钠化焙烧钒渣时氯化挥发镓的热力学分析
THERMODYNAMIC CALCULATION ON CHLORIDIZING VOLATILIZATION OF Ga DURING SODIUMINATION ROASTING OF V-SLAG
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摘要: 本文讨论了600~1200K范围内使用NaCl作为添加剂焙烧钒渣时氯化挥发镓的热力学可能性。结论是:氯氧比的大小与水溶性钒酸钠生成有直接联系.NaCl和Na2O,V2O5平衡时的氯氧比最大;在氯化钠作用下,镓主要生成GaCl3挥发,计算得到的GaCl3的生成压相当大。Abstract: This paper deals with,from the point of view of thermodynamics,the possibility of NaCl addition to chloridizing Volatilization of Ga during Sodiumination roasting of V-slag,in a temperature range 600~1200K.Conclusions are drawn that the magnitude of Cl2-O2 ratio is considerably related to the formation of aqueous sodium vana-date and reaches its maximum value,when NaCl and Na2O·V2O5 are at equilibrium state;and GaCl3 comes from Ga by chloridization and then volatilizes.Also.the thermo-dynamic calculation shows that the formation pressure of GaCl3 is quite high,therefore the attempt is worthy to be made.
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