University of Oulu

Miika Peltoniemi, Rita Kallio, Antti Tanhua, Saija Luukkanen, Paavo Perämäki, Mineralogical and surface chemical characterization of flotation feed and products after wet and dry grinding, Minerals Engineering, Volume 156, 2020, 106500, ISSN 0892-6875, https://doi.org/10.1016/j.mineng.2020.106500

Mineralogical and surface chemical characterization of flotation feed and products after wet and dry grinding

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Author: Peltoniemi, Miika1; Kallio, Rita1; Tanhua, Antti1;
Organizations: 1University of Oulu, Oulu Mining School, Erkki Koiso-Kanttilankatu V2, FI-90014 Oulu, Finland
2University of Oulu, Research Unit of Sustainable Chemistry, Finland
Format: article
Version: published version
Access: open
Online Access: PDF Full Text (PDF, 16.7 MB)
Persistent link: http://urn.fi/urn:nbn:fi-fe2020091469470
Language: English
Published: Elsevier, 2020
Publish Date: 2020-09-14
Description:

Abstract

Wet processing after crushing is common practice in mineral processing circuits involving flotation but the need for more efficient water management has increased interest towards dry processing. In this study the effects of both wet and dry grinding on flotation of one sulphidic and one non-sulphidic ore were compared. Bench scale flotation tests were carried out and various microscopic and spectroscopic methods such as FESEM and XPS were used in characterization of flotation feeds and products. Bulk surface charge properties were tested with mass titration.

Clear differences in surface properties and flotation results were observed from the wet and dry grinding methods, which encourages further research. Wet grinding was beneficial for the energy efficiency for both ores and promoted the selectivity of flotation particularly with sulphidic ore. The wear of the mill and grinding media seemed more extensive in wet grinding. Dry grinding produced more fine particles tightly attached to the surfaces, caused by the higher surface charge of the dry ground ore especially with non-sulphidic ore.

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Series: Minerals engineering
ISSN: 0892-6875
ISSN-E: 1872-9444
ISSN-L: 0892-6875
Volume: 156
Article number: 106500
DOI: 10.1016/j.mineng.2020.106500
OADOI: https://oadoi.org/10.1016/j.mineng.2020.106500
Type of Publication: A1 Journal article – refereed
Field of Science: 116 Chemical sciences
222 Other engineering and technologies
Subjects:
XPS
Funding: This study was supported by a grant from the K.H. Renlund’s Foundation.
Copyright information: © 2020 The Authors. Published by Elsevier Ltd. This is an open access article under the CC BY-NC-ND license (http://creativecommons.org/licenses/BY-NC-ND/4.0/).
  https://creativecommons.org/licenses/by-nc-nd/4.0/