Thursday, 2 October 2025

AECI Mining Chemicals Strengthens Partnership with MEI Conferences

AECI Mining Chemicals, a division of AECI Ltd, is part of a diversified group of 16 companies and employs 400 people. In addition to South Africa, they are involved in Botswana, Namibia, Zambia, Zimbabwe and the DRC. The next target markets are in Ghana, Morocco and Tanzania as well as Australasia and South America. 

AECI Mining Chemicals adds value in the beneficiation of primarily PGMs, diamonds, coal, gold, uranium and base metal ores. Most of their products are used in the froth flotation and tailings treatment sectors of the mining industry. The portfolio includes specialty thiol-based collectors, mineral froth formation chemicals, unwanted gangue mineral depressants, polyacrylamide thickening polymers and tailings polymeric rheology modifiers. 

AECI Mining Chemicals has the largest mining chemicals manufacturing facility on a single site in the southern hemisphere and a state-of-the-art R&D centre where world-class specialists deliver innovative solutions not only for today’s mineral extraction challenges but also for mining of the future. 

The company has become a valued regular sponsor of MEI’s Flotation conferences, first joining us at the online Flotation ’21 event during the pandemic. This followed a long-standing relationship with Senmin, which now forms part of AECI’s Mining Solutions pillar.

With the return to in-person events at Flotation ’23, Shani Engelbrecht, Global Portfolio Manager, shared: "A big shout-out to MEI Conferences for creating such a stimulating environment! Flotation ’23 has been a truly enriching experience - I left with my mind challenged and heart full."

MEI's Jon Wills with the AECI team at Flotation '23

The impact was immediate: AECI Mining Chemicals signed on as a sponsor for Flotation ’25, Process Mineralogy ’24, and Critical Minerals ’24. We are now delighted to welcome them back once again as sponsors of Process Mineralogy ’26 and Critical Minerals ’26 in Cape Town.

#ProcessMineralogy26
#CriticalMinerals26

Monday, 29 September 2025

September summary: the Moselle and the Thames, and sad news from Australia

Barbara and I were back in Luxembourg early this month, our second visit this year to see Jon and family. Not unusually, our rail journey to Heathrow was disrupted (and the return journey was even worse), so it is always a real pleasure to travel in Luxembourg, where public transport is free for both locals and tourists and the trains run on time and are spotlessly clean.

Luxembourg is known as the "Land of Castles." Situated at the crossroads of Europe, between France, Germany and Belgium, it was, in the Middle Ages, a contested territory and a vital passageway for trade and armies. Building castles was essential for defence and control. The land was divided into many small lordships, and each noble family sought to protect its territory and assert its power by constructing fortified residences.

A good example of a feudal castle is that at Esch-sur-Sûre, first built in 927, making it one of the oldest in Luxembourg. The castle stands on a rocky promontory overlooking the village, above the River Sûre. The river itself flows from southeastern Belgium, through northern Luxembourg, and eventually joins the Moselle.

The castle at Esch-sur-Sûre, overlooking the village

During our brief stay, we also visited the Roman amphitheatre at Trier, Germany’s oldest city, just across the Luxembourg border on the Moselle. Trier was established as a Roman metropolis after their arrival in 17 BC. On our first visit (posting of March 1st, 2023), we explored the Porta Nigra, a 2nd-century city gate and the largest Roman gate north of the Alps.

The amphitheatre, built around 100 CE, could hold about 18,000 spectators for gladiatorial games, animal hunts, and public spectacles. It was interesting to explore the underground chambers and passages beneath the arena, where animals and gladiators once waited before their appearance.

Ten days ago, Amanda was in London for the Great River Race, a spectacular boat race covering 21.6 miles from Millwall in the East to Richmond in the West, passing under London’s famous bridges over the Thames. The event began in 1988 with 61 boats and now attracts around 300 crews. It has become an international competition, drawing participants from the United States, Australia, and many European countries. 

It was a very gruelling three hours, said Amanda, who competed with the "Helford Sea Sisters" in their beautiful traditional Cornish gig, Helford. As an all-women crew, they were eager to support a charity close to their hearts: First Light, a local organisation aiding victims of domestic abuse.

The Cornish flag attracted many cries of "Oggy Oggy Oggy" from spectators

A very choppy Thames, with Helford left foreground

Three years ago I was in Melbourne to give a guest lecture at the IMPC Asia-Pacific 2022 conference. After the lecture I relaxed in the bar with a few mineral processors from the audience. One of them was Ron Goodman, and I was sorry to hear that Ron died earlier this month. Ron was a renowned tin expert and helped commission the Wheal Jane tin concentrator in Cornwall in 1971.  Originally from Dudley in the UK, he spent most of his working life in Australia and at the time of his death was an independent mining and metallurgical consultant. Many regarded him as one of the great practical mineral processors. Our condolences to his daughters Hana and Gemma.

