sand tailings disposal feb

sand tailings disposal feb

Feb 18 Tailings Directive 074 Explained - Oil Sands Magazine

Feb 19, 2016  Feb 18 Tailings Directive 074 Explained ... At least 50% of the fines in the oil sands deposit are to be captured in dedicated disposal areas (DDAs), ... Thickened tailings and coarse sand are mixed to obtain the correct sand-to-fines ratio. MFT can also be added if desired. A coagulant is added to prevent the mixture from separating.

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Technical Report: Design and Evaluation of Tailings Dams ...

projects. There are several methods used for tailings disposal. These include disposal of dry or thickened tailings in impoundments or free-standing piles, backfilling underground mine workings and open-pits, subaqueous disposal, and the most common method, the disposal of tailings

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Feb 25 Tailings Ponds 101 - Oil Sands Magazine

Feb 25, 2016  Feb 25 Tailings Ponds 101 ... Tailings ponds are lined with compacted sand and a layer of fine clay. The clay has a low permeability rate which helps prevent tailings water from seeping into the groundwater. Vertical pumping wells are installed around the perimeter of the tailings dyke (or dam). These wells serve to monitor the quality of the ...

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Guidelines for Performance Management of Oil Sands Fluid ...

An increasing number of oil sands mines will result in numerous tailings disposal impoundments that will be progressively reclaimed and closed in the 21st century. This reclamation requirement is hampered by a unique feature of oil sands tailings – the slow sedimentation and consolidation of fine tailings that are initially deposited in

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Mineral Waste (Tailings) Disposal - Best Practise from ...

Mineral Waste (Tailings) Disposal - Best Practise from Gravitational and Complex Ore Processing Operations 9th International Conference on Mineral Resources in the Republic of ... • Resulting tailings sand will be de-watered and tailings can be dry stacked similar to tailings

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ITEM: 23 SUBJECT: Uncontested Waste Discharge

The Unimin Corporation Ione Plant is an active silica sand and clay mine near Ione in Amador County. The Discharger proposes to dewater mine tailings prior to discharge and reuse the clarified water. This revision to tailings handling protocol will result in consolidated tailings with hydraulic conductivity roughly equivalent to a clay liner.

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PREFACE APPENDIX A.4A: Tailings Management Facility ...

The following three options have been considered for dam construction and/or tailings disposal and management: Use of local borrow materials to replace mine waste rock for construction of the tailings embankment, Cyclone sand construction of the tailings embankment, and Development of a dewatered tailings (dry stack) facility.

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Feb 18 Tailings Directive 074 Explained - Oil Sands Magazine

Feb 18, 2016  Feb 18 Tailings Directive 074 Explained ... At least 50% of the fines in the oil sands deposit are to be captured in dedicated disposal areas (DDAs), ... Thickened tailings and coarse sand are mixed to obtain the correct sand-to-fines ratio. MFT can also be added if desired. A coagulant is added to prevent the mixture from separating.

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Long-Term Federal Management of Uranium Mill Tailings ...

Feb 22, 2021  tailings relative to the amount of uranium concentrate produced. NRC estimated that 2.4 pounds of yellowcake uranium oxide is produced from 2,000 pounds of uranium ore.3 Public health and environmental concerns from uranium milling have been associated with various aspects of historical operations and tailings disposal.

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Mineral Waste (Tailings) Disposal - Best Practise from ...

Mineral Waste (Tailings) Disposal - Best Practise from Gravitational and Complex Ore Processing Operations 9th International Conference on Mineral Resources in the Republic of ... • Resulting tailings sand will be de-watered and tailings can be dry stacked similar to tailings

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Comparison of tar sands and phosphatic clay tailings ...

Dec 31, 1995  Comparison of tar sands and phosphatic clay tailings properties, disposal, and reclamation options

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Monitoring the Performance of an Alternative Landfill ...

