CaS飽和CaO-SiO_2-CaSスラグの成分活量とCaOの標準生成自由エネルギー Activities CaO-SiO_2-CaS Slag Saturated with CaS and Standard Free Energy of Formation of CaO

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In order to develop the analysis of various pyro-metallurgical processes, thermodynamic properties related to CaO, the most important component of slag or flux, at 1,773 K were determined by conducting the following experiments: (1) Equilibration of molten copper with solid SiO2 under controlled oxygen partial pressure. (2) Equilibration of molten copper with the CaO-SiO2-CaS slag saturated with CaS in a CaS crucible. From the results of the experiment (1), the Raoultian activity coefficient of silicon at infinite dilution in molten copper at 1,773 K, was determined as: log = -1.45 (±0.03). Based on the results of experiment (2) and the previously determined value of , the activities of SiO2 and CaO in the CaO-SiO2-CaS slag saturated with CaS at 1,773 K were calculated by application of the Gibbs-Duhem integration techniques. And then, the standard free energy of formation of CaO at 1,773 K were determined to be: Ca(g) + 1/� O2(g) = CaO(s):ΔG / �J·mol-1 = -430 (±10).

収録刊行物

  • 資源と素材 : 資源・素材学会誌 : journal of the Mining and Materials Processing Institute of Japan  

    資源と素材 : 資源・素材学会誌 : journal of the Mining and Materials Processing Institute of Japan 115(4), 257-262, 1999-04-25 

    The Mining and Materials Processing Institute of Japan

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各種コード

  • NII論文ID(NAID)
    10002469509
  • NII書誌ID(NCID)
    AN10062646
  • 本文言語コード
    JPN
  • 資料種別
    ART
  • ISSN
    09161740
  • NDL 記事登録ID
    4728206
  • NDL 雑誌分類
    ZP41(科学技術--金属工学・鉱山工学)
  • NDL 請求記号
    Z17-315
  • データ提供元
    CJP書誌  NDL  J-STAGE 
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