Tag Archives: Sukari

Centamin looks for partial diesel displacement with Cat DGB LNG trial

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Centamin is to trial Caterpillar’s Dynamic Gas Blending (DGB) technology at its Sukari gold mine in Egypt as part of a plan to reduce greenhouse gas emissions and lower costs.

The mine will trial the technology on three or four its haul trucks next year, Centamin CEO, Martin Horgan, told attendees at its capital markets webcast today.

The DGB conversion kits, available on Cat 785C and 793D haul trucks, are a dual-fuel technology that enables miners to substitute diesel fuel with LNG, according to Cat. The use of LNG has been proven to reduce emissions by up to 30%, as well as lower costs by up to 30%, Cat says.

Just last week, Gold Fields’ CEO Nick Holland told a panel at IMARC Online that the company would trial DGB technology on four of its haul trucks at its Tarkwa gold mine in Ghana.

While the use of DGB technology will partially displace Centamin’s use of diesel fuel with LNG, the company said it was also working on “full displacement” with LNG as part of its efforts to reduce greenhouse gas emissions.

The company has already committed to delivering a Stage 1 30 MW solar plant at Sukari, expected to replace 18–20 million litres of diesel consumption per year through operation during daylight hours.

In other areas of technology development, Centamin said it would soon be adding new Cat 6040 hydraulic face shovels to its existing fleet at Sukari, it had four “lightweight truck trays” currently operating at the mine, and it was trialling Metso Outotec Poly-Met mill liners on ball mills in its processing plant.

Capital to take on open-pit waste mining at Centamin’s Sukari gold mine

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Capital Limited has entered a conditional open-pit waste mining services contract with Sukari Gold Mines and has also expanded and extended its existing drilling contract with Sukari.

Sukari is the operating company for the Sukari gold mine, in Egypt, one of the largest gold mines in Africa and the principal asset of Centamin.

Collectively, the contracts are anticipated to deliver incremental revenues of $235-260 million over a four-year period, commencing January 1, 2021, representing the largest award of new business in the company’s history.

The 120 Mt open-pit waste mining contract at Sukari will see Capital provide load and haul and ancillary services over a period of four years. At the same time, the existing drilling contract at Sukari has been extended to December 31, 2024 (from September 30, 2023) and expanded by nine additional blasthole rigs, bringing the rigs operating at Sukari to 24 in total.

To date, Capital has spent $23.4 million towards equipment and has made strong progress with early works, key personnel hiring and advanced operational planning, it said. It has also signed an OEM facility with Sandvik for $8.5 million and an OEM facility with Epiroc is awaiting final credit approval with documentation in near final form.

Jamie Boyton, Executive Chairman, said: “The winning of the tender for the Sukari open-pit waste mining contract is a significant milestone for Capital – it is the largest contract win for the group since inception, adds substantial scale to our mining services division, as well as providing revenue diversification from our drilling services business.

“We are also pleased to have increased the scope and scale of our existing drilling contract. Having operated at the Sukari mine since 2005, which started commercial gold production over a decade ago, Capital is pleased to be deepening further its strong client relationship with Centamin in assisting with the generation of significant value to Centamin over the medium and longer term as the Sukari mine enters its next phase of gold production.”

Martin Horgan, CEO of Centamin, said: “With the focus on improving operational flexibility at Sukari, introducing contract mining over the next few years for waste stripping in the open pit is cost and time effective. Following a rigorous tender process, Capital was determined to be the best suited to deliver what is needed.

“Capital is a trusted contractor to the company, with a strong understanding of Sukari and the operating environment, including the employment of local workforce and established training programs, consistent with Centamin’s approach to local workforce development.”

As part of this increased open-pit waste stripping program, Centamin continues to use its existing owner operator fleet, which has capacity of 80-90 Mt/y total material moved (ore and waste). The company said it conducted an independent contract mining tender process to assess incremental contract waste stripping costs, and capacity, against the cost to expand the current owner-operator mining fleet.

Centamin added: “It was concluded that the optimal integration of contract mining was to isolate the waste stripping workstream on the East wall of the open pit, thereby limiting the day-to-day interaction with the operations and simplifying operational oversight and planning from a health, safety and logistical standpoint. The East wall waste stripping program will move material to a dedicated waste dump.”

Centamin sets up Sukari for a solar power-fuelled future

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Among new projects featured in Centamin’s just-released 2019 sustainability report is the development of a solar power installation that could pump 30 MW AC of renewable energy into the mix at its Sukari gold operation in Egypt.

The Stage 1 30 MW solar plant is expected to replace 18–20 million litres of diesel consumption per year through operation during daylight hours, according to Ross Jerrard, Chief Financial Officer and Executive Director.

The bulk of Centamin’s greenhouse gas emissions result from the on-site power generation at Sukari, the company said in the report, with the site powered entirely by heavy fuel oil burning generators consuming over 90–100 million litres of diesel to meet the mine’s electricity needs. MAK and Wartsilla diesel-fired generators, with a combined power of 68 MW, are on site, according to the company.

