Across Africa, mines are going deeper, rainfall patterns are becoming more erratic, and storm events are growing shorter but far more intense. The result is that dewatering is no longer a background maintenance task. It is now a frontline strategic discipline that directly affects safety, uptime and profitability.

Against this backdrop, the choice between diesel driven auto priming pumps and electric submersible pumps has taken on new importance. What was once a simple equipment decision is now shaped by risk exposure, energy efficiency, mobility requirements and total cost of ownership, both above and below ground.

Surface mines when speed power and mobility matter most

On surface operations, the impact of climate variability is immediate and unforgiving. Sudden cloudbursts can overwhelm pits, flood haul roads and destabilise pit floors within hours. When pit lake levels rise unexpectedly, response time becomes critical.

This is where high capacity diesel driven pumps continue to dominate. Trailer mounted or skid mounted units can be deployed rapidly without relying on fixed electrical infrastructure. This is a crucial advantage during storm events. Auto priming capability allows these pumps to cope with fluctuating inflows without delays, making them indispensable for unpredictable surface conditions.

Mobility further strengthens their appeal. As pits expand and inflow points migrate, production teams need dewatering equipment that can follow the work. Diesel driven solutions with integrated fuel tanks and controls reduce setup time and manpower requirements, enabling smaller teams to respond effectively. Pontoon mounted pumps add another layer of protection by maintaining reliable suction despite changing water levels, reducing cavitation risk and preserving pump performance.

Surface water also brings abrasive fines and silt, placing heavy demands on equipment. Pumps built with robust wear resistant components are no longer optional. They are a critical investment in uptime and longevity.

Underground operations efficiency and reliability below the surface

Underground mines face a very different set of challenges. Longer declines, wetter stopes and tighter control over electricity usage are driving demand for efficient continuous duty submersible pumps.

Electric submersibles, when correctly sized to their duty, deliver significant energy savings, particularly when paired with automated level controls and intelligent start and stop systems that prevent unnecessary run hours. Their compact design makes them ideal for confined underground environments, eliminating suction lines and reducing trip hazards while simplifying installation.

Water underground is often dirty, abrasive or chemically aggressive. As a result, pump design must go beyond basic performance. Advanced sealing systems, effective cooling, corrosion resistant materials, leakage sensors and heavy-duty cabling are essential to withstand harsh conditions and reduce the need for frequent retrievals and maintenance.

Application not preference drives the decision

There is no universal solution. Diesel driven auto priming pumps remain the preferred choice for emergency bypasses, stormwater management and pit lake dewatering where mobility and independence from the grid are critical. Submersible pumps excel in fixed installations and routine underground applications where reliable power is available and efficiency is paramount.

Total cost of ownership plays a decisive role. Diesel units incur fuel and engine servicing costs but avoid the need for electrical infrastructure. Submersibles generally offer lower energy consumption and fewer moving parts, provided they are protected, monitored and specified correctly.

Jordan Marsh, Managing Director of Integrated Pump Technology, stresses the importance of elevating dewatering from an afterthought to a strategic focus.

“The best dewatering outcomes come from pairing proven technology with a clear understanding of each mine’s hydraulic realities,” he explains. “That is why we supply world class brands with long African track records – Grindex for electric submersibles and Godwin for diesel-driven auto-priming units – and the local application know-how to specify them correctly for reliable long-term performance supported by localised support across the region.”

Why specification and support make or break performance

The cost of getting dewatering wrong is high. Undersized pumps can lead to flooding and lost production, while oversized pumps waste energy and accelerate wear. In remote mining locations, delays in spares or technical support can quickly escalate into serious operational risk.

Marsh highlights why trusted supplier relationships are critical.

“Mines need pumps that start every time, run to duty and keep running. Grindex submersible pumps and Godwin diesel-driven units have earned their reputations in Africa for exactly that – reliability in tough conditions. Our job is to combine these technologies with rapid support, correctly specified accessories and a spares pipeline that keeps risk low and output high.”

Integrated Pump Technology’s approach goes beyond supplying pumps. Complete solutions include correctly matched pipework, valves and strainers, alongside flexible service models.

Rental options are often ideal for seasonal rainfall peaks or emergency response, while ownership makes sense for long term predictable duties. Increasingly, digital controls, monitoring and telemetry are being integrated to provide real time performance insight, allowing issues to be addressed before they become failures.

Dewatering as a strategic advantage

As African mining contends with deeper operations, rising energy costs and growing climate uncertainty, dewatering is undergoing a fundamental shift. Pump selection is no longer about convenience. It is about engineering precision, risk management and operational resilience.

“By working with a reputable established company like Integrated Pump Technology – offering proven global brands such as Grindex and Godwin, backed by local expertise – mines can ensure they have reliable efficient dewatering solutions that safeguard production and protect profitability,” Marsh concludes.

