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3 results on '"Copper beneficiation"'

1. Study of butyl-amine nanocrystal cellulose in the flotation of complex sulphide ores

Author

Lopéz, R. (Raquel), Jordão, H. (Helga), Hartmann, R. (Robert), Ämmälä, A. (Ari), Carvalho, M. T. (M. Teresa), Lopéz, R. (Raquel), Jordão, H. (Helga), Hartmann, R. (Robert), Ämmälä, A. (Ari), and Carvalho, M. T. (M. Teresa)

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.

Published
2019

2. Study of butyl-amine nanocrystal cellulose in the flotation of complex sulphide ores

Author

M. Teresa Carvalho, Ari Ämmälä, Helga Jordão, Raquel Lopéz, Robert Hartmann, University of Lisbon, Department of Chemical and Metallurgical Engineering, University of Oulu, Aalto-yliopisto, and Aalto University

Subjects
Copper beneficiation, 02 engineering and technology, engineering.material, 010402 general chemistry, 01 natural sciences, chemistry.chemical_compound, Colloid and Surface Chemistry, Selective froth flotation, Cellulose, Froth flotation, Cellulose-based reagent, Iberian Pyrite Belt, Mineral, Chalcopyrite, Beneficiation, 021001 nanoscience & nanotechnology, 0104 chemical sciences, Sulphide ores, stomatognathic diseases, Sphalerite, chemistry, Chemical engineering, visual_art, Panasqueira, engineering, visual_art.visual_art_medium, 0210 nano-technology
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.

Published
2019

3. Study of butyl-amine nanocrystal cellulose in the flotation of complex sulphide ores.

Author

Lopéz, Raquel, Jordão, Helga, Hartmann, Robert, Ämmälä, Ari, and Carvalho, M. Teresa

Subjects
*SULFIDE minerals, *SPHALERITE, *SULFIDES, *ORES, *FLOTATION, *SULFATE pulping process, *MINERAL collectors, *THIOLS
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. [ABSTRACT FROM AUTHOR]

Published
2019
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