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1. 发明专利

JP2842204B2 失效
公开(公告)号：JP2842204B2
公开(公告)日：1998-12-24
申请号：JP657194
申请日：1994-01-25
申请人： NIPPON KOKAN KK
发明人： SUZUKAWA YUTAKA , KURIHARA MASANORI , TAGUCHI NOBORU , IWABUCHI MASAHIRO , KOBAYASHI KOJI
IPC分类号： C23C2/00

2. 发明专利

JPH08246120A TURN DOWN ROLL CHAMBER FOR CONTINUOUS GALVANIZING LINE 失效
公开(公告)号：JPH08246120A
公开(公告)日：1996-09-24
申请号：JP4569795
申请日：1995-03-06
申请人： NIPPON KOKAN KK
发明人： KURIHARA MASANORI , MAKI HIROSHI , HATAKEYAMA MASAYUKI , INOUE SHIGERU
IPC分类号： C23C2/00 , C23C2/02
摘要： PURPOSE: To prevent the solidification and adhesion of zinc to a turn down roll chamber and more particularly the ceiling part in the turn down roll chamber of a continuous galvanizing line. CONSTITUTION: The ceiling part 8 of the turn down roll chamber 7 is provided with heating means, such as an electrical heater 1, for heating up the internal ceiling part. As a result, the solidification and adhesion of the zinc vapor in the atmosphere to the ceiling part in the turn down roll chamber are suppressed. Consequently, the fall of the solidified and adhered matter of the zinc onto a steel sheet does not arise any more and the generation of a defect occurring therein is prevented.

3. 发明专利

JPH06158182A METHOD FOR HEATING STEEL STRIP IN CONTINUOUS ANNEALING FURNACE AND EQUIPMENT USED THEREFOR 失效
公开(公告)号：JPH06158182A
公开(公告)日：1994-06-07
申请号：JP33798592
申请日：1992-11-25
申请人： NIPPON KOKAN KK
发明人： KURIHARA MASANORI , TAGUCHI NOBORU , TAKAGI KEIJI , IWASAKI HIDEO
IPC分类号： C21D9/56 , C21D1/52 , C21D1/76 , C21D11/00
摘要： PURPOSE:To simply and surely control the flow rate of the combustion gas of a heating furnace to be supplied to a preheating furnace, and to correctly preheat the steel strip without generating the oxide film when the steel strip is continuously passed through the preheating furnace and a continuously annealing furnace having a direct fire heating furnace and preheated by the combustion gas of the heating furnace. CONSTITUTION:The use amount of the fuel to heat a steel strip 1 to the prescribed temperature in a direct fire heating furnace 3 is measured, the flow rate of the combustion gas of the heating furnace to be supplied to a preheating furnace 2 is obtained based on the measured use amount of the fuel, and the steel strip 1 is preheated by supplying the combustion gas of the obtained flow rate.

4. 发明专利

JPH04329856A METHOD FOR CONTROLLING INFILTRATING SHEET TEMPERATURE INTO GALVANIZING BATH IN CONTINUOUS GALVANIZING FOR STEEL STRIP 失效
公开(公告)号：JPH04329856A
公开(公告)日：1992-11-18
申请号：JP12509691
申请日：1991-04-26
申请人： NIPPON KOKAN KK
发明人： KURIHARA MASANORI , SATO HIROAKI , IDETA TATATOMI
IPC分类号： C23C2/00 , C23C2/06 , C23C2/40
摘要： PURPOSE:To offer a method for executing the temp. controlling of a steel sheet immediately before the infiltration into a pot in a continuous galvanizing apparatus provided with a snout. CONSTITUTION:At the time of continuously immersing and passing a steel strip after annealing treatment into a galvanizing bath and executing galvanizing, the steel strip is heated by a heating apparatus 8 provided in a snout part 4, and the temp. of the steel strip immediately before the intrusion into the zinc bath is finely controlled.

