Thursday 29 September 2022

The Future of 3D Characterisation in Automated Mineralogy

Process Mineralogy '22, MEI's first face to face event in 3 years is only just over 4 weeks away and it is good to see the interest in this conference, which will be held in Sitges, Spain from November 2-4.

We are very pleased that the partners of the EIT Raw Materials funded project 2D3Dscopy will be running a workshop on "The Future of 3D Characterization" immediately prior to the conference. The workshop will provide insights into the latest developments in 3D particle characterization and particle-based process optimization. The workshop is organised by Metso:Outotec, Tescan, Ghent University and the Helmholtz Institute Freiberg for Resource Technology.

The world is 3-dimensional, but resource characterization is limited to 2-dimensional data. Being able to use 3D instead of the common 2D data is a major breakthrough in minerals processing and metal extraction. It helps to image the reality and  enable the reliable prediction of information about mineral recovery as well as the improved characterization of material residues.

An important new measuring routine and software, that combines 2D and 3D data and allows for an unprecedented optimization of mineral recovery and energy efficiency as well as the minimization of residues, has been created. By applying the new technique it is estimated to save 5% of the energy in the entire process from metals exploitation to refining. It can be used for material quality control but also for the prediction of material behavior.

In  developing this breakthrough, the partners merged quantitative 2-dimensional data from scanning electron microscopy (SEM) with 3-dimensional data from spectral computed X-ray tomography. SEM-based image analysis tools are standard in resource characterization and provide chemical information about mineral distribution or structural parameters such as particle size or mineral association, but in 2D only. Computed X-ray tomography, on the other hand, provides direct structural 3D information in a non-destructive manner, but lacks any chemical information. However a new type of detector will obtain additional chemical 3D information, a technique which will be unique for the resource sector.

There is much to look forward to in Sitges, and we invite you to register for the workshop, and for the conference.  The full programme can be found on the website and we thank once again our valued sponsors.

#ProcessMineralogy22

Sunday 25 September 2022

A nostalgic safari in northern Tanzania

Fifty-one years ago Barbara and I, along with friends, the late Vic Bryant and his wife Jo, and their young son Andrew, undertook an epic journey from our home in Zambia for what we planned to be a 6000 miles (9500 km) East African tour through Tanzania into Uganda, then into Kenya, returning to Zambia from Tanzania’s Indian Ocean coast.  The maps showed us that most of the roads would be dirt, but we had encountered dirt roads in Zambia. Unfortunately, however, we could not have envisaged how bad these roads would be, suitable really only for four-wheel drive vehicles, not our family saloon cars.

The drive from our home in Chingola to the Tanzanian border at Tunduma was 720 miles (1150 km), and was the easiest stretch of the journey. For good reasons, the Great North Road in Tanzania had earned the name ‘hell-run’. Since Rhodesia’s Unilateral Declaration of Independence, it had provided Zambia with a lifeline for supplies of oil from the port of Dar es Salaam. Fleets of huge trucks, including dual-purpose tankers, carried both petroleum imports and copper exports, overburdening the road and leading to deplorable conditions and an appalling accident rate. Winding through rain forests, game plains and mountain ranges, the road was regarded by many as the world's worst international highway. Blinding rains and eerie mists made it all but impassable from October to May, and the right-of-way was often taken by rhinos, herds of elephant and lions basking in the sun. 

The road lived up to its name. The 113 km from the border to Mbeya took over 2 hours on a surface containing pot-holes resembling bomb craters, but eventually, battered and bruised by suitcases flying around the cars, we arrived at the Mbeya hotel for our first overnight stop.

Respite at Mbeya

It took us three days to cover the next 745 miles (1190 km) to Arusha, with overnight stops in Iringa and Dodoma. The scenery was striking and varied, initially over wild mountain passes which led to tea and banana plantations and then into ‘real Africa’, the savannah, endless plains of corn-coloured grass and the distinctive flat-topped acacia trees.

