Tag Archives: mineral processing

SGS Minerals on board with Glencore Technology’s Albion Process

Base metals, Metallurgy, Mineral processing, Mining services, Precious metals, , , , , , , , , , ,

Glencore Technology and SGS Minerals have announced an agreement and certification that has seen SGS’s Lakefield site in Ontario, Canada, become the latest laboratory to be certified to conduct amenability level Albion Process™ testwork.

SGS, one of the world’s leading inspection, verification, testing and certification companies, has become only the third certified provider of Albion Process testwork, joining Core Resources in Australia and TOMS Institute in Russia, Glencore Technology said.

“SGS is a highly trusted provider of laboratory testwork services and becomes a valuable supplier to Glencore Technology, expanding testwork capability throughout the Americas,” the company said. The lab successfully performed Albion Process testwork on a gold/pyrite concentrate and a copper/gold concentrate as part of this qualification.

The Albion Process is emerging as a competitive proposition in hydrometallurgy, using a combination of ultrafine grinding and oxidative leaching at atmospheric pressure to help extract base or precious metals. The process sees the sulphides in base of precious metal concentrate feeds oxidised and valuable metals liberated, with the economic metals recovered by conventional downstream processing, according to Glencore Technology.

The SGS testwork certification is important to both companies because the correct performance of the testwork is key to the successful full-scale implementation of the Albion Process on which performance guarantees are based, Glencore Technology explained.

“While the number of certified laboratories will expand in other key geographic areas, it will be kept to a relatively small number to maintain quality,” the company added.

Glencore Technology’s Mike Hourn, said: “We are delighted to see SGS Lakefield join the family of laboratories with the capability to perform Albion Process amenability testwork. They’re good at what they do and SGS represents a significant presence for us in the Americas and their network is highly valued by Glencore Technology.”

SGS Lakefield’s Niels Verbaan, said: “SGS is pleased to be accredited by Glencore Technology on Albion Process™ Testwork and looks forward to working with its clients to provide an objective opinion on the available process options.”

Independent analysis presented at the Extraction 2018 conference suggested the Albion Process has much lower capital cost than traditional leaching technologies like pressure oxidation (POx) plants (Clary et al, 2018). It also tolerates a more variable feed and lower grade to work where others may not, according to Glencore Technology. “It can therefore make some projects feasible and profitable where alternative technologies were unable to,” the company said, adding that there are six plants in operation globally treating refractory gold and copper concentrates.

The Lakefield site of SGS Minerals is its centre of excellence for metallurgical and mineralogical testing in the Americas, offering both laboratory and pilot plant services.

Flotation and grinding circuit classification rise to the top in CEEC awards

Comminution of minerals, Explosives and blasting, Mineral processing, Mining equipment, Mining industry recognition, Mining services, Sustainable mining, , , , , , ,

The Coalition for Energy Efficient Comminution (CEEC) has announced the recipients of its 2019 CEEC Medals, which are granted annually to authors of outstanding papers presenting “innovative approaches to enhancing energy efficiency in comminution and mineral processing”.

Dr Zeljka Pokrajcic, CEEC Medal Evaluation Committee Chair, announced that the CEEC Medal for Technical Research was awarded to Laureate Professor, Graeme Jameson AO, and Dr Cagri Emer from the Centre for Multiphase Processes, University of Newcastle, New South Wales, Australia, for their publication, ‘Coarse chalcopyrite recovery in a universal froth flotation machine.’

The CEEC Medal for Operations was awarded to Kyle Bartholomew, Rob McIvor and Omar Arafat from Metcom Technologies, Grand Rapids, Minnesota, USA, for their publication, ‘A guide to maximising ball mill circuit classification system efficiency (CSE), for operators and equipment designers.’

Dr Pokrajcic said: “The Evaluation Committee closely considered a number of high quality nominations from leading global industry experts before shortlisting two research papers and three operations papers.”

Jameson and Emer’s (pictured) CEEC Medal winning paper was published in Minerals Engineering (134, 118-133) in January and documents a flotation device, the NovaCell. The NovaCell features a fluidised bed for coarse particle collection and a high shear aeration zone for ultra-fines separation, CEEC said. The researchers’ case study showed the device resulted in a 40% reduction in comminution energy and a 12% reduction in overall site operating cost.

Dr Pokrajcic said the entry was a clear standout in the Technical Research category, presenting high quality research that was well supported by strong technical information and cost analysis.

“The paper presents a new dual-zone flotation device for both coarse and fine particle separation. It reinforces important developments that are supporting industry’s move to coarse particle flotation at scale,” Dr Pokrajcic said.

“This work shows leadership in flotation approaches that can significantly improve comminution efficiency and productivity. It also provides a compelling case for the reduction of operating and capital costs by removing coarse size waste in the comminution circuit.”

The winning Operations Medal paper by Bartholomew, McIvor and Arafat was presented at the 14th AusIMM Mill Operators’ Conference, in Brisbane, in August 2018.

