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1. 发明专利

JPH09269193A GITTER BRICK WITH BYPASS PASSAGE, STACKING METHOD THEREFOR, AND METHOD FOR REPAIRING BRICK MASONRY IN REGENENERATOR OF HOT BLAST STOVE 失效
公开(公告)号：JPH09269193A
公开(公告)日：1997-10-14
申请号：JP23066796
申请日：1996-08-30
申请人： KAWASAKI STEEL CO , KAWASAKI REFRACTORIES CO LTD
发明人： FUJITA MASAO , ONO CHIKAO , AIZAWA KANJI , SATO YOSHICHIKA , KAMIYA TOSHIO , MASUMOTO SHINICHI , NANBU MASAO , NAKAJIMA MASAYOSHI , ISOZAKI TAKAHARU
IPC分类号： C21B9/02 , C21B9/10 , F17D1/04 , F27D1/00 , F27D1/04
摘要： PROBLEM TO BE SOLVED: To easily manufacture a hot blast stove while maintain a thermal efficiency of the hot blast stove and strength of a brick at high levels by contriving an arrangement of dowels and dowel holes on gitter bricks, which are stacked in an interior of a regenerator in the hot blast stove to serve as a medium of heat exchange between a high temperature gas and a cold air flow. SOLUTION: A brick body 7 is in the form of hexagonal column to be provided with six through holes 5 of circular cross section which extend between an upper surface 15 and a lower surface 16 and surround a central through hole 13. Vertical grooves 6 are provided on respective tops 18 of the brick body 7 and on side surfaces 14 intermediate between the respective pieces, and dowels 11 and dowel holes 12 for engagement of upper and lower bricks are provided on either ends of the through holes 5 on the upper surface 15 and the lower surface 16 with a spacing of 120 degrees. In order to provide communication between ends of those of the six through holes 5 which are not provided with the dowels 11 or the dowel holes 12, and ends of the three vertical grooves 6 adjacent to the ends of those through holes, common grooves 17 having a large width are cut as bypass passages and are set to have a depth in the range of 3 to 14% of the brick height.

2. 发明专利

JP2002060815A METHOD AND DEVICE FOR CHARGING REDUCED VOLUME OF COMPRESSIBLE CHARGING MATERIAL 失效
公开(公告)号：JP2002060815A
公开(公告)日：2002-02-28
申请号：JP2000253511
申请日：2000-08-24
申请人： KAWASAKI STEEL CO
发明人： AIZAWA KANJI
IPC分类号： F23G5/02 , B09B3/00 , B29B17/00 , C10L5/44 , C10L5/46 , C10L5/48 , C10L10/08 , C21B5/00 , C21B7/00 , C22B1/248 , F23G5/44 , F27D3/08
摘要： PROBLEM TO BE SOLVED: To provide a method and device for reducing the volume of a compressible charging material and charging them directly into a furnace. SOLUTION: The compressible charging material is compressed by charging into a pushing/forming machine, pushed out as the formed body from a forming die and fed out into the furnace passing through a supplying tube communicated in the furnace through a hole which has larger cross sectional area than the forming cross sectional area of the forming die and is connected to the forming die and bored in the furnace wall.

3. 发明专利

JPH0938769A METHOD FOR IGNITING OXYGEN LANCE FOR FUSION CUTTING 失效
公开(公告)号：JPH0938769A
公开(公告)日：1997-02-10
申请号：JP19181395
申请日：1995-07-27
申请人： KAWASAKI STEEL CO
发明人： AIZAWA KANJI
IPC分类号： B23K5/24
摘要： PROBLEM TO BE SOLVED: To make it possible to safely ignite an oxygen lance without using a pilot fire by grinding or cutting the front end of a lance pipe with a grinder or cut saw, etc., and igniting the oxygen lance with generated frictional heat. SOLUTION: Gaseous oxygen 8 is supplied from a hose 4 and is ejected from the front end 1a of a lance pipe 1. The flow rate of the gas is previously throttled slightly by a valve 3 to prevent the heating of the front end 1a from being hindered by the cooling of the gaseous oxygen 8. Vigorous sparks 9 are generated from a contact part when the front end 1a of the lance pipe 1 is cut by the cutting teeth 7 of a grinder 6. Further, the cut port is heated red by feeding-in of the cutting teeth 7, by which the sparks of high luminance are begun to be mingled and the cut end is ignited. The front end 1a of the lance pipe 1 continues burning while dropping the metal 10 when the cutting teeth 7 are relieved rapidly. A gushing flame is obtd. by opening the valve 3. The ignition of the oxygen lance is possible without using the pilot fire in such a manner and the firing is possible even in a place where the arrangement of the pilot fire is undesirable for safety.

