复杂体系中物质饱和蒸气压测试装置的设计及有效性检验

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. In this paper, the process of designing, installing and testing of the apparatus, which tends to be applied for the measurements of the saturated pressure of zinc and lead chlorides in complex system by using of transpiration method, was introduced. This apparatus was used to measure the saturated vapor pressure of standard substance NaCl. The testing results showed that the value obtained agrees reasonably well with the reference data. Additionally, the saturated vapor pressure of ZnCl2 in FeO-CaO-SiO2-Al2O3 system was tested at different temperature. And a linear relationship between the logarithmic value of the vapor pressure of ZnCl2 (lnP) and the reciprocal of temperature (1/T) is observed, which is similar with the previous research. All of these data above indicated that the present apparatus is suitable for detecting the vapor pressures of metal chlorides under high temperature.