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1. 发明专利

JP2002030322A APPARATUS FOR REMOVING SKULL STUCK TO BLAST FURNACE LADLE 失效
公开(公告)号：JP2002030322A
公开(公告)日：2002-01-31
申请号：JP2000219925
申请日：2000-07-21
申请人： NIPPON KOKAN KK
发明人： KAWANISHI TATSUHIRO , SERA TAIZO , HIDE KANJI
IPC分类号： B23K7/00 , C21C1/06 , F27D25/00 , F27D23/02
摘要： PROBLEM TO BE SOLVED: To safely and efficiently remove a skull deposited onto a blast furnace ladle. SOLUTION: The apparatus for cutting and removing the skull deposited the blast onto the side wall of the blast furnace ladle after charging the molten iron into a converter is composed of a dust-collecting hood 2, a dust collecting hood truck 3 on which the dust collecting hood 2 is mounted, a cutting torch 5 for melt-cutting the skull 14, a lowering/lifting 6 for lowering/lifting the cutting torch 5 in the blast furnace ladle 11, a swinging device 7 for swinging the lowering/lifting device 6 and a moving device 8 for moving the lowering/ lifting device 6 on the swinging device 7 in the radial direction of the blast furnace ladle 11. In this case, each device can remotely be operated.

2. 发明专利

JP2001179438A CUTTING NOZZLE APPARATUS 失效
公开(公告)号：JP2001179438A
公开(公告)日：2001-07-03
申请号：JP36733299
申请日：1999-12-24
申请人： FUJIKO KK , NIPPON KOKAN KK
发明人： EMI TORU , TSURUMOTO MASATOSHI , KATO TAKASHI , HIDE KANJI , SERA TAIZO , ITAKURA TAKASHI
IPC分类号： B23K7/08 , B23K7/10 , F23D14/52 , F23D14/54
摘要： PROBLEM TO BE SOLVED: To provide a cutting nozzle apparatus to improve the cutting efficiency by using a machine. SOLUTION: The cutting nozzle apparatus independently and separately is comprised of a burner nozzle 14 to heat a work 12 to be cut prior to the heating of a portion 50 to be melted and cut of the work 12 and to form a cutting condition by oxygen, and a cutting nozzle 13 to actually cut the portion to be melted and cut, and the cutting nozzle 13 is disposed in an inclined manner with respect to the burner nozzle 14.

3. 发明专利

JP2000096124A BLOWING METHOD FOR RESTRAINING STICKING OF METAL IN CONVERTER TYPE REFINING FURNACE 失效
公开(公告)号：JP2000096124A
公开(公告)日：2000-04-04
申请号：JP26529698
申请日：1998-09-18
申请人： NIPPON KOKAN KK
发明人： KIKUCHI ICHIRO , TANAKA HIDESHIGE , HIDE KANJI , SERA TAIZO
IPC分类号： C21C5/30 , C21C5/46
摘要： PROBLEM TO BE SOLVED: To melt and remove skull stuck to a furnace opening part and side wall in the furnace without damaging a refractory by adjusting pure oxygen flow rate in the gaseous oxygen jetted from nozzles for melting the skull arranged on the outer peripheral surface of a lance according to the dust concn. in exhaust gas generated during blowing molten iron. SOLUTION: The lance 5 is inserted into the furnace through the furnace opening part 4 from the upper part of a converter 3, in which the molten iron 1 and slag-making material 2 are charged. In the lance 5, an oxygen nozzle 6 for blow-refining is disposed at the lower end part and also, the nozzle 7 for melting the skull on the furnace opening part, is disposed at a prescribed position in the upper part from the lower end part, and the jetting direction from the nozzle 7 for melting the skull is made to downward or in the longitudinal direction in the range of about 40-90 deg. angle formed with the axial line 10 in the longitudinal direction of the perpendicular lance. The dust concn. in the exhaust gas 11 from the converter is measured with an exhaust gas dust concn. meter 12 and the pure oxygen flow rate in the gaseous oxygen jetted from the nozzle 7 for melting the skull, is adjusted according to this concn. to restrain the stuck quantity of the skull 8 stuck on the furnace opening part 4 and its constricting part 4a and the skull 8' stuck on the sidewall in the furnace.