Dr Pokrajcic said the paper provided a “useful methodology for measuring and improving classification efficiency in a grinding circuit”, highlighting the importance of classification in comminution circuits to improve efficiency and productivity.

The paper’s case study measured an almost 25% increase in the generation of new -25 micron material following an increase in ball mill re-circulating load and optimising cyclone performance, according to CEEC.

“The three authors from Metcom Technologies are highly regarded contributors to the field of comminution efficiency, last year publishing (along with Jim Finch) a paper on ball mill classification system optimisation that was Highly Commended by the CEEC Medal judges,” CEEC said.

Dr Pokrajcic said: “This year’s exceptional CEEC Medal winning paper by Bartholomew, McIvor and Arafat provides a succinct, clear, systematic approach to practical operational improvements that not only helps inform operations of the efficiencies that can be achieved, but also demonstrates the economic case for change.”

The 2019 CEEC Medal Evaluation Committee also selected three papers for High Commendation. The recipient in the Technical Research category was Hamid Manouchehri for his paper, ‘How Far the Crushing Performance Can be Pushed? Cone Crusher vs Vertical Shaft Impactor (VSI)’. This paper was presented at Comminution ‘18, in Cape Town, South Africa.

CEEC said: “Manouchehri’s paper presented an adept comparison of the conventional cone crusher and the VSI in a fine crushing duty, and third and fourth stage crushing duty.”

The judges added: “His trials conducted at pilot scale and at laboratory showed the VSI produced more fines, and in some cases product of higher porosity, reducing downstream power consumption.”

In the Operations category, Malcolm Powell, Sarma Kanchibotla, Vladimir Jokovic, Marko Hilden, Benjamin Bonfils, Anand Musunuri, Pamela Moyo, Sam Yu, Jace Young, Paul Yaroshak, Emrah Yalcin and Barun Gorain were awarded High Commendation for their paper, ‘Advanced mine to mill application at the Barrick Cortez Mine.’ This paper was presented at the 14th AusIMM Mill Operators’ Conference.

The CEEC Medal Evaluation judges commented that this was an “outstanding paper” building on the commonly applied mine-to-mill optimisation where grade deportment and dilution, as well as blast movement during high intensity blasting, is considered and evaluated.

Also winning a High Commendation in this category was Berge Simonian for a paper titled, ‘Mount Milligan Mine Performance Update.’ Presented in January at the 51st Annual Canadian Mineral Processors Operators Conference in Alberta, Canada, CEEC said the paper detailed the optimisation and debottlenecking of a relatively new mineral processing circuit.

“Efficiency gains achieved through modification to secondary crushing screening, SAG mill lifter design and ball mill charge optimisation enabled the circuit to operate at throughput beyond design,” the judges said.

CEEC CEO, Alison Keogh, praised the CEEC Medal recipients and Highly Commended authors, saying their outstanding contributions help inspire and foster industry uptake of eco-efficient comminution and processing.

Keogh said: “The CEEC Board thanks the successful authors and each of the nominees for their important research efforts and case studies. These publications, shared widely via CEEC’s global network, provide tangible value by helping operators, researchers and METS companies take steps to operate more efficiently while reducing their energy usage, footprint and costs.”

To view the abstracts and to find out more about the CEEC Medal visit www.ceecthefuture.org/ceec-medal

Multotec ready for the mineral processing test

Comminution of minerals, Equipment maintenance, Mineral exploration, Mineral processing, Mining equipment, Mining services, Water management, , , , , , , , , , , ,

Mineral processing specialist, Multotec used a recent media visit to talk up the testing facilities at the heart of its Technology Division.

The South Africa-based company can carry out a range of testwork with its specialised equipment in Spartan, Gauteng, according to Multotec Technology Manager, Faan Bornman.

“Much of our testwork comes from customers who are in the early stages of project development,” Bornman says.

“They need to understand more about how their minerals or material will separate under given conditions. Often there is not a mathematical model that can predict accurately what they can expect.”

Testwork can reduce project risk significantly, providing a solid foundation for the subsequent design and optimisation of process facilities, Multotec says, with Bornman noting that physical testwork is usually the best way of finding out how particles will behave in a process plant.

The equipment available to Multotec customers includes laboratory-scale wet high-intensity magnetic separators, cyclone rigs, filtration equipment, centrifuges, spiral rigs and a screening research rig. There is even capacity to test water purification methods on mine effluent.

“Extensive test work is especially relevant when a customer is wanting to mine and treat less traditional minerals like lithium or graphite,” Bornman says. “As demand grows for commodities like these, we have had customers bring samples to test how our equipment would perform. In these tests, we trial various methodologies and scientifically record and compare the results.”

The R&D laboratory prepares samples and conducts particle size analysis using equipment such as pressure filters, drying ovens, sieves, shakers, sizers and separating funnels. When chemical analysis is required, samples are sent to outside laboratories.

