复杂体系中锌铅氯化物饱和蒸气压的测试研究

In order to effectively control the vaporization behaviors of heavy metals such as zinc and lead in smelting process, it is necessary to obtain the basic knowledge such as the saturated vapor pressure and activities of heavy metals in complex system. The transpiration method was used to measure the saturated vapor pressures of zinc and lead chlorides in FeO-CaO-SiO2-Al2O3 system and the effect of influencing factors was discussed such as temperature, slag compositions and so on. The results showed that the saturated vapor pressures of zinc and lead chlorides are increased with an increase in temperature, and the logarithmic value of pressure has a good linear relationship with the reciprocal of the temperature. Additionally, slag compositions such as basicity and FeO content give great influence on the saturated vapor pressure. Low basicity and high FeO content tend to enhance the saturated vapor pressure of ZnCl2 and lead chlorides, while the vapor pressure of ZnCl2 showed a stronger function of temperature and slag composition compared with lead chlorides. The data acquired in this study are able to supply important theoretical foundation for effectively controlling the vaporization of heavy metals in melting process.