Tag Archives: mineral assaying

Chrysos Corp’s PhotonAssay tech hits major milestone

Chrysos Corp has announced that its ground-breaking PhotonAssay technology has now assayed over one million customer samples.

The milestone comes amid accelerating demand for the technology, which has seen the number of samples analysed more than triple in the last six months, the Australia-based company said.

Driven in part by increasing industry focus on safety, sustainability, and sample turnaround time, Chrysos PhotonAssay is competing with the centuries-old fire assay process in the gold assaying market. Chrysos says the technology, which originated out of a CSIRO project, is fast taking over fire assay to be the preferred technology of miners and laboratories seeking a solution to the supply chain and environmental challenges created by traditional gold assaying methods.

Chrysos CEO, Dirk Treasure, explained, “Demand for PhotonAssay has grown over the last year and further accelerated in the last six months as more miners and laboratories have reached the conclusion, through their own due diligence, that PhotonAssay not just meets and exceeds their accuracy and cost requirements, but also overcomes the speed, safety, and environmental challenges inherent in fire assay.”

Recently, Chrysos and Intertek declared a deal to install two PhotonAssay units at Intertek’s new Minerals Global Centre of Excellence in Perth, Western Australia. Chrysos also announced a partnership with MSALABS, a subsidiary of Capital Ltd, to deploy at least six PhotonAssay units across the globe over an 18-month period. Prior to that, the company signed a deal enabling Kirkland Lake Gold to use PhotonAssay for its Fosterville Mine in Bendigo, Victoria.

Hitting samples with high-energy X-rays, PhotonAssay causes excitation of atomic nuclei allowing enhanced analysis of gold, silver and complementary elements in as little as two minutes, Chrysos claims. Importantly, the non-destructive process allows large samples of up to 500 g to be measured and provides a “true” bulk reading independent of the chemical or physical form of the sample.

“The significance of the technology’s ability to analyse large sample sizes is underlined by Novo Resources’ recent announcement that it has signed a multi-year deal for priority access to the two new PhotonAssay units being installed at Intertek’s Centre of Excellence,” Chrysos said. “In finalising the agreement, Novo signalled its belief that PhotonAssay is the ideal technique for analysing the nuggety gold mineralisation at its Beatons Creek operation in Western Australia.”

Dr James Tickner, Chrysos Corp Co-founder and Chief Technology Officer, agreed: “Accurate assaying for coarse gold has always been a challenge, and it’s on difficult deposits where the much larger sample mass of PhotonAssay really delivers. It’s great to see industry recognising this, with Novo Resources committing to run at least 20,000 samples per month through each unit at Intertek’s brand-new facility in Perth. The two PhotonAssay units we’ve just commissioned there will really help Intertek deliver faster, cleaner and more accurate results, not just for Novo, but its other customers as well.”

Another factor driving fast adoption of the technology is Chrysos’ commercial and operating model whereby the company leases, rather than sells, its PhotonAssay units to customers, the company says. This approach not only minimises expenditure by relieving the customer of capital expenditure charges and any service, delivery and maintenance fees, but also reduces ongoing staffing, training and related occupational health, safety and environmental costs.

In return, the leasing model facilitates a recurring revenue stream for Chrysos, which the company has used for research and development and the overall broadening of applicability and accessibility of PhotonAssay for wet samples and other metals such as silver and copper, it says.

Reviewing recent successes and foreshadowing upcoming events, Treasure summarised, “Even with more than A$80 million ($62 million) in contracted revenue and 14 PhotonAssay units either in-use or committed, we remain focused on executing our smart, sustainable growth plans. Market feedback indicates that our disruptive technology is helping customers achieve faster, safer and cleaner business outcomes ‒ and that is the type of value creation Chrysos finds compelling.

“Ultimately, we want our customers, shareholders and community stakeholders to feel as much pride using and engaging with PhotonAssay, as we do when we create and deliver it across the globe.”

Chrysos PhotonAssay unit delivered to Kirkland Lake’s Fosterville gold mine

Kirkland Lake Gold is to install a Chrysos PhotonAssay unit at its Fosterville mine, in Victoria, Australia, as it looks to simplify, speed up and improve its mineral assaying process.

The agreement with Chrysos has seen the unit delivered to Fosterville, with the installation to be fully operational by early October.

Originally developed at Australia’s national science agency, CSIRO, PhotonAssay delivers faster, more accurate gold analysis, Chrysos says, being a quantitative, chemistry-free replacement for fire assay on-site and in the laboratory.

“Hitting samples with high-energy X-rays, the technology causes excitation of atomic nuclei allowing enhanced analysis of gold, silver, and complementary elements in as little as two minutes,” the company says. “Importantly, Chrysos PhotonAssay allows large samples of up to 500 g to be measured and provides a true bulk reading independent of the chemical or physical form of the sample. The process is completely non-destructive, and all samples can be retained for further testing or analysis if required.”