5. 发明专利

JPH093673A DEVICE AND METHOD FOR PICKLING STEEL SHEET 失效
公开(公告)号：JPH093673A
公开(公告)日：1997-01-07
申请号：JP15616095
申请日：1995-06-22
申请人： NIPPON KOKAN KK
发明人： SUGA SEIJI , KURIHARA MASANORI , ISHIGUCHI YUKIO
IPC分类号： B21B45/00 , B21C43/00 , C23G1/04 , C23G1/08 , C23G3/02
摘要： PURPOSE: To reduce pickling time by heating a steel sheet at the entrance side of a pickling tank, controlling the immersion time of the steel sheet by means of a sink roll in the pickling part, and discharging the acid liquid, scales and insoluble matters from the bottom of the tank. CONSTITUTION: A steel sheet 1 is passed through a bridle roll 12, heated by a heating device 13, with the temp. controlled at 100-300 deg.C by a thermometer 15, and pickled in a pickling tank 16 by way of a buckling preventing roll 22. The supporting angle of the steel sheet 1 is set at 30-60 deg. against the level of the liquid into which the steel sheet 1 is immersed. The immersion time is controlled by the sink roll 1M. A hydrochloric acid solution with 4-8weight% is fed to the pickling tank 16 at the rate of 60-150kg per ton of steel sheets. The acid liquid is drained from the bottom of the tank 16 into a circulation tank 21. The concentration and the temp. of the acid liquid are adjusted in the circulation tank 21 with exhaust heat recovered by a heat exchanger 19 simultaneously. The steel sheet 1 is rinsed in a rinsing tank 20 and then sent to a succeeding process. Being heated and immersed in the tank 16, the steel sheet 1 is rendered to a nuclear boiling state, which causes minute cracks in the scales and enhances pickling effect.

6. 发明专利

JPH083652A METHOD FOR SEALING INLET OF PREHEATING FURNACE FOR DIRECTLY FIRING FURNACE AND DEVICE THEREFOR 失效
公开(公告)号：JPH083652A
公开(公告)日：1996-01-09
申请号：JP14052594
申请日：1994-06-22
申请人： NIPPON KOKAN KK
发明人： TAKAGI KEIJI , KURIHARA MASANORI , TSUTSUMI MICHIAKI
IPC分类号： C21D1/00 , C21D1/74 , C21D9/56 , F27D7/06
摘要： PURPOSE:To provide an inlet sealing method of a preheating furnace for preheating a steel strip in a continuous annealing system having a directly firing type preheating furnace and a device therefor. CONSTITUTION:In the continuous annealing system having the directly firing type preheating furnace, when the inner pressure of the preheating furnace 1 for preheating the steel strip 20 is higher than the outer atmospheric pressure, the differential pressure in terms of (the inner pressure at the gas sealing part connected with the preheating furnace) - (the inner pressure of the preheating furnace) is objected to be 2-6mm H2O. By this method, as the sealing device can be equipped at a low cost and the bedewing can be prevented, damage to the quality of the steel strip can be prevented.

7. 发明专利

JPH07180015A HOT DIP METAL COATING DEVICE 失效
公开(公告)号：JPH07180015A
公开(公告)日：1995-07-18
申请号：JP32778793
申请日：1993-12-24
申请人： NIPPON KOKAN KK
发明人： KURIHARA MASANORI , SUZUKAWA YUTAKA
IPC分类号： C23C2/00 , C23C2/40
摘要： PURPOSE:To provide a hot dip metal coating device capable of effectively preventing winding of the bottom dross in a plating bath which is of a problem when a band-shaped metallic member is subjected to hot dip metal coating. CONSTITUTION:A plating bath tank 3 housing molten metal and a sink roll 10 disposed in this plating bath tank 3 are used as main constituting members. Recessed parts 16 concentrical with the end faces of this sink roll 10 are formed at the end faces of the roll. The depth of these recessed parts 16 satisfies a relation 2L/D>=0.2 when L is defined as the depth of the recessed parts from the end faces of the roll and D as the diameter of the roll. As a result, the bottom dross is controlled to a direction parting from the sink roll by the swirling flow from the recessed parts 16 of the end face of the sink roll generated by rotation of the sink roll 10 when the band-shaped metallic member 1 is subjected to hot clip metal coating.

