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Biodegradable hematite depressants for green flotation separation – An overview
Department of Mining and Metallurgical Engineering Yazd University, Yazd 89195-741, Iran.
Department of Materials Engineering, The University of British Columbia, Vancouver, BC V6T 1Z4, Canada.
School of Mining Engineering, College of Engineering, University of Tehran, Tehran, Iran.
Department of Material Science and Engineering (Mining and Mineral Processing Engineering), African University of Science and Technology Abuja, Nigeria.
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2023 (English)In: Minerals Engineering, ISSN 0892-6875, E-ISSN 1872-9444, Vol. 199, article id 108114Article, review/survey (Refereed) Published
Abstract [en]

Due to environmental issues and the restrictions imposed on mineral flotation separation, the use of biodegradable and environmentally friendly reagents has gained widespread international attention. So far, several investigations have been conducted regarding the eco-friendly flotation separation of iron oxide ores for moving toward sustainable development and cleaner production. Yet, no critical review is specified on the green and eco-friendly depression reagents through their reverse flotation beneficiation. Therefore, this study will comprehensively discuss the previously conducted works in this area and provides suggestions for future assessments and developments. This robust study explored various adsorption aspects of natural-based depressants (polysaccharide-, polyphenolic-, and lignosulfonate-based) on iron oxide minerals (mainly hematite) to create a possible universal trend for each biodegradable depressant derivative. The laboratory and industrial experiments indicated that these depressants (except lignosulfonate-based) could selectively depress hematite at alkaline pHs and enhance its reverse flotation separation from their gangue phases (especially silicates as the main gangue phases). Although these eco-friendly depressants showed promising metallurgical results, several gaps still need to be addressed, notably in surface analyses and their adsorption mechanisms.

Place, publisher, year, edition, pages
Elsevier, 2023. Vol. 199, article id 108114
Keywords [en]
Biodegradable, Depressant, Iron oxides, Green flotation
National Category
Metallurgy and Metallic Materials Mineral and Mine Engineering
Research subject
Mineral Processing; Centre - Centre for Advanced Mining & Metallurgy (CAMM)
Identifiers
URN: urn:nbn:se:ltu:diva-97265DOI: 10.1016/j.mineng.2023.108114Scopus ID: 2-s2.0-85158845706OAI: oai:DiVA.org:ltu-97265DiVA, id: diva2:1758568
Funder
Luleå University of Technology
Note

Validerad;2023;Nivå 2;2023-05-23 (hanlid)

Available from: 2023-05-23 Created: 2023-05-23 Last updated: 2023-09-05Bibliographically approved

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Chelgani, Saeed Chehreh

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