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1. 发明专利

JP2001323314A METHOD FOR DESULFURIZING STAINLESS STEEL 失效
公开(公告)号：JP2001323314A
公开(公告)日：2001-11-22
申请号：JP2000140595
申请日：2000-05-12
申请人： NIPPON STEEL CORP
发明人： NAKAO RYUJI , KANEKAWA MASARU , IGARASHI MASAO
IPC分类号： C21C7/064 , C21C5/52 , C21C7/00 , C21C7/076
摘要： PROBLEM TO BE SOLVED: To efficiently perform desulfurizing-refining by surely confirming the progressing state and the desulfurizing ability in the melting or the refining processes of a stainless steel. SOLUTION: In the processes for melting the stainless steel in an electric furnace and for refining in a refining furnace, (MnO) concentration in the slag is analyzed to grasp the progressing state and the desulfurizing capacity from this (MnO) concentration. Based on this grasped progressing state and desulfurizing capacity of the desulfurizing reaction, the stirring of the molten steel is performed and/or flux for desulfurizing is added.

2. 发明专利

JP2000313914A NOZZLE FOR GAS BLOWING, MANUFACTURE THEREOF AND STRUCTURE OF GAS BLOWING 失效
公开(公告)号：JP2000313914A
公开(公告)日：2000-11-14
申请号：JP22601299
申请日：1999-08-10
申请人： NIPPON STEEL CORP
发明人： GOTO KIYOSHI , IMOTO TADASHI , KANEKAWA MASARU
IPC分类号： C22B9/05 , C21C5/48 , C21C5/52 , C21C7/072 , F27D3/16
摘要： PROBLEM TO BE SOLVED: To obtain a gas bottom-blown nozzle and a sleeve having high durability and long service life and easily exchanging. SOLUTION: A through-hole wall of the nozzle has a layer structure in two or more layers of a metallic tube 3 and a ceramic tube 2. Further, the nozzle has thick thickness at the middle part and in the state covering the sleeve, the nozzle is formed as more slender shape as coming to the upper part. In the inert part of the nozzle, a metallic structural body 5 fitted to a refractory constituting the nozzle is arranged and this base part is connected with a wind box and this tip part reaches the upper part from the thickest portion of the nozzle. Therefore, the breakage of the tube caused by the pressurizing at the manufacturing and the wearing caused by the effect of molten metal are not generated and the durability is high. Further, when the nozzle is pulled out, even in the case of generating the crack in the nozzle, the nozzle can be pulled out without breaking due to the fitted metallic structure body and the sleeve can be pulled out, too without leaving because of the thick thickness at the middle part in the nozzle shape.

3. 发明专利

JPH10152718A METHOD FOR MELTING CHROMIUM-CONTAINING STEEL 失效
公开(公告)号：JPH10152718A
公开(公告)日：1998-06-09
申请号：JP32800396
申请日：1996-11-25
申请人： NIPPON STEEL CORP
发明人： NAKAO RYUJI , KANEKAWA MASARU , TAKANO HIRONORI
IPC分类号： C21C5/52
摘要： PROBLEM TO BE SOLVED: To shorten molten time, to reduce the unit requirement of electric power and to drastically improve productivity and cost by blowing a special quantity of mixed gas of the air and the oxygen having a specific oxygen ratio per ton of molten steel into the molten steel. SOLUTION: The air or the mixed gas is blown into the molten steel 3 from a bottom-blown nozzle 6 arranged at the bottom part of an electric furnace 1 or from a lance inserted from a furnace belly part into the furnace. In the case of melting a chromium-containing steel by this method, into the molten steel at the time of melting unmelting raw material 4 charged in the electric furnace 1 at >=80vol%, the air or the mixed gas of the air and the oxygen having 21-50vol% oxygen ratio is blown at 0.3Nm /min.ton of the molten steel. Then, [Si] concn. in the raw material and the oxygen ratio in the mixed gas are adjusted according to a target [Si] concn. in the molten steel. By this method, the hitting of the target [Si] concn. after melting can easily be obtd. by adjusting gas blowing condition, etc.

4. 发明专利

JP2003322313A Oxygen burner for arc furnace 审中-公开
标题翻译：氧气燃烧器
公开(公告)号：JP2003322313A
公开(公告)日：2003-11-14
申请号：JP2002130798
申请日：2002-05-02
申请人： Chugai Ro Co Ltd , Nippon Steel Corp , 中外炉工業株式会社 , 新日本製鐵株式会社
发明人： MORI KIYOSUKE , KANEKAWA MASARU , NAKANE HIROFUMI , KOKUBU MASASHIGE , MAEDA TSUGUTOSHI
IPC分类号： F23D14/32 , F23D14/22 , F23D14/56 , F23L7/00 , F27B3/20
CPC分类号： Y02E20/344
摘要： PROBLEM TO BE SOLVED: To provide a burner device having improved burner efficiency by enabling burner combustion in an arc furnace, which dissolves a metal material, at the beginning of dissolution and achieving safe burner combustion by enabling sure combustion of a fuel even for use in a preheating furnace. SOLUTION: The oxygen burner is provided outward from the furnace wall of the arc furnace which dissolves the metal material, for injecting combustion flames of the fuel burnt together with oxygen inward to the furnace wall to accelerate the heat and/or dissolution of the metal material. It comprises a first fuel blowing pipe for blowing a first fuel from a central portion of the oxygen burner, a first oxygen blowing pipe for blowing first oxygen from the outer periphery of the first fuel blowing pipe, a second fuel blowing pipe for blowing a second fuel from the outer periphery of the oxygen blowing pipe, and a second oxygen blowing pipe for blowing second oxygen from the outer periphery of the second fuel blowing pipe. An insertion hole is formed by an opening hole provided in a panel of the arc furnace and a mounted seat mounted on the outer face of the panel, and the burner is mounted at its end into the insertion hole. COPYRIGHT: (C)2004,JPO
摘要翻译：要解决的问题：提供一种通过在溶解金属材料的电弧炉中实现燃烧器燃烧而提高燃烧器效率的燃烧器装置，在溶解开始时，通过使得能够确保燃料均匀燃烧来实现安全的燃烧器燃烧用于预热炉。解决方案：氧气燃烧器从电弧炉的炉壁向外提供，其溶解金属材料，用于将燃烧的燃料的燃烧与氧一起向内喷射到炉壁，以加速和/或溶解金属材料。它包括用于从氧气燃烧器的中心部分吹送第一燃料的第一燃料吹送管，用于从第一燃料吹送管的外周吹送第一氧的第一氧气吹送管，用于吹送第二燃料吹送管的第二燃料吹送管来自氧气吹送管的外周的燃料，以及用于从第二燃料吹送管的外周吹出第二氧气的第二氧气吹送管。通过设置在电弧炉的面板上的开孔形成插入孔，安装在面板的外表面上的安装座，燃烧器的端部安装在插入孔内。版权所有（C）2004，JPO

