1 Introduction The rheological properties of flocculated thickened and paste tailings can be altered by breaking the floc-aggregate structures by shearing the mixture. The paper presents the results of test work conducted to investigate the performance of a shear device developed to reduce the rheology of flocculated thickened tailings slurries.
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Abstract. The mining industry is moving towards thickened tailings with higher density than conventional operations. As a result, tailings transportation is more challenging due to the material ...
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The La Quinua mill at the Yanacocha mine in Peru has a thickened tailings storage facility that is contained entirely within an active heap leach pad. In this respect, it is unique and unprecedented in the mining industry and provides the operator, Minera Yanacocha S.R.L. (MYRSL), with certain cost, land-use and closure efficiencies. The …
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The background of the present work is the thickened tailings technology, including the tailings thickening and underflow transport. Generally, the velocity of thickened tailings in the pipeline is relatively low, which results in the shear rate which is less than 100 s − 1 (Franks et al., 2014, Wennberg et al., 2008). 3.2.3.
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Like with thickened and paste tailings, the mechanical dewatering process compared to conventional slurry deposition increases costs. Producing wet and dry cake further increases this cost particularly if high throughputs are required. However, some of the many advantages to using dry stacking of tailings are:
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Paste is generally deposited like thickened tailings to form a conical pile, which generate typically slope angles of 2 – 10% providing the underlying material has stabilised (Theriault, Frostiak et al. 2003). As the layers of paste cease to flow, desiccation can occur producing cracks. The new overlaying flow fills in the cracks and locks ...
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Thickened tailings, defined as mineral wastes that behave as a non-Newtonian fluid, show a small yield stress and release a small amount of water following deposition. Thickening has become an increasingly used option in tailings management. This paper presents a detailed examination of gold mine thickened tailings undergoing …
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Paste 2015, Cairns, Australia 543 The impacts of using thickened tailings on water management and CAPEX of tailings storage facilities Table 2 K Fabian et al. Breakdown of inflows to and outflows from the TSF Water flows Quantity (m3/d) Sulphide plant water demand (for 25% solids slurry) 345,000 Return directly from the thickeners 265,410 ...
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The oil sands mining operations in Alberta have produced billions of m 3 of tailings which must be reclaimed and integrated into various mine closure landforms, including terrestrial landforms. Microorganisms play a central role in nutrient cycling during the reclamation of disturbed landscapes, contributing to successful vegetation restoration …
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Studies indicate thickened paste tailings can reduce tailings dam construction up to 40 percent, both in material quantities and capital costs, and allows …
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The development of the thickened tailings disposal technique presents a new paradigm in tailings disposal. It results in a total revision of the risk profile of a tailings storage facility (TSF), and may provide significant savings in both cost and water consumption. The method was developed by Robinsky (1975), who identified that …
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In thickened tailings technology, the tailings are subject to the dewatering process, where then they flow away from single or different deposition points to form gently sloped self-supporting stacks [].To simulate such slopes in this experimental work, a layer of sand material was, used underneath the thickened tailings deposit, placed inside the …
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Fluid fine tailings (FFT) comprising clayey-silt solids pose environmental and financial challenges. Currently, mining operators are depositing thickened FFT in deep-pits counting on self-weight consolidation to form stable ground. The motivation of this study is to model the long-term prospects of such deposits utilizing consolidation and …
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The present study aims to define the optimum thickening concentration for copper tailings, applied to a case study of representative Chilean mine tailings, from a rheological and energy point of view, as a function of recovered water in the thickeners and specific energy consumption (SEC), transporting one ton of Non-Newtonian thickened tailings.
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Download. Solutions and Applications for Tailings. Tailings Paste Thickening. Copper and Molybdenum Flotation Circuit. Iron Ore - Magnetite. Oil Sands - Open Pit. From increased water recovery to …
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Tailings transport is an integrated element in any wet tailings storage facility (TSF). Tailings from the process plant are often thickened to a moderate or relatively high (but still pumpable ...
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The conventional approach to tailings storage is to thicken the tailings just to the extent that they can be pumped using robust centrifugal pumps by pipeline to a surface tailings …
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There is a growing interest for paste and thickened tailings in the mining industry. In general, thickened tailings deposition leads to a dryer and less segregated material compared to conventional (unthickened) tailings deposition. This implies steeper slopes and tailings with lower water contents.
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Thickeners offer several benefits. For tailings management, they are used to concentrate/thicken the solids in the waste stream to reduce the volume of slurry reporting to the TSF and/or to reduce the …
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Taxonomic profiles of microbial communities in thickened tailings and capping material (PMM) as assessed by sequencing the 16S rRNA gene for bacteria (A–C), and ITS2 region for fungi (D–F). (A,D), taxonomic profiles at the phylum level across all samples for the capping (PMM) and tickened tailings (TT) layers.
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Use of thickened tailings is less costly and has much less environmental impact than conventional tailings because tailings dams and their associated slime ponds are eliminated. In this paper, the resistance to liquefaction due to earthquakes of a proposed bauxite tailings deposit placed at a 2.9° slope is analyzed. The water content of the ...
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In addition, it is known that thickened tailings deposits are built-up in a layer by layer deposition process, where each layer is buried by the subsequent one; this process gives the tailings the ...
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Thickened tailings commonly exhibit non-Newtonian rheological behaviors, such as yielding and thixotropy, which remarkably affect their deposition characteristics. Rheology is an important tool for solving thickened tailings disposal problems (Nguyen and Boger, 1998). Although the single-layer deposition in flume tests has been …
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Thickened tailings, as the name suggests, involves the mechanical process of dewatering low solids concentrated slurry (Fourie 2003). This is normally achieved by using compression (or high … See more
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Dewatering tailings to higher grades than paste produces a stable deposit that typically does not require retention dams and is called a "dry stack." A proposal of different dewatering techniques applied in the fine tailings produced after final desliming phase, obtained from the treating of phosphatic ores, is the main objective of this work. …
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Thickened tailings disposal techniques have commonly been employed in the mining industry across the world for many years, and they remain a legitimate option. Like filtered tailings, the primary application continues to be driven by water-saving. The use of thickeners enables water to be kept in-circuit via the thickener overflow ...
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Abstract. Interest in the use of high density, thickened tailings has increased significantly recently. Reasons vary, but include the need to conserve water, perceived lower risk of catastrophic failure, potentially easier closure or even reduced overall costs. As with any new technology, there has been a tendency to overstate …
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thickened tailings. 1. Introduction. Since only grams or kilograms of the valuables are extracted for each tonne of ore. processed, an immense amount of solids waste is discharged as solids slurry ...
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Paste and thickened tailings represent a highly concentrated slurry (70 wt%), which is often obtained from conventional 20–30 wt% tailings slurry dewatered (Lu et al., 2018). Dewatering plays an important role in the thickening performance of tailings slurry ( Buscall et al., 2015 ).
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Thickener operations work to recover clear water and to generate thickened tailings. In the thickener, the solids separate from the water by means of decantation, and they descend …
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The mechanism of tailings deposition is discussed, with a view to evaluating the applicability of some of the approaches that have been presented and some protocols are proposed for making the presentation of data more consistent and transparent. It is the contention of this paper that there remains considerable confusion regarding the …
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