公开(公告)号：EP1391445A1

公开(公告)日：2004-02-25

申请号：EP02728078.3

申请日：2002-05-17

申请人： JFE Steel Corporation

发明人： TAKAHASHI, Tatsuhito, c/o intellectual PropertyDpt ,  TANABE, Haruyoshi, Intellectuel Property Section ,  YAO, Yasuko, c/o JFE R&D Corporation ,  INOUE, Shigeru, NK Techno Service CO LTD ,  WATANABE, Keiji, Intellectual Property Departement ,  ISOO, Tsuneo, c/o Intell Property Departement ,  KOHIRA, Satoshi, c/o Intell Property Departement ,  KAWABATA, Ryo, c/o Intell Property Departement ,  SHIROYAMA, Akira, c/o Intellectual Property Depart ,  MATSUNO, Hidetoshi, c/o Intellectual Property dept ,  MURAI, Takeshi, c/o Intellectual Property dept

IPC分类号： C05B5/00 ,  C05D3/04

CPC分类号： C05B19/00 ,  C05B5/00 ,  C05D3/04

摘要： Provided is a raw material for phosphate fertilizer having excellent fertilizer characteristics, which raw material consists essentially of a slag containing phosphate generated from dephosphorization reaction in molten iron, and is a method for manufacturing the raw material suitable for manufacturing the phosphate fertilizer. The raw material for phosphate fertilizer consists essentially of a slag containing phosphate generated from dephosphorization reaction in molten iron. As for the slag composition, the phosphate content satisfies the formula (1), and preferably the formula (2): [P 2 O 5 ] ≧ 5.6 x [F] + 7 [P 2 O 5 ] ≧ 5.6 x [F] + 10    where, [P 2 O 5 ] is the phosphate content in slag, (mass%), and [F] is the fluorine content in slag, (mass%).
The method for manufacturing the raw material thereof is a method of charging an oxygen source and a CaO source to a molten iron which decreases the Si concentration therein to a sufficient level, thus inducing the dephosphorization reaction in the molten iron, or a method of charging a CaO source and a gas oxygen in respective specified configurations and conditions to the molten iron, thus inducing the dephosphorization reaction in the molten iron.

摘要翻译： 本发明提供肥料特性优异的磷肥用原料，其原料主要由含铁磷酸盐脱磷反应生成的含磷渣组成，是制造磷酸肥料的原料的制造方法。 磷酸肥料的原料基本上由含铁中的脱磷反应生成的含磷矿渣组成。 对于炉渣组成，磷酸盐含量满足公式（1），优选式（2）： = 5.6 xÄFÜ+ 7 =“（2）”>ÄP2O5Ü> / = 5.6 xÄFÜ+ 10 其中，ÄP2O5Ü是渣中的磷酸盐含量（质量％），ÄFÜ是炉渣中的氟含量（质量％）。 其原料的制造方法是将氧源和CaO源装入铁水中的方法，其将Si浓度降低到足够的水平，从而引起铁水中的脱磷反应，或者充电方法 一种CaO源和一种气体氧，在铁水的特定构造和条件下，引起铁水中的脱磷反应。