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1. 发明公开

EP1445337A1 METHOD FOR DEPHSOPHORIZATION OF MOLTEN IRONA 有权
标题翻译： VERFAHREN ZUR ENTPHOSPHORISIERUNG VON GESCHMOLZENEM EISEN
公开(公告)号：EP1445337A1
公开(公告)日：2004-08-11
申请号：EP02770227.3
申请日：2002-09-27
申请人： NIPPON STEEL CORPORATION
发明人： HIRATA, Hiroshi, C/O NIPPON STEEL CORP. , ISHII, Hiromi, C/O NIPPON STEEL CORP. , HAYASHI, Hiroaki, C/O NIPPON STEEL CORP. , OGAWA, Yuji, C/O NIPPON STEEL CORP. , SASAKI, Naoto, C/O NIPPON STEEL CORP. Tech. Dev.
IPC分类号： C21C1/02
CPC分类号： C21C7/064 , C21C1/02 , C21C1/025 , C21C5/32 , C21C7/0645 , C21C7/076 , Y02P10/242
摘要： The present invention provides, during dephosphorizing a hot metal by top blowing oxygen and injecting a flux by bottom blowing using a refining vessel having a top-and-bottom-blowing function, a dephosphorizing process capable of conducting excellent dephosphorization without using fluorite. That is, the process is as follows. A process for dephosphorizing a hot metal, wherein oxygen is top blown into a hot metal and a flux containing as a major component a component that is one or at least two substances selected from quick lime, limestone and iron oxide and that contains at least iron oxide is blown thereinto with oxygen, an inert gas or a mixture of the two gases used as a carrier gas, characterized by that the process including the step of blowing the flux into a hot metal in such a manner that the ratio of a mass of CaO in the blown flux to a total mass of oxygen (CaO/O) contained in iron oxide in the blown flux and in the carrier gas exceeds 2.5. Moreover, the present invention provides a process for dephosphorizing a hot metal comprising blowing the flux into a hot metal in such a manner that the proportion of solid oxygen based on the entire oxygen added becomes from 5 to 40% by mass.
摘要翻译：本发明提供一种通过顶吹氧气对热金属进行脱磷，并且使用具有上下吹功能的精制容器通过底吹吹入助熔剂的脱磷方法，其能够在不使用萤石的情况下进行优异的脱磷。也就是说，过程如下。一种用于将氧气顶部吹入热金属的热金属脱磷的方法和以主要成分为主要成分的助熔剂，其为选自生石灰，石灰石和氧化铁中的一种或至少两种物质，并且至少含有铁用氧气，惰性气体或用作载气的两种气体的混合物将氧化物吹入其中，其特征在于该方法包括以下步骤：将助熔剂吹入铁水中，使得质量比在吹入助熔剂中和载气中的吹入助熔剂中的CaO含量为氧化铁中所含的氧（CaO / O）总量超过2.5。此外，本发明提供了一种使铁水脱磷的方法，包括将助熔剂吹入铁水中，使得基于加入的全部氧气的固体氧比例为5〜40质量％。

2. 发明授权

EP1445337B1 METHOD FOR DEPHOSPHORIZATION OF MOLTEN IRON 有权
标题翻译：铁水的方法脱磷
公开(公告)号：EP1445337B1
公开(公告)日：2011-12-21
申请号：EP02770227.3
申请日：2002-09-27
申请人： Nippon Steel Corporation
发明人： HIRATA, Hiroshi, C/O NIPPON STEEL CORP. , ISHII, Hiromi, C/O NIPPON STEEL CORP. , HAYASHI, Hiroaki, C/O NIPPON STEEL CORP. , OGAWA, Yuji, C/O NIPPON STEEL CORP. , SASAKI, Naoto, C/O NIPPON STEEL CORP. Tech. Dev.
IPC分类号： C21C1/02 , C21C7/064
CPC分类号： C21C7/064 , C21C1/02 , C21C1/025 , C21C5/32 , C21C7/0645 , C21C7/076 , Y02P10/242
摘要： The present invention provides, during dephosphorizing a hot metal by top blowing oxygen and injecting a flux by bottom blowing using a refining vessel having a top-and-bottom-blowing function, a dephosphorizing process capable of conducting excellent dephosphorization without using fluorite. That is, the process is as follows. A process for dephosphorizing a hot metal, wherein oxygen is top blown into a hot metal and a flux containing as a major component a component that is one or at least two substances selected from quick lime, limestone and iron oxide and that contains at least iron oxide is blown thereinto with oxygen, an inert gas or a mixture of the two gases used as a carrier gas, characterized by that the process including the step of blowing the flux into a hot metal in such a manner that the ratio of a mass of CaO in the blown flux to a total mass of oxygen (CaO/O) contained in iron oxide in the blown flux and in the carrier gas exceeds 2.5. Moreover, the present invention provides a process for dephosphorizing a hot metal comprising blowing the flux into a hot metal in such a manner that the proportion of solid oxygen based on the entire oxygen added becomes from 5 to 40% by mass.

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