4. 发明专利

JPH1150131A VACUUM DEGASSING VESSEL 失效
公开(公告)号：JPH1150131A
公开(公告)日：1999-02-23
申请号：JP21178397
申请日：1997-08-06
申请人： NIPPON KOKAN KK
发明人： HIDE KANJI , SAKURAI EIJI , YAMAMOTO SHINICHI , HIDE HIROYUKI , OGAWA TAKU
IPC分类号： C21C7/10
摘要： PROBLEM TO BE SOLVED: To provide a vacuum degassing vessel which can drastically increase the frequency of using charge of a lower vessel while restraining the deformation to less than the using limit. SOLUTION: The lower vessel in the vacuum degassing vessel is provided, at the bottom part of the lower vessel 10 in, with one pair of fitting tubes 11a, 11b to the lower ends of which a castable tube fitting flange 12 connecting the tubes is fitted. A cooling means for the fitting tubes composed of one pair of annular cooling water tubes 13 surrounding the fitting tubes to the castable tube fitting flanges, a connecting cooling water tube 14 arranged between one pair of the annular cooling water tubes, a water supplying tube communicated with one side of one pair of the annular cooling tubes and a water drainage tube 16 communicated with the other side of the annular cooling tubes, are provided to the castable tube fitting flange.

5. 发明专利

JPH10102135A METHOD FOR DESULFURIZING MOLTEN STEEL 失效
公开(公告)号：JPH10102135A
公开(公告)日：1998-04-21
申请号：JP25481496
申请日：1996-09-26
申请人： NIPPON KOKAN KK
发明人： SAKURAI EIJI , KAWASHIMA KAZUTOSHI , MATSUNO EIJU , MURAI TAKESHI , ISHIKAWA HIROAKI , HIDE KANJI
IPC分类号： C21C7/04 , C21C7/06 , C21C7/064 , C21C7/10
摘要： PROBLEM TO BE SOLVED: To provide a method for executing desulfurization of molten steel with only transitory reaction of an agent consisting essentially of CaO. SOLUTION: During tapping the steel, the molten steel is sufficiently deoxidized with Al and [sol.Al] in the molten steel is made to high and successively, lime is further added into a molten steel stream to execute the desulfurization and also, T.Fe+MnO is restrained to =0.050wt%, and the desulfurizing agent of only the lime is added and the lowering of sol.Al is executed under condition of satisfying the following equation with the RH. At the time of being (h) (height of a top-blown lance) 0.625[Mn]+0.625, and at the time of being (h)>1.5m, WAl /F02 >(0.625[Mn]+0.625)×(-0.12h+1.18).

6. 发明专利

JPH093519A LANCE FOR REFINING 失效
公开(公告)号：JPH093519A
公开(公告)日：1997-01-07
申请号：JP15918395
申请日：1995-06-26
申请人： NIPPON KOKAN KK
发明人： HIDE KANJI , INOUE SHIGERU
IPC分类号： C21C5/46 , C21C7/072
摘要： PURPOSE: To remove metals stuck to a furnace opening and a lance for refining during refining. CONSTITUTION: In the multi-pipe type lance 1 for refining arranging piping for cooling is provided with a water supplying passage 5 and a water draining passage 4 for cooling at the outside of an oxygen pipe 3 provided with an oxygen nozzle 2 for refining at the tip part, plural nozzles 6 for secondary combustion which can spout the oxygen in the horizontal direction or downward direction along the peripheral direction of the outer peripheral surface of the piping for cooling, are arranged at a fixed interval. Further, plural nozzles 7 for melt-removing the metals which can spout as radial-state by centering each nozzle 6 for the secondary combustion, are arranged and an oxygen passage 10 for supplying the oxygen is connected with each of the nozzles 6 for secondary combustion and the nozzles 7 for melt-removing the metals. By this constitution, the service lives of furnace shell, refractory or the lance are prolonged and dangerous work can be avoided.

7. 发明专利

JP2001200310A GAS SUPPLY HOSE TO REFINING LANCE 失效
公开(公告)号：JP2001200310A
公开(公告)日：2001-07-24
申请号：JP2000012935
申请日：2000-01-21
申请人： NIPPON KOKAN KK
发明人： HIDE KANJI , MATSUURA TOSHIAKI , SERA TAIZO , HIDE HIROYUKI
IPC分类号： C21C5/46
摘要： PROBLEM TO BE SOLVED: To provide a relatively inexpensive gas supply hose to a refining lance which is capable of preventing the wear and failure of a rubber hose and realizing the longer life of the rubber hose. SOLUTION: The gas supply hose to the refining lance which houses a rubber hose 10 group for supplying gas to a refining lance side branch pipe 12 moving from an oxygen source side branch pipe 8 and has a flexible tube 42 having flanged short pipes 41 at both ends and two-split short pipes 44 having flanges the both ends.