8. 发明专利

JPH07197282A HIGH-SPEED PICKLING DEVICE AND HIGH-SPEED PICKLING METHOD FOR STEEL SHEET 失效
公开(公告)号：JPH07197282A
公开(公告)日：1995-08-01
申请号：JP35102993
申请日：1993-12-28
申请人： NIPPON KOKAN KK
发明人： SUGA SEIJI , ISHIGUCHI YUKIO , KURIHARA MASANORI
IPC分类号： B21B45/06 , C23G1/08 , C23G3/02
摘要： PURPOSE:To drastically shorten the time for a pickling treatment and to decrease the number of pickling tanks by installing an induction heater to the fore stage of the pickling tank and heating the steel sheet to be charged into the pickling tank to a temp. range above the b.p. of an acid liquid, thereby subjecting the steel sheet to a descaling treatment. CONSTITUTION:The hot rolled steel sheet 1 is introduced via bridle rolls 12 into the induction heater 13 where the steel sheet is heated to the prescribed temp. in a range of about 100 to 300 deg.C. The heated steel sheet is introduced into the pickling tank 16. At this time, the temp. of the steel sheet 1 is continuously detected without contact by a thermometer 15 and is inputted to an arithmetic section 30 which in turn controls the induction heater 13 via a control section 40, thereby maintaining the specified temp. of the steel sheet 1. A heat exchanger 19 is controlled by the arithmetic section 30 and the control section 40 in such a manner that the liquid temp. in the pickling tank 16 is maintained at 80 to 90 deg.C by this heat exchanger 19. The steel sheet 1 is immersed into the acid liquid and is pulled up by a sink roll 17 of a vertically moving type, by which the pickling is regulated. The hot water recovered in the heat exchanger 19 is introduced into the next rinsing tank 20. As a result, the steel sheet 1 well finished by the pickling is stably obtd.

9. 发明专利

JPH0533066A WATER-COOLED ROLL FOR COOLING STEEL SHEET 失效
公开(公告)号：JPH0533066A
公开(公告)日：1993-02-09
申请号：JP18278191
申请日：1991-07-24
申请人： NIPPON KOKAN KK
发明人： KURIHARA MASANORI , SATO HIROAKI , MATSUI NAOKI , YOSHIDA HIROSHI
IPC分类号： C21D9/573 , C23C4/10
摘要： PURPOSE:To prevent nonuniform cooling and deformation of a steel sheet due to the nonuniform cooling in the roll with the periphery of its main body coated with a protective coating layer of metal oxide by specifying the relation between the thickness and surface roughness of the coating layer and the contact heat- transfer coefficient. CONSTITUTION:A protective coating layer 21 of metal oxide such as Al oxide is formed on the periphery of the main body 22 of a roll to constitute the water- cooled roll 20 for cooling a steel sheet. The thickness dt and surface roughness delta2 (mu) of the coating layer 21 are determined so that the contact heat-transfer coefficient K shown by the equation between the periphery of the roll 20 and the steel sheet is controlled to 800-2500 kcal/m . deg.C.h. In the equation, alpha=0.85, beta=5.5, delta1 is the surface roughness (mu), P is the contact pressure (kg/cm ), Hv is the hardness of the steel strip (kg/mm ), and lambda1, lambda2 and lambda3 are respectively the heat conductivities (kcal/m.h. deg.C) of the substances interposed between the steel strip, coating layer and contact surface.

10. 发明专利

JPH02290925A METHOD FOR NONOXIDATIVELY HEATING BAND STEEL 失效
公开(公告)号：JPH02290925A
公开(公告)日：1990-11-30
申请号：JP10735189
申请日：1989-04-28
申请人： NIPPON KOKAN KK
发明人： KURIHARA MASANORI , YOSHIDA HIROSHI , IDETA TATATOMI , SATO HIROAKI , SUZUKAWA YUTAKA
IPC分类号： C21D9/56
摘要： PURPOSE:To carry out efficient nonoxidative heating in a directfired furnace and to cope with the kind of steel strict to nonoxidizing conditions by using a nozzle-type reducing burner at the time of heating a band steel in the reductive heating region at the succeeding stage in the direct-fired furnace. CONSTITUTION:The band steel surface is exposed to the region of the combustion gas obtained by burning a gas in a burner at

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