5. 发明专利

JP2003302286A Method and device for sequentially measuring molten metal temperature 审中-公开
标题翻译：用于顺序测量金属温度的方法和装置
公开(公告)号：JP2003302286A
公开(公告)日：2003-10-24
申请号：JP2002106385
申请日：2002-04-09
申请人： Nippon Steel Corp , 新日本製鐵株式会社
发明人： SUGIURA MASAHITO , NAKAO RYUJI , KANEKAWA MASARU , NAGATA SEIJI
IPC分类号： G01J5/02 , F27D21/00 , G01J5/00 , G01J5/10
摘要： PROBLEM TO BE SOLVED: To provide a technique for accurately and continuously measuring a molten metal temperature from the upper part of a furnace and measuring a temperature of each part inside the furnace.
SOLUTION: In this temperature measurement method, a radiation temperature of the molten metal 2 is measured via a heat-resistant measurement cylindrical body 4 inserted into the molten metal from the upper side of a melting furnace or a refining furnace and the inside space of the measurement cylinder body. In this process, when a purge gas introduced into the measurement cylinder body is jetted in the molten metal, a substantially closed measurement space part 7 is formed inside the molten metal by a purge gas pressure in the tip part of an observation cylinder body, and a radiation heat temperature of the inside wall of the measurement space is sequentially measured.
COPYRIGHT: (C)2004,JPO
摘要翻译：要解决的问题：提供一种从炉上部准确连续地测量熔融金属温度并测量炉内各部件的温度的技术。解决方案：在该温度测量方法中，通过从熔炉或精炼炉的上侧插入熔融金属的耐热测量圆筒体4测量熔融金属2的辐射温度，测量缸体的空间。在该过程中，当在熔融金属中喷射引入到测量筒体中的吹扫气体时，在观察筒体的顶端部中通过吹扫气体压力在熔融金属内形成基本封闭的测量空间部分7，依次测量测量空间的内壁的辐射热温度。版权所有（C）2004，JPO

6. 发明专利

JP2010242128A Method for recovering molten metal 有权
标题翻译：回收金属的方法
公开(公告)号：JP2010242128A
公开(公告)日：2010-10-28
申请号：JP2009089498
申请日：2009-04-01
申请人： Nippon Steel Corp , 新日本製鐵株式会社
发明人： ARAI TAKASHI , KATO KATSUHIKO , FUTAKA MIKIO , KANEKAWA MASARU
IPC分类号： C22B34/32 , C22B5/04 , C22B7/04
CPC分类号： Y02P10/212
摘要： PROBLEM TO BE SOLVED: To perform reduction of chromium-containing slag in just proportion by controlling an amount of silicon used as a reducing agent and an amount of slag to be reduced to proper balance, chromium metal is sufficiently collected under a stable operation, and oxygen efficiency and metal yield are raised in a decarburization process which is a postprocess in a method for recovering molten metal for recovering chromium metal from the chromium-containing slag by mainly using silicon in a cold iron source containing chromium. SOLUTION: The chromium-containing cold iron source, and chromium-containing slag of an amount with 90 mass% or less of an amount of chromium-containing slag containing chromic oxide for equivalent which reacts with silicon in the chromium-containing cold iron source are supplied to a melting furnace, an amount of silicon contained in the molten metal is measured after the chromium-containing cold iron source and chromium-containing slag are completely melt, and the amount of chromium-containing slag containing chromic oxide for equivalent which reacts with the measured amount of silicon is determined as the amount of chromium-containing slag to be additionally supplied to the melting furnace. COPYRIGHT: (C)2011,JPO&INPIT
摘要翻译：要解决的问题：为了通过控制用作还原剂的硅的量和要还原到适当平衡的炉渣的量来以正比例的比例还原含铬炉渣，在稳定的条件下充分收集铬金属在通过主要在含铬的冷铁源中使用硅来回收来自含铬渣的铬金属回收熔融金属的方法中的后处理的脱碳工艺中，提高了操作，氧效率和金属收率。解决方案：含铬冷渣源和含铬矿渣含量为90质量％以下的铬含量的含铬矿渣含铬氧化物当量，与含铬冷却剂中的硅反应将铁源供给熔化炉，在含铬冷铁源和含铬炉渣完全熔融后，测定熔融金属中含有的硅的量，将含有氧化铬的含铬渣含量等同于将与测定的硅量反应的量与作为额外供给到熔融炉的含铬渣的量进行比较。版权所有（C）2011，JPO＆INPIT

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