专利快速检索-快速检索全球专利，免费商用专利数据库-IPRDB

71. 发明专利

JPS6317265A REFRACTORIES FOR BLAST FURNACE CAST BED DESILICATING LAUNDER 失效
公开(公告)号：JPS6317265A
公开(公告)日：1988-01-25
申请号：JP16077086
申请日：1986-07-10
申请人： NIPPON KOKAN KK , TAIKO REFRACTORIES
发明人： NISHI MASAAKI , NUMATA AKIMOTO , NAKAJIMA RYUICHI , SUMIKAMA TAKASHI , IWASAKI ITSUTOSHI , HASHIGUCHI SOICHI
IPC分类号： C04B35/101 , C04B35/10 , C04B35/66 , C21B7/14

72. 发明专利

JPS61149411A METHOD FOR OPERATING BLAST FURNACE 失效
公开(公告)号：JPS61149411A
公开(公告)日：1986-07-08
申请号：JP27100384
申请日：1984-12-24
申请人： NIPPON KOKAN KK
发明人： INOUE HIDEAKI , SAKAI ATSUSHI , NAKAJIMA RYUICHI
IPC分类号： C21B5/00 , C21B7/10 , C21B7/24
摘要： PURPOSE:To exchange systematically a tuyere of a blast furnace when the furnace is operated by blowing powder from the tuyere, by embedding thermometers in the tip of the tuyere and detecting the friction state of the tuyere from the indicated values so as to find the danger of damage of the tuyere in the early stage. CONSTITUTION:Thermometers 11 are embedded in the tip of a tuyere 1 of a blast furnace at several positions close to a cooling water hat 8 in the form of a ring. Temps. Ti indicated by the thermometers 11 are continuously compared with a set temp. To, and in case of Ti>To, the blowing of powder is automatically stopped. Thus, the rate of operation of the blast furnace by the blowing of powder is increased and the blowing efficiency is also increased.

73. 发明专利

JP2536209B2 失效
公开(公告)号：JP2536209B2
公开(公告)日：1996-09-18
申请号：JP2215390
申请日：1990-02-02
申请人： NIPPON KOKAN KK
发明人： NAKAJIMA RYUICHI , HASEBE SHINJI , FUNABIKI YOSHIHIRO , MATSUMURA SUSUMU , OOSHIMA YOSHIHIRO , SUZUKI YOSHIO
IPC分类号： E02B3/14 , C10B57/04 , C10B57/06 , E02D17/20

74. 发明专利

JPH0551618A DESILICONIZING METHOD FOR MOLTEN IRON 失效
公开(公告)号：JPH0551618A
公开(公告)日：1993-03-02
申请号：JP20674691
申请日：1991-08-19
申请人： NIPPON KOKAN KK
发明人： NAKAJIMA RYUICHI , HATTORI MICHINORI , ISHII KUNIHIKO
IPC分类号： C21C1/04
摘要： PURPOSE:To improve the desiliconizing oxygen efficiency in desiliconization of molten iron and to suppress slag forming. CONSTITUTION:A pressure cap 4 is mounted in the aperture of a molten iron ladle 2 after the molten iron is received in the molten iron ladle. A desiliconizer blowing lance 7 and a pressure air blowing pipe 5 are inserted into the molten iron ladle through a pressure cap 4 and the pressure air is blown from a pressure blowing pipe 5 into a space 6 under the pressure cap to attain the prescribed pressure (the atmospheric pressure at which a decarburization reaction cannot arise in the range of molten iron temp. ; for example, 2 atm. pressure). The lance 7 is inserted into the molten iron 3 and the desiliconizer is blown together with a carrier gas to desiliconize the molten iron. The pressure regulation is executed by a pressure regulating valve 9 provided in the mid-way of the pressurized air blowing pipe 5. The desiliconizing oxygen efficiency is improved and the amt. of the molten iron to be received in the molten iron ladle is increased in this way.

