Artigo Revisado por pares

PRIMARY PHASES IN PYROMETALLURGICAL SLAGS FROM A ZINC-SMELTING WASTE DUMP, SWIETOCHLOWICE, UPPER SILESIA, POLAND

2007; Mineralogical Association of Canada; Volume: 45; Issue: 5 Linguagem: Inglês

10.2113/gscanmin.45.5.1189

ISSN

1499-1276

Autores

Jacek Puziewicz, K. Zainoun, Hubert Bril,

Tópico(s)

Minerals Flotation and Separation Techniques

Resumo

Zinc smelting at Świetochlowice, in Upper Silesia, Poland, produced a 15 ha waste dump, which is dominated by silicate slags, representing 1200–1300°C silicate melt generated during zinc extraction. The high ratio of silicate network-modifying to network-forming cations resulting in low viscosity of the melt enabled the crystallization of a holocrystalline assemblage of phases. The main phases present in the slag are silicates, mostly synthetic analogues of olivine, melilite, pyroxene, feldspars, willemite and of the oxides zincite and spinel-group phases. The silicate and oxide phases contain variable amounts of Zn, and melilite and K-feldspar also contain Pb. Willemite was the first phase to crystallize in Zn-rich slags, which are thus considered to be “Zn-saturated”. The Zn poor (“Zn-undersaturated”) slags do not contain any Zn-phase, and zinc is preferably concentrated in melilite. Pyroxene is a sink for Zn where the composition of the melt does not allow melilite to crystallize. The phase assemblages occurring in the slags from Świetochlowice are similar to those described in other Zn-smelting slags. Two “facies”, “Zn-saturated” and “Zn-undersaturated”, relating bulk-slag composition to phase assemblages, can be defined for the Świetochlowice and other Zn-smelting slags.

Referência(s)
Altmetric
PlumX