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首页> 外文期刊>ISIJ international >Separation of FeO and P_2O_5 from Steelmaking Slag Utilizing Capillary Action
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Separation of FeO and P_2O_5 from Steelmaking Slag Utilizing Capillary Action

机译：利用毛细作用从炼钢渣中分离FeO和P_2O_5

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摘要

The recoverability of FeO and P resources from steelmaking slag was investigated using a novel mechanical approach involving capillary action. After determining the phase relationship of the CaO-FeO-SiO_2-P_2O_5 system with the coexisting 2CaO·SiO_2 and MgO phases, it was found that P_2O_5 was concentrated in the 2CaO·SiO_2 phase and was also distributed in the liquid phase. Due to the density difference of the FeO rich liquid phase and P_2O_6 containing 2CaO·SiO_2 phase, the P_2O_5 concentration in the upper part of the sample was 2.2-3.6 times higher than that of the lower part. Also, the FeO concentration in the upper part of the sample was nearly half of that in the lower part. To improve the efficiency of the separation of the solid 2CaO·SiO_2 phase and FeO rich liquid phase in steelmaking, capillary action was used to facilitate penetration into sintered CaO. Once the liquid phase had penetrated the CaO sinter, it was found that that the solid 2CaO·SiO_2 phase and FeO rich phase could be effectively separated. When a sintered CaO sphere was added to a mixture of the solid 2CaO·SiO_2 phase and FeO rich liquid phase, it was possible to recover 87% of the P_2O_5 and 90% of the FeO from steelmaking slag. The recovered CaO sinter, which includes a FeO rich liquid phase, may be used as Fe source or a dephosphorization agent, and the 2CaO·SiO_2 phase, which includes P_2O_5, may be used as P source.
机译：使用一种涉及毛细作用的新型机械方法研究了炼钢渣中FeO和P资源的可回收性。在确定了CaO-FeO-SiO_2-P_2O_5与2CaO·SiO_2和MgO相共存的相关系后，发现P_2O_5集中在2CaO·SiO_2相中，并且也分布在液相中。由于富FeO液相和含有2CaO·SiO_2相的P_2O_6的密度差，样品上部的P_2O_5浓度比下部的高2.2-3.6倍。另外，样品上部的FeO浓度几乎是下部的FeO浓度的一半。为了提高炼钢中2CaO·SiO_2固相和富FeO液相的分离效率，毛细作用被用来促进渗透到烧结的CaO中。一旦液相渗透到CaO烧结体中，发现可以有效地分离出固态的2CaO·SiO_2相和富FeO相。当将烧结的CaO球添加到固态2CaO·SiO_2相和富FeO液相的混合物中时，可以从炼钢炉渣中回收87％的P_2O_5和90％的FeO。包括富FeO液相的回收的CaO烧结体可以用作Fe源或脱磷剂，而包括P_2O_5的2CaO·SiO_2相可以用作P源。

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  • 来源
    《ISIJ international》 |2015年第1期|142-148|共7页
  • 作者

    Takahiro MIKI; Shigeru KANEKO;

  • 作者单位

    Department of Metallurgy, Tohoku University, 6-6-02, Aoba-yama, Aobaku, Sendai, Miyagi, 980-8579 Japan;

    Tohoku University. Now at Nippon Steel and Sumikin Stainless Steel, 3434 Shimata, Hikari-City, Yamaguchi, 743-8550 Japan;

  • 收录信息 美国《科学引文索引》(SCI);美国《工程索引》(EI);美国《生物学医学文摘》(MEDLINE);
  • 原文格式 PDF
  • 正文语种 eng
  • 中图分类
  • 关键词

    phase diagram; phosphorus; iron; distribution; equilibrium;

    机译：相图磷;铁;分配;平衡;

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