Jan 01, 2018· Thickened tailings slurries in pipeline transportation form flocculent structures that are unstable and can not only be stretched or damaged by the continuous shearing force from the pipe wall but also lapped or recombined by bridging [15]. ... Paste and Thickened Tailings, A Guide, Australian Centre for Geomechanics, Perth, WA, Australia, 3rd ...

obtain thickened tailings, paste, or filter cake. The paste can be mixed with different binder types (cemented paste backfill) and used to fill mine stopes. The TT and CPB are usually delivered by pumping or gravity, which requires a pipeline reticulation system. Because densified tailings behave as non-Newtonian fluids, the design

Thickening and pumping paste tailings This method involves densifying tailings in a paste thickener and then hauling it with positive displacement pumps to the tailings storage facility. The tailings can be deposited from a single discharge point or from multiple spigots in order to raise the deposition slope.

13th International Seminar on Paste and Thickened Tailings, Toronto, Canada May 2010 Other authors Effects of Specimen Geometry on Fatigue-Crack Growth rates in Pipeline steels

The successful design of a thickened or paste tailings system requires that the system is designed to accommodate the effect of the high density slurry on pumps, pipelines and the overall system operation. The transport system must be designed as an integrated unit and the interaction ... plant, the pump station and the pipeline.

Jun 29, 2020· The tailings slurry that remains after extracting valuable ores is mainly a mixture of crushed rock and mill processing fluid . Water content is key to the rheological behavior of tailings slurry in a pipeline. Depending on their water content, slurries can be classified as conventional, thickened, paste, or cake.

Apr 25, 2018· Specialties: Slurry pipeline anaylsis and design, paste and thickened tailings, backfill systems, hydraulic hoisting, marine mining Articles by Robert Developments in …

Jun 05, 2018· Several large tonnage operations are being developed based on paste and filtered tailings systems. The successful implementation of filtered, paste and thickened tailings technology is dependent on a sound understanding of slurry colloidal behavior, thickening and thickener operation, filtration, rheology, pump and pipeline transport systems ...

Backfill rheology is the primary tool in controlling costs, pipeline flow and wear, and obtaining strength. A mixture above a 10-in. slump (the limits for measuring slump) increasingly becomes a more fluid, non-segregating slurry. ... With thickened paste and filtered tailings, a finer grind can affect the payback of tailings disposal by ...

orebody, but was typically classified. Paste backfill (total tailings) formed better fill and allowed more ore to be extracted. Paste made with filter cake Rheology and pipeline transport critical Secondary benefit – less material placed in the tailings dam

ACG Paste | ACG Paste, Thickened and Filtered Tailings Conference. This conference is the twenty-fourth in the series of international conferences on paste, thickened and filtered tailings (P&TT) initiated by the ACG in 1999, and reflects the developing maturity of P&TT management. Paste 2021 seeks to explore the considerations needed to raise ...

The paste backfill produced by the plant has a pulp density of 85% (wt) and a slump of 9.5 to 10.5 inches. The cement addition rate is 6-8%. Paste backfill is prepared by de-watering flotation tailings from a lead-zinc concentrator. The tailings are partially classified using a hydrocyclone to increase thickening and filtration rates.

xiv 7 Thickening 113 7.1 .....PREAMBLE 113

The reasons for considering paste and thickened tailings, as opposed to conventional tailings, originate from many economical, engineering, environmental, and social benefits. In a recent ... with a high-pipeline pressure rating is required, as for the paste tailings disposal case.

• Recovery, Reprocessing, and Relocation of Existing Tailings • Surface Disposal of Conventional, Thickened and Paste Tailings • Sub-sea Tailings Placement (STP) Systems • Open Channel Flow (Launder System) • Packed Flow Pipeline Systems • Tailings Deposition • Conventional Tailings Disposal • Water Reclaim Systems Tailings ...

Date/Time Date(s) - 21 Sep 2021 - 23 Sep 2021. Location The Esplanade Hotel. Event website This conference is the twenty-fourth in the series of international conferences on paste, thickened and filtered tailings (P&TT) initiated by the ACG in 1999, and reflects the developing maturity of P&TT management.

