THERMODYNAMICS OF ANTIMONY, ARSENIC, AND TIN IN CAO-CAF2 MELTS
THERMODYNAMICS OF ANTIMONY, ARSENIC, AND TIN IN CAO-CAF2 MELTS
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DOI：
10.1002/srin.198700224
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发表时间：
1987-01-01
期刊：
影响因子：
--
通讯作者：
SANO, N
中科院分区：
文献类型：
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作者：
ISAWA, T;WAKASUGI, T;SANO, N
鉴于今后大量消耗废钢造成的杂质元素对钢材的污染，本文通过考察Sb、As、Sn、Cu在Cu、Ag、Sn合金和CaO-CaF_2熔体中的分配与CaO活度的关系，研究了还原条件下Sb、As、Sn、Cu在CaO-CaF_2熔体中的热力学行为。结果表明，Ca化合物处理的反应产物为Ca_3Sb_2、Ca_3As_2、Ca_2Sn和CaCu。实验获得的分布被外推到低于10− 18 atm的较低氧分压，以估计从铁水中去除这些杂质元素的可行性。实验表明，如果环境中的氧分压低于10 - 23 atm，除了铜之外，这些杂质将基本上从钢水中除去。
In view of the importance of tramp element contamination of steel products through a large volume of scrap consumption in the near future, the thermodynamic behaviour of Sb, As, Sn and Cu in CaO—CaF2melts under reducing conditions was studied by examining the dependences of distribution of each element between Cu, Ag or Sn alloys and CaO—CaF2melts on the CaO activity, oxygen partial pressure and temperature around 1 500°C.As a result, the reaction products on treatment by Ca compounds were demonstrated to be Ca3Sb2, Ca3As2, Ca2Sn and CaCu. Experimentally obtained distributions were extrapolated to lower oxygen partial pressures less than 10−18atm to estimate the feasibility of removing those tramp elements from molten iron. It is thermodynamically indicated that if the prevailing oxygen partial pressure of the environment is below 10−23atm, these impurities, except Cu, would be substantially removed from molten steel.