Designed for reliability and durability, the Grindex dewatering, slurry and sludge pump range is gaining traction among mining companies operating in demanding underground and surface environments.

Highlighting the diverse capabilities of Grindex submersible pumps, Alfred Kelsey, Sales Manager at Integrated Pump Technology, notes the strong performance of the equipment in applications such as desludging underground dams.

A recent project delivered through Kitwe based distributor IES saw the 14 kW Grindex Bravo 400 successfully address severe sludge accumulation that had significantly reduced dam capacity.

“Our customer faced a serious challenge, with sediment accumulation drastically reducing the capacity of their underground dams,” Kelsey explains.

“Conventional dewatering pumps aren’t designed for handling this slurry density, but the submersible Grindex Bravo 400 proved ideal.”

Built with robust hard iron construction, high abrasion resistance and an integrated agitator, the Bravo 400 is engineered to re suspend settled material, enabling efficient pumping of dense sludge. The pump’s IP68 ingress protection also allows safe and reliable operation at depths of up to 20 metres, making it suitable for demanding underground applications.

Demand for Grindex submersible dewatering pumps is also increasing across the Copperbelt, driven by the need for dependable, easy to deploy equipment, Kelsey says.

“The reliability and quality of Grindex pumps are major drawcards, complemented by the integrated smart systems on the 2.2 kW to 18 kW models, offering genuine plug and play functionality,” Kelsey notes. “This feature allows for fully automatic operation with comprehensive built in protections.”

For higher capacity applications, Integrated Pump Technology supplies external control and monitoring panels for Grindex units ranging from 25 kW to 90 kW.

According to Kelsey, the pump range offers flexibility to suit a wide variety of abrasive operating conditions.

“Customers can specify nitrile rubber or polyurethane linings to handle highly abrasive environments,” he adds. “A popular choice is internal polyurethane inserts paired with a lightweight, corrosion resistant stainless-steel casing.”

The stainless-steel construction significantly reduces pump weight, an important advantage for underground operations where equipment often needs to be manually transported and handled. Portability is further enhanced by the split handle design, allowing pumps to be carried by two people when required.

“Our rapid response capability sets us apart in the Copperbelt region,” Kelsey emphasises. “Through our close partnership with IES, we ensure technicians remain highly skilled, aligned with OEM standards and equipped with a first-class workshop.”

This local support capability enables fast turnaround times for repairs, ranging from complete pump rebuilds to minor cable repairs, as well as on-site technical assistance when required.

Kelsey also highlights the importance of managing local inventory levels to ensure the continuous availability of critical spare parts and minimise operational downtime.

While it is true that the selection of a dewatering pump for a mine or quarry largely hinges on specific site or application requirements, Steve du Toit, Sales Manager at IPR, believes that the supplier’s expertise should be a principal factor.

“Each of our installations starts with a detailed assessment of site-specific dewatering requirements. Through that process, IPR’s technical experts get a clear understanding of the unique conditions of the mine, such as water volume, pit dimensions and site-specific challenges. After this, the IPR team is able to recommend the most appropriate equipment and strategies for dewatering, ensuring optimal performance and cost efficiency for the customer,” says Du Toit.

Choosing the right pumps

According to Lee Vine MD of IPR, site-specific conditions, such as volume of water to be pumped and the rate at which it accumulates, will inform parameters such as head (the height at which a pump can raise the fluid up) and flow (the amount of water the pump can move at a given time) which, in turn, determine the size and type of pump or pumps required.

Dealing with a supplier that can offer a wide range of choices means that operations can get all their dewatering pump needs from one place. For example, IPR offers both diesel-driven and submersible dewatering pumps. Designed to be fully submerged in water during operation, submersible pumps are ideal for operations where continuous dewatering is required. IPR’s self-priming diesel driven pump sets are suitable for dewatering applications where power is not readily available.

“The next consideration should be the capital situation for the customer. The financial position of the mine or quarry determines whether to buy or to rent a dewatering pump solution. If capital outlay is an issue, rental will be ideal because it eliminates the need for a substantial upfront capital expenditure, freeing up the much needed budget for other pressing needs,” says Vine.

In addition, says Vine, rental costs can be classified as operational expenses and this is especially important where dewatering is a critical necessity, yet there is no capex available. In a scenario where the project is long term and capital is available, outright purchase makes sense.

In conclusion, says Du Toit, when choosing vitally important assets such as dewatering pumps it is also important to consider the reputation of the brand and the aftermarket support behind it. IPR is part of the Specialty Rental division within the Power Technique Business Area of Atlas Copco and supplies the premium Atlas Copco product, which is known for its reliability, good warranty terms and, more importantly, parts availability from IPR. The company is also the official distributor for Toyo heavy-duty slurry pumps and supplies the locally manufactured SlurrySucker dredging solution.