The roads from Mbeya had varied from bad to atrocious and we had to make running repairs to the cars throughout the journey. Vic had a puncture repaired in Mbeya and then had another just before Arusha. The terrible flint and broken rock surface between Mbeya and Iringa jarred bones and teeth, and dislodged the bolts in my gear selector, which we had to patch up with bolts and screws taken from the car bonnet. We had close encounters on the narrow, precipitous mountain pass with convoys of trucks travelling to and from Zambia. Between the capital, Dodoma, and Arusha we hit a 30 km stretch of road which beggared belief and the cars threatened to completely fall apart. Vic’s car sustained another puncture and my petrol tank holed, but patched up with chewing gum and leaking petrol all the way, we finally limped into Arusha.

Approaching Arusha on a relatively decent road

The highlight of our journey was the wonderful area near the Great Rift Valley, Lake Manyara National Park, the Ngorongoro Crater and the Serengeti National Park, and we vowed that one day we would return. Earlier this month we did just that, 51 years on, a half century anniversary postponed for a year due to Covid restrictions.

Source: whileinafrica.com

This time we arrived in Arusha in style, after long flights from London Heathrow to Doha by BA and then on to Mount Kilimanjaro Airport, where we were met by our driver from the always excellent Audley Travel, who transferred us to the Rivertrees Country Inn in Arusha.

In 1971 we camped for three days in the Lake Manyara National Park, a narrow strip of land between the Great Rift Valley escarpment and Lake Manyara, a shallow alkaline lake described by Ernest Hemingway as the loveliest lake in Africa. This month we stayed two nights in the Ngorongoro Farmhouse in Karatu from where we visited Lake Manyara National Park and the Ngorongoro Crater, one of the wonders of the natural world, a volcanic caldera in the Rift Valley.  

Fifty-one years ago we managed to see many elephants at Lake Manyara in the clearings in the lush tropical canopy, where lions lazed in the trees during the heat of the day. On this visit we saw little apart from a small family of elephants, but that is the nature of safari, you may see nothing at all, or have the experience of a lifetime.

Lake Manyara 1971 and below a fleeting glimpse of a small family of elephants in 2022

Ngorongoro Crater, the world's largest extinct volcanic caldera, teems with life, huge herds of wildebeest, zebra and gazelles, and the ever present lions. The caldera is home to diverse habitats, a vast plain, lush forests and fresh water and soda lakes.

 In 1971 we camped on the crater rim amidst grazing zebras and grotesque marabou storks, from where we descended the precipitous track in a chartered Land Rover to the crater floor 600 metres below, into what can only be described as a Garden of Eden. 

Ngorongoro Crater seen from the rim
1971

Half a century later the Crater certainly didn't disappoint.

Back to 1971, and after wonderful days at Lake Manyara and Ngorongoro, the situation with the cars became a familiar reality again. Although we had covered only 140 miles (225 km) since leaving Arusha, the roads had been of the usual standard, and had taken their toll; the steering bushes on my car were in a bad state and Vic’s car had a holed radiator. We patched up as best we could and then reluctantly returned to Arusha for more major repairs. The front suspension on my car had to be removed to replace the steering bolts which had fallen out, and the radiator drain plug hung by a thread.

The next afternoon we left Arusha once more for the 200 mile (320 km) drive to the Serengeti, along the familiar corrugated dusty roads, through the Olduvai Gorge, the Cradle of Mankind, to the beautiful Seronera Valley where we camped for two nights. 

The Olduvai Gorge monument, 2022

Camping in the Seronera Valley, 1971

On our journey to the Seronera this month we encountered lions, elephants and elusive leopards.

As in 1971 we camped in the Seronera Valley, in the Lemala Ewanjan Camp, a remote location where we could lie in our tent and hear the wild calls of Africa, including nearby lions and hyenas, who were fortunately not as close as Amanda experienced 10 years ago with her frightening encounter with lions in her camp in the Serengeti (see Tales of Wild Africa).

Passing by the resident Marabou Stork en route to an early breakfast

On a long day out with our guide we saw many more lions and truly experienced the tremendous diversity of African wildlife and the beauty of these magnificent animals and the wilderness which is their habitat.

