The University of Newcastle, Australia

P14 – Application of Inclined Channels in Enhancing Early Gangue Rejection through Gravity and Flotation Separation

Closing Date: 31 December 2020Apply Now


PhD Scholarship

Supervisor Laureate Professor Kevin Galvin - The ARC Centre of Excellence for Enabling Eco-Efficient Beneficiation of Minerals is seeking creative and innovative PhD applicants to join our national collaborative Centre, to develop transformational technologies to reduce energy and water consumption and increase metals recovery. This project will investigate new ways to remove coarse particle gangue from grinding circuits to reduce energy and water consumption.

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Our inclusive and equitable culture is supported by specific equity and diversity initiatives, which will support all members of the Centre to achieve their career goals.

The aim is to investigate the transport of mineral particles through inclined channels, and to assess the effect of improving the particle buoyancy through the introduction of air bubbles.

This project extends the application of the Reflux Classifier to cover an increasingly important goal in minerals processing, early gangue rejection. The removal of the coarse gangue particles reduces the level of comminution required, and greatly improves water recovery. Here the objective is to convey the coarse gangue and relatively fine, floatable particles, and the ultrafine particles to the overflow. Importantly the relatively high-density particles would be sent for further comminution and liberation, and in turn flotation. All the overflow would be sent to conventional flotation, noting that the coarse portion should be gangue minerals.

Conversely, the RC Air involves the introduction of air bubbles with the feed particles. Surface liberation leads to bubble particle adhesion, resulting in the valuable particles having a relatively low effective density. Those particles and all the ultrafine particles would report to the overflow. Then the fine portion would be sent on to flotation, and coarse portion to comminution and then flotation. The underflow would be deemed a waste stream.

This project involves collaboration between researchers from the University of Newcastle, Curtin University, University of Queensland, and Imperial College. Experiments will be conducted using both the RC and the RC Air to examine the effectiveness of the particle transport through the inclined channels. This work would most likely be conducted on a continuous steady state basis.

The RC and RC Air have a fluidised bed located below the inclined channels. This could in principle be operated in a semi-batch fashion, with the overflow returning to a small reservoir, for return to the system via a pump. In this case the fluidisation would be achieved by the recycled overflow rather than by adding water. The goal here would be to track a single particle within a suspension, perhaps using positron tracking, ie PEPT. Air would be injected and would ideally disengage at the top without the formation of a froth.

For more information on our Centre please visit www.coeminerals.org.au

PhD Scholarship details

Funding: $33,092 per annum (2020 rate). For a PhD candidate, the living allowance scholarship is for 3.5 years and the tuition fee scholarship is for four years. Scholarships also include up to $1,500 relocation allowance and Overseas Student Health Cover at single rate, for an international candidate.

Supervisor: Laureate Professor Kevin Galvin

Available to: Domestic and International students

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Eligibility Criteria

The applicant will need to meet the minimum eligibility criteria for admission.

Application Procedure

Interested applicants should send an email expressing their interest along with scanned copies of their academic transcripts, CV, a brief statement of their research interests and a proposal that specifically links them to the research project.

Please send the email expressing interest to Kevin.Galvin@newcastle.edu.au by 5pm on 31 December 2020.

Applications Close 31 December 2020 Apply Now


Contact Laureate Professor Kevin Galvin
Phone +61 2 4033 9077
Email Kevin.Galvin@newcastle.edu.au

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