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Thermodynamic Behavior of Manganese Oxide in Lime-based Manganese Smelting Slags

机译：氧化锰在石灰基锰熔渣中的热力学行为

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摘要

The thermodynamic behavior of MnO in the CaO-SiO_2-MnO slag system of lower basicity to understand the smelting reduction of silicomanganese was investigated. Experimental results indicated that the activity coefficient of MnO was not affected by MnO content less than 30 mol%. However, it did in fact increase as the MnO content increased beyond 30 mol% because the activity coefficient of MnO is closely associated with the silicate structure. The activity coefficient of MnO also increased with increasing basicity of slag and MgO content because of the free O~2 ions that are provided into the slag. On the other hand, the effect of the Al_2O_3 content on the activity coefficient of MnO was analyzed that the structure in the CaO-SiO_2-MnO-Al_2O_3 system changes from that of a Si-O-Si linkage to that of Si-O-Al and Al-O-Al linkages as the content of Al_2O_3 increases. Structural considerations concerning the effect of slag composition on the activity coefficient of MnO are discussed in detail using Fourier transform infrared (FT-IR) spectroscopy. Finally, it is shown that manganese recovery can be increased by increasing the activity coefficient of MnO in the slag.
机译：研究了碱度较低的CaO-SiO_2-MnO矿渣体系中MnO的热力学行为，以了解硅锰的熔炼还原。实验结果表明，MnO含量小于30mol％对MnO的活度系数没有影响。但是，实际上，由于MnO的活性系数与硅酸盐结构紧密相关，所以随着MnO含量增加超过30mol％，其确实增加了。 MnO的活度系数也随着炉渣碱度和MgO含量的增加而增加，这是由于向炉渣中提供了游离的O〜2离子。另一方面，分析了Al_2O_3含量对MnO活度系数的影响，表明CaO-SiO_2-MnO-Al_2O_3体系中的结构从Si-O-Si键变为Si-O-键。随着Al_2O_3含量的增加，Al和Al-O-Al键连接。使用傅立叶变换红外光谱（FT-IR）详细讨论了有关炉渣成分对MnO活度系数的影响的结构考虑。最后，结果表明，通过增加炉渣中MnO的活度系数可以提高锰的回收率。

著录项

  • 来源
    《ISIJ international》 |2016年第1期|37-43|共7页
  • 作者

    Chang-Ho EOM; Sung-Hee LEE; Jin-Gyun PARK; Joo-Hyun PARK; Dong-Joon MIN;

  • 作者单位

    Department of Materials Science and Engineering, Yonsei University, Seoul, 03722 Korea;

    Department of Materials Science and Engineering, Yonsei University, Seoul, 03722 Korea;

    PosNEP Research Group, RIST, Pohang, 37673 Korea;

    Department of Materials Engineering, Hanyang University, Ansan, 15588 Korea;

    Department of Materials Science and Engineering, Yonsei University, Seoul, 03722 Korea;

  • 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

    recovery; activity coefficient; manganese oxide; basicity; structure;

    机译：复苏;活度系数氧化锰碱性结构体;

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