Tag Archives: Glencore Technology

Telson Mining ready to experiment with metallurgical innovations at Campo Morado

Telson Mining, following a strong quarter of production from the Campo Morado mine, in Guerrero State, Mexico, is making plans to boost throughput and recoveries through the potential use of grinding, leaching and flotation technologies from the likes of Maelgwyn Mineral Services, Core Group and Glencore Technology.

The mine’s throughput averaged out at 58,100 t/mth in the March quarter, with total throughput for the quarter of 174,400 t being 4% higher than the December quarter. Some 11,013 t of zinc concentrate and 1,907 t of lead concentrate was produced over the period, compared with 9,974 t and 1,916 t, respectively, in the previous quarter.

Gold, silver, lead and zinc recoveries all improved, quarter-on-quarter, in the first three months of the year, the company added.

Ralph Shearing, Telson CEO and President, said: “These strong first quarter results continue to reflect our steady progression of improving the throughput and recoveries at Campo Morado. To this end, management intends to initiate a rigorous metallurgical testing program to advance through second phase testing the Leachox™ Process of Maelgwyn Mineral Services and the Albion Process™ of Core Group, both of which returned positive test results in first phase testing.”

He said this metallurgical testing program will also study the ability to increase base metal recoveries at microfine grinding with flotation recovery using Imhoflot Flotation (also Maelgwyn) and Jameson Cell (Glencore Technology) flotation technologies, both designed for such purposes.

“We are confident that additional recovery improvements are available utilising these exciting modern technologies which, if successful, can provide increased revenue streams,” Shearing added.

Maelgwyn’s Leachox Process consists of several Maelgwyn proprietary processes linked together including Imhoflot G-Cell flotation technology, ultra-fine grinding using the Ro-Star mill, Aachen Reactors and Aachen assisted cyanide destruction.

The Albion Process, meanwhile, is a combination of ultrafine grinding and oxidative leaching at atmospheric pressure. The feed to the Albion Process is refractory base or precious metal concentrates, where the sulphides in the feed are oxidised and liberated, allowing the target metals to be recovered by conventional means.

SGS to bring Glencore Technology’s Albion Process testing to Africa mining market

SGS Minerals is to offer Glencore Technology’s Albion Process™ test work to mining companies in Africa after the two extended an agreement and certification related to the hydrometallurgical process.

While SGS already has a relationship with Glencore Technology through SGS Lakefield – through an agreement signed last year – the extension opens up the potential for more large packages of work of “high relevance and value”, Glencore Technology says.

“For Glencore Technology, it extends further the global reach of Albion Process test work as it has grown 300% in the last 12-24 months and is seen as uniquely viable in terms of capital costs, operational costs and project feasibility,” the company said.

The new test work locations will now include Randberg in South Africa, with other locations being discussed elsewhere around the world, according to Glencore Technology.

The Albion Process uses a combination of ultrafine grinding and oxidative leaching at atmospheric pressure to work. It also tolerates a more variable feed and lower grade than other processes, according to Glencore Technology, meaning it can make some projects feasible and profitable where alternative technologies could not. The sulphides in the feed are oxidised and valuable metals liberated, with the economic metals recovered by conventional downstream processing. Test work requires only small sample masses with no pilot plant, Glencore Technology says.

The process has produced high recoveries in refractory gold and in base metal concentrates at the six Albion Process plants in operation across the globe, according to the company.

Glencore Technology’s Paul Voigt said: “The extension to Africa has been under discussion for quite some time. We know the importance of local contact and context. It’s also part of a wider focus we have for the African continent.”

SGS’ Niels Verbaan, said: “This is a natural and highly relevant extension of our work with Glencore Technology on Albion Process test work. We look forward to a larger global footprint to help operations in Africa and the Americas, especially those with complex mineralogies, to get an objective opinion on process options.”

SGS is the third certified provider of test work, joining Core Resources in Australia and TOMS Institute in Russia.

