Mineralogy of Ga- and Ge-bearing metallurgical slags from Tsumeb (Namibia)

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Marco E. Ciriotti
Messaggi: 31675
Iscritto il: ven 25 giu, 2004 11:31
Località: via San Pietro, 55 I-10073 Devesi/Cirié TO - Italy
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Mineralogy of Ga- and Ge-bearing metallurgical slags from Tsumeb (Namibia)

Messaggio da Marco E. Ciriotti » mer 10 nov, 2021 9:13

Prossima pubblicazione.

Referenza:
▪ Ettler, V., Mihaljevič, M., Strnad, L., Jedlicka, R., Kříbek, B., Bowell, R.J., Kamona, F., Mapani, B. (2021): Mineralogy of Ga- and Ge-bearing metallurgical slags from Tsumeb (Namibia). Mineralogical Magazine, 85, (in press).

Abstract:
Gallium (Ga) and germanium (Ge) are technologically important critical elements. Lead blast furnace slags from Tsumeb (Namibia) comprise over two million metric tons of material that contains high levels of Ga (135-156 ppm) and Ge (128-441 ppm) in addition to significant Zn concentrations (up to 11 wt.%) and represent a potential resource for these elements. A combination of mineralogical and chemical methods (PXRD, FEG-SEM- EPMA, LA-ICP-MS) indicated different partitioning of Ga and Ge within the individual slag phases. Gallium is predominantly bound in small euhedral crystals of Zn-Fe-Al spinels (<10 µm in size), exhibiting concentrations in the range of 480-1370 ppm (up to 0.004 atoms per formula unit, apfu). Concentrations of Ga in other phases (e.g., melilite) are systematically below 90 ppm. The principal host of Ge is the silicate glass and, to a lesser extent, silicates (melilite, olivine group phases). Concentrations of Ge in glass attained a concentration of 470 ppm (EPMA), but the LA-ICP-MS analysis of glass matrix containing submicrometric spinel crystallites indicated that average Ge levels vary in the range of 113-394 ppm. In the potential extraction of Ga and Ge, the results indicate that ultrafine milling is needed to liberate the Ga- and Ge-hosting phases prior to metallurgical processing of slag.
Marco E. Ciriotti

«Things are interesting only in so far as they relate themselves to other things»

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Marco E. Ciriotti
Messaggi: 31675
Iscritto il: ven 25 giu, 2004 11:31
Località: via San Pietro, 55 I-10073 Devesi/Cirié TO - Italy
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Re: Mineralogy of Ga- and Ge-bearing metallurgical slags from Tsumeb (Namibia)

Messaggio da Marco E. Ciriotti » gio 23 dic, 2021 16:17

Pubblicazione effettuata.

Referenza:
▪ Ettler, V., Mihaljevič, M., Strnad, L., Jedlicka, R., Kříbek, B., Bowell, R.J., Kamona, F., Mapani, B. (2021): Mineralogy of Ga- and Ge-bearing metallurgical slags from Tsumeb (Namibia). Mineralogical Magazine, 85, 879-889.
Marco E. Ciriotti

«Things are interesting only in so far as they relate themselves to other things»

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