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61. 发明专利

JPH05163503A METHOD FOR STABILIZING MAGNETIC METAL POWDER 失效
公开(公告)号：JPH05163503A
公开(公告)日：1993-06-29
申请号：JP32862791
申请日：1991-12-12
申请人： NIPPON KOKAN KK
发明人： SATO HIDEAKI , MAEDA TOMOO , SHIBUYA YOSHIKI , OKUYAMA KEIICHI
IPC分类号： B22F1/02 , C23C8/12 , H01F1/06
摘要： PURPOSE:To directly stabilize a magnetic metal powder of

62. 发明专利

JP2000248321A METHOD FOR CONTROLLING MOISTURE IN SINTERING RAW MATERIAL 失效
公开(公告)号：JP2000248321A
公开(公告)日：2000-09-12
申请号：JP5022699
申请日：1999-02-26
申请人： NIPPON KOKAN KK
发明人： SATO HIDEAKI , WATANABE TAKASHI
IPC分类号： G01N21/3554 , C22B1/20 , G01N21/35
摘要： PROBLEM TO BE SOLVED: To accurately and stably control the moisture value in sintering raw material at the production of sintered ore from iron ore. SOLUTION: In a method for controlling the moisture in the sintering raw material to a target moisture in the sintering equipment provided with a mixer 5 having a water pouring function, in the upstream side of the mixer, the moisture value in the sintering raw material is measured for each description with an absolute dry type moisture meters 2a-2e and the forward-control of the water pouring quantity in the mixer is executed based on these measured values, and in the downstream side of the mixer, the moisture value in the sintering raw material mixed in the mixer, is measured with an infrared moisture meter 13, and the feedback-control of the water pouring quantity in the mixer is executed based on this measured value. At this time, it is desirable to execute the moisture measurement with the absolute dry type moisture meter at the frequency of one time per 2 hr and to take >=80 g per one time of the analyzing sample wt. for the absolute dry type moisture meter and to execute the feedback-control at the interval of 15-30 min.

63. 发明专利

JP2000178659A PRODUCTION OF HIGH QUALITY LOW SiO2 SINTERED ORE 失效
公开(公告)号：JP2000178659A
公开(公告)日：2000-06-27
申请号：JP35308198
申请日：1998-12-11
申请人： NIPPON KOKAN KK
发明人： NODA HIDETOSHI , MUTSUKAWA SHOICHI , ICHIKAWA KOICHI , SAKAMOTO NOBORU , SATO HIDEAKI , WATANABE TAKASHI , HASHIMOTO TAKESHI
IPC分类号： C22B1/16
摘要： PROBLEM TO BE SOLVED: To provide a producing method of sintered ore excellent in reducibility, reduced powdering property and high temp. characteristics, with which the component adjustment of MgO in slag in the operation of a blast surface is unnecessary and SiO2 content in the sintered ore is lowered to 4.6% without lowering the producing ratio and the yield in the sintering process. SOLUTION: In the production of the sintered ore for blast furnace, having 0.5% MgO in the product, as the MgO source, magnesite 5 and/or brucite 6 are used without using either of SiO2.MgO base auxiliary raw material such as serpentine or CaO.MgO auxiliary raw material such as dolomite, to adjust the slag component composition in the sintered ore product. The sintered ore excellent in the reducibility and reduced powdering property can stably be produced in the high production ratio and the high yield, and the fuel ratio and the slag ratio in the blast furnace are reduced and the blasting operation of high ratio of pulverized fine coal can be attained.

64. 发明专利

JP2000046475A PALLET TRUCK FOR SINTERING MACHINE 失效
公开(公告)号：JP2000046475A
公开(公告)日：2000-02-18
申请号：JP21233098
申请日：1998-07-28
申请人： NIPPON KOKAN KK
发明人： YAMAUCHI HIDETOSHI , SATO HIDEAKI
IPC分类号： F27B21/08
摘要： PROBLEM TO BE SOLVED: To eliminate preceding excess of sintering by averaging an air volume distribution of a charged raw material layer. SOLUTION: A baffle plate 11 is vertically provided from below a fire grate 2 near a sidewall side frame 4a in a suction chamber B of a pallet 6. Further, an oblique plate 12 is obliquely provided from the frame 4a toward its inside. The frame 4a of the chamber B has a step, and a width of a lower end of the chamber B is shorter than that of a mount of the grate at a lower end of a charging chamber A. A longitudinal side frame of a pallet connector of the chamber B is provided obliquely toward an inside of the chamber B. A resistance is given to a flow of the air in the chamber B flowing from four sides of the chamber B toward a central direction, and hence a raw material in the chamber A is suppressed at an excess wind speed so that preceding excess of sintering is eliminated. Further, wear of the pallet is prevented.

65. 发明专利

JP2947041B2 失效
公开(公告)号：JP2947041B2
公开(公告)日：1999-09-13
申请号：JP33333493
申请日：1993-12-27
申请人： NIPPON KOKAN KK
发明人： SHIMIZU MASAYASU , NODA HIDETOSHI , TAKAI TSUTOMU , SATO HIDEAKI , KOMATSU OSAMU
IPC分类号： F27B21/10

66. 发明专利

JPH11172340A PRODUCTION OF LOW SILICA SINTERED ORE 失效
公开(公告)号：JPH11172340A
公开(公告)日：1999-06-29
申请号：JP34600097
申请日：1997-12-16
申请人： NIPPON KOKAN KK
发明人： SATO HIDEAKI , WATANABE TAKASHI , SAKAMOTO NOBORU , NODA HIDETOSHI , ICHIKAWA KOICHI , MUTSUKAWA SHOICHI
IPC分类号： C22B1/16
摘要： PROBLEM TO BE SOLVED: To produce the sintered ore of

