Y. X. Hua and C.P. Liu(Depatment of Metallurgy
,
Kunming University of Science and Technology
,
Kunming 650093
,
China)
金属学报(英文版)
The evaporation kinetics of SnS from SnSCu2SFeS teruary system was investigated against matte grade, tetnperature and carrier gas flow rate. It was demonstrated that the evapomtion process is controlled by gas-phase mass transport. The increases of the flow rote of carrier gas and the temperature could increase the gas-phase mass transport coefficient and the Partial pressure of SnS over the melts, respectively, and hence would appreciably promote the evaporation process. An increase of matte grade could lower the activitv coefficient of SnS in the melts, which in turn would cause the reduction of the evapomtion rate of SnS
关键词:
evaporation kinetics
,
null
,
null
曾慧楠
,
贺永东
,
邢诗雨
,
李志军
,
刘向阳
,
何茂刚
稀有金属
doi:10.13373/j.cnki.cjrm.XY16100036
采用高温电阻炉制备了两组Cu-43％ Zn合金,利用蒸馏法、X射线衍射(XRD)、化学分析方法研究了在氮气和空气气氛下的熔炼过程中,Cu-Zn合金的质量损失与物相转变规律及低熔点合金组元Zn的蒸发、汽化过程.并采用差示扫描量热-热重分析连用(DSC-TGA)方法考察了该合金在氮气和空气气氛下升温状态的蒸发、氧化、汽化、造渣行为.通过采用蒸馏法和化学分析方法测量样品和基体Zn含量的质量损失随时间和温度的变化曲线,得出:试样质量和合金基体Zn含量均随着蒸发温度的升高和时间的延长而降低;在温度一定的条件下,试样质量和基体Zn含量降低到一定值时,保持相对恒定;温度越高,试样质量和Zn含量剩余越少.DSC-TGA的实验结果结合kissinger,Flynn-Wall-Ozawa方程得出:在氮气和空气气氛下Cu-Zn合金汽化峰的表观激活能依次为:5815.28,5107.05 kJ·mol-1.
关键词:
Cu-Zn合金
,
熔炼损耗
,
热分析
,
蒸馏法
,
蒸发动力学