Wess Edgar, Chief Geologist for Kirkland Lake Gold in Australia, said: “We believe the PhotonAssay method has potential benefits for our business that include simple sample preparation, fast turnaround times for high-quality results, and improved outcomes related to health, environment, and the community.

“The sample charge used in the PhotonAssay method is approximately 10-20 times larger than existing fire assay, and thus has potential for a more representative assay result of the entire crushed sample, which is considered important for samples containing high gold grades and/or visible gold, as are often found at Fosterville.”

Fosterville is one of the highest grade gold mines operating across the industry, having produced 619,000 oz in 2019 at an average grade of 39.6 g/t.

PhotonAssay’s latest market success has drawn a positive response from CSIRO’s Chief Executive, Dr Larry Marshall, according to Chrysos.

“It’s very rewarding to have a global leader like Kirkland Lake embrace this new Aussie technology, which sees our research continuing to improve the efficiency and environmental sustainability of the industry around the world,” Dr Marshall said.

Highlighting the benefits of PhotonAssay for miners, Chrysos CEO, Dirk Treasure, stated: “Our PhotonAssay installations provide single-touch operation and improved safety outcomes, whilst also reducing labour requirements and the potential for human error. The technology’s fast turnaround on high sample volumes provides customers with time-critical operational data and drives optimisation through their entire value chain.

“We are seeing increasing interest in Chrysos PhotonAssay from both laboratories and miners. Recent developments across the sector are driving a desire for technological solutions that deliver measurable productivity gains and true competitive advantage. This is an exciting time, not just for us, but for the entire industry.”

On Site Laboratory Services, a company based in Bendigo, will staff and operate the unit at Fosterville on behalf of Kirkland Lake Gold, Chrysos said.

Swick’s Orexplore mineral scanning tech ready for first mine site trial

In announcing the appointment of John Pizimolas as General Manager of the APAC region for Orexplore, Swick Mining Services has revealed that the first mine site trial of its mineral scanning technology is scheduled for the December quarter.

Since launching in May 2018, 18 different customers have used Orexplore in laboratory trials, according to the company.

Pizimolas, meanwhile, has more than 20 years’ experience as a metallurgical engineer in the resources industry, with senior executive expertise in leading mineral analysis across the full mine project life cycle and in new technology start‐ups, Swick said.

Prior to joining Swick, Pizimolas was Vice President, Minerals South East Asia and Pacific for SGS SA and, before then, General Manager Mine Site Services (Global) for ASX‐listed ALS Limited.

Swick Managing Director, Kent Swick, said Pizimolas’ expert industry knowledge will help drive Orexplore’s growth as it targets revenue generation in its second full year since launch.

Pizimolas said: “I strongly believe in the power of digital core tomographic imaging and the need to progress to more real-time information from drilling than has previously been available. The innovative Orexplore technology certainly delivers real commercial value and I am excited to be leading the business in driving its next phase of growth.”

Swick said the Orexplore business is transitioning towards capturing long term, in‐field digital core tomographic imaging opportunities, with the first mine site trial aimed for the December quarter. To support this field trial, Orexplore has recently taken delivery in Australia of three new specification GeoCore X10 machines (pictured) from its Stockholm facility, capable of imaging 6,000 m/mth of core.

The company said: “Successful completion of this trial is expected to enhance market confidence in the technology and drive revenue growth in Orexplore’s second full year since launch.”

Orexplore was developed over a seven-year period in Sweden and provides real-time, non-destructive assay and tomography results using whole of core data that is an improvement on the multiple weeks delay currently used in destructive chemical testing, according to Swick.

GeoCore X10 core scanning machines use patented attenuation and X-ray fluorescence combined measurement techniques to enhance the identification and understanding of key features within the entire core including:

  • Geochemical composition and mineralogy;
  • 3D structures;
  • Texture, fabric and grain size;
  • Density; and
  • Controls on mineralisation.

The scan results are made available to the client for viewing and analysis through Orexplore’s Insight software. This enables interactive 3D manipulation of the tomography data which can lead to accurate definition of geological structures, the ability to define lithological contacts and the true boundaries of mineralisation. It also provides element concentration data for further analysis.

SGS pairs portable instrumentation and machine learning with FAST

SGS has announced a new service for the metals and mining industry, Field Analytical Services and Testing (FAST), in North America and Australia.

FAST provides real-time data acquisition in the field by pairing portable instrumentation and machine learning, according to the company, which used the backdrop of the annual Prospectors and Developers Association of Canada show, in Toronto, Canada, to make the announcement. “It will bring instrumentation into the field, provide data within 24 to 48 hours and, with the use of machine-learning, enable real-time decision-making capabilities for clients,” the company said.

Part of the solution includes Minalyze AB’s Minalyzer ED-XRF core scanning technology, according to the company.

