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- Title
Study on Formation Mechanism of Fayalite (Fe<sub>2</sub>SiO<sub>4</sub>) by Solid State Reaction in Sintering Process.
- Authors
Wang, Zhongbing; Peng, Bing; Zhang, Lifeng; Zhao, Zongwen; Liu, Degang; Peng, Ning; Wang, Dawei; He, Yinghe; Liang, Yanjie; Liu, Hui
- Abstract
The sintering behaviors among SiO2, FeS and Fe3O4 were detected to reveal the formation mechanism of Fe2SiO4. The results indicated that the formation mechanism is divided into five steps: (1) migration of O2− induced by S2− under a reducing atmosphere; (2) formation of Fe3O4−<italic>β</italic>; (3) migration of Fe(II) into a ferrite cluster structure to gain oxygen and form Fe3−<italic>x</italic>O4; (4) Fe(II) invaded the silicon atomic position and released Si(IV); and (5) formation of the stable structure of Fe2SiO4 through chemical diffusion between cations of Fe(II) and Si(IV). These findings can provide theoretical support for controlling the process of the recovery of valuable metals in copper slag through the combined roasting modification-magnetic separation process.
- Subjects
SINTERING; SILICON compounds; IRON sulfides; CHEMICAL reactions; MAGNETIC separation
- Publication
JOM: The Journal of The Minerals, Metals & Materials Society (TMS), 2018, Vol 70, Issue 4, p539
- ISSN
1047-4838
- Publication type
Article
- DOI
10.1007/s11837-017-2699-6