Study on formation mechanism of fayalite (Fe2SiO4) by solid state reaction in sintering process

Wang, Zhongbing, Peng, Bing, Zhang, Lifeng, Zhao, Zongwen, Liu, Degang, Peng, Ning, Wang, Dawei, He, Yinghe, Liang, Yanjie, and Liu, Hui (2018) Study on formation mechanism of fayalite (Fe2SiO4) by solid state reaction in sintering process. JOM, 70 (4). pp. 539-546.

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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−β ; (3) migration of Fe(II) into a ferrite cluster structure to gain oxygen and form Fe3−x 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.

Item ID: 53515
Item Type: Article (Research - C1)
ISSN: 1543-1851
Copyright Information: © The Minerals, Metals & Materials Society 2017
Funders: National Natural Science Foundation of China (NSFC), Special Program on Environmental Protection for Public Welfare (SPEPPW), Central South University China (CSU-China)
Projects and Grants: NSFC 51634010, NSFC 51574295, SPEPPW 201509050, CSU-China No. 2015CX001
Date Deposited: 09 May 2018 07:37
FoR Codes: 40 ENGINEERING > 4019 Resources engineering and extractive metallurgy > 401908 Pyrometallurgy @ 100%
SEO Codes: 84 MINERAL RESOURCES (excl. Energy Resources) > 8402 Primary Mining and Extraction Processes of Mineral Resources > 840202 Mining and Extraction of Copper Ores @ 100%
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