Crystallization Behavior of Copper Smelter Slag During Molten Oxidation

Yong Fan, Etsuro Shibata, Atsushi Iizuka, Takashi Nakamura

研究成果: Article査読

25 被引用数 (Scopus)

抄録

Copper slag is composed of iron silicate obtained by smelting copper concentrate and silica flux. One of the most important criteria for the utilization of this secondary resource is the recovery of iron from the slag matrix to decrease the volume of dumped slag. The molten oxidation process with crushing magnetic separation appears to be a more sustainable approach and is based on directly blowing oxidizing gas onto molten slag after the copper smelting process. In the current study, using an infrared furnace, the crystallization behavior of the slag during molten oxidation was studied to better understand the trade-off between magnetite and hematite precipitations, as assessed by X-ray diffraction (using an internal standard). Furthermore, the crystal morphology was examined using a laser microscope and Raman imaging system to understand the iron oxide transformation, and the distribution of impurities such as Cu, Zn, As, Cr, and Pb were complemented with scanning electron microscopy and energy dispersive spectroscopy. In addition, the reaction mechanism was investigated with a focus on the oxidation processes.

本文言語English
ページ(範囲)2158-2164
ページ数7
ジャーナルMetallurgical and Materials Transactions B: Process Metallurgy and Materials Processing Science
46
5
DOI
出版ステータスPublished - 2015 10 25

ASJC Scopus subject areas

  • 凝縮系物理学
  • 材料力学
  • 金属および合金
  • 材料化学

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