Glencore Tech draws McArthur River parallels at Ozernoye polymetallic project

Glencore Technology says it and Hatch are helping the Ozernoye project in Buryatia, Russia, come up with a process flowsheet suited to the complex composition of ore at the polymetallic asset.
The mining and processing operation would produce zinc and lead concentrates.

Ozernoye’s Grigory Koldunov said the company is currently preparing the area for the Ozernoye polymetallic mine and concentrator in the Yeravninsky region, 60 km away from the Sosnovo-Ozerskoye regional centre.

“We’ll start mining works and stripping waste by November. Expected stripping volume by the end of the year will exceed 350 000 m3 of waste,” Koldunov said. In November, the company will begin the construction of temporary roads and a tailings storage facility.

Glencore Technology’s Adam Price said the ore mineralogy at the site was remarkably similar to Glencore’s McArthur River zinc-lead-silver mine, which originally brought about the need to create the IsaMill ultrafine grinding technology (an example pictured) – an innovation that turns 25 this year.

“Ozernoye’s mineralogy is complex, and it’s going to need the right flowsheet to improve the recovery and concentrate quality and therefore ensure the economic viability of the project,” Price said. The fine-grained lead-zinc ore at the Australia operation made for an obvious benchmark, he said.

This year, Ozernoye has been embarking on mining, capital works and construction of infrastructure facilities. Major construction of the plant’s facilities is planned for 2020-2022 and the company plans to reach design capacity of 8 Mt/y in 2024.

In September, Glencore Technology worked with Hatch, AMC and Ozernoye to finish a geotechnical drilling program, test work and analysis. The camp was recommissioned and the company began clearing the site for construction. Capital mine development and drill and blast works have started to provide contractors with structural materials and to begin stripping, according to Glencore Technology.

“But the main challenge with the Ozernoye deposit is the complex composition of the ore,” Glencore Technology said. “The task of the current geotechnical and test work program is to design and develop the flowsheet.”

Glencore’s McArthur River Mine in northern Australia contains a complex ore that remained uneconomical until the IsaMill was created to produce a steep particle size distribution without needing internal screens or closed circuit cyclones, according to Glencore Technology. The horizontal plug-flow design prevented short circuiting and provided for a reliable and easy to operate technology.

The original 1994 IsaMills are still operating at McArthur River Mine, but the IsaMill technology has been refined to occupy a small footprint, very high availability and significant energy efficiency, Glencore Technology says.

SGS Minerals on board with Glencore Technology’s Albion Process

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.

Heron’s Woodlawn zinc-copper project ramps up as IsaMill arrives

Heron Resources’ Woodlawn zinc-copper project in the New South Wales, Australia, is really starting to take shape, with the company taking delivery of an IsaMill™ (pictured) earlier this week.

The mill is an important part of the company’s processing plant, providing the fine grinding capability to reduce the flotation feed to 30 microns in size. It will treat zinc rich reclaimed tailings, as well as polymetallic primary ore in different processing modes.

The 3 MW 10,000 IsaMill comes with an IsaCharger™ media delivery system, as well as commissioning services from Glencore Technology. It will be the 50th M10,000 installation.

Heron’s Managing Director Wayne Taylor said: “The arrival of the IsaMill marks the step change in technology to be applied to the Woodlawn zinc-copper project. This technology only became available after Woodlawn’s former operations (which stopped in 1998) and it enables Heron to reduce the grind size to provide the most effective mineral liberation, allowing for the highest recoveries to our base metal concentrates.”

The IsaMill is manufactured in Germany and first entered commercial use in 2000.

In the meantime, Heron’s EPC contractor, Sedgman, continues to make good progress with overall construction of the project, reporting the development as 62% complete at the end of June.

The project remains on schedule for the commencement of commissioning in the December quarter.

Woodlawn has an annual steady-state production target of some 40,000 tonnes of zinc concentrate, 10,000 t of copper concentrate and 12,000 t of lead concentrate, along with associated gold and silver.