Bornman said his division also receives enquiries from existing customers when they face challenges: “We research the application of different methodologies to customer material, often leading to the development of a new product or improvements to our existing products,” he said.

“In addition to providing a solution for the customer, we are also able to contribute to the efficiency of the industry as a whole, with an updated and commercialised product.”

Screening

When it comes to tests on mineral screening, a test rig – located at Multotec’s Spartan headquarters – delivers two primary benefits, according to Chris Oldewage, Technology Manager at Multotec Manufacturing. First, it facilitates the in-house development process of screening media products. Second, it allows screening media to be tested against customer requirements to ensure the right solution is delivered.

“The ongoing research and development behind our screening media products give the industry opportunities to optimise efficiencies and recoveries,” Oldewage says. “However, changing anything on a plant brings risk of unexpected downtime. Our screening test rig can considerably reduce operational risks by proving any changes before they are implemented on site.”

In the controlled environment provided by the screening test rig, customers can view the actual performance of screening media products with material from their mining operations, Multotec says, with the company’s testing protocols generating the data necessary for detailed process analysis. This facilitates well-informed subsequent decisions, the company said.

The screening rig is made up of three test platforms: a vibrating screen, a sieve bend and a static drain screen platform. The vibrating screen can conduct classification tests, wet and dry dewatering tests, product development tests and plant screen simulations. The static drain screen and sieve bend screening test platforms are wet classification, drainage and dewatering tests.

Multotec Process Engineer, PJ Pieters, said accurate scaling of a customer’s on-mine process is vital for achieving representative and relevant test results.

“We gather a range of key data from customers on our test work questionnaire,” Pieters said. “This includes their material tonnages, volumes of water, screen sizes in operation and aperture sizes on panels among other information.”

This ensures sample sizes are representative and the tests accurately reflect what is taking place in the mine’s processes. Tests, meanwhile, are conducted in triplicate runs to ensure a sound scientific basis for the findings.

Oldewage said: “By removing the risk that mines face in trying new solutions, our testing capability smooths the way for valuable innovation to improve screening performance.”

The screening test facility at Multotec also includes a small Lucotec screen and a small wedgewire trommel screen, both for small-scale verification test work.

Cyclones

Multotec’s large scale cyclone rig, meanwhile, can test the performance of a range of cyclone sizes, up to 450 mm diameter. Tests related to classification, desliming and dewatering, as well as dense medium separation using density tracers, can be conducted.

Among the benefits to customers is the ability to test large volumes of samples, as the rig includes a 1,750 litre sump and a 6/4 pump, Multotec said. Flexibility is provided by a variable speed drive connected to the pump, to vary the flow rates as required by the cyclone size.

Dry samples usually need to be blended before testing, and wet samples may need to be dried before blending. The resulting samples from the test must also be scientifically prepared for particle size and chemical analysis. The precision at each stage is vital, as bulk samples as large as 200 kg may need to be reduced to as little as 100 g.

The rig’s infrastructure also includes two Multotec vezin samplers, which are compliant with the highest design standards to provide reliable samples, according to Multotec. “These help to minimise the common errors of manual sampling and ensure that the integrity of the sample is retained,” the company says.

In addition to using the test rig to analyses the customer’s process flowsheet – with Multotec engineers identifying where its range of classification and other products can add value – the company also uses the cyclone test rig for its own product development.

“This on-going process has resulted in a range of cyclones that are lighter, more cost effective, environmentally-friendly and energy efficient,” the company said. “They all contribute to helping customers lower their cost per tonne in a low footprint, sustainable plant operation.”

Spirals

Multotec says its spiral test rig has been adapted in response to the industry’s need to re-treat chrome dumps and upgrade ultra-fine chrome.

Again, located at the company’s headquarters in Spartan, the rig allows eight to 10 different spirals to be erected at a time.

Jeantelle Rust, R&D Engineer at Multotec Process Equipment, said: “With the drive to process tailings in the chrome sector, we have been running tests on a more compressed spiral with a reduced pitch. This reduces the velocity of the very fine particles.”

This configuration works particularly well when dealing with fine material, hence its application in tailings, Rust said. The spiral could offer a cost-efficient way of separating ultra-fine chrome material and recovering valuable product, according to the company.

Rust said: “Such a solution presents an attractive commercial proposition to industry and will also address environmental concerns presented by tailings dumps.”

Using a “mouth-organ product box”, the material being tested on the spiral rig is split into eight product fractions, not just the usual three for product, middlings and tailings. This helps optimise the mass balance for reporting purposes, according to the company.

The spiral test rig has also been used to evolve designs that deal with coarser material, Multotec said. “Customers were looking for a solution to the ‘beaching’ of coarse coal product on the spiral’s surface, for instance,” it explained.

Rust said: “We were able to modify the angles and diameter of the trough to address this challenge. Our ability to make small adjustments to the equipment, and to test material repeatedly at full scale, is the key to finding practical solutions.”

