brines Archives - International Mining

UK-based Watercycle Technologies, a deep tech company focused on developing sustainable, high-yield, low-cost, mineral extraction and water treatment systems, has signed an agreement with Energia Minerals (Italia) (‘Energia’) Srl, a subsidiary of ASX-listed Altamin Limited, to produce lithium carbonate from Energia’s Galería EL geothermal brine projects in the Lazio Region of central Italy using Watercycle’s proprietary Direct Lithium Extraction and Crystallisation (DLEC) technology.

Watercycle’s patented filtration process is, according to the company, proven to be able to selectively extract lithium from sub-surface waters/brines and is currently already being piloted in tandem with Cornish Lithium in the southwest of England. Its DLEC process is capable of treating a wide range of water types and can deliver dramatic reductions in costs, carbon emissions and water consumption compared with current processes.

Under the terms of the agreement, Watercycle will test the brines extracted from a borehole in Italy and, once the composition is understood, dedicated membranes will be fabricated by the team based on the chemistry of the water. Watercycle will then process a quantity of the brine using its DLEC process. Analysis of the composition of the lithium-rich solution produced from the process, as well as the composition of the de-lithiated brine, will then be undertaken. Watercycle will then process the lithium-rich solution to produce lithium carbonate salts, which it says is a key differentiator in its process compared to standard direct lithium extraction practises. This lithium carbonate salt will then be characterised to gather structural and chemical information as well as the chemical purity and recovery rate of the lithium salt. If successful, the two parties will examine the potential for initiating large scale pilot testing in Italy.

Watercycle CEO, Dr Seb Leaper, said: “We are delighted to be working with Energia Minerals who have recognised the potential of our unique approach to lithium extraction from brines. This agreement is a further validation of our proprietary membranes and processes, which are gaining increasing traction both nationally and internationally. Each brine has different characteristics, and it is part of our development model to test multiple brines to further prove the efficacy of our technology and provide leading-edge, sustainable solutions for lithium and critical mineral extraction from them.”

Watercycle co-Founder and CTO, Dr Ahmed Abdelkarim, added: “Our technology has taken years of development both within the University of Manchester and now within Watercycle, the vehicle that is advancing its development and implementing the commercialisation strategy. We are not only successfully partnering with lithium brine developers but also making fantastic headway in the extraction of multiple critical minerals including cobalt and graphite from spent batteries and the utilisation of our processes in desalination, critical in today’s world where water shortages are being becoming more pronounced. I look forward to announcing further progress as we rapidly develop the business and deliver commercial but sustainable solutions to the mineral extraction market.”

There are plenty of mining applications one can see Boston, Massachusetts-based Gradiant’s end-to-end water technology solutions serving.

A spinout of the Massachusetts Institute of Technology, the company calls itself the “experts” of industrial water, water reuse, minimum liquid discharge (MLD) and zero liquid discharge (ZLD), and resource recovery of metals and minerals.

That is a big remit, hence the reason why it caters to at least nine industries on a global basis in mission-critical water operations, with over 70% of its clients being Fortune 100 companies in the world’s essential industries.

Mining companies have historically been wary of suppliers that serve a variety of industries, believing their needs rarely cross over with the requirements of other industries. Gradiant believes it is different in that its solutions incorporate not only the hardware and software to fine-tune water technologies, but also the artificial intelligence (AI) to ensure the tools being used are effective regardless of the inputs.

This includes the RO Infinity™ (ROI™) platform of membrane-based solutions for complex water and wastewater challenges, which combine Gradiant’s patented counterflow reverse osmosis (CFRO) technology with reverse osmosis and low-pressure membrane processes. ROI solutions enable customers around the world to achieve sustainability goals to reduce their water and carbon footprint, the company says.

This platform is complemented with AI-backed SmartOps™, an integrated digital platform for asset performance management to optimise and predict plant operations using historical and real-time process data, resulting in performance and cost efficiencies.

Prakash Govindan, Co-Founder and COO of the company, says most water solutions on the market are built for consistent liquid/solid feeds and work effectively when the input is in accordance with these specifications. When the feed changes, they often become ineffective, needing to be updated or changed out, which costs money and impacts the various processes on either side of the water treatment section.

“The machine-learning algorithms we use – neural networks and time-series algorithms – ensure we consistently optimise the operation of our solutions,” Govindan told IM. “These tools make sure we always use the right performance metrics and don’t lose efficiency in the face of variability.”

The algorithms cannot change the hardware built into the water treatment plant, but it can, for instance, change the speed of the pumps or blowers. “We call it balancing, which is all part of our IP portfolio,” Govindan said.

*SmartOps is an integrated digital platform for asset performance management to optimise and predict plant operations using historical and real-time process data*

For mining companies looking to employ water treatment tools at their operations, this results in Gradiant’s technology being able to concentrate metals to a higher degree than any other solution on the market, according to Govindan.

“We can concentrate an aqueous solution to the point where you can produce a solid material that miners can then process,” he said.

Considering desalination applications represent a significant portion of the company’s work to this point – through its CFRO process – the mining sector has already provided some wins.

The CFRO process enables remote inland desalination and water reuse that was not previously possible due to a lack of viable brine management solutions, according to Gradiant, concentrating brines to saturation for disposal or crystallisation while producing a purified product water stream for beneficial reuse.

One significant nickel miner in Australia with a brine stream is using this solution to recover large amounts of concentrate it can feed through to its captive processing plant to produce an end-use product.

“Gradiant’s technologies enable clients to recover more than 50% of the nickel and cobalt from leached brine – this stream would have otherwise been wasted without our solutions,” Gradiant said. “Overall, this was a client benefit of about 20% increase in nickel and cobalt production across the entire operation.”

When considered together with the energy savings (75%), freshwater savings (25%) and environmental benefits, Gradiant continues to see high interest from miners around the world to adopt its solutions, it says.

That is before even factoring in the other complementary benefits that come with using SmartOps.

“All our products benefit from in-built sensors that not only allow us to update the operating parameters based on the detected materials, but also carry out scheduled maintenance on the hardware using these algorithms,” Govindan said. “This allows us to carry out 30-40% less service intervals than many conventional suppliers as we only take the solution out of operation based on what the data is telling us.

“Not only this, but we also have complete oversight of these parameters from remote locations, meaning you can monitor the systems from remote operating centres and not remain on site after installation.”

With mines getting more remote and hiring local employees getting even harder with the well-documented skills shortages, Gradiant feels its solutions will continue to win miners over.

Watercycle to test DLEC technology on Energia Minerals’ geothermal brine samples

Gradiant concentrating its mining proposition