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BHP and Rio Tinto to collaborate on new tailings technology

By: Rio Tinto via Business Wire

October 30, 2022 at 22:20 PM EDT

ⓘ This article is third-party content and does not represent the views of this site. We make no guarantees regarding its accuracy or completeness.

Global miners BHP and Rio Tinto have formed a partnership agreement to accelerate the development of technology that could significantly increase water recovery from mine tailings, and in turn reduce potential safety risks and environmental footprints associated with tailings storage facilities.

The first project will involve testing the application of an innovative large-volume filter unit at a BHP copper mine in Chile, which would remove up to 80% of the water in the tailings stream before it is deposited in a storage facility.

Rio Tinto will bring its experience from implementing smaller-scale tailings filters for bauxite residues at alumina refineries since 2005. Both organisations will work in collaboration with leading technology and equipment providers, technical experts, research groups and the academic sector.

Manufacture of the filter unit is already underway. The pilot construction is due to begin in early 2023 and operations are scheduled to commence in early 2024. The pilot will test the potential of a large-scale tailings filter unit for scalability and cost-effectiveness across global mining operations.

Removing more water from tailings would reduce potential risks associated with moisture in storage facilities, reduce the footprint required by such facilities, and create opportunities to productively re-use tailings, for example, as raw material for glass, construction or agriculture industries.

The additional water recovered from tailings by filtration could be re-used in processing facilities, reducing overall water consumption.

BHP Chief Technical Officer, Laura Tyler, said: “The world will need more critical minerals in the decades to come to support economic development and decarbonisation pathways. It is important that we keep working together across the global mining sector to raise standards and make sure our operations are as safe and sustainable as they can be. Responsible management of tailings and improved water use is a big part of that.”

Rio Tinto Chief Technical Officer, Mark Davies, said: “It is in everyone’s interest that we, as an industry, find safer and more sustainable ways to manage tailings. As two of the leading companies in the sector, we want to bring our combined knowledge and expertise to address this challenge.”

Tailings usually takes the form of a liquid slurry made of fine metal or mineral particles and water – created when mined ore is crushed and finely ground in a milling process to enable the metals and minerals of interest to be extracted.

View source version on businesswire.com: https://www.businesswire.com/news/home/20221030005001/en/

Contacts

BHP

Australia and Asia

Jeremy Milne

M +61 438 803 549

Satish Rajmohan

M +65 9825 6307

UK

Neil Burrows

+44 7786 661 683

Americas

Renata Fernandez

M +56 9 8229 5357

Megan Hjulfors

M +1 403 605 2314

media.relations@bhp.com

Rio Tinto

Media Relations, Australia

Matt Chambers

M +61 433 525 739

Jesse Riseborough

M +61 436 653 412

Media Relations, UK

David Outhwaite

M +44 7787 597 493

Media Relations, Americas

Simon Letendre

M +514 796 4973

Malika Cherry

M +1 418 592 7293

Please direct all enquiries to media.enquiries@riotinto.com

Rio Tinto plc

6 St James’s Square

London SW1Y 4AD

United Kingdom

T +44 20 7781 2000

Registered in England

No. 719885

Rio Tinto Limited

Level 43, 120 Collins Street

Melbourne 3000

Australia

T +61 3 9283 3333

Registered in Australia

ABN 96 004 458 404

riotinto.com

Category: General

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