Multotec has also conducted research for producers of mineral sands where head grades were steadily dropping. This necessitated the treatment of larger tonnages, requiring higher capacity spirals.

“Space constraints on the customer’s site meant that adding spirals to their process was not an option,” Rust said.

“Wider spirals were thus tested for higher throughput, with different angles to minimise losses.”

 

Metso and Outotec to join together in ‘industry-shaping combination’

Bulk handling, Comminution of minerals, Equipment maintenance, IoT, Mineral processing, Mining equipment, Mining finance, Mining mergers and acquisitions, Mining services, Mining software, Sustainable mining, Water management, , , , , , , , , , , ,

The boards of Metso and Outotec have unanimously approved a demerger plan and a combination agreement to combine Metso’s Minerals business with Outotec.

As part of the deal, Metso Flow Control, which was recently split off from the Metso Minerals division, will become a pure-play listed entity under the name of Neles.

The combination of Metso Minerals and Outotec is highly complementary and will create a unique company in the industry, according to the two companies. “Metso Outotec will leverage the strengths of both companies, including technology and R&D, product and process excellence, scale and global service offering footprint. The combination will deliver significant benefits to all stakeholders,” they said.

The combined company, Metso Outotec Corp, had illustrative 2018 combined sales and adjusted EBITA of €3.9 billion ($4.4 billion) and €369 million (excluding the impact of the €110 million provision recorded in relation to the ilmenite smelter project as described in Outotec’s 2018 financial statements).

This represents an illustrative combined adjusted EBITA margin of 9.6% in 2018, excluding the benefit of the expected synergies, and also Metso’s recently announced acquisition of McCloskey International. Including McCloskey, illustrative 2018 combined sales would have been approximately €4.2 billion.

Metso Minerals and Outotec expect to achieve run-rate annual pre-tax cost synergies of at least €100 million, and run-rate annual revenue synergies of at least €150 million, delivering significant value for shareholders, they said.

Upon completion of the agreed demerger, Metso shareholders will receive 4.3 newly-issued shares in Outotec for each share owned in Metso on the record date. This implies Metso shareholders would own around 78% of the shares and votes of Metso Outotec, and Outotec shareholders would own the remaining 22% of the shares and votes of Metso Outotec. In addition, Metso shareholders will retain their current shares in Metso, which will be renamed Neles.

The current CEO of Metso, Pekka Vauramo, will become Metso Outotec’s CEO, and the current CEO of Outotec, Markku Teräsvasara, will become the Deputy CEO of Metso Outotec. Eeva Sipilä will become the CFO and Deputy CEO of Metso Outotec.

The board of Metso Outotec will include board members from both companies. It is proposed that Metso Outotec’s Chairman will be Mikael Lilius and that the Vice Chairman will be Matti Alahuhta.

Shareholders representing 33.6% of the shares and votes of Metso and shareholders representing 24.8% of the shares and votes of Outotec have irrevocably undertaken to vote in favour of the transaction, which the companies hope will close in the June quarter of 2020.

Metso Outotec’s headquarters will be in Helsinki, Finland and it will maintain its listing on Nasdaq Helsinki, the companies said.

Outotec Chairman, Matti Alahuhta, called the deal an “industry-shaping combination” that joins two “uniquely complementary companies”, while Metso Chairman, Mikael Lilius, said the deal represented a “transformational combination of two great companies” and the simultaneous creation of an “independent leader in flow control”.

Outotec CEO, Markku Teräsvasara, said: “The combination of Outotec and Metso marks an important milestone in each company’s history and in Outotec’s strategic development. I am excited about the many benefits that the combination will deliver for customers, employees and ultimately shareholders, with the larger scale and combined strengths of both companies. Outotec has a highly compelling portfolio of technologies and capabilities that will be a key catalyst for unlocking many of these benefits. I look forward to building a great new company together with the Outotec and Metso Minerals employees, as part of Metso Outotec.”

And, Metso CEO, Pekka Vauramo, said: “This is a unique opportunity to create value for our customers, employees and partners globally. Metso Outotec will have capabilities that will enable us to drive sustainable growth, while providing our customers with high-quality technology, equipment and services that will ultimately improve their businesses. We will have an extensive global presence, complementary offering, strong services and a large installed base. We also have excellent people – the best talent in the industry. I am therefore eagerly waiting to join with Outotec’s personnel to begin our exciting journey together.”

The combination of the two companies is, according to Metso and Outotec, expected to deliver a range of strategic, commercial, operational and financial benefits:

  • A leading company with a wide presence across the value chain allowing Metso Outotec to provide an end-to-end offering in minerals processing;
  • Enlarged installed base coupled with advanced service offering providing opportunities to unlock significant benefits;
  • Leadership in sustainable technology across all businesses;
  • Breadth across verticals (minerals/metals/aggregates), geography and application provide enhanced performance;
  • Significant revenue and cost synergies, and;
  • Solid capital structure and attractive dividend policy.

