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1. 发明公开

EP1439236A4 METHOD FOR DRYING MOLDING CONTAINING OXIDIZED METAL, METHOD FOR REDUCING OXIDIZED METAL AND ROTARY HEARTH TYPE METAL REDUCTION FURNACE 有权
标题翻译：用于干燥的氧化的金属法在包含成型体，一种用于减少氧化的金属与旋转炉床还原炉METAL
公开(公告)号：EP1439236A4
公开(公告)日：2008-09-03
申请号：EP02708751
申请日：2002-04-01
申请人： NIPPON STEEL CORP
发明人： IBARAKI TETSUHARU , YAMAMOTO TAKASHI , ABE YOICHI , TAKAHASHI SHIGEKI , NAGAI KAZUNORI
IPC分类号： C21B13/10 , C21B13/00 , C22B1/24 , C22B1/245 , F27B9/16 , F27B9/36 , F27D19/00 , F27D21/00
CPC分类号： F27B9/16 , C21B13/0046 , C21B13/105 , C22B1/24 , C22B1/245 , F27B9/36 , F27D19/00 , F27D21/0014 , Y02P10/136
摘要： The present invention provides: a method for drying compacts containing water so as not to cause explosion and powdering; a method for reducing the compacts after being dried with great efficiency in a rotary-hearth-type reducing furnace; and a rotary-hearth-type metal reducing furnace. In the present invention, when compacts comprising powder containing metal oxide and carbon are dried, the critical value of a water evaporation rate, beyond which explosion occurs, is determined from the size and porosity of the compacts, then the water evaporation rate is controlled to a value not exceeding the critical value and, by so doing, the increase in the internal pressure of the compacts caused by the generation of water vapor is prevented. By the method, the explosion and cracking of the compacts are prevented. Further, when compacts are dried in a rotary-hearth-type reducing furnace, explosion is prevented by controlling the heat supply rate to the compacts through the above method and successively the compacts are incinerated and reduced in the same furnace.

2. 发明专利

BR9604885A 未知
公开(公告)号：BR9604885A
公开(公告)日：1998-05-19
申请号：BR9604885
申请日：1996-08-26
申请人： NIPPON STEEL CORP
发明人： WAKI KOUICHI , WAKABAYASHI HISAMOTO , SHIBUYA TATSURU , SAKURAI KOICHI , SUGIYAMA SEIJI , NAGAI KAZUNORI
IPC分类号： C21D9/56 , C21D1/613 , C21D9/573
摘要： PCT No. PCT/JP96/02387 Sec. 371 Date Aug. 6, 1997 Sec. 102(e) Date Aug. 6, 1997 PCT Filed Aug. 26, 1996 PCT Pub. No. WO97/24468 PCT Pub. Date Jul. 10, 1997In a method of continuously annealing steel strip comprising a heating step (A), a soaking step (B), a primary cooling step (C) including a rapid cooling step at least in a second half thereof, an overaging step (D), and a final cooling step (E), inert atmosphere gas containing H2 gas in the concentration of 30-60% is employed as cooling gas for use in the rapid cooling step, the blowoff temperature of the cooling gas is 30 DEG -150 DEG C., and the blowoff speed of the cooling gas is 100-150 m/sec. The primary cooling method in continuously annealing steel strip provides the primary cooling step (C) including the rapid cooling step which can be carried out with a high efficiency and a low cost.

3. 发明专利

DE69611033T2 未知
公开(公告)号：DE69611033T2
公开(公告)日：2001-07-19
申请号：DE69611033
申请日：1996-08-26
申请人： NIPPON STEEL CORP
发明人： SAKURAI KOICHI , SHIBUYA TATSURU , WAKABAYASHI HISAMOTO , WAKI KOUICHI , SUGIYAMA SEIJI , NAGAI KAZUNORI
IPC分类号： C21D9/56 , C21D1/613 , C21D9/573
摘要： PCT No. PCT/JP96/02387 Sec. 371 Date Aug. 6, 1997 Sec. 102(e) Date Aug. 6, 1997 PCT Filed Aug. 26, 1996 PCT Pub. No. WO97/24468 PCT Pub. Date Jul. 10, 1997In a method of continuously annealing steel strip comprising a heating step (A), a soaking step (B), a primary cooling step (C) including a rapid cooling step at least in a second half thereof, an overaging step (D), and a final cooling step (E), inert atmosphere gas containing H2 gas in the concentration of 30-60% is employed as cooling gas for use in the rapid cooling step, the blowoff temperature of the cooling gas is 30 DEG -150 DEG C., and the blowoff speed of the cooling gas is 100-150 m/sec. The primary cooling method in continuously annealing steel strip provides the primary cooling step (C) including the rapid cooling step which can be carried out with a high efficiency and a low cost.