The dik-dik is one of Africa's smallest antelopes
Wildebeest congregate for the great migration.....
....while a lioness looks on with interest
Look both ways! Cheetah ever vigilant

All too soon our safari came to an end and after three nights in the Serengeti we left mainland Tanzania for a few days relaxation in Zanzibar, via a 3 hour flight from the Seronera Airstrip.

Farewell to the excellent staff at Lemala Ewanjan Camp
Leaving the Serengeti at the Seronera airstrip

Back in 1971 our adventure was by no means over, however, as we headed north from Seronera on a dire road to Mwanza, little knowing what fate awaited us on the opposite shore of Lake Victoria (see Adventure in Tanzania).

Safari is a magical experience, but a tiring one, involving great distances on dusty, bone shaking roads. The roads had certainly not changed in half a century, but the traffic certainly had. Goodness knows how we managed all this, and a great deal more, in our old Ford Corsair - our guide and others were totally incredulous. But 51 years ago we were 51 years younger!

These days all vehicles in the safari area are 4-wheel drive, owned by the many safari companies, and while in 1971 we might not see another vehicle for hours, now they are in profusion, and at one lion sighting we counted 40 vehicles waiting in line! The animals have become accustomed to their presence and the larger ones have no fear of them, which is good as all shooting is by camera and it is hard to understand why anyone would want to kill these magnificent beasts.

It was wonderful to visit Tanzania and its friendly people again after all this time, and we thank Arista Midwinter at Audley Travel for putting together this tailor-made trip and to our excellent knowledgeable guide, Noel Mollel, for spotting things we would have missed and for teaching us more of this fascinating continent.

@barrywills

Saturday 24 September 2022

Memories of Minerals Engineering '02, Perth, Australia

The 12th Annual Minerals Engineering Conference began 20 years ago today in Perth. It was organised by MEI in association with Australia's CSIRO Minerals Division and sponsored by Outokumpu Technology Pty Ltd, CSIRO, and the Minerals Gazette, published by Australia's Resource Information Unit. Around 80 delegates from 17 countries attended.

Unfortunately only a couple of photos, shown below, survive in our archives.


Wednesday 21 September 2022

Dr. Tony Batchelor, 1948-2022

I was shocked to hear that Dr. Tony Batchelor, the 'father of Cornish Geothermal Energy' died on Monday in Truro, aged 74.

Tony and I go back a long way, as he was a young and enthusiastic lecturer in rock mechanics at the Camborne School of Mines (CSM) when I began lecturing in 1974. Despite being modest and unassuming it was obvious even then that he was destined for greater things and during his 12 years at Camborne he developed his interest in geothermal energy, serving as Project Director for the UK Hot Dry Rock Geothermal Project at the Rosemanowes quarry near Falmouth from 1976 to 1991.

In 1985 he co-founded Geoscience Ltd, based in Falmouth, to provide geomechanics engineering for both the planning and execution phases for many well operators worldwide. From 2014 he was Chairman and Wellbore Rock Mechanics Group Lead at GeoScience Ltd

Tony had more than 30 years’ experience in the industry and was recognised as a world expert on geothermal energy. At GeoScience Ltd. he worked on geothermal projects around the world, including Japan, Turkey, Indonesia and the USA. He served as a Member of Technical Advisory Board at KUTh Energy Limited and as a Founder Member of the International Geothermal Association (IGA), serving on the IGA Board. He was a consultant to the United Downs Deep Geothermal Power Project, which commenced drilling in November 2018 (posting of 1st November 2018).

If all that wasn't enough, he never forgot his CSM roots, and was Chairman of the CSM Trust, passing on to me snippets of information which I have used extensively on the blog to show the progression of CSM. He has been a Cornish Mining Sundowner stalwart and I an sure that all his friends in Cornwall, and around the world will miss him and I invite them all to add their appreciations and memories of a truly great scientist to this posting.

My last photo of Tony (left) at the July sundowner in Falmouth

Our sincere condolences to Tony's wife Linda,  their son and daughter, James and Charlotte, and grandchildren Emily, Madeleine and Ottilie.