Melbourne 2022, with Ron Goodman (right), Graeme Jameson,
Lachlan Bartsch and Martin Rudolph


Finally, the big news this month has been the State Visit of the US President to the UK. Everyone has their own views on this! And, talking of USA, many congratulations to the European Ryder Cup golf team for their narrow away victory over America.  Despite the egregious abuse hurled at them by the partisan local crowd the Europeans led by a record 7 points after the first two days, and the final day should have been a formality. But the Americans fought back, the visitors just hanging on for a 15-13 victory.  
Huge congratulations also to the England Women's Rugby Team for their decisive victory over Canada in the final of the Women's Rugby World Cup. Two great sporting achievements to lighten the gloom of a month in which the wars in Gaza and Ukraine have escalated and Putin has tested the nerves of NATO countries.

Thursday, 25 September 2025

Final calls for abstracts for Physical Separation '26 and Mineral Processing Circuits '26

If you would like to present papers at Physical Separation '26 and /or Mineral Processing Circuits '26 in Cape Town next April, then the deadline for submission of abstracts is the end of next month.

The 3-day Physical Separation '26 is the 9th in the series and is sponsored by Steinert, TOMRA and Mineral Technologies, with Media Partners International Mining and Minerals Engineering.

Abstracts should be submitted via the portal on the conference website.

The conference dinner will be held in the Kirstenbosch Botanical Gardens, very close to the conference venue. Acclaimed as one of the great botanical gardens of the world, few gardens can match the sheer grandeur of the setting of Kirstenbosch, against the eastern slopes of Cape Town’s Table Mountain. This breath-taking backdrop of nature boasts a MOYO restaurant with beautiful vistas, entertainment and cuisine composed of the best modern African produce.

Mineral Processing Circuits '26 is a 2-day event which immediately follows Physical Separation '26 at the Vineyard hotel. We are pleased that Prof. Kevin Galvin, of the University of Newcastle, Australia, will be presenting a keynote lecture "A new paradigm for mineral processing circuits - what might underpin the philosophy?"

There will be a conference dinner on the first night and the venue will shortly be added to the website. Abstracts should be submitted via the website portal.

Presenters at each conference will be invited to submit papers for peer-review in Minerals Engineering after the conference. Papers accepted for publication after refereeing will be published in the first available regular issue of Minerals Engineering, and included in the Virtual Special Issue of the conference on ScienceDirect. This is an ideal opportunity to present your work to an international audience and have your paper published in a refereed journal of high repute.

#PhysicalSeparation26
#MineralProcessingCircuits26

Monday, 22 September 2025

The rapid onset of AI makes copper ever more critical

Copper is arguably the world's most critical metal (posting of 27 May 2024; Is copper THE most critical metal? It always has been). Copper remains a cornerstone of global industrial development, critical for electrical wiring, electronics, infrastructure, and the green revolution's renewable energy systems and yet, despite its essential role, it has only recently been added to the USA's list of critical metals and minerals.

Global mined copper production currently stands at around 23 million tonnes per year, but every credible forecast warns that far more will be needed. The transition to renewable energy and the rapid adoption of electric vehicles are already stretching supply. Now, the accelerating "fifth industrial revolution", artificial intelligence, is adding an entirely new layer of demand.

Artificial Intelligence (AI) has been with us for a number of years now, but its use is increasing exponentially. When we converse with ChatGPT or Amazon's Alexa it is easy to imagine that we are conversing with a human and there have been recent reports of people forming deep emotional bonds with AI companions. But in reality we are conversing with something like this:

AI Data Centre
(Photo AdobeStock)
AI data centres are noted for being huge consumers of energy and water, but copper can account for nearly 6% of the capital expenditure of a data centre project. Its role is critical in electrical conductivity as it maximises efficiency in transmitting and distributing electricity and in thermal conductivity due to its support for high-performance heat exchangers, which are vital for cooling servers. Microsoft’s $500 million data centre in Chicago alone required 2,177 tonnes of copper during construction.

Analysts have predicted that copper demand from the sector will average around 400,000 tonnes annually over the next decade, peaking at 572,000 tonnes in 2028. The cumulative total in use by data centres could top 4.3 million tonnes by 2035. That comes on top of surging demand from other sectors, such as power transmission and wind energy, where copper usage is expected to almost double by 2035.

