Follow the latest news from Grinding Solutions and staff on our blog.
Follow the latest news from Grinding Solutions and staff on our blog.
Several members of our team attended the Physical Separation ’17 conference organised by MEI in nearby Falmouth, and we sponsored the evening drinks at award-winning real ale pub ‘The Front’. The conference was very well-attended, with some big names from the industry turning up, and many interesting new concepts were presented. Conference reports can be found here on MEI’s blog.
On the back of the conference, we have had several exciting visits at Grinding Solutions week. On Wednesday we were visited by Bill Weldon of Australian company Mineral Technologies Pty Lt. Grinding Solutions and Mineral Technologies are finalising an agreement which will see us install five of their spiral separators to provide gravity separation capabilities. The following industrial-sized spirals are due to be installed at our facilities in this summer:
We have also recently expanded our hydrocyclone offering, we now have 1cm, 1”, 2”, 3” and 5” hydrocyclones available with a range of shapes (stub and conventional), spigots and vortex finders, enabling us to do hydrocylcone test work in the 1 – 70µm range. By providing flexible desliming capabilities, the hydrocyclone/spiral separator combination provides an effective solution for gravity separation projects.
Also visiting on Wednesday was Jens Bergmann of TOMRA, who provide a range of automated sorting solutions for the mining and recycling industry. At GSL, we see automated sorting as an area of mineral processing with great potential for growth, which is an opinion shared by many in our industry judging by preliminary results from our innovation survey (LINK TO BLOG POST) (more on this to follow soon). Sorting technology is developing rapidly compared to other fields of processing technology, and it was interesting to hear about the latest developments in this field from Jens such as the ‘Lightsabre’ laser sorting technology.
On Thursday Steve Flatman and Mike Battersby of Maelgwyn Mineral Services visited to discuss the installation of a 15kW stirred ceramic media mill as well as the commissioning of the MMS Aachen Reactor , both of these technologies will be available for test work in our expanded laboratory facilities in the next few months.Back to top
Grinding Solutions is excited to welcome David Coulton and George Riley to continue to work on innovative and exciting technologies in the mineral processing industry.
David is currently in his 2nd year at Camborne School of Mines. He is working with Klaas van der Wielen to streamline and verify a statistical simulation of flotation mass yield, recovery and concentrate grade incorporating losses and dilution from liberation analysis data. Once verified, the simulation will allow Grinding Solutions to give fast and reliable results to clients without requiring large amounts of test material. In the future, the simulation has the potential to be tailored to almost all separation techniques, making it an excellent tool for prefeasibility studies.
In addition to this, David will be assisting our metallurgist Jack Carr in final preparations for publication of his Masters project on biohydrometallurgy, and the effects of fine grinding as a pre-treatment of biological leaching. This is also an area that Grinding Solutions are expanding into, with preparations nearly complete for the set-up of our new cyanide, hydrometallurgical and bio-leaching lab.
George is currently studying for a master’s degree at Camborne School of Mines in Mining Geology after reading Geology at University College London which he graduated with first class honours.
George’s masters project is being carried out in conjunction with Grinding Solutions and Chris Bryan at the Environmental and Sustainability Institute (ESI) at the University of Exeter. This research and development project is also linked with a major mining company. The aim of the project is to investigate the processing of a copper slag material. This will involve grinding and flotation test work at Grinding Solutions, to produce a sulphide concentrate at a range of size fractions. The resulting material will then be used to perform as series of chemical and biological leach tests at the Biohydromet labs on the University of Exeter Penryn campus. The project also aims to explore the possible benefits of ultrafine grinding techniques as a pre-treatment for bioleaching of a polymetallic sulphide concentrate.
Grinding Solutions recognises that innovation can play an important role in the future of the mineral processing industry. Have your say on the role of innovation in the industry via this anonymous and short survey:Back to top
We are looking forward to Physical Separation 2017, set to be another well prepared and arranged MEI Conference.
Areas of significant interest include ore sorting techniques, where technological advances have resulted in capital and operating costs reductions, enabling primary upgrading of ore. This can result in doubling the feed head grade of many deposits. Understanding the mineralogy and liberation is essential for these processes to work efficiently, which is where we are currently focussing a great deal of effort in collaboration with Petrolab (another Cornish company, based in Redruth). Upgrading prior to grinding and processing can give significant reduction in plant operating costs albeit at the expense of some recovery. Mineral identification, quantification and size estimation is a theme that runs through all physical separations and is a key technique we use in most of our project evaluation work. These techniques also apply to all the subjects included in the Physical Separation programme.
Following Day 1 of the conference and the Guided Coast Path Walk we’ll be buying a round at the The ‘Front, Custom House Quay Falmouth, TR11 3JT, Thursday 15th June. See you there!
Keep in touch to see how these themes develop and extend across MEI’s Flotation ’17, Comminution ’18 and Process Mineralogy events. We are proud to be sponsoring Comminution ’18.