The companies said: “The combination of Metso Minerals and Outotec will create a leading company in process technology, equipment and services serving the minerals, metals and aggregates industries. Metso Outotec will also have expertise in specialist areas, such as recycling and energy solutions.”

Metso Outotec will have a presence across the full minerals processing and metals refining value chain, with a “differentiated ability to deliver end-to-end solutions across the whole process from crushing to end products”, they said. The combined company will own a broad portfolio of leading technologies in, for example, comminution, beneficiation and metals refining, as well as a market leading aggregates business and global strength in services.

On a combined basis, Metso Minerals and Outotec had 15,630 employees globally, as of March 31, 2019, with close to 100 nationalities represented.

Completion of the transaction is subject to approval by a majority of two-thirds of votes cast and shares represented at the respective EGMs of Metso and Outotec, regulatory approvals, including competition clearances, and other conditions.

As a result of the combination of Metso Minerals and Outotec, Metso will be renamed as Neles and will become a globally recognised flow control company with highly attractive market positions.

Neles, which will continue to be listed on Nasdaq Helsinki, is expected to create additional value for Metso’s shareholders as a separate entity through:

  • Leading position as a flow control solution provider with market leadership across pulp & paper valves and down stream oil & gas control valves;
  • Continued outperformance of market growth with best-in-class profitability and proven resilience through the cycle;
  • Diversified sales mix both by region and industry;
  • A fully focused, dedicated management to deliver shareholder value and leverage further growth opportunities;
  • Solid balance sheet and financial position, and;
  • Crystallisation of attractive sector trading multiples.

At year-end 2018, Neles had illustrative combined net cash of €72 million. To support the capital structure of Neles, Metso has entered into a €150 million term loan facility agreement, which may be used for the repayment and replacement of Metso’s credit facilities and other liabilities that benefit the flow control business and are to remain with Neles post completion. Prior to the completion, Metso is also expected to enter into a new revolving credit facility of €200 million to be used for the general corporate purposes of Neles.

Olli Isotalo, who was named the new CEO of the Flow Control division last month, will become Neles’ CEO.

FLSmidth takes nextSTEP in flotation technology at South Africa platinum mine

Metallurgy, Mineral processing, Mining equipment, Mining techniques, Precious metals, , , , , , , , ,

FLSmidth’s innovative nextSTEP™ rotor and stator flotation technology has proven itself at a large platinum mine in South Africa, the mineral processing company says.

According to Ricus van Reenen, Regional Product Line Manager – Separation at FLSmidth, the nextSTEP rotor and stator combination has been at work for over a year at the mine, achieving positive results.

“The customer has achieved significantly lower power consumption on the full-scale retrofits we installed early in 2018,” van Reenen says. “The more efficient design allows the same or higher slurry circulation at reduced rotor speed, leading to lower power draw.”

The retrofits have been applied to both primary and secondary flotation applications, where energy savings of over 10% have been achieved, according to FLSmidth.

Years of research and development have been invested in the nextSTEP technology, which was originally launched in 2015, the company says. Among the key design elements are the addition of slots to the stator, adjustments in the rotor profile and a parallel distance between the rotor and stator.

“Energy dissipation is now more uniform than in traditional forced-air designs,” van Reenen says. “This means a more even wear pattern across the rotor and stator, and therefore longer intervals between maintenance.”

In the South Africa installations, the wear on the rotors and stators has been minimal after more than a year’s operation, the company says. In one flotation cell, the equipment has been operational for 15 months. The thickness of the rotor has reduced from 65 mm to only 60 mm, and the stator from 75 mm to 70 mm. After 13 months of operation in the second installation, the wear is even less, with the rotor’s thickness having reduced from 65 mm to 63 mm and the stator going from 75 mm to 73 mm.

van Reenen highlighted that there have been other benefits experienced by South Africa users of the new technology. Among these has been 16-18% less blower air usage, with more concentrated bubble formation.

“Better turbulence energy dissipation around the rotor and stator region, with its related finer bubble size distribution, creates more surface area for bubble-particle attachment,” van Reenen says. “This has delivered more froth and a higher mass pull on our local units.”

The success of the nextSTEP technology has led to further retrofits being planned in South Africa, in line with FLSmidth’s drive to promote mines’ productivity and performance. Van Reenen says the intensive R&D process continues apace and is not just in the rotor and stator design but also includes areas such as smart control systems and continued digitalisation of process solutions.

First Reserve becomes new owner of Weir’s Flow Control division

Mineral processing, Mining mergers and acquisitions, Water management, , , , , ,

The Weir Group says it has completed the sale of its Flow Control division to First Reserve for an enterprise value of £275 million ($343 million).

The deal, which was first announced on February 25, completed on June 28, the company confirmed.

The Flow Control division primarily provides highly engineered pumps, valves and other solutions used in power, industrial and downstream oil and gas applications, according to Weir.

