Study of butyl-amine nanocrystal cellulose in the flotation of complex sulphide ores
No Thumbnail Available
Access rights
openAccess
URL
Journal Title
Journal ISSN
Volume Title
A1 Alkuperäisartikkeli tieteellisessä aikakauslehdessä
This publication is imported from Aalto University research portal.
View publication in the Research portal (opens in new window)
Other link related to publication (opens in new window)
View publication in the Research portal (opens in new window)
Other link related to publication (opens in new window)
Date
2019-10-20
Major/Subject
Mcode
Degree programme
Language
en
Pages
Series
Colloids and Surfaces A: Physicochemical and Engineering Aspects, Volume 579
Abstract
Froth flotation is a widely used process for the beneficiation of complex sulphide ores. Thiol collectors (mostly xanthates) are usually effective collectors for sulphide minerals but may have a low selectivity between different sulphide minerals when associated in complex sulphide ores. Additionally, a concern is their suggested harmfulness on human health and impact on the environment. In this study, a green sustainable reagent, butyl-amine cellulose (BAC), was synthesized from hardwood kraft pulp, a renewable abundant resource, for the selective separation of chalcopyrite and sphalerite. The performance evaluation was made using samples of two ores containing chalcopyrite and sphalerite, one was from Panasqueira mine (Portugal) and the other with a different mineral association (from the massive sulphide deposits of the Iberian Pyrite Belt). The study demonstrated that when chalcopyrite is associated with sphalerite, BAC is selective for chalcopyrite, i.e., it is a collector for this mineral and not for sphalerite. The recovery of chalcopyrite in the floated product was a function of interaction between BAC concentration and pulp pH. The study showed that the novel cellulose-based collector had a better performance than the reagents used in the industrial flotation of Panasqueira ore.Description
Keywords
Cellulose-based reagent, Copper beneficiation, Selective froth flotation, Sulphide ores
Other note
Citation
Lopéz , R , Jordão , H , Hartmann , R , Ämmälä , A & Carvalho , M T 2019 , ' Study of butyl-amine nanocrystal cellulose in the flotation of complex sulphide ores ' , Colloids and Surfaces A: Physicochemical and Engineering Aspects , vol. 579 , 123655 . https://doi.org/10.1016/j.colsurfa.2019.123655