4. 发明专利

JPH062025A DEVICE FOR REMOVING STUCK METAL TO FURNACE OPENING PART IN CONVERTER 失效
公开(公告)号：JPH062025A
公开(公告)日：1994-01-11
申请号：JP16475892
申请日：1992-06-23
申请人： KAWASAKI STEEL CO
发明人： MIKUNI MASATO , AIZAWA KANJI
IPC分类号： C21C5/46
摘要： PURPOSE:To safely and quickly remove the stuck metal to a furnace opening part in a converter. CONSTITUTION:In the removing device, a rotary frame 2 being shiftable to advance/retreat toward the furnace opening part 1a of the converter 1 and having an axial center along the shifting direction of advancing/retreating is provided. To this rotary frame 2, at least one piece of a lance 3 for blowing oxygen toward the metal (m) stuck to the furnace opening part 1a in the converter 3 is held. Further, in this removing device, shifting mechanism 4 for shifting to advance/retreat this lance 3 individually to a rotary frame 2 and shaking mechanism for shifting the lance 3 on a rotary frame 2 are arranged.

5. 发明专利

JPH04301027A EQUIPMENT FOR TRANSPORTING POWDER 失效
公开(公告)号：JPH04301027A
公开(公告)日：1992-10-23
申请号：JP8914491
申请日：1991-03-29
申请人： KAWASAKI STEEL CO
发明人： AIZAWA KANJI , TAKASHIBA NOBUMOTO
IPC分类号： B65G53/40 , B65G53/18 , C21C1/00
摘要： PURPOSE:To quickly remove foreign matters and aggregation of powder in powder feeding pipe in transporting equipment for powder and to stably operate this equipment. CONSTITUTION:In the equipment provided with a powder feeding pipe 3 connected to transporting passage 4 for powder 1 in a vessel body 2 for containing the powder 1 and an aeration mechanism 5 for forming fluidized condition of the powder 1 at the bottom part in the vessel body 2, a discharging passage 6 for discharging the powder 1 contained in the vessel body, is arranged at the bottom part of vessel body 2, and a valve for executing flowing and shutting off of the powder 1 at this discharging passage 6 and conveyed gas supplying passage 7 for executing dilution and convey of the powder 1, are installed.

6. 发明专利

JPH0459912A REDUCED PRESSURE REFINING APPARATUS FOR MOLTEN METAL 失效
公开(公告)号：JPH0459912A
公开(公告)日：1992-02-26
申请号：JP17164890
申请日：1990-06-29
申请人： KAWASAKI STEEL CO
发明人： AIZAWA KANJI , TAKASHIBA NOBUMOTO
IPC分类号： C21C7/072 , C21C7/10
摘要： PURPOSE:To restrain wear of refractory and to further improve decarbonizing velocity by forming cross-sectional shape of a reduced pressure cylindrical body to elliptic shape and making eccentrically of setting position for a porous plug arranged at the bottom part of a ladle to major axial direction of the ellipse of reduced pressure cylindrical body. CONSTITUTION:The cross section of reduced pressure-cylindrical body 1a is formed to elliptic shape and the porous plug 13 in the ladle 7 is arranged at the eccentric position as far as possible to the major axial direction of the ellipse in the range of enclosing float-up bubbles 18 from the porous plug in the reduced pressure cylindrical body 1a. At near surface of the reduced pressure cylindrical body 1a in ascending stream developed accompanied with the float-up bubbles, at the time when flowing the stream toward reverse side to the setting position of porous plug 13, it is difficult to spread to the minor axial direction, and, surface stream 20B having strong directivity to the major axial direction is developed. When this surface stream collides to inner wall 15 of the reduced pressure cylindrical body 1a at the opposite side to the setting position of porous plug 13, the stream changes to a descending direction, but as the surface stream 20B in the reduced pressure cylindrical body 1a is the strong stream having directivity, the descending stream becomes strong stream.

