含锌铅粉尘配碳球团中铅挥发动力学

来源期刊：中国有色金属学报1997年第4期

论文作者：王东彦 王文忠 陈伟庆 周荣章 林宗彩

文章页码：38 - 41

关键词：锌铅粉尘 配碳球团 挥发动力学

Key words：Zn-Pb-bearing dusts carbon-containing pellets evaporation kinetics

摘    要：在氮气气氛和1100～1300℃温度范围内, 对含锌铅粉尘配碳球团中的铅挥发动力学的研究表明。还原温度对铅挥发速率有显著影响，而煤粉粒度及过量碳含量对铅挥发速度则没有影响。求得铅挥发表观活化能为88.74 kJ/mol，并确定铅的挥发限制性环节为铅的蒸发和铅通过其表面气相边界层的扩散。

Abstract: The study on the evaporation kinetics of lead in carbon-containing pellets made of Zn-Pb-bearing dusts, in an nitrogen atmosphere and between 1100℃ and 1300 ℃, showed that the reduction temperature has significant effects on evaporation rate of lead and that the particle size of coal powder and the extra carbon content have not effects on the evaporation rates. The activation energy 88.74kJ/mol was calculated for lead evaporation. The rate of lead evaporation is controlled by the lead volatilization reaction and the diffusion of gaseous lead through gas boundary on surface of the liquid lead.