Surface Modification of Pentlandite and Serpentine with Reagents and Magnetite for Magnetic Separation

In this study, selective magnetic coating was employed to separate pentlandite and serpentine. The surface properties of minerals with and without reagents and magnetite were characterized by zeta potential measurements, scanning electron microscopy (SEM), Fourier transform infrared spectroscopy (FT...

Full description

Saved in:
Bibliographic Details
Published in:JOM (1989) 2018-07, Vol.70 (7), p.1124-1129
Main Authors: Lu, Jiwei, Yuan, Zhitao, Tong, Zhongyun, Qi, Shengliang, Li, Lixia
Format: Article
Language:English
Subjects:
Alliances
Application of Advanced Characterization Techniques for Engineering Materials
Chemistry/Food Science
Coating
Earth Sciences
Engineering
Environment
Fourier transforms
Infrared spectroscopy
Investigations
Machinery
Magnetic fields
Magnetic properties
Magnetic separation
Magnetic tape
Magnetism
Magnetite
Minerals
Nickel ores
Pentlandite
Physics
Reagents
Scanning electron microscopy
Selective adsorption
Serpentine
Spectrum analysis
Surface properties
Zeta potential
Citations: Items that this one cites
Items that cite this one
Online Access:Get full text
Tags: Add Tag
No Tags, Be the first to tag this record!
Description
Summary:In this study, selective magnetic coating was employed to separate pentlandite and serpentine. The surface properties of minerals with and without reagents and magnetite were characterized by zeta potential measurements, scanning electron microscopy (SEM), Fourier transform infrared spectroscopy (FTIR), and vibrating sample magnetometer (VSM). Zeta potentials showed that the surfaces of serpentine and magnetite were both negatively charged with the addition of sodium hexametaphosphate. Thus, serpentine was hardly coated by magnetite due to the electrostatic repulsion between them. The results of SEM and FTIR demonstrated that a magnetic coating of magnetite was observed on the pentlandite rather than on the serpentine. The VSM measurements confirmed that the magnetism of pentlandite was increased significantly due to the selective adsorption of magnetite on its surfaces; therefore, pentlandite was successfully separated from serpentine by magnetic separation. The study shows that selective magnetic coating technology has the alternative potential to separate pentlandite from serpentine.
ISSN:1047-4838
1543-1851
DOI:10.1007/s11837-018-2916-y