Article ID | Journal | Published Year | Pages | File Type |
---|---|---|---|---|
11032780 | Vacuum | 2018 | 15 Pages |
Abstract
Stibnite is the main raw material employed to produce antimony. With the excessive exploitation of high-grade stibnite, low-grade stibnite become more and more important. This study aimed to introduce a vacuum process for recovering and enriching antimony from low-grade stibnite. At the pressure of 10â¯Pa, by controlling heating temperature, Sb2S3 and Sb2O3 from stibnite (12.8â¯wt% Sb) was evaporated and enriched. We investigated the influence of vacuum distillation temperature and time on the recovery of low-grade Sb2S3. The result indicated antimony recovery could reach about 97% for suitable vacuum distillation conditions, and the purity of Sb2S3 was about 95â¯wt%. As for high-grade stibnite, through two-step vacuum distillation, Sb could not only be recovered in the form of Sb2S3, but also purified to commercial Sb2S3 with a purity about 99.5â¯wt%. The results demonstrated that vacuum distillation is a possible way to recover antimony from low-grade stibnite and purify Sb2S3 from high grade stibnite.
Keywords
Related Topics
Physical Sciences and Engineering
Materials Science
Surfaces, Coatings and Films
Authors
Zhengen Zhou, Dachun Liu, Heng Xiong, Bo Zhang, Bin Yang, Yong Deng, Jingyang Zhao,