WM2008 Conference, February 24-28, 2008 Phoenix, AZ INTRODUCTION The U.S. Department of Energy Office of Legacy Management (DOE) and the U.S. Environmental Protection Agency (EPA) collaborated on the design and construction of a disposal cell to contain uranium mill tailings at the DOE Monticello, Utah, Disposal Site

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DISPOSAL OF OIL SAND TAILINGS CENTRIFUGE CAKE -

A process for the disposal of oil sands tailings is provided, comprising: optionally diluting the tailings with sufficient water to yield a tailings feed having a solids content in the range of about 18 wt % to about 36 wt %; adding one or both of a coagulant and a flocculant to the tailings feed to form a centrifuge feed; centrifuging the centrifuge feed to produce a centrifuge cake having a ...

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Tailings Management Plan for Sierra Rutile Limited, Sierra ...

• The oversize material from both decks is combined and conveyed to tailings disposal: - The undersize material is pumped to the de-sliming and effluent disposal section, where it is fed to cluster cyclones. The overflow from the primary and secondary cyclones flow to the final effluent sump together with sand tailings from the spiral modules.

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Tailings - Paterson Cooke

Tailings Slurry pipelines are commonly used to transfer mine residue from the processing plant to the tailings storage facility. Historically these pipelines were designed to operate at low solids concentrations, however as dewatering technology improved and solids concentrations increased, residue disposal systems have become significantly more complex. Designing an effective residue

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Recycling Tailings Seepage Water for Diogo Heavy Minerals ...

The feed sand is pumped at 25% solids and the tailings are rejected at 65% solids. Water in the tailings infiltrates to the upper aquifer, evaporates, runs back to the dredge pond or seeps into the Niayes system. Prior to mining operations in 2014, the initial water level in the pond of about 6masl was raised by 1 to 2 m for optimal mining.

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What are tailings in mining? - Quora

Feb 05, 2021  Tailings are the waste products from mining. Depending on the type of mining, tailings can be liquid, solid or a slurry of fine particles. Tailings include: Finely ground rock particles – ranging from sand-sized to silt-sized. Chemicals used to ex...

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Mine Waste Tailings Beaching - 911 Metallurgist

Dec 23, 2017  Presently, particle separators, such as cyclones, are used to gather the sand fraction of tailings for use as hydraulically transported, underground backfill. This practice, however, leaves the fine fraction to be deposited on the surface. If the total tailings could be used as backfill, the need for a large surface disposal area would be ...

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Moab Site Marks Milestone of Moving 9 Million Tons of Mill ...

Feb 27, 2018  GRAND JUNCTION, Colo. – EM has reached a milestone of moving 9 million tons of uranium mill tailings from the Moab Site in Utah to the dedicated disposal cell near Crescent Junction, Utah. The Moab Uranium Mill Tailings Remedial Action (UMTRA) Project’s Feb. 20 achievement means 56 percent of the estimated 16 million tons of mill tailings have been shipped for disposal.

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ACTIVE TAILINGS AND PRODUCTION ROCK SITE 2019

tailings per day, or approximately 650,000 DST of tailings annually. These tailings are dewatered in a filter press at the mill, with about 50% of the tailings being mixed with cement and hauled back into the underground mine for disposal in mined-out areas as mine backfill. The remaining 50% of the tailings

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‘Dear Sir: Your House Is Built On Radioactive Uranium ...

Oct 31, 1971  THE tailings are one of several kinds of radioactive waste left over from our country's quest for more raw material for atomic bombs.The gray sand is what remains after the rock‐like ore is ...

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Geotechnical Characterization of Old Tailings for Use as ...

The sand stacking strategy has been assessed as a medium-term alternative for tailings disposal. Sand stacking basically consists of disposing the tailings using cells contained by nonstructural berms within the tailings storage facility, so the tailings can be disposed as a slope above the maximum elevation of the existing dams, thus creating ...

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6.1 Introduction 6.2 Tailings Management Objectives

6.3.2 Coarse Sand Tailings Disposal The coarse sand tailings produced from the hydrocyclone underflow, combined with FFT from ponds, will be pumped to the SBAs and beached above water. The coarse sand tailings will be used to construct perimeter containment for sand beaching using hydraulic cell construction techniques.

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Environmental issues on reclamation of oil sands fine ...

Dec 31, 1995  The U.S. Department of Energy's Office of Scientific and Technical Information

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WM2013 Conference, February 24 – 28, 2013, Phoenix ...

