARGING TREATMENT DEVICE FOR PLUGGING SAND INTO STEEL DISCHARGING HOLE IN LADLE 失效
公开(公告)号：JPH04327362A
公开(公告)日：1992-11-16
申请号：JP9914491
申请日：1991-04-30
申请人： KAWASAKI STEEL CO
发明人： YUHARA SUSUMU , MATSUKAWA TOSHITANE
IPC分类号： B22D41/46 , B22D43/00
摘要： PURPOSE:To easily take out solidified plugging sand together with molten steel from the inner part of a discharging pot after discharging the plugging sand for a steel discharging hole in a ladle together with the accompanied discharging molten steel into the discharging pot. CONSTITUTION:On the way of a course for shifting the ladle 1 loaded on a ladle turret 2 above a tundish 3, the discharging pot 5 is put. At this time, a steel plate welding structural solidification accelerator 6 having a hanging hole 19 in the discharging pot 5 is preset. The ladle 1 is stopped above the discharging pot 5, and after fully discharging the plugging sand packed in the steel discharging hole, the ladle is shifted above the tundish 3 and the pouring of molten steel is started. The plugging sand and the accompanied molten steel discharged in the discharging pot 5 are cooled with the solidification accelerator 6 to form a solidified block 20. The solidified block 20 can be easily taken out only by hanging this from the discharging pot 5 with a hanging tool 7.

17. 实用新型

JPH0326953Y2 失效
公开(公告)号：JPH0326953Y2
公开(公告)日：1991-06-11
申请号：JP18538486
申请日：1986-12-01
IPC分类号： B07B4/04 , B07B7/04 , B22D37/00 , B22D41/46

18. 发明专利

JPH02175069A NOZZLE HOLE PACKING STRUCTURE OF SLIDING NOZZLE 失效
公开(公告)号：JPH02175069A
公开(公告)日：1990-07-06
申请号：JP33297988
申请日：1988-12-27
申请人： KAWASAKI REFRACTORIES CO LTD
发明人： HITOMI SHOICHI
IPC分类号： B22D41/46
摘要： PURPOSE:To prevent molten steel from penetrating into a nozzle hole by forming a refractory powder coating film in which an inorganic binder is used as a dispersion medium on the surface of a packed material of the nozzle hole. CONSTITUTION:A nozzle hole 2 of a sliding nozzle 1 is packed with a packing material 3. Subsequently, on the surface of the packing material 3, a refractory powder coating film 4 in which an inorganic binder is used as a dispersion medium is formed. As for the inorganic binder, for instance, that which is well- known such as a silica sol, an alumina sol, etc., is enough. In such a way, a natural numerical aperture of the nozzle can be enhanced.

19. 发明专利

JPH0259152A METHOD FOR SUPPLYING MOLTEN METAL INTO STRIP CONTINUOUS CASTING APPARATUS 失效
公开(公告)号：JPH0259152A
公开(公告)日：1990-02-28
申请号：JP21137588
申请日：1988-08-25
申请人： NIPPON STEEL CORP
发明人： TANAKA SHIGENORI , MIZUCHI ISAO , OTANI NORITOSHI , ENOMOTO MITSURU
IPC分类号： B22D11/10 , B22D11/103 , B22D11/119 , B22D41/16 , B22D41/46
摘要： PURPOSE:To control flow rate of molten metal supplying from a melting furnace without sticking between a stopper and a nozzle and without developing breakage of the stopper by beforehand inserting fibrous refractory between the nozzle widened upward and tip part of the stopper before starting melting. CONSTITUTION:After inserting the fabrous refractories 4 without any gap between the nozzle 11 widened upward and the tip part 2a of the stopper and without any piling-up, the metal charged in a melting furnace 1 is melted. As the stopper 2 is closed during melting the metal, the fibrous refractory 4 is fastened between the tip part 2a and the nozzle 1 widened upward and as the gap can be perfectly plugged, the leakage of the molten metal is prevented and as the direct contact of the tip part 2a of the stopper and the nozzle 11 widened upward is prevented, the deformation, breakage and sticking of the end part 2a of the stopper are prevented. Therefore, as the shape of the tip part 2a of the stopper is stabilized, the pouring rate can be controlled by stably adjusting the gap between the tip part 2a of the stopper and the nozzle 11 widened upward so that meniscus at the pouring basin part during continuously casting a strip becomes the constant.

20. 发明专利

JPH01133664A NATURAL OPENING METHOD FOR POURING NOZZLE OF LADLE 失效
公开(公告)号：JPH01133664A
公开(公告)日：1989-05-25
申请号：JP29358587
申请日：1987-11-20
申请人： NIPPON KOKAN KK
发明人： HARADA SHOJI
IPC分类号： B22D41/44 , B22D11/10 , B22D41/46
摘要： PURPOSE:To enable a natural opening by an inexpensive fuming stock by passing the generated gas caused by the roast of a fuming stock through the inside of the sintered layer of a silica sand. CONSTITUTION:The fuming material 4 of a sawdust, wooden piece, etc., formed in a sand packed silica sand 2 is filled into a pouring nozzle hole 1. By doing so a gas is generated with the fuming material 4 being roasted by the heat of a molten steel when the molten steel is received in the ladle. The generated gas comes to a sintered layer 5 by having some pressure, forming a crack or multiple aperture on the sintered layer 5 and discharging it into the molten steel. The sintered layer 5 is easily destroyed by the static pressure of the molten steel because it becomes thin and porous or cracked. Consequently the natural opening is enabled.

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