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Characterization of...
Characterization of Double Leached Waelz Oxide for Identification of Fluoirde Mineral
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- Sar, Suchandra (författare)
- Luleå tekniska universitet,Mineralteknik och metallurgi
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- Sundqvist Ökvist, Lena (författare)
- Luleå tekniska universitet,Mineralteknik och metallurgi
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- Sparrman, Tobias (författare)
- Umeå universitet,Kemiska institutionen,Umeå University
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- Engström, Fredrik (författare)
- Luleå tekniska universitet,Mineralteknik och metallurgi
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- Samuelsson, Caisa (författare)
- Luleå tekniska universitet,Mineralteknik och metallurgi
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(creator_code:org_t)
- 2019-03-20
- 2019
- Engelska.
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Ingår i: Metals. - : MDPI. - 2075-4701. ; 9:3
- Relaterad länk:
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https://doi.org/10.3...
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https://ltu.diva-por... (primary) (Raw object)
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https://www.mdpi.com...
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https://umu.diva-por... (primary) (Raw object)
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https://urn.kb.se/re...
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https://doi.org/10.3...
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https://urn.kb.se/re...
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Abstract
Ämnesord
Stäng
- Double leached Waelz oxide (DLWO), with 76% zinc, is a secondary zinc containing raw materials obtained by the treatment of electric arc furnace dust. The content of fluoride in DLWO is still too high for direct leaching, as fluoride has a detrimental effect on electrowinning for zinc production. Knowledge of the characteristics of DLWO, and especially on how a fluoride mineral might exist, can contribute to further improvement of the selective leaching for the removal of fluoride. In this study, DLWO was characterized using analytical techniques, such as inductively coupled plasma-optical emission spectroscopy (ICP-OES), 19F liquid-state nuclear magnetic resonance (19F LS NMR), X-ray powder diffraction analysis (XRD), scanning electron microscopy coupled with energy dispersive spectroscopy (SEM-EDS) and 19F solid-state nuclear magnetic resonance (19F SS NMR). This study showed that DLWO mainly consisted of zincite (ZnO), cerussite (PbCO3) and a spinel containing zinc, iron and manganese. The fluoride mineral identified was calcium fluoride (CaF2). In SEM analysis, fluorine was found in larger grains together with calcium and oxygen, which was possibly calcium carbonate.
Ämnesord
- TEKNIK OCH TEKNOLOGIER -- Materialteknik -- Metallurgi och metalliska material (hsv//swe)
- ENGINEERING AND TECHNOLOGY -- Materials Engineering -- Metallurgy and Metallic Materials (hsv//eng)
- NATURVETENSKAP -- Geovetenskap och miljövetenskap -- Geokemi (hsv//swe)
- NATURAL SCIENCES -- Earth and Related Environmental Sciences -- Geochemistry (hsv//eng)
Nyckelord
- metal recycling
- zinc secondary dust material
- characterization of double leached Waelz oxide
- halogens
- fluoride identification
- Process Metallurgy
- Processmetallurgi
Publikations- och innehållstyp
- ref (ämneskategori)
- art (ämneskategori)
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