67. 发明专利

JPH11108563A METHOD FOR REGULATING PRESSURE IN IGNITION FURNACE OF SINTERING MACHINE, AND ITS DEVICE 失效
公开(公告)号：JPH11108563A
公开(公告)日：1999-04-23
申请号：JP27535497
申请日：1997-10-08
申请人： NIPPON KOKAN KK
发明人： SATO HIDEAKI , WATANABE TAKASHI
IPC分类号： F27B21/08 , F27B21/14
摘要： PROBLEM TO BE SOLVED: To maintain the pressure inside an ignition furnace in a preferable range by providing a diameter reduction part on communication pipes to communicate a drop powder recovery pipe below the ignition furnace with a downcomer adjacent to the ore-discharge side, and regulating the pressure inside the ignition furnace by a valve and the diameter reduction part. SOLUTION: A pair of communication pipes 6-3 are provided between a drop powder recovery pipe 13 below an ignition furnace 9 and a downcomer 3, and a valve 7-3 and an orifice 15 as a diameter reduction part are provided on the communication pipes 6-3. The gas containing the gas generated through the combustion of powder cokes on a raw material upper layer part ignited in the ignition furnace 9 is sucked to a duct 5 through the downcomer 3 via a wind box 2-3, a drop powder recovery pipe 13a, the communication pipes 6-3, the orifice 15, and the valve 7-3. The pressure inside the ignition furnace 9 is regulated by the valve 7-3 and the orifice 15. The pressure inside the ignition furnace 9 can be maintained for a long time in an excellent range.

68. 发明专利

JPH1161282A MANUFACTURE OF SINTERED ORE 失效
公开(公告)号：JPH1161282A
公开(公告)日：1999-03-05
申请号：JP22145697
申请日：1997-08-18
申请人： NIPPON KOKAN KK
发明人： ICHIKAWA KOICHI , NODA HIDETOSHI , SAKAMOTO NOBORU , SATO HIDEAKI , WATANABE TAKASHI
IPC分类号： C22B1/16
摘要： PROBLEM TO BE SOLVED: To provide the manufacturing method wherein the SiO2 composition necessary for increasing the ratio of the sintered ore in the raw material to be charged in a blast furnace is small, the reduction degradation characteristic is excellent, and the sintered ore of high strength can be manufactured in high yield. SOLUTION: The raw material for sintering blended so that grains of =30 wt.% and the SiO2 concentration of the sintered ore is 2.8-4.7 wt.%, is mixed and granulated by a high-speed stirring mixing machine 3, and the fuel component is added thereto, and the mixture is sintered after granulated again. After the raw material is mixed and granulated by the high-speed stirring and mixing machine by the above method, and then, granulated using a rotation type granlator 5, the fuel component may be added and the mixture may be sintered after granulated again.

69. 发明专利

JPH1072626A METHOD FOR CONTROLLING BASICITY OF SINTERED ORE 失效
公开(公告)号：JPH1072626A
公开(公告)日：1998-03-17
申请号：JP23034096
申请日：1996-08-30
申请人： NIPPON KOKAN KK
发明人： SATO HIDEAKI , SOU SHIYUUKIYOU
IPC分类号： C22B1/16
摘要： PROBLEM TO BE SOLVED: To quickly, accurately and automatically adjust the basicity of a product sintered ore to a target value by measuring the contents of SiO2 and CaO in the product sintered ore, obtaining the basicity, deciding an evaluation point from the difference between the measured value and the target value and automatically correcting a CaO blending ratio. SOLUTION: Each of contents of SiO2 and CaO in the product sintered ore in a sintered ore producing process is measured every prescribed period, and the basicity (CaO/SiO2 ) is obtd. from these measured values, and a range distributed with the deviations obtained by subtracting the measured value from the target value, is divided into plural sections. An evaluation point according to a deviation range in a section is set in the each section, and an evaluation point table for the evaluation points is beforehand prepared. On the other hand, the content of SiO2 and that of CaO in the product sintered ore in a sintered ore producing operation is measured in time sequenrially and the basicity is obtd. from the measured values of these contents at this time, and the deviation from the target value is obtd. The section of the deviation range, to which this deviation belongs, is obtd. from the evaluation point table, and the evaluation point corresponding to this section is imparted to the basicity, and by this method, the raw material blending ratio of the CaO source is automatically corrected to adjust the basicity of the product sintered ore.

70. 发明专利

JPH09286488A ELIMINATION OF BRIDGING IN POWDER/GRANULE HOPPER 失效
公开(公告)号：JPH09286488A
公开(公告)日：1997-11-04
申请号：JP9394696
申请日：1996-04-16
申请人： NIPPON KOKAN KK
发明人： SATO HIDEAKI , YAMAMOTO HIROSHI , FUJIWARA YOSHINORI
IPC分类号： B65D88/26 , B65D88/70 , B65G65/42
摘要： PROBLEM TO BE SOLVED: To provide a method for clearing a powder/granule hopper of bridging, which enables avoiding an error in compounding or suspension in operation, caused by bridging in the hopper, at low cost of equipment. SOLUTION: A powder/granule hopper 3 has in the inside surface in the vicinity of a spot susceptible to bridging a plurality of injection pipes 14a, 14b, through which a high-pressure gas is injected, arranged at certain intervals vertically and at an angle of 70 deg. to 120 deg. between adjacent injection pipes in circular direction of the hopper. When the load factor on a belt feeder 4 for dispensing powder/grains at a constant quantity falls below a lower limit, from two injection pipes 14a, 14b referred to above the high-pressure gas is injected in a sudden blowout so as to eliminate the bridging.

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