75. 发明专利

JPH0533023A APPARATUS FOR MANAGING BLAST FURNACE GAS 失效
公开(公告)号：JPH0533023A
公开(公告)日：1993-02-09
申请号：JP18976191
申请日：1991-07-30
申请人： NIPPON KOKAN KK
发明人： ITO HARUO , HATTORI NAOKI , NAKAJIMA RYUICHI
IPC分类号： C21B5/00 , F27B1/26 , F27D17/00
摘要： PURPOSE:To most efficiently use blast furnace gas while always grasping quantity balance between generating quantity of the blast furnace gas and the used side of this gas. CONSTITUTION:This managing apparatus is provided with a means 11 for detecting the generating quantity of blast furnace gas, means 31, 41, 51 for detecting the consumption of blast furnace gas in the devices for using the blast furnace gas and a control device 60 for detecting the difference between the generating quantity of blast furnace gas and the consumption of blast furnace gas connected to both means and adjusting the generating quantity of blast furnace gas and the consumption of blast furnace gas.

76. 发明专利

JPH059532A DESILICONIZING TREATMENT DEVICE IN HEARTH 失效
公开(公告)号：JPH059532A
公开(公告)日：1993-01-19
申请号：JP15903891
申请日：1991-06-28
申请人： NIPPON KOKAN KK
发明人： NAKAJIMA RYUICHI , HATTORI MICHINORI , FURUYA SHIGEKI
IPC分类号： C21C1/04
摘要： PURPOSE:To execute desiliconizing treatment in a hearth with good responsiveness by calculating the injecting quantity of a desiliconizing agent from a deviation value between Si content in the tapped iron measured in the actual time and aimed Si content and injecting the desiliconizing agent into the molten iron base on it. CONSTITUTION:In a desiliconizing layer 10, the Si content in the tapped iron is measured with a Si sensor 40 in a real time. This measured Si value is inputted into an arithmetic control unit 100 and compared with the aimed Si value. Based on the deviation value, the charging quantity of desiliconizing agent is calculated at this time. Based on this calculated value and molten iron receiving speed, etc., the desiliconizing agent injecting speed is set with an injecting rate controller 108. By the signal from there, a fluidized value 72 in an injection tank 70 is controlled and the prescribed quantity of desiliconizing agent is injected into the molten iron in the desiliconizing layer 10 through an injecting lance 50. By this method, the Si content in the tapped iron is quickly detected, and high accurate desiliconizing treatment on the casting floor is executed in the short time, and also even if foaming caused, the lack of injecting quantity of desiliconizing agent is not caused.

77. 发明专利

JPH04308012A METHOD AND DEVICE FOR CHARGING RAW MATERIAL IN BLAST FURNACE 失效
公开(公告)号：JPH04308012A
公开(公告)日：1992-10-30
申请号：JP7074191
申请日：1991-04-03
申请人： NIPPON KOKAN KK
发明人： NAKAJIMA RYUICHI , SHIMOMURA AKIO , HATTORI MICHINORI
IPC分类号： C21B5/00 , C21B7/20
摘要： PURPOSE:To freely control the distribution of charging raw materials, etc., without overflowing them from a swing chute even if the swing chute in a belless blast furnace directs just downward. CONSTITUTION:The raw materials 8, etc., are charged into the whole range of charging position from the outer peripheral part to the center part in a furnace with cylindrical type, etc., of the swing chute 4. As the swing chute 4 can be used in the optional inclination and the distribution of raw materials, 8, etc., can be thickened, the raw material layer having good ventilation control, etc., can be formed.

