Experimental study on the thermal volatilization and condensation of zinc at 10 Pa and 200 Pa

Journal of Materials Research and Technology

卷:9

Da-Chun Liu¹  Bao-Qiang Xu²  Yang Tian²  Fei Wang³  Wei Zhang⁴  Bin Yang⁴ 

[1] Key Laboratory of Vacuum Metallurgy for Nonferrous Metal of Yunnan Province, Kunming University of Science and Technology, Kunming 650093, China;

[2] National Engineering Laboratory for Vacuum Metallurgy, Kunming University of Science and Technology, Kunming 650093, China;

[3] School of Metallurgy and Energy Engineering, Kunming University of Science and Technology, Kunming 650093, China;

[4] State Key Laboratory of Complex Non-ferrous Metal Resources Clear Utilization, Kunming University of Science and Technology, Kunming 650093, China;

关键词: Thermal volatilization;    Condensation temperature;    Zinc vapor;    Collisions;    Vacuum;   

DOI  :  

来源: DOAJ

【 摘 要 】

The thermal volatilization and condensation of zinc at different heating temperatures were investigated at 10 Pa and 200 Pa. The vacuum technique is beneficial for the volatilization of metallic zinc, and the zinc volatilization is affected by heat transfer and mass transfer. The effect of zinc partial pressure on the nucleation is analyzed in terms of the average number of collisions of molecules. When the system pressure is 10 Pa, the range of the condensation temperature of (623–503 K) does not change with the change of the heating temperature, which is consistent with the pressure on the average number of collisions of zinc molecules per unit time. In addition, when argon gas is introduced into the system to keep the pressure at 200 Pa, the condensation temperature ranges becomes different and the heating temperature is linear with the condensation initiation temperature. The condensation mechanism of condensed products is different at different axial distances of 1023 K under 10 Pa and 200 Pa. The morphology and the particle size of the products are different under different system pressures, respectively.

【 授权许可】

Unknown