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Putting the benefit back into ore beneficiation through optimised steam generation

Home Engineering HVAC Putting the benefit back into ore beneficiation through optimised steam generation

EFFICIENCY, reliability, maintenance, sustainability, fuel selection and procurement are just some of the challenges facing the mining sector – and, as one of South Africa’s leading operations and maintenance service providers to the steam and boiler sector, Associated Energy Services (AES), is perfectly placed to optimise these.

AES commercial director, Dennis Williams, says that AES has walked a “long and well-trodden path” with many different industries and is currently focusing on growing its footprint in this pivotal sector.

“Our ability to deliver efficient steam generation is based on reliability and the continuity of operation as well as on the cost of production. Any opportunity to improve on production costs through reduced fuel usage will definitely have a positive operational and financial impact,” he says.

Superior energy from steam

Williams says that, although steam is often taken for granted or even relegated to history as having no part in modern industrial processes, it is in fact an important and useful energy carrier. Within the mining context, the energy generated from steam assists with everything from downstream ore beneficiation and specialist mining processes to on-site cooking and heating for mineworkers’ accommodation.

“Typically, while a mine’s steam plant is operating and supplying steam, there is little concern. However, few mines operate their steam generation facilities with the same care as their core production equipment. Hence, this aspect of their operations and maintenance tends to lag behind the others – and this is where AES can assist,” he says.

AES’s experienced assistance encompasses many aspects, including operational efficiencies and maintenance planning, shutdown maintenance or even supplementing the often limited steam boiler operation skills pool available to mines in remote locations.

“How are you managing spare parts procurement? Can you locate a service provider? These are things that are part of our daily planning. Therefore, prospective mining clients can be sure that, when challenges arise, we are able to turn things around in the shortest possible time,” he adds.

Efficiency and productivity are the key deliverables specified as part of its service level agreements – topped off with a performance guarantee for which the company is well-known. Furthermore, Williams says that AES takes pride in partnering with clients to create bespoke solutions based on their specific operational challenges and objectives.

Mining bespoke solutions

Bespoke solutions often depend on the skills and management that have historically been on-site, and the type of plant and equipment in play.

“A key focus would be on areas which the mine finds particularly challenging – as well as on their operational strengths. Potential clients in the mining sector will soon see just how far-reaching taking something like steam generation out of their scope of management – and letting AES look after it – can be. They will also see how the benefits flow from that upstream to their beneficiation process.

“If you have reliable, good quality steam, you can optimise your process to the maximum. You no longer have to account for outages or drops in pressure from the steam supply side,” he explains.

AES begins with a careful site analysis, before coming up with proposed technical solutions. In some instances, the plant in use may not be fit for purpose or require changes in how it is used or configured.

“From a skills and efficiency commitment perspective, we can address challenges – whether it is maintenance and reliability or just understanding problems as a result of poor fuel selection or poor operations control. This can even extend to other areas such as sustainability, including carbon footprint reduction and reducing the consumption of water,” he notes.

Remote monitoring, valuable insights

AES’s remote monitoring system (RMS) also plays an important role here.

“When we arrive on-site and share data through our RMS system, we can make a client more aware of the impacts that their operations have on our ability to supply them with steam efficiently and reliably. Our RMS system is an Internet-based interface, and clients can set up their own tailored dashboard to provide key metrics that will influence their processes moving forward,” he says.

Williams adds that AES is also able to assist with potential expansions. “Many mines want to open new reserves and explore new operations – but they are constrained as the national energy utility is not always able to supply them with sufficient power. In this case, AES will recommend and propose standalone power generation solutions to allow mines to develop such opportunities.”

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