Skip directly to search Skip directly to A to Z list Skip directly to page options Skip directly to site content

NIOSHTIC-2 Publications Search

Search Results

The effect of oxidation on sulfide mineral flotation.

Authors
Kotlyar-DG; Tolley-WK
Source
SME Annual Meeting, February 15-18, 1993, Reno, Nevada. Littleton, CO: Society for Mining, Metallurgy, and Exploration, Inc., preprint 93-20, 1993 Feb; :1-8
Link
NIOSHTIC No.
10003837
Abstract
Oxidized sulfide minerals, commonly formed by weathering, increasingly are becoming important resources as primary sulfide deposits are depleted. Oxidation, in general, reduces selectivity and recovery in flotation. The objective of this research was to determine the mechanisms of oxidation and collector adsorption in sulfide systems as a step towards developing improved technologies for beneficiation of oxidized sulfides. Data from microcell flotation tests are combined with electrochemical and spectrophotometric measurements. The adsorption of ethyl xanthate (EX) on oxidized sulfides was characterized using AC impedance techniques and correlated to flotation response. The floatability of chalcocite, chalcopyrite and pyrite was dependent on the extent of oxidation. Oxidation for 1?) d at 65? C inhibited flotation of chalcocite, and chalcopyrite even after the addition of a large amount (1 x 10') M) of collector. Heavily oxidized (27 d) chalcocite remained unfloatable. However, longer oxidation of pyrite and chalcopyrite restored the floatability. Oxidation resulted in an electrically resistive, nonporous surface layer.
Keywords
Mining-industry; Sulfides; Oxides; Minerals
Publication Date
19930201
Document Type
Conference/Symposia Proceedings
Fiscal Year
1993
NTIS Accession No.
NTIS Price
Identifying No.
OP 30-93
NIOSH Division
SLRC
Source Name
SME Annual Meeting, February 15-18, 1993, Reno, Nevada
State
UT; NV
TOP