Research of the evaporation law of elemental antimony under vacuum

Abstract

The variation of the weight of elemental antimony with time is measured by a vacuum differential weight furnace, and the evaporation rate of elemental antimony is obtained by mathematical statistical analysis at temperatures of 973–1473 K and ambient pressures of 5–500 Pa. The experimental results show that: when the temperature is constant, the relationship between the evaporation rate of metal antimony and the pressure conforms to the Logistics model, and the relationship formula is ω=A1−A21+(p/p0)m+A2; when the pressure is constant, there is a linear relationship between the logarithm of the evaporation rate of metal antimony and the reciprocal of temperature at the 95% confidence level, which satisfies the linear equation lgω=−AT+B; and the experimental maximum evaporation rate was always smaller than the theoretical maximum evaporation rate, and the condensation coefficient α ranged from 0.01 to 0.111. In this paper, the evaporation rates of elemental antimony under vacuum has been obtained through experimental research and data analysis, and the evaporation kinetic law is summarized, which can be used to predict the time and conditions required for the industrial treatment of elemental antimony by vacuum distillation, so as to provide theoretical guidance for the industrial treatment of elemental antimony by vacuum distillation.