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1. 发明专利

JP2000273512A DEMOLISHING MACHINE OF IRON TAPPING RUNNER FOR BLAST FURNACE 失效
公开(公告)号：JP2000273512A
公开(公告)日：2000-10-03
申请号：JP7472999
申请日：1999-03-19
申请人： NIPPON STEEL CORP , NITTETSU PLANT DESIGNING CORP , MITSUI MIIKE MACHINERY CO LTD
发明人： ANABUKI YUKITAKA , KISHIKAWA NAOTO , TONO IKUO , NAKAYAMA TAKASHI , YAMADA SUMIO , KASHIWAMURA NORIOMI , MATSUO KENJI
IPC分类号： B22D35/00 , C21B7/14 , F27D1/16
摘要： PROBLEM TO BE SOLVED: To easily repair for early time by surely executing the crushing and the digging of deteriorated portion in a refractory in an iron tapping runner for blast furnace in high temp. state. SOLUTION: A water spraying nozzle 36 for spraying the cooling water toward a cutting edge 33 is disposed to a digging tool 26 and the wear of the cutting edge 33 is reduced by lightening the thermal effect to the cutting edge and also, the refractory is forcibly cooled. On the other hand, steam generated from the water is blown off with the air spouted from an air spouting hole 46 and the working environment is improved and visibility for watching the digging tool 26 is secured, and the control of posture and position can easily and surely be executed.

2. 发明专利

JP2000337778A APPARATUS AND METHOD FOR HOT MAINTENANCE OF MOLTEN METAL CONTAINER 失效
公开(公告)号：JP2000337778A
公开(公告)日：2000-12-08
申请号：JP14590599
申请日：1999-05-26
申请人： NIPPON STEEL CORP , NITTETSU PLANT DESIGNING CORP
发明人： UCHIDA TAKAYUKI , MIKAMI YORIYOSHI , TONO IKUO , NAKAYAMA TAKASHI , MAKINOSUMI SHINAN , KISHIKAWA NAOTO
IPC分类号： F27D1/16
摘要： PROBLEM TO BE SOLVED: To shorten the monolithic refractory maintenance work of a molten metal container, reduce the monolithic refractory using amount, make an appara tus adaptable to maintenance under a hot condition, and to prolong of monolith ic refractories. SOLUTION: The apparatus for hot maintenance of a molten metal container comprises a disassembling device having a rotary drum 3 having a comminuting type cutting blade, a positioning means disposing the drum 3 in the container (tundish) 8 and movable or tiltable in a vertical direction and/or a width direction of the container 8 and a controller for holding a pressing force during excavating of the drum 3 constant. The apparatus also comprises a repairing device having a blowing nozzle 11 for blowing monolithic refractories, a positioning means disposing the nozzle 11 in the container 8 and movable or tiltable in a vertical direction and/or a width direction of the container, and a controller for maintaining blowing width and height positions of the nozzle 11 constant.

3. 发明专利

JP2000205760A BLAST FURNACE GUTTER REFRACTORY MATERIAL DEMOLISHING DEVICE 失效
公开(公告)号：JP2000205760A
公开(公告)日：2000-07-28
申请号：JP232999
申请日：1999-01-07
申请人： NIPPON STEEL CORP , NITTETSU PLANT DESIGNING CORP
发明人： ANABUKI YUKITAKA , KISHIKAWA NAOTO , TONO IKUO , NAKAYAMA TAKASHI , UCHIDA TAKAYUKI
IPC分类号： C21B7/06 , F27D1/16
摘要： PROBLEM TO BE SOLVED: To eliminate a side slip by the drilling repulsion force, and restrictions in the outer shape dimensions and the weight or the like of a gutter refractory material depomishing machine by arranging a gutter refractory material demolishing machine main body wherein a rotary drilling unit is attached at the boom tip end section of a crawler belt running truck, and a side slip preventive metal fitting of the demolishing machine crawler belt, on the upper surface, and also, combining a lay base having a stepping face, of which the span is wider than the span of the demolishing machine crawler belt. SOLUTION: This gutter refractory material demolishing device is constituted of a lay base 22 wherein a side slip preventive metal fitting 20 to prevent a crawler belt 13 from slipping a sideways is arranged on the upper surface, and also, a grounding surface plate 21 with a cast bed 15 is arranged on the lower surface; and a gutter refractory material demolishing machine 23. Then, the gutter refractory material demolishing machine 23 is arranged on the lay base 22 which is set on the cast bed 15, and a drilling drum 4 is pressed to a gutter refractory material 9 under a state wherein the side slip is prevented from occurring by the side slip preventive metal fitting 20, and the gutter refractory material 9 of an iron spout 8 is drilled and demolished. In this case, by making the span of the grounding plate 21 larger than the span of the crawler belt 13, a rotary friction holding moment between the lay base 22 and the cast bed 15 is increased, and a side slip between them is surely prevented from occurring.

