The dense phase hydraulic transport of high concentration cyclone classified tailings in pipelines (2024)

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Journal of the Southern African Institute of Mining and Metallurgy

Field and laboratory research into the undrained behaviour of tailings at the University of Pretoria

2022 •

Yashay Narainsamy

Several high-impact tailings dam failures around the world in recent years have placed a renewed focus on the stability of tailings dams and pointed to potential shortcomings in traditional drained design and safety evaluation procedures. A need to consider undrained shear strength in the design of tailings facilities has become apparent. However, there are specific requirements that need to be met before undrained shearing occurs. In South Africa, the last major failure was likely the Merriespruit disaster in 1994, which leads to the question of whether the conditions required for undrained shearing are readily applicable to South African tailings dams. This paper describes research at the University of Pretoria that has recently commenced to further investigate the conditions required for undrained failure to occur. The research includes laboratory and field testing to replicate these conditions in the laboratory and relate them to those found in an active tailings dam.

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Proceedings of the 15th International Seminar on Paste and Thickened Tailings

Application of hydrocyclone technology to tailings storage facilities to reduce water consumption

2012 •

John Wates

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Proceedings of the 18th International Seminar on Paste and Thickened Tailings

The impacts of using thickened tailings on water management and CAPEX of tailings storage facilities

Kristof Fabian

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Tailings transport on high yield stress requirements: turbulent or laminar flow?

2018 •

Carla Tapia

In the mining industry, especially in Chile, tailings impoundment projects are tending to update their thickening technology or improve beach slopes due to environmental concerns, water scarcity, capacity restriction or economic variables. Projects in Chile either being designed or in operation under the concept of high-density tailings do not exceed a yield stress (fully sheared) of approximately 40–50 Pa, and their tailings transport systems may operate in turbulent regimes. There are currently significant research and development projects to improve thickening technology, impoundment deposition strategies and beach slopes management. However, do we have sufficient information and criteria relating to the long distance and large pipeline diameter for the transportation of tailings between the thickening and deposition points for high yield stress requirements? What happens to the transportation of tailings if it must be designed under the concept of high density with a yield stres...

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International Journal of Coal Science & Technology

The beneficiation of tailing of coal preparation plant by heavy-medium cyclone

Yousef Ghorbani

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Mine Water and the Environment

Introduction to this Special Issue on Tailings Storage: Challenges and Technologies

Rafael Fernández Rubio

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Proceedings of the Ninth International Seminar on Paste and Thickened Tailings

Thickened and Paste Tailings Pipeline Systems: Design Procedure – Part 1

2006 •

Robert Cooke

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Development and Implementation of Thickened Tailings Discharge at Osborne Mine, Queensland, Australia

2004 •

Gordon McPhail

Osborne Mine is an underground copper-gold operation in Northern Queensland that mines an ironstone deposit which hosts magnetite and silica with chalcopyrite, pyrite, and pyrrhotite. The mine setting is arid with the majority of make-up water being supplied from boreholes located on the edge of the Great Artesian Basin, some 28 km away. The development and implementation of 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. As trials progressed however, it became apparent that thickened discharge would not only achieve these but also would enable reductions in operating costs, improved rehabilitation potential, and more efficient use of available storage capacity. This paper describes the development and implementation of thickened discharge at Osborne. The operating strategy and the operating cost savings that have been realised are discussed, as is t...

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Proceedings of the 22nd International Conference on Paste, Thickened and Filtered Tailings

Dareh Alou thickened tailings management scheme: design considerations

2019 •

Abdullahi Mukhtar

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Sedimentation and Consolidation of In-Line Thickened Fine Tailings

Rick Chalaturnyk

An alternative technology to improve oil sands tailings settling behavior, an in-line thickening process (ILTT), was investigated. To achieve these new tailings, flocculants and coagulant are mixed with cyclone overflow tailings in an in-line multi stage fashion. Conceptually by binding fine particles at low solids content into flocs, the hydraulic conductivity is increased, tortuousity is decreased and the mass of the falling flocs is increased. Field and laboratory studies were carried out and preliminary findings indicate that the field in-line thickening process produces tailings that undergo rapid hindered sedimentation from fines void ratios of 67 to 5 followed by consolidation and segregation phenomena at lower void ratios. Shearing during deposition is believed to cause the segregation. History matching of the field pilot pond was performed to determine the geotechnical consolidation properties of the field deposits and these properties were compared to untreated cyclone ove...

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The dense phase hydraulic transport of high concentration cyclone classified tailings in pipelines (2024)


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