The impact of iron sulfide on lead recovery at the giant Navan Zn-Pb orebody, Ireland
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Date
2014
Authors
Barker, G.
Gerson, A.R.
Menuge, J.F.
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Journal article
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International Journal of Mineral Processing, 2014; 128:16-24
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It has been proposed that blending of Navan Conglomerate Group Ore (CGO)with Pale Beds Ore (PBO), the latter which floats well in isolation, results in suboptimalPb recovery with increased abundance of pyrite reporting to the concentrate and increased abundance of galena reporting to the tails.
QEMSCAN data indicate that poor liberation of galena particles is not the primary cause of sub-optimal recovery of galena. Rather, principal component analysis (PCA) of time of flight secondary ion mass spectrometry (ToF-SIMS) reveals that chemically altered surface species interfere with the selectivity and recovery of froth flotation indicating that there is some poisoning of galena mineral surface sparticularly with Fe-containing species possibly leading to loss of recovery. Analysis of the Pb-circuit cleaner tails indicates Pb-species association with sphalerite surfaces,as was observed for the flotation feed and rougher tails but with insufficient induced hydrophobicity by Pb-collector interaction for flotation. A small population of relatively clean galena surfaces is also observed which may result from low bubble particle collision efficiency or insufficient liberation.
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Copyright 2014 Elsevier B.V.
Access Condition Notes: Postprint available 10 April 2016