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- Title
Copper Behavior and Fayalite Microstructure Changes Influenced by Cu<sub>2</sub>O Dissolution.
- Authors
Zhao, Zongwen; Wang, Zhongbing; Peng, Ning; Peng, Bing; Liang, Yanjie; Qu, Shengli; Dong, Zhunqing; Zeng, Weizhi
- Abstract
The dissolution of Cu2O in fayalite is one of the chief processes that cause copper loss in metallurgical processes. In this paper, the interaction between fayalite and Cu2O is systematically studied to verify the main mechanism of copper loss as well as the variation in the fayalite microstructure. The results indicate the simultaneous occurrence of melting and dissolution of copper in fayalite. The redox reaction of Cu + + Fe 2 + = Cu + Fe 3 + occurs in the melt phase, resulting in the generation of metallic copper and amorphous iron. The copper dissolution impacts the fayalite microscopically. With the increase of Cu2O, the obvious phase separation is seen in the fayalite melt, and large metal particles are dispersed in the melt. In addition, the dissolution mechanism of copper and the change in the fayalite microstructure are analyzed by x-ray photoelectron spectroscopy and Raman spectroscopy. The results show that amorphous iron trapping Cu(I) and the formation of fayalite-combined copper are the most probable mechanisms for copper dissolution and the fayalite microstructure changes. These findings provide theoretical support for the secondary extraction of copper resources from copper slag.
- Subjects
COPPER slag; RAMAN spectroscopy; X-ray photoelectron spectroscopy; PHASE separation; OXIDATION-reduction reaction
- Publication
JOM: The Journal of The Minerals, Metals & Materials Society (TMS), 2019, Vol 71, Issue 8, p2891
- ISSN
1047-4838
- Publication type
Article
- DOI
10.1007/s11837-019-03519-3