公开(公告)号：EP2383352B1

公开(公告)日：2018-10-31

申请号：EP09835099.4

申请日：2009-12-22

申请人： JFE Steel Corporation

发明人： KIKUCHI, Naoki ,  MATSUI, Akitoshi ,  TAKAHASHI, Katsunori ,  TOBO, Hiroyuki ,  KISHIMOTO, Yasuo

IPC分类号： C21C5/28 ,  C04B5/06 ,  C21C1/02 ,  C22B1/16

CPC分类号： C22B7/04 ,  C04B5/06 ,  C21B3/06 ,  C21C1/025 ,  C21C7/0087 ,  C21C7/076 ,  C22B5/04 ,  C22B5/10 ,  Y02P10/216 ,  Y02P10/234 ,  Y02P10/242 ,  Y02W30/543

摘要： The invention provides a method for recovering (collecting) iron and phosphorus from steelmaking slag, which includes a first step in which phosphorus-containing steelmaking slag such as dephosphorization slag is reduced using a reducing agent containing for example carbon, Si or Al to reduce iron oxide and phosphorus oxide in the slag and to recover them as phosphorus-containing molten iron, a second step in which the steelmaking slag from which the iron oxide and the phosphorus oxide have been removed is used as a CaO source in a sintering step and the resultant sintered ore is recycled to a blast furnace, a third step in which the phosphorus-containing molten iron recovered by the reduction is dephosphorized to a phosphorus concentration in the phosphorus-containing molten iron of not more than 0.1% by mass, thereby phosphorus being concentrated in a CaO-containing flux, and a fourth step in which the phosphorus-containing molten iron dephosphorized to a phosphorus concentration of not more than 0.1% by mass is mixed as an iron source with a blast furnace hot metal. The method thus enables inexpensive recovery of phosphorus and iron from the steelmaking slag, and the phosphorus and the iron recovered are effectively used as resources.

公开(公告)号：EP3239308A1

公开(公告)日：2017-11-01

申请号：EP17171814.1

申请日：2009-12-22

申请人： JFE STEEL CORPORATION

发明人： KIKUCHI, Naoki ,  MATSUI, Akitoshi ,  TAKAHASHI, Katsunori ,  TOBO, Hiroyuki ,  KISHIMOTO, Yasuo

IPC分类号： C21C5/28 ,  C04B5/06 ,  C21C1/02 ,  C22B1/16

CPC分类号： C22B7/04 ,  C04B5/06 ,  C21B3/06 ,  C21C1/025 ,  C21C7/0087 ,  C21C7/076 ,  C22B5/04 ,  C22B5/10 ,  Y02P10/216 ,  Y02P10/234 ,  Y02P10/242 ,  Y02W30/543

摘要： The invention provides a method for recovering (collecting) iron and phosphorus from steelmaking slag, which includes a first step in which phosphorus-containing steelmaking slag such as dephosphorization slag is reduced using a reducing agent containing for example carbon, Si or Al to reduce iron oxide and phosphorus oxide in the slag and to recover them as phosphorus-containing molten iron, a second step in which the steelmaking slag from which the iron oxide and the phosphorus oxide have been removed is used as a CaO source in a sintering step and the resultant sintered ore is recycled to a blast furnace, a third step in which the phosphorus-containing molten iron recovered by the reduction is dephosphorized to a phosphorus concentration in the phosphorus-containing molten iron of not more than 0.1% by mass, thereby phosphorus being concentrated in a CaO-containing flux, and a fourth step in which the phosphorus-containing molten iron dephosphorized to a phosphorus concentration of not more than 0.1% by mass is mixed as an iron source with a blast furnace hot metal. The method thus enables inexpensive recovery of phosphorus and iron from the steelmaking slag, and the phosphorus and the iron recovered are effectively used as resources.

摘要翻译： 本发明提供了一种从炼钢炉渣中回收（收集）铁和磷的方法，该方法包括第一步骤，其中使用包含例如碳，Si或Al的还原剂还原脱磷炉渣等含磷炼钢炉渣以还原铁 氧化物和氧化磷，并将其作为含磷铁水回收;第二步，其中已经除去了氧化铁和氧化磷的炼钢炉渣用作烧结步骤中的CaO源， 将所得到的烧结矿再循环至高炉;第三步，将通过还原回收的含磷铁水脱磷至磷含铁水中的磷浓度不超过0.1质量％，从而使磷 浓缩在含有CaO的助熔剂中，以及第四步骤，其中将含磷铁水脱磷至磷浓度为 不超过0.1质量％作为铁源与高炉铁水混合。 因此该方法能够廉价地从炼钢渣中回收磷和铁，并且回收的磷和铁被有效地用作资源。

公开(公告)号：EP2383352A1

公开(公告)日：2011-11-02

申请号：EP09835099.4

申请日：2009-12-22

申请人： JFE Steel Corporation

发明人： KIKUCHI, Naoki ,  MATSUI, Akitoshi ,  TAKAHASHI, Katsunori ,  TOBO, Hiroyuki ,  KISHIMOTO, Yasuo

IPC分类号： C21C5/28 ,  C04B5/06 ,  C21C1/02 ,  C22B1/16

CPC分类号： C22B7/04 ,  C04B5/06 ,  C21B3/06 ,  C21C1/025 ,  C21C7/0087 ,  C21C7/076 ,  C22B5/04 ,  C22B5/10 ,  Y02P10/216 ,  Y02P10/234 ,  Y02P10/242 ,  Y02W30/543

摘要： The invention provides a method for recovering (collecting) iron and phosphorus from steelmaking slag, which includes a first step in which phosphorus-containing steelmaking slag such as dephosphorization slag is reduced using a reducing agent containing for example carbon, Si or Al to reduce iron oxide and phosphorus oxide in the slag and to recover them as phosphorus-containing molten iron, a second step in which the steelmaking slag from which the iron oxide and the phosphorus oxide have been removed is used as a CaO source in a sintering step and the resultant sintered ore is recycled to a blast furnace, a third step in which the phosphorus-containing molten iron recovered by the reduction is dephosphorized to a phosphorus concentration in the phosphorus-containing molten iron of not more than 0.1% by mass, thereby phosphorus being concentrated in a CaO-containing flux, and a fourth step in which the phosphorus-containing molten iron dephosphorized to a phosphorus concentration of not more than 0.1% by mass is mixed as an iron source with a blast furnace hot metal. The method thus enables inexpensive recovery of phosphorus and iron from the steelmaking slag, and the phosphorus and the iron recovered are effectively used as resources.

摘要翻译： 本发明提供了一种从钢铁渣中回收（收集）铁和磷的方法，其中包括第一步，其中使用含有例如碳，Si或Al的还原剂还原含磷钢渣如脱磷渣，以还原铁 在炉渣中的氧化物和氧化磷，并将其回收为含磷铁水，在烧结步骤中，将除去了氧化铁和氧化磷的炼钢炉渣作为CaO源的第二工序， 将得到的烧结矿再循环至高炉，第3工序中，将通过还原反应回收的含磷铁水脱磷至含磷铁水中的磷浓度为0.1质量％以下，磷为 浓缩在含CaO的助熔剂中，第四步是将含磷铁水脱磷至磷浓度 不高于0.1质量％的铁矿源与高炉铁水混合。 因此，该方法能够从钢铁炉渣中廉价地回收磷和铁，并且所回收的磷和铁被有效地用作资源。