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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 thickening the tailings stream would create a non …
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The Kidd Creek thickened disposal site currently stores >100 million tonnes of base metal sulphide tailings and by the time the site is expected to close in 2023 >130 million tonnes will be stored. The flotation tailings and jarosite waste are …
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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) solids concentration, depending on several parameters mainly the TSF deposition requirements and strategies, process plant water security status and the dewatering …
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The use of thickened tailings can result in a shorter delay between the end of operations and the start of cover placement, which means less time and cost expended in overall closure of the mine. In addition, the strategic placement of thickened tailings can increase the storage capacity in the TSF, which could potentially reduce further ...
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Notably, the benefits of dewatering options such as paste, thickened and filtered tailings. The relevance of these deposition techniques to reducing risk is also reflected by the ongoing support of this international conference series by the tailings and greater mining industries. Join us to hear about innovation, performance, economics, and ...
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A detailed chronology of the assessment of thickened tailings through a number of deposition trials is provided below: Pre June 2000Tailings was pumped to old tailings storage facility in purely conventional manner. Tailings deposited at a density of approximately 55%. Flotation density was around 50% hence tailings dewatering
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For surface thickened and paste storage the tailings are generally discharged from a central location either through risers or from point sources that are raised over the life of the facility. Dry stacking of tailings is normally carried out by a …
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paste and thickened tailings. This article will briefly review the primary factors behind increasing mine waste generation and highlight the role that paste and thickened
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Less water and steeper beach slopes in tailings impoundments are two major advantages behind the decision of applying paste and thickened tailings technologies. The potential need for embankments with less height supporting the tailings impoundment is an example for using thickening systems. The use of this technology in cold regions with its benefits and …
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For thickened tailings disposal, dry stacking and paste fill, the rheology must be well understood to ensure maximum efficiency of the entire disposal operation. The paper presents the disposal of bauxite residue (red mud) as a case study and outlines alternative and simplified methods of rheological characterisation. The effect of both shear ...
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Thickened tailings can be non-segregating, meaning the coarse fraction of the tailings stream will not separate at the beach head. This creates more consistent tailings characteristics over the length of the beach, rather …
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The thickened tailings were deposited subsequently in three thin layers in a flexible laminar shear box mounted on top of the shaking table. Cyclic loading with a peak horizontal acceleration of 0.13 g and a frequency of 1 Hz was applied to the layered tailings deposit. Different types of sensors were placed to monitor the accelerations ...
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In general, for thickened tailings, testing should be undertaken using sample sizes that will result in a layer thickness that reflects site practice (a range of 30 to 60 mm would be typical). Similarly, the initial slurry density should reflect the expected solids concentration of the thickener underflow.
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Thickened tailings are typically transported in laminar flow, but turbulent flow operation is possible for low yield stress mixtures, large diameter pipes and high operating velocities. Paste tailings are always transported in laminar flow. Iron ore tailings 64%m, 100 Pa yield stress.
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Historically, with conventional low thickened tailings deposition, beach slopes could be expected to be in a typical range of 0.2 – 1.5% which can be managed, to some extent, if variations occur during the operational stage. However, today, where water conservation is becoming more prominent, the need to reduce losses through seepage ...
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The depositing of thickened fluid fine tailings (FFT), which the industry has relied upon to develop geotechnically stable dry landscapes, has not materialised due to the low hydraulic conductivity of such placements. The addition of sand to thickened FFT is proposed to accelerate the consolidation of thickened FFT in a co-disposal scheme, and ...
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Managing paste thickener tailings provides benefits such as improved water recovery and dam safety, as well as more effective reclamation/re-vegetation. By taking into account the feed characteristics and standard bench-scale tests, …
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The overall objective of thickened and paste tailings disposal has been stated many times: it is to thicken a tailings slurry to the point where it is non-segregating, and will beach to form a …
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The design methodology for pipeline systems conveying thickened and paste tailings systems has been well developed over the last decade. This series of papers outlines the process for designing and implementing a typical surface tailings or underground backfill pipeline system. The papers comprise the following parts:
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thickened discharge for tailings management was initially motivated on the basis of potential water savings as well as the potential to reduce wall raising costs on the tailings dam.
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Thickened tailings are typically transported in laminar flow, but turbulent flow operation is possible for low yield stress mixtures, large diameter pipes and high operating velocities. Paste tailings …
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Thickened tailings, as the name suggests, involves the mechanical process of dewatering low solids concentrated slurry (Fourie 2003). This is … See more
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Efficient and effective management of conventional and thickened tailings disposal is critical. Considering the pressure from varying project constraints such as increasing environmental risks, water scarcity, permitting complexity, government regulations and community engagement challenges resulting from past failures.
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Paste and thickened tailings refer to the underflow of tailings thickeners that exhibit non-settling solids character at concentrations higher than produced by normal plant thickeners. Thickening …
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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 direct shear strength …
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Cemented paste backfill (CPB) is a key technology for green mining in metal mines, in which tailings thickening comprises the primary link of CPB technology. However, difficult flocculation and substandard concentrations of thickened tailings often occur. The rheological properties and concentration evolution in the thickened tailings remain unclear. Moreover, …
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Dry stack tailings management is becoming a more accepted practice due to the recurrent disasters seen with older, non-thickened and even more conventional thickened tailings storage facilities. The tragic loss of human life and significant environmental and physical damage to large tracks of land and communities are accelerating the ...
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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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"Paste and Thickened Tailings - A Guide (Second Edition)" comprises of twelve chapters, each written by internationally recognised experts, covering all aspects of paste and thickened …
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The concept of thickened tailings "stacking" as a means of surface disposal of mine tailings, first introduced by Eli Robinsky in the mid 1970s as an alternative to storing tailings in impoundments behind embankments, has come a long way. Australia has been the leader in research and development of the method, and a
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When water is expensive or scarce, water savings can more than pay for the cost of thickened tailings. Stacking. Surface stacking is the disposal of tailings as a paste on the surface of the ground. As paste is a non-settling, non-segregating suspension of solids, minimal water is released into the impoundment and the paste dries relatively ...
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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 ...
WhatsApp: +86 18221755073
thickened tailings include increased water recovery, reduction in the size of retaining embankments, improved facility safety, and reduced environmental impact. As a consequence …
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At a time where Filtered Tailings is trending in mine tailings management, we take a holistic view based on 40 years of experience in conservation and safety. Please read as we explore the benefits of Thickened Tailings including the CAPEX and OPEX advantages of using a Central Thickened Discharge system.
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When considering a thickened tailings solution, there is the question of whether the technology to thicken tailings should be located in the thickener as a piece of equipment, or whether a complete solution is required to achieve the best performance. We typically view the components required to thicken tailings in isolation rather than ...
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However, the dewatering of ultrafine tailings proves challenging with respect to the disposal and backfill of paste and thickened tailings (Sun et al., 2018, Chen et al., 2018). The key process in paste backfill technology is the dewatering of tailings (Wu et al., 2015, Edraki et al., 2019, Yi and Tan, 2018).
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