Friday, 4 March 2022

New book: Practical Ore Mineralogy

I am pleased to see a new book on ore mineralogy published, as MEI's 6th Process Mineralogy conference will be held this November in Sitges, Spain.

Practical Ore Mineralogy aims to assist mineral processing engineers who have received minimal training in identifying minerals during their degree. It presents simple techniques to identify minerals in hand specimens not requiring sophisticated instruments. There is also a description of the main ore mineral groups and their mineral associations. 

The author of the book is Mike Wort, who trained as a Mining Geologist at the Royal School of Mines, Imperial College in London, and his first job was at Bibiani, an operating underground gold mine in Ghana. In 1965 he joined CRA Exploration, and spent two years in Papua New Guinea and the Solomons, with most of his time spent at the Bougainville copper deposit.

In 1968 he completed an MSc in Mineral Process Design and then returned to Australia to work as a mineralogist and mineral processing engineer, gaining experience at AMDEL in Adelaide, Mount Isa in Queensland, and the heavy mineral sands industry south of Perth. In late 1976 he returned to Imperial College for PhD studies on the magnetic properties of altered ilmenite, returning to Australia in 1980 to gain further experience with a range of companies including BHP, WMC, Greenbushes Tin, the WA Mines Department and Rio Tinto. In recent years he has focused on plant design and feasibility studies, chiefly for the iron ore and gold industries, with some consulting for the lead-zinc industry around the world.

The book's content draws on Mike's research over the last 50 years and mineral industry experience from around the world and includes information from both the fields of Mining Geology and Mineral Technology.

Tuesday, 1 March 2022

February: Living with Covid; travelling again; the green energy transition

Early in February a director of the World Health Organisation said that Europe is entering the "plausible endgame" of the pandemic, and last week all Covid laws in England ended, including the need to self-isolate after a positive Covid test. Cynics would say that, with infection rates still high, this is a political move to divert attention from Downing Street parties. The move took many experts by surprise, with one describing it as either brave or stupid. Time will tell. 

Also last week, on the 21st, Australia reopened its international border to all fully vaccinated travellers, two years after the border closure. Three days later I took the train from Truro to London, on the day on which Russian President Vladimir Putin launched his unprovoked invasion of Ukraine. 

The front page of The Times says it all

A day later, after taking a Covid-test at Heathrow I at last boarded a plane again, bound for the USA, and now here I am in Utah at the SME Annual Meeting in Salt Lake City.

The 'new normal'

With socialising in England now back to 'normal', the day before the mining sundowner in Camborne I met up with Mike Joll, who hosted me in Ipoh, Malaysia, when I visited the alluvial tin mines in 1981 (posting of 25 May 2020). Mike worked for the tin mining company Osborne and Chappel, and he is co-author of a book on Malaysian tin mining.

Dinner with local miners in Ipoh in 1981 (Mike Joll is 4th from left)

Mike left Osborne and Chappel in 1982 and worked at the now abandoned Mamut open pit copper mine in Sabah, Malaysia, before returning to Ipoh, sourcing ilmenite for a titanium plant. Subsequently he was in Indonesia, West Africa, Philippines and Laos involved in alluvial mining/prospecting for diamonds, gold and tin. After such an interesting life he is now retired in Callington, east Cornwall and we hope to see him at future mining sundowners.

41 years on, with Mike in Truro

Energy was very much in the news last month, particularly the rising gas prices, partially caused by resurgent global demand, and which will soon be exacerbated by the war in Ukraine and the sanctions imposed on Russia, a major supplier of gas to Europe. Despite major oil companies declaring huge profits, many people are struggling to heat their homes, and there have been calls for a windfall tax on these companies. 

Someone tweeted that now is the time to switch to renewables, and this immediately went viral with thousands of likes. If only it were that simple, but it isn't of course. Even the Government at last are beginning to realise that fossil fuels will be needed for the transition to green energy and Chancellor Rishi Sunak has said he wants to encourage more investment in new fossil fuel drilling, with reports that six new oil and gas fields are to be approved in the North Sea this year.

"Bring back fracking", said the newly appointed Brexit opportunities minister, the ludicrous Jacob-Rees Mogg, in one of the few sensible statements he has ever made. This is unlikely to happen, however, as this controversial method of extracting shale gas was banned in November 2019 amid concerns that it was causing earthquakes. Cuadrilla, the company involved with the project near Blackpool in Lancashire are to plug and abandon two shale gas wells as many protests took place at the site. 

Wind energy did come to the fore, however, on the 18th of the month when the UK was hit by the worst storm in 30 years. Storm Eunice caused havoc and wind turbines produced 39% of the UK's energy on that day; this compares with 19% over the course of last year.