Tailings that were relocated from flood plains were compacted wet of optimum and heavily watered for dust control. These practices may have contributed to high percentages of saturation in the relocated tailings. Figure 1 shows a typical rock cover radon barrier at the UMTRA tailings disposal cell in Shiprock, New Mexico.

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A review of binders used in cemented paste tailings for ...

disposal of mine tailings with a range of industrial byproducts or wastes that can be otherwise chemically challenging for the eco-system if stockpiled (Landriault et al., 1997a; Benzaazoua et al., 2004a). A. Tariq, E.K. Yanful / Journal of Environmental Management 131 (2013) 138e149 139. 5. Binding agents for cemented paste tailings formulations

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US4437998A - Method for treating oil sands extraction ...

Tailings from an oil sands hot water process extraction plant are mixed with hydrolyzed starch flocculant and transferred to a settling pond. After a residence period on the order of one year, sludge from the lower region of the settling pond is withdrawn, mixed with a hydrolyzed starch dewatering agent and transferred to a collecting pond.

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Dewatering processing tailings with centrifuges

The Tiebaghi Nickel Mine in New Caledonia was able to recover 90% of its process water by using Flottweg centrifuges. Learn more about the results in the following article: Dewatering tailings with Flottweg decanter centrifuges. Top of page. To the contact form +1 859 448 2300.

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Planning, Design, and Analysis of Tailings Dams - UBC ...

The disposal of mine waste, chiefly tailings, has of late assumed an importance that transcends even the massive volumes of materials produced annually by mining operations. From an engineering standpoint, some tailings embankments class among the largest earth structures in the world. Aside from their significance in strictly engineering terms, tailings impoundments receive intense regulatory ...

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In the matter of the Fingerboards Mineral Sand Project EES ...

5.2.1. Fine tailings disposal to the TSF The proponent advised that the use of centrifuges would remove the need for fine tailings to be temporarily stored in an engineered tailing storage facility (TSF). Rather, it is understood that dewatered tailings material can be returned directly to the excavated mine void.

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Red mud - Wikipedia

Red mud, formally termed bauxite residue, is an industrial waste generated during the processing of bauxite into alumina using the Bayer process.It is composed of various oxide compounds, including the iron oxides which give its red colour. Over 95% of the alumina produced globally is through the Bayer process; for every tonne of alumina produced, approximately 1 to 1.5 tonnes of red mud are ...

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Flocculation of lime-treated oil sands tailings ...

Feb 01, 1996  Abstract. Whole oil sands tailings resulting from water-based bitumen extraction processes can be co-flocculated, after treatment with slaked lime, with low dosages of a high molecular weight anionic polyacrylamide. The resulting composite sand-clay particles settle and dewater rapidly to a stackable product that can be hand-squeezed to 40–83 ...

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Frontiers Scientific Considerations for the Assessment ...

Feb 05, 2018  Deep-sea tailings disposal (DSTD) and its shallow water counterpart, submarine tailings disposal (STD), are practiced in many areas of the world, whereby mining industries discharge processed mud- and rock-waste slurries (tailings) directly into the marine environment. Pipeline discharges and other land-based sources of marine pollution fall beyond the regulatory scope of the

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Oil Sands Tailings Ponds in Canada - Oil Sands

Feb 26, 2021  Oil sands tailings ponds are man-made dam and dyke facilities for storing tailings material. 7 In Alberta, each barrel of oil produced typically requires nine barrels of water. 8 About 80 per cent of this water is recycled back into the Athabasca River. 9 The remaining 20 per cent of water contains a mix of water, sand, silt, clay, unrecovered ...

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NUCLEAR REGULATORY COMMISSION - NRC

Sand T. 0.38 1.66 237 0.19 7.52 .018 SM,SC,CL 0.32 1.76 0 10.9 .006 CL Shale 0.38 1.65 0-16.4 .003 The slime tailings values, except for Ra-226, are based on tests of sand tailings because access to the wet slime areas was restricted at the time of sampling. While these values are unrealistic for slime tailings, NRC staff determined that

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