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- Title
Microscopic Study of the Phase Transformation During the Oxygen-Enriched Direct Smelting of Jamesonite Concentrate.
- Authors
Chen, Min; Dai, Xi
- Abstract
Samples of partially oxidized jamesonite particles and crude lead-antimony alloy from oxygen-enriched direct smelting of jamesonite concentrate have been characterized by electron probe microanalysis (EPMA), x-ray diffraction (XRD), and scanning electron microscopy (SEM) equipped with energy-dispersive spectroscopy (EDS). It was shown that the Fe diffused outward from the center of the jamesonite to the outermost layer forming an iron-riched sulfide coat, while the behaviors of Pb, Sb, and Cu were contrary to that of Fe. The formation of FexSbyS impeded the oxidation and volatilization of antimony compounds. As a result, more antimony was retained in the grain during the oxidation process and then transformed into the crude lead-antimony alloy. The microprobe analysis of the metallic core of the partially oxidized jamesonite grain revealed that the PbS was preferentially oxidized to give metals. Investigations on crude lead-antimony alloy indicated that impurities of iron and copper presented as FeSb, FeSb, and CuSb forms.
- Subjects
SULFOSALTS; LEAD alloys; PHASE transitions; OXYGEN; SMELTING; SCANNING electron microscopy
- Publication
JOM: The Journal of The Minerals, Metals & Materials Society (TMS), 2018, Vol 70, Issue 1, p41
- ISSN
1047-4838
- Publication type
Article
- DOI
10.1007/s11837-017-2635-9