Central to the transition to green energy is the move to electric vehicles, and the UK has a target of ending the sale of new petrol and diesel cars by 2030. However the government has been warned it is falling dangerously behind in its plans to build a British battery industry, with manufacturing capacity forecast to be barely half the needed level by the end of the decade, according to data produced by Benchmark Mineral Intelligence, one of the world's leading authorities on the battery industry. The report shows that the UK will have to increase the supply of lithium, cobalt and graphite, critical ingredients in battery production, by staggering amounts, as much as 90 times the current level, to have any hope of supplying that industry. With hundreds of thousands of jobs dependent on the transition, this raises deep questions about Britain's economic trajectory in the coming years. The figure below shows how much the UK will have to increase its supplies of lithium, cobalt and graphite by 2030.

There was some good news on energy, however, as for 5 seconds a laboratory in Oxfordshire became the hottest spot in the Universe, breaking the world record for the amount of energy produced by nuclear fusion (see Visions of the Future). There is a long way to go, however, before fusion becomes a viable commercial operation, and it certainly won't solve the current energy crisis, and is unlikely to contribute to the goal of zero carbon by 2050 (posting of 21 July 2019).

And finally, on a personal note, get well soon Jon. He has been hobbling around on crutches after tearing a calf muscle in a cycling accident in late January, ironically after some serious skiing in Oregon a couple of weeks earlier.

@barrywills

Thursday, 24 February 2022

Good to be back on the Cornish Riviera Express

Two years on I am at last travelling again on the Cornish Riviera Express from Truro to London Paddington, from where I will take the Heathrow Express to the airport and then, Covid-test permitting, on to Salt Lake City tomorrow for the SME Annual Meeting, my first face to face event since the SME Meeting in Phoenix in February 2020.

Through trains from London Paddington to Penzance began running in 1867 but the Great Western Railway's Cornish Riviera Express commenced operation in 1904, after standardisation of the track gauges between Truro and London and Truro and Penzance. The 255 miles from Penzance to London is regarded as one of the world's great rail journeys particularly the stretch from Penzance to Exeter, a testament to the marvel of Victorian engineering.

It's not easy to build a railway in Cornwall, a rugged county, the remnants of the ancient Variscan Mountains. The Cornwall Railway Company constructed the line between Plymouth and Truro, which opened in 1859, and was extended to Falmouth in 1863. The 70 mile route from Truro is generally west to east, and cuts across numerous deep river valleys that generally run north-south. Under the guidance of the Victorian railway engineer Isambard Kingdom Brunel, the river crossings were made by wooden viaducts, 42 in total, replacement by masonry structures beginning in the 1870s, a few remaining in service until the 1930s.

Crossing the River Tiddy via the viaduct at St. Germans

Leaving Cornwall, the most spectacular river crossing is via Brunel's Royal Albert Bridge, opened in 1859, which crosses the River Tamar at Saltash (reputably where the Wills family originated!) and leads into Plymouth in Devon. It is adjacent to the Tamar Bridge which opened in 1962 to carry the A38 road.
The Royal Albert railway bridge in the foreground, adjacent to the Tamar road traffic bridge

Once into south Devon the scenery begins to change dramatically, and between Newton Abbot and Exeter Cornwall's ancient Devonian rocks are replaced by the softer New Red Sandstones of the Triassic, the line cutting through a number of tunnels as it runs dramatically along the coastline at Dawlish. Often under siege by winter storms it is not unusual for the English Channel waves to crash over the carriages as the train approaches nearby Exeter.

Through the sandstone cliffs at Dawlish
Photo: BBC
Winter storms
Photo: The Railway Magazine

Once past Exeter and into Somerset another major change in the landscape as the train speeds over flatter terrain on its long journey to London, passing through the flat marshlands of the Somerset Levels, which are often flooded.

Flooded Somerset Levels

This is the area of the ancient Kingdom of Wessex, where the Wessex king, Alfred the Great, hid in the swamps and marshes with his men in 878, dependent on the local people for food and shelter, whilst fighting a guerrilla-style war with the Vikings, and it was from here that Alfred set out on the successful reconquest of his kingdom.

The Truro to London journey I must have done hundreds of times, via the branch line from Falmouth to Truro, but I never tire of it. I only journey from Truro to Penzance occasionally however, but this is also a spectacular short trip, passing through the tin and copper mining areas between Redruth and Camborne, where the landscape is dotted with the ruins of 19th century engine houses.  And as at Dawlish, the trains skirts the English Channel, passing by the iconic St. Michael's Mount as it approaches Penzance.