In 2019, Centamin completed a preliminary study assessing the technical viability of integrating a solar plant at the Sukari mine. The results of the study demonstrated the potential of the project to materially reduce the consumption of fossil fuels and thereby reducing the company’s environmental footprint and operating expenditure, it said.

The study indicated a minimum of 36 MW DC/30 MW AC peak power hybrid solar plant would be the optimal capacity for an initial staged integration to the processing plant. A limited amount of battery storage (7.5 MW) is required to manage start up and shut down surges for integration into the existing site distribution and control systems, with the solar farm scoped over an 85 ha site on the Sukari tenement.

The project will be developed in two phases:

  • Phase one will require the upgrade of Sukari’s high voltage distribution system to prepare the system for connection of large scale solar; and
  • Phase two will be the construction, installation and connection of the solar photo voltaic plant to the Sukari electrical distribution system.

Centamin estimates up to 25% of Sukari’s power needs could be met through solar generation, with the initial 30 MW plant planned to be engineered with the ability to expand the power capacity in the future, if appropriate.

The construction spend for 30 MW is expected to be $37 million, with initial capital of $6 million committed at the end of 2019 to upgrade the high voltage reticulation on site and commence earth-clearing works in the first half of 2020.

Construction was scheduled to commence in 2020, however, as a precautionary move to protect the health and wellbeing of the workforce, non-essential 2020 capital expenditure was temporarily deferred, including the Sukari solar plant.

“This is in order to minimise contractors and other non-operating traffic on and off site, while restrictions related to COVID-19 remain in place,” the company said. Despite this, the company still plans to integrate solar power into the Centamin mine in 2021.

Centamin said it continued to work towards reducing emissions intensity and is in the process of establishing science-induced absolute emissions targets for medium- (2025) and long-term (2030) target years.

Other carbon reduction strategies being considered by the miner include transitioning on-site vehicles to electric vehicles and alternative truck buckets to improve hauling efficiency, it said.

West Africa investments about to pay off for Capital Drilling

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Capital Drilling’s push into West Africa will start paying off in the second half of the year, according to Executive Chairman, Jamie Boyton, with the contractor having sealed a number of drilling agreements in the region in the opening six months of 2019.

The company has progressively invested more resources in West Africa over the past few years, aiming to capture market share in a region where gold exploration is high.

The company recorded revenue of $54.7 million over the six-month period, a 0.4% year-on-year increase, while its average revenue per operating rig dropped to $183,000, compared with $200,000 in the first half of 2018, primarily due to new contract mobilisations. The group maintained guidance on anticipated revenues for the current financial year of $110-120 million, with revenue expected to increase in the second half of this year.

During the period, the company purchased an additional blasthole rig for the long-term contract at Centamin’s Sukari gold mine, in Egypt, as part of the group’s ongoing fleet management; made further progress in the establishment of its West Africa operations, with drilling commencing in Burkina Faso with Golden Rim Resources in May; and was awarded its first drilling contract in Nigeria with Thor Explorations Ltd, with drilling scheduled to commence in the December quarter.

The company also, in these six months, appointed Jodie North as Chief Operating Officer, increased business development resources, appointing Chris Hall to position of Business Development Manager, West Africa, maintained its ongoing rig improvement program and achieved a number of safety records at the likes of Sukari, North Mara (Tanzania), Geita (Tanzania), Tasiast (Mauritania) and Syama (Mali).

Boyton said: “The first half of the year was focused on further consolidating Capital Drilling’s presence in the highly active West African market, with a number of new contracts awarded, which will contribute to group revenues from the end of Q3 (September quarter). This strong push into this region has seen the commencement of our first drilling contract in Burkina Faso during Q2.

“Today we have also announced our expansion into Nigeria from Q4 (December quarter), a mineral rich, yet poorly explored country with significant potential, where we already operate a successful mineral analytics laboratory. Pleasingly, our major operations have also continued to achieve significant safety milestones throughout the first half.”

New contracts awarded during the first six months include:

  • Compass Gold Corp (Sikasso, Mali, pictured). Awarded a 10,000m exploration drilling contract, using one reverse circulation (RC) and one diamond rig from the existing fleet. Drilling commenced in June;
  • Golden Rim Resources (Kouri, Burkina Faso) (previously announced). Awarded a 20,000m exploration drilling contract using one multi-purpose rig from the existing fleet. Drilling commenced in May;
  • Allied Gold Corp (Bonikro, Côte d’Ivoire). Awarded a five-year exploration drilling contract, using one diamond rig and one RC rig from the existing fleet. Drilling is scheduled to commence in December quarter;
  • Thor Explorations Ltd (Segilola, Nigeria). Awarded a five-year exploration and grade control contract, using one RC rig from the existing fleet. This will transition to grade control in 2020, with exploration drilling scheduled to commence in the December quarter and grade control in H1 2020;
  • Kinross Gold Corp: (Tasiast, Mauritania): MSALABs was awarded a three-year onsite laboratory services contract with Kinross at the Tasiast gold mine. Operations commenced in July 2019, and;
  • Resolute Mining Ltd (Syama, Mali). Awarded one-year extension of the long-term underground grade control drilling contract using two underground rigs from the existing fleet. Contract extended to June 2020.