Flocculants play an important role in the solid-liquid separation of tailings slurry, and its dosage directly impacts on the dewatering efficiency of tailings. Herein, the influence of ultrasonication on flocculant dosage in dehydration process of unclassified tailings was studied. The effects of flocculant dosage on initial settling rate (ISR), …
Mineral processing is water intensive – detailed understanding of all water flows and interactions is needed
Inorganic turbidity can limit light penetration in water and reduce phytoplankton photosynthesis. Anthropogenic activities such as mining can produce or...
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The generated tailings in the mining sector are mostly disposed through conventional tailings management systems (e.g., storing in tailings dams). Due to the depletion of global ore deposits and new environmental rules, it is inevitable to consider new tailings management systems including recycling and reuse. It is believed that tailings …
The solid fraction, flocculant dosage, flocculant concentration, and shear rate were selected as the factor. Likewise, the maximum square-weighted mean chord length of tailings floc, initial settling rate of the suspension-supernate interface, and turbidity of supernate were selected to characterize the flocculation and settling process.
Turbidity is a measurement of water clarity that is determined by the amount of light scattered by suspended solids and dissolved colored material.
Efficient thickening of tailings is a prerequisite for the metal mine tailings backfill and surface disposal operation. The effective collision of ultrafine tailings particles in suspension with flocculant molecules is essential for flocs aggregates formation and settling. Unreasonable feeding speed and flocculant adding method will lead to the …
The dumping of bauxite tailings into Batata Lake, an Amazonian clear-water lake, generated high levels of turbidity and caused a serious decrease in phytoplankton densities, which could possibly be the result of a photosynthetic limitation due to light attenuation together with an increase in algal sinking due to the adhesion of clay …
The debris flows deposited a localized debrite with a hummocky surface composed of fine tailings and coarse displaced fan-delta and fluvial sediment. A flat, featureless, surface composed of fine-grained sediment adjacent to the debrite is interpreted as debrite/turbidite resulting from debris flows proximally and turbidity …
Deep sea mining tailings disposal is a new environmental challenge related to water pollution, mineral crust waste handling, and ocean biology. The objective of this paper is to propose a new tailings disposal …
A Guide to the Management of Tailings Facilities (the Tailings Guide) is designed to be applied by MAC members and non-MAC members alike, anywhere in the world. The Tailings Guide provides guidance on responsible tailings management, helps companies develop and implement site-specific tailings management systems, and improves …
Rapid flocculation and settlement (FS) of mine tailings is significant for the improvement and development of the filling process, whereas the settlement velocity (SV) of tailings in FS has been recognized as a key parameter to evaluate the settlement effect. However, the influence of temperature on the SV and its mechanism have not been …
Determination of an acceptable lower bound, large strain undrained shear strength of tailings is fundamental for evaluating the stability tailings storage facilities comprising loosely deposited ...
Mine tailings used in geopolymers are primarily composed of a combination of mineral particles of diverse sizes – ranging from silt and clay fractions to heavy sandy fractions – with varying degrees of agglomeration.
Here, we investigated the effects of inorganic turbidity on phytoplankton chlorophyll content and composition caused by sediments from two areas in Lake Batata, one natural and the other impacted by bauxite tailings.
The settling behaviour of Etiholding Kirka Borax Concentrator tailings has been investigated using different types of anionic and nonionic polymers and coagulants as well. The most effective ...
Electrocoagulation can be effectively used in the elimination of the colloids from the tailings of the mineral industries. Owing to the numerous operational parameters of this physicochemical process, the best engineering technique for the characterization of the process is RSM. In this chapter, a non-transformed quadratic model is firstly formed …
The tables in this document summarize the values and key information from each of the guidelines. Health Canada updates the summary tables regularly, but you should always consult individual guideline technical …
The results of this work will facilitate the development of improved, cost-effective management of clay-rich mineral waste tailings, maximum process water recovery for recycle and reduced environmental footprint and risk associated with handling and impoundment of tailings.
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In addition, this amount of tailings discharged to the deep oceans is unlikely to exceed the natural deep-sea mineral deposits associated with hydrothermal vein systems in mid-ocean ridges.
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The tailings flocculation is significantly affected by the feed solid concentration and flow characteristics, however, it is difficult to capture the local solid concentration and the resulting variation in flow characteristics by a conventional experimental approach.
The catastrophic August 2014 Mount Polley tailings spill, the second largest ever documented, sent ~18 Mm 3 of waste plunging to the bottom of the >100 m deep West Basin of Quesnel Lake, British Columbia, a critical West Coast salmon habitat. To understand the impact of the spill on the lake, including the fate of suspended solids, we …
A combination of several different circular economy approaches (reduce, reprocess, upcycle, downcycle and dispose for future) is needed to manage the waste streams in mining in a holistic way. Various technologies are already in use for the recovery of metals from the tailings and for the use of the mineral residues in high and low-value …
On the one hand, the global floc strength measurement (Mikkelsen and Keiding, 2002) compares the turbidity of the supernatant before and after shearing of a sludge sample. Lower turbidity after shearing indicates better bioflocculation. On the other hand, relative hydrophobicity and surface charge can be measured.
Customer challenge On the mineral processing process the thickening stage is very relevant, both concentrate and tailings are needed with the lowest possible water Minera Valle Central offers integral solutions to the problem of tailings, including the design of storage, processing, transportation and redeposition facilities, as well as
The objective of solid-liquid separation in thickeners in coal preparation plants is to obtain both a clear supernatant liquid with a low turbidity for reuse and a dense slurry. It is important for the smooth operation of the plant to produce good-quality recirculation water. In this study, settling characteristics of coal tailings (d 80 =70 µm) taken from the …
Global mineral resource exploitation produces over 14 billion tons of tailings per year, which are generally deposited on the surface, leading to significant environmental pollution and resource ...
The tailings management component of TSM provides a strong and consistent message to tailings facility owners, operators and contractors: the key to safe and environmentally responsible management of tailings is the consistent application of sound engineering
The use of saline water may negatively (or positively) affect the settling behaviour of clay particles in the tailings and therefore the turbidity of the recycled water. However, to date, research has focused mainly on the dewatering behaviour of tailings in fresh water. This means that the settling rate of saline tailings remains poorly ...
The tables in this document summarize the values and key information from each of the guidelines. Health Canada updates the summary tables regularly, but you should always consult individual guideline technical documents and guidance documents available on the website Water Quality - Reports and Publications for the most current information.