Existing copper mines are aging, facing declining ore grades and requiring costly reinvestment to maintain output. Over one-third to half of global supply may face these constraints over the next decade. Even with optimistic assumptions, there's a clear supply gap by 2035. Recycling, while helpful, won't fully bridge the gap. Increasing copper recycling is only part of the solution: recycled copper supply is projected to rise from about 33% today to 40% by 2035, and possibly 50% by 2050. But this still leaves a significant need for new mining.

In 2025 and beyond, copper ore processing innovation is indispensable, both to supply increasing demand and to ensure that production remains environmentally responsible. Around 80% of copper ore mined today is sulfide ore, almost all of these  ores being processed by flotation to make concentrates. The other 20% of copper ore is oxide ore, processed mainly by leaching/SX-EW.

Flotation is absolutely central to copper production, so even modest improvements here can have a huge impact on supply. Global average flotation recovery for copper sulfides is 80-90%. A 1% increase in recovery across the industry could add hundreds of thousands of tonnes of copper annually, equivalent to a new mid-sized mine. 

MEI’s Flotation ’25 is now just two months away, arriving at a pivotal time not only for copper but for the full spectrum of critical metals and minerals driving our resource-hungry world.

This year’s conference will spotlight the latest advances in reagent chemistry, bubble-particle interactions, hydrodynamics, circuit optimisation, and environmental performance, topics that are tightly aligned with today’s industry priorities. With more than 200 presentations from leading academics, industry pioneers, and cutting-edge technologists, Flotation ’25 is set to be a landmark gathering for the mineral processing community.

Delegates can expect bold new perspectives on sustainable flotation: bio-based reagents, greener chemistries, nanoparticle innovations, real-time monitoring tools, and machine-learning-driven control systems. Together, these advances are redefining what it means to maximise recovery while minimising environmental impact.


#Flotation '25 


Friday, 19 September 2025

A great turnout for the September Cornish Mining Sundowner

There was an attendance of over 30 for last night's mining sundowner at Falmouth's Chain Locker and it was good to see about a dozen students from Camborne School of Mines, some back from summer vacation and others just commencing their courses.

CSM students

I was pleased to welcome Ben Wraith, a Senior Process Engineer at Gekko Systems, Australia. Ben and his family are over from Australia primarily for a holiday and a wedding. As a mining family, and Ben having worked as a metallurgist in tin back in Australia, they decided to travel west to Cornwall to see the sights and learn more about the rich Cornish mining history, topping it off with the sundowner to chat about the past and hopefully the future mining activities in Cornwall.

It was also good to meet Ola Zawalna, the Strategic and Business Development Geo-Resources Manager for the Cornwall Mining & Geo-Resources Alliance, where she leads the Alliance’s growth strategy, develops partnerships, secures funding, and enhances Cornwall’s profile as a hub for mining, critical resources, and geothermal innovation.

With Ben and Ola

It was an excellent sundowner and I hope we get a similar turnout at the next one, on Thursday October 16th, from 5.30pm at the Chain Locker.

Monday, 15 September 2025

Advancing Process Understanding through Particle-Based Separation Modelling

Mineral beneficiation involves particle-specific processes, where performance is strongly influenced by the microstructural characteristics of individual particles. Ores currently being mined often exhibit high complexity, with fine-scale mineral intergrowths and diverse gangue associations that hinder separation. Within the field of process mineralogy, automated mineralogy has advanced the characterisation of such features, providing detailed particle-level data. However, these data are frequently summarised into bulk distributions (e.g., mineral composition, particle size, or liberation degree of the ore mineral) resulting in the loss of critical particulate information. Since particles are unique in size, shape, and mineral association, reliance on aggregated properties may oversimplify the relation between processing behaviour and ore microstructures, leading to incomplete or biased process interpretations.

In a keynote lecture at next year's Process Mineralogy '26, Lucas Pereira, of the Helmholtz Institute Freiberg for Resource Technology, Germany.  will highlight the use of data science techniques to exploit full-resolution particle datasets from automated mineralogy, namely particle-based separation models. The usefulness of this technology, both for forecasting and for understanding separation processes, will be illustrated by a series of case studies dealing with complex ores.

Lucas Pereira is Group Leader at Helmholtz Institute Freiberg. He develops particle-based separation models that transform high-resolution mineralogical data into practical solutions for industry. His research interests lie at the intersection of digitalisation, data analytics, and process modelling in the minerals sector and he is passionate about exploring the potential of machine learning and data-driven approaches to improve our understanding of complex systems and drive technological advancements.

#ProcessMineralogy26