Emerging Lithium Extraction Sector Takes Advantage of Peristaltic Pumps from WMFTG

Grinding Solutions, a leading metallurgical laboratory and consultancy service, is using a 500 series peristaltic pump from Watson-Marlow Fluid Technology Group (WMFTG) as part of a new pilot plant for Cornish Lithium. The pump features six pumpheads to dose reagents into all six streams of the flotation process simultaneously.
Emerging Lithium Extraction Sector Takes Advantage of Peristaltic Pumps from WMFTG

Emerging lithium extraction sector takes advantage of peristaltic pumps from WMFTG. (Image source: Watson-Marlow Fluid Technology Group)

As part of the same pilot plant, the company is also using a Qdos metering pump from WMFTG to dose flocculant into settling tanks. Grinding Solutions has taken advantage of pumps from WMFTG for many years as part of bench testing operations, but the move to pilot scale operations is a first-time venture for this progressive company.

With the push towards electrification and renewable energy sources, companies, countries and regions are exploring sources of lithium and other battery metals. Cornish Lithium, for example, is looking at the extraction of lithium from brines and hard rock. After successful bench testing, Grinding Solutions is now undertaking pilot plant testing for Cornish Lithium, helping the company to develop a process to extract lithium from micas.

Pilot scale operations enable Grinding Solution to confirm bench test results, build confidence and generate concentrate which Cornish Lithium can use for further testing. The pilot plant will also help its client to verify processes, understand costs and minimise risks.

Enormous industry change
Battery metals will be critical in the future as the world moves towards more environmentally friendly transportation and infrastructure. Cornish Lithium is an eco-technology mineral exploration company focussed on the sustainable extraction of lithium and other battery metals in the historically significant mining district of Cornwall. It is one of only five regions worldwide for lithium-enriched granites. The company has secured extensive mineral rights agreements across more than 500 square kilometres of Cornwall, as it looks to establish a strong, sustainable and environmentally responsible lithium extraction industry in the UK.

Partnerships are key to this ambition, which is why the company works closely with Grinding Solutions, based near Truro, Cornwall. In turn, Grinding Solutions partners with leading pump specialist WMFTG, which also has its global headquarters in Cornwall.

“We’ve been working with Cornish Lithium for a couple of years now,” says Jon Rumbles, Project Metallurgist at Grinding Solutions. “Steadily, we’ve progressed from bench-based mineral processing and testing, to pilot plant. Rather than processing tens of kilograms we’re now processing hundreds of kilograms.”

Pumps prove critical
Grinding Solutions crushes, mills and separates the mineral into different size fractions, processing it to generate a lithium concentrate. Vital to the success of the pilot plant is the accurate dosing/pumping of materials.

Through the pilot plant’s flotation stage, which promotes mineral separation, there is a need to dose reagent (collector and thickener) at a constant addition rate. Here, the company takes advantage of a Watson-Marlow 530SN peristaltic pump with six 313 pumpheads.

“The use of six pumpheads means we can use a single pump to dose all six streams through the rougher and scavenger as part of the flotation process, which is very efficient,” says Mr Rumbles.

In addition, the company is leveraging the benefits of a Qdos 30 metering pump from WMFTG for dosing flocculant into settling tanks at a rate of 10-15 ml/min. The flocculant allows for better settling, permitting quicker extraction of the water ready for recirculation back through the system.

Many advantages
“We’ve been using Watson-Marlow pumps for years, for both dosing and slurry transfer,” explains Mr Rumbles. “They are really easy to calibrate, while their wide ranging flow rate capabilities are invaluable. We have a number of 500 series pumps on site for reagent dosing, plus the Qdos 30. A couple of the 500 series pumps are fitted with larger pumpheads for slurry transfer, while some of our 600 pump series models are linked to density meters. In fact, to facilitate automatic adjustment, we’re now looking at using the 4-20 mA input for even more control from live meters.”

As well as dosing viscous reagents, Grinding Solutions uses its Watson-Marlow pumps to dose sulphuric acid, which helps the system maintain a pH of 2-3.

“By using peristaltic pumps from Watson-Marlow, we’ve not had to think about issues like strong acidity and high viscosity,” concludes Mr Rumbles. “As the pumpheads are self-contained, we can change a reagent – and a pumphead – without having to worry about damage to pump parts or cross contamination. In addition, we get accurate dosing and continuous flow from Watson-Marlow pumps, with no reliability issues whatsoever.”

More articles on this topic

Watson-Marlow Fluid Technology Solutions: Name Change Reflects Complete Fluid Management Solution Offering

12.04.2022 -

Watson-Marlow Fluid Technology Group – part of Spirax-Sarco Engineering plc, a FTSE 100 company – announces it has changed its name to Watson-Marlow Fluid Technology Solutions (WMFTS). As the company evolves to meet the needs of the sectors in which it operates, following a successful period of global growth, the name change aligns with a strategic commitment to providing end-to-end fluid management solutions for customers.

Read more

Correct Pump Selection Vital for Seed Treatment Applications 

29.11.2021 -

Seed treatment is a long-established and proven way for farmers to battle crop diseases and destructive insects, while simultaneously encouraging germination and promoting early season growth. The pumps within seed coating machines have a range of challenges to overcome and demands to meet, so careful assessment at selection stage is vital.

Read more

Watson-Marlow Announces Ground Breaking of New State-of-the-Art Manufacturing Facility

25.11.2021 -

Watson-Marlow is pleased to announce the ground breaking of its new state-of-the-art manufacturing facility in Devens Massachusetts. A celebration ceremony was held on Thursday, November 18th at 16 Bulge Road in Devens MA. The new facility will be dedicated to Watson-Marlow’s range of industry leading products, including peristaltic pumps, tubing, fluid path solutions and BioPure components.

Read more