4. 发明专利

JP2004307966A Method for operating blast furnace 有权
标题翻译：操作BLAST FURNACE的方法
公开(公告)号：JP2004307966A
公开(公告)日：2004-11-04
申请号：JP2003105447
申请日：2003-04-09
申请人： Nippon Steel Corp , 新日本製鐵株式会社
发明人： ORIMOTO TAKASHI , MATSUZAKI SHINROKU , NAITO MASAAKI , NOMURA SEIJI , NAKAYAMA TAKASHI , AYUKAWA SUKEYUKI , MATSUOKA YOSHIYUKI , KOIZUMI SATOSHI , OGATA RIYOUSHIN , SUZUKI YUTAKA , HATANAKA ASAO , ISOBE MAKOTO , YAMAGUCHI KOICHI , NAKAJIMA YOSHIAKI
IPC分类号： C21B5/02 , C21B5/00
摘要： PROBLEM TO BE SOLVED: To provide a method for operating a blast furnace by which the Si content in molten iron is reduced by charging coke having low activity of SiO
2 in the ash content from the furnace top.
SOLUTION: In the method for operating the blast furnace where iron ore, coke and auxiliary raw material are charged from the furnace top, the coke having low activity of SiO
2 in the ash content is charged from the furnace top to reduce the Si concentration in the molten iron.
COPYRIGHT: (C)2005,JPO&NCIPI
摘要翻译：要解决的问题：提供一种操作高炉的方法，通过在来自炉子的灰分中加入具有低活性SiO 2 SB的活性的焦炭来降低铁水中的Si含量最佳。
解决方案：在炉顶装有铁矿石，焦炭和辅助原料的高炉操作方法中，将灰分中具有低SiO 2 SB / 2 SB活性的焦炭装入从炉顶降低铁水中的Si浓度。版权所有（C）2005，JPO＆NCIPI

5. 发明专利

JPH08282817A BELT REVERSING METHOD AND ITS DEVICE 失效
公开(公告)号：JPH08282817A
公开(公告)日：1996-10-29
申请号：JP11242895
申请日：1995-04-12
申请人： HAMADA JUKO , NIPPON STEEL CORP
发明人： ISOMURA NORIHISA , IIMORI NOBUTAKA , KOJIMA YOSHIHIRO , MORI HAJIME , NAKAYAMA TAKASHI
IPC分类号： B65G15/08 , B65G39/16
摘要： PURPOSE: To provide a belt reversing method and its device capable of not allowing an endless belt, even it is deteriorated with age, to bite into a gap between guide rollers, reducing guide roller damages caused by extraneous matters stuck to the belt, reducing extraneous matters stuck to the be belt falling on the floor, extending the life of the belt reversing device and the belt, and shortening the reversing distance. CONSTITUTION: With regard to a belt reversing method by which the return belt 13a of an endless belt 13 rotating on a belt conveyor 14 is reversed as bindingly guiding it in a helical cylindrical shape by a belt reversing device 10A arranged near a head pulley 11, and thereafter, making it rotate normally as bindingly guiding it in a helical cylinderical shape, both ends 13b of the return belt 13a are inserted into the inserting side of the belt reversing device 10A with both ends trued up downwards. Both ends of the reversed return belt 13a is inserted into the inserting side of a belt reversing device 10B with both ends trued up upwards.

6. 发明专利

JPH04297510A METHOD FOR OPERATING BLAST FURNACE 失效
公开(公告)号：JPH04297510A
公开(公告)日：1992-10-21
申请号：JP6326191
申请日：1991-03-27
申请人： NIPPON STEEL CORP
发明人： ICHIDA MORIMASA , NAKAYAMA TAKASHI , TAMURA KENJI
IPC分类号： C21B5/00 , C21B7/24
摘要： PURPOSE:To prevent lowering of gas flowing speed at a center part in a blast furnace by burning and removing deposited powder on the center part of the top of a charged layer by blowing oxygen, etc. CONSTITUTION:When gas temp. at the center part changed in a positive correlation with the gas flowing speed at the canter part is lowered and the furnace load in a shaft part is increased blow attending on the unfavorable condition of burden-down (slipping, etc.) is developed at the same time. A pipe 1 connected with a suction device 2 is inserted into the furnace and has a driving type which can freely be driven on the surface of charged material. By sucking and removing the deposited powder present on the center part in the layer top with this pipe 1, or by burning and removing it with the oxygen, etc., the gas temp. at the center part is raised and heat load of the furnace body in the shaft part is reduced.

7. 发明专利

JPH0813011A OPERATION OF BLAST FURNACE 失效
公开(公告)号：JPH0813011A
公开(公告)日：1996-01-16
申请号：JP16999994
申请日：1994-06-28
申请人： NIPPON STEEL CORP
发明人： NAKAYAMA TAKASHI , NAITO MASAAKI
IPC分类号： C21B5/00
摘要： PURPOSE:To stabilize a blast furnace operation and improve the production flexibility by mixing carbon-containing iron having a specific particle size and carbon content at a specific ratio to the iron raw material and charging. CONSTITUTION:In the blast furnace operation, the iron raw material of iron ore sintered ore, etc., and coke are alternately charged and operated while blowing pulverized coal from a tuyere. In this case, at the time of mixing the ore 11 and the carbon-containing iron 12 and charging into the furnace, the carbon-containing iron 12 preceded to the ore 11 is melted down and void ratio of the ore layer 10 is increased to improve the permeability, and the contacting area between the reducing gas and the ore is increased to improve the ultimate reduction ratio of the ore. Then, the carbon-containing iron is made to be 3-50mm particle size and 0.5-5wt.% carbon content and mixed at 1.0-6.5wt.% to the iron raw material. By this method, the difference between the starting temp. of melting and the starting temp. of dripping of the ore can be reduced and the thickness of fused zone can easily be thinned.