Back in February, the company said the sale would effectively strengthen its mining and oil & gas ties: “Once this transaction completes, on a pro forma basis, more than 80% of Weir’s revenues will be from attractive aftermarket-intensive mining and upstream oil and gas markets.”

Weir Group CEO, Jon Stanton, said: “The sale of the Flow Control division marks an important step in successfully delivering our strategy. It means Weir is now a more focused business with strong positions in premium upstream mining and oil and gas markets around the world.”

The £275 million enterprise value price is subject to customary working capital and debt-like adjustments, Weir clarified.

Metso splits Flow Control and Minerals business

Equipment maintenance, Mineral processing, Mining consumables, Mining equipment, Mining people, Mining services, Water management, , , , ,

Metso says it has decided to develop the businesses of the Minerals and Flow Control segments separately, with the latter business area appointing Olli Isotalo as President.

Metso’s Board of Directors said it had defined its view on the company’s portfolio strategy and decided that the businesses under the Minerals and Flow Control segments will be further developed separately from each other, the company said.

”All Metso’s businesses and the two segments that are composed of these, have attractive growth opportunities in the coming years,” Metso’s President and CEO, Pekka Vauramo, said. “Capitalising on these opportunities will call for efficient decision-making and allocation of resources.

“However, our businesses have significant differences relating to, for example, customers, cyclicality, growth drivers, sales channels and product development. This is why we made the decision to develop Minerals and Flow Control strategies separately from each other.

“In addition, Minerals and Flow Control share a limited amount of synergies, the majority of which are administrative, thus the separation will make the preparation and implementation of their respective strategies more efficient.”

The Minerals segment includes equipment and services sold to mining and aggregates customers, as well as the recycling business. The Flow Control segment consists of valves and related services sold to various process industries.

The new President of the Valves business area, Olli Isotalo, will come on board on July 15, Metso said. He will also become a member of the Metso Executive Team.

Isatalo has previously served as CEO of Patria Oyj and has held various executive positions at Cargotec Corp, Metso said.

Vauramo said: “I am very pleased that we can utilise Olli Isotalo’s expertise and experience in preparing and further implementing the strategy of the Valves business.”

Isatalo said: “I am excited to join the Valves business area, which has consistently reported good results and has seen overall strong development over the past years. I eagerly look forward to developing a new strategy and creating new growth opportunities for Valves together with its skilled and motivated personnel.”

John Quinlivan, the current President of the Valves business area, will continue as Senior Adviser until the end of 2019 and will support Olli Isotalo during the transition period, Metso said.

Ivanhoe’s Kakula copper mine takes shape in the DRC

Base metals, Comminution of minerals, Mineral processing, Mineral project development, Mining equipment, Mining safety, Mining services, Power supply for mines, , , , , , , , , ,

Development is speeding up at Ivanhoe Mines’ majority-owned Kamoa-Kakula copper project in the Democratic Republic of Congo, with the first access drives approaching Kakula’s initial high-grade ore and earthworks for the surface processing plant having now commenced, the Toronto listed company says.

Mining OEMs will be getting excited too, with tenders for long-lead mining and processing equipment now issued and orders expected to be placed shortly, Ivanhoe said.

In February, Ivanhoe unveiled a prefeasibility study for a 6 Mt/y mine at Kakula, which envisaged an average annual production rate of 291,000 t of copper at a mine-site cash cost of $0.46/Ib ($1,014/t) of copper and total cash cost of $1.11/lb copper for the first 10 years of operations. Annual copper production would step up to 360,000 t by year four, the company said. This came with an initial capital cost of $1.1 billion and would result in an after-tax net present value (8% discount) of $5.4 billion factoring in an average copper price of $3.10/lb. In addition to this, the company unveiled an updated preliminary economic assessment combining both Kakula and Kamoa into an 18 Mt/y operation.

Shortly after this, various stakeholders advanced money for the project, getting Ivanhoe, as the operator, and Zijn Mining, as a partner, to the point where they were both able to fully fund their share of capital costs required to bring the mine into commercial production.

In the latest update on the project, Ivanhoe said “excellent progress” was being made on the construction of the 6 Mt/y Kakula copper mine. Initial copper concentrate production from the Kakula mine currently is scheduled for the September quarter of 2021, with the initial, five-year, detailed mine design now finalised and production scheduling in progress.

The full, detailed mine design will be included in the independent definitive feasibility study that is expected to be published early next year.

Approximately 2,500 employees and contractors now are working at the project as Ivanhoe advances construction of the project’s initial mine at the Kakula deposit.

A total of 647 m of underground development was completed last month, some 100 m more than achieved in April. Lower-grade development ore is being stockpiled on surface near the site of the concentrator plant, which will be used for plant commissioning.