4. 发明专利

DE69611033D1 未知
公开(公告)号：DE69611033D1
公开(公告)日：2000-12-28
申请号：DE69611033
申请日：1996-08-26
申请人： NIPPON STEEL CORP
发明人： SAKURAI KOICHI , SHIBUYA TATSURU , WAKABAYASHI HISAMOTO , WAKI KOUICHI , SUGIYAMA SEIJI , NAGAI KAZUNORI
IPC分类号： C21D9/56 , C21D1/613 , C21D9/573
摘要： PCT No. PCT/JP96/02387 Sec. 371 Date Aug. 6, 1997 Sec. 102(e) Date Aug. 6, 1997 PCT Filed Aug. 26, 1996 PCT Pub. No. WO97/24468 PCT Pub. Date Jul. 10, 1997In a method of continuously annealing steel strip comprising a heating step (A), a soaking step (B), a primary cooling step (C) including a rapid cooling step at least in a second half thereof, an overaging step (D), and a final cooling step (E), inert atmosphere gas containing H2 gas in the concentration of 30-60% is employed as cooling gas for use in the rapid cooling step, the blowoff temperature of the cooling gas is 30 DEG -150 DEG C., and the blowoff speed of the cooling gas is 100-150 m/sec. The primary cooling method in continuously annealing steel strip provides the primary cooling step (C) including the rapid cooling step which can be carried out with a high efficiency and a low cost.

5. 发明专利

JP2008150477A Thermal decomposition method for carbonaceous raw material 有权
标题翻译：碳分解原料的热分解方法
公开(公告)号：JP2008150477A
公开(公告)日：2008-07-03
申请号：JP2006339093
申请日：2006-12-15
申请人： Kyoto Univ , Nippon Steel Corp , 国立大学法人京都大学 , 新日本製鐵株式会社
发明人： HASHIMOTO SHIGERU , NAGAI KAZUNORI , MAE KAZUHIRO , HASEGAWA ISAO , OMUKAI YOSHIKAGE , KATOU YASUHIKO
IPC分类号： C10B49/06 , B09B3/00
CPC分类号： Y02E50/30 , Y02P20/143
摘要： PROBLEM TO BE SOLVED: To provide a thermal decomposition method for a carbonaceous resource capable of increasing a generated combustible gas by reducing tar by utilizing a characteristic of a shaft type thermal decomposition furnace. SOLUTION: In the thermal decomposition method for the carbonaceous raw material using a move bed shaft type thermal decomposition furnace, after the carbonaceous resource charged from an upper part of the furnace and descending the inside of the furnace is thermally decomposed by a heating gas charged from a lower part of the furnace and ascending the inside of the furnace, a generated solid carbonized material is discharged from the bottom of the furnace and the generated gas and tar are discharged from an upper part of the furnace. The amount of generated tar is reduced by making a ratio of sensible heat of the charged heating gas relative to an amount of the charged carbonaceous resource to 800 Mcal/ton-1,500 Mcal/ton. COPYRIGHT: (C)2008,JPO&INPIT
摘要翻译：要解决的问题：提供一种通过利用轴式热分解炉的特征，通过降低焦油来提高产生的可燃气体的碳质材料的热分解方法。解决方案：在使用移动床式热分解炉的碳质原料的热分解方法中，从炉上部装载并下降到炉内部的碳质物质通过加热热分解从炉下部装入并从炉内升起的气体，产生的固体碳化材料从炉底排出，产生的气体和焦油从炉的上部排出。通过使充电的加热气体的显热比相对于带电的碳质材料的量的比例为800Malal / ton-1500Mcal /吨来降低产生的焦油的量。版权所有（C）2008，JPO＆INPIT