8. 发明专利

JPH06256818A OPERATION OF BLAST FURNACE 失效
公开(公告)号：JPH06256818A
公开(公告)日：1994-09-13
申请号：JP6478793
申请日：1993-03-02
申请人： NIPPON STEEL CORP
发明人： INOUE YOSHIHIRO , NAKAYAMA TAKASHI , TAKAO MASAYOSHI
IPC分类号： C21B5/00
摘要： PURPOSE:To stabilize the furnace condition in a blast furnace and to reduce fuel ratio by adjusting component ratio of FeO to Al2O3 in a sintered ore charged into the blast furnace, slag ratio of charged material into the blast furnace and moisture in hot last and making the reduction ratio of an iron ore suitably. CONSTITUTION:The reduction ratio of the sintered ore, bulky ore, pellet, etc., during dropping the furnace body part in the blast furnace is obtd. as the average value in the radial direction. Based on this reduction ratio, one or more items among the component ratio of FeO to Al2O3 in the sintered ore charged into the blast furnace, the slag ratio of the charged material into the blast furnace and the moisture in the hot blast blown from a tuyere in the blast furnace are adjusted to keep the reduction ratio of the iron ore to >=50%. By this method, the ventilation at the lower part of the furnace is improved and the sudden increase of direct reduction is prevented and the furnace condition is made to be desirable, and the stable operation for long term can be achieved.

9. 发明专利

JPH04301013A METHOD FOR OPERATING BLAST FURNACE 失效
公开(公告)号：JPH04301013A
公开(公告)日：1992-10-23
申请号：JP6488891
申请日：1991-03-28
申请人： NIPPON STEEL CORP
发明人： ICHIDA MORIMASA , SHIODA HARUYOSHI , NAKAYAMA TAKASHI , TAMURA KENJI
IPC分类号： C21B5/00
摘要： PURPOSE:To secure gas flow velocity at the central part and to stabilize a blast furnace operation by lowering the actual gas flow velocity with water spraying, etc., at a furnace top and reducing powder ascending to the furnace top in the case of detecting the presence of deposited powder at the central part of the layer top in the blast furnace. CONSTITUTION:At the time of operating the blast furance, the layer top surface of the charged material is observed from the furnace top. By this method, in the case of detecting the presence of the deposited powder at the central part of layer top, the actual gas flow velocity in the vicinity of the furnace top is reduced. This lowering of the flow velocity can be executed by lowering furnace top temp. with the water spraying at the furnace top or raising of moisture in charged coke or ore. By this method, the blow-up powder to the furnace top is retained in the charged material layer and reduced, whereby the gas flow velocity at the central part is secured to make gas flow velocity distribution having higher gas flow velocity at the central part and variation in the gas-flow velocity and the generation of slipping are prevented and furnace condition is stabilized and the operation in a low fuel ratio and a high iron tapping ratio can be efficiently available.

10. 发明专利

JPH0978111A OPERATION OF BLAST FURNACE 失效
公开(公告)号：JPH0978111A
公开(公告)日：1997-03-25
申请号：JP25946695
申请日：1995-09-13
申请人： NIPPON STEEL CORP
发明人： KAWAMURA TAKUSHI , INOUE YOSHIHIRO , MATSUOKA YOSHIYUKI , MATSUZAKI SHINROKU , NAKAYAMA TAKASHI
IPC分类号： C21B5/00
摘要： PROBLEM TO BE SOLVED: To prevent the fluidization of charged material charged into a blast furnace and to achieve the stable operation by obtaining starting velocity of the fluidization of the charged material in the furnace in each charging butch and gas flowing speed distribution in the furnace and maintaining so that the starting speed of fluidization becomes higher than the gas flowing speed. SOLUTION: At the time of charging the charging material from the furnace top of the blast furnace by dividing into plural times, sampling is executed in a fixed period or when the condition of charging material varies. Grain size distribution and density distribution of the charged material are measured, and based on these, the starting speed of fluidization umf of the charged material is obtd. At the same time, the gas flowing speed distribution ug in the furnace diameter direction is measured, and at least one of the grain size distribution and density distribution of charged material, charged material distribution and hot blast quantity blown from tuyeres of the blast furnace is adjusted. The operation is executed while maintaining so that the starting speed of fluidization umf is higher than the gas flowing speed ug in the furnace. By this method, the stable blast furnace operation is continuously executed in a low fuel ratio.

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