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Minerals
Special Issues
Flocculation Process of Tailings
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Flocculation Process of Tailings

A special issue of Minerals (ISSN 2075-163X). This special issue belongs to the section "Mineral Processing and Extractive Metallurgy".

Deadline for manuscript submissions: closed (20 March 2021) | Viewed by 2850

Special Issue Editor

Prof. Dr. Pedro G. Toledo

E-Mail Website1 Website2
Guest Editor
1. Department of Chemical Engineering and Laboratory of Surface Analysis (ASIF), Universidad de Concepción, PO Box 160-C, Correo 3, Concepción, Chile
2. Water Center for Agriculture and Mining (CRHIAM), Victoria 1295, Barrio Universitario, Concepción, Chile
Interests: seawater in mining; water treatment; physical-chemistry and rheology of tailings; lithium recovery from brines and ores; ab initio modeling of mineral surfaces; molecular dynamics of mineral-water interfaces; molecular design of additives; pore-scale modeling of multiphase flow in porous materials; particle fluidization modeling for dry mining

Special Issue Information

Dear Colleagues,

Water is the key element that enables the various activities involved in mineral processing. The largest mining operations occur in countries with a water shortage, which in some regions is severe. The scenario is complicated, considering that some reservoirs have been exploited for decades, and their grades are currently low, which increases the water demand and favors the generation of tailings. Therefore, the sustainability of the industry urgently requires solutions that maximize the recycling of water from the tailings to the concentrator units, significantly reducing the freshwater footprint in the process.

This Special Issue of Minerals aims to summarize cutting-edge research work on tailings flocculation at all scales, from molecules to sites. Advances are welcome on seawater use, raw or desalted, flocculation aided by green chemistry, and filtration and ultra-flocculation operations.

Prof. Dr. Pedro G. Toledo
Guest Editor

Manuscript Submission Information

Manuscripts should be submitted online at www.mdpi.com by registering and logging in to this website. Once you are registered, click here to go to the submission form. Manuscripts can be submitted until the deadline. All submissions that pass pre-check are peer-reviewed. Accepted papers will be published continuously in the journal (as soon as accepted) and will be listed together on the special issue website. Research articles, review articles as well as short communications are invited. For planned papers, a title and short abstract (about 100 words) can be sent to the Editorial Office for announcement on this website.

Submitted manuscripts should not have been published previously, nor be under consideration for publication elsewhere (except conference proceedings papers). All manuscripts are thoroughly refereed through a single-blind peer-review process. A guide for authors and other relevant information for submission of manuscripts is available on the Instructions for Authors page. Minerals is an international peer-reviewed open access monthly journal published by MDPI.

Please visit the Instructions for Authors page before submitting a manuscript. The Article Processing Charge (APC) for publication in this open access journal is 2400 CHF (Swiss Francs). Submitted papers should be well formatted and use good English. Authors may use MDPI's English editing service prior to publication or during author revisions.

Keywords

  • Tailings
  • Seawater
  • Flocculation
  • Ultra-flocculation
  • Sedimentation
  • Rheology
  • Water treatment
  • Flocculation polymers and systems
  • Filtration

Published Papers (1 paper)

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Research

16 pages, 7756 KiB  
Article
What Affects Dewatering Performance of High Density Slurry?
by Yunhui Li, Heather Kaminsky, Xue Yuki Gong, Yijia Simon Sun, Mohammed Ghuzi and Ardalan Sadighian
Minerals 2021, 11(7), 761; https://doi.org/10.3390/min11070761 - 14 Jul 2021
Cited by 3 | Viewed by 2350
Abstract
The dewatering of flocculated high density slurry presents a significant challenge to most mining industries. The new technologies to treat high density slurry require a consistent and robust flocculation method in order to enter the market of tailings management. The flocculation of high [...] Read more.
The dewatering of flocculated high density slurry presents a significant challenge to most mining industries. The new technologies to treat high density slurry require a consistent and robust flocculation method in order to enter the market of tailings management. The flocculation of high density slurry, however, due to its complexity, is always a challenge to be undertaken appropriately and to evaluate the dewatering performance correctly. This paper probes the complexity by using a torque-controlled mixing technique to demonstrate the influence of feed properties, polymer type, polymer dosage, and mixing conditions on dewatering performance. The study shows that flocculant should be dosed at the optimal range to achieve the highest dewatering performance. A full dosage responsive curve including under dosage, optimal dosage, and overdosage is critical to evaluate the dewatering performance of high density slurries and flocculants. The mixing conditions such as mixing speed, mixing time, and geometry of the mixing impeller affect the flocculation efficacy. It was found that the dewatering performance of high density slurry is sensitive to solids content, water chemistry, and clay activity. High sodicity and high clay activity in the high density slurry decreases the dewatering performance. Therefore, it is critical to evaluate flocculants across multiple feeds and dosages with replication in order to select optimal dewatering performance. Using multiple key performance indicators (KPIs) to build technical and economic criteria is also critical for polymer evaluation. Full article
(This article belongs to the Special Issue Flocculation Process of Tailings)
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