Monday 19 September 2022

Back home to a nation in mourning

Barbara and I arrived back in Falmouth last night after two weeks in Tanzania. We heard of the Queen's death during our first week and everyone we met, from many nations, expressed their admiration for her ceaseless devotion to duty over 70 years (posting of September 9th). Very few people who are grieving will have actually met the Queen, but I am pleased that I had the opportunity of doing so in 1980 when she and Prince Philip visited Camborne School of Mines.

We arrived back in time for the magnificent spectacle of today’s state funeral, which brings closure and the end of an era. Queen Elizabeth II has been an ever present part of life in the UK and in many parts of the world for almost three quarters of a century, and we can now remember her in our own ways and proceed with the next chapter under the rule of King Charles III.

Monday 12 September 2022

Official opening of the Frank White Memorial Garden at the University of Queensland

I thank Franklin White, son of Frank White, for sharing this article on the blog.

On June 28, 2022, The University of Queensland (UQ) honoured the late Professor Frank T.M. White with an official opening of the Frank White Memorial Garden, within the UQ Engineering precinct. The event was attended by invited guests, many present in person, others participating via Zoom. 

Frank White was a trailblazer. A graduate in metallurgy from the University of Melbourne, he first worked in the gold mining industry of Western Australia in several roles from that of metallurgical chemist to mill superintendent to mine manager. He set up the Department of Mines in Fiji, where he developed the first geological survey map of the main island, and launched the mines inspectorate. And, following the Second World War, he led the rehabilitation of tin mines in Malaya, where he also qualified (under the British system) and practised as a magistrate in mining law.  

Appointed in 1950, as UQ’s founding professor of mining and metallurgical engineering, he was an early advocate for hands-on learning and for gender and cultural diversity in the industry he loved. Professor White was instrumental in establishing the University of Queensland Experimental Mine (UQEM) at Indooroopilly, which has become the Julius Kruttschnitt Mineral Research Centre (JKMRC) – the largest Australian research centre of its kind. He was also a major force in establishing the iconic UQ college International House, which remains a vibrant hub of diversity and cross-cultural learning. 

The opening was moderated by Professor Alice Clark, Deputy Director – Strategy, Sustainable Minerals Institute.  Proceedings began with an address by Professor Deborah Terry AO, Vice-Chancellor and President, UQ.  While her presentation focused mostly on the life and contributions of Frank White, Professor Terry took the opportunity to announce that, in 2023, UQ will launch an annual Frank White Memorial Lecture.

Professor Terry then introduced Emeritus Professor Don McKee, who spoke from his perspective as a former student of Professor Frank White.  In closing, he introduced Dr Franklin White, son of Professor White who addressed guests via Zoom from his location in Victoria BC, Canada. In this presentation, he elaborated in some detail more about the personal history and philosophical values of his father.

For a flavour of the man, the following is extracted from Franklin White’s presentation: 

In many ways, Frank White’s life story is a romantic tale, because it’s doubtful if such a varied career would be possible today: perhaps the original pioneering can only be done once. His was a "Golden Age" when a competent generalist could take on many challenges now deemed to require a specialist. His gifts and contributions now belong to University folklore. Often referred to as “a man ahead of his times”, even “visionary”, I would balance this by recognizing that he was also “a man of his times”. 

To fully appreciate a person’s life, one must know something of the whole journey. Frank and Tess were born in the first decade of the 20th Century - an era of Imperialism and Colonialism. However, what distinguishes people is what they do to help change those systems once they discover the underlying realities. May we all do as well.

Frank White was committed to mining and metallurgy as integrated fields, virtually seamless through mineral processing, much of which (as extractive metallurgy) may take place on site. He felt strongly that they should be taught side by side as complementary disciplines. He was passionate about their human and environmental impacts at a time when these were not considered mainstream concerns. Beyond the science and technology, his interests ranged from safety and health to the sustainability and social dimensions of resource communities, and how well these were understood and valued by society as a whole. 

