Title

Depression of Pyrite in Polymetallic Sulfide Flotation using Chitosan-Grafted-Polyacrylamide

Abstract

Chitosan-grafted-polyacrylamide (Chi-g-PAM) was tested as a potential depressant of pyrite in the bulk flotation of galena from a complex sulfide ore containing galena, chalcopyrite, sphalerite, and pyrite. Laboratory scale froth flotation tests were carried out in the presence/absence of Chi-g-PAM, sodium cyanide (industrially used pyrite depressant), chitosan, and polyacrylamide (PAM) at 50 g/t where sodium isopropyl xanthate was used as a collector. The following order of galena flotability (Gf) was observed: Gf /Chi-g-PAM > Gf /Chitosan > Gf /PAM > Gf /NaCN. Zeta potential measurements and adsorption density studies of polymer at mineral/liquid interface verified that Chi-g-PAM had a preferential adsorption onto pyrite as compared to galena. Results obtained from this work suggested that Chi-g-PAM could potentially be used to replace toxic inorganic depressants at the same time improving recovery and grade of galena (PbS) in the flotation concentrates.

Meeting Name

MineXchange 2020 SME Annual Conference and Expo (2020: Feb 23-26, Phoenix, AZ)

Department(s)

Mining Engineering

Document Type

Article - Conference proceedings

Document Version

Citation

File Type

text

Language(s)

English

Rights

© 2020 Society for Mining, Metallurgy and Exploration (SME), All rights reserved.

Publication Date

01 Jan 2020

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