Study of butyl-amine nanocrystal cellulose in the flotation of complex sulphide ores |
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Author: | Lopéz, Raquel1; Jordão, Helga1; Hartmann, Robert2; |
Organizations: |
1CERENA, Instituto Superior Técnico, Universidade de Lisboa Av. Rovisco Pais, 1049-001 Lisboa, Portugal 2Department of Chemical and Metallurgical Engineering, School of Chemical Engineering, Aalto University, Helsinki, Finland 3Fibre and Particle Engineering Research Unit, University of Oulu, Finland |
Format: | article |
Version: | accepted version |
Access: | open |
Online Access: | PDF Full Text (PDF, 1.9 MB) |
Persistent link: | http://urn.fi/urn:nbn:fi-fe2019082725796 |
Language: | English |
Published: |
Elsevier,
2019
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Publish Date: | 2021-07-08 |
Description: |
AbstractFroth 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. see all
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Series: |
Colloids and surfaces. A, Physicochemical and engineering aspects |
ISSN: | 0927-7757 |
ISSN-E: | 1873-4359 |
ISSN-L: | 0927-7757 |
Volume: | 579 |
Article number: | 123655 |
DOI: | 10.1016/j.colsurfa.2019.123655 |
OADOI: | https://oadoi.org/10.1016/j.colsurfa.2019.123655 |
Type of Publication: |
A1 Journal article – refereed |
Field of Science: |
215 Chemical engineering |
Subjects: | |
Funding: |
This work was conducted as part of the ERA-MIN CELMIN-project supported by the Finnish Agency for Technology and Innovation (Business Finland), the Portuguese National Funding Agency for Science, Research and Technology (FCT) and the Executive Agency for Higher Education, Research, Development and Innovation Funding, Romania (UEFISCDI). The authors are grateful to CERENA, through the strategic Project UID/ECI/04028/2019, Sojitz Beralt Tin & Wolfram and to Rui Semeano for the contributions to the study. |
Copyright information: |
© 2019 Elsevier B.V. All rights reserved. |