6. 发明专利

JP2006315926A Method of treating converter by-produced gas 审中-公开
标题翻译：转化器生产气体的处理方法
公开(公告)号：JP2006315926A
公开(公告)日：2006-11-24
申请号：JP2005142003
申请日：2005-05-16
申请人： Nippon Steel Corp , 新日本製鐵株式会社
发明人： EBA ATSUSHI , YAMASHITA KOSUKE , NAGAI KAZUNORI
IPC分类号： C01B32/40 , B01D53/14
CPC分类号： Y02C10/06
摘要： PROBLEM TO BE SOLVED: To provide a method of treating a converter by-product gas (LDG) by which CO 2 in the LDG is reformed to CO to increase the calories of LDG and to amplify and increase the volume of the LDG. SOLUTION: In the method of treating the converter by-product gas, CO 2 contained in the by-product gas produced in a converter is removed by a CO 2 absorbing liquid supplied to an absorber and CO 2 released by regenerating the CO 2 absorbing liquid in a regeneration tower is mixed with oxygen to be blown into the converter and reacts with C in a hot metal in the converter to reform to CO. COPYRIGHT: (C)2007,JPO&INPIT
摘要翻译：要解决的问题：提供一种处理LDG中的CO 2 的转化器副产物气体（LDG）的方法，其将COG改性为CO以增加LDG的热量并放大并增加LDG的数量。解决方案：在处理转化器副产物气体的方法中，转化器中产生的副产物气体中所含的CO 2 通过CO 2 向吸收器供给的吸收液体和在再生塔中再生CO 2 SB吸收液释放的CO 2 与氧气混合，吹入转化器并与C反应转换器中的一种热金属转化为CO。版权所有：（C）2007，JPO＆INPIT

7. 发明专利

JP2005300068A Method for control of oxygen concentration and temperature of exhaust gas from rotary hearth reducing furnace 审中-公开
标题翻译：控制氧化还原炉氧气浓度和排气温度的方法
公开(公告)号：JP2005300068A
公开(公告)日：2005-10-27
申请号：JP2004118918
申请日：2004-04-14
申请人： Nippon Steel Corp , 新日本製鐵株式会社
发明人： NISHIMURA TETSUYA , NAGAI KAZUNORI
IPC分类号： C22B5/10 , C21B13/10 , F27B9/02 , F27B9/16 , F27D7/06 , F27D17/00
摘要： PROBLEM TO BE SOLVED: To enable stable reduction treatment in a rotary hearth furnace which prevents a reducing atmosphere from reacting with atmospheric air entering an exhaust duct to cause unnecessary heat generation and pressure increase, by controlling the temperature and oxygen concentration of exhaust gas without sacrificing a reduction treatment degree and the temperature and oxygen concentration of the reducing atmosphere.
SOLUTION: Secondary combustion air is sprayed into a furnace chamber (a) just upstream of exhaust with respect to a gas flow to bring the oxygen concentration 28 of exhaust gas to a predetermined oxygen concentration, and second combustion air is next sprayed into a furnace chamber (b) upstream of the furnace chamber a to bring the temperature 29 of the exhaust gas into a predetermined temperature range. The two means are repeated until the oxygen concentration 28 and temperature 29 in the exhaust gas duct fall within the predetermined ranges. For further improved controllability, temperature control measures the furnace temperatures of the furnace chambers (a) and (b) and changes fuel and primary combustion air to bring each furnace chamber to a predetermined temperature.
COPYRIGHT: (C)2006,JPO&NCIPI
摘要翻译：要解决的问题：为了在回转炉床炉中进行稳定的还原处理，通过控制排气的温度和氧浓度，防止还原气体与进入排气管的大气进行反应，引起不必要的发热和压力增加气体，而不牺牲还原处理度和还原气氛的温度和氧浓度。解决方案：二次燃烧空气相对于气流喷射到排气旁边的炉室（a）中，使废气的氧浓度28达到预定的氧浓度，然后将第二燃烧空气喷入炉室（b）在炉室a的上游，以使废气的温度29达到预定的温度范围。重复这两种方式，直到排气管道中的氧浓度28和温度29落在预定范围内。为了进一步提高可控性，温度控制测量炉室（a）和（b）的炉温，并改变燃料和初级燃烧空气，使每个炉室达到预定温度。版权所有（C）2006，JPO＆NCIPI

