Microscopic Study of the Phase Transformation During the Oxygen-Enriched Direct Smelting of Jamesonite Concentrate

作者：Chen, Min; Dai, Xi^*

来源：JOM, 2018, 70(1): 41-46.

DOI：10.1007/s11837-017-2635-9

• SB
• ANTIMONY
• LEAD

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 FeSb2, FeSb, and Cu2Sb forms.

• 出版日期2018-1
• 单位中南大学