Russ Calow, Vice President Global Analytical Services, Minerals at SGS in Canada, said: “This service offering will allow our clients to optimise their exploration programmes and production procedures, while making rapid decisions that support quicker speed-to-market.

“SGS is committed to providing analytical procedures that yield meaningful, reliable data – while integrating our in-house, industry leading machine-learning capabilities to give innovative, field based solutions to our clients.”

SGS calls itself the global leader in the geochemical laboratory analytical testing sector with over 160 geochemical laboratories in 45 countries. Its FAST solution reflects a commitment to servicing the mining and smelting industries throughout the entire value chain, leveraging leading technologies, according to the company.

“SGS operates on-site and near-site laboratories in some of the most remote locations in the world, regardless of the climate, the altitude, the logistics or the sample volume,” the company said.

“Whether requirements are at the mine site or in metal smelting and refining plants, SGS has the experience, technical solutions and laboratory professionals to help clients maximize value from their operations and reach their goals efficiently and effectively.”

SGS services to the minerals sector include geochemical analysis, resource calculation, mineralogy, metallurgy, engineering, process design and engineering, process control, water treatment and trade services.

FLSmidth completes laboratory mining solutions line with IMP Automation Group buy

FLSmidth says it has completed its portfolio of automated laboratory solutions for the mining industry with the takeover of IMP Automation Group.

The market for automated laboratories is growing due to a combination of high exploration activity and an increased focus on productivity, automation and digitalisation, according to FLSmidth.

“IMP is the global leader in automated laboratory solutions for the mining industry and has a strong foothold in Australia and South Africa. Its solutions complement the products FLSmidth offers for quality control and optimisation for the mining process,” the company said.

The acquisition includes more than 130 IMP employees, including the Managing Director, Boyne Hohenstein.

Hohenstein said: “In FLSmidth, we have found a partner with the right global sales network to take us to the next level. For years, we have combined profound laboratory process knowledge with automation skills and developed novel and innovative solutions. I am very excited that we now can reach a global audience with our offerings and solutions.”

Manfred Schaffer, President Mining for FLSmidth, said: “Knowing your ore characteristics from the mine and all the way through the processing plant is of increasing importance in mining as declining ore grades make it necessary to increase productivity by process optimisation. We see a strong match between some of our digital initiatives in FLSmidth and IMP’s automation solutions that will help miners get better data on their ore and assist in optimising the processing.”

Included in the transaction is IMP’s 50% share in a joint venture, which provides complete operations and maintenance-based solutions for automated labs.

The acquired parts of IMP Automation Group, including the JV, generated revenues in excess of DKK250 million ($38 million) in 2018, with the acquisition expected to be accretive to FLSmidth Group margins.

The takeover is subject to customary closing conditions and closing is expected in the June quarter.

IMP says it works with like-minded customers to provide innovative robotics and automation solutions from sampling to analysis that improve ergonomics, health and safety for laboratory operators, improve integrity, quality and precision of analytical data and improve efficiencies.

It designs and supplies manual, semi- and fully-automated robotic sample preparation and process control laboratories, turnkey sampling systems and laboratories for mining, metallurgical, cement, non-ferrous industry and steel plants.

Its customers include Anglo American Platinum, Freeport McMoRan, BHP and Rio Tinto

thyssenkrupp brings PhotonAssay technology to Africa mining sector

thyssenkrupp Industrial Solutions South Africa says it has been appointed the official reseller of ground-breaking PhotonAssay™ technology from Chrysos Corp.

The novel X-ray technology is poised to revolutionise the field of gold analysis, replacing traditional methods such as fire-assay in many applications, and providing accurate and fully-automated gold measurements in mineral ores in just a couple of minutes.

The world-first PhotonAssay unit, installed in a commercial Perth, Western Australia laboratory, recently passed two milestones; completing its first 50,000 analyses and receiving ISO 17025 accreditation. The owner of MinAnalytical Laboratory Services will establish a major new analytical facility in early-2019 providing PhotonAssay services in Kalgoorlie, the heart of Australia’s gold mining industry.

MinAnalytical’s General Manager, Gary Wheeler, said: “For our customers, it means the system has been validated and fully tested, and they can rest assured they will receive accurate results which have been benchmarked against fire assay.”

Originally developed by scientists at the CSIRO, Australia’s national research agency, PhotonAssay uses high-power X-rays to activate and measure gold atoms in mineral samples. Compared with conventional X-ray Fluorescence, the much higher energies used in PhotonAssay allow true-bulk measurements of large samples independent of their physical or chemical form, the company said.