78. 发明专利

JPH03232911A PRESSURE DETECTING TERMINAL IN SHAFT PART OF BLAST FURNACE 失效
公开(公告)号：JPH03232911A
公开(公告)日：1991-10-16
申请号：JP3053390
申请日：1990-02-09
申请人： NIPPON KOKAN KK
发明人： NAKAJIMA RYUICHI , KISHIMOTO SUMIYUKI , KIMURA KOICHI
IPC分类号： C21B5/00 , C21B7/24
摘要： PURPOSE:To develop a sensor being fit for use for a long period of time without developing thermal deformation and clogging at tip part of the sensor by fitting a porcelain tube at tip part of furnace inner side of the sensor for measuring pressure in a blast furnace. CONSTITUTION:In a shaft part of the blast furnace, plural pieces of measuring holes 3 are bored at plural steps in height direction and in circular direction of each height position, and the steel pipe-made sensor 5 for measuring the pressure is fitted therein to detect gas pressure in the furnace by balancing N2 gas pressure supplied from a detecting pipe 7 with the gaseous pressure flowing from inner part of the furnace. In this case, the range (a) of about 300mm at the tip part of the furnace inner side of sensor 5 is made of the porcelain tube 4 formed with castable of chamotte series monolithic refractory. The sensor 5 can be used to detect the gaseous pressure in the furnace over long time without deforming and clogging of the tip part thereof caused by high temp. in the furnace.

79. 发明专利

JPH03229808A METHOD FOR CHARGING RAW MATERIAL INTO BELL-LESS BLAST FURNACE 失效
公开(公告)号：JPH03229808A
公开(公告)日：1991-10-11
申请号：JP2585490
申请日：1990-02-05
申请人： NIPPON KOKAN KK
发明人： NAKAJIMA RYUICHI , KISHIMOTO SUMIYUKI , SHIMOMURA AKIO , KIMURA KOICHI
IPC分类号： C21B5/00 , C21B7/00
摘要： PURPOSE:To shorten charging interval of raw material and to enable increase of production in a blast furnace by deciding the discharging timing of raw material in a raw material charging hopper in the blast furnace corresponding to the number of swinging times of distributing chute in the blast furnace. CONSTITUTION:Coke and ore are shifted to hoppers 3, 6 from vessels 1, 4 with belt conveyors 2, 5, respectively and weighed. These raw materials are conveyed into upper hopper 9 in the blast furnace 8 with a belt conveyor 7 and discharged to a lower hopper 12 through an upper gate valve 10 and upper seal valve 11. The raw material in the lower hopper 12 is discharged into the distributing chute 15 through a raw material control gate 13 and lower seal valve 14 and uniformly distributed at the furnace top in the blast furnace while swinging the distributing chute. Then, by deciding the discharging timing of raw material in the raw material charging hopper in the blast furnace corresponding to the number of swigging times of the distributing chute 15, in the case the number of swinging times of the distributing chute 15 decreases from 15 times at max. to 12 times, the time schedule can be shortened without developing the waiting time.

80. 发明专利

JPH03228919A MANUFACTURE OF COKE 失效
公开(公告)号：JPH03228919A
公开(公告)日：1991-10-09
申请号：JP2215390
申请日：1990-02-02
申请人： NIPPON KOKAN KK
发明人： NAKAJIMA RYUICHI , HASEBE SHINJI , FUNABIKI YOSHIHIRO , MATSUMURA SUSUMU , OSHIMA YOSHIHIRO , SUZUKI YOSHIO
IPC分类号： E02B3/14 , C10B57/04 , C10B57/06 , E02D17/20
摘要： PURPOSE:To increase grain size of the coke by selecting coal having a small difference between the expansibility of the coal alone intended as a raw material for coke and another expansibility with an addition of an inert material thereto, and combining the aforesaid coal with the inert material. CONSTITUTION:A coal sample 1 in a powder state is pulverized into grains of 100 meshes or less. A porous container 6 is filled with the grains and placed in an electric furnace 3. The electric furnace 3 is heated under pressure with a metal piston 4, and the expansion coefficient of the sample 1 is calculated. Then, an inert material (pulverized coke or the like) is added to the sample 1 and similarly subjected to an expansion test. Thereafter, coal having a small difference of expansibility from an index for softened fusion characteristics in a carbonizing condition in a coke furnace during a carbonizing process, is selected and combined with the inner material, thereby obtaining a raw material for coke. Consequently, the grain size of the coke can be increased.

你已经成功收藏专利！

检索式保存成功!

IPRDB

热门服务

关于我们

友情链接

联系方式