8. 发明专利

JP2000257750A EXHAUST GAS VACUUM VALVE FOR VACUUM DEGASSING EQUIPMENT 失效
公开(公告)号：JP2000257750A
公开(公告)日：2000-09-19
申请号：JP6400599
申请日：1999-03-10
申请人： NIPPON KOKAN KK
发明人： HIDE KANJI , YABANETA NOBORU , HIDE HIROYUKI , OSAME MASAO
IPC分类号： F16K1/00 , C21C7/10 , F16K51/00 , F16K51/02 , F27D17/00
摘要： PROBLEM TO BE SOLVED: To eliminate the manual cleaning work by providing injection nozzles for washing a valve seat in a casing. SOLUTION: A washing water supplying pipeline 30 is provided in an upper space inside a casing 22 of each vacuum valve, and an injection nozzle 31a for valve seat 24 and an injection nozzle 31b for valve plate 25 are fitted to this pipeline. During the degassing treatment, washing water is injected from these injection nozzles 31a, 31b toward the valve seat 24 and the valve plate 25 so as to prevent the adhesion of the dust included in the gas. The washing water used for washing the dust is recovered in a hot well through a pipeline 27 and a condenser. The washing water also washes the dust adhered to the pipeline 27 and the condenser. Generation of reverse flow due to a difference of degree of vacuum and contamination with the atmospheric air from a mist separator can be surely prevented by filling the washing water in a recessed part formed by the valve seat and the valve plate of the vacuum valve at the time of closing the vacuum valve so as to seal with the washing water.

9. 发明专利

JP2000204411A LANCE FOR REFINING 失效
公开(公告)号：JP2000204411A
公开(公告)日：2000-07-25
申请号：JP391899
申请日：1999-01-11
申请人： NIPPON KOKAN KK
发明人： HIDE KANJI , OGAWA TAKU , SERA TAIZO , KIKUCHI ICHIRO , HIDE HIROYUKI
IPC分类号： C21C5/46 , C21C1/00 , C21C7/072 , C21C7/10 , F27D25/00 , F27D23/02
摘要： PROBLEM TO BE SOLVED: To restrain the crack and the strain of a gas supplying tube for secondary combustion by connecting the gas supplying tube for secondary combustion with a nozzle for secondary combustion and controlling the supplying quantity of the gas for secondary combustion. SOLUTION: In a cooling water supplying passage 13 in the inside of an outermost cylinder 14, the gas supplying tube 17 for secondary combustion inserted from the upper part of a lance body 7, is disposed. The tip part of the gas supplying tube 17 is connected with the nozzle 10 for secondary combustion. On the way of the gas supplying tube 17, an expanding/shrinking mechanism 15 for absorbing thermal expansion, is arranged. Further, the gas supplying tube 17 is fitted to the inside of the outermost tube 14 through a sliding mechanism 16 having a sliding function for absorbing the vibration of the lance body. The development of the crack and the strain of the gas supplying tube 17 caused by the thermal expansion difference is restrained, because the elongation is scarcely developed with cooling water 20 surrounding this tube by arranging the gas supplying tube 17 for secondary combustion in the cooling water passage 13 in the inside of the outermost cylinder 14.

10. 发明专利

JP2000096121A BLOW-REFINING METHOD FOR RESTRAINING STICKING OF METAL IN CONVERTER TYPE REFINING FURNACE 失效
公开(公告)号：JP2000096121A
公开(公告)日：2000-04-04
申请号：JP26529398
申请日：1998-09-18
申请人： NIPPON KOKAN KK
发明人： KIKUCHI ICHIRO , TANAKA HIDESHIGE , HIDE KANJI , SERA TAIZO
IPC分类号： C21C5/30 , C21C5/46
摘要： PROBLEM TO BE SOLVED: To control the metal sticking state in a furnace without damaging a refractory while securing the productivity. SOLUTION: In a middle stage except till killing the disturbance of gas flowing in the furnace at the initial stage and on and after measuring with a sub-lance at the end stage, oxygen is blown from nozzles 7 for melting the stuck metal in the range of 3-10% of oxygen for blow-refining. At the initial stage and the end stage, the positively melting of the stuck metal is not executed and mainly the purge gas is made to flow from the nozzles 7 for melting the stuck metal to prevent the clogging. The stage for stopping the supply of the oxygen for melting the stuck metal is changed with the blowing formation of refining objective steel kind, variation of blowing factor, normal blowing or less-slag blowing or dephosphorization blowing of molten iron, and the end stage is made to be the interval from the point of time in 70-95% after starting the blow-refining till completing the blow-refining. The oxygen for melting the stuck metal in the purge stage is made to be =10 kg/t-steel and the operation in

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