Wheal Peevor near Redruth
Approaching Penzance. St. Michael's Mount at Marazion

If you intend to visit Cornwall then do so by rail if you can. It sure beats the road journey!

@barrywills

Tuesday, 22 February 2022

Thanking you all for your kind thoughts on my retirement from Minerals Engineering journal

A massive thanks to those who have submitted comments on last week's posting where I announced my impending retirement from Minerals Engineering journal and to those of you who have been in touch by email, LinkedIn and Twitter.

I have been overwhelmed by your kind thoughts, but must clarify that my retirement is only from the journal; I will continue my involvement with MEI and the conferences, and of course the blog.

Now restrictions are easing I fully intend to travel around the world again, reporting on conferences, and hopefully, Covid-testing permitting, I will be in Salt Lake City next week for the SME Annual Meeting.

Thanks again.

Monday, 21 February 2022

IntegratedMinPro '22: Final Call for Abstracts

A reminder that the second of MEI's online events this year is now only 3 months away, so if you are planning on submitting an abstract then we invite you to do so by the end of March.

Integration, Optimisation & Design of Mineral Processing Circuits (IntegratedMinPro '22) will be held online from June 13-15 2022.  This will be MEI's 1st conference of hopefully a long series.

As the demand for resources continues to increase, and amidst growing challenges of processing complex ores while minimising energy and environmental impact, we are entering an exciting time for innovation in mineral processing. Innovation in individual unit operations is complemented by innovative approaches to the entire mineral processing flowsheet, from rearrangement of an existing circuit to a new approach for a greenfield development.

This conference invites papers on new approaches to mineral processing circuits, whether through design, modelling, optimisation or operation. This includes integration of unit operations (e.g. comminution and flotation), novel flowsheets that incorporate new equipment and new approaches to optimising circuit design.

This exciting new conference will cover:

  • Optimisation and integration across different unit operations
  • The integration of new equipment into existing flowsheets
  • Circuit layout design; modelling and optimisation
  • Equipment selection methods

The conference is sponsored by Promet101 and Hudbay Minerals. Our Media Partner is International Mining, and Industry Advocates are the Coalition for Eco-Efficient Comminution (CEEC), Cornwall Mining Alliance and the Critical Minerals Association.

#IntegratedMinPro22

Friday, 18 February 2022

Back to Camborne for the February Cornish Mining Sundowner

Traditionally Tyacks Hotel in Camborne has been the preserve of the Christmas Mining Sundowner, but we were back again last night, with only a small turnout of 11. This was not surprising, as a red-alert weather warning had been issued for SW England due to the approaching Storm Eunice, the 'storm of the century', which was expected to cause major travel disruption. Eunice arrived in the early hours of this morning and many rail services are now closed, including the Falmouth to Truro branch line which I used last night.

I have to admit that I have been overwhelmed this week by the response to my announcement on Monday that I would be leaving Minerals Engineering journal this year after 35 years as Editor-in-Chief. I worked with many Elsevier Publishing Managers over those years, and the longest serving was Dean Eastbury, who became a great friend to all of us at MEI, and having retired to Cornwall is now a regular at the sundowners. It was good to reminisce with him last night on the 'golden years' of the journal.

Dean with the MEI team in Cape Town in 2017

And it's always good to catch up with Carol Richards, a Director and Honorary Secretary of the Camborne School of Mines (CSM) Association. She is always busy; at the moment she is organising the next CSM Annual Dinner, which will be in Falmouth on March 19th, two days after the Falmouth sundowner at the Chain Locker.

Dean (right) with Carol, and Nigel MacDonald

Carol is also one of the Trustees at King Edward Mine Museum, only 12 miles from Falmouth, and without doubt one of the world's finest mining museums, and an absolute must for anyone interested in early mining industry. The mine was formerly part of South Condurrow Mine, which was abandoned in 1896. Re-opened and developed as a fully operational/training mine by CSM, KEM was used up to the mid 1970s when the mill became a store. In 1987 a volunteer group was formed who restored the mill using rescued machinery. There are very few, if any, places in the world where you can see 19th century gravity concentrators, such as round frames, buddles, Frue Vanners and rag frames, in operation (posting of 29 April 2019).

KEM volunteer guide Nigel MacDonald explaining the working of rag frames
 to MEI Conference delegates

Carol told me that the museum is expecting a busy summer May to September 2022. The exhibitions have been refreshed to include geology and there is a new  children's area. The museum has a big team already but is especially keen to welcome  people who would like to become  volunteer guides or work in the shop. See the  volunteer video for some of the activities that take place. If interested, please contact info@kingedwardmine.co.uk.

The next sundowner will be on Thursday March 17th, from 5.30pm at the Chain Locker pub in Falmouth.

@barrywills