کد مقاله | کد نشریه | سال انتشار | مقاله انگلیسی | نسخه تمام متن |
---|---|---|---|---|
233972 | 465378 | 2010 | 7 صفحه PDF | دانلود رایگان |
![عکس صفحه اول مقاله: Interfacial phenomena in the sulfur–polytetrafluoroethylene system under hydrothermal conditions Interfacial phenomena in the sulfur–polytetrafluoroethylene system under hydrothermal conditions](/preview/png/233972.png)
Sulfur occlusion of pyrite particles during oxidative pressure leaching of mineral sulfide concentrates at temperatures below 160 °C has a deleterious effect on pyrite oxidation kinetics. Existing techniques in mitigating sulfur occlusion involve the use of surfactants or operation at temperatures above 160 °C which are a burden to the process economy. This study looks at the suitability of polytetrafluoroethylene (PTFE) to act as a solid sorbent for the liquid sulfur generated during the pressure leach process. The suitability of PTFE as a solid sorbent was determined by comparing interfacial phenomena in the corresponding sulfur–PTFE–leach and sulfur–mineral–leach systems. The work of adhesion in a sulfur–PTFE system was calculated using the interfacial tension and contact angle measured in the relevant sulfur–PTFE system, which is comparable to published values in the pyrite–sulfur system.
Journal: Minerals Engineering - Volume 23, Issue 14, November 2010, Pages 1113–1119