8. 发明专利

JP2004315852A Method for reducing metal oxide in rotary hearth type reduction furnace 审中-公开
公开(公告)号：JP2004315852A
公开(公告)日：2004-11-11
申请号：JP2003107941
申请日：2003-04-11
申请人： Nippon Steel Corp , 新日本製鐵株式会社
发明人： NAGAI KAZUNORI , SUNAKAWA TATSUNORI , ABE YOICHI , NAKANO MASANORI
IPC分类号： C22B1/16 , C21B13/10 , F27B9/16
摘要： PROBLEM TO BE SOLVED: To provide a method for inhibiting rock bed formation at the hearth of a rotary hearth type reduction furnace for molded bodies containing metal oxides without deteriorating a metallization ratio and zinc reduction ratio.
SOLUTION: A section between the raw-material-feeding hole and discharge hole of the rotary hearth type reduction furnace is divided into a plurality of zones. A zone to which a charging part belongs and a zone to which a discharge part belongs are defined as the first zone and the final zone, respectively. Burner combustion volume and/or air feed amount are controlled so that: the furnace temperatures in individual zones between the second zone and the zone before the last become 1,100 to 1,300°C, respectively; and the furnace temperature in the last zone becomes ≤1,220°C and lower by 20 to 200°C than the maximum temperature of the furnace temperatures in the individual zones between the second zone and the zone before the last.
COPYRIGHT: (C)2005,JPO&NCIPI

9. 发明专利

JPH0949068A PRODUCTION OF HOT DIP COATED STEEL SHEET 失效
公开(公告)号：JPH0949068A
公开(公告)日：1997-02-18
申请号：JP20371095
申请日：1995-08-10
申请人： NIPPON STEEL CORP
发明人： SUGIYAMA SEIJI , SAITO TAKEHIKO , NAGAI KAZUNORI
IPC分类号： C23C2/02 , C23C2/06 , C23C2/08 , C23C2/10 , C23C2/30
摘要： PROBLEM TO BE SOLVED: To suppress the adhesion of a deteriorated flux to a steel sheet, to prevent the formation of bite flaws and to improve the yield of products by lowering the oxygen concn. of the flux deposited and suspended on a plating bath surface at the time of plating. SOLUTION: A small amt. of the flux is applied on the steel sheet A after annealing, degreasing, pickling, pre-electroplating and pre-flux treating by a flux applying device 23 prior to hot dip coating and, thereafter, the steel sheet is immersed into a plating bath 13. At this time, a nonoxidizing gas is injected into the plating bath 13 from a nonoxidizing gas introducing pipe 25 disposed in a flux vessel 12 on the surface of the plating bath, by which the oxygen concn. in the flux vessel 12 and the oxygen concn. on a flux 12' floating on the plating bath surface are kept at

10. 发明专利

JPH06346156A METHOD FOR COOLING STEEL SHEET BY GAS JET 失效
公开(公告)号：JPH06346156A
公开(公告)日：1994-12-20
申请号：JP13625293
申请日：1993-06-07
申请人： NIPPON STEEL CORP
发明人： NAGAI KAZUNORI , SUGIYAMA SEIJI
IPC分类号： C21D9/573
摘要： PURPOSE:To provide a means for preventing the generation of surface flaw in a forced convection cooling device for continuous annealing furnace. CONSTITUTION:In the forced convection type cooling device for continuous annealing furnace composed of nozzle group of plural nozzles such having the tip opening projecting and injecting non-oxidizing gas from this nozzle group, the non-oxidizing gas having 70-90% of gaseous hydrogen concn. is blown to the steel sheet from the each nozzle. As the gaseous hydrogen itself has good heat conductivity and excellent cooling performance, and further, its density is small, the density of the blowing gas itself becomes small and in the same blowing speed, the colliding force of H2 to the steel sheet becomes small in comparison with the non-oxidizing gas such as N2 and that of low H2 concn., and the flapping of the steel sheet is reduced.

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