THE MINERALOGY AND WEATHERING OF SLAG PRODUCED BY THE SMELTING OF LATERITIC Ni ORES, SZKLARY, SOUTHWESTERN POLAND
| Autor: | Jacek Puziewicz, Catherine Neel, Hubert Bril, Jakub Kierczak |
|---|---|
| Rok vydání: | 2009 |
| Předmět: | |
| Zdroj: | The Canadian Mineralogist. 47:557-572 |
| ISSN: | 1499-1276 0008-4476 |
| Popis: | Three kinds of slags occur in the waste dump of pyrometallurgical slags produced during reworking of lateritic ores of Ni in Szklary, Lower Silesia, southwestern Poland. Slags 1 and 2 contain 34–44 wt.% SiO2, and slag 2 is enriched in Ca and impoverished in Fe relative to slag 1; slag 3 is characterized by extreme Ca content ( ca. 50 wt.% CaO). The slags consist of silicate glass, synthetic equivalents of clinopyroxenes (diopside, hedenbergite), melilite, olivines (forsterite, fayalite) and subordinate spinel (chromite), sulfides (pyrrhotite, pentlandite, heazlewoodite, digenite) and intermetallic compounds (awaruite, bronze, metallic Fe and Cu). One type of slag contains significant amounts of the potentially toxic elements (PTE) Co (>380 ppm), Cr (>6400 ppm), Ni (>4000 ppm) and Zn (>352 ppm). The phase assemblages and textures in the Szklary slags are similar to those in other pyrometallurgical slags produced during reworking of silicate and sulfide ores, but they contain fewer sulfides. Although the slags have been exposed to atmospheric conditions for 30–80 years, those occurring in the dump are not affected by weathering, and small vitreous fragments of slag occurring in nearby agricultural fields have only thin ( |
| Databáze: | OpenAIRE |
| Externí odkaz: |
|