Taking the superfine tailings slurry (STS), fine tailings slurry (FTS), and unclassified tailings slurry (UTS) of a gold mine as examples, a series of laboratory shear tests were conducted to investigate the effect of anionic polyacrylamide (APAM) on the structural stability of the thickened tailings slurry in pipeline transportation. Experimental results showed that the FTS and UTS …

Angus has been directly involved in analysis and design of slurry transport systems since 1987 and has worked on long distance slurry pipelines, underground paste and backfill distribution systems and numerous conventional, thickened and paste tailings disposal systems. Graeme Johnson. Pr Eng, BSc Eng (Mech)

Tailings Paste Thickening Tailings Paste Thickening. The advantages of paste thickeners in tailings circuits have been well-established for most minerals. The type of paste thickener underflow generally used for surface stacking of tailings is called "thickened tailings." ... The resulting slurry is pumped through a pipeline and chemicals ...

Paterson & Cooke has designed and implemented numerous tailings systems throughout the world. Our capability includes filtration, thickening, cycloning, pump and pipeline transport, choke stations, gravity launder transport, deposition arrangements (including jacking header systems) and water recovery from the tailings facility.

Jun 04, 2019· Several large tonnage operations are being developed based on paste and filtered tailings systems. The successful implementation of filtered, paste and thickened tailings technology is dependent on a sound understanding of slurry colloidal behavior, thickening and thickener operation, filtration, rheology, pump and pipeline transport systems ...

High concentration paste backfill and thickened tailings pipeline tests are done at our laboratories in Cape Town, Denver, Santiago and Sudbury. Our facilities can be modified to suit client specific test requirements and to test vendor equipment and instrumentation to determine their suitability in specific applications.

An elevated location of a paste thickener on a ridge close to the disposal area is considered at a Swedish iron ore mine. About 0.7 Mtonnes of thickened tailings are planned to be layered as paste in the vicinity of the thickener over several years with pipeline lengths of up to 900 m after about 20 years. In order to clarify the pipeline pumping

TheTailings Continuum:DefiningTheBoundaries 11 2.1 PREAMBLE 11 2.2 THETAILINGSCONTINUUM 11 2.3 THECURRENTSITUATION 12 2.3.1 Conventional tailings slurry 13 2.3.2 Thickened tailings slurry 13 2.3.3 Paste 14 2.3.4 Cake 15 2.4 CLASSIFICATIONSYSTEM-BOUNDARIES 15 2.4.1 Segregation threshold 16 2.4.2 Initial …

" Pipeline performance. " 2003 Intl Seminar on Paste and Thickened Tailings, 14-16 May 2003, Melbourne, Victoria, Australia, Section 8, 1-13. The thickening process (compression) Apr 2003

Challenging economic conditions and increasingly strict environmental regulations demand tailings pipeline systems that travel longer distances, at higher concentrations and with longer design lives. Our solutions include gravity flow, open channel flow, energy dissipation, multiple pumps in series, and thickened paste disposal.

Sep 19, 2016· paste tailings in a surface impoundment (Cemented Tailings Facility - CTF) at the mine site. ... pipeline alternatives and alternative pipeline routes were studied by MG Engineering Inc. (2016). Geomin Resources, Inc. 2 July 18, 2016 ... Dry stack tailings disposal would involve thickening the tailings followed by filtering to reduce

A thickened tailings or paste disposal area is designed to store solids and a little excess water. Recovery of process water is carried out in the thickener before deposition. Due to the higher beach slope, the footprint of the area needed is half the size of a conventional tailings pond. High viscosity in tailings and less water in the pond ...

Now the metallurgical plant tailings are dewatered and used as thickened tailings or paste backfills. The major changes in these operations, besides the backfill tailings becoming more fine and the need for more capital intensive equipment, is the need to introduce cementitious binders to take up the water remaining in the backfill and generate ...

° Mineral Slurry Long Distance Pipeline Concentrates (30% – 75% solids) ° Paste / Thickened Tailings (PTT) & Backfill Applications (30% – 75% solids) ° Acti-Gel works in Salt and Brackish Water. Concrete Products • Mineral VMA for use in Pumpable & Sprayable Concrete products such as: ° SCC Mixes ° Mine Seals ° Geo-Polymer Concrete

Thickened tailings are defined as tailings that have been significantly dewatered to a point where they will form a homogeneous non-segregated mass when deposited from the end of a pipe When placed layer by layer the thickened tailings will dry to near its shrinkage limit and become dilative under dynamic shaking, thus preventing

Filtered, Paste and Thickened Tailings The design of deep level backfill distribution systems for hydraulic and paste backfill was revolutionized by Paterson & Cooke's full flow design methodology. Our expertise covers recipe formation, backfill production plants, pump and pipeline delivery systems through to stope placement.