One of his colleagues, a family friend, once expressed anxiety to me that this part of his message was not going down well with some industry leaders. Would I talk to him about this? But I didn’t, at least not in the manner implied. History shows that he was on the right track. If alive today, his mission would still be to educate people about the societal roles of mining and metallurgy, the earth and material sciences. 

He was adept at distilling principles of good practice into memorable kernels. To quote from one of his papers: 

“Mining is not simply about digging out the ore, but is an essential beginning for complex processes that affect virtually everything, and how well this is done matters for everyone.”  

On attracting young people to the field, he did not believe that the best and brightest were motivated only by earning a living, and would focus instead on the intrinsic interest of the field, its inherent challenges, and the value it confers to society. 

He strongly believed that the best teachers should emphasize undergraduate education, because once a student had committed to postgraduate studies, they were sufficiently motivated to become their own best teachers. He would advocate: “Even if you don’t rise in your profession, raise your profession”, reflecting his support for professional societies such as AusIMM.  Other aphorisms included: “never stop thinking, never stop learning, and apply what you learn”, and (while valuing aspirational goals) he would insist: “promise what you can deliver, and deliver what you promise.” 

Inspired by their formative experiences of living and working in Fiji and Malaya for a combined total of 12 years, Frank had become an exponent of intercultural learning, and of the value of gaining experience from more than one institution or organization. His success in attracting Colombo Plan and other international students gained him recognition in breaking down traditional barriers to enrollment at UQ, which led in turn to his appointment as the first Warden for Overseas Students in 1954. The role was voluntary, and in addition to his departmental leadership duties, but gladly taken on at the request of the Professorial Board.

Captured by Basil Shaw in his official history of International House, the following extract from Frank’s speech in the mid-1950s, merits repeating here (and I quote): 

“…students have brought with them their cultures, their philosophies, their… customs… Their presence among us affords a unique opportunity for the promotion of international understanding… a University and community responsibility (to) promote the values and cultures of other peoples… the means by which the people of one country can live at peace with those of other countries… and the needs to explore ways of reconciling values which appear to conflict, and for training leaders…” 

As recorded by Board Chairman Bert Martin in the 1961 annual report: “It was he who… conceived of the college, and understood the labyrinthine… university politics”.

This Garden therefore is a tribute to Frank White’s dedication to generations of students both in Australia and from abroad. 

But its roots in “a love of nature” run even deeper: during his elementary schooling, he joined the Gould League of Bird Lovers, pledging “not to collect their eggs”; likewise, a League of Kindness, pledging “I will be kind to all living creatures and will protect them as far as I can from cruelty.” He was interested in botany, raised silk-worms, collected rocks and minerals and could name them all.  

Much later in life, when launching the University of Queensland Experimental Mine (UQEM) for teaching and research, an early decision was to invite the Department of Botany to use UQEM as a field site: indigenous flora were tagged as an educational resource.  This is why the flora you see in this garden today are native plants, thanks to Botany for guidance in their selection.

Professor Clark thanked Dr White for his presentation, then introduced Mr Jashneel Datt, a recent graduate and recipient of the 2021 Frank T. M. White Prize.  Mr Datt, also a former president of UQ’s Mining and Metallurgical Association, a student body, addressed guests from the perspective of current students. 

Following these presentations, a montage depicting vignettes from Frank White’s life was shown on screen, following which guests retired to the Memorial Garden, for conversation and refreshments.

Subsequent to the Official Opening of the Frank White Memorial Garden, UQ produced a video of the proceedings.

Epilogue: In 1966, Professor White’s accomplishments in building a strong foundation for mineral sciences and engineering at UQ, led to his recruitment by Canada’s McGill University to revitalize their department of mining engineering and applied geophysics; the closing chapter to his unusual story.

Frank White with new McGill graduates in 1970

To learn more about the life and times of Professor Frank White (1909-71), Miner with a Heart of Gold, Biography of a Mineral Science and Engineering Educator, authored by Franklin White, with a Foreword by Barry Wills.