Marius Combrinck, thyssenkrupp Product Manager RT Sales and Marketing Minerals, explained how the PhotnAssay technology works: “PhotonAssay hits samples with high-energy X-rays from a linear accelerator. These X-rays force any gold atoms present in the sample into an excited state that lasts for a few seconds. Subsequently, a sensitive detector system measures the gamma-ray signals given off by these atoms as they relax. Processing software relates the gamma-ray signature back to the gold concentration.”

Combrinck pointed out that the gamma-ray energy is different for each element, allowing gold to be accurately distinguished from other metals that may be present.

Samples to be assayed are packaged into standardised plastic jars that are sealed and barcoded, remaining in the jars throughout the analysis process. “As the method is non-destructive, samples are returned unchanged, and can be safely handled, disposed of or sent for further testing as required,” thyssenkrupp said.

The large sample size – typically about 500 g – significantly reduces sample preparation requirements. Recent testing has demonstrated that for most materials, crushing samples to 2-3 mm is enough to enable accurate sampling and analysis. For coarse gold deposits, the 10-fold increase in sample size compared with conventional fire-assay is particularly advantageous, according to the company.

PhotonAssay units are designed for rapid deployment to both centralised and mine site laboratories anywhere in the world. Systems are fully containerised, allowing them to be factory tested and then packaged for shipping and on-site installation.

The modular design of the PhotoAssay unit lends great flexibility. In addition to onsite installations, thyssenkrupp also has the capabilities so run the lab from its Johannesburg head office. “As we are the face of this technology in Africa, we can sell the technology to existing laboratories or directly to a customer,” Combrinck said. He added that thyssenkrupp will provide after-sales service and support to customers and end users on the continent.

The X-ray source used is fully electronic and contains no radioisotopes. PhotonAssay units comply with international safety standards and, due to their high levels of automation, can be operated by staff with minimal training, according to thyssenkrupp. Combrinck added that management of the PhotoAssay unit requires only two staff members, freeing up personnel to attend to other tasks.

The potential for near real-time gold assays is generating strong interest in on-site installations. With a typical detection limit of 0.03 parts per million, a measurement time of two to three minutes and the ability to measure crushed ore, process pulps, concentrates, carbon materials and solutions with equal ability, a mine site PhotonAssay unit can provide rapid information to support resource definition, mine planning and process control, thyssenkrupp said.

A throughput of more than 1,600 samples per day provides enough capacity for even the largest operations, while a significant reduction in skilled labour requirements is an additional benefit for remote sites.

Although developed primarily for gold analysis, the PhotonAssay technology can measure a wide range of other elements. Silver and copper assay services will be added during 2019 and an extension to other metals is planned for this year, thyssenkrupp said.

The company plans to discuss PhotonAssay technology on February 5 and February during its three-day thyssenkrupp Technology Sessions held alongside Mining Indaba 2019.

Qtec, Wallis and UWA granted cash to expand real-time drill and assay technology

The Australian Government Department of Industry, Innovation and Science recently announced that the joint venture (JV) between Qtec, Wallis Drilling and the University of Western Australia has been awarded a three‑year grant from the Cooperative Research Centres Program (CRC-P) up to the value of A$2.8 million ($2 million).

Qteq, as the award recipients with Wallis and UWA as the JV partners, were awarded the grant for development of a real-time communications and downhole power generation system to be used with Qteq’s existing fleet of Measurement While Drilling instruments.

Following the initial phase of the project, the JV will work on developing Logging While Drilling tools that include nuclear magnetic resonance and spectroscopy, Qtec said.

The completed project will deliver the ability to provide real-time assay and moisture content during the reverse circulation drilling process, according to the company.

Qtec Chief Technology Officer, Dr Tim Hopper, said: “The ability to acquire assay and moisture content whilst drilling will dramatically change the face of minerals drilling in Australia. The cost and time reduction to clients is significant, with miners no longer needing to wait months to get cutting samples analysed before they can make decisions.

“When combined with the Wallis Drilling 300RC Autonomous Rig, the industry takes a step closer to achieving the ability to remotely drill and assay holes, with staff being able to monitor and direct operations remotely,” he said. “The mine of the future takes another step forward.”

The Department of Industry, Innovation and Science’s CRC-P aims to improve the competitiveness, productivity and sustainability of Australian industries, especially where Australia has a competitive strength and is in line with government priorities, according to Qtec.

“While the programme wishes to foster high-quality research to solve industry-identified problems through industry‑led and outcome-focused collaborative research partnerships between industry entities and research organisations, it also aims to encourage and facilitate small and medium enterprise participation in collaborative research,” the company added.

With the award of the grant, the Western Australia-based JV will be looking to further promote the use of high-quality, high-technology equipment in the mining industry which it hopes will further encourage WA’s highly skilled workforce to consider a career in this usually “low-tech industry”, Qtec said.

Qteq’s recently appointed Chief Executive Officer, Ewan Meldrum, said: “The development of this new, advanced logging system will support Australia in becoming a world leader in the commercialisation of mining technology and services.”