“Mine access drives 1 and 2 (interconnected, parallel tunnels that will provide access to ore zones) are approximately 200 m from Kakula’s initial high-grade mining area, and these priority drives are expected to intersect the higher-grade ore in late July or early August this year,” Ivanhoe said.

The underground development work at Kakula is being performed by mining crews operating large-capacity, semi-autonomous mining equipment, such as jumbo drilling rigs and 50-t trucks (shown above).

The Kakula mine access is via twin declines on the northern side (which have been completed) and a single decline on the south side of the deposit (under development). One of the northern declines will be the mine’s primary access way, while the other will be for the ore conveyor haulage system. The southern ventilation decline will serve as a secondary access and will facilitate the acceleration of critical, early mine development.

From the bottom of the northern and southern declines, a pair of perimeter drifts will be driven to the east and west extremities of the deposit and will serve as the primary accesses to the production areas. These drifts also will be used as the primary intake and exhaust ventilation circuits and will connect with the intake and exhaust ventilation shafts. Underground access to the first raise bore ventilation shaft has been reached, Ivanhoe said. The pilot hole for the 177-m raise bore has been completed, and reaming of the 5.5-m diameter ventilation shaft is expected to be completed next month, according to the company.

The primary ore handling system will include perimeter conveyor drifts and load-out points along the north side of the deposit. The perimeter conveyor drifts will terminate at the main conveyor decline. Connection drifts between the north and south perimeter drifts will provide access and ventilation to the planned mining areas.

Around 99% of the deposit will be mined using the drift-and-fill method, which was chosen to maximise the overall extraction of Kakula ore, Ivanhoe said.

The tailings will flow through a series of cyclones at the backfill plant, and approximately 55% of the tailings will be sent back underground into the mined-out workings as paste backfill. The remaining 45% of the tailings will be pumped to a small tailings storage facility that is being designed by a team of international engineers to meet global best practices for safety, Ivanhoe said.

“The detailed design for the truck-tipping area, where underground ore will feed onto the conveyor system for transportation to surface, and the conveyor system for the main declines, has been completed and component manufacture is underway,” the company added.

Three underground mining crews are working at Kakula. Once Ventilation Shaft 1 is completed and fans have been installed, an additional three crews will be mobilised to accelerate mine development, which is scheduled for October 2019.

Development of an additional access and ventilation decline on the southern side of the Kakula orebody is progressing well and has advanced more than 200 m, Ivanhoe noted. A surface piling rig machine has been mobilised to prepare for the raise bore civil construction for Ventilation Shaft 2.

The DRA Global detailed engineering work on the project includes the engineering and design associated with all underground mining infrastructure, the concentrator plant and all supporting surface infrastructure. This engineering work is running in parallel with an independent definitive feasibility study that is expected to be completed early next year.

“An agreed, detailed budget, and construction and implementation plan is being finalised with Ivanhoe’s joint-venture partner Zijin Mining,” Ivanhoe said. “The project also will be further optimised and adjusted based on the development progress of the project and on the results of the definitive feasibility study.”

On May 22, the project’s construction team commenced breaking ground for the surface processing plant, marking the start of the concentrator construction. The Kakula concentrator will be constructed in a phased approach with two 3 Mt/y modules, as the mining operations ramp up to a full ore-throughput rate of 6 Mt/y. Kakula is expected to produce a very-high-grade copper concentrate in excess of 55% copper, with extremely low arsenic levels, according to Ivanhoe.

The processing plant flow diagrams, process control descriptions, and processing equipment lists have been completed and piping and instrumentation diagrams are being finalised, the company noted. “Tenders for long-lead items such as cone crushers, ball mills, thickeners, high-pressure grinding rolls, flotation cells, regrind mills, concentrate filter and low entrainment flotation cells, have been issued to the market and bids have been received. The Kamoa-Kakula project team in conjunction with DRA is in the process of adjudicating the tenders. Orders are expected to be placed shortly.”

In addition, the tender for the plant civil works has been issued. All bids have been received and are under adjudication. Tenders for smaller equipment for the processing plant such as agitators and samplers have been issued to the market.

Earlier this month, the Kamoa-Kakula project achieved a total of more than 14.5 million work hours free of lost-time injuries – it has been approximately seven years since the last lost-time injury occurred at the project. “This outstanding achievement reflects the dedication to a safety-focused culture of the entire Kamoa-Kakula exploration and development teams,” Ivanhoe said.

Ivanhoe also provided an update on the upgrading work at the Mwadingusha hydropower plant, which it said was progressing well. This project is important to the Kamoa-Kakula project as it is providing clean hydro-electricity to the site from the national grid.

“Construction activities at the Mwadingusha hydropower station are progressing well and Ivanhoe expects that the full upgrading and modernisation of the hydropower plant and its six generators to be completed in late 2020,” Ivanhoe said. “This upgrading work is pursuant to an agreement with the DRC’s state-owned power company, La Société Nationale d’Electricité (SNEL), and is in exchange for a guaranteed 100 MW of electricity – more than enough power for the Kakula mine. The Kamoa-Kakula project has been receiving hydroelectric-generated power from the national grid since late 2016.”