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As part of our ongoing expansion, we have taken delivery of a filter press, kindly on loan to us from Siltbuster. The unit consists of 11 plates measuring 25×25 cm, giving a working volume of 10l. Currently a low-permeability (1.1 l/dm2 min) multifilament cloth is installed for clay applications, but other, higher permeability cloths (up to several orders of magnitude) are also at our disposal for treating of other materials.
Whilst not constituting a piece of ‘test equipment’ as such, it will allow us to work considerably more efficiently on projects that produce a lot of slurry with fine material, such as a recent pilot plant project for blunging and classification of clay prior to magnetic separation and calcination.
Should you have any questions about the specifics of this unit or other services we offer, then please feel free to contact us.
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Mike Cook has joined the Grinding Solutions team as a Senior Project Metallurgist today. Mike joins from SGS Mineral Services and has a wealth of experience in leaching and flotation. Mike has 10 years’ experience in the industry and has an MSc in Mineral Processing and Extractive Metallurgy from Camborne School of Mines.
‘We are very pleased that Mike has chosen to join the team which expands our expertise and capabilities in leaching and flotation. With Mike joining and new lab space coming online in two months’ time we’ll have column and bottle rolls to enable us to provide leaching services which will extend our offerings to our clients.’ Nick Wilshaw, Managing Director
If you would like to discuss any of these new services please get in touch.Back to top
We are pleased to be sponsoring this month’s London Mining Sundowner on the 27th April 2017. Organised by Liv Carroll and supported by MinSouth and IOM3 in cooperation with the Association of Mining Analysts (AMA), the event is scheduled to begin at 5:30pm at:
The Kings Arms
Managing Director, Nick Wilshaw, and Senior Metallurgists, Klaas Peter van der Wielen and James Gaydon look forward to meeting up with anybody that drops in.
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The latest member to join the expanding Grinding Solutions team is James Strong. James is joining as Marketing Manager and will also be working with the team to put in place systems and business processes to enable further growth. James has extensive previous experience in a range of commercial roles at Reflex Marine, a growing international SME in the offshore Oil & Gas and renewables industries, and understands Grinding Solutions vision for the future.
‘I’m very excited to join the Grinding Solutions team and look forward to helping to grow its reach and reputation as world experts in mineral processing consultancy and laboratory services. Grinding Solutions prides itself on a consultative and innovative approach, working hand in hand with clients to deliver value. We will continue to focus on delivering high levels of service to existing and new clients alike as we expand our service offering and capabilities.’ James StrongBack to top
Last week Grinding Solutions attended this year’s excellent MEI Conference, Process Mineralogy 17, in Cape Town which saw attendance from 97 delegates from 21 countries. Cornwall was well represented by 10 Camborne School of Mines lecturers, past lectures and graduates, and in all 12 members or affiliates of the Cornish Mining Alliance.
Interesting keynote lectures from Eric Pirard, Steve Williams and Jan Miller discussed the diverse range of applications for process mineralogy, the mine that needs no process mineralogy and the next steps in 3D mineralogy. The keynote lectures gave a good overview of the other papers and covered exploration through to mine waste rehabilitation and the equipment available to perform these tasks. This is a growing and innovative area in the mining industry which is becoming accepted and standard practice for the forward-thinking operators. Process mineralogy is being supported by fast growing developments from the instrument manufacturers enabling for faster and more informative results for the end users. The conference also saw the launch of the 2nd edition of the well renowned text book Process Mineralogy.Back to top
We are pleased to announce that GSL has taken delivery of a new laboratory SMD mill as part of our ongoing expansion. The new mill is installed with 2.2kW VSD motor and can be operated in batch and continuous modes. The mill be used for:
If you are interested in this or an
y other the metallurgical services we offer, please feel free to contact us.
All too often it is possible for a metallurgist to get a good ‘feel’ for a system’s performance by simply looking at a particular stream or product, to the point where very reasonable estimates of grade can be obtained just by judging colour and lustre of a product. A good example of this is the use of ‘vanning’ shovels in the Cornish mining industry, which were successfully used for centuries to estimate copper or tin content.
However, when it comes to quantifying or monitoring these variables continuously, things quickly get very complex. A couple of all-too familiar examples include:
At GSL we are firm believers in image analysis and are proud to offer a range of bespoke image analysis solutions (for example, determining void ratio for the rod charge in our Magotteaux Mill). To cope with the demanding computational processes involved in image analysis, we have installed a powerful workstation which runs on 2 Intel Xeon processors with 6 CPU’s per core, linked with a total of 48Gb of ECC (error-checking) RAM and a 3 terabyte hard-drive. This work station will help carry out a range of simulation work, including:
In most of these cases, image analysis will not be the sole means of obtaining an answer, but it often supplements other analysis. Essentially, it is a single part of a larger puzzle where all too often a fair few pieces are missing. Over the next few weeks, each of these image analysis procedures will be the subject of a more detailed blog post. In the mean time, if you want to discuss what image analysis could do for your project, feel free to get in touch.Back to top