7. 发明专利

JPH0327299B2 失效
公开(公告)号：JPH0327299B2
公开(公告)日：1991-04-15
申请号：JP8091686
申请日：1986-04-08
申请人： KAWASAKI STEEL CO
发明人： KOJIMA SHINJI , MATSUKAWA TOSHITANE , AIZAWA KANJI
IPC分类号： B22D7/04

8. 发明专利

JPH02197515A SMELTING METHOD FOR DEAD SOFT STEEL HAVING HIGH CLEANNESS 失效
公开(公告)号：JPH02197515A
公开(公告)日：1990-08-06
申请号：JP1585489
申请日：1989-01-25
申请人： KAWASAKI STEEL CO
发明人： AIZAWA KANJI , KOJIMA SHINJI , TAKASHIBA NOBUMOTO
IPC分类号： C21C7/10
摘要： PURPOSE:To prevent the splash of molten and the shortening of the service life of the refractories of a vacuum degassing vessel by dispersing fine bubbles of an inert gas as nuclei for generating bubbles in the molten steel in a ladle or the like, feeding the molten steel into the degassing vessel and accelerating the decarburization reaction of the molten steel. CONSTITUTION:An inert gas 7 for generating fine bubbles 8 is blown into molten steel 2 in a ladle 4 through porous plugs 6 fixed in the bottom of the ladle 4 or the like. The molten steel 2 contg. generated fine bubbles 8 is circulated in a vacuum degassing vessel 14 under reduced pressure. The decarburization reaction of the molten steel is accelerated and dead soft steel having high cleanness is obtd.

9. 发明专利

JPS62296941A PRODUCTION OF HOLLOW METALLIC INGOT 失效
公开(公告)号：JPS62296941A
公开(公告)日：1987-12-24
申请号：JP14027986
申请日：1986-06-18
申请人： KAWASAKI STEEL CO
发明人： SAITO KENJI , OGUCHI MASAO , KATO TOSHIO , OZU SHUJI , AIZAWA KANJI , YAO SHO
IPC分类号： B22D7/04
摘要： PURPOSE:To safely produce a good-quality ingot providing a cylindrical grating type buckling adjusting flask to the inside of a cylindrical metallic core in the central part of a casting mold and blowing an inert gas during casting and water or gas-mixed mists after buckling of the core from a central cooling nozzle. CONSTITUTION:The cylindrical grating type buckling adjusting flask 7 having 5-50mm spaces to prevent the generation of shell cracking is disposed to the inside of the cylindrical metal core 6 disposed to the central part of the casting mold 2. The inert gas is blown to the metallic core 6 from the central cooling nozzle 8 during casting to permit the free shrinkage, on cooling, to the formed shell by the buckling of the metallic core 6, thereby preventing the generation of the surface cracking. The water or the water-gas mixed mists are blown to cool and strengthen the shell during the growth of the casting, by which the generation inverted V segregation is prevented and the buckling deformation is maintained within the specified value. The generation of the internal shell cracking and leakage of the molten steel are thus prevented. The ingot having the good quality without having cracks is thus formed and the hollow ingot is safely produced without the possibility of a steam explosion.

10. 发明专利

JPS61176443A MANUFACTURE OF HOLLOW INGOT 失效
公开(公告)号：JPS61176443A
公开(公告)日：1986-08-08
申请号：JP1577685
申请日：1985-01-30
申请人： KAWASAKI STEEL CO
发明人： AIZAWA KANJI , KOJIMA SHINJI
IPC分类号： B22D7/04 , B22D27/04
摘要： PURPOSE:To prevent an internal segregation without causing explosion by forming a cylindrical core of a metallic mold into a triple-wall construction, and charging a gas or a mixture of gas and liquid in-between the inner and intermediate cylinders, and charging the gas in between the intermediate and outer cylinders during a solidifying period or its former period and the liquid during the latter period. CONSTITUTION:A cylindrical mold core 9 is set on the middle of a metallic mold 8 mounted on a mold plate 4, and is formed into a triple-wall construction. A gas or a mixture of gas and liquid is charged in-between the inner and intermediate cylinders 18, 16 from a refrigerant piping 20 through a discharging port 22. Further, the gas is charged in-between the intermediate and outer cylinders 16, 14 from a discharging port 26 of a refrigerant introducing pipe 24 through a solidifying period; or the gas for the former period, and the liquid for the latter period after gradual cooling are supplied to perform forces cooling. Thus an internal segregation at the central part of a casting is prevented by effectively performing the forced cooling of the core 9 without causing vapor explosion.

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