“This installation of modern power generating equipment at Mwadingusha is an important step in helping to secure long-term, sustainable and clean electricity for the Congolese people and for the development of the Kakula mine.”

The upgrading work at Mwadingusha is being conducted by engineering firm Stucky of Lausanne, Switzerland, under the direction of Ivanhoe and Zijin Mining, in conjunction with SNEL.

Work is underway on a 220-kV electrical substation at the Kakula mine that will allow the mine and processing plant to be fully powered from the national power grid. Two new Sumec generators also have been installed at Kakula to provide power to the mine in the event of any power interruptions in the national grid.

Two Crush It! Challenge finalists being guided by Glencore XPS team

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Glencore’s XPS (Expert Process Solutions) is playing a role in Natural Resources Canada’s Crush It! Challenge by volunteering consulting services to two applicants recently named finalists in the competition.

XPS has much technical and operational expertise in the area of comminution and has been willing to impart its wisdom on the two teams.

The Crush It! Challenge was announced in October 2018 with the aim to realise an innovative breakthrough in the mining industry’s most energy-intensive and inefficient processes: crushing and grinding.

The primary objectives of the challenge are to fight climate change by creating innovative technologies that reduce energy consumption and pollution, increase competitiveness by developing world-leading clean technologies, and transform the mining cycle to establish a new “future in mining”.

Semi-finalists (up to 12) receive C$10,000 ($7,402) to help them pitch their ideas to the Challenge Jury, with up to six finalists being granted up to C$800,000 to build and test their clean technologies. The winner and innovator demonstrating the most superior energy breakthrough to crush and grind rocks is awarded a C$5 million prize to fully develop and roll out their solution.

On April 30, Natural Resources Canada announced the six finalists, which including two submissions that received consulting services from Glencore’s XPS.

Gillian Holcroft from the Canada Mining Innovation Council is representing a team in the finals for her Conjugate Anvil Hammer Mill (CAHM). “CAHM is a platform technology that has the potential to reduce energy consumption by 50% and replace several types of mills,” Glencore said. “Improved sustainability and lower costs could transform non-viable mineral development projects into new mines in Canada.”

Erin Bobicki of the University of Toronto is the project leader representing another finalist for her Microwave Pre-treatment and Ore Sorting technology. “This innovation combines microwave-assisted comminution and sorting to achieve energy savings of up to 70%,” Glencore said.

“A benefit of this innovation is that it is a scalable technology that can be easily integrated as a technology add-on for existing operations, therefore, it requires a small footprint as no additional infrastructure or utilities are required to support it. Given the sizeable energy savings, the innovation has the potential to transform non-viable mining projects into new mines.”

Now that the finalists have been announced, they are readying technical reports to showcase their clean-tech solutions submissions by the November 30, 2020, deadline. In March 2021, the final grand prize winner will be announced.

GoGold signs up BQE Water for SART plant at Parral tailings operation

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BQE Water says it has been retained by GoGold Resources for the implementation of a sulphidisation, acidification, recycling and thickening (SART) plant at the Parral operation in Chihuahua, Mexico.

The contract comes after on-site testing and preliminary assessment of SART integration into the metallurgical process at Parral that were completed earlier by BQE Water.

Under the contract, BQE Water’s scope of work will include plant engineering design, process automation, engineering support during procurement and construction, plant commissioning, and ongoing operations support after plant start-up. The plant construction is expected to be completed by the end of the year. Once the plant is commissioned, BQE Water will provide operations support services for a monthly fee for a period of three years, it said.

Owned and operated by GoGold Resources, the Parral project involves the reprocessing of old tailings to recover silver and gold by conventional cyanidation. In addition to the precious metals, the tailings also contain significant quantities of cyanide soluble copper and zinc. These base metals compete for cyanide, causing high cyanide consumption and increasing operating costs, according to BQE.

Anis Nehme, COO of GoGold Resources, said: “We have been working with BQE Water for the past few years to evaluate SART integration into the Parral project and we are relying on their expertise to help us maximise the positive contribution SART can bring to the project’s overall performance.”

David Kratochvil, President & CEO of BQE Water, said: “This contract is further proof of our leadership in the safe, cost-effective and rapid deployment of SART to help precious metals producers improve the metallurgical and environmental performance of their projects.

“We stand behind our proven process designs perfected over multiple large projects completed in the past decade and in our operations support capabilities to ensure SART benefits are maximised while operational risks are minimised.”

The SART process recovers copper from cyanide leach solution while allowing free cyanide to be recycled back to the leaching of precious metals. This lowers the cost of gold extraction and reduces the environmental footprint of gold mining projects, BQE says.

“SART can be a game changer that favourably shifts project economics and enables projects to move forward,” BQE said, adding that fewer than 10 industrial scale SART plants have been built and operated globally.